发明申请
- 专利标题： METHOD OF MANUFACTURING RECTANGULAR TUBE HAVING STEPPED PORTION
- 专利标题（中）： 制造具有步进部分的矩形管的方法
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申请号： US14229440申请日： 2014-03-28
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公开(公告)号： US20150273548A1公开(公告)日： 2015-10-01
- 发明人: Ryuji TANOUE , Hirokazu SASAKI , Naofumi NAKAMURA , Jun KUROBE
- 申请人： Ryuji TANOUE , Hirokazu SASAKI , Naofumi NAKAMURA , Jun KUROBE
- 申请人地址： JP Tokyo
- 专利权人： NISSHIN STEEL CO., LTD.
- 当前专利权人： NISSHIN STEEL CO., LTD.
- 当前专利权人地址： JP Tokyo
- 主分类号： B21B17/08
- IPC分类号： B21B17/08 ; B21B27/02
摘要：
A method of manufacturing a rectangular tube having a stepped portion includes: forming V-shaped grooves on a rectangular tube at surfaces of an end thereof in a direction parallel to a longitudinal direction thereof; and pressing each of the surfaces having the V-shaped grooves formed thereon with a rotating roll from outside to inside, whereby the end of the rectangular tube is radially reduced.
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