Patent ID: 11945058
Assignee: FRONIUS INTERNATIONAL GMBH
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method for synchronizing welding currents of at least two welding current sources prior to performing a simultaneous welding process on at least one workpiece, wherein the method has the following steps:
connecting a first welding current source of the at least two welding current sources and a second welding current source of the at least two welding current sources to a common alternating current network;
selecting a phase conductor of the common alternating current network for the first welding current source for synchronizing the second welding current source and the first current welding source;
outputting a reference signal by means of the first welding current source, wherein the reference signal is generated on a basis of a voltage curve of the selected phase conductor and contains synchronization information;
measuring or receiving the reference signal and evaluating the synchronization information contained in the reference signal by means of the second welding current source;
synchronizing a second welding current of the second welding current source with a first welding current of the first welding current source on the basis of the synchronization information; and
identifying the selected phase conductor from the synchronization information by means of the second welding current source.