| 发明名称 |
Method of production of bore in sandwiched metal sheets |
| 摘要 |
The method involves drilling a hole through the sheets and then using a tapered punch (7) to deform the inner edge of the hole in the upper sheet. The punch is opposed by a die (8) containing a ring (10) to form an eye (9) which is opened over the lower face of the lower sheet by an opposing press (12) to retain the sheets together. |
| 申请公布号 |
DE19810367(C1) |
申请公布日期 |
1999.08.26 |
| 申请号 |
DE1998110367 |
申请日期 |
1998.03.10 |
| 申请人 |
JOSEF WELSER OHG PROFILIER- UND STANZWERK |
发明人 |
PLANK, OTMAR |
| 分类号 |
B21C37/29;B21D39/03;B21J15/02;B21J15/04;(IPC1-7):B21D39/03;B21J15/10 |
主分类号 |
B21C37/29 |
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