发明授权
- 专利标题： Method for manufacturing a worm shaft
- 专利标题（中）： 蜗杆轴的制造方法
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申请号： US11012188申请日： 2004-12-16
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公开(公告)号： US07231794B2公开(公告)日： 2007-06-19
- 发明人: Koji Kidowaki
- 申请人： Koji Kidowaki
- 申请人地址： JP Shizuoka-pref.
- 专利权人： ASMO Co., Ltd.
- 当前专利权人： ASMO Co., Ltd.
- 当前专利权人地址： JP Shizuoka-pref.
- 代理机构： Posz Law Group, PLC
- 优先权： JP2003-432347 20031226
- 主分类号： B21D17/04
- IPC分类号： B21D17/04 ; B21H3/12
摘要：
An object of the present invention is to provide a method of manufacturing a rotational shaft having a worm, wherein a worm portion has a small bending amount. According to the method of the invention, a worm portion is formed at a worm forming portion by a rolling process with rolling dies, and a small diameter portion is formed at least at one axial end of the worm forming portion, wherein a diameter of the small diameter portion is smaller than a diameter of a bottom of a worm tooth to be formed at the worm forming portion, so that surplus material portion of the worm forming portion can flow toward the small diameter portion.
公开/授权文献
- US20050138980A1 Worm shaft and method for manufacturing the same 公开/授权日：2005-06-30
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