发明名称 |
DEEP DRAW MOULDING METHOD AND MOULDING METAL DIE THEREFOR |
摘要 |
The present invention provides a deep-drawing method and a forming die therefor which can prevent the occurrence of cup side wall wrinkles and the collapse of the bottom during the process of deep-drawing a blank and which can increase the drawing ratio. A wrinkle pressing surface of a pressure pad (1) or an upper surface of a draw die (2) includes a flat inner edge surface (11), a tapered surface (12) which becomes deeper as the surface advances from the flat inner edge surface toward an outer circumference, a deepest flat surface (13), and a flat outer edge surface (14), which are provided in that order from an inner edge through which a draw punch passes toward an outer edge. |
申请公布号 |
EP2859965(A4) |
申请公布日期 |
2016.01.13 |
申请号 |
EP20130800285 |
申请日期 |
2013.06.05 |
申请人 |
TOYO SEIKAN GROUP HOLDINGS, LTD. |
发明人 |
TOMARU, HIDEKAZU;OKABE, NOBUHISA;OONISHI, HIRONORI |
分类号 |
B21D22/22;B21D24/04 |
主分类号 |
B21D22/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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