发明名称 |
OVAL CROSS SECTION METAL TUBE PRODUCING DEVICE AND PRODUCING METHOD |
摘要 |
<p>It is an object of the present invention to provide a novel aluminum tube of an oval cross section that has a wider range of applications and added values. A disk-shaped metal slug (21) is impact-extruded with the use of a die (14) and a punch (13) each having an optimally designed structure to form a metal tube (T) integrally including a mouth, a shoulder and a body of an oval cross section. A hem portion of the oval body of the tube (T) thus formed and hardened by the impact extrusion is once deformed into a circular shape, and then trimmed off by a turning operation. <IMAGE></p> |
申请公布号 |
EP1586389(A1) |
申请公布日期 |
2005.10.19 |
申请号 |
EP20030771321 |
申请日期 |
2003.07.25 |
申请人 |
TAISEI KAKO CO., LTD. |
发明人 |
MAEDA, YUJI;MIYOSHI, SIGETOMI;YAMAGUCHI, TAKAHIRO |
分类号 |
B21C23/18;B65D35/06;B21C23/00;B21C23/08;B21C23/21;B21C25/02;B21J5/06;B21K21/04;B30B5/00;(IPC1-7):B21C23/18 |
主分类号 |
B21C23/18 |
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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