The welding nut of the medium frequency spot welder is the realization of the projection welding function of the spot welder. It can complete the welding of the nut quickly and with high quality. However, several problems need to be solved during the projection welding process of the nut. There should be no oil stains and rust before welding.
1. Under the same welding current and pressure, the destructive load increases with the increase of welding time. When it increases to a fixed value, it decreases instead. Therefore, preheating is generally not used for welding to prevent overburning.
2. Under the same welding current and welding time, the damage load decreases with the increase of welding pressure. Because the pressure increases, the contact resistance between the nut bump and the plate decreases, thereby reducing the welding heat and the damage load. The welding pressure is too high, the convex ring is crushed prematurely, the current density drops sharply, and the damage load is further reduced. On the contrary, if the pressure is too small, the current density will rise sharply to cause splashing or “ignition” and the damage load will also decrease. Adjust the corresponding preload time and appropriate electrode pressure.
3. Ensure the sealing of welded joints, and the range of process parameters is very wide. Compared with welding pressure and welding time, welding pressure is important. Make sure the welding pressure is not too low.
4. When the welding current and welding pressure are the same, as the welding time increases until it increases to the level of overheating, the deformation increases. When the current exceeds a certain value, continue to increase the welding time, and heap changes will occur in the lower part of the nut. The effect of welding pressure on thread deformation is relatively small. It is worth noting that the uniformity of applied welding pressure has a certain guarantee on welding quality.
Suzhou Agera Automation Equipment Co., Ltd. is an enterprise engaged in the development of automated assembly, welding, testing equipment and production lines. It is mainly used in home appliance hardware, automobile manufacturing, sheet metal, 3C electronics industries, etc. According to customer needs, we can develop and customize various welding machines, automated welding equipment, assembly and welding production lines, assembly lines, etc., to provide appropriate automated overall solutions for enterprise transformation and upgrading, and help enterprises quickly realize the transformation from traditional production methods to mid-to-high-end production methods. Transformation and upgrading services. If you are interested in our automation equipment and production lines, please contact us: leo@agerawelder.com
Post time: Jan-30-2024