Title:
電縫管溶接装置及び電縫管溶接方法
Document Type and Number:
Japanese Patent JP7260785
Kind Code:
B2
Abstract:
To accurately detect welding abnormalities when manufacturing an electric-resistance welded pipe by welding using high-frequency power generated by switching.SOLUTION: Provided is an electric-resistance welded pipe welding device for molding a traveling steel sheet into a cylindrical open pipe, and welding both circumferential-directional end parts of the open pipe each other by high-frequency power, and that includes switches 121 to 124, and comprises: an inverter section 120 for converting and outputting direct-current power to the high-frequency power by switching the switches 121 to 124; a voltmeter 150 for measuring a voltage of the direct-current power inputted to the inverter section 120; and a determination section 202 for, based on a measurement result at the voltmeter 150, determining presence or absence of welding abnormalities.SELECTED DRAWING: Figure 2
Inventors:
Masato Taira
Masahide Hayashi
Masahide Hayashi
Application Number:
JP2019159337A
Publication Date:
April 19, 2023
Filing Date:
September 02, 2019
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B23K13/00; B21C37/08; B21C51/00; B23K13/02; B23K13/08
Domestic Patent References:
| JP2009113070A | ||||
| JP2000218380A | ||||
| JP2007326128A | ||||
| JP1120788A | ||||
| JP2014530106A |
Attorney, Agent or Firm:
Kanemoto Tetsuo
Koji Hagiwara
Naoki Ogita
Takashi Saito
Takuya Mine
Koji Hagiwara
Naoki Ogita
Takashi Saito
Takuya Mine
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