US 12,440,915 B2
Arc welding method comprising a consumable welding wire
Dominik Soellinger, Pettenbach (AT); Josef Artelsmair, Pettenbach (AT); and Manuel Mayer, Pettenbach (AT)
Assigned to Fronius Intellectual GmbH, Pettenbach (AT)
Appl. No. 17/051,973
Filed by Fronius International GmbH, Pettenbach (AT)
PCT Filed Jul. 26, 2019, PCT No. PCT/EP2019/070143
§ 371(c)(1), (2) Date Oct. 30, 2020,
PCT Pub. No. WO2020/021050, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 18186019 (EP), filed on Jul. 27, 2018.
Prior Publication US 2021/0237191 A1, Aug. 5, 2021
Int. Cl. B23K 9/173 (2006.01); B23K 9/09 (2006.01); B23K 9/12 (2006.01)
CPC B23K 9/173 (2013.01) [B23K 9/092 (2013.01); B23K 9/124 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An arc welding method using a consumable welding wire, wherein in successive welding cycles during a welding process a certain welding current is applied to the welding wire and the welding wire is moved with a certain wire conveying speed towards a workpiece to be processed,
wherein when the welding process is changed to another welding process with an increased mean wire conveying speed during a welding cycle, wherein the mean wire conveying speed is the wire conveying speed averaged over the welding cycle, and/or with an increased mean welding current during a welding cycle, wherein the mean welding current is the welding current averaged over the welding cycle, a lowering phase is initiated during the another welding process, wherein in the lowering phase the welding current is lowered for a specified duration, by the mean welding current in the lowering phase being reduced by 10% to 50% compared to the previous mean welding current during a welding cycle, wherein the lowering phase is performed only once and not repeated during the another welding process after the welding process is changed, and wherein after the specified duration of the lowering phase, the another welding process continues with the increased mean wire conveying speed during the welding cycle and/or with the increased mean welding current during the welding cycle, and
wherein the welding process is a short-circuited welding process and the another welding process is a pulsed welding process.