Device and method of shim adjusting of die-cushion device

A shim adjusting device of a die-cushion device having a cushion pad configured to support a blank holder through a plurality of die-cushion pins and a cushion-pad elevating mechanism configured to support the cushion pad and generate a die-cushion force when a slide of a press machine is lowered, the shim adjusting device comprising:

• a plurality of fluid pressure cylinders disposed on the cushion pad and disposed at positions faced with a plurality of die-cushion pin holes formed in a bolster of the press machine, a lower end of each of the plurality of die-cushion pins inserted into the plurality of die-cushion pin holes being in contact with a piston rod;
• a fluid pressure device configured to supply an operating fluid independently to each of rise-side pressurizing chambers of the plurality of fluid pressure cylinders, respectively, or discharge the operating fluid from the rise-side pressurizing chamber;
• and
• a shim adjustment control device configured to cause the operating fluid to be supplied independently from the fluid pressure device to rise-side pressurizing chambers of fluid pressure cylinders respectively corresponding to die-cushion pins to be used in the plurality of die-cushion pins inserted into the plurality of die-cushion pin holes, the die-cushion pins to be used transmitting a die-cushion force to the blank holder, and independently adjust a height direction position of the piston rod of each of the fluid pressure cylinders respectively corresponding to the die-cushion pins to be used, respectively.