发明申请
- 专利标题: Die cushion mechanism, and device and method for controlling the same
- 专利标题(中): 模具缓冲机构及其控制装置及方法
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申请号: US11478633申请日: 2006-07-03
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公开(公告)号: US20070006632A1公开(公告)日: 2007-01-11
- 发明人: Yasusuke Iwashita , Tadashi Okita , Hiroyuki Kawamura , Satoshi Ikai
- 申请人: Yasusuke Iwashita , Tadashi Okita , Hiroyuki Kawamura , Satoshi Ikai
- 专利权人: FANUC LTD
- 当前专利权人: FANUC LTD
- 优先权: JP2005-196455 20050705
- 主分类号: B21D24/10
- IPC分类号: B21D24/10
摘要:
A device for controlling a die cushion mechanism including a servo-motor as a drive source and producing a force adapted to be applied to a slide in a press machine. The device includes a section for commanding a force to be produced by the die cushion mechanism; a section for detecting a force produced by the die cushion mechanism and applied to the slide; a section for detecting a moving speed of the slide; and a section for executing a force control on the servo-motor. The force controlling section executes force controls in mutually different modes on the servo-motor, through mutually different control loops, one mode being provided for an initial stage defined from an instant when the die cushion mechanism starts producing the force to be applied to the slide until a predetermined subsequent instant, and another mode being provided for a succeeding stage defined after the predetermined subsequent instant, by using at least a slide-speed detected value detected by the slide-speed detecting section. The force controlling section includes a section for preparing a first speed-command value to be commanded to the servo-motor in the initial stage and a second speed-command value, different from the first speed-command value, to be commanded to the servo-motor in the succeeding stage