Granular welding flux delivery devices and strip cladding systems with granular welding flux delivery devices are disclosed. A disclosed example granular welding flux delivery device includes a hopper having: an intake opening to receive granular welding flux; a chute; and an output opening to output the granular welding flux to an electroslag strip cladding process, a submerged arc welding process, or a submerged arc strip cladding process. The example granular welding flux delivery device further includes a chute divider positioned within the chute to reduce an intake rate of granular material through the intake opening by reducing a cross-section of the chute based on a dimension of the chute divider. The disclosed example granular welding flux delivery device includes an adjustable output cover attached to the chute proximate to the output opening to extend or retract a length of the chute by adjusting a location of the output opening along the chute.

An additive manufacturing system includes an electrode head comprising an array of electrodes for depositing material to form a three-dimensional part. The array includes a first plurality of electrodes formed from a first metallic material having a first ductility and a first hardness, and a second plurality of electrodes formed from a second metallic material having a second ductility and a second hardness, wherein the first ductility is greater than the second ductility and the second hardness is greater than the first hardness. A power source provides electrical power for establishing a welding arc for each electrode. A drive roll system drives each electrode. A controller is connected to the power source to control operations of the additive manufacturing system to form an interior portion of the part using the first plurality of electrodes, and control the operations of the additive manufacturing system to form an exterior portion of the part using the second plurality of electrodes, such that ductility of the interior portion of the part is greater than ductility of the exterior portion of the part.

Embodiments of systems and methods of additive manufacturing are disclosed. In one embodiment, a metal deposition device (MDD) is configured to deposit a metal material during an additive manufacturing process. A controller is operatively coupled to the MDD and is configured to command the MDD to deposit the metal material on a base to form a contour of a part. The controller is configured to command the MDD to deposit the metal material on the base to form an infill pattern within a region outlined by the contour. The infill pattern is a wave shape having a wavelength. The controller is configured to command the metal deposition device to fuse the infill pattern to the metal contour at crossover points, where the infill pattern meets the contour, by applying energy at the crossover points and reducing a deposition rate of the metal material at the crossover points to prevent distorting the contour.

An additive manufacturing system includes an electrode head comprising an array of electrodes for depositing material to form a three-dimensional part. The array includes a first plurality of electrodes formed from a first metallic material having a first ductility and a first hardness, and a second plurality of electrodes formed from a second metallic material having a second ductility and a second hardness, wherein the first ductility is greater than the second ductility and the second hardness is greater than the first hardness. A power source provides electrical power for establishing a welding arc for each electrode. A drive roll system drives each electrode. A controller is connected to the power source to control operations of the additive manufacturing system to form an interior portion of the part using the first plurality of electrodes, and control the operations of the additive manufacturing system to form an exterior portion of the part using the second plurality of electrodes, such that ductility of the interior portion of the part is greater than ductility of the exterior portion of the part.

A welding torch includes a contact tip and a wire electrode guide extending distal of the contact tip. The wire electrode guide includes a metallic outer sheath and a plurality of ring-shaped electrical insulators stacked axially within the metallic outer sheath so as to form a central wire electrode receiving bore through the plurality of ring-shaped electrical insulators.

A processing head assembly is disclosed. In some examples, the processing head assembly comprises a fabrication energy source; a wire feedstock surrounded by a shield and one or more filler feedstocks surrounded by one or more nozzles. In some examples, the fabrication energy source includes the wire feedstock surrounded by the shield. A method of depositing material on a substrate using a processing head assembly for use with a fabrication energy source; a wire feedstock surrounded by a shield and one or more filler feedstocks surrounded by one or more nozzles is disclosed. In some examples, the method comprises projecting a fabrication energy beam from the fabrication energy source onto the substrate at a spot, projecting the wire feedstock surrounded by the shield onto the substrate at the spot and projecting the one or more filler feedstocks surrounded by the one or more nozzles onto the substrate close to the spot.

A suction apparatus is provided with: a first path connecting an inlet and a drive opening of an ejector; a second path connecting a suction/ejection opening and an intake opening of the ejector; and a third path connecting the inlet and the suction/ejection opening. When the second path is connected by a path switching unit, a gas or an aerosol is suctioned via the suction/ejection opening by means of the first path and the second path. When the third path is connected by the path switching unit, a compressed gas is ejected via the suction/ejection opening by means of the third path.

A dust removal assembly and a laser welding device are described. The dust removal assembly includes: a base; a nozzle, where the nozzle is disposed on the base, the nozzle includes an accommodating chamber and an air inlet and an air outlet in communication with the accommodating chamber, and the nozzle is constructed to introduce compressed air to the accommodating chamber via the air inlet and exhaust the compressed air via the air outlet; and an ionizing bar, where the ionizing bar is disposed in the accommodating chamber, and the ionizing bar is arranged between the air inlet and the air outlet.

Embodiments of portable and compact welding fume extractor systems are disclosed. One embodiment of a welding fume extractor system includes a rechargeable battery pack, a controller/user interface configured to control operation of the system and allow a user to interact with the system, a filter housing having at least one filter configured to extract welding fume particles from a stream of air forced through the filter housing, and a fan/blower assembly configured to force the stream of air through the filter housing. The rechargeable battery pack is configured to provide electrical power to at least the fan/blower assembly and the controller/user interface. Furthermore, the system is configured to be worn on the back of a human welder.

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.