发明名称 |
INNER-SURFACE CONTROL TOOL, PLUG, MANDREL, HOT-ROLLING MILL, PUNCHING PRESS, AND DRAW BENCH |
摘要 |
An inner surface regulation tool includes a mandrel, a plug which is detachably connected to the mandrel, and a connection member which connects the plug and the mandrel by a magnetic force. One of the plug and the mandrel includes a column-shaped portion which extends in an axial direction of the one, and the other of the plug and the mandrel includes a joining hole which extends in an axial direction of the other and into which the column-shaped portion is inserted. In addition, the connection member is a permanent magnet which is attached to at least one of the column-shaped portion and the joining hole. |
申请公布号 |
EP2889091(A4) |
申请公布日期 |
2016.03.30 |
申请号 |
EP20130830546 |
申请日期 |
2013.08.22 |
申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
YAMANE KOUJI;SHIMODA KAZUHIRO;YAMAKAWA TOMIO;INOUE YUJI |
分类号 |
B21B25/06;B21B19/04;B21C1/24;B21C3/16;B21C23/08;B21C25/04 |
主分类号 |
B21B25/06 |
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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