发明授权
- 专利标题: Drawing mechanism for a press
- 专利标题(中): 新闻绘图机制
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申请号: US125924申请日: 1987-11-30
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公开(公告)号: US4821552A公开(公告)日: 1989-04-18
- 发明人: Siegfried Baur , Rudi Brandstetter , Gerhard Roos
- 申请人: Siegfried Baur , Rudi Brandstetter , Gerhard Roos
- 申请人地址: DEX Goeppingen
- 专利权人: L. Schuler, GmbH
- 当前专利权人: L. Schuler, GmbH
- 当前专利权人地址: DEX Goeppingen
- 优先权: DEX3640787 19861128
- 主分类号: B21D24/14
- IPC分类号: B21D24/14 ; B21D45/04 ; B21D22/00
摘要:
A drawing installation for a press which must produce the holding force during the drawing operation. The drawing ram displaces the sheet metal part and the sheet metal holder against the holding force and additionally must overcome at the beginning of the sheet metal deformation the inertia forces of the accelerated parts of the drawing installation. In order to avoid the forces which occur thereby in an impact-like manner, the piston rods transmitting the holding force and the ejector piston rods are pre-accelerated prior to the drawing ram. The piston rods each include an operating surface adapted to be acted upon in the drawing direction. The pressure spaces coordinated thereto are connected with a pressure quantity space each of a pre-acceleration cylinder and by way of a refill control with a pressure source. The control of the pre-acceleration cylinder and of the refill from the pressure source takes place in dependence on the movement of the drawing ram. The drawing installation can be used in presses with mechanically driven drawing rams and sheet metal holders retaining the sheet metal part whereby the functions of holding and ejection are carried out by separate pressure cylinders.
公开/授权文献
- US5368416A Building component for a noise barrier retaining wall 公开/授权日:1994-11-29
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