1. The setting machine is also called meson machine. Its working principle is that various accessories clamped on the electrode head contact with the steel plate, and the contact part generates resistance heat through large current, thus obtaining various functions corresponding to the requirements.

2. The principle that the forming machine pulls outward after welding is equivalent to the virtual knocking operation when the hammer and gasket work. The meson is welded on the lower outer side of the steel plate and pulled out to replace the pad iron pressed from the inner side.