In a method for scanning the surface of metallic workpieces, during scanning, a welding torch with a consumable welding wire is moved over and towards the workpiece surface, until contact of the welding wire with the workpiece is detected, and the welding wire is subsequently moved away from the workpiece. Before scanning, slag-removal is carried out to remove slag at the welding wire end, wherein the welding current is lowered to a minimum, and the welding wire is moved cyclically with a rapid recurrent forward/backward movement over a specified path length toward the workpiece, and by a smaller distance away from the workpiece, until a short circuit between the welding wire and the workpiece is detected, whereupon slag-removal is ended, and upon the detection of no short circuit, slag-removal is repeated, and upon the detection of several short circuits one after the other, slag-removal is ended.

A method of operating a welding power supply during a welding process in which an electric arc between a consumable electrode and a work piece is generated while feeding the consumable electrode and moving the arc in relation to the work piece along a welding track, wherein a transition between a DC power output of the welding power supply and an AC power output of the welding power supply, or vice versa, is made without interruption of the welding process.

A method and apparatus for monitoring weld cell and related activity is disclosed. The activity is sensed using a variety of sensors, and reported to the controller, or to a remote location.

Automatic darkening filters are often provided on a protective headgear, where protection from high intensity light is desired. An automatic darkening filter includes a switchable shutter, a shutter control system, a light sensor, and an imaging acquisition device. The switchable shutter is capable of assuming at least a dark state, a light state and an intermediate state.

In an offline teaching device in the related art, in the case of changing a teaching program, even in the case of performing the same change at each teaching point, it is necessary to perform the change with respect to each teaching point. The offline teaching device of the present disclosure has a selection function, a first change function, a second change function, a welding line storage function, and a teaching program storage function. The selection function causes one welding line among a plurality of welding lines stored in the welding line storage function to be selected. The first change function causes content of a welding conditions configuring the welding line selected with the selection function to be changed. The second change function causes the welding conditions of entire instructions in the teaching program having the same welding line identification information as welding line identification information that is assigned to the welding line selected with the selection function to be changed to the same content as content changed with the first change function.

Specific AC welding waveforms are utilized to increase the toughness level of austenitic stainless steel above what is achieved using the same welding consumables using standard DC welding waveforms.

Specific AC welding waveforms are utilized to increase the toughness level of austenitic stainless steel above what is achieved using the same welding consumables using standard DC welding waveforms.

A method of hardfacing a metal component includes welding a surface area of the metal component using a Cold Metal Transfer (CMT) process. The method of hardfacing the metal component includes performing the CMT welding process in a weaving pattern over the surface area of the component. A consumable, low carbon steel wire electrode is used in the CMT process.

A method of hardfacing a metal component includes welding a surface area of the metal component using a Cold Metal Transfer (CMT) process. The method of hardfacing the metal component includes performing the CMT welding process in a weaving pattern over the surface area of the component. A consumable, low carbon steel wire electrode is used in the CMT process.

A spot welding apparatus includes a stationary frame having a housing formed therein. An upper welding gun is mounted to a length direction of a pressing unit disposed in the housing of the stationary frame. A plurality of lower welding guns are mounted on an outside of the stationary frame and ends of the plurality of lower welding guns selectively face one end of the upper welding gun in a length direction of the lower welding guns by the plurality of lower welding guns. A plurality of actuators are mounted on the outside of the stationary frame. A plurality of link units are disposed between the actuators and the lower welding guns, connect the actuators and the lower welding guns, respectively, and rotate as the actuators are operated.