Title:
RESISTIVE SPOT-WELDING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/069268
Kind Code:
A1
Abstract:
A resistive spot-welding method with which a welded joint having anti-delay-fracture properties can be formed, wherein the method is provided with a step for providing energization via an energizing current I1 (kA) while a welding pressure P1 (kN) is applied to a plurality of steel plates using a welding electrode, a step for providing energization via an energization current Ic (kA) over a cooling time period tc (s) while the welding pressure P1 is applied, a step for imparting a welding pressure P2 (kN) onto the plurality of steel plates using the welding electrode over a welding time period tf (s) while energizing the welding electrode with a conduction current I2 (kA) and immediately thereafter raising and lowering the welding pressure in two or more cycles in which a welding pressure P3 (kN) is applied over a welding pressure time period ti (s), a step for applying the welding pressure P2 over the welding pressure time period tf, and a step for releasing the welding pressure and ending energization, the steps being provided in the stated order. 0≦Ic
Inventors:
FURUSAKO SEIJI (JP)
Application Number:
PCT/JP2016/081352
Publication Date:
April 27, 2017
Filing Date:
October 21, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B23K11/11; B23K11/16
Domestic Patent References:
WO2014173472A1 | 2014-10-30 | |||
WO2007077393A2 | 2007-07-12 |
Foreign References:
JP2013071124A | 2013-04-22 | |||
JP2010247215A | 2010-11-04 | |||
JP2010240740A | 2010-10-28 | |||
US20130020288A1 | 2013-01-24 |
Other References:
See also references of EP 3366408A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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