WRINKLE GENERATION DETECTION DEVICE, DIE CUSHION DEVICE AND METAL MOLD PROTECTION DEVICE, AND WRINKLE GENERATION DETECTION METHOD, AUTOMATIC DIE CUSHION FORCE SETTING METHOD AND METAL MOLD PROTECTING METHOD

摘要

To provide a wrinkle generation detection device which can continuously detect a generation state of wrinkles during a period from the start time to the end time of formation of a material.SOLUTION: In a press machine having a die cushion device which supports a cushion pad, and generates a die cushion force when a slide of the press machine is lowered, a wrinkle generation detection device 550 comprises: a slide position detector 114 which detects a height position of the slide; a cushion pad position detector 224 which detects a height position of the cushion pad; and a computing unit 554 which continuously calculates a deviation between the height position of the slide detected by the slide position detector 114 and the height position of the cushion pad detected by the cushion pad detector 224 during a period from the start time of formation of a material by lowering of the slide to the end time of formation thereof. This wrinkle generation detection device detects wrinkles which are generated in the material on the basis of increase in the deviation which is continuously calculated by the computing unit 554.SELECTED DRAWING: Figure 4