| 发明名称 |
Plastic working dies for cylindrical parts |
| 摘要 |
When cylindrical parts are produced by extrusion from a metallic material having high mechanical strength, the dies tend to be easily broken and worn, and it is difficult to secure accuracy of finishing of the product.
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| 申请公布号 |
US4018075(A) |
申请公布日期 |
1977.04.19 |
| 申请号 |
US19760682044 |
申请日期 |
1976.04.30 |
| 申请人 |
HITACHI, LTD. |
发明人 |
KAWAWA, HIROYUKI;OHUCHI, YASUSHI;KANAMARU, HISANOBU |
| 分类号 |
B21C25/02;B21C25/04;B21C35/02;B21J5/06;B21K21/00;B21K21/16;(IPC1-7):B21C3/00 |
主分类号 |
B21C25/02 |
| 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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