- 专利标题: Hydraulic drawing cushion of a drawing press and method of operating the hydraulic cushion
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申请号: US14617289申请日: 2015-02-09
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公开(公告)号: US10507506B2公开(公告)日: 2019-12-17
- 发明人: Dieter Reisch , Michael Micklisch , Michael Richter
- 申请人: Schuler Pressen GmbH
- 申请人地址: DE Goppingen
- 专利权人: Schuler Pressen Gmbh
- 当前专利权人: Schuler Pressen Gmbh
- 当前专利权人地址: DE Goppingen
- 代理机构: Fitch, Even, Tabin & Flannery LLP
- 优先权: DE102014101616 20140210
- 主分类号: B21D24/02
- IPC分类号: B21D24/02 ; B21D24/14 ; F15B15/20
摘要:
A hydraulic drawing cushion (17) for a drawing press (10) includes at least one hydraulic cylinder (21) comprising a piston rod (27) that causes a total force (G) to act on the metal sheet holding ring (20). The hydraulic cylinder (21) comprises a hydraulic work circuit (37) to generate a hydraulic work force (A) in a work direction (Z) to act on a ring part (28) to which a force can be applied on both sides. Independently, a spring force (F) acts on the piston (26). The spring force (F) is neither controlled nor adjusted, but is preset. Preferably, the spring force (F) is exclusively a function of the position or location of the piston (26) relative to the cylinder housing (25). The total force (G) acting on the piston (26) results from the addition of the vectors of the work force (A) and the spring force (F).
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