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In the welding industry, spot welding is a type of resistance welding process that is used mainly for welding two or more metal sheets together by applying pressure and heat to the weld area. This type of welding contains a certain specifications of its own, and it typically delivers current for 0.1 seconds or less, so the current must be extremely high, and spot welder typically deliver 150 amps per phase draw on a 440-volt system. In fact, for onsite operators, the spot welding guns are normally difficult to handle for operators, because that can be very heavy and often require great strength, which makes spot weld very dangerous in the manufacturing plant. Furthermore, high amounts of heat and current are involved in the spot welding process, and the spot welder is constantly around hazardous sparks and welding fumes, as a result, worker of spot welder shall be very careful to the equipment as well as the surrounding environment.
Besides, there are a broad series of welding machines within the welding machine inventory, and this type of machines has been developed for a long time that develops a series of their own kinds across very wide applications in the industry, such as flash butt welding machines, grating welding machines, and many other types of welding machines. In the present article, we will go through several of them and take a look at those welding machines and their features one by one for readers to take a look at them.
Speaking of the spot welding machine, here we introduce the projection welding machine at the very first since this one belongs to the spot welding machine and is very popular in the industry. In the welding sector, projection welding machine is a modification of spot welding machine. During the projection welding process, the weld is localized by means of projections on one or both of the work pieces to be joined. The heat is concentrated at the projections, which permits the welding of heavier sections of welds. The projections can also serve as a means of positioning the work pieces. Conventionally, projection welding is often used to weld studs, nuts, and other threaded machine parts to metal plates and is productive in these processing procedures.
Due to the fact that in the welding sector, a resistance spot welding machine is welding machinery by the process in which contacting metal surface points are joined by the heat obtained from resistance to the electric current, as a result, it is considered a subset of electric resistance welding. During the process, work pieces are clamped together under pressure exerted by the electrodes. Usually, the sheets are within a certain range, ranging from 0.5 to 3 mm thickness as designed.
Furthermore, in the metal welding field, resistance seam welding machine is a welding machine in which the welding process produces a weld at the faying surfaces of two similar metals. During the process, the seam may be a butt joint and is an automated process. It is different from flash welding in that flash welding welds the entire joint at once while seam welding forms the weld progressively and starts at one end. Flash butt welding is a very useful welding method, and the flash butt welding machine is an electrical resistance welding processes designed on a welding machine that is utilized for joining components, in which the energy transfer is offered primarily by the resistance heat from the parts themselves. The parts and components are positioned end to end across the full joint areas. A range of section sizes and complex shapes can be con-joined through this machine. During the process, the parts are clamped and brought together slowly while a flashing voltage is applied. Though the process can be manually achieved, most welding machines nowadays are automatic for better controlled accuracy.
In sum, when it is about the concept of welding, which by definition, is a fabrication process that joins metal materials, by using high heat to melt the parts together and allowing them to cool causing fusion. Welding is distinct from lower temperature metal-joining techniques such as soldering and brazing. In addition to melting the base metal, a filler material is typically added to the joint to form a pool of molten material that cools to form a joint that is based on weld configuration can be stronger than the base material. Automatic welding machine is automated welding machine controlled by computer programs to conduct the welding procedures by which human worker don’t need to do manual operation in certain specific details and processes, rendering a more stable working process with less reliance on human power, that reduces the cost of human workers and the participations of manual operation. It is anticipated that with the automation to be advanced in the future, such model of welding process can be improved much and gain more productivity.
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