发明名称 |
Die cushion device of pressing machine |
摘要 |
In a die-cushion device of a press machine a controller controls an opening degree of a proportional flow-rate control valve to an appropriate opening degree in order to control the flow rate flowing out of a lower chamber of a hydraulic cylinder supporting a cushion pad before a slide collides against the cushion pad using a die-cushion pressure command commanded from a commander in advance and a slide speed signal inputted from a slide speed detector. By this, generation of a surge pressure when a slide collides against the cushion pad at a high speed is restricted. |
申请公布号 |
US8127590(B2) |
申请公布日期 |
2012.03.06 |
申请号 |
US20050719337 |
申请日期 |
2005.11.14 |
申请人 |
KOHNO YASUYUKI;HASEBA KATSUNORI;HASEBA JUNKO;AIDA ENGINEERING, LTD. |
发明人 |
KOHNO YASUYUKI;HASEBA KATSUNORI;HASEBA JUNKO |
分类号 |
B21J9/18 |
主分类号 |
B21J9/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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