发明授权
- 专利标题: Method for producing seamless hot-rolled pipes in continuous pipe rolling mills
- 专利标题(中): 连续轧管机无缝热轧管生产方法
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申请号: US13885914申请日: 2011-09-19
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公开(公告)号: US09381554B2公开(公告)日: 2016-07-05
- 发明人: Rolf Kümmerling , Christoph Prasser , Gerd Homberg , Frank Hagemann , Gabriel Pereira , Winfried Braun
- 申请人: Rolf Kümmerling , Christoph Prasser , Gerd Homberg , Frank Hagemann , Gabriel Pereira , Winfried Braun
- 申请人地址: DE Düsseldorf
- 专利权人: VALLOUREC DEUTSCHLAND GMBH
- 当前专利权人: VALLOUREC DEUTSCHLAND GMBH
- 当前专利权人地址: DE Düsseldorf
- 代理机构: Henry M. Feiereisen LLC
- 优先权: DE102010052084 20101116
- 国际申请: PCT/DE2011/001782 WO 20110919
- 国际公布: WO2012/065585 WO 20120524
- 主分类号: B21B19/04
- IPC分类号: B21B19/04 ; B21B23/00 ; B21B17/04
摘要:
In a method for producing seamless pipes, a hot hollow block created previously in a piercing mill is stretched by means of a continuous rolling mill on a mandrel bar to form a parent pipe and the parent pipe is fed directly to a stretch reducing mill or sizing mill as a finishing mill, while forgoing an extracting mill and a reheating furnace, and is rolled there to the required final pipe diameter. The hollow block is pre-dimensioned in its length in such a manner that only a single length is produced as the required parent pipe length during the stretching in the continuous rolling mill and the parent pipe is pulled off of the mandrel rod by the finishing rolling during the subsequent finishing rolling, wherein the rolling is performed using rolling mill components that are designed in the dimensions thereof for handling single lengths.
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