US 12,390,874 B2
Arc welding control method
Yuya Furuyama, Hyogo (JP); and Junji Fujiwara, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Oct. 16, 2020, as Appl. No. 17/072,859.
Application 17/072,859 is a continuation of application No. PCT/JP2019/016032, filed on Apr. 12, 2019.
Claims priority of application No. 2018-080130 (JP), filed on Apr. 18, 2018.
Prior Publication US 2021/0031293 A1, Feb. 4, 2021
Int. Cl. B23K 9/173 (2006.01); B23K 9/095 (2006.01); B23K 9/12 (2006.01); B23K 9/23 (2006.01); B23K 35/38 (2006.01); B23K 103/10 (2006.01); B23K 103/12 (2006.01)
CPC B23K 9/173 (2013.01) [B23K 9/095 (2013.01); B23K 9/125 (2013.01); B23K 9/23 (2013.01); B23K 35/38 (2013.01); B23K 2103/10 (2018.08); B23K 2103/12 (2018.08)] 13 Claims
OG exemplary drawing
 
1. An arc welding control method of a consumable electrode type that alternately performs forward feeding for feeding a welding wire in a direction of a welding object and backward feeding for feeding in an opposite direction to the forward feeding, the arc welding control method comprising:
feeding the welding wire at a wire feeding speed cyclically changed in a predetermined cycle and at a predetermined amplitude to perform welding by repeating an arc period and a short-circuit period;
stopping feeding of the welding wire from a time of an elapse of a first half cycle of a change of the wire feeding speed to an elapse of a first feeding stop period during forward feeding of the welding wire;
feeding the welding wire forward at a first feeding speed from a time of the elapse of the first feeding stop period to an elapse of a first predetermined period; and
feeding the welding wire backward after the elapse of the first predetermined period,
wherein a welding current greater than zero flows through the welding wire during all of the stopping of the feeding of the welding wire from the time of the elapse of the first half cycle of the change of the wire feeding speed to the elapse of the first feeding stop period during forward feeding of the welding wire, the feeding of the welding wire forward at the first feeding speed from the time of the elapse of the first feeding stop period to the elapse of the first predetermined period, and the feeding of the welding wire backward after the elapse of the first predetermined period, and
wherein the first predetermined period is a period from the time of the elapse of the first feeding stop period to detection of a short circuit between the welding object and the welding wire.