公开(公告)号：US20230041907A1

公开(公告)日：2023-02-09

申请号：US17968008

申请日：2022-10-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahiro NOGUCHI ,  Akira NAKAGAWA ,  Junji FUJIWARA

IPC: B23K9/09 ,  B23K9/173 ,  B23K9/10

Abstract: DC arc welding is performed by alternating a short-circuit period and an arc period. The arc period includes first to fourth periods. A welding current is raised to a first current value in the first period, lowered to a second current value with a time slope in the second period, kept at the second current value in the third period, and raised to a third current value then kept at the value in the fourth period. A wire feeding speed is constant throughout the short-circuit period and the arc period. In the second period, a welding output is under constant voltage control. In the third period and the fourth period, the welding output is under constant current control of the welding output.

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.