| 发明名称 |
Pipe expanding method and pipe expanding device for steel pipe |
| 摘要 |
A pipe expanding device inserts a pipe expanding punch into an opening end portion of a steel pipe with a special shape in the state where the opening end portion of the steel pipe with a special shape is pressed in an insertion direction of the punch.
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| 申请公布号 |
US8365571(B2) |
申请公布日期 |
2013.02.05 |
| 申请号 |
US20070282903 |
申请日期 |
2007.05.14 |
| 申请人 |
KOMATSU LTD.;NOGUCHI TAKAHIRO;ITO TATSUSHI;KAWAHARA FUMIAKI |
发明人 |
NOGUCHI TAKAHIRO;ITO TATSUSHI;KAWAHARA FUMIAKI |
| 分类号 |
B21D39/08;B21C37/16 |
主分类号 |
B21D39/08 |
| 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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