Die cushion apparatus of press machine

Abstract

A die cushion apparatus of a press machine which makes possible to manufacture a plurality of types of products of different sizes by one press machine and capable of minimizing a production facility, and which comprises a plurality of die cushion units, each having a cushion pad and a rise and fall drive unit for vertically driving the cushion pad, that are aligned in a direction perpendicular to a work conveying direction, and a control unit capable of individually and independently controlling the plurality of die cushion units.

1 . A die cushion apparatus of a press machine comprising; 
 a plurality of die cushion units each having a cushion pad and an elevating drive unit that vertically moves the cushion pad, aligned in a bed in a direction perpendicular to a work conveying direction.    
     
     
         2 . The die cushion apparatus of the press machine according to  claim 1 , further comprising a control unit capable of individually and independently controlling the plurality of die cushion units.  
     
     
         3 . The die cushion apparatus of the press machine according to  claim 2 , wherein the control unit controls the plurality of die cushion units in synchronism with each other that are operated for a work common to each other.