A welding system includes a welding torch. The welding torch includes a sensor configured to detect a motion associated with the welding torch, a temperature associated with the welding torch, or some combination thereof. A display of the welding torch is activated, a determination is made that the welding torch has been involved in a high impact event, live welding using the welding torch is disabled, a software selection is made, or some combination thereof, based on the motion, the temperature, or some combination thereof.

A welding system includes a welding torch. The welding torch includes a sensor configured to detect a motion associated with the welding torch, a temperature associated with the welding torch, or some combination thereof. A display of the welding torch is activated, a determination is made that the welding torch has been involved in a high impact event, live welding using the welding torch is disabled, a software selection is made, or some combination thereof, based on the motion, the temperature, or some combination thereof.

A harmonic welding wire oscillator configured to oscillate a stretch of welding wire within a wire liner. The oscillator may include an actuator configured to oscillate the welding wire at a resonant frequency of the stretch of welding wire. The oscillation causes reciprocation of the welding wire at the tip of the welding torch.

A harmonic welding wire oscillator configured to oscillate a stretch of welding wire within a wire liner. The oscillator may include an actuator configured to oscillate the welding wire at a resonant frequency of the stretch of welding wire. The oscillation causes reciprocation of the welding wire at the tip of the welding torch.

A wire electrical discharge machine includes: a detection unit configured to detect a contact state in which the wire electrode contacts the workpiece, and a contact release state in which the wire electrode that is in the contact state is separated from the workpiece; a vibration unit configured to, if the contact state is detected during the machining of the workpiece, stop relative movement of the wire electrode and vibrate the wire electrode about a stop position at which the relative movement of the wire electrode has been stopped; and a relative movement control unit configured to resume relative movement of the wire electrode if the contact release state is detected until a predetermined time elapses from when the contact state has been detected or until the number of times that the wire electrode is vibrated reaches a predetermined number of times.

A wire electrical discharge machine includes: a detection unit configured to detect a contact state in which the wire electrode contacts the workpiece, and a contact release state in which the wire electrode that is in the contact state is separated from the workpiece; a vibration unit configured to, if the contact state is detected during the machining of the workpiece, stop relative movement of the wire electrode and vibrate the wire electrode about a stop position at which the relative movement of the wire electrode has been stopped; and a relative movement control unit configured to resume relative movement of the wire electrode if the contact release state is detected until a predetermined time elapses from when the contact state has been detected or until the number of times that the wire electrode is vibrated reaches a predetermined number of times.

A device for welding pipe branches and extensions to a main pipe from inside the main pipe. The device includes a frame (30) and a frame cylinder (31), an elongated electrode shaft (3) having a longitudinal central axis, around which the electrode shaft is rotatably arranged, a rotator disc (13) of the electrode shaft (3), through which the electrode shaft is able to slide axially, an electrode holder (4) in the end of the electrode shaft, an electrode (5) fastened to the holder (4), a welding jig (1, 1.2, 1.3; 2.3, 2.4, 2.5) for supporting the main pipe (6.1; 2.2a) in the welding station, a fastening element (8, 8a) of the welding jig, a rotating element (9) of the welding jig, to which the fastening element is fastened and which is rotatably bearing-mounted inside the frame cylinder (31) such that the rotational axis of the welding jig combines with the central axis of the electrode shaft. The welding jig has a support bracket (1.2, 1.3; 2.4, 2.5) for the main pipe (6.1; 2.2a), by which the main pipe is to be supported in the station, in which the centre axes of the main pipe (6.1; 2.2a) and the electrode shaft (3) are combined. The welding jig has, surrounding the electrode shaft (3), an adapter piece (23), to which is connected a shielding gas channel (24), the shielding gas being adapted to be guided through the adapter piece (23), into the main pipe, and through it, also into the pipe branch or extension to be welded, when the main pipe, or the pipe extension (6.3) to be welded to the main pipe, or the shielding gas pipe (2.3) surrounding the main pipe rests against the adapter piece (23). The rotator disc (13) of the electrode shaft is equipped with a locking device (12), with which the electrode shaft (3) is to be immovably locked in relation to the rotator disc (13).

A surface modification process and apparatus for the electro-spark deposition (ESD) on a workpiece may include mounting a workpiece on a rotationally driven mounting. The contact surface of the workpiece is ESD coated. Ultrasonic vibration is applied to the deposition layer during its crystallization phase. The workpiece may be a resistance spot welding electrode. The apparatus may have a vibrating applicator, ESD power supply, integrated ultrasonic transducer assembly, a work station having a rotational drive and an ultrasonic generator. The ultrasonic generator is connected to the ultrasonic transducer. The ultrasonic transducer assembly and the rotating driving work bench unit are integrated in a single assembly. The workpiece seats on the ultrasonic transducer assembly. The deposition of a surface coating occurs during simultaneous application of electro-spark deposition and ultrasonic vibration.

A solid object is rotated in the central pool of molten metal that is formed by using an arc to melt a continuously fed metal wire and depositing the melted wire between the facing edges of two base metals to be joined. The stirring generated by the rotation in the pool moves hotter metal in the central region to its boundary adjacent to the facing edges. This stirring generated movement of molten metal is expected to better heat the facing edges so that the molten metal can better fuse with the facing edges. The stirring generated fluid flow within the molten pool also changes the solidification of the molten metal and the formation of the resultant grains.

A solid object is rotated in the central pool of molten metal that is formed by using an arc to melt a continuously fed metal wire and depositing the melted wire between the facing edges of two base metals to be joined. The stirring generated by the rotation in the pool moves hotter metal in the central region to its boundary adjacent to the facing edges. This stirring generated movement of molten metal is expected to better heat the facing edges so that the molten metal can better fuse with the facing edges. The stirring generated fluid flow within the molten pool also changes the solidification of the molten metal and the formation of the resultant grains.