Invention Grant
- Patent Title: Method for press punching a hole in sheet metal and press die
- Patent Title (中): 冲压金属板和冲压模具孔的方法
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Application No.: US10320708Application Date: 2002-12-17
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Publication No.: US08087333B2Publication Date: 2012-01-03
- Inventor: Masatoshi Oishi
- Applicant: Masatoshi Oishi
- Applicant Address: JP Saeki-Gun, Hiroshima JP Minato-Ku, Tokyo
- Assignee: Ones Co., Ltd.,Oiles Corporation
- Current Assignee: Ones Co., Ltd.,Oiles Corporation
- Current Assignee Address: JP Saeki-Gun, Hiroshima JP Minato-Ku, Tokyo
- Agency: Nixon & Vanderhye PC
- Main IPC: B26F1/14
- IPC: B26F1/14
Abstract:
A punch unit for a press die is provided for punching a hole in sheet metal. The punch unit includes a piercing punch provided with a sharp projection, a plunger for pressing the piercing punch, a cylinder for supporting the piercing punch and the plunger slidably in a punching direction, and a coil spring for retracting the piercing punch and the plunger. Also disclosed is a press die for punching a hole in sheet metal using the punch unit.
Public/Granted literature
- US20040112188A1 Method for press punching a hole in sheet metal and press die Public/Granted day:2004-06-17
Information query
IPC分类:
