发明名称 |
Process and apparatus for upsetting pipe ends |
摘要 |
A process and apparatus for upsetting pipe ends, in particular drill rod pipe ends forming tool joints. The pipe end is held in a bottom die of a press and a shoulder mandrel is axially driven into the pipe end by a ram thereby simultaneously upsetting and filling the empty space between the die and the pipe end. The process includes at least two steps. In a first step the pipe end is upset on the outside into a cylindrical pipe section of larger diameter and a defined conical transition region while the internal diameter remains unchanged. In a second step the upset pipe section is swaged inwardly by means of a swaging tool mounted on the ram of the press.
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申请公布号 |
US4192167(A) |
申请公布日期 |
1980.03.11 |
申请号 |
US19780933920 |
申请日期 |
1978.08.15 |
申请人 |
LAEIS WERKE AG |
发明人 |
HUEBNER, BERNHARD;TRESSER, DIETFRIED |
分类号 |
B21D41/00;B21D41/04;B21J5/08;B21J9/08;B21K21/12;(IPC1-7):B21D22/00 |
主分类号 |
B21D41/00 |
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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