Most often, to work with metal blanks, a person needs a metal bending machine. This is a fairly simple device, but its usefulness cannot be overestimated. In addition, it is quite possible to make it yourself. This will save a significant amount of material resources, but it will also require certain knowledge, skills and, of course, time.

Description

The machine for, as its name implies, is used for the production of bent metal parts. It is worth adding that, in addition to this function, it can also have one additional one - material cutting. Such machines are most often used to produce strips of metal. In addition to these two functions, the presence of such a machine will allow the production of various kinds of profiled metal. The advantage of using a metal bending machine is that it allows you to change the shape of the material at any required angle, but at the same time it does not harm the surface coating or the protective layer of the goods.

Work on the unit

You can work on such a machine not only with steel products, but also with copper, brass, aluminum and iron. If a blank made of any material is characterized by the fact that its thickness is less than 0.8 mm, then its width must necessarily be not less than 40 cm, but not more than 2.5 m. With such dimensions, the height of the shelf (for bending) must be no more than 2 cm. If you want to cut blanks with the same thickness, then it is important that their width is from 80 mm to 40 cm and no more.

Another important condition that must be observed in order to work on a metal bending machine is the absence of defects on the surface of the sheet that will be bent. Compliance with this condition is important so that those parts and samples of products that will be produced on the basis of quality are not inferior to those blanks that are produced on an industrial scale in factories. In order to protect the polymer or paint coating on the material itself, it is recommended to install silicone or rubber pads on the machine.

The design of the machine for bending sheet metal, made by hand

A homemade machine for bending metal products has a rather simple, but very functional design, consisting of several basic elements.

Knife. Since the machine has an additional cutting function, this part is also the main one. It should be installed on movable rollers, and is intended for cutting workpieces. It is important to note here that this element must be made of very strong steel, on the Rockwell scale, the strength level should be about 100. The service life of such a product is quite long, but it will be difficult to sharpen. But this drawback is completely offset by the fact that the knife will allow you to cut a huge number of linear meters of material before it becomes dull. To make it easier to move the rollers, a weighting agent must be installed on them.

Components of the machine

A do-it-yourself metal bending machine must also have several of the following constituent elements:

• The necessary detail is a working beam (table). The purpose of this element is quite clear, it plays the role of a working surface on which the workpiece lies. The width of the beam can be almost any. It is worth noting that if the dimensions are quite large, then the machine for bending metal with your own hands can be turned into a full-fledged workbench. Masters recommend making or covering the surface of the beam with rubber or silicone so as not to scratch the surface of the workpieces.
• Next comes the sheet bender itself. The design is quite simple and should be made in the form of a frame made of wood material, and also have a weighting agent.
• It is necessary to acquire various supports and stops that will prevent the material from sliding.
• Another important element is the sheet fold stops. These details will adjust the fold width of the sheet and set the fold angle.
• In order to cut blanks, it is recommended to add stops to indicate the width of the cut.

The beginning of the manufacture of a homemade metal bending machine

It is recommended to start work by drawing up a diagram of the unit. It is also necessary to purchase and manufacture all the necessary elements and parts before proceeding with the assembly. The first thing you need to buy is two pieces of channel No. 5 and No. 6 with the same length. Also, these two elements must have a straight edge. These elements are used to prepare the base. Piece No. 5 is used for clamping, and No. 6 for arranging the base. To choose the length of the channels, it is necessary to build on the length of the workpieces with which you plan to work, this parameter must match. Most often, experts recommend taking a length of about half a meter. This is enough to make almost any part that can be useful in everyday life.

Production and assembly of the machine

Further, for the manufacture of a machine for manual bending of metal, it is necessary to make holes on the channel, which is clamping. The number of holes should be from 2 to 4, and their diameter should be equal to 9 mm. The hole closest to the end of the workpiece of the clamping part should be located 3 cm from the edge. Another important point is that the clamping device should be shorter than the base, by about 5-10 cm. A lever handle is best made from materials such as rebar or timber. If a beam is used, then its cross section must be no less than 15 mm, and if a beam is taken, then its dimensions must be at least 50x50. The shape of the lever is recommended to be U-shaped. This element is attached to the corner by welding or bolts.

Final works

After all the previous manipulations have been completed, you can begin to manufacture such an element as cheeks. They are made of rolled steel, and the thickness of the parts should be about 5 mm. It is important that these elements have chamfers, the thickness of which should be equal to 0.6 cm. The length of this section should be from 3 to 3.3 cm. It is important that the ends of the punch are also chamfered with parameters such as 0.5 cm deep and 3 cm length. They must be removed from the punch to allow the axle to be installed. The production of such an element as an axis is carried out from metal rods, whose diameter is 1 cm. The axis is fastened by welding. When installing, it is necessary to ensure that the axis line is parallel to the corner ribs. All this finished structure, together with the punch, is connected using a vice. When combining, it is important to ensure that the free shelf of the corners is located in the same horizontal plane in which the free channel shelf is located.

After that, the assembly work can be considered completed. To check the performance of the machine, it is recommended to take a blank of mild steel with a thickness of up to 1.5 mm. It is worth noting that the price of a purchased metal bending machine can reach up to $ 2000.

Sheet bending process

The design of a home-made machine may also consist of such parts as a frame, a flywheel nut, a bending sheet, a clamp, a pipe, a crimping punch. In order to work on this type of machine, certain knowledge and skills are required. The advantage of using this unit is that it will allow you to keep the metal intact, unlike the same welding.

In the process of bending the metal, the following happens: the outer layers of the metal blank are stretched, but the inner ones, on the contrary, are compressed. It is important that in order to bend a metal workpiece, it is necessary to apply such a force that will be greater than the ultimate elasticity of the material. With the help of metal bending machines, this condition can be achieved. The advantages of the finished product, that is, bent sheets, include the following factors:

• the presence of high strength of the final product;
• the possibility of obtaining a one-piece structure without welds, bolted joints, etc.;
• the possibility of corrosion is excluded, since there is no damage to the metal during the bending process;
• the ability to obtain the desired angle, without creating a weld.

Output

The presence of such equipment at home greatly simplifies the work with metal blanks. However, when using this device, it is extremely important to know and adhere to safety precautions. The price of a do-it-yourself sheet metal bending machine will also be significantly lower than a purchased one. You will have to spend money only on those materials that are not at hand and will have to be bought.

Homemade sheet bender is assembled from simple parts that any locksmith can carve. With the necessary parts, it will take only half a day to make your own manual bending machine. Most of the elements of the bending fixture are made from metal waste. Metal bending devices are in no way inferior to factory ones, but cost almost nothing. Based on the presented drawings, it is possible to make a more powerful analogue that qualitatively performs bending of steel up to 3 mm thick.

Design Description

This model of a metal bending device easily copes with tin, the bends are obtained quite accurately. Painted metal can also be bent.

The base of the machine is welded from channel No. 6 or No. 8. Depending on the length of the future apparatus, the length of the channel is selected. For small work, 50 cm is enough. To bend the iron at an angle exceeding 90 degrees, a clamp is made from the corner. Such bending angles are used in the manufacture of folds.

The clamp is welded: the basis of the design is the corner 50 x 50, reinforced 35 x 35. The thickness of the corner shelves must be at least 5 mm, otherwise the clamp will be too weak. A clamp of such power will cope even with a length of a manual bending device up to 150 cm. The sheet is bent up to 135 degrees, this is enough to form folds. The length of the clamp should be 7 cm less than the base. Fasteners-brackets from a 3 x 3 corner are welded onto the ends. If the bracket is made from a larger corner, the clamp length is reduced by another 2-3 cm. With such dimensions, the spring is freely placed below.

The edges of the clamp are set clearly parallel to the frame, without burrs. Therefore, they are cleaned with a cutter or file, it is convenient to clean the edges with an angle grinder. The cleaning wheel removes protruding burrs and defects.

An opening with a diameter of 0.8 cm is sawn through the center of both brackets. The crimping punch is made from corner No. 5, the length of which is 5–8 millimeters less than the length of the clamp. The handle for the punch is made of a 14 mm metal bar, bent in the form of a bracket, and fixed to the punch. Cheeks are cut out of metal 0.5 cm, sawn through one hole with a diameter of 1 cm in each.

You can further strengthen the knot by cutting a 6 x 7 mm shelf around the edges and a 14 mm hole. Take the rod for the handle a little thinner - 12 mm.

Chamfers 30 x 5 are cut from the edges of the punch at the ends, to which the axes from a 10 mm metal rod will be fixed. The axis of the rod must coincide in direction with the edge of the corner. Near the ends, a 32 x 6 chamfer is made on the lower edge.

Pre-installation

Before you finally weld the structure, it is necessary to set all the parts in the right direction and check the performance of the structure. Therefore, light temporary fasteners are made first. The frame together with the punch is fixed in a vice. The moving part and the frame must form a common horizontal. The cheeks are mounted on the axis and pointwise mounted on the bed. It is convenient to use clamps instead of welding. As soon as the temporary fasteners are ready, the clamps are removed and mobility is checked. If the amplitude of the punch is sufficient, the clamps are tightened and finally boiled.

It is advisable to remove the structure from the vice after the welding has completely cooled down, otherwise it may lead.

Device testing and final fine-tuning

Check the operation of the bending machine on thin pliable metal. The material for bending is installed in the device, the clamp is tightened with clamps. It is necessary to check the correct placement of the cheeks in relation to the frame. To do this, perform several bends and correct if necessary. If the cheeks are installed correctly, they are finally welded to the frame.

Using holes in the clamping brackets, holes are made in the base with a diameter of 8 mm with an M10 thread. The holes already prepared in the clamp are increased to a diameter of 1 cm. Bolts are screwed into the holes in the base (threaded) from the bottom up, the caps are welded.

The clamp is attached to the frame with nuts with obligatory washers. It is more convenient to operate the nuts in the form of handwheels (plumbing). So that during unscrewing the clamp is pressed, springs or rubber shock absorbers are installed on the bolts. Valve springs work well.

As a result of simple operations, an inexpensive, easy-to-operate and reliable machine is obtained. It also has a few small downsides:

• the fastening of the cheeks and the punch is not well thought out. In this node, during operation, the metal interacts with the metal and gradually frays. After a while, the mechanism begins to play. The sheet of metal is not bent clearly enough.

The method of correcting the disadvantage of a manual bending mechanism: the use of bearings in this assembly.

If you plan to bend a large amount of sheet metal, the drawings of the upper clamp will have to be slightly modified; on the presented work, the work is performed quite slowly.

In the original version, the sheet bender easily makes metal boxes 2 mm thick, forms folds, and copes with painted sheets.

You can make a bending machine with your own hands, without using any drawings, from scrap metal. There are specimens up to 2.5 m long, which perform up to 350 m of ferrous metal bending per day. Professional tinsmiths often prefer a homemade factory-designed bender.

More complex, manual roller benders can also be made independently according to the drawing. It is important here that the weight of the device is not too large, because it is controlled with one hand. Roller structures have one drawback - during rolling, small sections of sheet metal can be deformed. A bend is formed by stretching the surface. Therefore, most tinsmiths prefer not to work with them.

A few more models of manual bending machines with a detailed description of the nodes in the videos:

In the process of building a house or a summer residence, it often becomes necessary to equip drains, sewers, metal frames.

In the manufacture of such products, it is necessary to give a flat workpiece the necessary spatial shape. The advice of experienced craftsmen on how to bend a sheet of metal at home will allow you to make good quality structures that will last a long time.

Bending of metal is performed without welding seams, which allows avoiding corrosion in the future and obtaining a product of increased strength. Deformation does not require significant effort and is usually performed in a cold state.

The exception is hard materials like duralumin or carbon steels. Sheet metal bending technology is developed in accordance with the tasks set in such options as:

• radius,
• multi-angle,
• single-angle,
• p-shaped.

A separate case is flexion with stretching. This technology is used in the manufacture of parts with large bending radii, small diameter. When making parts with your own hands, the process is combined with operations such as cutting or punching.

Soft types of metals and alloys, such as brass, copper, aluminum, are well suited for home processing. The production of products by bending is carried out on rolling or roller machines, or manually.

The last procedure is quite laborious. Bending is done with pliers and a rubber mallet. If the sheet is thin, use a mallet.

How to bend at right angles

To bend a staple from a metal sheet, you will need a set of tools and fixtures, consisting of:

• vise,
• hammer,
• electric saws,
• bar,
• frames.

The length of the strip is made according to the scheme, with the expectation that for each bend there should be a margin of 0.5 mm, plus another millimeter for bends on both sides. The workpiece is placed in a vise with squares. Clamping it along the fold line, it is processed with a hammer.

After that, the future bracket is unfolded in a vice, clamped with a frame and a bar, and the other side is formed. The workpiece is pulled out, the required length of the sides is measured, making bends along the bottom.

A triangle checks the correctness of the angle, correcting inaccuracies with a hammer. When performing both operations, the workpiece is pressed with a bar and a frame. The finished staple is sawn to the desired size.

How to make a bending machine yourself

To give the metal the desired configuration, tinsmiths use a sheet bender. But what about a master who does not have special equipment at hand?

In fact, the question of how to bend sheet metal at home is easily solved. It is enough to use your own ingenuity and elementary devices to make a simple machine.

To make a bender for a metal profile, you will need:

• I-beam 80 mm,
• fasteners (bolts),
• loops,
• corner 80 mm,
• clamps,
• pair of handles.

You will also need a stable table on which the finished machine is fixed.

The basis of the device is an I-beam, to which a corner is screwed with two bolts, holding the workpiece in the process of bending. Three door hinges are attached under it by welding. The second part is welded directly to the corner.

To make the machine turn easily during sheet metal bending, handles are attached to it on both sides. With clamps, the finished machine is attached to the table. Before laying the workpiece, the corner is unscrewed or lifted. The sheet is pressed, aligned along the edge and bent by turning the machine by the handles. A homemade device is only suitable for processing workpieces of small thickness.

Bending a metal sheet with a hammer

In order to bend a sheet up to 1.2 mm thick at a right angle, use the simplest tools - pliers (clamps) and a rubber hammer.

Processing is carried out on a flat wooden block. The fold line is drawn with a pencil and a ruler. Then the sheet is clamped with pliers so that their ends fall exactly on the marking line.

The edge is gradually folded up, moving along the fold. After the angle approaches 90 degrees, the sheet is placed on a bar and finally leveled with a hammer.

In this way, narrow parts are produced, such as sheet metal edges.

Tip: A rubber or wooden mallet is used to prevent dents from forming on the metal. If bending is performed with a conventional tool, a textolite plate should be taken as a gasket.

It is convenient to bend a sheet up to 2 mm thick on the desktop. The metal is positioned so that the marking line falls on the edge. A steel corner is placed under the material to be processed.

The sheet is clamped in a vice with two wooden bars. Bending is done with a hammer, tapping the metal from one end to the other. At the same time, the edge of the sheet is directed down so that in the end it completely lies on the corner fixed along the edge of the table. In this way, products of any width are made, including boxes or barbecues.

Making a pipe without using a machine

Home craftsmen have invented a lot of ways to bend a metal sheet into a pipe without using a machine.

We propose to consider the simplest option using a blank of a suitable size. It is made from an old pipe of a suitable diameter.

A sheet of metal is laid out on the floor, a piece of the desired length is cut off from it. To determine the correct size, the required pipe diameter is multiplied by 3.14 and added 30 mm per seam.

A pair of tubes is welded to the blank on both sides perpendicular to one another. Scrap should be freely inserted into their holes.

To use the device, the efforts of three people will be required. The blank is placed on the edge of the sheet. One person stands on top, two others wind the metal onto the blank, turning the crowbar 90 degrees.

Making a bending machine with your own hands is sometimes much more profitable than buying a ready-made mechanism. So you will save financially, get exactly the machine that will meet your requirements.

When planning to make a bending machine with your own hands, you must adhere to a certain principle - the entire load when working with a manual device should fall on the strongest muscles. And the recoil of the unit is to press your feet to the floor. So the process of working on the machine will select a minimum of physical strength.

Using a roller or simple sheet bender, you can make an unusual roof pattern, make some additional elements, and create entire structures. It all depends on what type of machine you are going to do with your own hands.

1. Roller devices are the most compact benders. They are often used when installing seam roofing. Roller machines provide the production of bypasses, additional elements, non-standard type roof patterns, increase the rolling depth from the inside of the seam roof, etc.
2. Machines that bend sheets at an angle of 90 degrees. Such devices are the most popular among those who decide to make a bending machine on their own.
3. Press. Trying to make such a unit with your own hands is almost pointless. These are machines for industrial use, the assembly of which should only be carried out by professionals.
4. Stretch sheet benders. Here, the radius of the bends directly depends on how the rolls are arranged. Such devices are multifunctional, but there is no objective need for their availability for domestic use.

From this we can conclude that the most attractive sheet benders for self-manufacturing are those that provide a bend at an angle of 90 degrees. With their help, you can perform minor repairs, correct irregularities on metal products, make some crafts, etc.

Buy or make

Making a bending machine with your own hands is a task that requires certain skills and free time. It is the need to spend their time that makes many give preference to purchased machines, despite the abundantly presented schemes, drawings of machine tools on the net.

But how to do the right thing - buy or make your own bending machine?

1. To create a homemade sheet bender, you will need a minimum of tools and materials.
2. The main cost of creating a sheet bender is temporary. Many machines are assembled from improvised parts, so you rarely have to spend money.
3. Not infrequently, factory machines turn out to be less efficient and convenient to use than a home-made bending machine.
4. A large number of ready-made machines are designed for bending sheets up to 3 meters wide. This is too large a device, even for those who have a spacious yard or a large garage.
5. Question price. Comparing the cost of a home-made manual bending machine and a ready-made machine, you will be pleasantly surprised how seriously you can save money by spending just a couple of hours on making a home-made bending machine.
6. Many factory machines have a mechanical type of drive. But it is completely inconvenient if you need to carry out thin, accurate work with metal sheets. Plus, for their work, you will need to connect to the mains, additional costs for paying for electricity.
7. There are models with hydraulic drive, which are more convenient and preferred for home use. They allow you to delicately work with blanks. But the price of a hydraulic machine is impressive, the design itself is quite complicated. Even if you regularly plan to bend sheets, the payback period of this machine will be too long.
8. The best option is a manual drive. Here you control the effort, distribute it over the workpiece. Manual sheet bending machines are very easy to operate, and they cope with their tasks no worse than mechanical and hydraulic analogues.

But the most important question is your real need for such a machine. If you need a bender for a one-time use, it's easier to borrow from a neighbor, or pick up a simple mallet.

For those who plan to actively use a bending machine, we will tell you how to make a bending machine without resorting to complex structures.

Assembly of the bending machine

Finding drawings of a sheet bender is not a problem. Therefore, first of all, think about what dimensions of the machine you are supposed to need, for what purposes you are going to use this tool.

Each drawing provides a detailed description of the assembly process. Complete the video drawing with a manual, which will allow you to make a full-fledged compact bending machine in just an hour.

In our case, we will consider a drawing of a machine designed for minor repairs in our own garage.

The drawing includes several basic structural elements of the sheet bender:

• clamp;
• Crimp punch;
• Lever handle;
• Base.

The material for the manufacture of the machine can be metal. Although not one drawing provides for the use of an ordinary tree for these purposes. Wood as the basis for creating a sheet bender allows you to carry out minor work when you need to bend small sheets of iron, aluminum and other materials.

1. The wooden base can be left in its original form, or strengthened with metal corners, sheet metal. Based on the strength of the selected tree, as well as the expected loads on the base.
2. Fasten several strong loops that will be responsible for the movement of the bending link of the sheet bender.
3. If the bending link has an impressive size and weight, there is no need to install an additional frame. Its installation allows you to increase the pressure generated when bending metal sheets.
4. The crimping punch is a structural element of the machine that matches the profile of the die used. The punch acts as a closing component that forms the product from above. The punch is used for stamping, marking or pressing.
5. The punch should be secured to the wooden base using wing nuts. Be sure to install washers under them.
6. If you plan to bend sheets of various parameters on the machine, it is better to make several different punches at once, differing in the thickness of the grooves.
7. In order to obtain a good 90 degree bend on this simple machine, it is recommended that the surface limiting the span of the bending component be made with a slight inclination. Literally 5 degrees will be enough. Otherwise, problems may arise when obtaining a right bend angle.
8. If you notice at the first bends that the result of processing the sheets is not very accurate, try making guide cuts at the bends.

Some require bending of larger parts, metal sheets. For these purposes, the design of the sheet bender presented above will not be powerful enough.

Self-produced sheet bender, designed to work with large sheets, has an identical design. Only differs in large size and other materials for its manufacture. Use channels and corners, and weld the connections.

Bending machines are indispensable hand tools for many homeowners. They are easy to make with your own hands, and their scope is limited only by your needs and imagination.

Getting the tool ready is half the battle. This truth is good if the master has a ready tool. However, if in the course of work you suddenly need something more complicated than a screwdriver and a hammer, then you often have to invent real machines on the go to perform complex functions. A striking example of such a machine is a sheet bender necessary when working with sheets of metal.

During the implementation of many works with sheet metal, for example, in roofing, it often becomes necessary to bend sheets of metal, including those with different coatings. If necessary, bend a small sheet, this work can be done using hammers, mallets, pliers.

The result will be deplorable - a curved, jagged surface, a scratched coating, a crooked fold line will not allow you to do all the work efficiently, and will not deliver aesthetic pleasure to the owner. A sheet of large sizes and, moreover, of a complex shape, cannot be bent at all with such tools.

For such work, it is necessary to use rather complex equipment - a sheet bender. You can buy a ready-made manual machine, like the one shown in the photo, produced by a well-known manufacturer. However, this will entail additional, very significant, costs, which will lead to an increase in the cost of all work. A cheaper way to purchase such a machine is to make a homemade sheet bender with your own hands. For a person familiar with physical labor, who knows how to handle other tools, this will not be a particular problem.

Device

It will be problematic even for a person who is well acquainted with the basics of strength of materials to independently invent such a machine. However, in the era of the Internet, no one needs invention in this area - drawings and a description of how to make a bending machine with your own hands can be easily found on the relevant sites.

The main details of the sheet bender shown in the drawing are:

• The base is a surface designed to install the rest of the equipment and fasten the workpiece. Made from steel channel. Dimensions are selected depending on the dimensions of the metal sheets, the processing of which is planned;
• Clamp - a device that allows you to bend the sheet. In a conventional device, the bend angle does not exceed 90 degrees. It is made from a steel corner, mounted on the frame with the top up. For ease of installation, another of the same corner is welded to it, as shown in the drawing. The length of the clamp should be slightly less than the length of the base, to ensure its secure fastening and smooth operation. Fastened to the base with clamping bolts;
• Crimping punch - a design made of a steel corner with a metal handle welded to it, which allows bending the sheet. The axis of the punch must coincide with the edge of the corner. A steel rod is used as an axis.

The dimensions of the parts indicated in the drawing may vary, depending on the application of the machine.

Assembly

The assembly of a home-made sheet bender shown in the video begins with fixing the base and punch with a clamp. In this case, it is necessary to ensure that the surface of the base and the working surface of the punch are in the same plane. The axis of the punch is threaded into the holes of metal plates, called cheeks, welded to the ends of the base. The axis is attached to the cheeks by welding or screwed with nuts.

The exact position of the clamp is determined after several trial folds. Having drilled holes in the base, we attach the clamp to the base with the help of clamping bolts. The nut for fastening the bolts is welded to the base, which makes it easy to install or remove the clamp if necessary, using only one nut on each bolt, which can be replaced with a wrench.

Work

Thus, the drawings of a manual bending machine with your own hands allow you to assemble a device whose operation is shown in the video. The order of work is as follows:

1. The punch is brought to a position in which its working surface is installed in the same plane with the surface of the base. The punch handle in this position is directed vertically down;
2. The clamp is removed from the base;
3. A blank is laid on the base - a metal sheet, the width of which corresponds to the distance between the clamping bolts;
4. The clamp is installed on the base and secured with clamping bolts;
5. With the help of the handle, the punch is set in motion and firmly presses the sheet against the clamp. In this case, the sheet is bent at the desired angle around the axis of the punch. The handle is in a position at an angle of 45 degrees relative to the surface of the base.

The result is a sheet of metal with an even fold line.

Applications and benefits

A manual bending machine is used when it is necessary to carry out any work related to bending metal sheets: the manufacture of metal casings, cases, decorative work. It is good to have such a device in the country, in the garage. It may be needed by a private entrepreneur involved in the processing of metals and the manufacture of metal products in small quantities.

The main advantage of such a machine is its mobility, small size, relative simplicity of device and assembly. The indisputable advantage is the possibility of its use in the absence of electricity. Such a device allows you to qualitatively bend any sheet of metal that is suitable in size, while maintaining the evenness of its surface without damaging the sheet coating, if any.

disadvantages

With all the advantages, a home-made sheet bender also has disadvantages, which are, first of all, in safety. The manufacture of such a device requires the use of welding equipment, the handling of which requires certain skills and compliance with safety requirements. Poor-quality welding can not only lead to a fire during its implementation, but also cause poor-quality operation of the device itself.