Induction welding device for variable diameter pipes comprising three inductors configured in the shape of a cam, placed in symmetry in relation to the axial axis of the pipe to be welded, an oscillator connected to each inductor, a mechanical system connected to each inductor, designed to force each inductor to make contact with the pipe by the corresponding degree in relation to the diameter of the pipe at each position, so that the position of the inductors in relation to the pipe changes radially as the diameter of the section of the pipe to be welded also changes.

Induction welding device for variable diameter pipes comprising three inductors configured in the shape of a cam, placed in symmetry in relation to the axial axis of the pipe to be welded, an oscillator connected to each inductor, a mechanical system connected to each inductor, designed to force each inductor to make contact with the pipe by the corresponding degree in relation to the diameter of the pipe at each position, so that the position of the inductors in relation to the pipe changes radially as the diameter of the section of the pipe to be welded also changes.

A waterwall panel welding apparatus is provided. The apparatus includes an inlet assembly, a welding assembly, an outlet assembly, and a heating system. The inlet assembly is for receiving a plurality of tubes. The welding assembly is for receiving the tubes from the inlet assembly and for allowing the tubes to be welded together to form a waterwall panel. The outlet assembly is for receiving the waterwall panel from the welding assembly. The heating system heats the tubes and operates via magnetic induction.

A waterwall panel welding apparatus is provided. The apparatus includes an inlet assembly, a welding assembly, an outlet assembly, and a heating system. The inlet assembly is for receiving a plurality of tubes. The welding assembly is for receiving the tubes from the inlet assembly and for allowing the tubes to be welded together to form a waterwall panel. The outlet assembly is for receiving the waterwall panel from the welding assembly. The heating system heats the tubes and operates via magnetic induction.

Electric induction heating of the edges of a slab comprising an electrically conductive, non-ferrous material is achieved with a transverse flux induction coil that comprises a pair of coil sections with the slab passing between the coil sections. The coil sections extend transversely beyond the opposing edges of the slab. Magnetic flux concentrators are positioned around regions of the coil sections that are above and below the slab. An electrically conductive compensator is inserted between each of the two opposing extended ends of the coils sections in the vicinity of an edge of the slab. Alternatively only one of the edges of the slab may be inductively heated.

Electric induction heating of the edges of a slab comprising an electrically conductive, non-ferrous material is achieved with a transverse flux induction coil that comprises a pair of coil sections with the slab passing between the coil sections. The coil sections extend transversely beyond the opposing edges of the slab. Magnetic flux concentrators are positioned around regions of the coil sections that are above and below the slab. An electrically conductive compensator is inserted between each of the two opposing extended ends of the coils sections in the vicinity of an edge of the slab. Alternatively only one of the edges of the slab may be inductively heated.

An apparatus and a process for removing a support structure from a 3D printed part, where the 3D printed part along with the support structure is placed in an acid solution and the part is surrounded by an induction heater. The acid solution is recirculated through the acid tank to prevent the acid solution from heating up too much. Small surfaces of the part are heated up by the induction heater before larger pieces are heated so that the acid will remove the smaller pieces first. After enough time, all of the support structure is removed by the acid and the heater to leave the finished 3D printed part with the support structure removed.

A system and method for repairing a blade are provided. The system includes an induction heating coil configured for heating a platform and slash face of the blade. The induction heating coil extends under the platform and is adjacent to the slash face to provide substantially uniform localized heating to both the platform and slash face of the blade. The induction heating coil is configured so that the platform is visible during a repair or welding operation.

A system and method for repairing a blade are provided. The system includes an induction heating coil configured for heating a platform and slash face of the blade. The induction heating coil extends under the platform and is adjacent to the slash face to provide substantially uniform localized heating to both the platform and slash face of the blade. The induction heating coil is configured so that the platform is visible during a repair or welding operation.

A system for the production of a polycrystalline silicon product is disclosed. The system includes a reaction chamber, a susceptor, an induction unit, and a plurality of energy sources. The reaction chamber has a reactor wall, and the susceptor encircles the reactor wall. The induction heater surrounds the susceptor, and has multiple induction coils for producing heat in the susceptor. The coils are grouped into a plurality of zones. The plurality of energy sources supply electric current to the coils. Each energy source is connected with the coils of at least one zone.