Carrying out the process of cutting metal and metal structures using machine tools is much easier, safer and more comfortable than using hand tools and tools. But not every tinkerer can purchase a high-quality machine.
This is the reason that many people prefer to construct such mechanisms with their own hands, using what is in everyday life, for example, saws or grinders.
Why are cutting machines needed?
Summer cottages always require minor repairs: replace a greenhouse stand that has worn out over time, make a fence for the plot of land from metal, repair garden wheelbarrow or a trolley - cutting metal at right angles or with a bevel is always necessary. Complete preparations for any metal products easier and more quickly due to the machine.
Using cutting machines, you can cut any materials: steel, cast iron, copper. Cutting is done at angles of 45º and 90º. You can make products with your own hands from pipes of all diameters. As a rule, cutting mechanisms are used for cutting semi-finished products into measured lengths.
Metal processing equipment can also be used to process other materials, eliminating the work of the cutter. Machine made with my own hands, compact, it is possible to install it under a canopy, and in winter move it to the workroom.
You need a flat and hard surface with lighting. A similar corner can be found on the site of any building. All-welded and collapsible structures equipment. In order to reduce manufacturing costs, the device can be periodically given to neighbors for temporary use.
Cutting machine device
Any work that involves either metal or wood requires a cutting process, for which special cutting equipment is used. The application of this device is incredibly wide: from everyday needs and everyday life, to large plants and factories.
It should be noted that machines of this type are mechanisms that will allow you to perform transverse cutting of metal.
Cutting machines can cut parts from any type of metal: from copper and PVC profiles to large steel blanks. Semi-finished products can be cut at right and sharp angles. Applying cutting machine, you can use cutting pipes of large and medium diameters.
Most important mechanism The device, its “soul,” is an electric motor and a working element – a cutting wheel, which are connected to each other by means of gear or belt drives. Each of these types has its own advantages. For example, the inherent easy running of the belt, resistant to various types of loads, less noisy. It can even be mounted on a massive cutting machine.
Gear oversized, and due to this feature it is suitable for a miniature homemade cutting unit. Therefore, in the process of purchasing a cutting mechanism, you need to look at the type of gear used.
Almost any type of machine is equipped with abrasive wheels, but sometimes you come across mechanisms on which a carbide disc is installed. Moreover, all such metal saws are equipped with a vice that securely fixes the product or semi-finished product.
Video: homemade cutting machine from an angle grinder.
Homemade metal cutting machine: manufacturing instructions
A machine made with one’s own hands has an undeniable advantage: it is made to meet the requirements of a specific craftsman and the products planned for future production. To work you will need:
- 24th corner;
- 10th channel;
- pipes;
- welder;
- rolling bearings;
- electric drive;
- container for mounting an electrical circuit;
- start toggle switch;
- starting circuit;
- winding;
- drill.
Assembly progress:
- From corner No. 24 and using an angle grinder, cut the blanks onto the frame with your own hands, its dimensions are 400x600x1200 mm;
- Using a welding machine, the workpieces are welded together;
- Channel No. 10 is welded as a guide, which at the same time will add strength to the entire structure.
- Using screws, two vertical supports are secured to the channel;
- Using pipes, make a frame 400x600 mm for subsequent installation of the electric drive and shaft at the required angle;
- On the “tail” part of the frame there is a plate with a fixed electric motor. It is advisable to use an asynchronous motor, as it is unpretentious. Depending on the future purpose, you can give preference to a motor whose power will be in the range of 1.5...3 kW and “power it” from a three-phase network. If it is possible to use only a 1-phase network, select a motor with 1/3 power greater than the calculated value, connected using capacitors;
- Using a lathe, make the shaft and flanges, pulley and supports. The flange must protrude by 30.32 mm.
- Install the support bearings and pulley;
- The installation of the box with the electrical circuit is carried out directly in the lower area of the frame.
- A 12 mm shaft is attached between the racks, onto which the sleeve is placed. The distance between the shaft and the bushing must be kept to a minimum and a sliding fit must be ensured.
- A rocker arm from the 10th channel (L=800 mm) is welded onto the bushing using a welding machine; the ratio of the arms of the rocker arm is 1 to 3. Its stroke is limited by a chain.
- An electric motor is installed on the short section of the rocker, and a cutting mechanism is installed on the long section.
- A belt drive is laid from the electric motor to the shaft.
The price of a container for an electrical circuit made by yourself will be slightly lower compared to one purchased at a hardware store. To provide power to the equipment, you need a three-pole circuit breaker, from which power is supplied to the electric motor, an emergency shutdown button and a starting circuit.
The emergency button is connected directly, the electric motor is connected using a box and an automatic machine. This will ensure complete safety and electrical protection of the equipment you make.
Based on the above, making a cutting mechanism with your own hands is not only cheaper, but also more practical, since during its manufacture you yourself adjust its parameters and make adjustments for its future operation.
Also, having done this procedure once, you can repair such equipment without any problems. Moreover, if necessary, you can earn money by making cutting equipment with your own hands.
Video: homemade metal cutting machine with your own hands.
The cutting machine is considered a great helper for craftsmen. cross-cutting machine. But for performing one-time and non-permanent work, its purchase is not justified. More often they use for cutting workpieces. And when long work The quality of the cut decreases due to fatigue. Designs for attaching an angle grinder are available for sale. But they are designed for a specific model. The best option is to make the machine yourself.
Advantages of homemade equipment
The widespread use of grinders has led to the fact that there are a great many of them on hand. And in case of minor violations, professional workers refuse them for safety reasons.
But home craftsmen cannot afford such luxury. From angle grinders they make cutting and circular machines, chain saws for cutting metal and wood. Why are cutting machines made from grinders?
Anyone who has worked with a grinder knows that it is absolutely impossible to cut a workpiece from a pipe, and especially from a profile pipe. You have to use a square to mark each side and turn the pipe over when cutting. Still, the dimensions may differ by 0.5 mm. And when welding thin-walled parts, the metal burns out due to a defect in incomplete fit.
To cut metal, you need a grinder with sufficient power. Models with a circle diameter of 180 mm or more are quite suitable.
Although models with a 125 mm circle are suitable for working with thin-walled rolled products, the installed circle of a larger diameter remains without a protective casing, which can lead to injury if it breaks cutting wheel.
Construction of cutting machines
When designing a homemade cutting machine from an angle grinder, the following factors should be taken into account:
- The bed, or base, must be strong enough, stable, and heavy. For reliability, it must be attached to a workbench or table.
- Cutting equipment must be positioned strictly perpendicular to the base.
- The cutting wheel feed mechanism is equipped with a return spring or counterweight to prevent damage to the abrasive disc.
- For convenience and safety of work, the design is equipped with a handle. The best option It will be if the angle grinder can be lowered by the standard handle.
- The protective cover prevents sparks from entering the worker.
- Clamping device. Securing the workpiece is a necessary requirement for obtaining a quality cut.
- If you plan to cut a large number of workpieces of the same size, then the structure can be equipped with a movable stop.
- Starting device or emergency shutdown. Constantly turning on the grinder with a standard switch is inconvenient. And specialized starting devices have internal protection.
Models of metal cutting machines
The equipment sold is equipped with a rotating tabletop for cutting at different angles. Homemade products are made in two versions: rotating at an angle of 45° and non-rotating. For each option, you can find do-it-yourself drawings of a cutting machine from an angle grinder with full detail on the Internet.
Rotating device
To manufacture this version of the machine you will need:
- steel angle 50 and 40;
- water pipe with conditional passage DN32 and 25;
- 15x15, 20x20; 25x25;
- steel sheet 4 mm thick;
- closed or semi-closed radial bearings 202 - 2 pieces, thrust bearing 8102;
- M14 pin;
- hardware M6, M8 and M14;
- doorstop;
- tin or galvanized.
Manufacturing procedure:
The result was a fairly compact design with pipe clamping, spark protection and a flat base surface.
Fixed option
Unlike the first model, this design is more technically complex. It has an ear wheel reach adjustment. She received this opportunity due to the use of car racks of the car.
Due to the thin frame of the struts, brackets are required into which the shock absorbers are inserted. The diameter of the pipe is selected for specific shock absorbers. The do-it-yourself frame for an angle grinder, the drawings of which are presented, is made from a corner. The remaining blanks are manufactured according to the drawings.
Welding of the structure should be done semi-automatically. The height of the seam is minimal, and there is no need for further cleaning. To facilitate movement, the mechanism is assembled on bearings. This eliminates backlash and jamming. The lifting height of the angle grinder is limited by the crossbar and the pin. By unscrewing the nut, the shock absorbers lift the mechanism upward. This ensures the use of different models of angle grinders.
For sawing pipes at an angle, the structure is equipped turntable. The rigid mounting of the pipe cutter ensures an accurate cut, and the required angle is provided by the rotating mechanism, which must be secured in the desired position.
As you can see, you can make a disc cutting machine for metal with your own hands without using a lathe or milling machine.
Making a chain saw from a grinder
With your own hands, if you know how, it is not difficult to make a chain saw - this is a hand tool, and the grinder is used as a drive. Due to the high revolutions, you can use a low-power angle grinder.
The main element of this design is the tire. It must be secured so that the axis of movement saw chain matches the installed drive gear. Therefore, when making a bracket you cannot do without milling machine. Any minor deviation is fraught with tragic consequences.
Work order:
- The bracket is manufactured according to the drawing of the working version for a specific model.
- Two studs with nuts are screwed in to secure the tire.
- The bracket is fastened to the body in the mounting holes of the protective casing.
- A gear is put on the grinder shaft. It is secured with a clamping nut. Outside diameter The nuts are larger than the gear, which will prevent the chain from falling off.
- After the chain is put on, it is necessary to tension it and secure the bar with nuts.
Among the disadvantages is this chain saw It should be noted that it operates without lubrication, which leads to significant heating and rapid wear. The oil must be applied by hand. The absence of a brake allows the chain to still rotate for 30 seconds after removing the voltage from the electric motor. The small size of the grinder and the long tire affect the ergonomics of the design.
But it’s still surprising that modern Kulibins are capable of grinder make many devices, the cost of which in stores reaches tens of thousands of rubles.
Nowadays, there are a huge variety of different tools for cutting metal. Many of them are manual and have a large number of inconveniences. The rest of the instrumentation is considered automated and has large dimensions or a large price category.
To combine business with pleasure, as well as convenience and price range, craftsmen created a disc cutting machine. Below we will look at everything related to this equipment.
The scope of application of this machine equipment extends to industrial applications and domestic use. Used for cutting various types metal (steel, cast iron, copper, aluminum, etc.).
Since in everyday life there are a huge number of different metal objects that require minor repairs, this machine becomes extremely necessary. After all, lowering the cutter stand with the cutting disk once will be easier and faster than manually sawing with a hacksaw.
The dimensional characteristics of homemade equipment allow it to be placed under a canopy, in summer time, and in winter it can be safely placed in a warm garage or workshop.
Tip: It is extremely important to choose a smooth and solid place to install the bed ( concrete slab, thick corners, or concrete the support legs of the frame). This is done in order to reduce the possibility of vibration to a minimum during operation.
In production, automated systems are mainly used, which are controlled by an operator via CNC. The goal is mass production of metal products, in the form of cutting pipes of given sizes and various sections, flat rolled metal and much more.
Below we will look at the criteria by which this machine equipment is distinguished.
Classification of cutting machines
All cutting machines are distinguished according to a huge number of criteria. We'll look at the most important ones. So, the main technological criteria:
By type of toolkit
The separation occurs directly on the tool that cuts the metal products. In turn, they are divided into the following subspecies:
Band saws
In this case it is used band-saw with teeth. The belt is made from high-quality high-speed steel. Due to the fact that the cutting tape is thin, there is a saving in material consumption due to the thin cut. Band machines are used in production.
Hacksaws
They are used in small industries, as well as in everyday life. Hacksaw tools can be hand-held (the well-known hacksaw for metal) or an electromechanical machine. In this case, hacksaw blade made from various metals(high speed steel, carbon steel, alloy steel, bimetallic steel). This type is quite easy to operate and is considered a convenient tool.
Disc machines
They belong to the category of indispensable tools. Used throughout the metalworking industry. Using such equipment, high-quality cutting of metal can be carried out even by an unqualified person. In addition to industry, this machine equipment is widely used in everyday life.
By number of cutting edges
Single head
The design has one cutting disc. This type of machine is low-productive of its kind and is capable of performing only one operation.
Double head
Their design uses two “heads” for attaching disks. In this case, one “head” is firmly fixed and motionless. The second has the ability to move in independence in the first. This equipment is considered a high-performance tool.
By type of saw blade feed
Front saw blade feed
The center of the disk moves in a horizontal plane.
Bottom feed
The center of the disk moves from bottom to top along a vertical plane.
Pendulum feed
The center of the cutting disc moves like an arc, from top to bottom.
Vertical feed
The center of the disk moves along a horizontal plane from top to bottom.
By main type
Cut-off saws
This tool is used to cut dimensional pieces of rolled metal. Well suited for small-scale production.
Abrasive - cutting
When working with such equipment, abrasive wheels are used. High-quality cutting of metal residues (burrs) is carried out. Cutting the material into blanks, cutting profile metal at the required angle from 0 to 45 degrees.
Correctly-cutting
Such equipment processes metal produced and supplied on coils (reinforcing steel, metal strip, wire, rods with a profile section). This equipment is equipped with the correct mechanism and automatic unwinding of metal from the reel. The twisted wire enters this mechanism, is straightened over the entire plane and fed into a special receiver for further processing.
Tip: Depending on the material to be cut, you need to select suitable cutting discs. The discs must meet the technical specifications.
Disc machine device
Frame
Or a metal structure that plays the role of the base of the unit.
Pendulum unit
This is a kind of metal part made of a metal profile, which looks like the letter “T”. The movable side is mounted on a bracket located on the frame. The movement of the pendulum is carried out by means of bearings, and the return to its original position is carried out by a flexible part (a strong harness or a small spring).
Pipe clamp
The so-called vice, mounted on the bed. They allow you to press the workpiece to give it a stationary position.
Pendulum unit axis
This axis is used to move the disk.
Electrical engine
The heart of the unit. It is he who puts the whole mechanism into action. An asynchronous motor is used for this equipment.
Actuator
A box containing electronics that is connected to the electrical network. On this box there are buttons to turn it on and off.
Wheel protective cover
Steel protection that prevents fragments from the disk from falling directly into the person working on the unit.
Belt guard
Located where the belt makes its movement. This casing is designed to protect a working person from being hit by a belt if it breaks.
Pendulum assembly handle
That part with the help of which pressure is exerted by the cutting disk on the workpiece.
Ground bolt
As with all machines, there is a bolt on the body of the unit that is used for grounding.
Abrasive wheel
Direct cutting disc consisting of various materials.
Sling brackets
(4 units)
bed
This is the area where the main unit of the unit is located.
Adjustable stop
Due to this, the required size of the future product is fixed.
Tip: If your budget is quite modest, then you can use scrap materials to create parts of the unit. If your budget allows, then it is advisable to purchase all the components in the store. This will improve performance and service life.
Manufacturing of a disc cutting machine
Any invention will require certain parts, whether purchased elements or homemade parts. To create a cut-off brainchild you will need the following:
- Metal corner with dimensions No. 24.
- Metal channel No. 10.
- Movable shaft.
- Tubes for making a handle.
- Welding machine.
- Bearings for the pendulum mechanism.
- Electric drive.
- Box for storing electronics.
- On/off toggle switch.
- Starting circuit.
- Winding.
- Electric drill.
- Fastening elements (bolts, screws).
Let's look at the progress of assembling all the equipment:
- First of all, with a grinder, blanks are cut into a frame with dimensions of 400x600x1200 mm.
- Using welding, the frame is assembled from prepared parts.
- A channel is welded over the entire frame. It will give additional strength to the machine and serve as a guide.
- Several vertical supports are screwed onto the channel.
- Next, the next frame is installed, on which the engine and shaft will be located. The frame dimensions should be 400x600 mm.
- A plate intended for the engine is attached to the frame. The best electric motor for these purposes is an asynchronous motor. Its power should be from 1.5 to 3 kW. After installing the engine, it is necessary to connect it to a three-phase network.
- The shaft, flanges, supports with a pulley are made on a lathe.
- Next, the bearings and pulley are installed.
- The box in which the circuit is located is installed in the lower part of the frame.
- A shaft with a sleeve is inserted between the vertical supports. Shaft diameter 12 mm. The gap between the bushing and the shaft should be kept to a minimum.
- On both sides of the bushing, limiters made from pieces of channel are welded.
- An electric motor and a cutting mechanism are installed on a long support beam and on pieces of channel.
- The final step is to install the belt that connects the shaft and the motor.
Based on the above assembly steps, we can conclude that it will be much cheaper to assemble such a unit with your own hands. Moreover, during the assembly process, you yourself adjust the entire mechanism, as they say, for yourself.
The button, which is intended for emergency situations, is connected directly, and the engine is connected through a box with a circuit and an automatic machine.
Tip: If you have assembled such a structure with your own hands at least once, you can easily repair such units. This is because you will know the entire mechanism of such a machine by heart.
Manufacturing a cutting machine based on a grinder
In addition to the classic variation of the cutting machine
There is also a simplified version of the machine using a grinder (angle grinder). In this case, a frame is made into which the second frame is attached to the sleeve. It is on the second frame that the angle grinder is secured using metal fasteners.
In order for the grinder to return to its original position, it is necessary to secure the frame and grinder with a tight rubber band or spring. The frame itself is mounted on a prepared bed or on a large and heavy table. The heaviness of the table will ensure a minimum of vibration. If a frame is being prepared, then it must be mounted on a foundation prepared in advance. Such an invention can serve as a good tool in a home workshop or as an excellent device for cutting metal.
General reviews about the machine
If you look for reviews on the Internet about this unit, you will only find positive reviews. Indeed, such an invention is very convenient in its own way. With its help, you don’t need to suffer with the grinder in your hands, in a bent state. If you choose a cutting tool for certain jobs, then only a disc cutting machine.
Video reviews
Video review of the disc cutting machine:
Video review of a cutting machine using a grinder instead of a disk:
Video review of the assembly homemade machine:
Video review of the cutting machine:
Metal cutting machine - indispensable tool in a home workshop, metal shop, or on a construction site. Many industrial models of these tools are produced, but their price is sometimes unaffordable not only for a private craftsman, but also for a small enterprise. There is a solution - it’s not at all difficult to make a metal cutting machine with your own hands. This requires only certain skills in working with a welding machine, plumbing tools, and some qualifications as an electrician. You also don’t need anything scarce or unavailable for free sale from materials.
Materials and tools
To work you will need:
- Bulgarian;
- welding machine;
- drill;
- set of dies, taps, wrenches.
You will have to buy an electric motor with a power of 1.5-2 kW, single-phase or three-phase. In addition, you will need two pulleys, a shaft, bearings 204 or 205, a metal corner, and sheet steel 2-4 millimeters thick. When all this is assembled, the actual production of the machine begins.
In this article we will look at the manufacture of a machine based on an electric motor.
You can make the drawings yourself using material from the Internet, or use ready-made ones, such as these. But experience shows that it is best to adapt the drawings to the materials that you have available. As a rule, DIY designs work best when you “customize” them to suit you. Naturally, one should observe certain rules and the requirements that are put forward for a tool of increased danger, such as a cutting disc machine or pendulum saw, both homemade and industrial.
Most do-it-yourself metal cutting machines are of the pendulum type. Band machines are more complex to manufacture, but they can be made in a small workshop or metalworking shop. For now, let's focus on the most convenient type of cutting machine - a disk one. The general design can be seen in the video.
It consists of several main components:
- electric motor;
- pendulum;
- drive mechanism;
- cutting disc;
- desktop.
Let's look at them separately.
Engine
Depending on the required power of the metal-cutting machine and the scope of its use, we select the engine power. It should be in the range of 1.5-3 kW. If you plan to use a cutting machine in a home workshop, a small metalworking shop, where cutting profile pipes, fittings, angles or other rolled products is done relatively rarely, and thin-walled metal is used as workpieces, a power of one and a half kilowatts will be enough. For small-scale production, work on a construction site, or the manufacture of frames for any purpose, a more powerful engine will be required.
If you have a three-phase motor with a power of about 3 kilowatts, it can be connected to 220 volts using a star circuit instead of a delta circuit. But it must be taken into account that its power will decrease by 25-30%. The main thing is that the speed indicated on the nameplate will be maintained.
To install on a metal cutting machine, the engine must have a speed of 2500-3000 per minute. This is due to the fact that it is at these speeds that the cutting disc operates optimally.
For a homemade metal cutting machine, circles with a diameter of 300-400 millimeters are used. Here, too, you need to proceed from the needs of production. You shouldn’t chase too large a disk diameter - the farther the working edge is from the center, the less cutting force, and a more powerful engine will be required. The optimal ratio of engine power and disc diameter is 2 kilowatts at three thousand revolutions and 300 millimeters in diameter.
A self-made metal cutting machine must first of all be safe. The cutting discs indicate the maximum number of revolutions at which they can be operated. As a rule, it should not exceed 4400 rpm. If it turns out more, the disk may collapse, which is unsafe. If the number of revolutions is less than 3000, then the cutting speed will be insufficient, and the disk will overheat and wear out. It is these figures that should be taken as the starting point for calculating the power transmission.
Drive unit
It is most convenient to use a belt drive as a drive mechanism. To do this you will have to find two pulleys of the same diameter. One of them is mounted on the motor shaft, the second - on the drive shaft of the cutting disc. The disk shaft is mounted on two bearings. It is best to use the scheme when the drive mechanism is located on the left of the disk mounting cloud. It’s more convenient to work this way, and safety rules are followed. The disc fastening nut will not be at risk of loosening.
Drawing of a cutting machine for metal To tension the drive belt, the engine is mounted at the rear of the pendulum with 4 bolts located in longitudinal slots. It can shift in the direction of the central axis of the machine (perpendicular to the axis of rotation of the motor shaft) by 5-7 centimeters. This will maintain the required belt tension and prevent it from slipping. It will also be easier to replace the belt if the previous one becomes unusable.
Console (pendulum)
The cantilever part of a metal cutting machine is one of the most important. In addition to the fact that it must be carefully balanced, securely welded in compliance with all the required dimensions, it must also move strictly perpendicular to the work table. The basis for mounting the pendulum are two vertical racks with slots for the pendulum bushing (diameter 10-12 mm). It is best to make them from a steel square of 40x40 millimeters. The height is approximately 80-100 millimeters, but you can calculate your own version.
A bushing shaft is installed horizontally in the holes of the racks, to which a rocker arm is welded, consisting of two levers, the ratio of which is one to three. A platform for installing the electric motor is welded on the short arm. On the long arm there is a cutting wheel drive shaft. The ratio of the lengths of the levers is approximate; it must be calculated so that in the non-working position the weight of the engine outweighs the weight of the assembled saw part (with protective covers). To bring the disk of the switched-on machine into contact with the metal, it is necessary to apply a small but noticeable force.
For ease of operation, it is attached to the bottom of the engine platform. return spring, and the upward deflection angle of the pendulum is regulated by a cable or chain, fixed at one end to the table and at the other to the bottom of the long lever.
Desktop
The optimal dimensions are 700x1000x900 mm. It is welded from a 25x25 mm corner and covered with a steel sheet 3-4 mm thick, in which slots are made in the rotation zone of the disk. A rotary stop and a clamp with a rotary clamp are fixed on the table. This allows you to cut both perpendicularly and at the required angle. Very interesting option homemade machine is shown in the video. Here it is not the workpiece that turns, but the console with the disk and the motor.
Installing a disc-type cutting machine is not particularly difficult for a qualified mechanic. It is important to adhere to some fundamental requirements:
- correctly calculate the disk rotation speed;
- adjust the angle of rotation, it must be strictly perpendicular to the plane of the desktop;
- set the force for feeding the disk into the cutting zone;
- install an emergency stop button on the handle;
- equip the cutting machine with protective covers for the disk and rotating parts.
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Self-construction of a metal-cutting machine
An example of a homemade machine for precision work When, for some reason, you often have to process metal at home, you come to the understanding that working with an angle grinder is at least inconvenient. Cutting metal is much easier if you have a metal cutting machine. With its help, the cutting line will become ideal, and the established process will go much faster.
But if you think about buying such a machine and look through the prices in the store, you will find that they are very expensive, not every person can afford it. The way out of this situation is to make a metal-cutting machine with your own hands.
Homemade metal cutting machine
Equipment classification
So, let's start with general information about metal-cutting machines. Structurally, they are all united by the presence of an electric motor, transmission and cutting disc. Finding a drawing for the manufacture of such equipment is not a problem. Once you become familiar with how a disc cutting machine works, it won’t be difficult to make the adjustments you need while building it yourself. Now let's look at the main fundamental nuances:
Drawing of a transmission mechanism for a cutting machine 
Cutting equipment is also classified according to the type of saw installation:
- Band machine.
- Abrasive-cutting.
The latter is designed for cutting thick metal fittings, various rods, square profiles and pipes different diameters. Here you can cut various solid parts and profiles for different angles. The band saw operates on the basis of a closed cutting saw, so it is not a circular saw, the saw moves on pulleys. It’s worth saying right away that it’s easier to build a disk version with your own hands.
Self-production
To build your own disc cutting machine you will need:
Mechanical part of cutting machine - Steel corner.
- Welding machine.
- Bearings.
- Chain.
- On/off button.
- Channel.
- Electric drill.
- Sheet of steel for the work surface.
- Electric motor.
- A box that will contain the electrical component.
Having collected everything necessary materials and tools, you can begin construction. First of all, it is necessary to make the frame of the machine from a steel corner. First, they cut out according to the drawing individual elements, figure out how they will fit together, and then weld them together with their own hands single design.
A guide channel is welded to the top of the frame, which will become the basis of the structure for attaching the cutting element of the equipment. This channel will be used to connect the cutting disc to the motor. At the next stage, vertical posts are attached to the channel, which are secured with bolts.
Now we need to weld another frame. It is made individually - for the specific electric motor that will be used in your machine. When choosing an electric motor, look towards asynchronous motors, as they are more reliable and durable. There is one more point here: the greater the power, the smoother the disk will operate.
Installation of equipment on the frame
Frame made of profile pipes Now you need to connect the working shaft to the electric motor with your own hands. How this will be done is not important, if there are instructions on the drawing, then follow them. If the installation is done correctly, the equipment should operate correctly and reliably.
One more point: if you cannot make any part yourself, then contact a turner for help. He will be able to make you the correct pulley for the belt or flanges for fastening.
It is best to secure the engine to the frame using ordinary bolts and nuts; attach the control panel and a box with an electrical circuit and a switch to the frame next to it.
The channel on which the cutting element is attached must be spring-loaded so that as soon as you release it, it returns to its original position. The most convenient way to secure the spring is with a clamp and bolts.
Pay special attention to the electrical component. There must be an emergency stop button for the machine and a starting chain. In this case, the electric motor must be connected to electricity not directly, but through a box and automatic machine. Switching on and starting the electric motor will be provided by a three-pole starting machine, and the shutdown button is also powered through it.
When completing the final installation with your own hands, do not forget about the protective casing that will protect your eyes from flying sparks.
Making a machine based on a regular grinder
You can also build a cutting machine with your own hands from an ordinary grinder. For example, you have a good, reliable Makita grinder, and you don’t yet need a full-fledged machine, since you will use it from time to time. In this case, just like in the previous version, you need to weld the frame and bed with your own hands, and make a moving part from a pipe or channel to install the grinder.
Cutting machine from an angle grinder Next, you will have to develop a mount for your specific angle grinder. The moving part is also spring-loaded, the technology here is similar. When making such a machine, do not forget that the grinder has such a thing as a reverse blow. This happens when the abrasive disc gets stuck in the workpiece and the grinder shoots back. In this case, fragments of the disk fly in all directions - this can seriously injure the person who is working. Therefore, when building equipment, pay attention to the protective casing if it is not on the grinder.
Collapsible machine from a grinder
Stationary frame-table for attaching an angle grinder Now let's look at another way to make a metal cutting machine from a grinder with your own hands. The benefit of this design is that the machine is dismountable and portable. The tool you will need here is the same as for making a full-fledged machine, which we talked about above.
The drawing will depend on the model of the specific grinder.
The first thing you need to know about such a machine is that it is made on the basis of two frames located on the same axis. Here the lower frame is made in the form of a movable clamp and angle, and the mount for the grinder is made to move along a vertical line.
The spring is also present here - it is needed to return the feed mechanism to its original position. Using a welding machine, you can secure a ruler with a special limiter.
A similar machine is started from a starting pedal, which is connected to the network using a low-voltage relay. Having assembled all the parts, the functionality of the structure is checked at idle. If everything works normally, no mechanisms rub against each other, then such a machine will serve you for a long time.
Considering that you can install various discs on an angle grinder, do not forget about the characteristics of the materials that you plan to cut. And, most importantly, never forget about safety precautions when working with metal-cutting equipment.
Video: Homemade cutting machine from an angle grinder
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Metal cutting machine
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I have long wanted to build an abrasive cutting machine for cutting metal in my workshop. Cutting metal with a grinder is not always convenient. The grinder copes well with cutting sheet steel, but cutting off the corner exactly and profile pipes using an angle grinder takes a long time and is not always convenient. It is necessary to mark on all sides and cut the workpiece on one side. Cutting is done on the ground in a bent position, holding the workpiece with your foot. Your back gets tired and sparks fly in all directions. And cutting a round pipe evenly is even more difficult and takes longer. It is more convenient to do this on a metal cutting machine, when there is no need to bend over, and the workpiece is securely and safely secured in the machine. It is very convenient to use such a machine to make a canopy from cellular polycarbonate or automatic gates. The machine was made from “what was at hand.” I tell and show you what I got, and you make your own amendments and make the machine even better from “what is at hand” at your disposal. I do not consider it advisable to describe the entire manufacturing process in detail; I will only focus on the important (in my opinion) points. The manufacturing process must be performed in the following order:
I made the machine in a different sequence and was faced with constant alterations and adjustments, which caused the process to drag on. If I decided to make a machine now, I would do everything in this order. Before starting to make the cutting machine, I studied the experiences of other people, from which I realized that:
I installed a 3-phase motor, since I have a 380V voltage in my workshop. If your voltage is 220 V, in this case you will have to install starting capacitors; there is a lot of information on how to do this on the Internet. Next, look at the photographs of the manufacturing process.
 The protective cover lifts up to replace the used disc with a new one. To do this, you need to unscrew just one M8 bolt from above.
 Possibility of adjusting the tilt of the rocker using metal plates. I did not install bearings on this shaft, but simply drilled holes for lubrication on top and plugged them with M6 bolts.  I borrowed the vice for clamping the workpiece from an old factory-made cutting machine, but I had to modify it a little. In this vise, the clamping screw nut can be divided into two halves, which is very convenient when installing and removing the workpiece.  Return mechanism You don’t have to do this, just change the alignment of the rocker shaft.  Spark arrester. 97 percent of all sparks fall into a removable container. Using a stop bolt (bottom), you can adjust the maximum angle of inclination.
How to calculate the required pulley diameter.We will assume that the cutting disc should rotate at a speed of 3000 rpm. The discs contain information about the maximum permissible rotation speed of 4400 rpm. So you decide for yourself at what speed your disk will rotate, the main thing is that it should not exceed 4400 rpm. To calculate pulley diameters you need to know:
Calculation example: Our engine rotates at a speed of 1500 rpm. The cutting disc should rotate at a speed of 3000 rpm. We have a pulley for the cutting disc shaft with a diameter of 65 mm. What kind of shaft should be on the engine?
How to calculate the length of the drive belt?The following data will be required for the calculation:
Calculation example. We have two pulleys with a diameter of 65mm and 130mm, respectively, their radii are 32.5mm and 65mm. The distance between their centers is variable (in order to tension the drive belt); for an example of calculation, let’s take the length between centers of 500 mm. We count half the circumference of each pulley in millimeters and add to the resulting number two distances from their centers (since the belt passes from one pulley to another and returns back to the first). 32.5mm x 3.14 (Pi) = 102.05mm (half the circumference of the first pulley) 65mm x 3.14 = 204.1mm (circumference of the second pulley) 102.05 + 204.1 + 500 + 500 = 1306 mm (required drive belt length). For more accurate calculation you need to take the minimum and maximum length distances between centers, choose something in between that suits you.
 This is how the cutting machine turned out!Do the same. Do it even better.Good luck to you!Observe safety precautions when making itand operation! |
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Do-it-yourself cutting machine: design, diagram, manufacturing | Construction portal
Working with a cutting tool, for example, a grinder, many craftsmen understand how much easier it is to cut metal using a simple machine - both the work is more convenient and the cut line is ideal. But when looking at the prices for a cutting machine for metal, even the most primitive used one, there is a desire to make something like this device yourself. There are several ways to make a cutting machine with your own hands, for example, using a grinder or a disc. All designs have their disadvantages or obvious advantages.
Use of cutting machines in everyday life
When working with metal, it is impossible to do without welding, cutting, grinding and other types of processing. The ability to have the simplest machines on your farm for woodworking and metal is a huge help home handyman. In places where it is difficult to reach to carry out work, for example, cutting metal staircase or change something in the design of the attic, you will need a grinder or a circular saw. And cutting equal pieces of reinforcement, rods, small pipes and all kinds of metal workpieces is much easier to do on the working surface of the machine.
The same cutting tank can be used for other purposes to cut aluminum, plastic and other synthetic materials. However, it is not recommended to use metal cutting machines for woodworking purposes. Considering small sizes household metal-cutting machine and the general simplicity of this design, it will not be difficult to place it on your estate.
To operate the machine, you will need a well-lit area in the yard or garage, an outlet and a flat floor surface. And if it is no longer needed, it can always be taken to the workshop, pantry or utility room until the next use on the farm. Some designs of homemade machines can be assembled and dismantled, the frame or base of the structure will remain intact.
A homemade cutting machine can also not only be used at home, but also rented out in order to recoup the costs of its production - in a word, this is a very profitable device.
Classification of machines
Structurally, all metal-cutting machines combine an engine with a transmission, a cutting disk and the working surface of the machine. There are drawings for a cutting machine on most sites dedicated to various homemade products. Knowing the basic principles of operation of this device, it is easy to make your own adjustments in order to use the materials and mechanisms that are already on the farm.
1. The power of the motor used depends on the expected performance, and it is important to decide on this before making a cutting machine. Most off-the-shelf cutting machines have quite high power– up to 2000 W. Although the machine for household use may have smaller parameters, but do not forget that the metal is the same everywhere.
2. To maintain the power of the engine on which the machine will operate, it is important to choose a suitable kinematic transmission method. The most common are belt and friction friction transmission, each method has its own advantages. Gear transmission - gear, worm, chain, but last option most popular. Belt drive produces the least noise and is most often used on homemade machines, but for more precise machines it is not suitable due to the likelihood of the belt slipping. However, with any machine design, it is important to remember to comply with safety precautions.
3. It is advisable to equip even a homemade machine with a vice - to ensure guaranteed retention of the material being processed. Carbide disc or abrasive wheel– the choice is up to the master, depending on what is at hand, as well as on the most frequently performed work.
4. The metal cutting angle parameters can vary from 45° to 90°, but usually cutting is done at a right angle. Not every homemade machine has this advantage.
5.The diameter of the disk determines the height of the piece of metal being cut, but these parameters can be changed. For example, a wide, thin-walled pipe can be rotated while cutting, but it is difficult to secure with a vice. Mark volumetric metal structure on the working surface of the machine, sometimes it can also be problematic. Cutting machines, in most cases, have a working diameter of up to 400 mm.
6. The total performance largely depends on the disk rotation speed manual machine for precise metal cutting. The high speed of the machine directly affects the quality of cutting.
7. The weight and dimensions of a homemade machine are formed depending on the material general design, which it is advisable to equip the legs with vibration supports.
8. From serving cutting tool The type of cutting machine also depends - pendulum, with bottom or front feed. The disc is fed from above using a pendulum feed.
9. A homemade machine can have 2 cutting heads or one, respectively, there are single-head and double-head options.
The abrasive cutting machine is designed for cutting metal reinforcement, rods, profiles, I-beams, pipes of different diameters, solid parts and profiles at different angles. Works with an abrasive wheel.
A band cutting machine or band saw operates on the principle of a closed metal strip moving on pulleys.
At home, the easiest way is to build a cutting disc machine for metal. There are several ways to make a cutting machine with your own hands, but the most understandable will be the most simplest method.
The manufacturing process of a machine based on a cutting disc
To work you will need:
- steel corner,
- channel,
- drill,
- welding machine,
- electric motor,
- bearing pair,
- starting circuit,
- switch,
- coil,
- wooden board or steel sheet for the working surface,
- box to ensure the operation of the electrical circuit.
1. After preparing all the tools, make a frame or a general frame of suitable dimensions, for example, from angle No. 25. The parts of the structure are measured according to the drawing on a cutting machine and cut with a grinder, then welding begins. The finished frame can be placed on vibration-supported legs, which will facilitate the operation of the machine. It is easier to make the legs from the same profile or small diameter tubes.
2. Channel No. 10 is welded to the resulting table, which acts as a guide axis; it will become the basis of the structure for attaching the cutting part of the machine and connecting it to the motor. Next, the main parts are attached to the channel, including two vertical posts secured with bolts.
3. Next, you need to weld another frame from the profiles - this is the base for mounting the electric motor and the main cutting disk. On the other side of the frame, an electric motor with a power of about 1.5-2 kW is fixed. They are considered the most durable and reliable asynchronous motors. The motor will need to be powered from a 3-phase network. We remind you that a higher power engine will provide more straight cut and good speed of metal cutting work.
4. Shaft mounting method and general principle its connection to the structure is not important. A threading machine, when properly ensuring the supply of revolutions from the electric motor to the rotating shaft, must work reliably. The V-belt will help provide this. Some work can be ordered from a turner (shaft with supports, belt pulley and disk flanges). It is advisable to make the flange projection with a diameter of 32 mm.
5. Next, the support bearings are mounted in the sockets of the upper frame plates on the channel. Bolts and nuts can be used to secure the motor and shaft. Ensuring the operation of the electrical circuit is in a ready-made box with a switch, which is attached to the bottom of the frame.
6. The connection of the racks with a shaft with a diameter of 12 mm is made using a sleeve. To prevent it from slipping, the sleeve and shaft are connected with the smallest gap during a sliding fit. A rocker arm from the channel is welded onto the bushing so that its arm is in a ratio of 1:3.
7. You will need to install a rigid spring near the engine - to ensure return, it will even work from an expander. The springs and chains should be securely secured with bolts.
8. The electric motor is installed on the side of the smaller section of the rocker arm, and the shaft on the larger side. A belt drive will ensure the movement of the shaft.
9. An emergency stop button and a starting circuit are required, while the engine must be connected through a box and a three-pole circuit breaker, and the stop button leads to a direct connection to the network. Connecting the machine will be provided by a three-pole starter that starts the electric motor.
10. Be aware of the sparks that will fly from the disk - provide it with a casing. The work is first checked at idle, and only after making sure that the design is reliable, you can try cutting soft metal, for example, aluminum, in order to correct all inaccuracies. The working surface of the structure can be made of metal or wood and covered with thick plywood; if necessary for work, secure it with a vice.
The manufacturing process of a machine based on a grinder
There are several ways to make a metal cutting machine with your own hands - there are several on this topic good videos.
First way. The simplest device is a frame made of pipe, which will also serve as a comfortable handle. On one side, a transverse strip is attached by welding, on which there should be holes for attaching an angle grinder. The movable shaft will be attached to this base on a piece of angle, the same part can be attached to the floor of the garage or to the desktop. And on the other hand, it is attached to a spring, with the help of which the machine structure can return to its original position. If you attach the grinder correctly, the device will help you cut metal more accurately, freeing up one hand.
Don't forget about back kick grinders, when the tool is thrown back if the abrasive disc jams. And abrasive fragments from disc destruction can cause serious injury. An angle grinder attached to the machine with a closed casing minimizes such consequences. However simplest design does not make it possible to perform high-precision cutting, for example, when you need to cut small pieces of steel rod that require further adjustment.
The second way to transform an angle grinder into a cutting machine for metal work. This machine can be made collapsible.
To work you will need:
- welding machine,
- drill,
- steel corner,
- profiled pipe,
- channel,
- spring,
- relay,
- identical bearings,
- pedal,
- bolts,
- wooden board or steel sheet for the work surface.
1. A preliminary drawing or sketch is required, which indicates all the dimensions and necessary details. Ready-made drawings for a metal cutting machine are available on the Internet, but you will still have to make your own adjustments using what is already available on the farm. An easy sketch does not require precise measurements; it is enough to observe the proportions and have an accurate idea of each structural element. And remember that you will have to change the frame under different sizes working disk of the grinder.
2. Two frames on a common axis are the basis of the simplest machine frame, and it is better to weld them from metal. On bottom part it is necessary to weld the fastening, which will consist of a movable clamp and a clamping angle. The part on which the angle grinder will be attached must be made to move vertically relative to the bottom, like a pendulum. You cannot do without a spring; it is needed to return to the starting position. Additionally, weld a ruler with a limiter for accurate measurements.
3. The start of operation of such a machine will be ensured by a start pedal (button), connected through a low-voltage relay, supplying voltage to the angle grinder. After switching on, the design must be checked at idle speed. If the circle does not touch the casing and rotates freely, then you can use the design in practice - a homemade machine for cutting metal is ready.
4. This design can be collapsible, and other removable disks can be installed on the grinder. When working with other materials, be aware of the characteristics of the materials when cutting them. Remember safety precautions and precautions when performing metal work.
From this article you can learn how to make a metal cutting machine with your own hands at home using the most simple materials. All stages of creating structures based on a cutting disc or grinder are described here in detail: preparation of materials and tools, calculation formulas, detailed step-by-step instructions, as well as related information with useful tips.
A do-it-yourself metal cutting machine will allow you to obtain equipment that is ideally suited to the owner’s needs
Disc cutting machines are tools whose design is based on a special platform or frame made of metal. The machine itself is equipped with parts that ensure reliable fixation of the material in a certain position at the required angle during the cutting process.
A disk made of high-speed steel is used as a cutting element in such structures. It is also called carbide. A wheel coated with an abrasive material can also be used for cutting metal. The cutting element is driven by an electric motor with a belt or gear drive.
Note! In low-power versions of the tool, it is possible to use a cutting element mounted directly on the shaft of an electric motor. In other cases, using the disc in this way can be dangerous.
In disk machines, there are three different feeds of the cutting component:
- lower;
- pendulum;
- frontal.
Depending on the number of cutting elements, machines are:
- single-head - only one cutting disk is included in the device package, so if it is necessary to replace the operation, readjustment is carried out cutting edge in accordance with the new task;
- double-head - the design makes it possible to work with two tools at once, thereby increasing efficiency. In such machines, one head is in a fixed position and remains stable, while the second head can move. Double-head designs can carry out work automatically.
Making a disc cutting machine for metal with your own hands: procedure
When manufacturing a machine designed to work with metal, the actions are performed in the following order:
- Protective covers are being prepared that will be installed on the drive belt, as well as the cutting disc.
- The motor is installed. The drive belt acts as a connecting part between the cutting element shaft and the engine.
- A shaft is made on which the drive pulley will be attached, and a cutting disc will be installed. The unit is subject to assembly and subsequent installation on the pendulum. In this case, the role of a pendulum is played by a movable top part structures where the cutting element and motor are located.
- A shaft is made to mount the pendulum.
- The frame for installing the machine is being made. The spark arrester and the workpiece will be attached to it.
- The pendulum is installed on the frame.
- Electrical wiring is being installed.
- A test run of the tool and adjustment of the equipment is carried out.
A disk made of high-speed steel or a circle coated with an abrasive material is used as a cutting element.
Calculation of a pulley for a homemade metal cutting machine
The calculation of the diameter of the pulleys is carried out taking into account the rotational speed of the disk and other parameters. Assuming that the motor power is at least 300 W, the rotational speed of the disk will be at least 3000 rpm, and its diameter will be 40 cm.
Helpful advice! During the process of cutting metal, the nut in the disk fixation area may come loose. To avoid this, it is recommended to place the drive pulleys on the left side, and the disk itself on the shaft on the right.
Typically, discs are marked by the manufacturer, who marks the product with the maximum permissible rotational speed value. In this case, the indicator is 4400 rpm. Therefore, you can select any speed within the range of 3000-4400 rpm.
Data for calculations:
- rotational speed of the motor – 1500 rpm;
- the diameter of the pulley intended for installation on the shaft is 6.5 cm;
- rotational speed of the disk – 3000 rpm.
The calculation is performed in the following sequence:
- Set the length of the shaft around the perimeter. To do this, multiply the number π, which is equal to 3.14, by the diameter size: 3.14 x 6.5 = 20.41 cm (shaft length around the perimeter).
- The resulting value is multiplied by the required number of revolutions: 20.41 x 3000 rpm. = 61230 cm/min.
- The result must be divided by the number of engine revolutions: 61230 cm/min/1500 rpm. = 40.82 cm (perimeter motor pulley length).
- The resulting value is divided by the number π: 40.82 cm/3.14 = 13 cm (required pulley size).
Calculating the length of the belt for a homemade metal cutting machine with your own hands
To perform these calculations you will need the following data:
- drive pulley parameters (radius);
- the distance separating the center points of the pulleys;
- parameters of the driven pulley (radius).
Having 2 pulleys with dimensional parameters of 13 cm and 6.5 cm, you can make the necessary calculations. Since the distance between the centers of these elements can be changed (since it is necessary to bring the belt into a state of tension), a segment 50 cm long will be taken as an example.
First pulley (circumference):
3.14 (number π) x 3.25 cm = 10.20 cm
Second pulley (circumference):
3.14 (π number) x 6.5 cm = 20.41 cm
Drive belt (required length):
20.41 cm + 10.20 cm + 50cm x 2 = 13.06 cm
Helpful advice! To get more exact result, you should make calculations with the maximum and minimum distance between the central points of the pulleys and select the average value.
To make your own machine design for working with metal, you should prepare the necessary tools.
The required set of tools and materials includes:
- welding machine;
- metal corner (steel);
- channel and chain;
- button to turn on/off;
- bearings;
- shaft and electric motor;
- electric drill;
- sheet steel to create a working surface;
- box for placement electrical components machine
Principles of creating a machine for cutting metal
The manufacturing scheme for a homemade machine is subject to certain principles; they must be taken into account before getting down to business:
- It is very important to choose the right gear and install it. The preservation of torque and its correct transmission from the engine to the cutting element (disc) depend on this component;
- availability must be provided. This tool makes work more comfortable and also increases the degree of safety;
- choice optimal angle cutting The acceptable range is 45-90°. In most cases, experts prefer cutting at right angles;
- The diameter of the cutting disc is selected taking into account what materials the master will work with on this machine in the future. The larger the diameter of the cutting element, the easier it will be to cut thick metal;
- When designing and drawing up drawings, indicators such as the dimensions of the future machine and its weight must be taken into account. These values are directly influenced by the materials from which the equipment will be made. The layout of the parts also matters.
Note! When drawing up drawings Special attention attention should be paid to vibration supports that are installed on the legs.
Assembling a metal frame for a cutting machine
After all the tools have been prepared and the drawings have been selected, you can proceed directly to the process of creating the machine. Using, it is necessary to make the frame part of the structure. In accordance with the drawings, which you can draw up yourself or find on the Internet, frame elements are cut out. All of them are connected to each other by welding. First you need to check the size suitability.
A channel is welded to the top of the frame - it will become a guide element and will serve as the basis for further installation of the cutting component on the machine. This channel will become a kind of connecting link between the electric motor and the cutting element. After this, vertically located racks are secured to it using bolts.
It will be necessary to weld the structure of another frame. Dimensional parameters are selected individually, taking into account the dimensions of the electric motor and its features. When choosing an electric motor for a machine, it is better to pay attention to asynchronous type modifications. This type equipment is characterized by increased reliability and durability.
There is one subtlety when choosing a motor. The more powerful the engine, the smoother the drive will move.
Assembling the electrical components for the machine
Installation of equipment involves mounting and connecting the working shaft to the electric motor of the machine. The way in which this can be done is not fundamental. If the drawings contain instructions for performing this procedure, it is better to follow them, since the correct operation and reliability of the tool depends on the quality of installation.
Helpful advice! Some parts that you cannot make yourself can be ordered from a turner. These include flanges for fixation, as well as a pulley.
To fix the motor on a metal frame, it is better to use a bolted connection with nuts. It is recommended to place a box near the engine where the switch and electrical diagram, as well as a remote control for controlling the instrument.
It is better to place the channel, intended for fixing the cutting disc, on a spring. You need to make sure that when you release it, it returns to its original place. To secure the spring, you can take bolts and a clamp.
The electrical component is the most important part of the tool. Be sure to include in the design a starting circuit, as well as a button for emergency shutdown of the machine. It is necessary to achieve such an arrangement of parts in which the electric motor will be connected to electricity through an automatic machine and gearbox, and not directly. A three-way starter will be enough to turn on and fully start the engine. It will also power the shutdown button.
Finally, it is worth taking care of the presence of protective devices that will protect a person during the work process. To do this, you need to make a protective casing. It will prevent sparks and small metal particles from getting into your eyes.
Making a cutting machine from a grinder with your own hands: drawings, technology
The designs of cutting machines made on the basis of an angle grinder are of two types (depending on the placement of the angle grinder).
In the first case, you get a frame on which the angle grinder is very rigidly fixed. Only the disk rises above the working surface, for which there is a special slot in the table. This machine operates on the principle of a circular saw.
Note! When working with such a machine, you have to move the workpiece yourself, which is why the accuracy of the work is lost. In addition, this process can be unsafe, so drawings with a hidden type of placement of an angle grinder are not in high demand.
The second option assumes that the workpiece remains stationary and the cutting element moves. Due to the fact that the grinding machine is located on top of the tabletop, cutting parts does not require much effort.
List of tools and materials for a do-it-yourself grinder cutting machine
At self-production The tool should be taken into account that the accuracy with which it will work largely depends on the stability of the structure. For this reason, the thickness of materials for manufacturing is associated not so much with the requirements for the strength of the machine body, but with the need to ensure the proper level of rigidity.
List of materials:
- profiled pipe with square section(2.5x2.5x0.25 cm);
- sheet steel (sheet thickness 0.4-0.5 cm);
- profiled pipe with rectangular cross-section(4x2x0.25 cm);
- ball bearings – 2 pcs. (No. 203, 204 or 202);
- calibrated rod no more than 10 cm (thickness is selected taking into account the hole on the inner race of the bearing);
- metal rod (diameter 0.8-1 cm);
- fasteners (bolts with nuts, M or M8 thread);
- metal tire (2x0.4 cm).
List of tools:
- angle grinder;
- electric drill (can be replaced with a drilling machine);
- kit ;
- a set of dies designed for forming metal threads;
- welding machine;
- open-end wrenches.
Choosing a suitable cutting tool for a homemade cutting machine from an angle grinder
An angle grinder is the main component of a machine for working with metal. Experts do not recommend using a small tool for these purposes, which has a power of no more than 500-600 W. In such grinders, the cutting discs have a diameter of no more than 12.5 cm. These restrictions are due to the fact that a cutting element with a large diameter is considered universal and very reliable - it is able to cope with cutting thick workpieces.
Helpful advice! Instead of welding, threaded connections can be used to secure parts, but they are less reliable and will not provide the required level of strength.
- Preparation and production of parts for the frame.
- Arrangement of a hinge joint on a pendulum arm.
- Manufacturing a U-shaped bracket with holes for mounting a grinding machine gearbox.
- Making a U-shaped clamp and strip that will fix the angle grinder body to the pendulum.
- Installation of the U-shaped clamp and U-shaped bracket to the cutting tool: by welding or threaded connection All these parts are attached to the console part.
- Pressing bearings into supports.
- Double-sided pressing of bearing units onto the shaft. To increase the strength of the connection, you can tin the axle with a thin layer of tin using a soldering iron.
- Fastening the pendulum with supporting node parts to the edge of the platform (distance from the edge 0.5-0.6 cm) using a welding machine.
- Installation of the grinder and protective casing.
- Installation of the return spring.
After the structure is assembled, it is necessary to perform a test run and check the correct operation of the equipment, as well as the placement of all parts on it. On final stage The groove is adjusted to fit the cutting element, and supports are installed to secure the workpieces.
When finishing is completed, the body of the machine must be covered with a thin layer of enamel. Painting will protect the instrument from damage that rust can cause.