| 摘要 |
PROBLEM TO BE SOLVED: To provide a press apparatus in which a die cushion can be adequately controlled with respect to various loads and speeds.SOLUTION: A control part 21 performs a feed forward control based on a target value of a cylinder load and a cylinder load detected by a load detection part, the feed forward control being performed in accordance with the target value of the cylinder load and a cylinder speed detected by a speed detector and on the basis of amount of oil supplied to a hydraulic cylinder 9, which is read out from a map 27 of a storage part 26. As a result, even if a die cushion by the hydraulic cylinder with fluctuation of hydraulic pressure is used, a proper value can be provided by the feed forward control which is based on the map 27. |
