发明名称 |
Process for the production of metal pipes |
摘要 |
A process for the production of metal pipes is described in which a thin-walled metal band inclined toward cold spots is gradually formed into a slotted pipe, the longitudinal edges lying flush against one another are welded to one another, and the welded pipe is reduced in its diameter. The forming of the metal band into the slotted pipe is done by opposing metal forming rollers or forming cylinders cooperating pairwise. The forming rollers or forming cylinders guide the metal band to be deformed in its edge area with rolling friction between them. Therein the forming and guiding of the metal band is done with forming rollers and/or forming cylinders and the reduction with rollers whose surface hardness is greater than 100 GPa.
|
申请公布号 |
US6513699(B2) |
申请公布日期 |
2003.02.04 |
申请号 |
US20010771635 |
申请日期 |
2001.01.30 |
申请人 |
NEXANS |
发明人 |
HARTEN FRIEDRICH;MEYER MICHAEL |
分类号 |
B21C3/08;B21C37/08;B21D5/12;(IPC1-7):B21D39/02 |
主分类号 |
B21C3/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|