Patent ID: 9586375
Date: 2017-03-07
CPC Classifications: B21D,B30B,H02K

Claim:
1. A press machine including an actuator capable of lowering a workpiece support unit from a press working position by a distance corresponding to a predetermined amount or more, and raising the workpiece support unit so as to be returned to the press working position after ejecting a workpiece, the press machine comprising: a bottom dead center position correction control section, which performs, based on a preset target bottom dead center position and a detected bottom dead center position obtained during a press operation, positional correction so that an actual bottom dead center position of a slide is adjusted to the preset target bottom dead center position; a selected bottom dead center position setting section, which sets a selected bottom dead center position selected as a position lower than the preset target bottom dead center position; and a bottom dead center position switching section, which switches the preset target bottom dead center position to the selected bottom dead center position in association with a raising and lowering operation association signal of the actuator, wherein the bottom dead center position correction control section is configured to perform, based on the selected bottom dead center position after the switching and the detected bottom dead center position, positional correction so that the actual bottom dead center position of the slide is adjusted to the selected bottom dead center position.