Welding key points and welding parameters of sheet metal processing welding technology
Publish Time: 2024-08-21
Key points of weldingChoice of welding process method:Different welding methods will produce different temperature fields and thermal deformation. Generally speaking, automatic welding has more concentrated heating than manual welding, narrower heating zone and smaller deformation. CO2 gas shielded welding also has the characteristics of concentrated heating and small deformation due to its thin welding wire and high current density.For thin plate structural parts, special attention should be paid to controlling welding deformation. Automatic welding or other gas shielded welding processes, such as Ar+CO2 mixed gas MAG shielded welding, can be used to reduce thermal effects.Adjustment of welding parameters:Welding parameters include welding current, arc voltage and welding speed. The greater the line energy, the greater the welding deformation. Therefore, it is necessary to reasonably adjust these parameters to control welding deformation.Welding deformation increases with the increase of welding current and arc voltage, and decreases with the increase of welding speed. When adjusting parameters, the effect of arc voltage should be given priority because its influence on welding deformation is more significant.Control of the number of welds and cross-sectional size:The more welds there are, the larger the cross-sectional size, and the greater the welding deformation. Therefore, the number of welds and the size of the cross-section should be minimized in the design to reduce welding deformation.Optimization of construction methods:Continuous welding has a large deformation, while intermittent welding has the smallest deformation. If conditions permit, intermittent welding and other construction methods can be used to reduce welding deformation.Divide the component into several small parts and weld the component in sections, so that the welding deformation is dispersed on each component, which is convenient for the control and correction of component deformation.Consideration of the thermophysical properties of materials:Different materials have different thermophysical properties such as thermal conductivity, specific heat and expansion coefficient, which will affect the thermal deformation during welding. Therefore, when selecting welding methods and adjusting welding parameters, the thermophysical properties of materials need to be fully considered.Welding parametersWelding current:The selection of welding current mainly depends on the diameter of the welding rod and the thickness of the workpiece. For a certain diameter of welding rod, there is a suitable current range. Too large or too small current will affect the welding quality.When selecting the welding current, the joint form, welding position and on-site use should also be considered. For example, in the case of large workpiece thickness, corner welds, low ambient temperature, etc., the upper limit of the current can be selected.Arc voltage:Arc voltage is mainly determined by arc length. Generally, arc length is controlled between 14mm and its corresponding arc voltage is between 1625V. An arc that is too long can easily lead to welding defects, so short arc welding should be used as much as possible during welding.Welding speed:Welding speed also has a significant impact on welding deformation and welding quality. The faster the welding speed, the smaller the welding deformation, but too fast welding speed may affect the fusion quality of the weld. Therefore, it is necessary to select a suitable welding speed according to the specific situation.In summary, the welding points and welding parameters of sheet metal processing welding process are interrelated, and multiple factors need to be considered comprehensively to ensure welding quality and reduce welding deformation. In actual operation, it is necessary to select appropriate welding process methods, adjust welding parameters, control the number and cross-section size of welds, and optimize construction methods according to specific circumstances to achieve the best welding effect.
Dongguan sheet metal processing is currently a common metal parts processing method. Dongguan sheet metal processing process includes many aspects, and welding process is one of the important steps. In recent years, with the advancement of science and technology, the types of welding machines and welding technology have been continuously improved, so there are better product quality. However, for many Dongguan sheet metal processing manufacturers, there are still many sheet metal processing welding problems.The emergence of Dongguan sheet metal processing welding problems is mainly due to the setting of welding parameters or insufficient technical experience of welding machines. In the process of Dongguan sheet metal processing, the welding groove size should be reasonable, mainly to prevent welding deformation. Long welds should not be welded continuously, which is ignored by many people. Welding angle, during the welding process, there should be a certain tilt angle welding. Dongguan sheet metal processing welding is a technology. At present, most sheet metal processing manufacturers use automated welding equipment, so there are fewer welding problems.DongGuan Win-Leading Hardware Technology Co., Ltd. has developed over the years and specializes in hardware products such as hardware molds, stamping products, sheet metal bending, laser cutting, CNC processing, etc. with excellent manufacturing level and service attitude. It is named for its influence in the world manufacturing industry and its product supply capacity that covers the world. Welcome new and old customers to call for inquiries.
