发明名称 |
METHOD OF MAKING A SEAMLESS HOT-FINISHED STEEL PIPE, AND DEVICE FOR CARRYING OUT THE METHOD |
摘要 |
In a method of making a seamless hot-finished steel pipe a billet heated to a shaping temperature is pierced by a first shaping to a thick-walled hollow ingot which subsequently undergoes a radial forging process using an internal tool inserted in the hollow ingot and at least two forging jaws of a forging machine. The forging jaws act on the outer surface area of the hollow ingot, wherein the hollow ingot is turned and axially advanced in a clocked manner in the idle stroke phase of the forging jaws.
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申请公布号 |
US2009044883(A1) |
申请公布日期 |
2009.02.19 |
申请号 |
US20050577935 |
申请日期 |
2005.10.25 |
申请人 |
V & M DEUTSCHLAND GMBH |
发明人 |
PRASSER CHRISTOPH;KUMMERLING ROLF;WIEDENMAIER STEFAN;LEFEBVRE PIERRE;WIESER RUPERT;KOPPENSTEINER ROBERT |
分类号 |
C21D9/08;B21J7/16 |
主分类号 |
C21D9/08 |
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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