Press having cushioning cylinders each having two chambers...

Details Press having cushioning cylinders each having two chambers... Press having cushioning cylinders each having two chambers...

B - Operations, Transporting

30

B

B30B 15/22 (2006.01) B21D 24/14 (2006.01) B30B 15/16 (2006.01) F16F 9/02 (2006.01) F16F 9/26 (2006.01)

Patent

CA 2151114

A press wherein a blank-holding force generated by cushioning cylinders is transmitted to a pressure member through cushion pins for holding a blank during a pressing operation by a die and a punch, and is controllable by a pressure adjusting device according to an optimum pattern of control by controlling a difference between fluid pressures in two pressure chambers of each cushioning cylinder whose volumes decrease and increase, respectively, as the cushion pins are lowered.

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