发明授权
- 专利标题: Hydraulic press for forming metal plates
- 专利标题(中): 液压机用于成型金属板
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申请号: US026329申请日: 1998-02-19
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公开(公告)号: US6128987A公开(公告)日: 2000-10-10
- 发明人: Tatsuji Nakagawa , Itaru Fujimura , Hiroshi Hosoya , Junkichi Comikawa , Kazuhiko Fujimoto
- 申请人: Tatsuji Nakagawa , Itaru Fujimura , Hiroshi Hosoya , Junkichi Comikawa , Kazuhiko Fujimoto
- 申请人地址: JPX
- 专利权人: Aida Engineering Co., Ltd.
- 当前专利权人: Aida Engineering Co., Ltd.
- 当前专利权人地址: JPX
- 优先权: JPX9-091686 19970326
- 主分类号: B30B1/32
- IPC分类号: B30B1/32 ; B30B15/16 ; B30B15/24 ; B26D5/20 ; B21D31/02 ; B30B1/42
摘要:
A hydraulic press has closed loop feedback control on a slide, a slide pad and bolster cylinders. Hydraulic cylinders actuating various components of the press are controlled according to ideal position estimates to produce consistent and precise pressing action. A closed loop control consists of an ideal position/pressure value generator, a position/pressure detector and an arithmetic unit comparing the ideal and actual position/pressure values. Using the ideal and actual comparison result, the arithmetic unit produces a control signal to drive a cylinder to a desired position/pressure. The hydraulic press is capable of performing several operations on a workpiece in one press cycle, an improvement over presses requiring several operation steps or die changes. The bolster cylinders augment clamping force, reduce shock, and improve die alignment to produce better results with less wear on press components.