Title:
OPEN TUBE EDGE PART PRE-HEATING DEVICE
Document Type and Number:
Japanese Patent JP3556061
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize a tube manufacturing method by solid phase pressure welding capable of securing high productivity without necessitating bead cutting and moreover manufacturing a steel tube having an excellent seam quality and surface property.
SOLUTION: This device is provided with an induction coil 11 arranged in the upstream of a work coil heating an open tube 1 up to a joining temperature at the joining point, an inductor 12 having at least two magnetic poles 13 and coiling the induction coil 11, and a high frequency power source feeding an high frequency electric current to the induction coil 11. In this case, at least one magnetic pole of the inductor is faced from the outer part of the open tube 1 to the slit part 10 of the open tube 1.
Inventors:
Takaaki Toyooka
Akira Yodo
Toshiaki Amagasa
Motoaki Itaya
Yuji Hashimoto
Nobuki Tanaka
Toshio Onishi
Akira Yodo
Toshiaki Amagasa
Motoaki Itaya
Yuji Hashimoto
Nobuki Tanaka
Toshio Onishi
Application Number:
JP33943296A
Publication Date:
August 18, 2004
Filing Date:
December 19, 1996
Export Citation:
Assignee:
jfe Steel Corporation
Mitsubishi Electric Corporation
Mitsubishi Electric Corporation
International Classes:
H05B6/10; B21C37/08; B23K13/00; B23K20/00; (IPC1-7): B21C37/08; B23K13/00; B23K20/00; H05B6/10
Domestic Patent References:
| JP3155478A | ||||
| JP4237513A | ||||
| JP5096384A |
Attorney, Agent or Firm:
Eiichi Kobayashi
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