A plasma arc torch comprises an electrode, a tip, and a shape memory alloy (SMA) starter. The electrode and the tip that are aligned concentrically with a gap therebetween. The electrode is adapted for electrical connection to a cathodic side of a power supply and the tip is adapted for electrical connection to an anodic side of the power supply during piloting. The SMA starter comprises a SMA starter element disposed between the electrode and the tip and is configured deform when heated. A deformation of the SMA starter element draws a pilot arc that extends at least partially through the gap between the electrode and the tip.

A plasma arc torch comprises an electrode, a tip, and a shape memory alloy (SMA) starter. The electrode and the tip that are aligned concentrically with a gap therebetween. The electrode is adapted for electrical connection to a cathodic side of a power supply and the tip is adapted for electrical connection to an anodic side of the power supply during piloting. The SMA starter comprises a SMA starter element disposed between the electrode and the tip and is configured deform when heated. A deformation of the SMA starter element draws a pilot arc that extends at least partially through the gap between the electrode and the tip.

A method for repairing a pocket of a case for a variable stator assembly may comprise: receiving, via a processor, a plurality of wear depths, each wear depth in the plurality of wear depths corresponding to a wear portion in a stator pocket in a plurality of stator pockets; determining, via the processor, a plurality of thicknesses of a coating to be deposited based on the plurality of wear depths, each thickness of the coating in the plurality of thicknesses corresponding to the wear portion for each stator pocket in the plurality of stator pockets; and commanding, via the processor, a coating spray torch to deposit the coating in the wear portion of each stator pocket in the plurality of stator pockets.

A component of a rotary machine extends to an axial direction and a radial direction vertical thereto, and has an inner channel, extending from a first end of a core of a center of the component and to a second end at a radial limiting surface of the component and which is at least partially closed. A blank includes the core of the component and is limited by an outer surface in the radial direction. The blank is subtractively processed in a first subtractive process step, such that an outer contour is elaborated in the area of the outer surface, which extends in the radial direction, and a part of the channel is manufactured, which radially extends in the blank to the first end. The channel is formed by a build-up process on the blank.

A component of a rotary machine formed from a blank, the component includes a center, a boundary surface, and at least one inner passage extending from the center up to the boundary surface and being at least partly closed. The inner passage is formed by a first subtractive machining in which a part of the passage that at least includes an opening of the passage into the boundary surface as well as a cut-out in the top surface is manufactured by machining production, and subsequently the passage is completed by a build-up production on the blank.

The invention relates to a method of welding of at least two metal-based materials (5, 7), non-weldable directly to each other with resistance welding. At least one spacer (6) is joined by welding on at least one of the two surfaces of a material (5) in every interstice between two surfaces of materials to be welded. The welded spacer (6) is utilized so that resistance welding is focused to the surface of the material (5) with the spacer (6) to melt at least one spacer (6) located on the heat affecting zone in order to achieve a weld between the metal-based materials (5, 7).

The invention relates to a method of welding of at least two metal-based materials (5, 7), non-weldable directly to each other with resistance welding. At least one spacer (6) is joined by welding on at least one of the two surfaces of a material (5) in every interstice between two surfaces of materials to be welded. The welded spacer (6) is utilized so that resistance welding is focused to the surface of the material (5) with the spacer (6) to melt at least one spacer (6) located on the heat affecting zone in order to achieve a weld between the metal-based materials (5, 7).

A device for heating a bed of powder in an additive manufacturing apparatus comprising: a plasma generation device (20), said device being adapted to be positioned and displaced above the bed of powder, at a distance from the bed of powder allowing for the generation of the plasma thereon, an electrical power supply unit (22) for said plasma generation device, and a control unit (9) for controlling the power supply and the displacement of the plasma generation device The plasma generation device (20) comprises a magnetic plasma containment assembly.

A titanium material for hot rolling 1 includes a titanium cast piece 3, and titanium sheets 4 that are welded to faces corresponding to rolling surfaces 3a of the titanium cast piece 3. The titanium cast piece 3 and the titanium sheets 4 have the same kind of chemical composition. The titanium material for hot rolling 1 can maintain good surface properties after hot rolling even if a slabbing process or a finishing process is omitted.

In some aspects, autonomous motion devices configured to operably connect to a plasma torch of a plasma cutting system can include: a body to support a power supply of the plasma cutting system and move relative to a workpiece; a torch holder connected to the body and configured to position a plasma arc torch tip of the plasma torch relative to a region of the workpiece to be processed; a drive system to translate the body supporting the power supply and torch autonomously relative to a surface of the workpiece during a plasma processing operation; and a processor in communication with the drive system and configured to communicate with the power supply, the processor being configured to control the translation of the body relative to the workpiece in accordance with the plasma processing operation.