When it comes to welding machines Most have to think about welding. Before buying a welding machine We must first know how many types of welding there are. Because each type has different benefits. When we have knowledge, we can take it into consideration. The welding of metals is also subdivided. Can be divided into three groups as follows: the first group is Gas welding, the next group is Arc welding, the last group is High-energy beam welding, with each type of welding is divided as follows.
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Oxyacetylene welding (OAW) gas welding
It is a gas welding process. It is a welding that does not use electricity. But using heat to 3000 degrees Celsius, which is obtained from acetylene gas and oxygen. No soot and smoke The disadvantage is that the connection is slow. Because the density per area is lower than the arc When the density is low, the weld cooling is slow and it causes warping.
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Shielded metal arc welding (SMAW) electric welding
It is a welding process using arc welding. The arcing principle is Use pliers to hold the flux-cored welding wire and attach it to the positive terminal and the negative terminal to the workpiece. The flux breaks down and melts into slag. Construction work or whether it is welding work that is not done in the house.
Gas-tungsten arc welding (GTAW) TIG welding
It is a welding process that uses an arc between the tungsten heads that heat the workpiece. The gun is connected to the argon gas and the welding cabinet terminal. The workpiece is connected to the terminal on the other side of the welding cabinet.
Gas-metal arc welding (GMAW) welding MIG,MAG
It is a welding process by which an arc occurs between the filled wire and the metal workpiece. using gas as a cover There are two types: the first is metal-inert gas (MIG) for non-ferrous metals and stainless steel. It uses inert gases such as argon and helium. The second type is metal-active gas (MAG). Carbon dioxide gas is used to produce a highly clean work site. This process is suitable for welding, fabrication and fabrication, but is costly.
Flux-cored arc welding (FCAW) Flux-core welding
It is a welding process that uses flux cored wire.
Submerged arc welding (SAW)
It is a welding process where electrodes are fed into the weld. Fluff is covered on top. The smelting pond and the arcing area are under the flux.
Electroslag welding (ESW)
It is a welding process that provides high productivity, fast welding, large volume, and thick work.
It is the process of generating heat through electric current and through resistive metals. The high resistance area is the welded area where the metal surfaces come into contact. The metal then melts to form a melting pond connecting the two metals together with an electric current.
spot weld welding machine spot welding
It is welded by compressive strength. Commonly used for connecting metal sheets to be stacked on top of each other. The work is not deformed. No wasted energy does not waste time working. It is often seen in the automobile industry.
welding seam welding seam welding
Almost no difference with spot weld, just from the spot weld seam welding will make the weld line.
Laser beam welding ( LBW) laser welding
It is a process that uses a laser beam to melt the workpiece. It uses a fairly high intensity power. The area where the laser strikes is very hot. Suitable for those who want a job that is difficult to reach into deep niches.
welding machine and therm welding
It is a process of melting iron and aluminum powder. Commonly used for rail connections.
welding current can also be divided into three forms:
- Direct-Current Electrode Negative (DCEN) is the most commonly used type. Because a narrow deep well can be obtained by connecting the gun to the cathode of the welding cabinet. Connect the positive terminal to the worker.
- Direct-Current Electrode Positive (DCEP) is a moderately invested welding. Used to weld aluminum and magnesium. Because the weld width is shallow, this can be done by connecting the gun to the positive terminal of the welding cabinet. Connect the negative terminal to the worker. What is needed for this type of welding is Large tungsten, important is the circulating water system. (Water-cooled) will help prevent overheating, causing the tansten to melt.
- Alternating Current (AC) is a welding that has been a deep melting pond. Used to weld aluminum, use an AC welding cabinet, suitable for some jobs that require cleanliness, but the work will be slow.
Arc Power Source
The welding cabinet serves to supply electricity and is both a transformer. There are two types of power converters, solid state inverters and motor generators, sometimes with multiple functions in one cabinet. Depends on the manufacturer
improvement of weld properties after welding
There are two processes. The first is post-welded heat treatment, the benefit of reducing residual stress. and increase hardness Another process is Knocking to loosen (Peening)
It is hammer forged or may be shot peening. When the stress is relaxed, it results in the residual hardening of the metal surface.