WO2019240014A1 - Object to be heated for electromagnetic induction heating device, method for heating object to be heated, and method for manufacturing aluminum foil - Google Patents

Object to be heated for electromagnetic induction heating device, method for heating object to be heated, and method for manufacturing aluminum foil Download PDF

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Publication number
WO2019240014A1
WO2019240014A1 PCT/JP2019/022603 JP2019022603W WO2019240014A1 WO 2019240014 A1 WO2019240014 A1 WO 2019240014A1 JP 2019022603 W JP2019022603 W JP 2019022603W WO 2019240014 A1 WO2019240014 A1 WO 2019240014A1
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WO
WIPO (PCT)
Prior art keywords
heated
electromagnetic induction
induction heating
heating device
magnets
Prior art date
Application number
PCT/JP2019/022603
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French (fr)
Japanese (ja)
Inventor
忠 窪野
精次 河本
Original Assignee
Tsk株式会社
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Publication date
Application filed by Tsk株式会社 filed Critical Tsk株式会社
Publication of WO2019240014A1 publication Critical patent/WO2019240014A1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications

Definitions

  • the present invention relates to an object to be heated for an electromagnetic induction heating apparatus that heats the object to be heated by generating an induction current, a method for heating the object to be heated, and a method for manufacturing an aluminum wheel.
  • an electromagnetic induction heating apparatus that heats an object to be heated made of a conductor by generating an induction current.
  • an induction current is generated in an object to be heated by rotationally driving the object to be heated made of an aluminum wheel with a rotating body in which a plurality of magnets face each other with the same magnetic pole.
  • An electromagnetic induction heating apparatus that heats by heating is disclosed.
  • the present invention has been made to address the above-described problems, and has as its object the object to be heated for an electromagnetic induction heating apparatus capable of shortening or equalizing the heating time, a method for heating the object to be heated, and aluminum
  • the object is to provide a method of manufacturing a wheel.
  • a feature of the present invention is an object to be heated consisting of a raw material or a semi-finished product to be softened by heating with an electromagnetic induction heating device in a process up to a finished product, the electromagnetic induction heating device comprising: A table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, a table driving means for relatively rotating and driving the object to be heated and the table, and the object to be heated opposed to each magnet of the table A workpiece support that is supported in a state, and heats an object to be heated by causing an induction current to be generated by rotating and rotating the object to be heated and a table that are opposed to each magnet.
  • the object to be heated is that a portion of the table facing the magnets is a flat surface parallel to the rotation surface of the magnets and having a flatness of 5 mm or less.
  • the object to be heated used in the electromagnetic induction heating device is a flat surface in which the portion of the table facing each magnet is parallel to the rotation surface of each magnet. Since a flat portion having a degree of 5 mm or less is formed, according to experiments by the present inventors, the heating time of the object to be heated can be shortened and the heating time can be made uniform.
  • the object to be heated is formed in a trapezoidal shape with a trapezoidal cross-sectional shape, and the planar portion has a trapezoidal shape.
  • the object to be heated is formed on the upper base surface of the trapezoidal shape.
  • the object to be heated used in the electromagnetic induction heating device has a trapezoidal cross-sectional shape and is formed in a bar shape, and the plane portion has a trapezoidal shape. It is formed on the surface of the trapezoidal upper base side of the object to be heated.
  • the to-be-heated object can reduce the time burden and economical burden of manufacture of a to-be-heated object compared with the case where a plane part is formed in the trapezoid-shaped lower-bottom side surface.
  • a portion that forms a flat portion can be formed at the bottom of the casting mold, so that the object to be heated can be easily cast.
  • the object to be heated is formed in a plate shape or a rod shape extending in a radial direction of a rotation circle of the table.
  • a rough portion in which a flat portion is not formed is formed in a central portion of a table that is relatively opposed to the table in the object to be heated and is relatively rotated, and the flat portion is formed outside the rough portion.
  • the object to be heated used in the electromagnetic induction heating device is a portion where the table in the object to be heated formed in a plate shape or a rod shape is opposed.
  • a rough portion having no flat portion is formed at the center portion of the relatively rotating table, and a flat portion is formed outside the rough portion.
  • the object to be heated does not need to form a flat portion having a high flatness for a portion where the induction current of the rotation center portion of the table is small, and the object to be heated can be manufactured while suppressing a decrease in the heating effect. Time burden and economic burden can be reduced.
  • the rough portion can be used as a space for marking such as the lot number or manufacturer name of the object to be heated.
  • the present invention can be implemented not only as an invention of an object to be heated for an electromagnetic induction heating apparatus, but also as an invention of a method for heating an object to be heated and a method for manufacturing an aluminum wheel.
  • the heating method of the object to be heated is such that a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction and a plate-shaped or rod-shaped object to be heated and the table are relatively rotated. It has a table driving means for driving and a work support that supports the object to be heated in a state of being opposed to each magnet of the table, and relatively rotates the object to be heated and the table arranged to face each magnet.
  • a method of heating an object to be heated using an electromagnetic induction heating device that heats an object to be heated by generating an induction current by displacing the object to be heated.
  • the method for heating the object to be heated is such that the object to be heated is formed in a trapezoidal shape with a cross-sectional shape extending in a rod shape, and the planar portion is the upper base of the trapezoidal shape in the trapezoidal object to be heated It may be formed on the side surface.
  • the heating method of a to-be-heated target object can anticipate the effect similar to the said to-be-heated target object.
  • the heating method of the object to be heated includes a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a table that relatively rotationally drives a plate-shaped or rod-shaped object to be heated and the table.
  • a driving means and a work support that supports the object to be heated in a state of being opposed to each magnet of the table, and the object to be heated and the table disposed to face each magnet are relatively rotationally displaced.
  • the A flat portion forming step of forming may be to include a work placement step of placing the same object to be heated so as to face each of the flat portion in each magnet to the workpiece support in the object to be heated. According to this, the heating method of the object to be heated can form the flat part by the flat part forming process even when the flat part does not exist in the heated object. The same effect can be expected.
  • the method for heating the object to be heated is such that the object to be heated is formed in a trapezoidal shape with a cross-sectional shape extending in a rod shape, and the flat surface forming step is a trapezoidal shape in the trapezoidal object to be heated.
  • a flat portion may be formed on the upper bottom surface.
  • the aluminum wheel manufacturing method specifically relates a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a rod-shaped object to be heated, which is a raw material of the aluminum wheel, and the table.
  • a table driving means for rotationally driving the workpiece and a workpiece support for supporting the object to be heated in a state of being opposed to each magnet of the table, and the object to be heated and the table arranged to face each magnet are relatively
  • the heating method of the object to be heated includes a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a table that relatively rotationally drives a plate-shaped or rod-shaped object to be heated and the table.
  • a driving means and a work support that supports the object to be heated in a state of being opposed to each magnet of the table, and the object to be heated and the table disposed to face each magnet are relatively rotationally displaced.
  • a method of heating an object to be heated using an electromagnetic induction heating apparatus that generates an induction current in the object to be heated and heats the object to be heated.
  • the heating method of the object to be heated can shorten and equalize the heating time as compared with the case where the other surface of the object to be heated is disposed opposite to each magnet.
  • the aluminum wheel manufacturing method specifically relates a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a rod-shaped object to be heated, which is a raw material of the aluminum wheel, and the table.
  • a table driving means for rotationally driving the workpiece and a workpiece support for supporting the object to be heated in a state of being opposed to each magnet of the table, and the object to be heated and the table arranged to face each magnet are relatively
  • positioning process which arrange
  • FIG. 1 It is a perspective view which shows the outline of the external appearance structure of the to-be-heated target object for electromagnetic induction heating apparatuses which concerns on one Embodiment of this invention. It is a perspective view which shows the outline of the external appearance structure which looked at the to-be-heated object for electromagnetic induction heating apparatuses shown in FIG. 1 from the opposite side of illustration up-down direction. It is a front view which shows typically the structure of the electromagnetic induction heating apparatus which heat-processes the to-be-heated target object for electromagnetic induction heating apparatuses shown in FIG. 1 and FIG. It is a block diagram of the control system which controls the action
  • FIG. 1 It is a top view which shows the outline of the external appearance structure of the table provided with the magnet which comprises the electromagnetic induction heating apparatus shown in FIG.
  • FIG. 1 It is a flowchart which shows the process of the heat processing operation
  • FIG. 1 It is a perspective view which shows the outline of the external appearance structure of the to-be-heated object for electromagnetic induction heating apparatuses for verifying the effect of this invention, Comprising: The plane part is not formed in the bottom face is there.
  • FIG. 1 is a perspective view showing an outline of an external configuration of an object to be heated 100 according to the present invention.
  • 2 is a perspective view showing an outline of an external configuration of the object to be heated 100 when the object 100 to be heated shown in FIG. 1 is viewed from the opposite side in the illustrated vertical direction.
  • FIG. 1 is a perspective view showing an outline of an external configuration of an object to be heated 100 according to the present invention.
  • FIG. 3 is a front view schematically showing the structure of an electromagnetic induction heating device 200 that heats the object to be heated 100 shown in FIGS. 1 and 2.
  • FIG. 4 is a block diagram of a control system that controls the operation of the electromagnetic induction heating device 200.
  • the object to be heated 100 is a raw material of an aluminum product such as an aluminum wheel or an aluminum sash, and is an object to be heated by an electromagnetic induction heating device 200 described later in the manufacturing process of these products.
  • the object to be heated 100 is an object to be heated by the electromagnetic induction heating device 200, and is configured by forming an aluminum material into a rod shape. More specifically, the object to be heated 100 is formed in a trapezoidal cone shape as a whole in which the cross-sectional shape is formed in a trapezoidal shape.
  • the object to be heated 100 has a flat portion 101 formed on the surface (upper surface in FIG. 1) on the side that becomes the upper base in the trapezoidal shape.
  • the flat portion 101 is a portion that is disposed opposite to the magnet 203 of the electromagnetic induction heating device 200, and is formed in a plane parallel to the rotation surface of the magnet 203 and having a flatness of 5 mm or less.
  • the flatness is the magnitude of deviation from the geometrically correct plane of the planar feature, and when the surface to be measured is sandwiched between two parallel virtual planes, It is represented by the interval between two planes when the interval is the minimum.
  • This flatness can be measured with a dial gauge, an optical flat (planar gauge), or a measuring instrument using laser light.
  • the surface other than the flat surface portion 101 in the object 100 to be heated specifically, the four side surfaces 102 adjacent to the flat surface portion 101 and the bottom surface 103 opposite to the flat surface portion 101 are each formed in a substantially flat surface.
  • the object to be heated 100 is formed by casting an aluminum material. That is, the object 100 to be heated is an ingot. For this reason, the bottom surface 103 of the object to be heated 100 is formed such that the center part is recessed by so-called sink marks at the time of casting. Further, the length of the object 100 to be heated is longer than the diameter of the table 201.
  • the electromagnetic induction heating device 200 is a mechanical device for generating an induction current in the object 100 to be heated and heating it. Each device 230 is provided.
  • the table 201 is a part for holding a plurality of magnets 203 and is configured by a circular plate-like body (hereinafter also referred to as “disk body”) in a plan view. More specifically, the table 201 is formed with a plurality of bottomed holes for holding the magnet 203 in an exposed state on the plate surface (the upper surface in the drawing) of the disk body. Further, the table 201 is provided with a shaft body 201 a extending in a rod shape from the center of the bottom surface (the lower surface in the drawing) of the disk body toward the lower side in the drawing, and the shaft body 201 a is electrically driven through a coupling 202. The output shaft of the motor 204 is connected.
  • the table 201 is made of a paramagnetic material (for example, aluminum, manganese, platinum, or glass) or a diamagnetic material (for example, copper, gold, silver, zinc, lead, glass, or wood).
  • the table 201 is made of an aluminum disk.
  • a magnet 203 and a work support 221 to be described later are indicated by two-dot chain lines.
  • the magnet 203 is a part for generating an induced current in the object 100 to be heated, and is formed in a cylindrical shape.
  • a plurality of magnets 203 are provided on the plate surface of the table 201.
  • each magnet 203 is embedded in the table 201 in such a direction that the same magnetic poles (N poles in the present embodiment) are exposed on the plate surface side of the table 201.
  • Each magnet 203 is held in a state of being flush with the plate surface of the table 201.
  • the magnets 203 are arranged concentrically around the rotational drive center of the table 201 and are arranged at equal intervals along the circumferential direction of the concentric circles. In this case, the magnet 203 is formed outside the rotation drive center portion of the table 201. As described above, the reason why the magnet 203 is not disposed at the rotation drive center portion of the table 201 is that the rotation drive speed of the rotation drive center portion is low and the heating efficiency is low.
  • each magnet 203 may be held in a state of entering inside the plate surface of the table 201, or may be held in a state of protruding from the plate surface.
  • positioning aspect of each magnet 203 is suitably determined according to the specification of the heating of the to-be-heated target object 100, and is naturally not limited to this embodiment.
  • the neodymium magnet is used for the magnet 203 in this embodiment, magnets other than a neodymium magnet, for example, various magnets, such as a ferrite, samarium cobalt, or alnico, can be used.
  • the electric motor 204 is a drive source for rotationally driving the table 201, and is configured by a servo motor whose operation is controlled by a control device 230 described later.
  • the electric motor 204 is supported by the approach mechanism 210.
  • the approach mechanism 210 is a mechanical device for bringing the table 201 together with or away from the object to be heated 100 together with the electric motor 204, and mainly includes a motor support 211, a linear guide 212, and a guide support 213. And a drive mechanism 214.
  • the motor support 211 is a part for supporting the electric motor 204, and is configured by forming a metal material in an L shape.
  • the motor support 211 is supported by the drive mechanism 214 while being connected to the guide support 213 via the linear guide 212.
  • the linear guide 212 is a component for guiding the table 201 and the electric motor 204 in a direction in which the table 201 and the electric motor 204 are approached or separated from the object to be heated 100, and is provided on the rail provided on the guide support 213 and the motor support 211. And a slider that reciprocally displaces on the rail.
  • the guide support body 213 is a part for supporting the rails constituting the linear guide 212, and is configured by forming a metal material in an L shape. In this case, the guide support 213 is formed to extend along the guide direction so as to support the rail along the guide direction of the table 201 and the electric motor 204.
  • the guide support 213 is supported by the outer support 220.
  • the drive mechanism 214 is a mechanical device that includes a drive source for displacing the table 201 and the electric motor 204 in a direction in which the table 201 and the electric motor 204 approach or separate from the object to be heated 100.
  • the drive mechanism 214 includes an electric motor (not shown) (for example, an AC servo motor) whose operation is controlled by the control device 230, a jack that converts the rotational driving force of the electric motor in the vertical direction shown in the figure, and the jack on the outer support 220. It has the support stand which supports by each, and is comprised.
  • the outer support body 220 is a part for supporting the approach mechanism 210 and the work support body 221, and is configured by assembling metal rods in a box shape.
  • the outer support 220 is provided with a top plate made of a plate-like body in which a through-hole through which the shaft body 201a of the table 201 passes is formed at the upper end in the figure, and a work support 221 is provided on the top plate. It has been.
  • the workpiece support 221 is a part for supporting the object to be heated 100 on the table 201, and the outer support on the outer side of the table 201 so that the object to be heated 100 is laid on the plate surface of the table 201. 220 is provided on each.
  • the work support 221 is provided at a position that supports the object to be heated 100 at a position that is offset radially outward with respect to the rotational drive center portion on the plate surface of the table 201.
  • the workpiece support 221 is formed in a V shape in which both end portions are fitted from above so as to support both ends of the object 100 to be heated from below with the plane portion 101 facing downward.
  • the work support 221 is provided with a temperature detector 222.
  • the temperature detector 222 detects the temperature of the object to be heated 100 and outputs it to the control device 230.
  • the control device 230 is configured by a microcomputer including a CPU, a ROM, a RAM, and the like.
  • the control device 230 comprehensively controls the entire operation of the electromagnetic induction heating device 200, and a heating processing program (not shown) stored in advance in the storage device. Is performed to heat the object 100 to be heated.
  • the control device 230 controls the operation of the electric motor 204 to rotationally drive the table 201 and also controls the operation of the approach mechanism 210 to control the vertical position of the table 201 in the figure.
  • the control device 230 includes an input device composed of a switch group that receives an instruction from an operator and inputs the command to the control device 230, an operation lamp 231 provided with a display lamp that displays an operation status of the control device 230, and a liquid crystal display device. It has. Although the control device 230 includes a power supply unit that receives power from an external power supply and supplies power to each unit such as the electric motor 204 and the approach mechanism 210, the control device 230 is not directly related to the present invention. Omitted.
  • the control device 230 may be housed in a metal box and attached to the outer surface of the outer support 220, but may be provided at a position away from the outer support 220 via a wire. Good.
  • the control device 230 executes a control program (not shown) to control the operation of the approach mechanism 210 to lower the table 201 and position it at a position farthest from the object 100 to be heated.
  • the worker performs a work placement process for setting the object to be heated 100 on the electromagnetic induction heating device 200.
  • the worker places the object to be heated 100 on the work support 221 in the electromagnetic induction heating device 200.
  • the operator places both end portions of the object to be heated 100 on the work support 221 so that the flat portion 101 of the object to be heated 100 faces the table 201.
  • the workpiece support 221 is composed of two inclined surfaces that open upward in a V shape, the workpiece support 221 fits stably with the side surface 102 formed of the inclined surface of the object to be heated 100.
  • the object 100 to be heated can be supported.
  • the set operation of the object to be heated 100 may be performed manually by an operator, or a mechanical device such as a robot arm that holds the object to be heated 100 and places it on the work support 221 is used. May be.
  • the operator positions the magnet 203 with respect to the object 100 to be heated. Specifically, the operator operates the operation panel 231 to operate the approach mechanism 210 so that the plate surface of the table 201 is brought closest to the flat surface portion 101 of the object 100 to be heated. Position it. In this case, the electromagnetic induction heating device 200 can be positioned at a position close to the position immediately before the two are in contact with each other because the planar portion 101 of the object to be heated 100 is disposed oppositely.
  • the worker heats the object 100 to be heated.
  • the operator operates the operation panel 231 to instruct the control device 230 to execute the heat treatment program.
  • the control device 230 rotates the table 201 by operating the electric motor 204. Thereby, the to-be-heated target object 100 is rapidly heated by the induced current produced inside.
  • the inventors have the same configuration as that of the object to be heated 100, that is, the flat surface portion 101 is formed on the upper bottom surface and the flat surface portion 101 is formed on the bottom surface 103.
  • a heated object 110 having a shape in which the central portion is recessed without being formed, and a heated object 120 in which a flat surface portion 101 (flatness of 1 mm or less) is formed on the bottom surface 103 of the heated object 100, respectively.
  • Several sets were prepared. Each of the object to be heated 110 and the object to be heated 120 is 5 kg.
  • the worker heats the object to be heated 110 and the object to be heated 120 when each bottom surface 103 is disposed opposite the table 201 and heated under the same conditions. And the relationship between the heating time and the heating time.
  • the horizontal axis is the time since the rotation of the table 201 is started, and the vertical axis is the temperature of the object 100 to be heated.
  • the heated object 120 in which the flat surface portion 101 according to the present invention is disposed to face the magnet 203 is arranged so that the flat surface portion 101 according to the present invention is disposed on the opposite side of the magnet 203.
  • the object 120 to be heated reaches 400 ° C. in approximately 141 seconds after starting to rotate the table 201 and is heated to 500 ° C. in approximately 221 seconds.
  • the object to be heated 110 reached 400 ° C. in about 481 seconds after starting to rotate the table 201, and did not reach 500 ° C. even after 601 seconds.
  • the worker stops heating the object 100 to be heated and removes it from the electromagnetic induction heating device 200.
  • the operator operates the operation panel 231 to instruct the control device 230 to stop executing the heat treatment program.
  • the control device 230 stops the rotation drive of the table 201 by stopping the operation of the electric motor 204. Thereby, the worker can take out the object 100 to be heated on the workpiece support 221.
  • the operator confirms the temperature of the object 100 to be heated displayed on the operation panel 231 and confirms that the object 100 to be heated has reached a predetermined temperature. Can do.
  • the operator experimentally obtains a time until the object 100 to be heated reaches a predetermined temperature in advance, and the object 100 to be heated has reached a predetermined temperature depending on whether or not the predetermined time has elapsed. You can also grasp that.
  • the control device 230 can automatically stop the operation of the electric motor 204 when the predetermined temperature is reached or when the predetermined time has elapsed.
  • the work to take out the object 100 to be heated may be performed manually by an operator, or a mechanical device such as a robot arm that holds the object 100 to be heated and carries it out from the work support 221 may be used. Good.
  • the worker puts the object 100 to be heated taken out from the electromagnetic induction heating device 200 into the melting furnace, and then pours the object 100 to be heated into a mold to form a molded product such as an aluminum wheel. Since the process of processing the object 100 to be heated taken out from the electromagnetic induction heating apparatus 200 is not directly related to the present invention, the description thereof is omitted.
  • the object to be heated 100 used in the electromagnetic induction heating device 200 is such that the portion of the table 201 that faces each magnet 203 is the rotation surface of each magnet 203. Since the flat portion 101 having a plane parallel to the surface and having a flatness of 5 mm or less is formed, the heating time of the object to be heated 100 can be shortened and the heating time can be made uniform. .
  • the implementation of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the object of the present invention.
  • subjected to the to-be-heated target object 100 is attached
  • the object to be heated 100 is formed by forming the flat portion 101 on the surface that is the upper bottom of the object to be heated 100 having a trapezoidal cross section (the upper surface in FIG. 1). .
  • the flat part 101 should just be formed in the surface which can be opposingly arranged to the magnet 203 provided in the table 201 in the to-be-heated target object 100.
  • FIG. Therefore, the plane portion 101 can be formed on each of the side surface 102 and the bottom surface 103 of the object to be heated 100.
  • the to-be-heated target object 100 is the whole surface of the surface (upper surface in FIG. 1) used as the upper bottom in the to-be-heated target object 100 in which the plane part 101 formed the trapezoidal shape in cross section. Formed.
  • the flat part 101 should just be formed in the surface which can be opposingly arranged to the magnet 203 provided in the table 201 in the to-be-heated target object 100.
  • the rotational speed of the central portion of the rotational drive of the table 201 is slower than the radially outer side. For this reason, the to-be-heated target object 100 has a relatively low heating effect at a portion disposed opposite to the central portion of the table 201 for rotational driving.
  • the object 100 to be heated does not form the flat portion 101 for the portion disposed opposite to the central portion of the rotational drive of the table 201 and has a flatness lower than the flatness of the flat portion 101.
  • the rough portion 104 can be formed in advance, and the flat portion 101 can be formed outside the rough portion 104. According to this, the object 100 to be heated can reduce the processing burden on the flat surface portion 101 and can be used as a space for marking the lot number or manufacturer name of the object 100 to be heated on the rough portion 104.
  • the flat portion 101 formed outside the rough portion 104 is indicated by hatching in order to clarify the difference between the rough portion 104 and the flat portion 101.
  • the object to be heated 100 is formed in a trapezoidal cone shape having a trapezoidal cross section.
  • the object to be heated 100 only needs to be formed in a shape that can be disposed opposite to the magnet 203 provided on the table 201 in the object to be heated 100. Therefore, the to-be-heated object 100 can be constituted by a flat plate-like body in addition to a rod-like body having a cross-sectional shape of a square or a polygon such as a triangle.
  • the object to be heated 100 may have a flat surface portion 101 formed on at least a part of the outer surface.
  • the table 201 is defined as a part having the highest flatness in the outer surface of the object 100 to be heated.
  • the object 100 to be heated is heated before the object 100 is heated by the electromagnetic induction heating device 200 as shown in FIG.
  • a plane portion forming step of forming the plane portion 101 on at least a part of the outer surface of the substrate can be performed.
  • the flat surface portion forming step is performed by performing various kinds of machining such as cutting, forging or rolling on at least a part of the outer surface of the object 100 to be heated on which the flat surface 101 is not formed.
  • the portion 101 may be formed.
  • the object to be heated 100 is composed of an ingot as a raw material for an aluminum product such as an aluminum wheel or an aluminum sash.
  • the object to be heated 100 may be an ingot as a raw material of various products other than an aluminum wheel or an aluminum sash (for example, an aluminum cylinder block).
  • the object to be heated 100 is a paramagnetic material other than an aluminum material (for example, aluminum, manganese, platinum, or glass) or a diamagnetic material (for example, copper, gold, silver, zinc, lead, glass, or wood). It can also be comprised with the material of.
  • the object to be heated 100 may be a semi-finished product obtained by processing a raw material before reaching a finished product such as an aluminum wheel or an aluminum sash.
  • a finished product such as an aluminum wheel or an aluminum sash.
  • the flatness of the portion of the semi-finished product that faces the magnet 203 is preferably 5 mm or less.
  • the table 201 is formed in a disc shape.
  • the table 201 may be formed in a shape other than a circle (including an ellipse) in a plan view, for example, a polygonal shape such as a square, a triangle, or a hexagon.
  • the flat part 101 should just be formed in the plane parallel to the rotating surface which the table 201 or the magnet 203 rotationally drives, and flatness is 5 mm or less.
  • the electromagnetic induction heating device 200 is configured such that the table 201 is rotationally driven with respect to the object 100 to be heated. That is, the electric motor 204 corresponds to the table driving means according to the present invention.
  • the electromagnetic induction heating device 200 only needs to be configured such that the table 201 rotates relative to the object 100 to be heated. Therefore, the electromagnetic induction heating device 200 can also be configured by providing table driving means so that the object to be heated 100 is rotationally driven with respect to the table 201.
  • the flatness of the flat portion 101 is 5 mm or less.
  • the flatness increases as the gap amount decreases, and the heating time of the object 100 to be heated can be shortened and the heating time can be made uniform. Therefore, the flatness in the flat portion 101 is preferably 3 mm or less, more preferably 1 mm or less.
  • the workpiece support 221 has a V-shaped cross section into which the heated object 100 formed in a trapezoidal cone shape is fitted from above.
  • the workpiece support body should just be comprised so that the to-be-heated target object 100 may be detachably supported. Therefore, the workpiece support 221 may further include a clamp mechanism that presses the object to be heated from above or from the side while the object 100 to be heated is placed. Further, the workpiece support 221 can be configured to support the object to be heated 100 while moving on the table 201 like a belt conveyor.
  • DESCRIPTION OF SYMBOLS 100 ... Object to be heated, 101 ... Plane part, 102 ... Side face, 103 ... Bottom face, 104 ... Rough part, 110 ... object to be heated, 120 ... object to be heated, DESCRIPTION OF SYMBOLS 200 ... Electromagnetic induction heating apparatus, 201 ... Table, 201a ... Shaft body, 202 ... Coupling, 203 ... Magnet, 204 ... Electric motor, 210 ... approach mechanism, 211 ... motor support, 212 ... linear guide, 213 ... guide support, 214 ... drive mechanism, 220 ... outer support, 221 ... work support, 222 ... temperature detector, 230: Control device, 231: Operation panel.

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  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Abstract

The present invention provides an object to be heated for an electromagnetic induction heating device, a method for heating the object to be heated, and a method for manufacturing aluminum foil, wherein heating time can be reduced or uniformized. The object 100 to be heated, which is to be heated by the electromagnetic induction heating device 200, is formed in an overall shape of a truncated trapezoidal cone having a trapezoidal cross section. The object 100 to be heated has a planar part 101 on a surface on the side serving as the upper side of the trapezoidal shape. The planar part 101 is a portion arranged facing a magnet 203 of the electromagnetic induction heating device 200, is a plane parallel to the rotary surface of the magnet 203, and is formed to have a flatness of no greater than 5 mm. In the object 100 to be heated, four side surfaces 102, which are surfaces other than the planar part 101 and are adjacent to the planar part 101, and a bottom surface 103 on the reverse side from the planar part 101 are each formed in an approximate plane. The object 100 to be heated is formed by casting an aluminum material.

Description

電磁誘導加熱装置用の被加熱対象物、被加熱対象物の加熱方法およびアルミホイールの製造方法Object to be heated for electromagnetic induction heating device, method for heating object to be heated, and method for manufacturing aluminum wheel
　本発明は、被加熱対象物に誘導電流を生じさせて加熱する電磁誘導加熱装置用の被加熱対象物、被加熱対象物の加熱方法およびアルミホイールの製造方法に関する。 The present invention relates to an object to be heated for an electromagnetic induction heating apparatus that heats the object to be heated by generating an induction current, a method for heating the object to be heated, and a method for manufacturing an aluminum wheel.
　従来から、導体からなる被加熱対象物に誘導電流を生じさせて加熱する電磁誘導加熱装置が知られている。例えば、下記特許文献１には、アルミホイールからなる被加熱対象物に対して複数の磁石が同じ磁極で対向する回転体を配置した状態で回転駆動することによって被加熱対象物に誘導電流を生じさせて加熱する電磁誘導加熱装置が開示されている。 Conventionally, an electromagnetic induction heating apparatus that heats an object to be heated made of a conductor by generating an induction current is known. For example, in Patent Document 1 below, an induction current is generated in an object to be heated by rotationally driving the object to be heated made of an aluminum wheel with a rotating body in which a plurality of magnets face each other with the same magnetic pole. An electromagnetic induction heating apparatus that heats by heating is disclosed.
特開２０１８－１８６０４号公報Japanese Patent Laid-Open No. 2018-18604
　しかしながら、上記特許文献１に記載された電磁誘導加熱装置を用いて被加熱対象物を加熱した場合、同じ形状の被加熱対象物であっても被加熱対象物ごとに所定温度に達するまでの時間が異なるまたは時間を掛けても所定温度に達しない現象が生じて加熱効率が低いという問題があった。 However, when the object to be heated is heated using the electromagnetic induction heating device described in Patent Document 1, the time required to reach a predetermined temperature for each object to be heated is the same shape to be heated. However, there is a problem that the heating efficiency is low due to the phenomenon that the temperature does not reach the predetermined temperature even when the time is different or the time is increased.
　本発明は上記問題に対処するためなされたもので、その目的は、加熱時間の短縮化または均一化することができる電磁誘導加熱装置用の被加熱対象物、被加熱対象物の加熱方法およびアルミホイールの製造方法を提供することにある。 The present invention has been made to address the above-described problems, and has as its object the object to be heated for an electromagnetic induction heating apparatus capable of shortening or equalizing the heating time, a method for heating the object to be heated, and aluminum The object is to provide a method of manufacturing a wheel.
　上記目的を達成するため、本発明の特徴は、完成品に至るまでの工程において電磁誘導加熱装置による加熱によって軟化させる原料または半製品からなる被加熱対象物であって、電磁誘導加熱装置は、複数の磁石の各磁極が同じ向きで平面的に配置されたテーブルと、被加熱対象物とテーブルとを相対的に回転駆動するテーブル駆動手段と、被加熱対象物をテーブルの各磁石に対向した状態で支持するワーク支持体とを有して、各磁石に対向配置した被加熱対象物とテーブルとを相対的に回転変位させることによって被加熱対象物に誘導電流を生じさせて加熱するものであり、被加熱対象物は、テーブルの各磁石に対向する部分が同各磁石の回転面に対して平行な平面でかつ平面度が５ｍｍ以下である平面部が形成されていることにある。 In order to achieve the above object, a feature of the present invention is an object to be heated consisting of a raw material or a semi-finished product to be softened by heating with an electromagnetic induction heating device in a process up to a finished product, the electromagnetic induction heating device comprising: A table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, a table driving means for relatively rotating and driving the object to be heated and the table, and the object to be heated opposed to each magnet of the table A workpiece support that is supported in a state, and heats an object to be heated by causing an induction current to be generated by rotating and rotating the object to be heated and a table that are opposed to each magnet. In addition, the object to be heated is that a portion of the table facing the magnets is a flat surface parallel to the rotation surface of the magnets and having a flatness of 5 mm or less.
　このように構成した本発明の特徴によれば、電磁誘導加熱装置に用いられる被加熱対象物は、テーブルの各磁石に対向する部分が同各磁石の回転面に対して平行な平面でかつ平面度が５ｍｍ以下である平面部が形成されているため、本発明者らの実験によれば、被加熱対象物の加熱時間を短縮化することができるとともに加熱時間を均一化することができる。 According to the feature of the present invention configured as described above, the object to be heated used in the electromagnetic induction heating device is a flat surface in which the portion of the table facing each magnet is parallel to the rotation surface of each magnet. Since a flat portion having a degree of 5 mm or less is formed, according to experiments by the present inventors, the heating time of the object to be heated can be shortened and the heating time can be made uniform.
　また、本発明の他の特徴は、前記電磁誘導加熱装置用の被加熱対象物において、被加熱対象物は、断面形状が台形形状で棒状に延びて形成されており、平面部は、台形形状の被加熱対象物における台形形状の上底側の面に形成されていることにある。 Another feature of the present invention is that in the object to be heated for the electromagnetic induction heating device, the object to be heated is formed in a trapezoidal shape with a trapezoidal cross-sectional shape, and the planar portion has a trapezoidal shape. The object to be heated is formed on the upper base surface of the trapezoidal shape.
　このように構成した本発明の他の特徴によれば、電磁誘導加熱装置に用いられる被加熱対象物は、断面形状が台形形状で棒状に延びて形成されているとともに、平面部が台形形状の被加熱対象物における台形形状の上底側の面に形成されている。これにより、被加熱対象物は、台形形状の下底側の面に平面部を形成する場合に比べて、被加熱対象物の製作の時間的負担および経済的負担を軽減することができる。特に、被加熱対象物を鋳造加工によって成形する場合においては、鋳造型の底部に平面部を形成する部分を形成できるため、被加熱対象物を容易に鋳造することができる。 According to another feature of the present invention configured as described above, the object to be heated used in the electromagnetic induction heating device has a trapezoidal cross-sectional shape and is formed in a bar shape, and the plane portion has a trapezoidal shape. It is formed on the surface of the trapezoidal upper base side of the object to be heated. Thereby, the to-be-heated object can reduce the time burden and economical burden of manufacture of a to-be-heated object compared with the case where a plane part is formed in the trapezoid-shaped lower-bottom side surface. In particular, when the object to be heated is formed by casting, a portion that forms a flat portion can be formed at the bottom of the casting mold, so that the object to be heated can be easily cast.
　また、本発明の他の特徴は、前記電磁誘導加熱装置用の被加熱対象物において、被加熱対象物は、テーブルの回転円の径方向に延びる板状または棒状に形成されているとともに、同被加熱対象物におけるテーブルが対向配置される部分であって相対的に回転するテーブルの中心部分に平面部が形成されていないラフ部が形成されており、平面部は、ラフ部の外側に形成されていることにある。 Another feature of the present invention is that in the object to be heated for the electromagnetic induction heating device, the object to be heated is formed in a plate shape or a rod shape extending in a radial direction of a rotation circle of the table. A rough portion in which a flat portion is not formed is formed in a central portion of a table that is relatively opposed to the table in the object to be heated and is relatively rotated, and the flat portion is formed outside the rough portion. There is in being.
　このように構成した本発明の他の特徴によれば、電磁誘導加熱装置に用いられる被加熱対象物は、板状または棒状に形成された被加熱対象物におけるテーブルが対向配置される部分であって相対的に回転するテーブルの中心部分に平面部が形成されていないラフ部が形成されるとともに、このラフ部の外側に平面部が形成されている。これにより、被加熱対象物は、テーブルの回転中心部分の誘導電流の発生が少ない部分について高い平面度の平面部を形成する必要がなく、加熱効果の低下を抑えつつ被加熱対象物の製作の時間的負担および経済的負担を軽減することができる。また、ラフ部は、被加熱対象物のロット番号または製造者名などの刻印のスペースとして使用することができる。 According to another feature of the present invention configured as described above, the object to be heated used in the electromagnetic induction heating device is a portion where the table in the object to be heated formed in a plate shape or a rod shape is opposed. A rough portion having no flat portion is formed at the center portion of the relatively rotating table, and a flat portion is formed outside the rough portion. As a result, the object to be heated does not need to form a flat portion having a high flatness for a portion where the induction current of the rotation center portion of the table is small, and the object to be heated can be manufactured while suppressing a decrease in the heating effect. Time burden and economic burden can be reduced. The rough portion can be used as a space for marking such as the lot number or manufacturer name of the object to be heated.
　また、本発明は、電磁誘導加熱装置用の被加熱対象物の発明として実施できるばかりでなく、被加熱対象物の加熱方法およびアルミホイールの製造方法の発明としても実施できるものである。 Further, the present invention can be implemented not only as an invention of an object to be heated for an electromagnetic induction heating apparatus, but also as an invention of a method for heating an object to be heated and a method for manufacturing an aluminum wheel.
　具体的には、被加熱対象物の加熱方法は、複数の磁石の各磁極が同じ向きで平面的に配置されたテーブルと、板状または棒状の被加熱対象物とテーブルとを相対的に回転駆動するテーブル駆動手段と、被加熱対象物をテーブルの各磁石に対向した状態で支持するワーク支持体とを有して、各磁石に対向配置した被加熱対象物とテーブルとを相対的に回転変位させることによって被加熱対象物に誘導電流を生じさせて加熱する電磁誘導加熱装置を用いた被加熱対象物の加熱方法であって、被加熱対象物は、完成品に至るまでの工程において電磁誘導加熱装置による加熱によって軟化させる原料または半製品であるとともに、外表面のうちの少なくとも一部に、各磁石の回転面に対して平行な平面でかつ平面度が５ｍｍ以下である平面部を有しており、被加熱対象物における平面部を各磁石に対向配置するように同被加熱対象物をワーク支持体に配置するワーク配置工程を含むようにすればよい。これによれば、被加熱対象物の加熱方法は、被加熱対象物における他の面を各磁石に対向配置した場合に比べて、加熱時間の短縮化および均一化を図ることができる。 Specifically, the heating method of the object to be heated is such that a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction and a plate-shaped or rod-shaped object to be heated and the table are relatively rotated. It has a table driving means for driving and a work support that supports the object to be heated in a state of being opposed to each magnet of the table, and relatively rotates the object to be heated and the table arranged to face each magnet. A method of heating an object to be heated using an electromagnetic induction heating device that heats an object to be heated by generating an induction current by displacing the object to be heated. It is a raw material or semi-finished product that is softened by heating with an induction heating device, and at least a part of the outer surface has a flat portion that is parallel to the rotating surface of each magnet and has a flatness of 5 mm or less. Shi Cage, it is sufficient to include a work placement step of placing the same object to be heated so as to face each of the flat portion in each magnet to the workpiece support in the object to be heated. According to this, the heating method of the object to be heated can shorten and equalize the heating time as compared with the case where the other surface of the object to be heated is disposed opposite to each magnet.
　この場合、被加熱対象物の加熱方法は、被加熱対象物は、断面形状が台形形状で棒状に延びて形成されており、平面部は、台形形状の被加熱対象物における台形形状の上底側の面に形成するとよい。これによれば、被加熱対象物の加熱方法は、上記被加熱対象物と同様の作用効果を期待することができる。 In this case, the method for heating the object to be heated is such that the object to be heated is formed in a trapezoidal shape with a cross-sectional shape extending in a rod shape, and the planar portion is the upper base of the trapezoidal shape in the trapezoidal object to be heated It may be formed on the side surface. According to this, the heating method of a to-be-heated target object can anticipate the effect similar to the said to-be-heated target object.
　また、被加熱対象物の加熱方法は、複数の磁石の各磁極が同じ向きで平面的に配置されたテーブルと、板状または棒状の被加熱対象物とテーブルとを相対的に回転駆動するテーブル駆動手段と、被加熱対象物をテーブルの各磁石に対向した状態で支持するワーク支持体とを有して、各磁石に対向配置した被加熱対象物とテーブルとを相対的に回転変位させることによって被加熱対象物に誘導電流を生じさせて加熱する電磁誘導加熱装置を用いた被加熱対象物の加熱方法であって、被加熱対象物は、完成品に至るまでの工程において電磁誘導加熱装置による加熱によって軟化させる原料または半製品であり、被加熱対象物の外表面のうちの少なくとも一部に、前記各磁石の回転面に対して平行な平面でかつ平面度が５ｍｍ以下である平面部を形成する平面部形成工程と、被加熱対象物における平面部を各磁石に対向配置するように同被加熱対象物をワーク支持体に配置するワーク配置工程とを含むようにするとよい。これによれば、被加熱対象物の加熱方法は、被加熱対象物に平面部が存在していない場合であっても平面部形成工程によって平面部を形成することができ、上記被加熱対象物と同様の作用効果を期待することができる。 In addition, the heating method of the object to be heated includes a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a table that relatively rotationally drives a plate-shaped or rod-shaped object to be heated and the table. A driving means and a work support that supports the object to be heated in a state of being opposed to each magnet of the table, and the object to be heated and the table disposed to face each magnet are relatively rotationally displaced. A heating method of an object to be heated using an electromagnetic induction heating device that heats the object to be heated by generating an induction current, and the object to be heated is an electromagnetic induction heating device in a process up to a finished product A flat part that is a raw material or a semi-finished product that is softened by heating, and that is parallel to the rotating surface of each magnet and has a flatness of 5 mm or less on at least a part of the outer surface of the object to be heated The A flat portion forming step of forming, may be to include a work placement step of placing the same object to be heated so as to face each of the flat portion in each magnet to the workpiece support in the object to be heated. According to this, the heating method of the object to be heated can form the flat part by the flat part forming process even when the flat part does not exist in the heated object. The same effect can be expected.
　この場合、被加熱対象物の加熱方法は、被加熱対象物は、断面形状が台形形状で棒状に延びて形成されており、平面部形成工程は、台形形状の被加熱対象物における台形形状の上底側の面に平面部を形成するとよい。これによれば、被加熱対象物の加熱方法は、上記被加熱対象物と同様の作用効果を期待することができる。 In this case, the method for heating the object to be heated is such that the object to be heated is formed in a trapezoidal shape with a cross-sectional shape extending in a rod shape, and the flat surface forming step is a trapezoidal shape in the trapezoidal object to be heated. A flat portion may be formed on the upper bottom surface. According to this, the heating method of a to-be-heated target object can anticipate the effect similar to the said to-be-heated target object.
　また、アルミホイールの製造方法は、具体的には、複数の磁石の各磁極が同じ向きで平面的に配置されたテーブルと、アルミホイールの原料である棒状の被加熱対象物とテーブルとを相対的に回転駆動するテーブル駆動手段と、被加熱対象物をテーブルの各磁石に対向した状態で支持するワーク支持体とを有して、各磁石に対向配置した被加熱対象物とテーブルとを相対的に回転変位させることによって被加熱対象物に誘導電流を生じさせて加熱により軟化させる電磁誘導加熱装置を用いたアルミホイールの製造方法であって、被加熱対象物は、外表面のうちの少なくとも一部に、各磁石の回転面に対して平行な平面でかつ平面度が５ｍｍ以下である平面部を有しており、被加熱対象物における平面部を各磁石に対向配置するように同被加熱対象物をワーク支持体に配置するワーク配置工程を含むようにすればよい。これによれば、アルミホイールの製造方法は、上記被加熱対象物および被加熱対象物の加熱方法と同様の作用効果を期待することができる。 In addition, the aluminum wheel manufacturing method specifically relates a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a rod-shaped object to be heated, which is a raw material of the aluminum wheel, and the table. A table driving means for rotationally driving the workpiece and a workpiece support for supporting the object to be heated in a state of being opposed to each magnet of the table, and the object to be heated and the table arranged to face each magnet are relatively A method of manufacturing an aluminum wheel using an electromagnetic induction heating device that generates an induction current in a heated object by causing rotational displacement and softens it by heating, wherein the heated object is at least one of the outer surfaces Some of them have a plane part parallel to the rotation surface of each magnet and having a flatness of 5 mm or less, and the same part is placed so that the plane part of the object to be heated faces each magnet. Addition It is sufficient to include a work placement step of placing an object on the work support. According to this, the manufacturing method of an aluminum wheel can expect the effect similar to the heating method of the said to-be-heated target object and a to-be-heated target object.
　また、被加熱対象物の加熱方法は、複数の磁石の各磁極が同じ向きで平面的に配置されたテーブルと、板状または棒状の被加熱対象物とテーブルとを相対的に回転駆動するテーブル駆動手段と、被加熱対象物をテーブルの各磁石に対向した状態で支持するワーク支持体とを有して、各磁石に対向配置した被加熱対象物とテーブルとを相対的に回転変位させることによって被加熱対象物に誘導電流を生じさせて加熱する電磁誘導加熱装置を用いた被加熱対象物の加熱方法であって、被加熱対象物の外表面のうちの最も平面度が高い部分を平面部として各磁石に対向配置するように同被加熱対象物をワーク支持体に配置するワーク配置工程を含むようにすればよい。これによれば、被加熱対象物の加熱方法は、被加熱対象物における他の面を各磁石に対向配置した場合に比べて、加熱時間の短縮化および均一化を図ることができる。また、アルミホイールの製造方法は、具体的には、複数の磁石の各磁極が同じ向きで平面的に配置されたテーブルと、アルミホイールの原料である棒状の被加熱対象物とテーブルとを相対的に回転駆動するテーブル駆動手段と、被加熱対象物をテーブルの各磁石に対向した状態で支持するワーク支持体とを有して、各磁石に対向配置した被加熱対象物とテーブルとを相対的に回転変位させることによって被加熱対象物に誘導電流を生じさせて加熱する電磁誘導加熱装置を用いたアルミホイールの製造方法であって、被加熱対象物の外表面のうちの最も平面度が高い部分を平面部として各磁石に対向配置するように同被加熱対象物をワーク支持体に配置するワーク配置工程を含むようにすればよい。これによれば、アルミホイールの製造方法は、上記被加熱対象物および被加熱対象物の加熱方法と同様の作用効果を期待することができる。 In addition, the heating method of the object to be heated includes a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a table that relatively rotationally drives a plate-shaped or rod-shaped object to be heated and the table. A driving means and a work support that supports the object to be heated in a state of being opposed to each magnet of the table, and the object to be heated and the table disposed to face each magnet are relatively rotationally displaced. A method of heating an object to be heated using an electromagnetic induction heating apparatus that generates an induction current in the object to be heated and heats the object to be heated. What is necessary is just to include the workpiece | work arrangement | positioning process which arrange | positions the said to-be-heated target object to a workpiece | work support body so that it may arrange | position facing each magnet as a part. According to this, the heating method of the object to be heated can shorten and equalize the heating time as compared with the case where the other surface of the object to be heated is disposed opposite to each magnet. In addition, the aluminum wheel manufacturing method specifically relates a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a rod-shaped object to be heated, which is a raw material of the aluminum wheel, and the table. A table driving means for rotationally driving the workpiece and a workpiece support for supporting the object to be heated in a state of being opposed to each magnet of the table, and the object to be heated and the table arranged to face each magnet are relatively A method of manufacturing an aluminum wheel using an electromagnetic induction heating device that heats an object to be heated by generating an induction current by rotationally moving the object, wherein the flatness of the outer surface of the object to be heated is the highest. What is necessary is just to include the workpiece | work arrangement | positioning process which arrange | positions the to-be-heated target object to a workpiece | work support body so that it may arrange | position with each magnet facing a high part as a plane part. According to this, the manufacturing method of an aluminum wheel can expect the effect similar to the heating method of the said to-be-heated target object and a to-be-heated target object.
本発明の一実施形態に係る電磁誘導加熱装置用被加熱対象物の外観構成の概略を示す斜視図である。It is a perspective view which shows the outline of the external appearance structure of the to-be-heated target object for electromagnetic induction heating apparatuses which concerns on one Embodiment of this invention. 図１に示す電磁誘導加熱装置用被加熱対象物を図示上下方向の反対側から見た外観構成の概略を示す斜視図である。It is a perspective view which shows the outline of the external appearance structure which looked at the to-be-heated object for electromagnetic induction heating apparatuses shown in FIG. 1 from the opposite side of illustration up-down direction. 図１および図２に示す電磁誘導加熱装置用被加熱対象物を加熱処理する電磁誘導加熱装置の構造を模式的に示す正面図である。It is a front view which shows typically the structure of the electromagnetic induction heating apparatus which heat-processes the to-be-heated target object for electromagnetic induction heating apparatuses shown in FIG. 1 and FIG. 電磁誘導加熱装置の作動を制御する制御システムのブロック図である。It is a block diagram of the control system which controls the action | operation of an electromagnetic induction heating apparatus. 図３に示す電磁誘導加熱装置を構成する磁石を備えたテーブルの外観構成の概略を示す平面図である。It is a top view which shows the outline of the external appearance structure of the table provided with the magnet which comprises the electromagnetic induction heating apparatus shown in FIG. 本発明に係る電磁誘導加熱装置用被加熱対象物の加熱処理作業の工程を示すフローチャートである。It is a flowchart which shows the process of the heat processing operation | work of the to-be-heated target object for electromagnetic induction heating apparatuses which concerns on this invention. 本発明の効果を検証するための電磁誘導加熱装置用被加熱対象物であって、底面に平面部が形成されていない電磁誘導加熱装置用被加熱対象物の外観構成の概略を示す斜視図である。It is a perspective view which shows the outline of the external appearance structure of the to-be-heated object for electromagnetic induction heating apparatuses for verifying the effect of this invention, Comprising: The plane part is not formed in the bottom face is there. 本発明の効果を検証するための電磁誘導加熱装置用被加熱対象物であって、底面に平面部が形成されている電磁誘導加熱装置用被加熱対象物の外観構成の概略を示す斜視図である。It is a to-be-heated object for electromagnetic induction heating apparatuses for verifying the effect of this invention, Comprising: It is a perspective view which shows the outline of the external appearance structure of the to-be-heated object for electromagnetic induction heating apparatuses in which the plane part is formed in the bottom face. is there. 図７に示す電磁誘導加熱装置用加熱対象物および図８に示す電磁誘導加熱装置用加熱対象物をそれぞれテーブルに対向配置した場合におけるテーブルの回転駆動開始後の時間（秒）と温度変化との関係を示すグラフである。When the heating object for the electromagnetic induction heating apparatus shown in FIG. 7 and the heating object for the electromagnetic induction heating apparatus shown in FIG. It is a graph which shows a relationship. 本発明の変形例に係る電磁誘導加熱装置用被加熱対象物の外観構成の概略を示す斜視図である。It is a perspective view which shows the outline of the external appearance structure of the to-be-heated target object for electromagnetic induction heating apparatuses which concerns on the modification of this invention. 本発明の他の変形例に係る電磁誘導加熱装置用被加熱対象物の加熱処理作業の工程を示すフローチャートである。It is a flowchart which shows the process of the heat processing operation | work of the to-be-heated target object for electromagnetic induction heating apparatuses which concerns on the other modification of this invention.
　以下、本発明に係る電磁誘導加熱装置用被加熱対象物（以下、単に「被加熱対象物」という）、被加熱対象物の加熱方法およびアルミホイールの加熱方法の一実施形態について図面を参照しながら説明する。図１は、本発明に係る被加熱対象物１００の外観構成の概略を示す斜視図である。また、図２は、図１に示す被加熱対象物１００を図示上下方向の反対側から見た被加熱対象物１００の外観構成の概略を示す斜視図である。また、図３は、図１および図２に示す被加熱対象物１００を加熱処理する電磁誘導加熱装置２００の構造を模式的に示す正面図である。また、図４は、電磁誘導加熱装置２００の作動を制御する制御システムのブロック図である。この被加熱対象物１００は、アルミホイールまたはアルミサッシなどのアルミニウム製の製品の原料であり、これらの製品の製造過程において後述する電磁誘導加熱装置２００によって加熱される対象物である。 DETAILED DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of an object to be heated for an electromagnetic induction heating device (hereinafter simply referred to as “object to be heated”), a method for heating an object to be heated, and a method for heating an aluminum wheel according to the present invention will be described with reference to the drawings. While explaining. FIG. 1 is a perspective view showing an outline of an external configuration of an object to be heated 100 according to the present invention. 2 is a perspective view showing an outline of an external configuration of the object to be heated 100 when the object 100 to be heated shown in FIG. 1 is viewed from the opposite side in the illustrated vertical direction. FIG. 3 is a front view schematically showing the structure of an electromagnetic induction heating device 200 that heats the object to be heated 100 shown in FIGS. 1 and 2. FIG. 4 is a block diagram of a control system that controls the operation of the electromagnetic induction heating device 200. The object to be heated 100 is a raw material of an aluminum product such as an aluminum wheel or an aluminum sash, and is an object to be heated by an electromagnetic induction heating device 200 described later in the manufacturing process of these products.
（被加熱対象物１００の構成）
　被加熱対象物１００は、電磁誘導加熱装置２００によって加熱される対象物であり、アルミニウム材を棒状に形成して構成されている。より具体的には、被加熱対象物１００は、断面形状が台形形状に形成された全体として台形錐形状に形成されている。この被加熱対象物１００は、台形形状における上底となる側の面（図１における上面）に平面部１０１が形成されている。 (Configuration of heated object 100)
The object to be heated 100 is an object to be heated by the electromagnetic induction heating device 200, and is configured by forming an aluminum material into a rod shape. More specifically, the object to be heated 100 is formed in a trapezoidal cone shape as a whole in which the cross-sectional shape is formed in a trapezoidal shape. The object to be heated 100 has a flat portion 101 formed on the surface (upper surface in FIG. 1) on the side that becomes the upper base in the trapezoidal shape.
　平面部１０１は、電磁誘導加熱装置２００の磁石２０３に対向配置する部分であり、磁石２０３の回転面に対して平行な平面でかつ平面度が５ｍｍ以下に形成されている。ここで、平面度とは、平面形体の幾何学的に正しい平面からの狂いの大きさであり、測定対象となる表面を２つの平行な仮想平面で挟んだときに、これら２つの仮想平面の間隔が最小となる場合の２平面の間隔で表されるものである。この平面度は、ダイヤルゲージ、オプティカルフラット（平面ゲージ）またはレーザー光を用いた測定器などで測定することができる。 The flat portion 101 is a portion that is disposed opposite to the magnet 203 of the electromagnetic induction heating device 200, and is formed in a plane parallel to the rotation surface of the magnet 203 and having a flatness of 5 mm or less. Here, the flatness is the magnitude of deviation from the geometrically correct plane of the planar feature, and when the surface to be measured is sandwiched between two parallel virtual planes, It is represented by the interval between two planes when the interval is the minimum. This flatness can be measured with a dial gauge, an optical flat (planar gauge), or a measuring instrument using laser light.
　被加熱対象物１００における平面部１０１以外の面、具体的には、平面部１０１に隣接する４つの側面１０２および平面部１０１とは反対側の底面１０３はそれぞれ略平面に形成されている。この被加熱対象物１００は、本実施形態においては、アルミニウム材を鋳造加工して形成されている。すなわち、被加熱対象物１００は、鋳塊である。このため、被加熱対象物１００における底面１０３は、中央部が鋳造加工時における所謂ヒケにより凹んで形成されている。また、被加熱対象物１００の長手方向の長さは、テーブル２０１の直径よりも長い長さに形成されている。 The surface other than the flat surface portion 101 in the object 100 to be heated, specifically, the four side surfaces 102 adjacent to the flat surface portion 101 and the bottom surface 103 opposite to the flat surface portion 101 are each formed in a substantially flat surface. In the present embodiment, the object to be heated 100 is formed by casting an aluminum material. That is, the object 100 to be heated is an ingot. For this reason, the bottom surface 103 of the object to be heated 100 is formed such that the center part is recessed by so-called sink marks at the time of casting. Further, the length of the object 100 to be heated is longer than the diameter of the table 201.
（電磁誘導加熱装置２００の構成）
　電磁誘導加熱装置２００は、被加熱対象物１００に誘導電流を生じさせて加熱するための機械装置であり、主として、テーブル２０１、磁石２０３、電動モータ２０４、アプローチ機構２１０、ワーク支持体２２１および制御装置２３０をそれぞれ備えている。 (Configuration of electromagnetic induction heating apparatus 200)
The electromagnetic induction heating device 200 is a mechanical device for generating an induction current in the object 100 to be heated and heating it. Each device 230 is provided.
　テーブル２０１は、図５に示すように、複数の磁石２０３を保持するための部品であり、平面視で円形状の板状体（以下、「円板体」ともいう）で構成されている。より具体的には、テーブル２０１は、円板体の板面（図示上面）上に磁石２０３を露出した状態で保持する有底の穴が複数形成されている。また、テーブル２０１は、前記円板体の底面（図示下面）の中心部から図示下方に向かって棒状に延びた軸体２０１ａが設けられており、この軸体２０１ａにカップリング２０２を介して電動モータ２０４の出力軸が接続されている。 As shown in FIG. 5, the table 201 is a part for holding a plurality of magnets 203 and is configured by a circular plate-like body (hereinafter also referred to as “disk body”) in a plan view. More specifically, the table 201 is formed with a plurality of bottomed holes for holding the magnet 203 in an exposed state on the plate surface (the upper surface in the drawing) of the disk body. Further, the table 201 is provided with a shaft body 201 a extending in a rod shape from the center of the bottom surface (the lower surface in the drawing) of the disk body toward the lower side in the drawing, and the shaft body 201 a is electrically driven through a coupling 202. The output shaft of the motor 204 is connected.
　このテーブル２０１は、常磁性体（例えば、アルミニウム、マンガン、白金またはガラスなど）または反磁性体（例えば、銅、金、銀、亜鉛、鉛、ガラスまたは木材など）で構成されている。本実施形態においては、テーブル２０１は、アルミニウム製の円板体で構成されている。なお、図５においては、後述する磁石２０３およびワーク支持体２２１をそれぞれ二点鎖線で示している。 The table 201 is made of a paramagnetic material (for example, aluminum, manganese, platinum, or glass) or a diamagnetic material (for example, copper, gold, silver, zinc, lead, glass, or wood). In the present embodiment, the table 201 is made of an aluminum disk. In FIG. 5, a magnet 203 and a work support 221 to be described later are indicated by two-dot chain lines.
　磁石２０３は、被加熱対象物１００に誘導電流を生じさせるための部品であり、円柱状に形成されている。この磁石２０３は、テーブル２０１の板面に複数設けられている。この場合、各磁石２０３は、テーブル２０１の板面側が互いに同じ磁極（本実施形態においては、Ｎ極）が露出する向きでテーブル２０１に埋め込まれている。また、各磁石２０３は、テーブル２０１の板面と面一の状態で保持されている。 The magnet 203 is a part for generating an induced current in the object 100 to be heated, and is formed in a cylindrical shape. A plurality of magnets 203 are provided on the plate surface of the table 201. In this case, each magnet 203 is embedded in the table 201 in such a direction that the same magnetic poles (N poles in the present embodiment) are exposed on the plate surface side of the table 201. Each magnet 203 is held in a state of being flush with the plate surface of the table 201.
　また、各磁石２０３は、テーブル２０１の回転駆動中心を中心として同心円状に配置されるとともに各同心円の周方向に沿ってそれぞれ等間隔に配置されている。この場合、磁石２０３は、テーブル２０１の回転駆動中心部分の外側に形成されている。このように、テーブル２０１の回転駆動中心部分に磁石２０３を配置しない理由はこの回転駆動中心部分の回転駆動速度が遅く加熱効率が低いためである。 The magnets 203 are arranged concentrically around the rotational drive center of the table 201 and are arranged at equal intervals along the circumferential direction of the concentric circles. In this case, the magnet 203 is formed outside the rotation drive center portion of the table 201. As described above, the reason why the magnet 203 is not disposed at the rotation drive center portion of the table 201 is that the rotation drive speed of the rotation drive center portion is low and the heating efficiency is low.
　なお、各磁石２０３は、テーブル２０１の板面よりも内側に入り込んだ状態で保持していてもよいし、板面から突出した状態で保持していてもよい。また、各磁石２０３の配置態様は、被加熱対象物１００の加熱の仕様に応じて適宜決定されるものであり、本実施形態に限定されるものでないことは当然である。また、磁石２０３は、本実施形態においては、ネオジム磁石を用いているが、ネオジム磁石以外の磁石、例えば、フェライト、サマリウムコバルトまたはアルニコなどの各種磁石を用いることができる。 In addition, each magnet 203 may be held in a state of entering inside the plate surface of the table 201, or may be held in a state of protruding from the plate surface. Moreover, the arrangement | positioning aspect of each magnet 203 is suitably determined according to the specification of the heating of the to-be-heated target object 100, and is naturally not limited to this embodiment. Moreover, although the neodymium magnet is used for the magnet 203 in this embodiment, magnets other than a neodymium magnet, for example, various magnets, such as a ferrite, samarium cobalt, or alnico, can be used.
　電動モータ２０４は、テーブル２０１を回転駆動するための駆動源であり、後述する制御装置２３０によって作動が制御されるサーボモータによって構成されている。この電動モータ２０４は、アプローチ機構２１０によって支持されている。 The electric motor 204 is a drive source for rotationally driving the table 201, and is configured by a servo motor whose operation is controlled by a control device 230 described later. The electric motor 204 is supported by the approach mechanism 210.
　アプローチ機構２１０は、被加熱対象物１００に対してテーブル２０１を電動モータ２０４とともに一体的に接近または離隔させるための機械装置であり、主として、モータ支持体２１１、リニアガイド２１２、およびガイド支持体２１３および駆動機構２１４をそれぞれ備えて構成されている。 The approach mechanism 210 is a mechanical device for bringing the table 201 together with or away from the object to be heated 100 together with the electric motor 204, and mainly includes a motor support 211, a linear guide 212, and a guide support 213. And a drive mechanism 214.
　モータ支持体２１１は、電動モータ２０４を支持するための部品であり、金属材をＬ字状に形成して構成されている。このモータ支持体２１１は、リニアガイド２１２を介してガイド支持体２１３に連結された状態で駆動機構２１４に支持されている。 The motor support 211 is a part for supporting the electric motor 204, and is configured by forming a metal material in an L shape. The motor support 211 is supported by the drive mechanism 214 while being connected to the guide support 213 via the linear guide 212.
　リニアガイド２１２は、テーブル２０１および電動モータ２０４を被加熱対象物１００に対して接近または離隔する方向に案内するための部品であり、ガイド支持体２１３に設けられたレールとモータ支持体２１１に設けられて前記レール上を往復変位するスライダとで構成されている。ガイド支持体２１３は、リニアガイド２１２を構成するレールを支持するための部品であり、金属材をＬ字状に形成して構成されている。この場合、ガイド支持体２１３は、前記レールをテーブル２０１および電動モータ２０４の案内方向に沿って支持するように同案内方向に沿って延びように形成されている。このガイド支持体２１３は、外側支持体２２０に支持されている。 The linear guide 212 is a component for guiding the table 201 and the electric motor 204 in a direction in which the table 201 and the electric motor 204 are approached or separated from the object to be heated 100, and is provided on the rail provided on the guide support 213 and the motor support 211. And a slider that reciprocally displaces on the rail. The guide support body 213 is a part for supporting the rails constituting the linear guide 212, and is configured by forming a metal material in an L shape. In this case, the guide support 213 is formed to extend along the guide direction so as to support the rail along the guide direction of the table 201 and the electric motor 204. The guide support 213 is supported by the outer support 220.
　駆動機構２１４は、テーブル２０１および電動モータ２０４を被加熱対象物１００に対して接近または離隔する方向に変位させるための駆動源を備えた機械装置である。この駆動機構２１４は、制御装置２３０によって作動制御される図示しない電動モータ（例えば、ＡＣサーボモータ）、この電動モータの回転駆動力を図示上下方向に変換するジャッキおよびこのジャッキを外側支持体２２０上で支持する支持台をそれぞれ有して構成されている。 The drive mechanism 214 is a mechanical device that includes a drive source for displacing the table 201 and the electric motor 204 in a direction in which the table 201 and the electric motor 204 approach or separate from the object to be heated 100. The drive mechanism 214 includes an electric motor (not shown) (for example, an AC servo motor) whose operation is controlled by the control device 230, a jack that converts the rotational driving force of the electric motor in the vertical direction shown in the figure, and the jack on the outer support 220. It has the support stand which supports by each, and is comprised.
　外側支持体２２０は、アプローチ機構２１０およびワーク支持体２２１を支持するための部品であり、金属製の棒状体を箱状に組んで構成されている。この外側支持体２２０は、図示上端部にテーブル２０１の軸体２０１ａが貫通する貫通孔が形成された板状体からなる天板が取り付けられており、この天板上にワーク支持体２２１が設けられている。 The outer support body 220 is a part for supporting the approach mechanism 210 and the work support body 221, and is configured by assembling metal rods in a box shape. The outer support 220 is provided with a top plate made of a plate-like body in which a through-hole through which the shaft body 201a of the table 201 passes is formed at the upper end in the figure, and a work support 221 is provided on the top plate. It has been.
　ワーク支持体２２１は、テーブル２０１上にて被加熱対象物１００を支持するための部品であり、被加熱対象物１００がテーブル２０１の板面上に架けられるようにテーブル２０１の外側の外側支持体２２０上にそれぞれ設けられている。この場合、ワーク支持体２２１は、テーブル２０１の板面上における回転駆動中心部分に対して径方向外側にオフセットした位置で被加熱対象物１００を支持する位置に設けられている。このワーク支持体２２１は、平面部１０１を下方に向けた状態で被加熱対象物１００の両端部を下方から支持するように同両端部がそれぞれ上方から嵌り込むＶ字状に形成されている。 The workpiece support 221 is a part for supporting the object to be heated 100 on the table 201, and the outer support on the outer side of the table 201 so that the object to be heated 100 is laid on the plate surface of the table 201. 220 is provided on each. In this case, the work support 221 is provided at a position that supports the object to be heated 100 at a position that is offset radially outward with respect to the rotational drive center portion on the plate surface of the table 201. The workpiece support 221 is formed in a V shape in which both end portions are fitted from above so as to support both ends of the object 100 to be heated from below with the plane portion 101 facing downward.
　このワーク支持体２２１には、温度検出器２２２が設けられている。温度検出器２２２は、被加熱対象物１００の温度を検出して制御装置２３０に出力する。 The work support 221 is provided with a temperature detector 222. The temperature detector 222 detects the temperature of the object to be heated 100 and outputs it to the control device 230.
　制御装置２３０は、ＣＰＵ、ＲＯＭ、ＲＡＭなどからなるマイクロコンピュータによって構成されており、電磁誘導加熱装置２００の全体の作動を総合的に制御するとともに、記憶装置に予め記憶された図示しない加熱処理プログラムを実行することにより被加熱対象物１００の加熱処理を行う。具体的には、制御装置２３０は、電動モータ２０４の作動を制御してテーブル２０１を回転駆動させるとともに、アプローチ機構２１０の作動を制御してテーブル２０１の図示上下方向の位置を制御する。 The control device 230 is configured by a microcomputer including a CPU, a ROM, a RAM, and the like. The control device 230 comprehensively controls the entire operation of the electromagnetic induction heating device 200, and a heating processing program (not shown) stored in advance in the storage device. Is performed to heat the object 100 to be heated. Specifically, the control device 230 controls the operation of the electric motor 204 to rotationally drive the table 201 and also controls the operation of the approach mechanism 210 to control the vertical position of the table 201 in the figure.
　この制御装置２３０には、作業者からの指示を受け付けて制御装置２３０に入力するスイッチ群からなる入力装置および制御装置２３０の作動状況を表示する表示ランプおよび液晶表示装置をそれぞれ備えた操作盤２３１を備えている。なお、制御装置２３０は、外部電源か電力を受けて電力を必要とする電動モータ２０４およびアプローチ機構２１０などの各部に供給する電源部を備えているが本発明に直接関わらないため、その説明は省略する。また、制御装置２３０は、金属製の箱体内に収容されて外側支持体２２０の外側面に取り付けられていてもよいが、有線を介して外側支持体２２０から離れた位置に設けられていてもよい。 The control device 230 includes an input device composed of a switch group that receives an instruction from an operator and inputs the command to the control device 230, an operation lamp 231 provided with a display lamp that displays an operation status of the control device 230, and a liquid crystal display device. It has. Although the control device 230 includes a power supply unit that receives power from an external power supply and supplies power to each unit such as the electric motor 204 and the approach mechanism 210, the control device 230 is not directly related to the present invention. Omitted. The control device 230 may be housed in a metal box and attached to the outer surface of the outer support 220, but may be provided at a position away from the outer support 220 via a wire. Good.
（被加熱対象物１００の作動）
　次に、上記のように構成した被加熱対象物１００の作動について説明する。本作動説明においては、図６に示すように、アルミホイールまたはアルミサッシなどのアルミニウム製の製品を製造する過程において、これらの原料となる被加熱対象物１００を溶解炉にて溶融する前工程で被加熱対象物１００を４００～５００℃に加熱にして軟化させる予備加熱作業について説明する。 (Operation of heated object 100)
Next, the operation of the object to be heated 100 configured as described above will be described. In the description of this operation, as shown in FIG. 6, in the process of manufacturing an aluminum product such as an aluminum wheel or an aluminum sash, it is a pre-process for melting the object 100 to be heated as a raw material in a melting furnace. A preheating operation for softening the object 100 to be heated by heating to 400 to 500 ° C. will be described.
　まず、作業者は、電磁誘導加熱装置２００の電源をＯＮにする。この場合、制御装置２３０は、図示しない制御プログラムを実行してアプローチ機構２１０の作動を制御してテーブル２０１を下降させて被加熱対象物１００から最も離隔した位置に位置決めする。 First, the worker turns on the electromagnetic induction heating device 200. In this case, the control device 230 executes a control program (not shown) to control the operation of the approach mechanism 210 to lower the table 201 and position it at a position farthest from the object 100 to be heated.
　次に、作業者は、被加熱対象物１００を電磁誘導加熱装置２００上にセットするワーク配置工程を行う。具体的には、作業者は、電磁誘導加熱装置２００におけるワーク支持体２２１上に被加熱対象物１００を載置する。より具体的には、作業者は、被加熱対象物１００における平面部１０１がテーブル２０１に面する向きで被加熱対象物１００の両端部をそれぞれワーク支持体２２１上に載置する。この場合、ワーク支持体２２１は、上方に向かってＶ字状に開口した２つの傾斜面で構成されているため、被加熱対象物１００の傾斜面からなる側面１０２と嵌合して安定的に被加熱対象物１００を支持することができる。なお、被加熱対象物１００のセット作業は、作業者が直接手作業で行ってもよいし被加熱対象物１００を把持してワーク支持体２２１上に載置するロボットアームなどの機械装置を用いてもよい。 Next, the worker performs a work placement process for setting the object to be heated 100 on the electromagnetic induction heating device 200. Specifically, the worker places the object to be heated 100 on the work support 221 in the electromagnetic induction heating device 200. More specifically, the operator places both end portions of the object to be heated 100 on the work support 221 so that the flat portion 101 of the object to be heated 100 faces the table 201. In this case, since the workpiece support 221 is composed of two inclined surfaces that open upward in a V shape, the workpiece support 221 fits stably with the side surface 102 formed of the inclined surface of the object to be heated 100. The object 100 to be heated can be supported. The set operation of the object to be heated 100 may be performed manually by an operator, or a mechanical device such as a robot arm that holds the object to be heated 100 and places it on the work support 221 is used. May be.
　次いで、作業者は、被加熱対象物１００に対して磁石２０３を位置決めする。具体的には、作業者は、操作盤２３１を操作してアプローチ機構２１０を作動させることによってテーブル２０１の板面を被加熱対象物１００の平面部１０１に接触しない範囲で最接近させた位置に位置決めする。この場合、電磁誘導加熱装置２００は、被加熱対象物１００における平面部１０１が対向配置しているため、両者の間隔を互いに接触する直前の位置まで接近させた位置に位置決めすることができる。 Next, the operator positions the magnet 203 with respect to the object 100 to be heated. Specifically, the operator operates the operation panel 231 to operate the approach mechanism 210 so that the plate surface of the table 201 is brought closest to the flat surface portion 101 of the object 100 to be heated. Position it. In this case, the electromagnetic induction heating device 200 can be positioned at a position close to the position immediately before the two are in contact with each other because the planar portion 101 of the object to be heated 100 is disposed oppositely.
　次に、作業者は、被加熱対象物１００を加熱する。具体的には、作業者は、操作盤２３１を操作して制御装置２３０に加熱処理プログラムの実行を指示する。この指示に応答して制御装置２３０は、電動モータ２０４を作動させることによってテーブル２０１を回転駆動させる。これにより、被加熱対象物１００は、内部に生じた誘導電流によって急速に加熱される。 Next, the worker heats the object 100 to be heated. Specifically, the operator operates the operation panel 231 to instruct the control device 230 to execute the heat treatment program. In response to this instruction, the control device 230 rotates the table 201 by operating the electric motor 204. Thereby, the to-be-heated target object 100 is rapidly heated by the induced current produced inside.
　ここで、本発明者らが行なった被加熱対象物１００の加熱実験の結果について説明する。本発明者らは、図７および図８にそれぞれ示すように、被加熱対象物１００と同様に構成、すなわち、上底側の面に平面部１０１が形成されるとともに底面１０３に平面部１０１を形成することなく中央部が凹状に凹んだ形状の被加熱対象物１１０と、被加熱対象物１００における底面１０３にも平面部１０１（平面度１ｍｍ以下）を形成した被加熱対象物１２０とをそれぞれ複数組みずつ用意した。これらの被加熱対象物１１０および被加熱対象物１２０は、それぞれ５ｋｇである。そして、作業者は、図９に示すように、これらの被加熱対象物１１０および被加熱対象物１２０について、それぞれ各底面１０３をテーブル２０１に対向配置して互いに同じ条件で加熱した場合における加熱温度と加熱時間との関係を調べた。 Here, the result of the heating experiment of the object 100 to be heated performed by the present inventors will be described. As shown in FIGS. 7 and 8, the inventors have the same configuration as that of the object to be heated 100, that is, the flat surface portion 101 is formed on the upper bottom surface and the flat surface portion 101 is formed on the bottom surface 103. A heated object 110 having a shape in which the central portion is recessed without being formed, and a heated object 120 in which a flat surface portion 101 (flatness of 1 mm or less) is formed on the bottom surface 103 of the heated object 100, respectively. Several sets were prepared. Each of the object to be heated 110 and the object to be heated 120 is 5 kg. Then, as shown in FIG. 9, the worker heats the object to be heated 110 and the object to be heated 120 when each bottom surface 103 is disposed opposite the table 201 and heated under the same conditions. And the relationship between the heating time and the heating time.
　図９に示すグラフにおいて、横軸はテーブル２０１の回転駆動を開始してからの時間であり、縦軸は被加熱対象物１００の温度である。図９に示すように、本発明に係る平面部１０１を磁石２０３に対向配置した被加熱対象物１２０の方が、本発明に係る平面部１０１を磁石２０３とは反対側に配置して底面１０３を対向配置した被加熱対象物１１０に比べて早期に高温に加熱することができる。具体的には、被加熱対象物１２０は、テーブル２０１の回転駆動を開始してから略１４１秒で４００℃に達するとともに、略２２１秒で５００℃に加熱される。一方、被加熱対象物１１０は、テーブル２０１の回転駆動を開始してから略４８１秒で４００℃に達するとともに、６０１秒経過しても５００℃に達することはなかった。 In the graph shown in FIG. 9, the horizontal axis is the time since the rotation of the table 201 is started, and the vertical axis is the temperature of the object 100 to be heated. As shown in FIG. 9, the heated object 120 in which the flat surface portion 101 according to the present invention is disposed to face the magnet 203 is arranged so that the flat surface portion 101 according to the present invention is disposed on the opposite side of the magnet 203. Can be heated to a higher temperature earlier than the object 110 to be heated. Specifically, the object 120 to be heated reaches 400 ° C. in approximately 141 seconds after starting to rotate the table 201 and is heated to 500 ° C. in approximately 221 seconds. On the other hand, the object to be heated 110 reached 400 ° C. in about 481 seconds after starting to rotate the table 201, and did not reach 500 ° C. even after 601 seconds.
　次に、作業者は、被加熱対象物１００が所定の温度に達した場合には、被加熱対象物１００の加熱を停止して電磁誘導加熱装置２００から取り出す。具体的には、作業者は、操作盤２３１を操作して制御装置２３０に加熱処理プログラムの実行停止を指示する。この指示に応答して制御装置２３０は、電動モータ２０４の作動を停止させることによってテーブル２０１の回転駆動を停止させる。これにより、作業者は、ワーク支持体２２１上の被加熱対象物１００を取り出すことができる。 Next, when the object 100 to be heated reaches a predetermined temperature, the worker stops heating the object 100 to be heated and removes it from the electromagnetic induction heating device 200. Specifically, the operator operates the operation panel 231 to instruct the control device 230 to stop executing the heat treatment program. In response to this instruction, the control device 230 stops the rotation drive of the table 201 by stopping the operation of the electric motor 204. Thereby, the worker can take out the object 100 to be heated on the workpiece support 221.
　この被加熱対象物１００の取出し作業において、作業者は、操作盤２３１に表示される被加熱対象物１００の温度を確認して被加熱対象物１００が所定の温度に達したことを確認することができる。また、作業者は、被加熱対象物１００が所定の温度に達するまでの時間を予め実験的に取得しておき、この所定時間の経過の有無によって被加熱対象物１００が所定の温度に達したことを把握することもできる。また、制御装置２３０は、前記所定温度に達したとき、または前記所定の時間が経過した場合には、自動的に電動モータ２０４の作動を停止させることもできる。なお、被加熱対象物１００の取出し作業は、作業者が直接手作業で行ってもよいし被加熱対象物１００を把持してワーク支持体２２１上から運び出すロボットアームなどの機械装置を用いてもよい。 In the operation of taking out the object 100 to be heated, the operator confirms the temperature of the object 100 to be heated displayed on the operation panel 231 and confirms that the object 100 to be heated has reached a predetermined temperature. Can do. In addition, the operator experimentally obtains a time until the object 100 to be heated reaches a predetermined temperature in advance, and the object 100 to be heated has reached a predetermined temperature depending on whether or not the predetermined time has elapsed. You can also grasp that. In addition, the control device 230 can automatically stop the operation of the electric motor 204 when the predetermined temperature is reached or when the predetermined time has elapsed. Note that the work to take out the object 100 to be heated may be performed manually by an operator, or a mechanical device such as a robot arm that holds the object 100 to be heated and carries it out from the work support 221 may be used. Good.
　そして、作業者は、電磁誘導加熱装置２００から取り出した被加熱対象物１００を溶解炉に投入した後、溶融した被加熱対象物１００を鋳型に流し込んでアルミホイールなどの成形品を成形する。この電磁誘導加熱装置２００から取り出した被加熱対象物１００の加工過程については本発明に直接関わらないため、その説明は省略する。 Then, the worker puts the object 100 to be heated taken out from the electromagnetic induction heating device 200 into the melting furnace, and then pours the object 100 to be heated into a mold to form a molded product such as an aluminum wheel. Since the process of processing the object 100 to be heated taken out from the electromagnetic induction heating apparatus 200 is not directly related to the present invention, the description thereof is omitted.
　次に、作業者は、新たな被加熱対象物１００を加熱処理する場合には前記と同様にして新たな被加熱対象物１００をワーク支持体２２１上に配置して加熱処理を実行する。一方、作業者は、この予備加熱工程を終了する場合には電磁誘導加熱装置２００の電源をＯＦＦにして作業を終了する。 Next, when heat-treating a new object to be heated 100, the worker places the new object to be heated 100 on the work support 221 and executes the heat treatment in the same manner as described above. On the other hand, when ending this preheating process, the operator turns off the electromagnetic induction heating device 200 and ends the work.
　上記作動説明からも理解できるように、上記実施形態によれば、電磁誘導加熱装置２００に用いられる被加熱対象物１００は、テーブル２０１の各磁石２０３に対向する部分が同各磁石２０３の回転面に対して平行な平面でかつ平面度が５ｍｍ以下である平面部１０１が形成されているため、被加熱対象物１００の加熱時間を短縮化することができるとともに加熱時間を均一化することができる。 As can be understood from the above description of operation, according to the above embodiment, the object to be heated 100 used in the electromagnetic induction heating device 200 is such that the portion of the table 201 that faces each magnet 203 is the rotation surface of each magnet 203. Since the flat portion 101 having a plane parallel to the surface and having a flatness of 5 mm or less is formed, the heating time of the object to be heated 100 can be shortened and the heating time can be made uniform. .
　さらに、本発明の実施にあたっては、上記実施形態に限定されるものではなく、本発明の目的を逸脱しない限りにおいて種々の変更が可能である。なお、下記に示す各変形例においては、上記実施形態における被加熱対象物１００と同様の構成部分には被加熱対象物１００に付した符号に対応する符号を付して、その説明は省略する。 Furthermore, the implementation of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the object of the present invention. In addition, in each modification shown below, the code | symbol corresponding to the code | symbol attached | subjected to the to-be-heated target object 100 is attached | subjected to the component similar to the to-be-heated target object 100 in the said embodiment, and the description is abbreviate | omitted. .
　例えば、上記実施形態においては、被加熱対象物１００は、平面部１０１を断面形状が台形状に形成された被加熱対象物１００における上底となる側の面（図１における上面）に形成した。しかし、平面部１０１は、被加熱対象物１００におけるテーブル２０１に設けられた磁石２０３に対向配置可能な面に形成されていればよい。したがって、平面部１０１は、被加熱対象物１００における側面１０２および底面１０３にそれぞれ形成することもできる。 For example, in the above-described embodiment, the object to be heated 100 is formed by forming the flat portion 101 on the surface that is the upper bottom of the object to be heated 100 having a trapezoidal cross section (the upper surface in FIG. 1). . However, the flat part 101 should just be formed in the surface which can be opposingly arranged to the magnet 203 provided in the table 201 in the to-be-heated target object 100. FIG. Therefore, the plane portion 101 can be formed on each of the side surface 102 and the bottom surface 103 of the object to be heated 100.
　また、上記実施形態においては、被加熱対象物１００は、平面部１０１を断面形状が台形状に形成された被加熱対象物１００における上底となる側の面（図１における上面）の全面に形成した。しかし、平面部１０１は、被加熱対象物１００におけるテーブル２０１に設けられた磁石２０３に対向配置可能な面に形成されていればよい。この場合、テーブル２０１の回転駆動の中心部分は、回転速度が径方向外側に比べて遅い。このため、被加熱対象物１００は、テーブル２０１の回転駆動の中心部分に対向配置される部分の加熱効果が相対的に低い。 Moreover, in the said embodiment, the to-be-heated target object 100 is the whole surface of the surface (upper surface in FIG. 1) used as the upper bottom in the to-be-heated target object 100 in which the plane part 101 formed the trapezoidal shape in cross section. Formed. However, the flat part 101 should just be formed in the surface which can be opposingly arranged to the magnet 203 provided in the table 201 in the to-be-heated target object 100. FIG. In this case, the rotational speed of the central portion of the rotational drive of the table 201 is slower than the radially outer side. For this reason, the to-be-heated target object 100 has a relatively low heating effect at a portion disposed opposite to the central portion of the table 201 for rotational driving.
　したがって、被加熱対象物１００は、図１０に示すように、テーブル２０１の回転駆動の中心部分に対向配置される部分については平面部１０１を形成せず平面部１０１の平面度よりも低い平面度のラフ部１０４を形成しておき、このラフ部１０４の外側に平面部１０１を形成することもできる。これによれば、被加熱対象物１００は、平面部１０１の加工負担を軽減できるとともに、ラフ部１０４に被加熱対象物１００のロット番号または製造者名などの刻印のスペースとして使用することができる。なお、図９においては、ラフ部１０４と平面部１０１との相違に明確にするために、ラフ部１０４の外側に形成される平面部１０１をハッチングで示している。 Therefore, as shown in FIG. 10, the object 100 to be heated does not form the flat portion 101 for the portion disposed opposite to the central portion of the rotational drive of the table 201 and has a flatness lower than the flatness of the flat portion 101. The rough portion 104 can be formed in advance, and the flat portion 101 can be formed outside the rough portion 104. According to this, the object 100 to be heated can reduce the processing burden on the flat surface portion 101 and can be used as a space for marking the lot number or manufacturer name of the object 100 to be heated on the rough portion 104. . In FIG. 9, the flat portion 101 formed outside the rough portion 104 is indicated by hatching in order to clarify the difference between the rough portion 104 and the flat portion 101.
　また、上記実施形態においては、被加熱対象物１００は、断面形状が台形形状の台形錐形状で構成した。しかし、被加熱対象物１００は、被加熱対象物１００におけるテーブル２０１に設けられた磁石２０３に対向配置可能な形状に形成されていればよい。したがって、被加熱対象物１００は、断面形状が方形または三角形などの多角形状の棒状体のほか、平板状の板状体で構成することができる。 Further, in the above embodiment, the object to be heated 100 is formed in a trapezoidal cone shape having a trapezoidal cross section. However, the object to be heated 100 only needs to be formed in a shape that can be disposed opposite to the magnet 203 provided on the table 201 in the object to be heated 100. Therefore, the to-be-heated object 100 can be constituted by a flat plate-like body in addition to a rod-like body having a cross-sectional shape of a square or a polygon such as a triangle.
　この場合、被加熱対象物１００は、外表面における少なくとも一部に平面部１０１が形成されているとよい。しかし、本発明は、被加熱対象物１００に平面部１０１が形成されていない場合であっても、被加熱対象物１００の外表面のうちの最も平面度が高い部分を平面部１０１としてテーブル２０１の磁石２０３に対向配置することで被加熱対象物１００の加熱時間の短縮化および加熱時間の均一化について改善することができる。 In this case, the object to be heated 100 may have a flat surface portion 101 formed on at least a part of the outer surface. However, according to the present invention, even if the planar object 101 is not formed on the object 100 to be heated, the table 201 is defined as a part having the highest flatness in the outer surface of the object 100 to be heated. By arranging it opposite to the magnet 203, the heating time of the object 100 to be heated can be shortened and the heating time can be made uniform.
　また、被加熱対象物１００に平面部１０１が形成されていない場合においては、図１１に示すように、電磁誘導加熱装置２００による被加熱対象物１００の加熱加工の前に、被加熱対象物１００の外表面における少なくとも一部に平面部１０１を形成する平面部形成工程を行うことができる。この場合、平面部形成工程は、平面部１０１が形成されていない被加熱対象物１００の外表面における少なくとも一部に対して切削加工、鍛造加工または転造加工などの各種機械加工を施して平面部１０１を形成するとよい。 In addition, when the planar portion 101 is not formed on the object 100 to be heated, the object 100 to be heated is heated before the object 100 is heated by the electromagnetic induction heating device 200 as shown in FIG. A plane portion forming step of forming the plane portion 101 on at least a part of the outer surface of the substrate can be performed. In this case, the flat surface portion forming step is performed by performing various kinds of machining such as cutting, forging or rolling on at least a part of the outer surface of the object 100 to be heated on which the flat surface 101 is not formed. The portion 101 may be formed.
　また、上記実施形態においては、被加熱対象物１００は、アルミホイールまたはアルミサッシなどのアルミニウム製の製品の原料としての鋳塊で構成した。しかし、被加熱対象物１００は、アルミホイールまたはアルミサッシ以外の各種製品（例えば、アルミニウム製のシリンダブロックなど）の原料としての鋳塊であってもよいことは当然である。また、被加熱対象物１００は、アルミニウム材以外の常磁性体（例えば、アルミニウム、マンガン、白金またはガラスなど）または反磁性体（例えば、銅、金、銀、亜鉛、鉛、ガラスまたは木材など）の材料で構成することもできる。さらに、被加熱対象物１００は、アルミホイールまたはアルミサッシなどの完成品に至る前で原材料に対して加工が施された半製品であってもよい。この場合、半製品における磁石２０３に対向配置する部分の平面度を５ｍｍ以下に形成するとよい。 In the above embodiment, the object to be heated 100 is composed of an ingot as a raw material for an aluminum product such as an aluminum wheel or an aluminum sash. However, it is natural that the object to be heated 100 may be an ingot as a raw material of various products other than an aluminum wheel or an aluminum sash (for example, an aluminum cylinder block). Further, the object to be heated 100 is a paramagnetic material other than an aluminum material (for example, aluminum, manganese, platinum, or glass) or a diamagnetic material (for example, copper, gold, silver, zinc, lead, glass, or wood). It can also be comprised with the material of. Further, the object to be heated 100 may be a semi-finished product obtained by processing a raw material before reaching a finished product such as an aluminum wheel or an aluminum sash. In this case, the flatness of the portion of the semi-finished product that faces the magnet 203 is preferably 5 mm or less.
　また、上記実施形態においては、テーブル２０１は、円板状に形成した。しかし、テーブル２０１は、平面視で円形（楕円を含む）以外の形状、例えば、方形、三角形または六角形などの多角形状に形成することもできる。この場合、平面部１０１は、テーブル２０１または磁石２０３が回転駆動する回転面に対して平行な平面で平面度が５ｍｍ以下に形成されていればよい。 In the above embodiment, the table 201 is formed in a disc shape. However, the table 201 may be formed in a shape other than a circle (including an ellipse) in a plan view, for example, a polygonal shape such as a square, a triangle, or a hexagon. In this case, the flat part 101 should just be formed in the plane parallel to the rotating surface which the table 201 or the magnet 203 rotationally drives, and flatness is 5 mm or less.
　また、上記実施形態においては、電磁誘導加熱装置２００は、被加熱対象物１００に対してテーブル２０１が回転駆動するように構成した。すなわち、電動モータ２０４が、本発明に係るテーブル駆動手段に相当する。しかし、電磁誘導加熱装置２００は、被加熱対象物１００に対してテーブル２０１が相対的に回転駆動するように構成されていればよい。したがって、電磁誘導加熱装置２００は、テーブル２０１に対して被加熱対象物１００が回転駆動するようにテーブル駆動手段を設けて構成することもできる。 In the above embodiment, the electromagnetic induction heating device 200 is configured such that the table 201 is rotationally driven with respect to the object 100 to be heated. That is, the electric motor 204 corresponds to the table driving means according to the present invention. However, the electromagnetic induction heating device 200 only needs to be configured such that the table 201 rotates relative to the object 100 to be heated. Therefore, the electromagnetic induction heating device 200 can also be configured by providing table driving means so that the object to be heated 100 is rotationally driven with respect to the table 201.
　また、上記実施形態においては、平面部１０１における平面度を５ｍｍ以下とした。しかし、この平面度は、隙間量が小さいほど平面度が高くなり、被加熱対象物１００の加熱時間の短縮化および加熱時間の均一化を向上させることができる。したがって、平面部１０１における平面度は、好ましくは３ｍｍ以下、より好ましくは１ｍｍ以下がよい。 In the above embodiment, the flatness of the flat portion 101 is 5 mm or less. However, the flatness increases as the gap amount decreases, and the heating time of the object 100 to be heated can be shortened and the heating time can be made uniform. Therefore, the flatness in the flat portion 101 is preferably 3 mm or less, more preferably 1 mm or less.
　また、上記実施形態においては、ワーク支持体２２１は、台形錐状に形成された被加熱対象物１００が上方から嵌り込む断面がＶ字状に形成した。しかし、ワーク支持体は、被加熱対象物１００を着脱自在に支持するように構成されていればよい。したがって、ワーク支持体２２１は、被加熱対象物１００が載置された状態で更に上方または側方から被加熱対象物を押えるクランプ機構を備えていてもよい。また、ワーク支持体２２１は、ベルトコンベアのように、被加熱対象物１００がテーブル２０１上を移動する状態で支持するように構成することもできる。 In the above embodiment, the workpiece support 221 has a V-shaped cross section into which the heated object 100 formed in a trapezoidal cone shape is fitted from above. However, the workpiece support body should just be comprised so that the to-be-heated target object 100 may be detachably supported. Therefore, the workpiece support 221 may further include a clamp mechanism that presses the object to be heated from above or from the side while the object 100 to be heated is placed. Further, the workpiece support 221 can be configured to support the object to be heated 100 while moving on the table 201 like a belt conveyor.
１００…被加熱対象物、１０１…平面部、１０２…側面、１０３…底面、１０４…ラフ部、
１１０…被加熱対象物、１２０…被加熱対象物、
２００…電磁誘導加熱装置、２０１…テーブル、２０１ａ…軸体、２０２…カップリング、２０３…磁石、２０４…電動モータ、
２１０…アプローチ機構、２１１…モータ支持体、２１２…リニアガイド、２１３…ガイド支持体、２１４…駆動機構、
２２０…外側支持体、２２１…ワーク支持体、２２２…温度検出器、
２３０…制御装置、２３１…操作盤。 DESCRIPTION OF SYMBOLS 100 ... Object to be heated, 101 ... Plane part, 102 ... Side face, 103 ... Bottom face, 104 ... Rough part,
110 ... object to be heated, 120 ... object to be heated,
DESCRIPTION OF SYMBOLS 200 ... Electromagnetic induction heating apparatus, 201 ... Table, 201a ... Shaft body, 202 ... Coupling, 203 ... Magnet, 204 ... Electric motor,
210 ... approach mechanism, 211 ... motor support, 212 ... linear guide, 213 ... guide support, 214 ... drive mechanism,
220 ... outer support, 221 ... work support, 222 ... temperature detector,
230: Control device, 231: Operation panel.

Claims (8)

  1. 　完成品に至るまでの工程において電磁誘導加熱装置による加熱によって軟化される原料または半製品からなる被加熱対象物であって、
    　前記電磁誘導加熱装置は、
    　複数の磁石の各磁極が同じ向きで平面的に配置されたテーブルと、
    　前記被加熱対象物と前記テーブルとを相対的に回転駆動するテーブル駆動手段と、
    　前記被加熱対象物を前記テーブルの前記各磁石に対向した状態で支持するワーク支持体とを有して、前記各磁石に対向配置した前記被加熱対象物と前記テーブルとを相対的に回転変位させることによって前記被加熱対象物に誘導電流を生じさせて加熱するものであり、
    　前記被加熱対象物は、
    　前記テーブルの前記各磁石に対向する部分が同各磁石の回転面に対して平行な平面でかつ平面度が５ｍｍ以下である平面部が形成されていることを特徴とする電磁誘導加熱装置用の被加熱対象物。     An object to be heated consisting of a raw material or a semi-finished product that is softened by heating with an electromagnetic induction heating device in a process leading to a finished product,
    The electromagnetic induction heating device is
    A table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction;
    Table driving means for relatively rotating and driving the object to be heated and the table;
    A workpiece support that supports the object to be heated in a state of being opposed to the magnets of the table, and the object to be heated and the table disposed to face each of the magnets are relatively rotationally displaced. By causing an induction current to be generated in the object to be heated,
    The heated object is
    A part for the electromagnetic induction heating device, wherein a portion of the table facing the magnet is a plane parallel to the rotation surface of the magnet and a flatness of 5 mm or less. Object to be heated.
  2. 　請求項１に記載した電磁誘導加熱装置用の被加熱対象物において、
    　前記被加熱対象物は、
    　断面形状が台形形状で棒状に延びて形成されており、
    　前記平面部は、
    　前記台形形状の前記被加熱対象物における前記台形形状の上底側の面に形成されていることを特徴とする電磁誘導加熱装置用の被加熱対象物。     In the object to be heated for the electromagnetic induction heating device according to claim 1,
    The heated object is
    The cross-sectional shape is a trapezoidal shape that extends in a rod shape,
    The plane portion is
    An object to be heated for an electromagnetic induction heating device, wherein the object to be heated is formed on an upper bottom surface of the trapezoidal shape of the object to be heated having the trapezoidal shape.
  3. 　請求項１または請求項２に記載した電磁誘導加熱装置用の被加熱対象物において、
    　前記被加熱対象物は、
    　前記テーブルの回転円の径方向に延びる板状または棒状に形成されているとともに、同被加熱対象物における前記テーブルが対向配置される部分であって前記相対的に回転する前記テーブルの中心部分に前記平面部が形成されていないラフ部が形成されており、
    　前記平面部は、
    　前記ラフ部の外側に形成されていることを特徴とする電磁誘導加熱装置用の被加熱対象物。     In the object to be heated for the electromagnetic induction heating device according to claim 1 or 2,
    The heated object is
    The table is formed in a plate shape or a rod shape extending in the radial direction of the rotation circle of the table, and is a portion where the table in the object to be heated is disposed opposite to the center portion of the table that rotates relatively. A rough portion where the flat portion is not formed is formed,
    The plane portion is
    An object to be heated for an electromagnetic induction heating device, which is formed outside the rough portion.
  4. 　複数の磁石の各磁極が同じ向きで平面的に配置されたテーブルと、
    　板状または棒状の被加熱対象物と前記テーブルとを相対的に回転駆動するテーブル駆動手段と、
    　前記被加熱対象物を前記テーブルの前記各磁石に対向した状態で支持するワーク支持体とを有して、前記各磁石に対向配置した前記被加熱対象物と前記テーブルとを相対的に回転変位させることによって前記被加熱対象物に誘導電流を生じさせて加熱する電磁誘導加熱装置を用いた前記被加熱対象物の加熱方法であって、
    　前記被加熱対象物は、
    　完成品に至るまでの工程において電磁誘導加熱装置による加熱によって軟化される原料または半製品であるとともに、外表面のうちの少なくとも一部に、前記各磁石の回転面に対して平行な平面でかつ平面度が５ｍｍ以下である平面部を有しており、
    　前記被加熱対象物における前記平面部を前記各磁石に対向配置するように同被加熱対象物を前記ワーク支持体に配置するワーク配置工程を含むことを特徴とする被加熱対象物の加熱方法。     A table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction;
    A table driving means for relatively rotating and driving a plate-shaped or rod-shaped object to be heated and the table;
    A workpiece support that supports the object to be heated in a state of being opposed to the magnets of the table, and the object to be heated and the table disposed to face each of the magnets are relatively rotationally displaced. A heating method of the object to be heated using an electromagnetic induction heating device that heats the object to be heated by generating an induction current,
    The heated object is
    It is a raw material or semi-finished product that is softened by heating with an electromagnetic induction heating device in the process up to the finished product, and at least a part of the outer surface is a plane parallel to the rotating surface of each magnet and It has a flat part with a flatness of 5 mm or less,
    A method for heating an object to be heated, comprising: a work arrangement step of arranging the object to be heated on the work support so that the planar portion of the object to be heated is arranged opposite to each magnet.
  5. 　請求項４に記載した被加熱対象物の加熱方法において、
    　前記被加熱対象物は、
    　断面形状が台形形状で棒状に延びて形成されており、
    　前記平面部は、
    　前記台形形状の前記被加熱対象物における前記台形形状の上底側の面に形成されていることを特徴とする被加熱対象物の加熱方法。     In the heating method of the to-be-heated target object described in Claim 4,
    The heated object is
    The cross-sectional shape is a trapezoidal shape that extends in a rod shape,
    The plane portion is
    A heating method for an object to be heated, which is formed on an upper bottom surface of the trapezoidal shape of the object to be heated having a trapezoidal shape.
  6. 　複数の磁石の各磁極が同じ向きで平面的に配置されたテーブルと、
    　板状または棒状の被加熱対象物と前記テーブルとを相対的に回転駆動するテーブル駆動手段と、
    　前記被加熱対象物を前記テーブルの前記各磁石に対向した状態で支持するワーク支持体とを有して、前記各磁石に対向配置した前記被加熱対象物と前記テーブルとを相対的に回転変位させることによって前記被加熱対象物に誘導電流を生じさせて加熱する電磁誘導加熱装置を用いた前記被加熱対象物の加熱方法であって、
    　前記被加熱対象物は、
    　完成品に至るまでの工程において電磁誘導加熱装置による加熱によって軟化される原料または半製品であり、
    　前記被加熱対象物の外表面のうちの少なくとも一部に、前記各磁石の回転面に対して平行な平面でかつ平面度が５ｍｍ以下である平面部を形成する平面部形成工程と、
    　前記被加熱対象物における前記平面部を前記各磁石に対向配置するように同被加熱対象物を前記ワーク支持体に配置するワーク配置工程とを含むことを特徴とする被加熱対象物の加熱方法。     A table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction;
    Table driving means for relatively rotating and driving a plate-shaped or bar-shaped object to be heated and the table;
    A workpiece support that supports the object to be heated in a state of being opposed to the magnets of the table, and the object to be heated and the table disposed to face each of the magnets are relatively rotationally displaced. A heating method of the object to be heated using an electromagnetic induction heating device that heats the object to be heated by generating an induction current,
    The heated object is
    A raw material or semi-finished product that is softened by heating with an electromagnetic induction heating device in the process up to the finished product,
    A plane part forming step of forming a plane part parallel to the rotating surface of each magnet and having a flatness of 5 mm or less on at least a part of the outer surface of the object to be heated;
    And a work placement step of placing the object to be heated on the work support so that the planar portion of the object to be heated is disposed opposite to the magnets. .
  7. 　請求項６に記載した被加熱対象物の加熱方法において、
    　前記被加熱対象物は、
    　断面形状が台形形状で棒状に延びて形成されており、
    　前記平面部形成工程は、
    　前記台形形状の前記被加熱対象物における前記台形形状の上底側の面に前記平面部を形成することを特徴とする被加熱対象物の加熱方法。     In the heating method of the to-be-heated target object described in Claim 6,
    The heated object is
    The cross-sectional shape is a trapezoidal shape that extends in a rod shape,
    The plane portion forming step includes
    The heating method of a heating target object, wherein the flat surface portion is formed on an upper bottom surface of the trapezoidal shape in the trapezoidal heating target object.
  8. 　複数の磁石の各磁極が同じ向きで平面的に配置されたテーブルと、
    　アルミホイールの原料である棒状の被加熱対象物と前記テーブルとを相対的に回転駆動するテーブル駆動手段と、
    　前記被加熱対象物を前記テーブルの前記各磁石に対向した状態で支持するワーク支持体とを有して、前記各磁石に対向配置した前記被加熱対象物と前記テーブルとを相対的に回転変位させることによって前記被加熱対象物に誘導電流を生じさせて加熱により軟化させる電磁誘導加熱装置を用いた前記アルミホイールの製造方法であって、
    　前記被加熱対象物は、
    　外表面のうちの少なくとも一部に、前記各磁石の回転面に対して平行な平面でかつ平面度が５ｍｍ以下である平面部を有しており、
    　前記被加熱対象物における前記平面部を前記各磁石に対向配置するように同被加熱対象物を前記ワーク支持体に配置するワーク配置工程を含むことを特徴とするアルミホイールの製造方法。
          A table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction;
    A table driving means for relatively rotating and driving the rod-shaped object to be heated and the table as a raw material of the aluminum wheel;
    A workpiece support that supports the object to be heated in a state of being opposed to the magnets of the table, and the object to be heated and the table disposed to face each of the magnets are relatively rotationally displaced. A method of manufacturing the aluminum wheel using an electromagnetic induction heating device that generates an induced current in the object to be heated and softens it by heating,
    The heated object is
    At least a part of the outer surface has a plane part parallel to the rotation surface of each magnet and having a flatness of 5 mm or less,
    The manufacturing method of the aluminum wheel characterized by including the workpiece | work arrangement | positioning process which arrange | positions the said to-be-heated target object in the said work support body so that the said plane part in the said to-be-heated target object may be arrange | positioned facing each said magnet.
PCT/JP2019/022603 2018-06-14 2019-06-06 Object to be heated for electromagnetic induction heating device, method for heating object to be heated, and method for manufacturing aluminum foil WO2019240014A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009048049A1 (en) * 2007-10-09 2009-04-16 Tsugumitsu Matsui Electromagnetic induction type heating device, hot-blast generating device, and power generating device
JP2012104223A (en) * 2009-04-04 2012-05-31 Crew Kenkyusho Co Ltd Permanent magnet type eddy current heater
JP2018018604A (en) * 2016-07-25 2018-02-01 Tsk株式会社 Electromagnetic induction heating device and method for manufacturing light alloy wheel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009048049A1 (en) * 2007-10-09 2009-04-16 Tsugumitsu Matsui Electromagnetic induction type heating device, hot-blast generating device, and power generating device
JP2012104223A (en) * 2009-04-04 2012-05-31 Crew Kenkyusho Co Ltd Permanent magnet type eddy current heater
JP2018018604A (en) * 2016-07-25 2018-02-01 Tsk株式会社 Electromagnetic induction heating device and method for manufacturing light alloy wheel

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