US 12,459,047 B2
Multiple pulse welding process
Rupert Frauenschuh, Pettenbach (AT); Josef Artelsmair, Pettenbach (AT); Dominik Söllinger, Pettenbach (AT); and Michael Muss, Pettenbach (AT)
Assigned to Fronius International GmbH, Pettenbach (AT)
Appl. No. 17/602,336
Filed by Fronius International GmbH, Pettenbach (AT)
PCT Filed Apr. 9, 2020, PCT No. PCT/EP2020/060254
§ 371(c)(1), (2) Date Oct. 15, 2021,
PCT Pub. No. WO2020/208187, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 19168535 (EP), filed on Apr. 10, 2019.
Prior Publication US 2022/0161345 A1, May 26, 2022
Int. Cl. B23K 9/09 (2006.01); B23K 9/095 (2006.01); B23K 9/10 (2006.01)
CPC B23K 9/09 (2013.01) [B23K 9/0953 (2013.01); B23K 9/1012 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for synchronizing at least two pulse welding processes for carrying out a multiple pulse welding process, a pulse welding process comprises periodically, at a pulse frequency, repeating welding cycles having a pulse current phase and a base current phase, said method comprising:
performing each pulse welding process by a welding device, the welding devices being connected to one another by a communication link and synchronization information being transmitted via the communication link from a transmitting welding device to at least one receiving welding device;
using the synchronization information in the at least one receiving welding device to synchronize the pulse welding process performed by the at least one receiving welding device with the pulse welding process performed by the transmitting welding device;
transmitting, using the transmitting welding device, at least one synchronization pulse as synchronization information to the at least one receiving welding device, the at least one synchronization pulse being in a defined temporal relation to the welding cycle of the pulse welding process of the transmitting welding device, and the welding cycle of the pulse welding process of the at least one receiving welding device being synchronized based on the received synchronization pulse;
wherein
either the pulse frequency of the transmitting welding device is transmitted to the at least one receiving welding device as synchronization information; and the pulse frequency to be set by the at least one receiving welding device is determined in the at least one receiving welding device from the received pulse frequency of the transmitting welding device by a known frequency divider;
or the transmitting welding device continuously transmits synchronization pulses together with the pulse frequency of the transmitting welding device to the at least one receiving welding device as synchronization information; and
the at least one receiving welding device determines the pulse frequency of the transmitting welding device from the period of the received synchronization pulses and determines the pulse frequency to be set in the at least one receiving welding device from the determined pulse frequency of the transmitting welding device by a known frequency divider.