A welding gun assembly having a connection between a diffuser and the inner gun tube which provides increased strength between the diffuser and the gun tube to prevent inadvertent damage to the welding torch and upstream components. The diffuser comprises an engagement portion which engages with, and overlaps, at least a part of a sturdier portion of the inner gun tube. This engagement provides a stronger and more stable connection between the gun tube and the diffuser.

A weld overlay system includes a workpiece jig holding a workpiece in manner that the workpiece center axis direction is parallel to X-axis direction, and rotates the workpiece in circumferential direction, a carriage, welding base supported on the carriage in manner that the welding base is displaceable with respect to the carriage in Y-axis direction and Z-axis direction, at least one pair of rollers and welding torch are supported on the welding base, and like. Pair of rollers include rotary shafts extend in parallel with the X-axis and are spaced apart from each other in Y-axis direction. The rollers are pressed against portion of the workpiece above the workpiece center axis C. The welding torch is supported on the welding base in manner that distances in Y-axis direction from the rotary shafts of the pair of rollers to the tip end of the welding torch are equal to each other.

A control application implements computer vision techniques to cause a positioning robot and a welding robot to perform fabrication operations. The control application causes the positioning robot to place elements of a structure at certain positions based on real-time visual feedback captured by the positioning robot. The control application also causes the welding robot to weld those elements into place based on real-time visual feedback captured by the welding robot. By analyzing the real-time visual feedback captured by both robots, the control application adjusts the positioning and welding operations in real time.

A locator-equipped clamp jig capable of suppressing interference between base sections of segments when clamped by the clamp jig, a stator manufacturing device, and a method for manufacturing a stator. The locator-equipped clamp jig has a locator that is provided to part of a main clamp body on a stator core side and has a plurality of protrusions arranged on an upper surface of an electrical conductor that is adjacent, in the radial direction of the stator core, to an electrical conductor being clamped by the main clamp body, the width of the protrusions in the radial direction of the stator core being at least the width of one of the electrical conductors.

A torch for tungsten inert gas welding is provided, in particular a narrow gap head for tungsten inert gas narrow-gap welding. In a housing made of metal, an electrode unit is retained by an electrode retainer and a cooling device for cooling the electrode unit is present. Liquid cooling medium can be conducted into the electrode retainer and back out of the electrode retainer through the cooling device. The cooling device includes at least one electrically conductive partition within a jacket of the electrode retainer for forming cooling channels, at least the at least one partition being electrically connected to the electrode unit. Furthermore, an outer surface of the electrode retainer is provided with an insulating layer at least in the area of the housing, which housing surrounds the electrode retainer.

Arc welding equipment for joining the objects at high speed and for reducing the strain of the objects after being joined is provided. The nozzle housing an electrode forming arc plasma is formed from a gas supply part and a gas suction part. The gas supply part has gas supply holes supplying gas outward in a radial direction of the arc plasma. The gas suction part suctions the gas supplied form the gas supply part. A pair of the gas supply holes, which are disposed so that the electrode is disposed therebetween, supply the gas of a first pressure to a position away from the electrode by a first distance. A pair of the gas supply holes, which are disposed so that the electrode is disposed therebetween other than the pair of the gas supply holes, supply the gas of a second pressure to a position away from the electrode by a second distance. The second distance is longer than the first distance. The gas of the second pressure is lower than that of the first pressure. Thereby, the arc plasma is compressed in a direction connecting the gas supply holes, and the arc plasma becomes long in a direction connecting the gas supply holes.

A method and apparatus for providing welding type power includes a phase shifted double forward converter having a first and second converter and a controller. The controller includes a pwm module that sets the pwm timing signals. The pwm module includes a phase shift module that has a leading edge adjusted output and a trailing edge adjusted output responsive to the output load. The phase shift module also includes a duty cycle offset module and/or a Dmax module that is responsive to the output load current. The pwm module includes a disabling module responsive to at least one of the output current and output voltage that disables one of the first and second converters.

The present invention enables even a beginner to acquire the technique easily and perform suitable spot welding, and achieves improved workability, improved welding quality, improved productivity, and the like. The present invention includes a torch body 2 for passing a shielding gas, a tungsten electrode rod 5 inserted into the torch body 2 and connected to a cathode, a constricted nozzle 6 for supporting a distal end portion of the tungsten electrode rod 5 concentrically, defining a gas passage 6e between the tungsten electrode rod 5 and the constricted nozzle 6 for flowing a shielding gas G, and discharging the shielding gas G from the constricted nozzle 6 at a higher speed than the shielding gas G discharged from the distal end of the torch body 2, and a cylindrical electrode nozzle 7 having conductivity arranged concentrically with the tungsten electrode rod 5 on the outer circumference of the constricted nozzle 6, connected to the anode via a ground cable 18, and configured to have a tapered shape at a distal end portion, wherein the tapered distal end portion is located further outside than the distal end portion of the tungsten electrode rod 5, gas vent ports 7c and 7d of the shielding gas G are provided on the electrode nozzle 7.

An arc welding apparatus disclosed in this specification includes: first electrode; second electrode; and a first gas supply unit which supplies a first shielding gas from the circumference of a base material-side portion of an arc region formed between the first electrode and a base material connected to the second electrode toward the center of the arc region, and controls the ratio of the pressure outside the arc region to the pressure at the center of the arc region to within the range of 70 to 5000.

An apparatus for making three-dimensional physical objects of a predetermined shape includes a printing header having a least one arc welding torch. The arc welding torch includes an axially extending first nozzle and an axially extending non-consumable electrode, which is disposed substantially coaxially within the first nozzle and having a tip disposed at a distal end thereof and/or outside the first nozzle; means for supplying electricity to the electrode; means for supplying a protecting gas to the first nozzle for shielding the electrode from oxidising conditions; an axially extending through-hole formed through the electrode; an elongated non-electrified guide portion disposed within the through-hole terminating inwardly of the tip; and a consumable material wire that is fed through the guide portion relatively to the electrode so that the material wire is not electrified by the guide portion or by the electrode.