发明名称 |
PROCEDE DE FORMATION DES TUBES METALLIQUES ET ECHANGEUR DE FORME DE CES TUBES |
摘要 |
For conforming to a circular cross-section the end of a metallic tube 1 of oblong cross-section for a heat exchanger, a single step is performed consisting in forcibly driving a punch 5 into the tube end. The punch 5 has a cylindrical body 13 of circular cross-section with a diameter equal to that desired for the inner surface of the tube end, connected to a head 8 of curvilinear quadrangular cross-section through an intermediate portion 14 of progressively varying cross-section. <IMAGE> |
申请公布号 |
RO81367(A) |
申请公布日期 |
1983.06.01 |
申请号 |
RO19800101807 |
申请日期 |
1980.07.25 |
申请人 |
VALEO SOCIETE ANONYME FRANCAISE,FR |
发明人 |
COLLGON,CHARLES P.,FR |
分类号 |
B21D41/04;B21D41/02;B21D53/08;F28F9/16 |
主分类号 |
B21D41/04 |
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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