Hydraulic punch actuator with centering apparatus

摘要

A punch has a hydraulic actuating system incorporating reciprocal pumps and a reciprocal motor. The motor drives a punch secured to a punch plate or retainer into a die to cut friction pads from a sheet of material for placement in a carriage or directly onto a clutch plate. The punch retainer has a resting position during which the sheet of friction material is not contacted by the punch. To ensure the proper resting position, a plurality of power cylinders are pressurized to extend rod members to contact and position the punch retainer as required.