Welding methods and their brief description

Auto-owners, when confronted with the problems of repairing their own transport, necessarily become experts in various fields of "science and technology." One should have at least a superficial understanding of those faults that are not insured, no car, and how to address them, before entrusting your vehicle to a particular specialist. Yes, and to select the wizard will also need to possess some, albeit minimal information, which will serve as a criterion for this choice. One of the most sought after operations to repair a car - it's welding. It is necessary in many cases, but is mainly used for car body repairs, to restore its integrity. After all, as a result of exposure to the metal aggressive environment it is exposed to corrosive processes, and in addition, any car can get the mechanical damage, in particular, as a result of the accident. Below, we consider, what are welding methods and their brief description, as well as the pros and cons of each method. Brief description of the oxygen-acetylene gas welding. This is one of the most famous and old ways of joining metal parts. Apparatus for its implementation is fairly simple structure. Acetylene mixed with oxygen during combustion produces heat, which can heat the metal to 3000 degrees. The main difference between this method of welding on the other is that it allows a slow heating of the metal, which is both an advantage and disadvantage of this method. Gas welding is advisable to apply for those jobs that require the gradual heating of the metal. Due to the simplicity of use, simple equipment, this welding method is still in demand for certain types of repairs. Specialist, gas welder, who do the work of acceptable quality at reasonable prices, to find not so difficult. But this type of welding is very significant disadvantages. Since in this type of welding parts undergo a long thermal effects, then this leads to significant deformation, deterioration of mechanical properties of the metal. In addition, under the influence of a gas burner gets quite a large area of ??metal, not just the piece. All this leads to the fact that the oxyacetylene gas welding is used less frequently in the repair of vehicles, giving way to more technological and productive way of welding. Brief description of arc welding. This type of welding, which uses a heated metal using electric arc, the temperature of which is able to melt all existing metals. For manual arc welding of coated metal electrodes, the arc occurs between the electrode and the workpiece. She melts the electrode rod, and it drops fall on the heated fused piece. Then, during the crystallization of the basic metal and metal electrode rod formed weld. Upon melting, coating electrodes are allocated gas and slag, which provide additional protection of the welding seam. The simplest device for arc welding can produce themselves, only a powerful transformer, which gives the output current of great strength. One solution to fasten parts to be welded, and the second - to the holder with the electrode. But for complex welding operations such device, of course, no good. To perform high-quality welds to arc stability, and this is possible only when the welding current is constant value. The quality of the welding process depends on many components. This is the magnitude and polarity of the current, arc voltage, electrode diameter, composition and thickness of the coating of the electrode, its position during welding. In addition to carefully prepare welded surfaces. The choice of optimal parameters for each individual case can provide only experienced and qualified welder. Before you entrust your car welder, will be superfluous to observe his work, and better yet, to see the body, cooked them a few years ago. Although arc welding is much hotter the gas, it only affects the work piece, so its impact on the metal much more carefully. After the quality of welding a car body in this way will last for many years. Brief description of the resistance welding. This method represents a weld metal by heating it with an electric current is very large forces (several thousand amperes) under the influence of compressive pressure. The advantages of this type of welding are that it causes minimal residual deformation of the metal, and at the same time has a high quality and reliability. In addition, it is easy to use, requires highly skilled welders, welding machines to have a free market. The main disadvantage is the need for two-way access to the welding point, which is not always possible. Another shortcoming of the weld - the inability to perform a continuous seam. Arc welding of gas, or semi-automatic welding. A brief description. This method is by far the most common method used to repair body work. Such a welding method in our country is also known as "Camps", by company name, a device which first hit the USSR. It is more economical, it does not require very highly skilled welders, and most importantly, use it to obtain welds of very high quality. With this method, through a nozzle into a zone of the arc is continuously fed shielding gas (in this case carbon dioxide), which displaces the air from the welding zone, and does not give the metal reacts with oxygen and nitrogen. Instead, the electrode used welding wire is fed from the spool roller mechanism. Under the influence of the arc, it begins to melt, and melted and the base metal. Crystallizing, the molten metal weld pool forms the weld. Argon. A brief description. This is the same arc welding in shielding gases, but instead of the active input of carbon dioxide fed inert argon. The properties of the protective gas depend technological properties obtained arc, and hence the shape of the weld. In particular, argon allows to obtain stable and continuous arc during the welding time, which allows to obtain welds of very high quality. This gas is fairly expensive, so it is inappropriate to use for repairing the body, which will cope well and "Camps". Typically, argon welding is used when working with stainless steel, cast iron, aluminum, titanium and non-ferrous metals. Samovar. An alternative to all of the above methods of welding, but very, very doubtful. It would seem that many jobs, and, in particular, welding, you can do yourself. The more so because of problems with the purchase of apparatus for welding and all the necessary supplies to date, no. But if you calculate all the expenses that you incur, learning a new profession for your welder, this method does not seem like so very attractive from an economic point of view. And if the moral satisfaction of overcoming the new height for you is not the most important thing is to trust your car technician will be more reasonable.