公开(公告)号：US20220063009A1

公开(公告)日：2022-03-03

申请号：US17505098

申请日：2021-10-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahiro NOGUCHI ,  Masaru KOWA ,  Haruki EGAWA ,  Akira NAKAGAWA ,  Junji FUJIWARA

IPC: B23K9/09 ,  B23K9/10 ,  B23K9/095 ,  B23K9/133 ,  B23K35/38 ,  B23K9/16 ,  B23K9/073

Abstract: Disclosed is an arc welding control method of controlling a welding current in short-circuit arc welding of feeding a welding wire toward a base metal and alternating a short-circuit state and an arc state. The arc welding control method includes: executing, in the short-circuit state, a first increase in the welding current with a first slope, a first decrease in the welding current to a first bottom value after executing the first increase, a second increase in the welding current with a second slope after executing the first decrease, and a second decrease in the welding current to a second bottom value that is smaller than the first bottom value after executing the second increase to shift a state to the arc state.

公开(公告)号：US20190275603A1

公开(公告)日：2019-09-12

申请号：US16426202

申请日：2019-05-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Junji FUJIWARA ,  Atsuhiro KAWAMOTO ,  Masaru KOWA

IPC: B23K9/095 ,  B23K9/173 ,  B23K9/12 ,  B23K9/09 ,  B23K9/10 ,  B23K37/02 ,  B23K9/073 ,  B23K9/067

Abstract: Disclosed is a method for controlling arc welding where an arc is generated between a welding wire as a consumable electrode and an object to be welded. The method includes: keeping a wire feed speed at a predetermined constant speed in a steady-state welding period; and at a time point when welding termination is ordered, either switching the wire feed speed from the predetermined constant speed to a wire feed speed at which the welding wire is fed in alternating forward and backward directions, or decreasing the wire feed speed from the predetermined constant speed with time, and then switching the wire feed speed to the wire feed speed at which the welding wire is fed in alternating forward and backward directions at a time point when a predetermined time period has passed since when welding termination was ordered.

公开(公告)号：US20210031290A1

公开(公告)日：2021-02-04

申请号：US17072648

申请日：2020-10-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Noriyuki MATSUOKA ,  Masaru KOWA ,  Junji FUJIWARA

IPC: B23K9/09 ,  B23K9/095 ,  B23K9/16 ,  B23K9/23 ,  B23K9/173 ,  B23K9/12 ,  B23K9/073 ,  B23K35/38

Abstract: A pulse welding period includes a first peak period for supplying a first peak current to a welding wire, a first base period for supplying a base current smaller than the first peak current to the welding wire, a second peak period for supplying a second peak current to the welding wire after alternately repeating the first peak period and the first base period (n−1) times (n is an integer equal to or larger than 2), and a second base period for supplying the base current to the welding wire. The second peak current is larger than the first peak current, and droplets are transferred from the welding wire during the second peak period or the second base period.