Canister welding kit box. Canister Welding Kit Box Homemade Welding Machine

Hello readers of this site. Today I will tell you how I made a convenient box for transporting a welding machine from a plastic canister.

Most of the time I live in a city apartment. In the basement under the nine-story building, I have a workshop, where I do my hobby - homemade products. There I can do everything except welding - firstly, there is a 10-ampere automatic machine installed in the electrical panel, which can knock out when the electrode sticks (And the electrician has the key to the shield). Secondly - Fire safety! And thirdly (and most importantly) ventilation there does not allow welding.

And therefore, in order to perform welding work, I go to the country, or to a private house. And since I'm always running out of time, most often, after work, I jump into the basement, grab everything I need, and go ....

I use this welding inverter "Gerard-MMA200".

He has served me faithfully for many years. I kept it in my "native" box. But the trouble with all factory packaging, as you know, is that once you take out its contents, it is almost impossible to put everything back in!)))). Fortunately, a "souvenir" welder's shield was supplied with the device! Without it, the device easily fit .... But only he!

And so, I arrived at the cottage. I lay out the tool in anticipation of interesting work ....
...... And then it turns out that I forgot the mask!!!...

Another time I took both the mask and welding .... but forgot the electrodes ...
Next time - took everything except cutting wheels...))))).

These are the events that gave rise to the idea in me to make a kind of box, where the whole set would fit - a welding machine, a mask, wires, electrodes, clamps, a hammer .... In short, to grab one box, throw it into the car - and not forget anything!) ))))

And I began to think of what I could make such a thing! My choice fell on just such a 30-liter canister, of which I have quite a lot:

Having estimated, I came to the conclusion that such a volume is exactly what I need. (To be honest, it was not this canister that went under the knife. I just forgot to take a picture of the one I cut.))))

As a result, I got a box, which you can see in this video (it was filmed "crookedly, but, I'm sorry):

And now I will tell you in detail how I did it.

I needed:
1. Plastic canister 30 l.
2. Blind rivets with a diameter of 4.8 mm of different lengths.
3. Loops 2 pcs.
4. Chest latches 2 pcs.
5. Strips of tin.
6. PVC pipe cuttings.
7. A piece of linoleum.
6. Washers M5 enlarged.

So, let's begin...
At first I wanted to do a horizontal layout. But, on reflection, I came to the conclusion that, firstly, I will significantly lose in the rigidity of the structure, and secondly, I am still going to wear it by the handle (i.e., vertically), and therefore, it will be better if the instrument is laid will be made in the same position.

So I took the canister and cut off the top of it:

I had such scraps of tin.

These are just strips with a folded edge. Remained from something, I don't remember. If necessary, they could be easily cut and bent.

I took a narrower strip and riveted the edge of the cut off upper part with it, using a regular riveter and pop rivets. At the same time, I slightly pushed the double-curved edge of the tin over the cut:

At the same time, I inserted the rivets from the outside, but from the inside, since there were no metal surface, put M5 washers on them:

Next, I wanted to do the same with the bottom of the canister, but ran into an unexpected problem. The stress of the wall material was released during cutting, and changed the geometry of the lower, less rigid part. And when I put exactly the front, the back did not fit far:

Therefore, I first made a "forging" blank, using the top cover as a template, and bending the desired perimeter of the lower part along it:

Then I put it inside, forming the perimeter geometry:

And then I put a narrower strip on the outside (such as I used on the lid) and riveted them together with rivets:

Next, you need to connect the lid to the canister. Digging through my storerooms, I found these loops:

Then I shortened them with a grinder:

The drill increased the diameter of the holes to 5 mm.

And screwed-riveted in place:

As locks, I decided to use the so-called chest latches.

I always have them in stock, because they cost a penny, and in many places they can come in handy. Here is one example of using them to repair an old punch case:

So in my homemade they came in handy:

Well ... Let's start creating the "insides" ....
I took a piece PVC pipes s with a diameter of 32 mm:

I cut off four pieces, cut the edges obliquely and drilled holes for the rivets:

Then I riveted them to the side wall inside the canister. I laid the rivets from the inside, again put washers on them from the outside:

Now it is convenient to store a supply of electrodes of different diameters in them (at the time of shooting, it turned out that "two and a half" were over! Only "two" and "three" were available ... Now I have already bought it)))))) :

The hammer was also placed there:

By the way, the hammer is also homemade. Especially for welding, he built it from a piece of round timber and a cut water pipe. And heavy enough, and the handle will not light up ....

Next, I proceeded to build a pocket for grinders. I cut out a piece of linoleum in this shape:

The edges are "forged" with tin:

Then I riveted the bottom edge first:

The craftsman made a tool box that is quite convenient for use in the workshop and transportation. Today's homemade products cannot be called fully artisanal. This is a canister, more precisely, a box, a box for a welding machine. Fasteners, loops at the back. I took it, cut it, what's inside? The master lives in a city apartment and is engaged in homemade products in the basement. Can do everything except welding. To fulfill them, he usually goes to the dacha or to a private house. Here, I ran into difficulties. Lack of time, so dropping in in the evening after work, we collect everything we need. So I decided to make a box that included everything. Made it from a canister. There were several canisters, I cut one of them, riveted it with tin cans to stiffen it. Above and below - double, that is, from the inside I put a tin. Through locks (bought at a furniture fittings store, screed - collapsible table connects, costs a penny) opens. Inside there is a chameleon welding mask, there are wires in it. Let's start with what? Bulgarian. We often forget, so a few. One of them settled in a canister. Side pocket made of linoleum, in it required amount disks. Circles need cutting, emery-petal, cleaning. It's with you. I fastened a tape measure to the pocket. Welding, invector. I made several fasteners inside the PVC pipe box. You can put electrodes in them. different types and a welding hammer. I cut a piece of round timber, sharpened it, welded a piece of a water pipe.

Now it’s more convenient to go somewhere, cook something. We jump home, change clothes, throw a canister, food, apparatus and everything else at hand into the trunk and nothing is forgotten.

izobreteniya.net

Organizer for welding machine

pogranec 17-12-2017, 10:09 11 743 Fixtures

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Those who use a welding machine know how inconvenient it is to store and carry it because of the wires. The DIY master decided to make an organizer for a welder. Below we consider what came of it and what he used for this

Tools and materials:

Welding machine; - Metal strip; - Drilling machine; - angle grinder; - Metal corner; - Metal rod; - Bending machine; - Vise; - Clamp; - Tape measure; Step One: Hooks Mark out a 3*30mm metal strip. Drills 8mm hole. Cuts off plates. Cuts four bars from 8 mm rebar. Inserts them into the holes in the plate and scalds. Bends the edges of the plates at 45 degrees. From the reinforcement, he makes two more hooks with an angle of 90 degrees. Cuts two strips, drills a hole and welds hooks. Makes another semicircular plate for a magnet.











Step two: frame The master made the upper part of the frame from a 10 mm metal rod. Cuts two rods and bends them in a U-shape.

The master makes the lower supporting part from a 30 mm corner and a strip. Cut off two corners. From the ends welds the strip. And on one side there is a strip with a hook.

Welds a U-frame to the bottom. Welds on one U-shaped frame, in its middle part, a plate with a hook. It turned out a hook from the bottom and top of the frame, the power cord will be wound around it.



Welds hooks on the sides of the frame, welding cables will be wound on them. Welds an eye for a magnet.


Step three: painting and assembly Cleans the seams, paints the surface.
Makes a plastic fork holder.
It fastens the holder to the eye on one side, and the magnet on the other.
Set up a welding machine. Wraps around cable hooks. Fixes the tube for electrodes in the upper part.


The organizer is ready.


The entire manufacturing process can be seen on the video.

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usamodelkina.ru

Inverters for those who will cook "four"

The advantages of inverters are indisputable: a light weight, compact body, simple operation. Only the price can keep you from buying. But in skillful hands, the inverter will not only pay off over time, but will also be able to make a profit. Knowing all this, you finally decided to buy it. Naturally, you want to be sure that you are not wasting your money. After all, the welding machine must cope with the tasks assigned to it and serve properly for many years.

Home master

Let's get acquainted with one of the most popular devices in Russia, which is used for domestic use. Telwin Force 165 is produced by a well-known Italian company specializing in the production of welding equipment.

Protection against overheating, low voltage and overcurrent guarantees a long service life. Let's pay attention to the "CE" sign. This is a safety certificate that should be on any product sold in Western Europe. For the future owner of the Telwin Force 165 inverter, it guarantees protection against electromagnetic radiation. Even if you have never thought about the invisible threat of the fields, you must admit that it is not bad that the manufacturer himself took care of you.

Having tested the inverter in operation, you will be convinced that both at low and at high currents, it welds metal well. It has a full range of functions: hot start, arc force, anti-stick. Everything works as well as on more expensive models.

It is worth paying attention to the configuration of the inverter. Along with it, you will receive a mask, wires, terminals, an electrode holder, a slag removal brush and a case in which it is convenient to store and carry all this.

Expert comment

Unfortunately, the welder's mask in this set is not the best, it is made in the form of a shield with a removable handle. If you don't like it, you can buy another one over time. The main thing is the quality of the inverter itself, and Telwin has it on high level.

Note that this device, like the other models presented in the review, works perfectly from a motor generator. With your diesel or petrol power plant, you can use welding where there is no mains power.

Profitable offer

Now let's get acquainted with a wonderful set, which includes a Fubag IN 160 welding inverter and a chameleon mask. A good semi-professional welding machine allows you to appreciate all the advantages of inverter technology. Due to the increase in current during the start, the arc is easily ignited. An anti-sticking function is provided, which prevents the electrode from sticking. If it still happens, she helps to tear it off.

If you want to purchase a chameleon mask, then buying it in this set, you save up to half of its cost.

2 more inverters that are sold in profitable kits - Elitech AIS 160. The first option is also with a "chameleon" mask, the second - Elitech AIS 160САР - with a carrying case, a welding shield, thick cables 3 m long, an electrode holder, a ground clamp and a brush -hammer.

October 8, 2018
Specialization: master in the construction of plasterboard structures, finishing work and styling floor coverings. Installation of door and window blocks, facade finishing, installation of electrics, plumbing and heating - I can give detailed advice on all types of work.

I use a welding machine quite often, so I decided to collect simple design made of metal, which will allow you to carry and store equipment with maximum convenience. The frame serves as additional protection against damage, and the side tabs are ideal for winding the cable so that it does not dangle.

Gather materials and tools

I used the following to work:

• Angle grinder for discs with a diameter of 125 mm.
• Several cutting discs for steel 1 mm thick.
• Grinding disc to the grinder to align the welds.
• A welding machine with which all parts are connected together.
• Drilling machine, instead of it you can use an electric drill.
• Pipe bender.

The following materials were used:

• Steel rod with a diameter of 10 mm.
• Steel strip 3x30 mm.
• Corner 30x30 mm 3 mm thick.
• Steel rod with a diameter of 8 mm.
• Magnet, piece of plastic, some M6 screws.

Making cable holders

The sequence of work is as follows:

• I cut off pieces from a steel strip for holders, the size is chosen arbitrarily.
• In the middle I drill a hole with a diameter of 8 mm, a steel rod with a diameter of 8 mm will subsequently be inserted and welded into it.
• From a rod with a diameter of 8 mm I bend two corners, they will be used as holders for the power cable.
• I cut off the curved elements, my length of both sides was 30 mm.
• I cut four pieces of the rod 8 mm long 30 mm. They are carefully inserted into pre-prepared plates and welded.
• I process the surface with a grinding wheel to level it to perfect condition. I round the corners and slightly bend the ends.

Preparing elements for the frame

Now you need to make blanks for the frame of the structure:

• To begin with, I bend two U-shaped blanks from a rod with a diameter of 10 mm. Their length depends on the model of your device, so it makes no sense to give exact dimensions.
• From the corner I cut off two blanks for the lower part of the frame. The length is selected individually.
• From the strip I cut off three elements along the width of the future design.
• In two strips, previously cut off, I drill holes in the middle with a diameter of 8 mm.
• I insert previously bent elements into the holes and weld it, this will be a holder for the power cable.

I assemble the structure

The assembly process is carried out in the following sequence:

• One of the lower plates is precisely and neatly aligned with the corner and is tacked at 1-2 points.
• Another flat plate is attached from the second side, after which the second corner is placed and the base is welded, do not forget to control the geometry of the product.
• Welding points are immediately carefully processed to perfect smoothness.
• The first curved blank is exposed. It is important to place it correctly, the lower ends will serve as legs, so the distance from the edge is selected so that the welding machine fits inside.
• The second element is set in exactly the same way, after which everything is welded along the entire joint.
• Cable holders and a handle in the upper part are welded, I also placed a special element for attaching the container with electrodes, but this is not necessary.

I paint and finish the design

We complete the assembly and perform the following work:

• All joints and welds are once again inspected, if necessary, they are processed with a grinding disc to perfect smoothness so that everything is safe.
• Metal elements are first primed and then painted. The easiest way to use the compositions in aerosol cans, it is convenient to work with them and the surface dries very quickly.
• On the side where the power cable is located, I fixed a nylon plug holder, just took a piece right size and drilled two holes in it for the size of the plug, it turned out very convenient.
• I attached a magnet to the inside of the holder for the plug, it is very convenient in that a welding hammer is fixed on it, which will always be at hand and at the same time it will not be difficult to take it during operation and you do not have to disconnect or unscrew anything.
• I also made a tube for electrodes, for this I took pieces of stainless steel pipes and made the design shown in the photo above. Two hooks are welded on the tube to hang it on the handle and carry it along with the device. If you, like me, do a lot of outdoor work, then the tube will help keep the electrodes dry in any weather.
• All elements are inserted, and the design is ready for use. Now it is easy to carry or transport in a car, everything you need is collected in one place.

Tuomas Soikkeli shared his experience from instructables.com

October 8, 2018

If you want to express gratitude, add a clarification or objection, ask the author something - add a comment or say thanks!

The welding inverter has become an indispensable attribute of a professional welder or an amateur. With the help of welding equipment, metal is soldered or cut, and the case for the welding inverter is designed to store the main components and components designed to work with metal surfaces. For those who are constantly involved in welding, the priority quality of the work will be the convenient location and placement of the main parts and components that are intended for welding.

Features of industrial cases

The industry produces several options for boxes for a welding inverter, but most equipment users believe that making a case with their own hands would be a great option. By the way, some do-it-yourself cases for a welding inverter have become the basis for industrial production, which have gained popularity among welding specialists.

Industrial series have convenient compartments and sections for storing tools and other auxiliary components and parts. As a successful example of industrial production, you can specify the FIT case 18″ series, which has the following parameters:

• External overall size - 450*240*200 mm.
• Inner part case - 440 (390 mm inner working part) * 225 * 180 mm.

The side handles that are used in this design allow the use of a usable volume of only 390 mm. The height of this design is 180 mm, and the size of 145 mm is reserved for the direct construction of the box, and 35 mm belongs exclusively to the closed part of the body in the form of a lid. The weight of this design is about 2.5 kg. As practical experience shows, this option is perfectly used as a case for the Resant, Torus, etc. welding inverter. Many consider the lack of the possibility of a full-fledged placement of wires and cables provided for the design of inverter welding equipment to be the only drawback.

In any case, for some models, it is still possible to “squeeze” cables, holders, and wires into the box structure. The inside of the lid has a special recess that allows you to accommodate a pack of electrodes and the necessary minimum of protective equipment.

Unlike home-made options that have to be made from handy materials, the welding inverter inside the case will not “hang out”, but tightly holds the main body of the inverter equipment. An additional advantage of serial production of a case for a Paton welding inverter will be a special varnish coating that will not change its appearance regardless of the state of the main welding inverter equipment.

Benefits of Industrial Designs

Given that welding work is classified as complex and responsible, the availability of additional accessories and items designed for mobile transportation or long-term storage plays an important role in this. The advantages of industrial designs are as follows:

• The front part of the box body, the bottom and the back wall are made of a metal base.
• The side walls, as well as the closed part of the top in the form of a lid, are made of impact-resistant plastic with a corresponding lacquer coating.
• The service life is at least 5 years.
• The movable mechanism of the tray, as well as the built-in organizer components, are used to accommodate the main accessories and additional parts of the inverter equipment.
• Universal and strong locks made of chrome-plated metal give not only aesthetics, but also reliably protect the drawer from deliberate opening.

An industrial case is more expensive than a box for a do-it-yourself welding inverter, but at the same time, you can use this device as a full-fledged working tool for storing and carrying a welding inverter.

Features of self-assembly of a case for a welding inverter

To assemble a box for a welder on your own, you need to have minimal knowledge in the field of mathematics, in particular geometry, in order to properly cut the structure and make a useful accessory for temporary storage of inverter equipment.

The craftsman made a tool box that is quite convenient for use in the workshop and transportation. Today's homemade products cannot be called fully artisanal. This is a canister, more precisely, a box, a box for a welding machine. Fasteners, loops at the back. I took it, cut it, what's inside?
The master lives in a city apartment and is engaged in homemade products in the basement. Can do everything except welding. To fulfill them, he usually goes to the dacha or to a private house. Here, I ran into difficulties.
Lack of time, so dropping in in the evening after work, we collect everything we need. So I decided to make a box that included everything. Made it from a canister. There were several canisters, I cut one of them, riveted it with tin cans to stiffen it. Above and below - double, that is, from the inside I put a tin. By means of locks (bought at a furniture fittings store, a screed - a collapsible table is connected, it costs a penny) opens.
Inside there is a chameleon welding mask, there are wires in it. Let's start with what? Bulgarian. We often forget, so a few. One of them settled in a canister. Linoleum pocket on the side, it contains the required number of disks. Circles need cutting, emery-petal, cleaning. It's with you. I fastened a tape measure to the pocket. Welding, invector.
I made several fasteners inside the PVC pipe box. You can put different types of electrodes and a welding hammer in them. I cut a piece of round timber, sharpened it, welded a piece of a water pipe.
Now it’s more convenient to go somewhere, cook something. We jump home, change clothes, throw a canister, food, apparatus and everything else at hand into the trunk and nothing is forgotten.

Due to their mobility, inverter welding machines are widely used in everyday life and in production. They have huge advantages compared to welding transformer units for welding work. Everyone should know the principle of operation, the device and their typical malfunctions. Not everyone has the opportunity to purchase a welding inverter, so radio amateurs post their own welding inverter circuits on the Internet.

General information

Transformer welding machines are relatively inexpensive and easy to repair due to their simple device. However, they are heavy and sensitive to supply voltage (U). At low U, it is impossible to perform work, since significant changes in U occur, as a result of which they can fail Appliances. In the private sector, there are often problems with power lines, since in the former CIS countries, most power lines require cable replacement.

An electrical cable consists of strands that often oxidize. As a result of this oxidation, there is an increase in the resistance (R) of this twist. With a significant load, they heat up, and this can lead to an overload of power lines and transformer substation. If you connect an old-style welding machine to an electricity meter, then at low U, protection will work (“knock out” machines). Some try to connect a welder to an electricity meter, breaking the law.

Such a violation is punishable by a fine: electricity consumption occurs illegally and in large quantities. In order to make work more comfortable - do not depend on U, do not lift weights, do not overload power lines and do not break the law - you need to use an inverter-type welding machine.

Device and principle of operation

The welding inverter is designed in such a way that it is suitable for both home use and enterprise work. It is capable of ensuring stable combustion of the welding arc with small dimensions and even using a welding current that is significantly higher than that of an ordinary welding machine. It uses high-frequency current to generate a welding arc and is an ordinary switching power supply (the same as a computer one, only with a higher current strength), which makes the welding machine circuit simple.

The basic principles of its operation are as follows: rectification of the input voltage; converting the rectified U into a high-frequency alternating current using transistor switches and further rectifying the alternating U into a high-frequency direct current (Figure 1).

Figure 1 - Schematic arrangement of an inverter type welder.

When using high-power key transistors, a direct current is converted, which is rectified using a diode bridge into a high-frequency current (30..90 kHz), which makes it possible to reduce the dimensions of the transformer. A diode rectifier only allows current to flow in one direction. There is a "cut-off" of the negative harmonics of the sinusoid.

But at the output of the rectifier, a constant U with a pulsating component is obtained. To convert it into a valid direct current in order to correctly operate key transistors operating only from direct current, a capacitor filter is used. A capacitor filter is one or more high-capacity capacitors that can noticeably smooth out ripples.

The diode bridge and filter make up the power supply for the inverter circuit. The input of the inverter circuit is made on key transistors that convert the constant U into a high-frequency variable (40..90 kHz). This conversion is needed to power a pulse transformer, at the output of which a low-U high-frequency current is obtained. A high-frequency rectifier is powered from the transformer outputs, and a high-frequency direct current is generated at the output.

The device is not very complicated, and any welding inverter can be repaired. In addition, there are many schemes by which you can make a homemade inverter for welding.

Homemade welding machine

It is easy to assemble an inverter for welding, as there are many circuits. It is possible to make welding from a computer power supply, knock down a box for it, but you get a low-power welder. Details on creating a simple inverter from a computer PSU for welding can be found on the Internet. The inverter for welding on a PWM controller such as UC3845 is very popular. The microcircuit is flashed using a programmer, which can only be purchased at a specialized store.

For firmware, you need to know the basics of the C ++ language, in addition, it is possible to download or order a ready-made program code. Before assembly, you need to decide on the main parameters of the welder: the maximum allowable supply current is no more than 35 A. With a welding current equal to 280 A, U of the supply network is 220 V. If we analyze the parameters, we can conclude that this model exceeds some factory models. To assemble the inverter, follow the block diagram in Figure 1.

The power supply circuit is simple, and it is quite simple to assemble it (diagram 1). Before assembling, you need to decide on the transformer and find a suitable case for the inverter. To make a power supply inverter, you need a transformer. .

This transformer is assembled on the basis of a SH7x7 or SH8x8 ferrite core with a primary winding of a wire with a diameter (d) of 0.25..0.35 mm, the number of turns is 100. Several secondary windings of the transformer must have the following parameters:

1. 15 turns with d = 1..1.5 mm.
2. 15 turns with d = 0.2..0.35 mm.
3. 20 turns with d = 0.35..0.5 mm.
4. 20 turns with d = 0.35..0.5 mm.

Before winding, you need to familiarize yourself with the basic rules for winding transformers.

Scheme 1 - Scheme of the inverter power supply

It is advisable not to connect the parts by hinged mounting, but to make a printed circuit board for this purpose. There are many ways to make a printed circuit board, but you should focus on simple version- laser-ironing technology (LUT). The main stages of manufacturing a printed circuit board:

After the manufacture of the transformer and the printed circuit board, it is necessary to proceed with the installation of radio components according to the power supply circuit of the welding inverter. To assemble the PSU, you will need radio components:

After assembly, the PSU cannot be connected and checked, since it is designed specifically for the inverter circuit.

Inverter manufacturing

Before starting the manufacture of a high-frequency transformer for the inverter, it is necessary to make a getinax board, guided by scheme 2. The transformer is made on a magnetic circuit of the Sh20x28 2000 NM type with an operating frequency of 41 kHz. For its winding (I winding) it is necessary to use copper sheet with a thickness of 0.3..0.45 mm and a width of 35..45 mm (width depends on the frame). Need to do:

1. 12 turns (area cross section(S) about 10..12 sq. mm.).
2. 4 turns for the secondary winding (S = 30 sq. mm.).

A high-frequency transformer cannot be wound with an ordinary wire due to the appearance of the skin effect. Skin effect - the ability of high-frequency currents to be forced out to the surface of the conductor, thereby heating it. The secondary windings should be separated with a PTFE film. In addition, the transformer must be properly cooled.

The inductor is made on a magnetic circuit of the type "Sh20 × 28" made of ferrite 2000 NM with S of at least 25 square meters. mm.

The current transformer is carried out on two rings of the "K30 × 18 × 7" type and is wound copper wire. Winding l is threaded through the annular part, and winding II consists of 85 turns (d = 0.5 mm).

Scheme 2 - Scheme of an inverter welding machine with your own hands (inverter).

After the successful manufacture of a high-frequency transformer, it is necessary to mount the radio elements on printed circuit board. Before soldering, treat the copper tracks with tin, do not overheat the parts. List of inverter elements:

• PWM controller: UC3845.
• MOSFET transistor VT1: IRF120.
• VD1: 1N4148.
• VD2, VD3: 1N5819.
• VD4: 1N4739A 9V.
• VD5-VD7: 1N4007.
• Two diode bridges VD8: KBPC3510.
• C1: 22 N.D.
• C2, C4, C8: 0.1uF.
• C3: 4.7 N and C5: 2.2 N, C15, C16, C17, C18: 6.8 N (only use K78-2 or CBB-81).
• C6: 22 microns, C7: 200 microns, C9-C12: 3000 microns 400 V, C13, C21: 10 microns, C20, C22: 47 microns at 25 V.
• R1, R2: 33k, R4: 510, R5: 1.3k, R7: 150, R8: 1 at 1W, R9: 2M, R10: 1.5k, R11: 25 at 40W, R12, R13 , R50, R54: 1k, R14, R15: 1.5k, R17, R51: 10, R24, R25: 30 at 20W, R26: 2.2k, R27, R28: 5 at 5W, R36, R46- R48, R52, R42-R44 - 5, R45, R53 - 1.5.
• R3: 2.2k and 10k.
• K1 for 12 V and 40A, K2 - RES-49 (1).
• Q6-Q11: IRG4PC50W.
• Six MOSFET transistors IRF5305.
• D2 and D3: 1N5819.
• VD17 and VD18: VS-HFA30PA60CPBF; VD19-VD22: VS-HFA30PA60CPBF.
• Twelve zener diodes: 1N4744A.
• Two optocouplers: HCPL-3120.
• Inductor: 35 microns.

Before checking the circuit for operability, you must once again visually check all connections.

Before assembling, you need to carefully familiarize yourself with the inverter welding circuit and purchase everything you need for manufacturing: buy radio components in specialized radio stores, find suitable transformer frames, copper sheet and wire, think over the design of the case. Planning work greatly simplifies the assembly process and saves time. When soldering radio components, a soldering station (induction with a hairdryer) should be used to prevent possible overheating and failure of radio elements. You must also follow the safety rules when working with electricity.

Further customization

All power elements of the circuit must have high-quality cooling. Transistor keys must be "planted" on thermal paste and a radiator. It is advisable to use heatsinks from powerful microprocessors (Athlon). The presence of a fan for cooling in the case is required. The power supply circuit can be modified by placing a capacitor unit in front of the transformer. It is necessary to use K78-2 or SVV-81, since other options are not allowed.

After preparatory work you need to start setting up the welding inverter . For this you need:

There are also more advanced models of inverter-type welders, the power circuit of which includes thyristors. The Timvala inverter, which can be found on amateur radio forums, has also become widespread. It has a more complex scheme. More details can be found on the Internet.

Thus, knowing the device and principle of operation of an inverter-type welding machine, it is not an impossible task to assemble it with your own hands. Homemade option practically does not concede to factory and even surpasses its some characteristics.