发明名称 |
RÖHREN FÜR WÄRMETAUSCHER UND VERFAHREN ZU DEREN HERSTELLUNG |
摘要 |
A tube for heat exchangers, in which roll forming is used to form a bead compartmenting medium flow passages in a tube and a thickness (B) of the bead base is made larger than that of a stock plate for the tube. The roll forming comprises a first step of bending and forming the plate successively in a concave form to provide a planned bead portion as an intermediate formed bead portion, a second step of drawing the planned bead portion laterally, and a third step of compressing the planned bead portion after the second step in a bead heightwise direction. A width (w') of recesses of the planned bead portion (21a) in the first step is made larger than a width (w) of recesses of beads (21) after forming, and a height (h') of the planned bead portion (21b) after the second step is made larger than a height (h) of the bead (21) after forming. Accordingly, methods of manufacturing a heat exchanger tube, in which bases of beads are enhanced in pressure resisting property, and a heat exchanger tube, in which unevenness of the plate can be reduced when beads are formed, are obtained. <IMAGE> |
申请公布号 |
DE69821372(T2) |
申请公布日期 |
2004.10.28 |
申请号 |
DE1998621372T |
申请日期 |
1998.08.06 |
申请人 |
ZEXEL VALEO CLIMATE CONTROL CORP., SAITAMA |
发明人 |
KATO, SOICHI;SAKURADA, MUNEO;KURIHARA, SHIN;HAIYA, SADAO;SUGITA, TAKASHI;AKIYAMA, SHOJI;UMEHARA, TAKAHUMI |
分类号 |
F28F1/02;B21D53/04;F28D1/03;(IPC1-7):F28F1/02;B21C37/08;F28F3/04;B21C37/15 |
主分类号 |
F28F1/02 |
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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