Invention Grant
- Patent Title: Manufacturing method for metal member with through hole
- Patent Title (中): 具有通孔的金属构件的制造方法
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Application No.: US11791848Application Date: 2006-02-14
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Publication No.: US08459077B2Publication Date: 2013-06-11
- Inventor: Shoichi Abe , Yasushi Watanabe , Kazumi Shimoii , Atsushi Tomizawa , Mitsutoshi Uchida
- Applicant: Shoichi Abe , Yasushi Watanabe , Kazumi Shimoii , Atsushi Tomizawa , Mitsutoshi Uchida
- Applicant Address: JP Tokyo JP Tokyo JP Osaka-shi JP Kashima-shi
- Assignee: NSK Ltd.,NSK Steering Systems Co., Ltd.,Sumitomo Metal Industries, Ltd.,Sumitomo Pipe & Tube Co., Ltd.
- Current Assignee: NSK Ltd.,NSK Steering Systems Co., Ltd.,Sumitomo Metal Industries, Ltd.,Sumitomo Pipe & Tube Co., Ltd.
- Current Assignee Address: JP Tokyo JP Tokyo JP Osaka-shi JP Kashima-shi
- Agency: Crowell & Moring LLP
- Priority: JP2005-037851 20050215; JP2005-040175 20050217; JP2006-025296 20060202
- International Application: PCT/JP2006/002543 WO 20060214
- International Announcement: WO2006/088023 WO 20060824
- Main IPC: B21D26/00
- IPC: B21D26/00

Abstract:
To form a through hole at one portion of a side wall, of an expanded portion made by plastically deforming one part of a metal tube radially outward, in a portion where the plate thickness gradually changes, a slide tool is withdrawn from inside a punch hole while applying hydraulic pressure to the inside of the side wall. At the instant of commencing withdrawal of the slide tool, the degree of progress in the shearing for the portions of the side wall matching with the two side edges of the punch hole is made different. Then, the timing for moving from shearing to rupture is made to coincide, so that of the side wall, the portions matching with the punch hole, are made reliably into a blank, and are extracted from the side wall.
Public/Granted literature
- US20090038428A1 Metal Member With Through Hole And Manufacturing Method Therefor Public/Granted day:2009-02-12
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