发明名称 |
Method for hot pressing of workpieces |
摘要 |
A hot-forming machine for the hot-pressing of workpieces comprises a die (5), an associated extendable and retractable ejector (7) and a forwardly and backwardly movable press ram (1). The ejector (7) is connected to a control piston (8) arranged displaceably in a pressure chamber (28). Liquid can flow out of the pressure chamber (28) via a liquid outlet bore (24) and a liquid discharge line (23). By means of a throttle (25) arranged in the liquid discharge line (23) the outflow of liquid and therefore the repulsion of the extended ejector (7) by the forwardly moving press ram (1) are delayed in such a way that a workpiece (4) arranged between ejector (7) and press ram (1) is pre-upset and descaled outside the die (5).
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申请公布号 |
US6286350(B1) |
申请公布日期 |
2001.09.11 |
申请号 |
US20000673685 |
申请日期 |
2000.10.19 |
申请人 |
HATEBUR UMFORMMASCHINEN AG |
发明人 |
SCHOENENBERGER RAYMOND;MATT ANDREAS;SUTER MICHAEL |
分类号 |
B21J1/04;B21J5/00;B21J5/08;B21J13/14;(IPC1-7):B21J5/06 |
主分类号 |
B21J1/04 |
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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