| 摘要 |
A die cushion device includes a cylinder having a closed one end and the other end with a through-hole. A push rod is inserted into the cylinder through the through-hole and is freely movable in the axial direction of the cylinder. The interior of the cylinder is partitioned by a bellows into a liquid chamber communicating with the through-hole and housing a part of the push rod, and a gas chamber located on the closed end side of the cylinder. Operation liquid is filled in the liquid chamber. Gas is sealed in the gas chamber and pressurizes, through the bellows and the liquid, the push rod in a direction of projecting from the cylinder.
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