Method and device for igniting and/or re-igniting a welding arc (SLB) between a wire end of a consumable welding wire electrode (SDE) and a workpiece (W), comprising the steps of: determining (S1) a distance (S) or time duration required by the wire end of the consumable welding wire electrode, SDE, until contact or short-circuit with a surface of the workpiece (W); and igniting (S2) the welding arc (SLB) with an ignition energy, E.sub.Z, which is set in dependence upon the determined distance (S) or time duration.

Method and device for igniting and/or re-igniting a welding arc (SLB) between a wire end of a consumable welding wire electrode (SDE) and a workpiece (W), comprising the steps of: determining (S1) a distance (S) or time duration required by the wire end of the consumable welding wire electrode, SDE, until contact or short-circuit with a surface of the workpiece (W); and igniting (S2) the welding arc (SLB) with an ignition energy, E.sub.Z, which is set in dependence upon the determined distance (S) or time duration.

A system and method of welding or additive manufacturing is provided where at least two welding electrodes are provided to and passed through a two separate orifices on a single contact tip and a welding waveform is provided to the electrodes through the contact tip to weld simultaneously with both electrodes, where a bridge droplet is formed between the electrodes and then transferred to the puddle.

A welding apparatus can comprise an electrode holder configured to removably receive a consumable electrode and an actuator configured to move the electrode holder. The apparatus can comprise a base and an arm having first and second ends, where the first end is coupled to the arm such that the arm extends in a first direction that is angularly disposed relative to the base. The base can be configured to be placed relative to a workpiece such that the second end of the arm is disposed further from the workpiece than is the first end and the electrode, when received by the electrode holder, extends from the electrode holder toward the workpiece. A controller can be configured to adjust a rate at which the actuator moves the electrode holder relative to the arm, optionally based at least in part on an arc voltage measured across the electrode and the workpiece.

A welding device has a central unit and a welding torch unit, which can be connected to the central unit. The central unit includes at least one welding current source for providing electric current needed to operate the welding torch unit and includes a control unit. The welding torch unit includes at least a first welding torch with a first welding wire and a second welding torch with a second welding wire. The control unit is configured to carry out a starting process in such a way that firstly a first arc ignition takes place at one of the two welding torches and after a waiting time since the first arc ignition has passed, a second arc ignition takes place at the other of the two welding torches, which until then was not ignited.

An arc start adjustment device adjusting an arc start procedure in a welding process comprises an obtainment unit that obtains welding data indicating a welding state during or after a welding process, and a procedure adjustment unit that adjusts the arc start procedure such that the cycle time of the welding process is shortened based on welding data obtained by the obtainment unit.

An arc start adjustment device adjusting an arc start procedure in a welding process comprises an obtainment unit that obtains welding data indicating a welding state during or after a welding process, and a procedure adjustment unit that adjusts the arc start procedure such that the cycle time of the welding process is shortened based on welding data obtained by the obtainment unit.

The invention provides a DSC-based full-digital SiC inversion type multi-function argon arc welding power supply, which includes a main circuit and a DSC control circuit; the main circuit includes a common mode noise suppression module, a power frequency rectification and filter module, a SiC inversion and commutation module, power transformer, a SiC rectification and smoothing module and a non-contact arc ignition module connected in sequence and are respectively connected to external arc load; the DSC control circuit includes a DSC minimum system, a human-machine interaction module, a fault diagnosis and protection module, a SiC high-frequency drive module connected to SiC inversion and commutation module, and an electrical load signal detection module connected to the arc load. The argon arc welding power supply has a simple structure, high control accuracy, fast response, small size, high efficiency, low energy consumption and excellent process adaptability, which can improve the quality of welding process.

The invention provides a DSC-based full-digital SiC inversion type multi-function argon arc welding power supply, which includes a main circuit and a DSC control circuit; the main circuit includes a common mode noise suppression module, a power frequency rectification and filter module, a SiC inversion and commutation module, power transformer, a SiC rectification and smoothing module and a non-contact arc ignition module connected in sequence and are respectively connected to external arc load; the DSC control circuit includes a DSC minimum system, a human-machine interaction module, a fault diagnosis and protection module, a SiC high-frequency drive module connected to SiC inversion and commutation module, and an electrical load signal detection module connected to the arc load. The argon arc welding power supply has a simple structure, high control accuracy, fast response, small size, high efficiency, low energy consumption and excellent process adaptability, which can improve the quality of welding process.

An ignition device for welding equipment includes a capacitor, a transformer, a high voltage output circuit connected to a secondary winding of the transformer, a discharging switch enabling discharge of the capacitor to a primary winding of the transformer, a charger and an operation control circuit that controls the charger and the discharging switch.