Title:
Welded tube welding equipment
Document Type and Number:
Japanese Patent JP6097784
Kind Code:
B2
Abstract:
An apparatus for manufacturing electric resistance welded pipe, in which two across-opening-facing end parts (2a, 2b) of an open pipe (1) including an opening (2) extending in a running direction are melted by an induction current generated by an induction heating means and joined together at a join portion. The induction heating means includes a first induction coil (3), and the first induction coil (3) is disposed above the opening (2) so as not to encircle the outer circumference of the open pipe (1) and so that a primary current circuit is formed straddling the opening (2).
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| JPH04284983 | HIGH-FREQUENCY RESISTANCE WELDING METHOD |
Inventors:
Yoshiaki Hirota
Application Number:
JP2015094351A
Publication Date:
March 15, 2017
Filing Date:
May 01, 2015
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
International Classes:
B23K13/08; B23K13/02
Domestic Patent References:
| JP54143744A | ||||
| JP201216749A | ||||
| JP61140385A | ||||
| JP63211587A |
Foreign References:
| EP0613751A1 | ||||
| US5571437 | ||||
| US2692322 | ||||
| US4845326 |
Attorney, Agent or Firm:
Patent Service Corporation Taiyo International Patent Office