发明申请
US20090199924A1 Cold roll forming method for reducing a diameter of a metal pipe, and a metal pipe product having its diameter reduced by such method
审中-公开
用于减小金属管的直径的冷轧成形方法以及通过这种方法减小其直径的金属管制品
- 专利标题： Cold roll forming method for reducing a diameter of a metal pipe, and a metal pipe product having its diameter reduced by such method
- 专利标题（中）： 用于减小金属管的直径的冷轧成形方法以及通过这种方法减小其直径的金属管制品
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申请号： US12314861申请日： 2008-12-17
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公开(公告)号： US20090199924A1公开(公告)日： 2009-08-13
- 发明人: Tsuyoshi Ishikawa , Yoshiya Tsukada , Ryoichi Suzuki , Akihiro Ishikawa , Motoyoshi Ishikawa , Jun Ishikawa
- 申请人： Tsuyoshi Ishikawa , Yoshiya Tsukada , Ryoichi Suzuki , Akihiro Ishikawa , Motoyoshi Ishikawa , Jun Ishikawa
- 专利权人： Nakayama Corporation
- 当前专利权人： Nakayama Corporation
- 优先权： JP2000-290861 20000925
- 主分类号： F16L9/00
- IPC分类号： F16L9/00 ; B21B13/08
摘要：
A cold roll forming method for reducing a diameter of a metal pipe and a metal pipe product having a diameter reduced by such a method are disclosed, wherein the method includes: passing a raw metal pipe through a set of pre-forming rolls so that it can be pre-formed into an intermediate metal pipe having an elliptical, elongated circular or rectangular cross-sectional shape; and then passing the intermediate metal pipe through a set of diameter-reducing rolls disposed on a downstream side of the set of pre-forming rolls so that it can have its outer circumferential length reduced to be smaller than an outer peripheral length of the raw metal pipe, while at the same time being re-formed into a circular cross-sectional shape or any other cross-sectional shape different from the cross-sectional shape of the intermediate metal pipe.
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