The welding is composed of the following parts:frame,movable and stationary platens with clamping devices,magnifying,control device,transmission mechanism,guide,adjusting device,pneumatic and
hydraulic pressure system,cooling water system,welding transformer,button switch panel and control cabinet etc.The clamping device is operated by pneumatic pressure in initial pressing and by
hydro-pneumatic pressure in advanced pressing.Under the condition of an equal clamping force,this sort of pressure system is more compact than the single pneumatic pressure type and has a quicker
clamping speed as compared with the single hydraulic pressure type.
http://www.autoweldingmachine.com