... StrucureThis machine consists of two parts, mainframe and control cabinet.6.1 Mainframe is composed by upper ... (base), oil cylinder, piston, upper and lower plates and four upright posts. The upper beam is ... a upper bearing plate. Upper and lower plates are rubbed down after being heating processed. ... grinded to a certain fit clearance.6.2 control cabinet, oil pump, high precision electro-hydraulic ...