An example welding torch includes: a first contact tip configured to conduct welding current to a consumable electrode; a second contact tip configured to conduct preheating current to the consumable electrode; a cooling assembly configured to transfer heat from at least the first contact tip to coolant and to conduct the welding current through the cooling assembly; wherein the first contact tip and the cooling assembly are removable from the welding torch as a single unit.

The present invention discloses that a multi-laser cutting method and system, which is applied to a substrate to form a primary substrate having a pattern of rounded corners and a line, the throughput could be improved because CO.sub.2 laser cannot cut the round corner at the high speed, but the substrate strength could be kept due to the high cutting quality of the lines by CO.sub.2 laser. The poor quality of the cutting edges of the round corners will not affect on the substrate strength but the round corner cutting by the second laser unit will speed up the cutting process. The present invention applies the method by the 2 different laser machines to balance the throughput. Because at the same speed, for example 150 mm/sec, the cycle time per 1 substrate will be different due to the different length of the cutting lines.

The invention relates to gas conducting unit for a gas-cooled plasma cutting torch, wherein the gas-conducting unit is single-part or multi-part tubular or annular. The gas-conducting unit comprises a single-part or multi-part tubular or annular gas-conducting unit body with a longitudinal axis L1. In a wall of the gas-conducting unit body, there are situated at least one opening, which is inclined by an angle δ in a range of ± 15° with respect to the longitudinal axis L1, and at least one second opening, which is inclined radially with respect to the longitudinal axis L1 or which, in a radial plane, is inclined at an angle γ in the range of ± 30°from the radial to the longitudinal axis L1.

Power system radiators and power systems having radiators are disclosed. An example power system includes: an engine; a generator configured to generate electrical power from mechanical power provided by the engine; power conversion circuitry configured to convert the electrical power from the generator to welding-type power; and a housing enclosing the engine, the generator, and the power conversion circuitry; and a radiator assembly configured to cool the engine and comprising a heat exchanger oriented substantially horizontally when the power system is installed.

A continuous hot bonding method for producing a bi-material strip with a strong bond therebetween is provided. The method comprises sanding a first strip formed of steel; and applying a layer of first particles, typically formed of copper, to the sanded first strip. The method next includes heating the first strip and the layer of the first particles, followed by pressing a second strip formed of an aluminum alloy onto the heated layer of the first particles. The aluminum alloy of the second strip includes tin particles, and the heat causes the second particles to liquefy and dissolve into the melted first particles. The first particles and the second particles bond together to form bond enhancing metal particles, which typically comprise bronze.

A bond head for a thermocompression bonder is provided. The bond head includes a tool configured to hold a workpiece to be bonded, a heater configured to heat the workpiece to be bonded, and a chamber proximate the heater. The chamber is configured to receive a cooling fluid for cooling the heater.

The disclosure relates to a beam-forming unit for forming a laser beam and focusing the laser beam onto a workpiece. The unit includes a movable component, an immovable component, and a cooling system configured for movement of a cooling medium to actively cool the movable component. The cooling system has-a cooling water circuit on the immovable component configured for water cooling of both the immovable component and the cooling medium.

An electric arc torch includes a torch base, and a cooling conduit having a conduit wall forming a central axial bore and having a plurality of longitudinal cooling channels spaced circumferentially around the bore. The cooling channels extend through the conduit wall from a first end portion to a second end portion of the conduit. The cooling channels include both a plurality of cooling liquid distribution channels and a plurality of cooling liquid return channels alternately arranged within the conduit wall. The conduit includes a circumferential cooling liquid manifold in fluid communication with each of the cooling liquid distribution channels, a circumferential return manifold in fluid communication with each of the cooling liquid return channels, and a circumferential recirculation manifold in fluid communication with each of the cooling liquid distribution and return channels such that the cooling liquid distribution and return channels are in fluid communication through the circumferential recirculation manifold.

The object of the present invention is to provide a welding apparatus and a plasma welding method capable of obtaining deep penetration while suppressing initial investment in a welding apparatus. The welding apparatus of the present invention includes a torch for plasma welding and a power supply device, wherein the power supply device is composed of a first welding power supply used for a TIG welding apparatus, in which a positive terminal is electrically connected with the insert chip and a negative terminal is electrically connected with the electrode, and a second welding power supply used for a TIG welding apparatus, in which a positive terminal is electrically connected with a material to be welded and a negative terminal is electrically connected with the electrode.

An internal heat exchanger (IHEX) for pipeline welding includes a drive system configured to move the IHEX into a position within at least one pipe section near a weld joint location with another pipe section. The IHEX further includes a cooling section including cooling structure configured to selectively cool one or more interior surface portions of the at least one pipe section, and a controller in communication with the cooling structure and configured to activate the cooling section when the IHEX is at the position within the at least one pipe section.