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1.发明公开THIN PLATE METAL PUNCHING DIE AND THIN PLATE METAL PUNCHING APPARATUS PROVIDED WITH THE DIE 有权薄板和舞蹈工具，工具提供的薄金属片DANCE DEVICE
公开(公告)号：EP2153915A4
公开(公告)日：2013-08-28
申请号：EP08751792
申请日：2008-05-22
申请人： ONES CO LTD , OILES INDUSTRY CO LTD
发明人： OISHI MASATOSHI , ARAMIZU TERUO
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2.发明公开PUNCH FOR THIN-PLATE METAL AND PUNCH DEVICE FOR THIN-PLATE METAL WITH THE PUNCH 有权冲床与PUNCH薄板薄板和冲压设备
公开(公告)号：EP1621268A4
公开(公告)日：2007-03-28
申请号：EP04729976
申请日：2004-04-28
发明人： OISHI MASATOSHI , UEMURA YUKIHARU , TSUJI HIROSHI
摘要： A punch (13) for thin-plate metal (8) has a punch body (25) and a cone-like projection (28). The cone-like projection (28) is integrally joined, at its bottom surface, with one end surface of the punch body. The bottom surface has a circular shape whose center is concentric with the center of an imaginary circle with which the outer edge of the one end surface is in internally contact and has the outer edge in internally contact with an imaginary circle having a smaller diameter than the imaginary circle with which the circular shape is concentric. An angle (theta) formed by a line that intersects the axis passing through the center of the imaginary circle with which the outer edge of the one end surface is in contact and is tangential to a tip-end surface of the projection and by the one end surface is not less than 25º and not more than 60º. Further, the ratio e/L is set not less than 0.05 and not more than 0.14, where (e) is the difference between the radius (D1)/2 of the imaginary circle with which the outer edge of the one end surface is in internally contact and the radius (d1)/2 of the imaginary circle with which the outer edge of the bottom surface is in internally contact, and (L) is the circumferential length of the imaginary circle with which the outer edge of the one end surface is in internally contact.
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