Title:
GAS SHIELDED ARC WELDING CONTROL METHOD AND CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/188124
Kind Code:
A1
Abstract:
Provided is a gas shielded arc welding control method providing excellent bead appearance while suppressing the generation of sputter when molten droplets become detached, without short circuiting the molten droplets and a molten pool. This gas shielded arc welding control method of controlling a welding current by detecting the time at which a molten droplet becomes detached from the tip end of a welding wire includes a step of providing a normal arc period during which the welding current is maintained at a set current Icc, and a step of providing a detachment control period during which the welding current is controlled under prescribed conditions, after the time at which the molten droplet becomes detached has been detected in the normal arc period. During the detachment control period, at least any one short circuit prevention control is performed from among (a) prescribed output voltage control, (b) prescribed feed speed control, and (c) prescribed gas ratio control.
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Inventors:
JO BAINI
NAKATSUKASA SHOGO
OGAWA AKIRA
SATO EIJI
NAKATSUKASA SHOGO
OGAWA AKIRA
SATO EIJI
Application Number:
PCT/JP2019/009356
Publication Date:
October 03, 2019
Filing Date:
March 08, 2019
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
B23K9/095; B23K9/12; B23K9/16
Foreign References:
| JP2014073521A | 2014-04-24 | |||
| JP2008246524A | 2008-10-16 | |||
| JP2011088209A | 2011-05-06 | |||
| JP2009233728A | 2009-10-15 | |||
| JP2008246524A | 2008-10-16 | |||
| JP2018062123A | 2018-04-19 |
Other References:
See also references of EP 3778090A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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