| 发明名称 |
EXPANSION-MOLDING METHOD AND EXPANSION-MOLDING DEVICE FOR STEEL PIPE |
| 摘要 |
In an expansion-molding device (10), a punch (12) is inserted into one opening end of a steel pipe (P) of a usual shape. The opening end of the steel pipe (P) is pressed by a side die (21).
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| 申请公布号 |
KR20080096589(A) |
申请公布日期 |
2008.10.30 |
| 申请号 |
KR20087022462 |
申请日期 |
2007.05.14 |
| 申请人 |
KOMATSU LTD. |
发明人 |
NOGUCHI TAKAHIRO;ITO TATSUSHI;KAWAHARA FUMIAKI |
| 分类号 |
B21D41/02;B21D39/08 |
主分类号 |
B21D41/02 |
| 代理机构 |
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代理人 |
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