A multiple welding method and a welding device with at least two electrodes which ensure a welding quality that is as consistent as possible and stable welding processes. A test parameter is applied to one of the at least two welding current circuits before the start or after the end of the multiple welding method and at least one electrical. welding parameter is recorded in at least one other welding current circuit, with an electrically conductive connection between the at least two welding current circuits being detected if the recorded welding parameter is influenced by the test parameter and fulfills a predetermined test criterion. Alternatively, at least one electrical welding parameter is recorded in each welding current circuit during the multiple welding method, with an electrically conductive connection between the at least two welding current circuits being detected if the recorded welding parameters change simultaneously.

A multiple welding method and a welding device with at least two electrodes which ensure a welding quality that is as consistent as possible and stable welding processes. A test parameter is applied to one of the at least two welding current circuits before the start or after the end of the multiple welding method and at least one electrical. welding parameter is recorded in at least one other welding current circuit, with an electrically conductive connection between the at least two welding current circuits being detected if the recorded welding parameter is influenced by the test parameter and fulfills a predetermined test criterion. Alternatively, at least one electrical welding parameter is recorded in each welding current circuit during the multiple welding method, with an electrically conductive connection between the at least two welding current circuits being detected if the recorded welding parameters change simultaneously.

An automated welding system includes a camera for capturing a camera image of a molten pool and an arc generated in a groove by arc welding; an estimation unit for outputting a probability distribution image based on a camera image by using a learned model; an extraction unit for extracting a region having at least a predetermined probability from the probability distribution image; a selection unit for selecting a representative point corresponding to a feature point of an arc and a representative point corresponding to a feature point of a molten pool, in the region having at least the predetermined probability; and a correction unit for correcting a control parameter of a welding robot based on a positional relationship of the representative point corresponding to the feature point of the arc and the representative point corresponding to the feature point of the molten pool.

An example welding-type power supply includes: power conversion circuitry configured to convert input power to welding-type power; a user interface configured to receive two or more inputs associated with corresponding qualitative characteristics of a welding arc created by the welding-type power, wherein the two or more inputs are defined within corresponding ranges of the respective qualitative characteristics; and control circuitry configured to: in response to a change in a first one of the two or more inputs, determine a corresponding change in a second one of the two or more inputs based on a relationship between the first and second ones of the two or more inputs; determine two or more welding-type parameters based on the two or more inputs; and control the power conversion circuitry based on the determined welding-type parameters.

A method includes supplying a welding current to a welding zone, monitoring, during a welding current ramp down period of a given short arc welding process cycle, a voltage across a current braking switch that is in an open state and that causes a decrease in welding current being supplied to a welding zone; and when the voltage across the current braking switch that is in the open state reaches a first predetermined voltage threshold, closing the current braking switch before a completion of the welding current ramp down period of the given short arc welding process cycle.

A system and method generates a short circuit arc welding waveform output, having a pinch phase with a break point and a necking threshold, between a welding electrode and a work piece during a short circuit arc welding process. A necking threshold energy and a break point energy of the short circuit arc welding waveform output are monitored during the short circuit arc welding process, and a running average of the necking threshold energy is generated. An actual pinch energy relationship value is calculated based on the running average of the necking threshold energy and the break point energy, and is compared to a previously specified pinch energy relationship value. The break point energy of the short circuit arc welding waveform output is adjusted in response to the comparison to maintain the actual pinch energy relationship value to be at the specified pinch energy relationship value.

A shielded metal arc welding system includes a stick electrode holder, a stick electrode clamped by the holder, and a welding power supply operatively connected to the holder and configured to supply a welding current to the electrode through the holder. The power supply includes a memory storing both of a short circuit threshold voltage level and an arcing threshold voltage level. A welding voltage level is detected during an initial shorting of the electrode to a workpiece for commencing a welding operation. Both of the short circuit threshold voltage level and the arcing threshold voltage level are adjusted based on the detected welding voltage level. A short circuit clearing routine is activated when the welding voltage level is equal to or less than the adjusted short circuit threshold voltage level, and deactivated when the welding voltage level is equal to or greater than the adjusted arcing threshold voltage level.

A welding current source for providing a welding current and a welding voltage at an output in order to carry out an arc welding process includes an input-side rectifier, an inverter, which is operated with a switching frequency, a transformer having a primary winding and at least two secondary windings, at least two rectifiers arranged between the secondary windings and the output, and at least one capacitor and one load resistor at the output. At least one current-limiting reactor is arranged on the second secondary winding and the load resistor for discharging the capacitor, which can be charged by the current-limiting reactor, the current-limiting reactor, and the capacitor are dimensioned in such a way that the maximum value of the no-load voltage at the output is greater than the voltage corresponding to the transmission ratio of the primary winding to the secondary winding of the transformer.

A welding current source for providing a welding current and a welding voltage at an output in order to carry out an arc welding process includes an input-side rectifier, an inverter, which is operated with a switching frequency, a transformer having a primary winding and at least two secondary windings, at least two rectifiers arranged between the secondary windings and the output, and at least one capacitor and one load resistor at the output. At least one current-limiting reactor is arranged on the second secondary winding and the load resistor for discharging the capacitor, which can be charged by the current-limiting reactor, the current-limiting reactor, and the capacitor are dimensioned in such a way that the maximum value of the no-load voltage at the output is greater than the voltage corresponding to the transmission ratio of the primary winding to the secondary winding of the transformer.

A device and method for welding a welding stud to a base material are provided. A welding current is applied to a welding stud between the welding stud and the base material, wherein a material of the welding stud and the base material is partially liquefied. The welding stud is then immersed into the solidifying material of the welding stud or the base material in order to create a bond between the welding stud and the base material.