发明授权
- 专利标题： Method of making an internal grooved tube
- 专利标题（中）： 制造内部沟槽管的方法
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申请号： US10634175申请日： 2003-08-04
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公开(公告)号： US06913074B2公开(公告)日： 2005-07-05
- 发明人: Koji Yamamoto , Tetsuya Sumitomo , Yasutoshi Mori , Toshiaki Hashizume
- 申请人： Koji Yamamoto , Tetsuya Sumitomo , Yasutoshi Mori , Toshiaki Hashizume
- 申请人地址： JP Tokyo
- 专利权人： The Furukawa Electric Co., Ltd.
- 当前专利权人： The Furukawa Electric Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Knobbe Martens Olson & Bear LLP
- 优先权： JP2000-050090 20000225
- 主分类号： B21C1/22
- IPC分类号： B21C1/22 ; B21C3/08 ; B21C3/16 ; B21C37/20 ; F28F1/40 ; B21C1/24 ; F28F1/14
摘要：
A method of manufacturing an internal grooved tube according to the present invention includes the steps of inserting a grooved plug into a blank tube rotatably, and then pressing the blank tube against the outside surface of the grooved tube with several balls revolving both around the circumference of the blank tube and on its axis in location of the grooved plug inserted, while drawing out the blank tube longitudinally in one direction, wherein the number of balls is limited to 2 to 3. A lead angle θ of the grooves to the tube axis is preferably limited to 26 to 45 degrees.
公开/授权文献
- US20040049917A1 Method of making an internal grooved tube 公开/授权日：2004-03-18
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