Title:
PRODUCTION DEVICE OF RESISTANCE WELDED TUBE AND ITS PRODUCTION METHOD
Document Type and Number:
Japanese Patent JP3755922
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce defective difference in level by making a flow pattern of induction current flowing in a metal strip.
SOLUTION: A bent part 34 is formed to the part at the side of both butt faces 111, 112 of a coil wire 31 o a high frequency heating coil 3. By viewing the side of both butt face 111, 112, the bent part 34 is made projecting in the forwarding side of a metal strip 1 and is bent roughly symmetrical to the axial line of the metal strip bent cylindrical shape. This method prevents the induction current from concentrating to both butt faces 111, 112 so as to suppress softening of both butt faces. Accordingly, deformation of both butt faces is suppressed, defective difference in level is reduced.
Inventors:
Akira Mizutani
Kazuhiro Mitsukawa
Yoshihiro Nakamura
Kazuhiro Mitsukawa
Yoshihiro Nakamura
Application Number:
JP4349796A
Publication Date:
March 15, 2006
Filing Date:
February 29, 1996
Export Citation:
Assignee:
株式会社デンソー
International Classes:
B23K13/02; H05B6/10; B21C37/08; B23K13/08; H05B6/36; (IPC1-7): B23K13/08; B21C37/08; B23K13/02; H05B6/10; H05B6/36
Domestic Patent References:
| JP4182076A | ||||
| JP5655588U |
Attorney, Agent or Firm:
Yoji Ito