Abstract: A fixing device includes a fixing nip portion that conveys a recording material. As the recording material is conveyed, the fixing nip portion melts and fixes unfixed toner images on the recording material. The fixing device includes a first rotating element having a roller shape, an induction heating device, and a pressing member. The induction heating device has an exciting coil wound along the outer or inner peripheral surface of the first rotating element that heats the first rotating element by electromagnetic induction. The exciting coil has a clearance which changes in a direction of an axis of rotation of the heating roller to thereby vary the magnetic field intensity in the exciting coil. The pressing member is pressed into contact with the first rotating element, or a second rotating element heated by the first rotating element, and is rotated in the forward direction to form the fixing nip portion.

Abstract: A transverse flux induction heating apparatus adjusts the level of edge heating of a workpiece by changing the pole pitch of induction coils forming the apparatus to provide a more uniform transverse temperature of the workpiece. Changes in the operating frequency of the induction power supply and in the distance between induction coils and workpiece are not required to adjust edge frequency heating. The pole pitch, and therefore, the level of edge heating can be continuously changed, or conveniently adjusted prior to a production run, in a high speed continuous heat treatment process for a workpiece.

Abstract: In transverse flux induction heating of electrically conductive strip, conductors that cross the strip width are stacked, or connected, such that a multiple of the induced current flows across the strip width as compared to that which flows along the strip edges. Conductors across the width of the strip and conductors along the edges of the strip are connected in series to insure that the current which flows in the conductors is everywhere the same. In the case of two stacked cross conductors, this gives an I2R heating of four times the heating across the strip width as compared to that along the strip edges.

Abstract: The method and apparatus are for use in automotive vehicle repair, both mechanical and body. The apparatus includes at least an eddy current/hysteretic circuit and at least one applicator functionally engaged to the circuit for obtaining a desired result when the applicator is placed into contact with structure of the vehicle to be affected by heating thereof.

Abstract: An induction brazing tool includes a pair of induction coil components each having a linear extension and a semi-circular coil at one end. A distal end of each component remote from the semi-circular coil includes a flange for connecting the tool to an induction brazer. The components are formed of electrical conductive hollow copper tubing. The opposite end of each component includes a flange for bolting the components to one another. Nipples are provided the ends of the coil portions and a flexible hose interconnects the nipples. A braid of electrical conductive material also connects the nipples. In use, the components are opened to form a clamshell configuration, disposed about parts to be brazed and bolted together and to the brazer. By flowing electrical current and cooling water along the tool, a brazed joint is effected.

Abstract: In a process for the induction hardening of crankshafts with at least one connecting-rod pin and with at least two main bearings, in particular for the hardening of the at least one connecting-rod pin, by means of a contactlessly operating inductor, the crankshaft performs a rotational movement during the hardening of the at least one connecting-rod pin. The center axis of the at least one connecting-rod pin to be hardened is used as the axis for the rotational movement of the crankshaft.

Abstract: The invention is a plasma-generating device useful in a wide variety of industrial processes. The plasma is formed in a chamber having a toroidal topology, and is heated inductively. As with all inductive plasmas, a primary coil carries an applied AC current, which, in turn, generates a corresponding applied AC magnetic flux inside the plasma. This flux induces current to flow through the plasma in closed paths that encircle the flux, thereby heating and maintaining the plasma. In this invention, the applied AC current flows through the primary coil around substantially the short poloidal direction on the torus. Accordingly, the applied magnetic flux is caused to circulate through the plasma along the larger toroidal direction. Finally, the current induced within the plasma will flow in the poloidal direction, anti-parallel to the applied primary current.

Abstract: An energy storage system for use in a magnetic pulse welding and forming apparatus includes a bank of capacitors and a very-low inductance conductive bus system interconnecting the capacitors. The bus system provides the ability to generate a very high frequency, short duration impulse which is needed for welding. The energy storage system further includes an energy source connected to the capacitors, a discharge device, a charging control device, and a discharge control device for selectively initiating discharge of energy stored in the capacitors. Inductor tools used in connection with the energy storage system are split to allow parts to be welded to be easily mounted into and removed from the inductor tools. One part of the split inductor tool is either rotatable or slidably movable relative to a fixed part of the inductor.

Abstract: An apparatus and method for generating heat, in particular for heating a fluid. The apparatus includes a frame, with at least one permanent magnet fixedly mounted to the frame. An electrically conductive member is disposed proximate the permanent magnets. The magnetic field of the magnets upon the conductive member is made to vary cyclically. Typically either the permanent magnets, the conductive member, or both are movable with respect to one another. Relative motion of the conductive member and the magnets causes the magnetic field experienced by the conductive member to vary, which causes it to become hot. The total heat energy generated in the conductive member may exceed the total energy applied to the apparatus to produce the varying magnetic field. The apparatus may include a fluid path proximate the conductive member. Fluid in the fluid path receives heat from the conductive member.

Abstract: A magnetic heating device comprising three electrical coils, each coil being wound around a respective magnetic yoke having a gap therein, the three yokes being arranged such that the gaps are adjacent to each other or coincident, an article to be heated being located, in use, in the gaps in the three yokes, so as to direct the magnrtic field generated in each yoke by its respective coil through the articles, each coil being connected to a respective different phase of a three phase low frequency alternating electrical supply, and one of the coils being wound in the opposite direction to the other two coil.

Abstract: A fixing device using induction heating includes an endless member having a metal layer of a conductive material; and an electromagnetic induction coil arranged close to said endless member, alternating current being supplied to said coil, thereby generating heat to heat up said endless member, said coil being wound onto a core member arranged in a width direction of said endless member, and an expansion of a folded portion of said coil being absorbed by a narrower portion of said core member, thereby maintaining to be constant the width of a gap between said coil and said endless member.

Abstract: An apparatus for heating liquids, such as cooking fat, includes a vessel for the liquid to be heated, an electrically inductive impeller disposed in the vessel, a motor for rotating the impeller, to cause the liquid to circulate around the vessel, and a electrical coil on the opposite side of a wall of the vessel to the impeller. A high frequency signal is applied to the coil, which generates a magnetic field that induces eddy currents in impeller. The impeller is not an ideal conductor and, therefore, the electrical energy is dissipated as heat, as current, flows through the impeller. The heat generated in the impeller is transferred to the liquid as it circulated around the vessel by the impeller.

Abstract: An induction heater (14) for use in conjunction with an associated furnace (10) for material processing includes essentially straight induction coil (16, 50) arranged inside the furnace shell (12). The induction coil (16, 50) has an attachment end (32, 54) extending outside of the furnace shell through a first opening (40) therein. A replacement induction coil (54R) is selectively connected with the attachment end (32, 54) of the induction coil (16, 50) and slidably inserted into the furnace shell (12) whereby the essentially straight induction coil (16, 50) is simultaneously slidably pushed out of the furnace shell (12) through a second opening therein.

Abstract: A method for transverse flux induction heating using a heating machine including an iron core, that essentially has a U-shape with an opening facing downwards. The legs lie in contact with downwards facing displaceable core jaws. These are so arranged that they are displaceable towards and from each other by means of pneumatic pistons. The object that is to be heated is placed between the core jaws. The core jaws are at the displacement guided by means of U-shaped rails and rolls or linear bearings. The displacement serves among other things to free the object that is to be heated or has been heated for transport into and out from the machine. When the right position has been reached the displacement is stopped and the two core jaws are locked by a pressurized bellow pressing the core jaws upwards against the legs of the U-shaped core.

Abstract: An induction heating furnace includes a furnace body having a side wall extending so obliquely as to increase in radius from the bottom to the top edge portion and formed by a plurality of longitudinally split, conductive segments arrayed circumferentially and insulated from each other, a first induction heating coil arranged at an outer periphery of the side wall for subjecting a to-be-heated material accommodated in the furnace body to induction heating and a melt-use power source for supplying AC power to the first induction heating coil.

Abstract: By freely adjusting the heat generation distribution of an object to be heated, the heat generation distribution which matches a purpose can be easily obtained. In an electromagnetic induction heating device including an object to be heated having at least an electromagnetic induction heat generating layer and a magnetic field generating unit which is arranged toward the electromagnetic induction heat generating layer of the object to be heated in an opposed manner and includes an exciting coil which generates a magnetic flux penetrating the electromagnetic induction generating layer, a magnetic flux adjusting member which is made to be interlinked with a portion of the magnetic flux of the exciting coil to generate an electromagnetic induction action so that the magnetic flux acting on the electromagnetic induction heat generating layer is changed is disposed in the vicinity of the exciting coil.

Abstract: A fluid heating system in which the electromagnetic field on both sides of a single induction work coil is utilized to heat two separate but connected chambers simultaneously.

Abstract: A fixing device is provided, the fixing device using induction heating for causing alternating current to pass through an electromagnetic induction coil, provided inside a heating roller made of a metal, to cause the heating roller to generate heat to heat a member to be fixed, wherein the center of the coil in the axial and longitudinal direction is coincident with the center of a thermal load of the heating roller as a member to be heated.

Abstract: An induction heating device for heating a rolling roller by induction heating so as to equalize the diameter of the rolling roller, comprises: an induction heater; an induction heater moving means for moving the induction heater to a heating portion while a distance from the induction heater to the surface of a portion to be heated is kept constant; an electric power supply means for supplying electric power to the induction heater; and a heat quantity adjusting means for adjusting the quantity of heat of the induction heater according to the quantity of heat required by the heating portion.

Abstract: In an induction heating coil unit for a manifold in a hot runner mold, it is possible to uniformly heat a material over the entire length of a runner. Also, a coil is easily attached to and detached from the manifold. The hot runner mold includes a fixed mold and a movable mold, and a space is provided along a side surface of the manifold on which clamping force applied by the fixed mold and the movable mold does not act. A coil is wound to the side surface along an axial line of a runner of the manifold within the space such that the manifold is induction-heated from the side surface.

Abstract: A coil/capacitor combination useable as an induction furnace includes a reactive capacitor bank directly bolted to the coil and protected from coil fields by shields and heat sink plates. The coil includes a selectively openable switch for placing the coil assembly on and off of a moving strip. The switch is operated by deflecting coil turns within the natural resiliency of the turns themselves.

Abstract: An induction heating apparatus used as a fixing apparatus of a copying machine, a printer, and the like includes a first coil for generating a magnetic field to induce an eddy current in a heating member, a second coil for cancelling the magnetic field generated by the first coil, and a third coil connected to the second coil and wound in a direction opposite from the winding direction of the second coil. The induction heating apparatus permits an efficient use of power.

Abstract: An induction heating coil assembly including modular cast refractory blocks (10, 12, 14, 16) encasing copper turns (24, 26). The blocks are configured so that the segmenting between blocks occurs at locations where refractory cracks have been prone to occur. The turns, and additional support rods (42, 44), are placed in tension and fastened against the end walls of the refractory blocks to place the blocks under compression to the extent that normal gravitational forces tending to place the refractory blocks in tension are overcome by the compressive forces of the turns and rods.

Abstract: An first induction hardening coil assembly according to one embodiment of the present invention comprises a coil having a top surface, an underside surface, and an inner coil curvature disposed between the top surface and the underside surface. The inner coil curvature extends approximately 180 degrees around a coil axis. The coil further includes a first end section adjacent a first end of the inner coil curvature which extends between the top surface and the underside surface. A second end section adjacent a second end of the inner coil curvature extends between the top surface and the underside surface. A support arm is connected to the coil and is constructed and arranged for providing an electrical connection between the coil and a source of electrical current. The support arm includes a current-in portion connected to the underside surface adjacent the first end section and a current-out portion connected to the top surface at a location which is between the first and second end sections.

Abstract: An induction heating furnace includes a furnace body having a side wall extending so obliquely as to increase in radius from the bottom to the top edge portion and formed by a plurality of longitudinally split, conductive segments arrayed circumferentially and insulated from each other, a first induction heating coil arranged at an outer periphery of the side wall for subjecting a to-be-heated material accommodated in the furnace body to induction heating and a melt-use power source for supplying AC power to the first induction heating coil.

Abstract: A method and apparatus for induction heating includes a power supply, and a controller, and an induction head. The induction head includes a flexible coiled, such as one formed with Litz wire. The head also includes a thermal insulator, for disposing between the head and the workpiece. The insulator reflects heat back to the workpiece, protecting the coil, but is transparent to inductive (E-M) energy. The power supply is a variable output frequency power supply, such as one having a resonant tank, to adapt to the inductance of the head.

Abstract: An induction heating apparatus used as a fixing apparatus of a copying machine, a printer, and the like includes a first coil for generating a magnetic field to induce an eddy current in a heating member, a second coil for cancelling the magnetic field generated by the first coil, and a third coil connected to the second coil and wound in a direction opposite from the winding direction of the second coil. The induction heating apparatus permits an efficient use of power.

Abstract: Twelve induction coils axially arrayed on a roller are arranged into: a first group of induction coils delta connected induction coils excited by a three-phase voltage; a second group of star-connected induction coils being successively disposed while being spaced apart in the phase rotation direction of the first group of induction coils; a third group of delta-connected induction coils being excited by a phase-shifted voltage formed by phase-shifting a three-phase voltage by 180° and being successively disposed while being spaced apart in the phase rotation direction of the second group of induction coils; and a fourth group of star-connected induction coils being excited by a phase-shifted voltage and being successively disposed while being spaced apart in the phase rotation direction of the third group of induction coils.

Abstract: A fixing device includes a heat roller which is adapted to be moved at the same velocity as the transferring speed of a paper with an image thereon and is adapted to be contacted with the paper to thereby enable the image on the paper to be thermally fixed, and an induction heating mechanism for performing an induction heating of the heat roller. The induction heating mechanism includes a coil, and a supporter for supporting the coil, and the supporter has a frame structure which is partitioned into a plurality of sections which are partitioned in a direction perpendicular to the transferring direction of the paper.

Abstract: A static coil induction welding apparatus and method for induction welding thermoplastic composite structures. The apparatus includes a plurality of independent coil segments disposed adjacent one another in side-by-side fashion to form a coil pack. A plurality of such coil packs are disposed in side-by-side fashion to form a coil assembly which covers the entire area of the weld zone. An AC power supply associated with each coil pack applies an AC signal through a switching network to electrically energize its associated coil segments such that the AC signals are in predetermined phase relationships relative to one another, thus generating a plurality of eddy current loops in a susceptor placed between the components being welded. The switching network alternately switches the coil segments such that the AC signals applied to the coil segments are shifted back and forth between adjacently disposed coil segments repeatedly approximately every 0.5 seconds.

Abstract: The present invention has an object to provide an induction-heating fusion device which is capable of stabilizing the fusing temperature over the entire width of a sheet therethrough by inhibiting an excessive temperature rise in a sheet-nonpassing zone defined when a small-size sheet is subjected to fusion. The induction-heating fusion device according to the present invention includes an iron core 17 forming a closed magnetic circuit, a main induction coil 14a wound around the iron core 17 for generating a magnetic flux which causes an electrically conductive member to generate an induction current circumferentially thereof, and at least one induction sub-coil 14b provided on an end portion of the main coil for generating a magnetic flux which causes the electrically conductive member to generate an induction current circumferentially thereof.

Abstract: The present invention provides an induction heating method for a manifold in a hot runner mold where it is possible to uniformly heat material over the entire length of a runner and in which a coil may be easily attached to and detached from the manifold.

Abstract: There are provided an induction heating coil for carrying out high frequency induction heating (heating during movement) of a hot rolled steel or the like by surrounding the hot rolled steel or the like which is placed on a plurality of conveying rollers and conveyed, and an induction heating apparatus using this induction heating coil. In an induction heating coil 2 for induction heating a heated body (a thin slab 8 or the like) by surrounding it, a first coil portion 13 wound in a spiral form while transferring in one direction (the direction of the arrow mark &agr;) along a coil axis S and a second coil portion 14 which is connected to a terminal (turn point 18) of the first coil portion 13 and wound back while transferring in the other direction (the direction of the arrow mark &bgr;) along the coil axis S are combined so as to overlap in the non-contact state.

Abstract: A heating apparatus includes a heating element having a conductor, at least a part of which is an electrically closed circuit along which an eddy current flows; a container for accommodating the heating element; a magnetic field induction section for induction-heating the heating element; and a high frequency power supply device for supplying high frequency power to the magnetic field induction section. The heating element is induction-heated by an AC magnetic field generated by the magnetic field induction section.

Abstract: An electrophotography fixing device has a heating roller and an induction heating device. In order to improve heat resistance, heat radiating performance and insulation performance and in order to appropriately uniformly heat the heating roller, in the induction heating device, induction heating coils wound onto a core are fixed by varnish mixed with mica, and the outside surfaces thereof are fixed by a heat resistant bundling band or a molded body of a heat resistant material, or coated with a heat resistant, insulating and thermal conductive sheet. Alternatively, the same sheets as the above described sheet are provided between the core and the coils and between the layers of the coils. In addition, the core is formed with a hole extending in axial directions or holes extending in directions perpendicular to the axial directions. Moreover, the coils are doubly insulated.

Abstract: An induction heating apparatus and method for heating a substantially continuous first bondline defined by a length of thermally responsive bonding material positioned between a first member and a second member. The first member or second member is made of an electrically conductive material or positioned adjacent an electrically conductive material. The inductive heating apparatus includes a flexible, reshapeable cable assembly operably positionable adjacent the first member along the first bondline. The flexible, reshapeable cable assembly is capable of being manually shaped to a first shape of the first bondline, and is capable of being manually re-shaped to a second shape of a second bondline different than the first shape of the first bondline. An alternating current power supply is electrically coupled to the flexible, reshapeable cable assembly.

Abstract: A heating apparatus includes a heating element having a conductor, at least a part of which is an electrically closed circuit along which an eddy current flows; a container for accommodating the heating element; a magnetic field induction section for induction-heating the heating element; and a high frequency power supply device for supplying high frequency power to the magnetic field induction section. The heating element is induction-heated by an AC magnetic field generated by the magnetic field induction section.

Abstract: C-shaped inductors for induction heating a heated steel material that is carried via table rollers. Each C-shaped inductor includes a C-shaped iron core having a pair of legs facing each other by sandwiching a gap through which the heated steel material passes, and heating coils wound around the pair of legs of the C-shaped iron core. A ring-shaped iron core for restricting induced currents generated in the heated steel material is disposed near the C-shaped inductors, and the heated steel material passes through the gap of each C-shaped inductor.

Abstract: The tool comprises one or more core-coil assemblies 2 jacketed in an non-magnetic and electrically insulating, tubular outer housing, 10. The housing enables high power transfer efficiency. A structural skeleton 20 extends longitudinally through the tool for axially reinforcement. The core-coil assemblies 2 are encapsulated in epoxy 77 to mechanically rigidify and protect them as well as to isolate the coil windings 51 from the power bus 23 extending longitudinally of the core-coil assemblies through a peripheral busway 60, 61.

Abstract: A transverse flux heating coil is disclosed to inductively heat a continuous run of wire. In general, the transverse flux heating coil includes a single loop conductive element having a pair of termination ends extending therefrom and connectable to a power supply. The single loop conductive element is constructed to distribute the majority of the current across a width of the single loop conductive element and forms an internal heating area in which a continuous run of wire is fed therethrough. The flux generated by the current is generally transverse to a direction of travel of the wire through the heating coil. The transverse flux heating coil includes a first conductor having a width facing an internal heating area that is substantially greater than a thickness and is constructed of planar copper bar stock.

Abstract: A fixing device for an electrophotography system, which is capable of efficiently and uniformly heating an object to be heated, which has a coil capable of being easily produced and which is capable of being stably fixing a fixed material, is provided by preventing the distance between the going and returning portions of a certain turn of the coil from being too close to each other, by preventing the diameter of the coil from changing when the coil is wound, by providing a uniform gap between the coil and the inside surface of the heating roller over the whole length, by preventing the fixing performed by the heating roller to be affected by the turning ON/OFF of a power supply, by preventing noises from being generated from the coil ejecting portion, and by devising the procedure for efficiently winding the coil.

Abstract: A method and apparatus for induction heating includes a power supply, and a controller, and an induction head. The induction head includes a flexible coiled, such as one formed with Litz wire. The head also includes a thermal insulator, for disposing between the head and the workpiece. The insulator reflects heat back to the workpiece, protecting the coil, but is transparent to inductive (E-M) energy. The power supply is a variable output frequency power supply, such as one having a resonant tank, to adapt to the inductance of the head.

Abstract: An induction heater having an induction coil (26) for heating a metallic substance (4) hidden by a membrane (2), the metallic substance being coated with a heat activated adhesive on its side adjacent the membrane (2). The heater having four location sensor coils (36) for detecting the position of the hidden metallic substance and means to facilitate the placement of the induction coil (26) over the hidden metallic substance (4), based on information from the sensors. Once the induction coil (26) is over the metallic substance (4) it is used to heat the adhesive thereby adhering the metallic substance (4) to the membrane (2). The sensors (36) are adjacent the inductor coil (26) and are insulated therefrom by an air gap (38).

Abstract: A process for heat treating steel wires in which the wires are passed through an induction furnace with induction coils connected in series to a common power supply. No more than one wire passes through any one of the induction coils. The wires are heated to their Curie temperature, where the wires become non-magnetic. This makes the process substantially self-regulating. If one or more wires are heated more rapidly than others, little if any heating of the more rapidly heated wires will occur after they reach their Curie temperature, and all wires will leave the inductive heating furnace at or near their Curie temperature. The system will operate satisfactorily with one or more wires missing. When this happens, for loading purposes or other reasons, the efficiency of the unit degrades but sufficient excess power remains such that heating of the wires that are passing through the system will be relatively unaffected at the design mass flow rate.

Abstract: A new apparatus and process for soldering surface-mount and through-hole type electronic components into a printed circuit board (PCB) in an automated fashion utilizing localized electromagnetic induction heating. Current manufacture technology for packaging electronic components depends exclusively on the reflow and wave soldering processes. Both processes heat up to relatively high temperature the entire assembly, namely its PCB and all the electronic components been soldered into it. Such high temperature environment frequently causes components damage resulting in rejects and/or demanding rework. With this invention however, during a soldering operation only the leads and pads, or joints, being soldered are heated but neither the body, or casing, of said electronic components nor the dielectric material forming said PCB are heated. Because of this selectively localized heating, the invention permits to reduce cost and improve the quality and reliability of manufactured products.

Abstract: Induction heating apparatus for use in welding an end of a first length of pipe (26) to the exterior surface of a second length of pipe (28), consists of heating assemblies (20, 24) each comprising at least one electrical induction coil (32, 36) wound on an annular, laminated, magnetic core assembly (30, 34). The lowermost surfaces of said core assembly (30, 34) define a saddle shape adapted to be seated on the exterior surface of said second length of pipe (28). The arrangement of the coils (32, 36) and the core assemblies (30, 34) is such that substantially all of the magnetic flux generated when the apparatus is seated on the pipe (28) and the coil is energised is contained within the core assembly and within the wall of the pipe (28). Advantageously, the core assemblies (30, 34) have E-sections profiles, the ends of the limbs of the E-sections comprising the lowermost surfaces of the core assemblies and the coils being wound about the central limbs of the E-sections.

Abstract: The invention relates to a device for simultaneous peripheral electro-inductive hardening of bearing surfaces (2A, 3A) and transition A radii in crankshafts (1), comprising lifting pins (2, 3) arranged directly adjacent to each other and one behind the other with different angular positions on the plane perpendicular to the their axis of rotation (D), wherein inductors (8, 9) are provided which are placed on the lifting pins (2, 3) approximately in the same direction (C) thereof. A lifting pin (2, 3) is allocated to each inductor, which is arranged in such a way that it intersects the axial direction of the crankshaft (1). Said inductor comprises at least two inductor detents (8C, 8D, 9C, 9D) arranged parallel to each other. One inductor detent (8D, 9D) is arranged in an overlay area (4) of the lifting pins (2, 3) while the other inductor detent (8C, 9C) is arranged in an edge area of the lifting pin (2, 3) facing a cheek (5, 6).

Abstract: An induction hardening apparatus for inductively heating and quench hardening a crankshaft includes an arrangement of two workstations similarly configured and a robotic device indexing the crankshaft from a first workstation to a second workstation. The induction hardening apparatus is designed with a single induction coil located at the first workstation for the sequential induction heating and quench hardening of the pins of the crankshaft. At the second workstation, a single induction coil is used for the bearing surfaces of the crankshaft. One feature of the present invention is that the induction coils do not contact the surfaces of the crankshaft which are being inductively heated and quench hardened. Crankshaft dimensions and geometry are prograrmned into servodrive systems which move the corresponding coil in X and Y directions accurately tracing the orbit or path of each pin and each bearing surface.

Abstract: An apparatus is provided for simultaneously generating a fluid flow and heating the flowing fluid. The apparatus includes a conductive material provided on at least a part of a member which is rotated. The rotatable member generates the flow of the fluid to be heated. Magnets are opposed to one side of the conductive material with a slight gap and are mounted within a casing for the rotatable member. Fluid flows through the casing and is heated due to a slip heat energy generated by rotating the conductive material relative to the magnet.

Abstract: An external inductor for magnetic pulse welding and forming includes an outer steel frame and an inner beryllium-bronze alloy insert which is removably mounted within the frame. The steel frame and the beryllium bronze insert respectively split the responsibility for higher mechanical strength and more concentrated pulse current on the inner surface of inductor's central opening. The improved external inductor design is capable of creating greater impulse forces onto the outer workpiece and has been demonstrated to perform at least 25-30% more deformation than a simple one piece simple steel external inductor for a full metallurgical joint.