A press working device moving at a large moving speed in a first stroke step to lead a workpiece to a working and providing a large pressing force in a second stroke step where the state of working is established, comprising a first small diameter cylinder and a second large diameter cylinder, wherein, in the first stroke step, the moving speed of a first piston inside the first cylinder is made equal substantially to the moving speed of the second piston inside the second cylinder and, in the second stroke step, a pressing force against the workpiece based on the movement of the second piston is increased according to the Pascals principle.

Title
Booster and press working device
Application Number
1020017016300
Publication Number
1020020043194
Application Date
December 19, 2001
Publication Date
June 8, 2002
Inventor
Kaneko Hiromitsu
Futamura Shoji
Assignee
Institute Of Technology Precision Electrical Discharge Works
IPC
B30B 15/00