BOOSTER AND PRESS WORKING DEVICE

摘要

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 Pascal's principle.