| 发明名称 |
METHOD FOR SHAPING BRANCH PIPE WITH INCREASED WALL THICKNESS |
| 摘要 |
FIELD: plastic metal working. SUBSTANCE: method comprises steps of spinning branch pipes and simultaneously cutting off their ends; placing ring with radially arranged openings to die in order to increase thickness of wall of branch pipe. Material of shaped blank penetrates to said radially arranged opening and serves as rivets. EFFECT: enhanced reliability of nondetachable joining. 3 dwg
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| 申请公布号 |
RU2117542(C1) |
申请公布日期 |
1998.08.20 |
| 申请号 |
RU19970112765 |
申请日期 |
1997.07.29 |
| 申请人 |
SARATOVSKOE AKTSIONERNOE PROIZVODSTVENNO-KOMMERCHE;SKOE OBSHCHESTVO NEFTEMASH SAP |
发明人 |
ZELENOV G.A.;SHIMCHUK F.S.;MOLOCHNIKOV N.D.;FADEEV E.V. |
| 分类号 |
B21C37/28;B21D22/16;(IPC1-7):B21C37/28 |
主分类号 |
B21C37/28 |
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