According to the different technological characteristics of welding, the commonly used welding methods can be divided into three categories: fusion welding, pressure welding and brazing. Various welding methods can be used flexibly when the body sheet metal parts are combined into a body. Automotive sheet metal workers commonly used welding methods are as follows. ① Fusion welding includes: oxygen-acetylene gas welding, manual arc welding and carbon dioxide gas shielded welding. ② Pressure welding includes contact welding (spot welding and roll welding). ③ Brazing includes: tin brazing (soldering), aluminum brazing and brazing (brazing). Hope to adopt, thank you!