公开(公告)号：US09776273B2

公开(公告)日：2017-10-03

申请号：US14522909

申请日：2014-10-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Junji Fujiwara ,  Yasushi Mukai ,  Atsuhiro Kawamoto

IPC: B23K9/095 ,  B23K9/073 ,  B23K9/12 ,  B23K9/09

CPC classification number: B23K9/095 ,  B23K9/073 ,  B23K9/0732 ,  B23K9/09 ,  B23K9/124

Abstract: An arc-welding method in welding by repeating a short circuit and an arc. When the sign of opening of the short circuit is detected, the welding current is reduced from a first current value at the detection of the sign to a second current value, which is lower than the first current value. When the opening of the short circuit is detected, a pulse current having a peak value higher than the first current value is supplied at a plurality of times in the arc period. This suppresses porosities and spatters when galvanized steel sheets are welded.