What wire to weld a car with

How to weld a body with a semi-automatic machine

The service life of modern car bodies cannot be called long. For domestic cars it is a maximum of ten years. The bodies of modern foreign cars last a little longer - about fifteen years.

After this period, the car owner will inevitably begin to notice signs of destruction, with which something will need to be done. In addition, the body can be damaged during an accident. Whatever the reason, there is almost always one solution: cook.

If you are confident in your abilities, you can try welding a car body yourself.

Types and features of welding machines

The choice of welding technology depends not so much on the machine and consumables, but on the location of the damage. Let's take a closer look.

Semi-automatic welding

The vast majority of car owners and car service employees prefer to use semi-automatic machines. the reason for their popularity is convenience. A semi-automatic machine can repair even the smallest damage located in the most inconvenient places of the car body.

Technically, this technology is almost no different from traditional welding: semi-automatic welding also requires a current converter. The only difference is in consumables. For this type of welding, you do not need electrodes, but a special copper-coated wire, the diameter of which can vary from 0.3 to 3 mm. A semi-automatic machine also requires carbon dioxide to operate.

Copper on the wire provides reliable electrical contact and works as a welding flux. And carbon dioxide, continuously supplied to the welding arc, does not allow oxygen from the air to react with the metal being welded. A semi-automatic machine has three important advantages:

• the wire feed speed in the semi-automatic machine can be adjusted;
• the seams, made semi-automatically, are neat and very thin;
• You can use a semi-automatic machine without carbon dioxide, but in this case you will have to use a special welding wire, which contains flux inside.

There are also disadvantages to the semi-automatic method:

• Finding the above electrodes with flux on sale is not so easy, and they cost at least twice as much as regular ones;
• When using carbon dioxide, it is not enough to get the cylinder itself. You will also need a pressure reducer, which will need to be adjusted very precisely, otherwise you can forget about quality seams.

How to cook with an inverter

In short, an inverter is still the same welding machine, only the frequency of current conversion in it is not 50 Hz, but 30–50 kHz. Due to the increased frequency, the inverter has several advantages:

• The dimensions of the inverter welding machine are very compact;
• inverters are insensitive to low network voltage;
• inverters have no problems with igniting the welding arc;
• Even a novice welder can use the inverter.

Of course, there are also disadvantages:

• during the welding process, thick electrodes with a diameter of 3–5 mm are used, rather than wire;
• during inverter welding, the edges of the metal being welded become very hot, which can cause thermal deformation;
• the seam always turns out thicker than when welding semi-automatically.

So which method should you choose?

The general recommendation is simple: if you plan to weld a part of the body that is in plain sight, and the car owner is not short of money and has some experience working with a welding machine, then a semi-automatic machine is the best option. And if the damage is not visible from the outside (for example, the bottom is damaged) and the owner of the car has little knowledge of welding, then it is better to weld with an inverter. Even if a beginner makes a mistake, the cost will not be high.

Preparing and checking equipment

Regardless of which welding method was chosen, a number of preparatory operations must be carried out.

Preparation for welding a car body with a semi-automatic machine

• before starting work, the welder must make sure that the guide channel in the welding torch matches the diameter of the wire used;
• The diameter of the wire must also be taken into account when choosing a welding tip;
• The nozzle of the device is inspected for metal splashes. If there are any, they must be removed with sandpaper, otherwise the nozzle will quickly fail.

What to do before starting an inverter

• the reliability of electrode fastenings is carefully checked;
• the integrity of the insulation on the cables, all connections and on the electrical holder is checked;
• The reliability of the main welding cable fastenings is checked.

Precautions for welding

• All welding work is carried out only in dry overalls made of non-flammable materials, gloves and a protective mask. If welding is carried out in a room with a metal floor, it is mandatory to use either a rubberized mat or rubber galoshes;
• the welding machine, regardless of its type, must always be grounded;
• when inverter welding, special attention should be paid to the quality of the electrode holder: good electrode holders can withstand up to 7000 electrode clamps without damaging the insulation;
• Regardless of the type of welding machine, it should always use automatic switches that independently break the electrical circuit when no-load current occurs;
• The room in which welding is performed must be well ventilated. This will avoid the accumulation of gases released during the welding process and which pose a particular danger to the human respiratory system.

The process of welding a car body with a semi-automatic machine

First of all, let's decide on the necessary equipment.

Tools and materials for DIY work

1. Semi-automatic welding machine BlueWeld 4.135.
2. Welding wire with copper coating, diameter 1 mm.
3. Coarse sandpaper.
4. Pressure reducer.
5. Carbon dioxide cylinder with a capacity of 20 liters.

Sequence of operations for semi-automatic welding

• before starting welding, the damaged area is cleaned of all contaminants using sandpaper: rust, primer, paint, grease;
• the sections of metal being welded are pressed tightly against each other (if necessary, the use of various clamps, temporary bolts or self-tapping screws is allowed);
• Next, you should carefully read the front panel of the welding machine. There are: a switch, a welding current regulator and a wire feed speed regulator; Location of switches on the front panel of the BlueWeld welding machine
• Now the reducer is connected to the carbon dioxide cylinder as shown in the photo; The reduction gear is connected to the carbon dioxide cylinder
• a reel with welding wire is fixed in the machine, after which the end of the wire is inserted into the feeding mechanism; The welding wire is inserted into the feeding mechanism
• the nozzle on the torch is unscrewed with pliers, the wire is threaded into the hole, after which the nozzle is screwed back on; Removing the nozzle from the welding torch
• after charging the device with wire, using switches on the front panel of the device, the polarity of the welding current is set: plus should be on the electrode holder, and minus on the torch (this is the so-called direct polarity, which is set when working with copper wire. If welding is done with ordinary wire without copper coating , then the polarity must be changed);
• The device is now connected to the network. The torch with the electrode holder is brought to the previously prepared area to be welded. After pressing the button on the electrode holder, the hot wire begins to move out of the nozzle, and at the same time the supply of carbon dioxide opens; The process of welding a car body with a semi-automatic machine
• if the weld seam is long, then welding is carried out in several stages. Initially, the welded area is “tacked” at several points. Then 2-3 short seams are made along the joining line. They should be 7–10 cm apart from each other. These seams should be allowed to cool for 5 minutes; Several short preliminary seams
• and only after this are the remaining sections finally connected. The edges of the damaged body are finally welded

Weld seam anti-corrosion treatment

After welding is completed, the seam should be protected, otherwise it will quickly collapse. The following options are possible:

• if the seam is not in sight and in an easily accessible place, then it is covered with several layers of automotive seam sealant (even a budget one-component option, for example Body 999 or Novol, will do). If necessary, the sealant is leveled with a spatula and painted;
• if the weld is located in an internal, hard-to-reach cavity that needs to be treated from the inside, then pneumatic preservative sprayers are used. They consist of a pneumatic compressor, a spray tank for filling a preservative (such as Movil, for example) and a long plastic tube, which is inserted into the cavity being treated.

So, you can weld the damaged body yourself. Even if a beginner has absolutely no experience, you shouldn’t be upset: you can always practice on pieces of scrap metal first. And special attention should be paid not only to personal protective equipment, but also to fire safety equipment. A novice welder should always have a fire extinguisher on hand.

Source: https://protachky.ru/obzor/kak-varit-kuzov-poluavtomatom.html

Which welding machine to weld a car body - Metalworker's Guide

:

• Equipment selection
• Carbon dioxide semi-automatic
• Inverter
• DIY welding

Damage to the body may be caused by extensive corrosion or may be the result of a severe accident. In this case, there are two ways to repair a car: replacing the body and overcooking its damaged elements. The second option requires the use of special equipment. This article discusses the tools that can be used to weld a car body, and the technologies for carrying out this work.

Professionals believe that a carbon dioxide semiautomatic machine that performs wire welding is best suited for welding a car body. An inverter can also be used for the work under consideration.

It is not recommended to use a welding machine on an electrode. It is explainable:

• this tool is not capable of creating a high-quality seam when working with automotive metal;
• due to the large size of the equipment, it will be difficult to reach some hard-to-reach places during work;
• there is a high probability of burning through the body metal when using an AC welding machine.

Therefore, electrode welding tools are not suitable for body repairs. You can use them only for simple work, for example, it is possible to weld a broken frame with such a tool.

https://www.youtube.com/watch?v=Cc_M6PkK2h4

As for the inverter and carbon dioxide semi-automatic machine, each of these options is characterized by specific features when used for welding a car body.

However, in any case, in order to properly weld a body, you must have the appropriate skills and follow safety precautions.

In addition, it is important to properly organize the workplace, purchasing and arranging in advance all the equipment necessary for work and organizing sufficient lighting. It should be borne in mind that it is difficult to weld a car body alone, so it is better to find an assistant.

It is considered the most affordable and versatile welding tool. With this equipment you can weld metal with a thickness of 0.8 to 6 mm. The carbon dioxide semi-automatic machine is suitable for performing the following work:

• overcooking sills and side members;
• patching holes;
• straightening dents.

This tool is most often used to weld car bodies with low durability, for example, VAZ models.

The principle of operation of a carbon dioxide semi-automatic machine is to supply carbon dioxide under pressure into the welding zone. In this case, the air mixture is displaced, so the welding process is carried out in a carbon dioxide environment, which protects the metal from oxidation. During the welding process, the metal melts, firmly holding the parts together.

One of the advantages of a carbon dioxide semi-automatic machine is that with this tool you can weld all types of metals, in particular non-ferrous ones, such as stainless steel and aluminum, only for this you will need to replace carbon dioxide with argon.

To ensure the strength of the seams of the body, it is necessary to weld correctly, applying stitches 2 cm long at intervals of 5 cm. The disadvantage of the tool in question is considered stationary, due to its large mass and size, but this is not so important for body repairs, which are usually carried out in a car service center or garage.

It is usually used to speed up welding work; this device uses high-frequency currents (up to 2000 Hz). Its advantages include compact dimensions, high welding speed, the ability to work at low voltage and ease of use, allowing even novice welders to weld a car body.

The disadvantages of the inverter include high cost, sensitivity to dust, and the inability to weld metal thicker than 3 mm.

It is possible to weld the body yourself if you have basic skills, especially using an inverter, which will reduce the cost of paying for skilled labor. However, you will have to get the appropriate equipment somewhere.

The best repair option for body damage is to replace it. But this is expensive, so welding is used to restore inexpensive cars that have low corrosion resistance, therefore, the prevalence of the repair method in question is high. Next, we consider semi-automatic carbon dioxide welding.

Preliminary actions

Before starting work, it is necessary to prepare the areas of the car body to be welded. Preparation consists of completely cleaning the metal from paint, rust and dirt.

Then they move on to preparing the welding equipment for work.

1. First of all, they check the network for load capacity.
2. Next, the welding machine is charged with wire. To do this, you need to remove the gas nozzle of the welding torch, unscrew its copper tip with a wrench, remove the pressure roller with the wire and set the polarity. This parameter is determined by the type of wire used. When using flux-cored wire, set a plus on the clamp, a minus on the torch, and vice versa for regular wire.
3. After this, the end of the wire is inserted 10 - 20 cm into the feed channel and a pressure roller is inserted to keep it from falling off. In this case, the wire should fall into the groove of the drive roller.

Upon completion of the described operations, the device is connected to the network and the key on its handle is pressed, after which gas is supplied, then welding wire and current. In this case, you need to put on the wire and tighten the required copper tip and install the gas nozzle.

Welding Recommendations

During body work, all parts are usually welded except the front part, since during operation it bears minimal loads.

For cars that do not comply with this rule, it is necessary to over-weld, first of all, the places where the front “legs” are attached to the cross beam. In any case, it is necessary to weld the seams of the pallet, pillars and rear part of the car body. The fenders and hood are usually not treated.

It should be noted that the body has some weak points that are especially susceptible to destruction by corrosion, so these areas are most often welded.

The bottom can be boiled on both sides, but during work it is necessary to observe the temperature regime. This will preserve the structure of the seams and neutralize the harmful effects of the welding machine on the material.

Metal sheets 1.5-2 mm thick are usually used as patches for the bottom. Thinner metal is unreliable, and thicker metal is difficult to process.

It is necessary to cut the material in compliance with optimal conditions in order to avoid deterioration of its properties. It is better not to cook the bottom alone, since the sheet of metal needs to be positioned evenly, which is difficult to do alone.

Upon completion of the work, the edges of the welded sheet of metal are ground and treated with primer or epoxy resin to ensure tightness. After overwelding is completed, it is necessary to treat the seams with a primer.

In this case, special attention is paid to the seams of the pillars, pallet and rear part of the body.

A carbon dioxide semi-automatic machine can weld not only the body, but also the engine and muffler of the car. When working with the engine, it is necessary to use argon. This allows you to weld metals such as cast iron, stainless steel, ordinary steel, and aluminum, which make up most engine parts. Over-welding the muffler is carried out similarly to welding the bottom, that is, by applying a metal patch.

Source: https://ssk2121.com/kakim-svarochnym-apparatom-varit-kuzov-avtomobilya/

Which welding method is better to weld a car body?

The service life of modern car bodies cannot be called long. For domestic cars it is a maximum of ten years. The bodies of modern foreign cars last a little longer - about fifteen years.

After this period, the car owner will inevitably begin to notice signs of destruction, with which something will need to be done. In addition, the body can be damaged during an accident. Whatever the reason, there is almost always one solution: cook.

If you are confident in your abilities, you can try welding a car body yourself.

All the details of welding the body of a damaged car

The vehicle body consists of individual components connected to each other. During operation, stress is placed on the seams connecting the structure. For this reason, they gradually lose strength. The integrity of the car can also be compromised as a result of an accident. To restore the vehicle's functionality, welding is used.

Types of welding machines

Most often, body parts need to be repaired. Before you figure out what welding to use to weld the body, you need to determine what it consists of. The machine body is based on low-alloy steels containing titanium or carbon steels. The thickness of the material is usually from 0.6 to 0.8 millimeters. In this regard, three types of devices are allowed for welding cars:

• manual arc - the main element is the welding rectifier, which provides the bottom seam;
• gas - welding work is performed using a torch;
• semi-automatic - the connection is ensured thanks to a carbon dioxide cylinder and wire.

The choice of welding machine depends on a number of factors. You can carry out welding work yourself if you have special experience or education.

Preparing the semiautomatic device for operation

Before using a semi-automatic welding machine, preparatory work and setup are performed. Do-it-yourself welding requires a careful approach, as it can cause damage to the equipment.

Body welding is carried out in several stages. At the first stage, the necessary tools are prepared. The list consists of:

• semi-automatic welding machine;
• special welding wire;
• coarse sandpaper;
• pressure regulating reducer;
• carbon dioxide cylinder.

Source: https://InfoKuzov.ru/remont/svarka-kuzova

Methods for connecting elements during automotive welding

Different components and options for car repair using welding require a different approach to pairing new inserts with the old body. Let's look at three main ways to install metal patches.

Butt mate

Welding a car body with a semi-automatic machine is most often carried out using a butt joint. In this way, additional unnecessary thickenings on the body are not created. This method is used when welding patches or small inserts that are not subject to high tensile strength.

Connection types

Before working with the patch, you can chamfer the sides that you plan to weld.

If the sheet thickness is up to 2 mm, then you can do without chamfers. This method of mating requires more painstaking adjustment of the welded part and the prepared area of ​​the car body. Gaps should be kept to a minimum, and ideally, they should be avoided. The method is usually used for external external elements.

When performing this operation, the welder must have sufficiently high qualifications.

Butt welding

The work is carried out using a continuous spot weld. A high-quality result does not require labor-intensive straightening and lengthy cleaning. Sometimes putty and grout are enough. Thicker sheets of iron are easier to weld, and they can also be welded with a continuous spot weld. Thin sheets are more difficult to cook.

Lap joint

This connection is the simplest and therefore has become widespread among automotive welders. So, one of the pieces of metal is superimposed on the other, and the hole that needs to be patched is completely blocked.

Welding overlap

The method is suitable for welding load-bearing structures: thresholds, spars, etc.

Welded electric rivets

This method is rather a type of overlap connection. However, it is similar to spot welding. It is actively used in automotive welding. For example, it is used to install new fenders and reinforcing linings on the body frame.

Types of Welds

Regardless of the joining methods, in each case, semi-automatic welding technology involves the use of different types of seams. There are three popular seam options:

1. solid;
2. point;
3. continuous intermittent.

Types of seams

Each of them can be applied in any of the mating methods, both with overlaps and butt joints.

Source: http://ktonaavto.ru/remont-i-obsluzhivanie/kuzov/kak-varit-kuzov-poluavtomatom.html

Welding body metal (part 1): choosing equipment and setting up a semi-automatic welding machine | Tiberis

Many car enthusiasts will agree that the need to resort to welding when repairing a body is simply undeniable. And along with tin work, welding is also used in the daily work of auto mechanics in auto service centers. Because Many body metal problems can only be dealt with if the correct welding equipment is available. Therefore, we will answer the question - what kind of welding equipment is suitable for body welding work.

Specialists who understand welding equipment, when asked which welding machine and welding method is suitable for the purpose we are describing, will first ask a number of important counter questions. Namely: what are the requirements for the equipment (mains voltage, welding current, etc.

), requirements for welded joints, what qualifications the worker who will carry out the welding process has, and most importantly what metal will be welded and its thickness.

Such information is necessary for a specialist to help you select (advise) the desired welding method and the equipment necessary for it.

And so, let’s immediately determine that for performing body repairs, the two most common and affordable welding methods for this specific type of work are suitable, namely, semi-automatic welding (MIG is most suitable for good quality joints of steels (low-carbon), which are used in the automotive industry .

In this article we will consider in more detail the universal welding method, which in most cases has already replaced gas and manual arc welding from the auto repair industry, namely semi-automatic welding. There are a number of disadvantages of manual arc welding:

• It is inconvenient to weld body joints with an electrode, because... It’s not possible to “climb” everywhere
• Cleaning the surface from slag
• High risk of burning a hole in the metal

You can learn about the type of resistance welding from our following articles, because... it is more specific, but is used not much less often in service stations than semi-automatic, mainly due to the lack of consumables.

Equipment for repairing body metal using semi-automatic welding

For the type of semi-automatic welding in low-carbon steel (MIG/MAG) we have chosen, it is necessary to use devices for semi-automatic metal welding, popularly called semi-automatic welding machines.

You can find out more about semi-automatic welding machines and the choice of semi-automatic welding machines in the article at the link, which will describe in detail how to choose a semi-automatic welding machine that will suit your requirements.

If you have read the article on choosing a semi-automatic welding machine, then you already know that a semi-automatic welding machine can weld metal with diameters of 0.5-0.8 mm (thin) and quite large ones from 4 mm and thicker. This may mean that this type of equipment is perfect for welding car body structures - side members, sills, wings, etc.

Preparing equipment for body metal welding

The first thing that needs to be checked when using welding equipment is the network for its load capacity. Simply put, find out whether the network used will support the load of the semi-automatic welding machine. To do this, you can use a specialized tester to calculate the power load.

Connect an electric heater or similar electrical devices with a load of 2-3 kW to the network, and if the network voltage under load is less than 200 -215 Volts, then the operation of the semi-automatic welding machine will often be problematic. Inverter semi-automatic machines will be more reliable in operation, because... are inclined to work in leaky networks. If your network produces less than 150 volts under load, then it is unlikely that you will be able to carry out the welding process using a semi-automatic machine.

This problem can be solved with the help of a power plant or generator. It is important that in this case the generator must be used with a power greater than the power of the semi-automatic device.

Secondly , if the power supply network gives you the opportunity to use a semi-automatic welding machine, then you need to connect the device to the network and check it before welding for signs of malfunctions and malfunctions (unusual noise, crackling) and, if there are any, eliminate them.

After these procedures, you should properly prepare the semi-automatic welding machine for work.

Information on preparing a semi-automatic welding machine for operation is usually contained in the manual (passport) from the device manufacturer. But if you don’t have one, then don’t worry! We have compiled quite detailed instructions for connecting a PA for you!

Connect the gas (carbon dioxide) to the PA

1. We install the reducer on a cylinder with carbon dioxide; technical carbon dioxide is best suited, because... it contains less water vapor.
2. The reducer is most often connected to the cylinder with a 32 nut; be sure to install a gasket under the nut in order to avoid “leaking”.
3. Next, we connect the gearbox with a special hose to the semiautomatic device. Most often, modern PAs have a special fitting through which the hose is connected. The main thing is that the fitting on the reducer matches the diameter of the hose. Then, the hose is attached to the fitting using special clamps.

Now we come to the final stage of preparing the semi-automatic welding machine for operation - adjustment.

Adjustments of semi-automatic welding machine

In order to ensure reliable and high-quality semi-automatic welding, be sure to adjust the device.

1. First, adjust the wire tension. This can be done using a special plastic nut, which is installed on the reel bobbin. If you tighten the nut, then you increase the friction between the support and the reel. The result is that the welding wire is automatically tensioned in direct proportion to the set friction force. The main thing is to achieve a result that the tension of the welding wire does not make drawing too difficult, but at the same time does not sag from the spool.
2. Next, you need to adjust the force of the roller that presses the wire in the feed mechanism. Here, you need to ensure that the welding wire passes into the channel from the supply hose even when bending.
3. Be sure to adjust the gas flow. You can set the gas flow rate using the valve on the gas cylinder, which should be opened slightly by one or two turns. Pre-set the pressure on the reducer to approximately 2 kg/cm.
4. Afterwards, press the welding torch button. Try to press so that the wire first “steels” and the gas valve opens. With this action, the gas flow rate should be 7-10 liters per minute (the value can be seen on the flow scale of the gas flow manometer). If you notice that the consumption is very different, try to adjust it. It is IMPORTANT to remember here that the main parameter is not the gas pressure, but its flow.

Now it remains to adjust the most important setting for the PA, namely the welding current voltage. But you will have to deal with it only during the welding process.

After you have become familiar with preparing a semi-automatic welding machine for operation, you can move on to the basics and method of welding body metal, which we will tell you about in the second part of our review.

Source: https://www.tiberis.ru/stati/svarka-kuzovnogo-metalla-chast-vybor-oborudovanija-nastrojka-pa

What wire should you use to weld a car body?

" Technique "

Question for experts: has anyone welded a car by welding without gas? How realistic? (I mean semi-automatic)

Best regards, RUSLAN Ananin

Best answers

Yes, it’s better to buy the appropriate wire, although we already welded it like that, and nothing)))))))

everything burns to hell. It's hard to cook

You need special wire, flux cored. . but anyway, the seam is not very good..

a lot of time! and so cook mona! and without carbon dioxide it’s a little worse, but it should hold

I cooked the mufflers several times and everything was ok

I welded cosmich with simple welding without any automatic machines, electrode 4 OK 46, through a rheostat spiral - everything is fine, you just need to get the hang of it. And with a semi-automatic device - boldly forward

Have you read all the answers? And now - the correct one: Cooking without gas with a semi-automatic device is the same as writing with a pencil without a lead. The scribbles and traces will remain, but turn the sheet over and you’ll read the hell out of it. I won’t read welding theory... Just the basics.

I myself have the 6th (there is no higher) rank of welder. Carbon dioxide serves to stabilize the arc and cover the seam from oxidation products. Now think! The arc will tear... The seam will burn... Try welding two pieces of metal and placing them towards the seam.

Doesn't it look like cardboard?

Still have questions? If you have one, write me a private message!!!

da eta muka a ne svarka metal puziritsa kak durnoi ia vashe lu4she ne pitatsa toka portish shvi da i ne doveriaiu ea takim soedineniam bez gaza

answer

This video will help you figure it out

Answers from experts

inverter current is welded that the thread is welded with wire

an inverter for the electrode, and for welding it is best to mix argon with carbon dioxide, and a semi-automatic wire, although there are some models with wire that cook without gas, but the wire is very expensive

The car body is welded semi-automatically with the supply of welding wire and carbon dioxide (cooked in a carbon dioxide environment). The metal of body parts is thin, so they cook with it.

With good skill, you can, of course, weld the body a little using conventional electric welding (electrodes). Good dexterity is needed, because such welding, unlike semi-automatic welding with carbon dioxide, burns through a thin sheet of metal, heats it up greatly, after which the metal “warps” greatly.

But I have a relative who managed to weld the entire car using ordinary welding in such a budgetary way - should I buy a semi-automatic machine for this, or what?

And one more thing: if you are not a welder, do not start welding your car right away - you need good experience. Of course, if you have some kind of trough, which is not a pity, but just for experience, then it will do (but I see that this is not your case).

Instead of buying an expensive device that will then lie around, it is better to pay an experienced welder and all that.

to weld the body, it is best to turn to specialists, especially if you are not a welder. Further, buying a device if you do not plan to work on it professionally is simply expensive stupidity.

Bodies in services are usually cooked using a semi-automatic machine, the same one to which carbon dioxide is necessarily connected. Of course, carbon dioxide is not needed for a conventional inverter for manual arc welding, but it is unrealistic to weld a body with it.

If you don’t make holes, you will warp the metal - that’s 100%! The inverter is not suitable for such purposes.

It depends on what you are cooking with, if it’s with wire, then by all means, but in general, look at the instructions for the device

An inverter is an electric arc welding machine using transistors.
What cylinder? where do you want to put it?

I tried welding with wire without acid, the results were disappointing. Firstly, flux-coated wire is softer, and even with a slight bend of the torch or hose, a beard appears on the feed mechanism. Secondly, the price is clearly inflated (refilling the acid cost me 370 rubles, the wire with flux cost 400, and there is no more than 1 kg of it) The third-seam turns out to be porous.

Can . I saw how they cooked it myself. Special wire for welding without gas

The wire comes with flux, but it is much more expensive. There are both domestic and foreign brands. Accordingly, there is a difference in price.

I completely agree with ANDREY! But it's better with gas!

Source: https://dom-voprosov.ru/tehnika/kakoj-provolokoj-varit-kuzov-avtomobilya

Welding the bottom and body of a car is a complex and labor-intensive process - Welding

The bottom of a car that is completely rotten can be repaired. Welding allows you to restore the integrity of the part and overcome corrosion.

At the AUTOPROFI technical center, repairs are carried out in compliance with optimal temperatures and quality control of welds.

Auto welders know well the required thickness of metal, because a sheet that is too thin will collapse too quickly, and a sheet that is too thick creates many problems. On average, sheets with a thickness of 1.5-2 mm are used.

Repairing or restoring the bottom is quite difficult. Primarily due to the numerous parts and assemblies that are attached to it. Accordingly, it will be necessary to dismantle the interfering elements to avoid their damage. Of course, this is not always required. After lifting the car, the specialist will inspect the underbody and tell you whether something needs to be removed before starting the welding process or not.

In order for a car to serve for a long time, the bottom must be free of damage, corrosion, cracks, and holes in the metal. This is an ideal condition, and it quickly disappears under the influence of road chemicals, precipitation, temperature changes and humidity.

Through holes in the bottom appear not only due to rust, but also after stones or hard objects get into it. Regardless of the type of damage, AVTOPROFI welders guarantee the quality of repairs and patches. The services include partial welding and complete re-welding of the bottom.

Since the bottom is not visible to the eye, the appearance of the weld is usually not paid attention to. However, AVTOPROFI will still make thin, uniform seams using argon or carbon dioxide welding. It is this approach that allows for the strength of connections to be achieved. After welding, the seams will be treated with anticorrosive and cleaned.

Is it worth doing everything yourself?

Repairing the bottom yourself using a welding machine is a labor-intensive process with an unpredictable result. Firstly, it needs to be done together.

Both mechanics must have the necessary experience and understanding of the process. The equipment must be modern and meet regulatory requirements.

After cooking is completed, you will need to use various protective materials that may simply not be in the garage.

If you miss the moment and allow the welding to deform the bottom with the formation of a dent, then you will have to tap the metal with a mallet. And the point is not in appearance (it is not very important with the bottom), but in the fact that dirt mixed with reagents will accumulate in these dents and “dimples”. The result is again corrosion, rust, and start over!

It is much more convenient and even more profitable to immediately order welding of the bottom at a professional technical center. Here they will quickly eliminate damage using a semi-automatic machine with carbon or argon, preserve the metal matrix without distortion, and prevent the joints from becoming clogged with slag.

How to cook the bottom

You can find many solutions, but it is recommended not to reinvent the wheel and choose the most reliable one. That is, cut patches from good metal and weld them in place of the rotten parts of the bottom of the car.

https://www.youtube.com/watch?v=zWCxmT1NA0c

The AUTOPROFI technical center is open from 9 a.m. to 9 p.m. You can sign up for body welding and underbody welding any day of the week. Six lifts provide high vehicle throughput, so the wait won't be long!

Source: https://svarkaman.ru/drugoe/svarka-dnishha-i-kuzova-mashiny-slozhnyj-i-trudoemkij-protsess.html

What wire to weld a car body with semi-automatically

Semi-automatic body welding. There were minor problems either with the quality of the wire (before shooting I bought a reel from another manufacturer), or with the voltage in the network sagging. Honestly, I wasn’t very happy with the seam myself, but the goal was to show the principle.

52

They don't cook it like that! Not only will the metal near the seam leak, but it can also twist the entire door. Only dots with gradual filling of the seam!

Everything you say is correct, but the point is not to show how to cook the door. But in general, if you let the metal cool a little, you can weld it solidly without deformation

Guys, people will at least tell you jokes. he's just trying to get views on YouTube and make money. but there’s nothing to see there. partak on partak, everything is already described below

Welded by God)

And the topicstarter sits and quietly reads the comments!)))
Why are you hiding, Kravchonok?!

Everything is great with you, let everyone make a video of how you cook. And about the chameleon, it hurts your eyes.

Yes, I have a cardboard mask and 3 chameleons. I honestly don't care what to use. and the eyes of a chameleon really hurt!

Better delete it, the first one wrote it correctly - complete crap.

Once again we made “Marcello Mastroianni” happy with welding! Once again I remembered the phrase I already mentioned: If you don’t know how to do it yourself, teach someone else! And so let’s go through the video provided. Briefly about the “points” and pliers when drawing out flappers. When will you stop making people laugh?! If you’ve already done it If we talk about extracting the “slammer”, then we must start with the fact that it must be controlled from the outskirts, moving closer and closer to the epicenter.

In general, an entire video could be devoted to the theory of straightening clappers, and not a fragment with pliers. Now about welding itself. First, we must immediately deprive bonuses for working with power tools that do not have protection! (If you don’t know how, teach us) First! The proposed method of butt welding when repairing a car is in itself absurd! And there are several reasons for this! First of all, it is the complexity devoid of technical logic and the inevitability of warping of the metal.

Let me emphasize: warping is INEVITABLE! Second! Welding of any patch, both end-to-end and overlapping, begins with fastening it in the middle of the sides of the patch. Angles. Then half the sides - in half and all other points are placed not every 10 mm, as the author claims, but in half, with the order of points spaced along the entire welding perimeter: from the left: from the right: from the bottom; from above and so on in a circle.

Half - in half! And again, the distance between the points is halved! With reaching the level of the number of points, providing a sufficient level of strength.

Welding a patch on a car with a continuous seam is sheer stupidity! If you have already decided to weld it with a continuous seam, you should do this slowly, spacing short seams 15-25 mm apart in opposite directions of the patch to prevent overheating, and as a result, warping. Only welded with a continuous seam shock absorber cups and power-bearing parts of the side members (working on bending). As a rule, these are places in the area of ​​​​the rear springs.

Welding with a continuous seam, as I already said, will end with inevitable warping of the metal, which will be quite difficult to straighten later! And I assure you, the amount of putty that you wanted to save on when doing butt welding will turn out to be an order of magnitude greater! I have already spoken about overlap welding : Midpoints of the sides. Angles. Half and half.

Halves in half! The reliability of a welded joint must be determined not so much and not only by the strength of the seam! This means that the seam made must be guaranteed to be treated with special means that protect it, both from the outside and from the inside, from exposure to moisture. This is especially important if the front side has decorative paintwork. To sum up what I saw, I can say that you have already received your share of negative criticism from forum members. What causes misunderstanding is the insistence of the authors of the videos to teach everyone what they themselves, stepping on a rake, learned in the garage. Understand, young people people! I will be happy to watch your movie if everything in it is succinct, clear, competent and professional! No! Not anally, but professionally! I can’t yet say that you have learned anything after the last “tank” battle. Score for the video: THREE with a MINUS. The topic is not covered. Safety violations. Jambs in theory.

Only "Three minus"

It’s not for nothing that a monkey with a grenade is drawn.

I noticed this clearly! Monkey!)))

Once again we made “Marcello Mastroianni” happy with welding! Once again I remembered the phrase I already mentioned: If you don’t know how to do it yourself, teach someone else! And so let’s go through the video provided. Briefly about the “points” and pliers when drawing out flappers. When will you stop making people laugh?! If you’ve already done it If we talk about extracting the “slammer”, then we must start with the fact that it must be controlled from the outskirts, moving closer and closer to the epicenter.

In general, an entire video could be devoted to the theory of straightening clappers, and not a fragment with pliers. Now about welding itself. First, we must immediately deprive bonuses for working with power tools that do not have protection! (If you don’t know how, teach us) First! The proposed method of butt welding when repairing a car is in itself absurd! And there are several reasons for this! First of all, it is the complexity devoid of technical logic and the inevitability of warping of the metal.

Let me emphasize: warping is INEVITABLE! Second! Welding of any patch, both end-to-end and overlapping, begins with fastening it in the middle of the sides of the patch. Angles. Then half the sides - in half and all other points are placed not every 10 mm, as the author claims, but in half, with the order of points spaced along the entire welding perimeter: from the left: from the right: from the bottom; from above and so on in a circle.

Half - in half! And again, the distance between the points is halved! With reaching the level of the number of points, providing a sufficient level of strength.

Welding a patch on a car with a continuous seam is sheer stupidity! If you have already decided to weld it with a continuous seam, you should do this slowly, spacing short seams 15-25 mm apart in opposite directions of the patch to prevent overheating, and as a result, warping. Only welded with a continuous seam shock absorber cups and power-bearing parts of the side members (working on bending). As a rule, these are places in the area of ​​​​the rear springs.

Welding with a continuous seam, as I already said, will end with inevitable warping of the metal, which will be quite difficult to straighten later! And I assure you, the amount of putty that you wanted to save on when doing butt welding will turn out to be an order of magnitude greater! I have already spoken about overlap welding : Midpoints of the sides. Angles. Half and half.

Halves in half! The reliability of a welded joint must be determined not so much and not only by the strength of the seam! This means that the seam made must be guaranteed to be treated with special means that protect it, both from the outside and from the inside, from exposure to moisture. This is especially important if the front side has decorative paintwork. To sum up what I saw, I can say that you have already received your share of negative criticism from forum members. What causes misunderstanding is the insistence of the authors of the videos to teach everyone what they themselves, stepping on a rake, learned in the garage. Understand, young people people! I will be happy to watch your movie if everything in it is succinct, clear, competent and professional! No! Not anally, but professionally! I can’t yet say that you have learned anything after the last “tank” battle. Score for the video: THREE with a MINUS. The topic is not covered. Safety violations. Jambs in theory.

Only "Three minus"

Source: https://nadouchest.ru/kakoj-provolokoj-varit-kuzov-avtomobilja/

Everything you wanted to know about welding a car yourself

Fortunately for manufacturers (and unfortunately for car enthusiasts), the service life of modern cars is far from ideal. If some 30-40 years ago cars were produced to last for decades (many car owners still have Mercedes from the 80s and 90s in their garages, which have survived everything possible), then modern cars are designed to last a lifetime from 5 to 10 years maximum and require auto repair.

And the first blow is taken not by the unit or suspension, but by the body. Already after 5-7 years on foreign cars (and on domestic cars after 3 years) pockets of corrosion begin to appear. If this problem is not corrected immediately, it will begin to progress and the body will collapse right before our eyes. In this article we will tell you how to weld a body with your own hands and what equipment you will need for your car in order to carry out repairs more or less efficiently.

Which welding machine to choose

A welding machine for a car is 50% of your work. Ease of use and speed of operation depend on its correct choice. We invite you to compare a semi-automatic and a conventional inverter.

Let's start with semi-automatic machines, since these are often what you will see at service stations or in private car repair shops. Semi-automatic welding is very convenient, especially in hard-to-reach places, and the body has plenty of such places. To operate a semi-automatic machine, you will need wire and a protective gas (most often argon or carbon dioxide). The gas protects the seam from oxidation and the negative effects of oxygen.

What are the advantages of a semi-automatic? Well, firstly, the quality of the seams. They can be of different widths, but are always very neat. You can also adjust the wire feed to suit your skills. If you do not have the opportunity to cook with gas, then you can use a special wire consisting of flux.

But, like any welding technology, it also has its disadvantages. First of all, if you decide to use electrodes for a semi-automatic machine instead of gas, then be prepared for a high price tag. And if you still decide to use gas, then you need to purchase a reducer for it, with which you will need to reduce the pressure. Plus, setting up the gearbox requires skill.

Now let's talk about inverters. Is it possible to weld a car using inverter welding instead of a semi-automatic one? Of course you can cook it. We declare this with full responsibility. To work you will need a welding machine and electrodes.

First, about the advantages. Inverters come in a variety of different types; the choice is truly great. Manufacturers offer compact budget models and professional units. Inverters are also capable of operating in conditions of unstable network voltage. It is also extremely easy to ignite an arc using an inverter. For this reason, even for a beginner, welding a car with an inverter will not be a problem.

Now about the disadvantages. You will have to look for very thick electrodes on sale (up to 5 millimeters in diameter), but they are rare and are not cheap. In addition, if you use such electrodes for welding a body, the seam will be far from ideal.

So which welding method should you choose? We can say one thing: if the quality and beauty of welding is important to you, then definitely choose the semi-automatic method of welding a car. With such a welding machine, you will be able to do the job very well and, if you have the skills, you will make a seam no worse than in a car service. Well, if the beauty of the car is not in the first place, choose inverter electrode welding.

Now you know how to choose a welding unit for working with a car. Evaluate all the pros and cons of a semi-automatic device and an inverter, make your choice.

Precautions

Don’t think that if you brew in your garage, you can neglect safety precautions. You must carry out any welding work in special equipment: clothing made of thick material, a mask and gloves. This is the minimum set. If you are welding parts in a garage with a metal floor, then the shoes should be rubber.

The welding machine must be grounded for welding. To repair automotive hardware using an investor, you will need a high-quality holder. A low-quality one simply will not withstand repeated clamping and will deform the insulation.

Also, your garage should be ventilated, and even better if it has forced ventilation. If you do not follow this rule, gases may accumulate in the room and you will become poisoned.

How to weld a body with a semi-automatic machine

We chose a semi-automatic machine because with its help the seams will be of better quality and more durable. In our work we will use a welder from BlueWeld model 4.135 (you can use any other welding machine for cars). Also in our arsenal are filler wire with a diameter of 1 millimeter, sandpaper, a reducer (with its help we will reduce the pressure), and a gas cylinder (a 20-liter cylinder is enough for us).

First, we clean the metal surface from rust and dirt. This can be done by hand using sandpaper, but if you have a sander, use it. Next you need to press the parts tightly against each other. To do this, you can use any clamps, bolts, or even temporarily connect them with self-tapping screws. Now we need to connect our reducer to the gas cylinder. The photo below shows how to do this.

Next, you need to feed the wire into the welding machine and insert the end of the wire into the feed mechanism. The photo below shows the wire feeding process.

Now unscrew the nozzle on the burner (we did this using pliers), thread the wire through the hole and screw the nozzle back on.

So, everything is ready. You need to configure the device. We set it to straight polarity because our wire is copper. If the car is welded with regular wire, then set the polarity to reverse.

We connect the device to an outlet. We press the wire feed button, and at the same time the gas supply should begin. We begin to form the seam. If the seam is short, you can make it continuous. If the seam is long, then first we form “points” at different joints. Then we make several short seams between the points. There should be 10 cm gaps between the seams. Let the seams cool. Now let’s cook the remaining sections.

Seam processing

We figured out what is needed to weld a car body. But after completing the work, you also need to treat the seams so that they do not cause corrosion.

An economical option is to cover the seam with auto sealant. For greater savings, you can choose a one-component sealant. If appearance is important, the sealant can be leveled with a spatula, sanded and painted. This is the most budget option.

If you are one of those who believes that car welding work must be of high quality (even if done with your own hands in the garage), then you can use special preservatives that are applied to the seams using a pneumatic sprayer.

Instead of a conclusion

We briefly told you how to cook a body. Naturally, it is impossible to describe absolutely all the nuances in one article, but with the help of our recommendations you can perform simple welding work on a car. If you have never welded a body, then practice on a piece of metal. During work, be sure to follow safety precautions, use a mask and gloves.


Source: https://svarkaed.ru/svarka/izdeliya-i-konstruktsii/vse-chto-vy-hoteli-znat-o-svarke-avtomobilya-svoimi-rukami.html

What type of welding to use to weld a car body?

A passenger car is a vehicle necessary for solving multiple problems. The car body is a vulnerable component of its design, which over time attracts faults. So, periodically there is a need to weld the body (according to the depreciation period of the car, or after an accident). Before starting work, you will need to figure out which car body welding is preferable and which method and equipment to choose?

Types of welding for body repair

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For welding work when repairing a car body, the following types of welding are most often used:

• carbon dioxide semi-automatic;
• inverter welding.

Inverter welding requires great precision and accuracy in work, and it is also impossible to work with metal thicker than 3 millimeters.
The carbon dioxide semi-automatic machine is a universal repair tool for welding the main part of the car; in addition, there are a large number of model options today.

The carbon dioxide semi-automatic machine makes it possible to weld the body of a passenger car in areas where the thickness of the metal reaches 6 millimeters. Thus, it becomes possible to easily carry out repairs and eliminate a variety of metal defects, weld sills and car body, side members, remove holes, weld fenders and straighten dents.

The universal use of carbon dioxide equipment was achieved due to the gas operated by the equipment - carbon dioxide. Under pressure, carbon dioxide is supplied to the welding zone, displacing air from it. This way the metal surface avoids contact with air and, consequently, oxidation. Preventing the formation of an oxide film on the surface of a metal sheet in the future guarantees a high-quality connection (of course, if the welder’s actions were qualified during operation).

If argon is used as an alternative to carbon dioxide, then even non-ferrous metals can be welded, including aluminum, stainless steel, etc. However, in this case, you will need to use a filler wire made of a metal that matches the surface being processed. So, if you weld an aluminum sheet of the car part in question, the solder will have to contain aluminum.

Repairing a car body using semi-automatic welding is quite difficult, but it is quite possible if you know some specific steps, algorithms of action, and follow the advice and instructions of experienced professionals. The car body is a critical component that is the basis. What should be the preparation? This question should be of interest to every welder who wants to repair his personal vehicle.

Equipment preparation and repair

Before welding a car, proper preparation must be done. Below is the procedure for preparing welding equipment, which is a carbon dioxide semi-automatic machine, as well as the work itself on repairing a metal sheet.

Procedure

1. First, the supply network is checked for load capacity. This must be done due to the fact that a semi-automatic device is a fairly powerful electrical device, the power requirements of which not every network can meet.
2. Next, the semi-automatic machine will need to be equipped with filler wire, for which you will need to remove the burner nozzle, and then unscrew the copper tip of the gas heater using a key.
3. Next, a pressure roller with wire is used, and the desired polarity of the operating current is set. For example, in flux-cored welding, the “plus” is installed on the clamp, and the “minus” is installed on the torch. When using ordinary wire, reverse polarity is used.
4. Now the end of the wire is inserted 20 centimeters into the supply channel of the equipment, holding the solder from falling off, and a pressure roller is brought in. The wire must necessarily fall into the groove on the drive roller.
5. The required copper tip is put on the wire, twisted and the gas nozzle is installed.
6. Carbon dioxide is connected, for which you need to install the reducer on a gas cylinder with carbon dioxide, and then connect the reducer and the semi-automatic device using a hose.
7. Only after completing all the above procedures, the semi-automatic device can be connected to the network, and the key on the handle of the gas burner is pressed.
8. First, gas is supplied, and after it the wire and current are supplied.

Welding work

• If necessary, the required section of metal is cut out.
• The section is applied to the damaged area, the edges are cleaned with sandpaper.
• The diameter of the filler material must correspond to the thickness of the workpiece.

The welding process is carried out with arc separation, passing the cathode from thick material to thin material.

The resulting seam is tapped with a hammer to remove the resulting slag. It is better to weld the car body in increments of 5 centimeters with stitches 2 centimeters long. This welding option will be stronger than the spot method. It is better to weld the body of a passenger car using stitches in this case, since the rigidity of the body increases significantly, while the deformation of the metal decreases during subsequent operation.

This is especially important when there is a significant load on the car.

Useful tips

• When carrying out welding work, be sure to use a protective mask and special clothing. What welding process is complete without personal protective equipment?
• It is useful to remember that the entire body must be boiled, except for the front part, since it is this part that bears the minimum load.
• The car floor can be welded on both sides, and the seams should be treated with a special primer.

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Source: https://kuzovspec.ru/remont/kakoj-svarkoj-varit-kuzov-avto/