Patent ID: 9669446
Date: 2017-06-06
CPC Classifications: B21D,B30B,G05B

Claim:
1. A die cushion apparatus comprising: a cushion pad supported by drive shafts; die cushion force generators coupled to the drive shafts, respectively, and configured to generate die cushion forces at positions of the cushion pad, respectively, each position of which is supported by corresponding one of the driving shafts which is coupled to corresponding one of the die cushion force generators; a first input device configured to receive one die cushion force; a second input device configured to receive additional information in order to numerically compute the die cushion forces to be generated at the positions of the cushion pad, respectively; a computing device configured to numerically compute the die cushion forces to be generated at the respective positions of the cushion pad based on the one die cushion force from the first input device and the additional information from the second input device; a die cushion force command device configured to generate die cushion force commands for the die cushion force generators, respectively, based on the die cushion forces from the computing device; and a die cushion force controller configured to control each of the die cushion force generators based on corresponding one of the of die cushion force commands from the die cushion force command device to cause the die cushion force generators to generate the die cushion forces, respectively.