公开(公告)号：US20180207739A1

公开(公告)日：2018-07-26

申请号：US15743433

申请日：2016-08-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： ATSUHIRO KAWAMOTO ,  KAITO MATSUI ,  MASARU KOWA ,  TAKAHIRO NOGUCHI ,  MASASHI FUJIWARA

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

Abstract: A base material is welded by a first welding method in a case where a welding parameter related to heat input to the base material is less than a first threshold value. The base material is welded by a second welding method in a case where the welding parameter is less than a second threshold value and is more than the first threshold value. The base material is welded by a third welding method in a case where the welding parameter is more than the second threshold value. By adjusting welding conditions regardless of the thickness of the base material, a welding method suitable for the thickness of the base material is determined to provide a welding with little spatter and no meltdown of the base material.

公开(公告)号：US20220266372A1

公开(公告)日：2022-08-25

申请号：US17683296

申请日：2022-02-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAKAHIRO NOGUCHI ,  AKIRA NAKAGAWA ,  JUNJI FUJIWARA

IPC: B23K9/073 ,  B23K9/095 ,  B23K35/38

Abstract: Provided is an arc welding control method for performing control in an arc period, the control including: first control of increasing welding current (Ia) to first current value (I1) in a range from 200 A to 300 A inclusive at first gradient (S1) and maintaining welding current (Ia) at first current value (I1) for first period (T1); second control of reducing welding current (Ia) from first current value (I1) to second current value (I2) at second gradient (S2) and maintaining welding current (Ia) at second current value (I2) for second period (T2); third control of increasing welding current (Ia) from second current value (I2) to third current value (I3) higher than first current value (I1) at third gradient (S3); and fourth control that is started to reduce welding current (Ia) from third current value (I3) within 0.5 ms after welding current (Ia) reaches third current value (I3) under the third control.

公开(公告)号：US20170232542A1

公开(公告)日：2017-08-17

申请号：US15518496

申请日：2015-11-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KAITO MATSUI ,  ATSUHIRO KAWAMOTO ,  TAKAHIRO NOGUCHI ,  MASARU KOWA

IPC: B23K9/073 ,  B23K9/095

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

Abstract: In control applying a gradient to a command voltage value during an arc period, although stable welding can be performed even in a case where a protrusion length of a welding wire becomes long, when the disturbance such as sudden change in the protrusion length is generated, a current waveform of the arc period is undershot, the short circuit period is disturbed, and it took time to return to the stable state, and the amount of sputter generation is also increased. Therefore, it is possible to suppress a change in current such as undershoot or the like when the disturbance is generated, stabilize short circuit cycle, perform welding with a strong resistance to disturbance and a small amount of sputter generation by changing an inductance value a plurality of times during the arc period.