JP6515397B1 - Electromagnetic induction heating device - Google Patents

Abstract

To provide an electromagnetic induction heating device capable of cooling a magnet for heating an object to be heated without reducing the heating efficiency of the object to be heated. An electromagnetic induction heating apparatus 100 includes a table 101 holding a plurality of magnets in a state of facing an object to be heated WK. A heat sink 103 is formed on the back surface 101 a of the table 101 opposite to the magnet 105, and the heat sink 103 is covered with a back surface jacket 107. The heat sink 103 is formed in an annular shape which is continuously dropped from the circumference of four concentric circles centered on the rotational drive center of the table 101 downward along the same circumference. The back surface jacket 107 forms a cavity 108 with the back surface 101 a of the table 101, and also includes a gas supplier 110 and a gas discharger 111 for supplying or evacuating air to the cavity 108. [Selected figure] Figure 1

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an electromagnetic induction heating apparatus that generates an induction current in an object to be heated to heat it.

  DESCRIPTION OF RELATED ART Conventionally, the electromagnetic induction heating apparatus which produces and heats an induction current in the to-be-heated target object which consists of conductors is known. For example, in Patent Document 1 below, a magnetic heater device that generates an induction current in a conductive member and heats it by rotationally driving a frame that holds a plurality of magnets alternately with different magnetic poles facing the conductive member. Is disclosed. In this case, Patent Document 1 below discloses that a cooling mechanism for cooling the magnet is provided.

Japanese Patent Publication No. 2004-537147

  However, in Patent Document 1 described above, it is not described what and how the cooling mechanism is provided and where it can be used to cool the magnet, and the magnet can not be substantially cooled. In addition, in an electromagnetic induction heating apparatus that generates an induction current to heat an object to be heated, such as a magnetic heater device, there is a possibility that the heating efficiency of the object to be heated may be reduced by providing the cooling mechanism.

  The present invention has been made to address the above problems, and an object thereof is to provide an electromagnetic induction heating apparatus capable of cooling a magnet for heating an object to be heated without reducing the heating efficiency of the object to be heated. To provide.

In order to achieve the above object, the feature of the present invention is that the work support for supporting the heating target to be heated and the magnetic poles of the plurality of magnets on the heating target supported by the work support are the same. An object to be heated by rotationally displacing a plurality of magnets with respect to the object to be heated, including a table flatly arranged in a direction and a table drive means for rotationally driving the table to the object to be heated An electromagnetic induction heating device that generates inductive current and heats the object, and a gas feeder that sends gas to the back side of the table opposite to the work support, and a cavity formed on the back side of the table However, the back jacket is provided with a back jacket that covers the back as well as the same cavity, and the back jacket is a gas feeder that sends gas to the cavity from the outside of the back jacket, and a cavity communicating with the inside and the outside of the back jacket. The gas is to and an exhaust port leading to the outside of the cavity.

  In this case, as the gas, in addition to air, an inert gas such as nitrogen can be used. In addition to the fan, a compressor can be used as the gas supplier.

According to the feature of the present invention configured as described above, the electromagnetic induction heating device sends the gas to the back side opposite to the workpiece support with respect to the table holding the magnet for heating the object to be heated. Since the gas supply device is provided, the magnet for heating the object to be heated can be cooled without reducing the heating efficiency of the object to be heated. Further, according to the feature of the present invention configured as described above, since the electromagnetic induction heating device includes the back surface jacket provided with the gas supply device and the exhaust port on the back surface side of the table, the temperature environment around the table In particular, it is possible to effectively cool the back surface of the table by preventing the air sent from the object to be heated from the object to be heated to the back surface side of the table and the back surface side of the table from being heated.

  Also, another feature of the present invention is that in the electromagnetic induction heating device, the gas supply device sends the gas toward the back of the table.

  According to another feature of the invention thus configured, the electromagnetic induction heating device delivers gas parallel to the back of the table, as the gas feeder delivers gas towards the back of the table. Thus, the magnet can be cooled efficiently.

  Another feature of the present invention is that, in the electromagnetic induction heating device, the gas feeder sends gas to a portion of the table between the rotary drive center and the outer edge.

  According to another feature of the invention thus configured, the electromagnetic induction heating device allows the gas feeder to send gas to the portion of the table between the rotary drive center and the outer edge, so that the rotary drive central portion of the table That is, the magnet can be cooled more efficiently than when the gas is sent to a portion where the rotational driving speed is relatively low.

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  Also, another feature of the present invention is that, in the electromagnetic induction heating apparatus, the exhaust port is formed at a position where the distance from the rotational drive center of the table is longer than the distance from the rotational drive center of the table of the gas supply machine. It is.

  According to the other feature of the present invention configured as described above, the electromagnetic induction heating device is located at a position where the distance from the center of rotational drive of the table to the exhaust port is greater than the distance from the center of rotational drive of the table of the gas supply machine. Since it is formed, the gas guided to the radial direction outer side of the table can be effectively led to the discharge port and discharged out of the back surface jacket by the rotationally driven table.

  Further, another feature of the present invention is that the electromagnetic induction heating device is provided with a gas discharger for guiding the gas in the cavity to the outside of the cavity at the exhaust port.

  According to another feature of the present invention configured as described above, the electromagnetic induction heating device is provided with a gas discharger for guiding the gas in the cavity to the outside of the cavity at the exhaust port. It is possible to actively discharge and introduce a new gas into the back jacket, and to cool the back of the table effectively.

  In this case, a compressor can be used as the gas discharger in addition to the fan.

  In addition, another feature of the present invention is that in the electromagnetic induction heating device, the back jacket and the table bend in a cavity and the outside of the back jacket in a non-contact manner at portions facing each other at positions close to each other. It has the squeeze part made to make it communicate.

  According to another feature of the present invention thus constructed, the electromagnetic induction heating device comprises a cavity and a back jacket that contactlessly contact each other at opposing portions of the back jacket and table in close proximity to each other. Since the throttling portion for bending and communicating with the outside is provided, it is possible to effectively prevent the leakage of the gas in the hollow portion formed by the back surface jacket on the back surface side of the rotatably driven table.

  Further, another feature of the present invention is that, in the electromagnetic induction heating device, the narrowed portion is such that the opening to the outside of the back surface jacket faces in a direction other than the object to be heated which is disposed opposite to the table.

  According to another feature of the present invention configured as described above, in the electromagnetic induction heating device, the opening to the outside of the back surface jacket in the narrowed portion faces in a direction other than the object to be heated disposed opposite to the table Therefore, the object to be heated can be efficiently heated without inhibiting the heating of the object to be heated. In this case, for example, the radial direction of the table or the back side of the table can be considered as a direction other than the object to be heated in which the opening to the outside of the back surface jacket in the squeezed portion faces the table.

  Further, another feature of the present invention is that the electromagnetic induction heating apparatus further comprises a control device for controlling each operation of the table drive means and the gas supply device, and the control device is adapted to interrupt the rotational drive of the table. After stopping the rotational drive control of the table by the table drive means, the operation control of the gas supply machine is ended.

  According to another feature of the present invention thus configured, the electromagnetic induction heating device is configured to control the rotational drive control of the table by the table drive means when the control device interrupts the rotational drive of the table. In order to complete the operation control, it is possible to prevent the temperature rise of the magnet after the rotation drive of the table is stopped.

  In addition, another feature of the present invention is that the electromagnetic induction heating apparatus further includes a heat sink including one or more protrusions provided on the back surface side of the table.

  According to the other feature of the present invention configured as described above, the electromagnetic induction heating device is efficiently provided with the heat sink including one or more protrusions protruding from the back surface side of the table. The back of the table can be cooled.

  Another feature of the present invention is that in the electromagnetic induction heating device, the heat sink is formed to extend continuously or intermittently in the rotational driving direction of the table.

  According to another feature of the present invention configured as described above, the electromagnetic induction heating device smoothly rotates and drives the table because the heat sink is formed to extend continuously or intermittently in the rotational driving direction of the table. As a result, the air supplied by the gas supply machine can be smoothly circulated along the rotational driving direction of the table to effectively cool the back surface of the table.

  Another feature of the present invention is that, in the electromagnetic induction heating device, the heat sink is formed between the magnet held by the table and the magnet.

  According to the other feature of the present invention configured as described above, since the electromagnetic induction heating device is formed between the magnet and the heat sink held by the table, the gas supplied by the gas supply table can be tabled. It is possible to lead to the portion directly below the magnet held by the magnet and to cool the magnet effectively.

In order to achieve the above object, according to the present invention , each magnetic pole of a plurality of magnets is in the same direction on the side of a work support that supports an object to be heated and the object to be heated supported by the work support. A table to be arranged flatly, and a table driving means for rotationally driving the table with respect to the object to be heated, and rotating and displacing the plurality of magnets to the object to be heated An electromagnetic induction heating device for generating and heating an induction current, comprising: a heat sink comprising one or more projections provided protruding on the back side of the table, the heat sink being continuous in the rotational driving direction of the table or Ru can be intermittently extending formation.

  In this case, as the gas, in addition to air, an inert gas such as nitrogen can be used. In addition to the fan, a compressor can be used as the gas supplier.

According to this, since the electromagnetic induction heating device includes the heat sink including one or more protrusions formed continuously or intermittently extending in the rotational driving direction of the table on the back surface side of the table, the table Can be smoothly driven to rotate, and the air supplied by the gas supply device can be smoothly circulated along the rotational driving direction of the table to effectively cool the back surface of the table. That is, the electromagnetic induction heating device according to the present invention can cool the magnet for heating the object to be heated without reducing the heating efficiency of the object to be heated.

In order to achieve the above object, according to the present invention , each magnetic pole of a plurality of magnets is in the same direction on the side of a work support that supports an object to be heated and the object to be heated supported by the work support. A table to be arranged flatly, and a table driving means for rotationally driving the table with respect to the object to be heated, and rotating and displacing the plurality of magnets to the object to be heated An electromagnetic induction heating device for generating and heating an induced current, comprising: a heat sink comprising one or more protrusions provided protruding on the back surface side of the table, the heat sink comprising a magnet held by the table and the magnet Ru can be formed between the.

  In this case, as the gas, in addition to air, an inert gas such as nitrogen can be used. In addition to the fan, a compressor can be used as the gas supplier.

According to this, since the electromagnetic induction heating device includes the heat sink including the one or more protrusions formed between the magnet held on the table on the back side of the table, the gas supply machine The introduced gas can be introduced to the portion directly below the magnet held on the table, and the magnet can be effectively cooled. That is, the electromagnetic induction heating device according to the present invention can cool the magnet for heating the object to be heated without reducing the heating efficiency of the object to be heated.

It is a front view which shows typically the structure of the electromagnetic induction heating apparatus which concerns on one Embodiment of this invention. FIG. 2 is a block diagram of a control system that controls the operation of the electromagnetic induction heating device. It is a perspective view which shows the outline of an external appearance structure of the to-be-heated target object which is a target heated with the electromagnetic induction heating apparatus shown in FIG. It is a top view which shows the outline of an external appearance structure on the surface side of the table provided with the magnet which comprises the electromagnetic induction heating apparatus shown in FIG. It is a top view which shows the outline of the external appearance structure by the side of the back of the table shown in FIG. It is the elements on larger scale which show the detail of a structure in broken-line circle A shown in FIG. It is a front view which shows typically the structure of the electromagnetic induction heating apparatus which concerns on the modification of this invention.

  Hereinafter, an embodiment of an electromagnetic induction heating device according to the present invention will be described with reference to the drawings. FIG. 1 is a front view schematically showing the structure of an electromagnetic induction heating device 100 according to the present invention. FIG. 2 is a block diagram of a control system that controls the operation of the electromagnetic induction heating device 100. The electromagnetic induction heating device 100 is a mechanical device for preheating an object WK to be heated, which is an ingot of an aluminum material as a raw material of products such as an aluminum hole or an aluminum sash, in a manufacturing process of the product.

  First, the object to be heated WK will be briefly described. As shown in FIG. 3, the object WK to be heated is an object to be heated by the electromagnetic induction heating device 100, and is formed by forming an aluminum material in a bar shape. More specifically, the to-be-heated target object WK is formed in a trapezoidal pyramid shape as a whole whose cross-sectional shape is formed in a trapezoidal shape.

(Configuration of electromagnetic induction heating device 100)
The electromagnetic induction heating device 100 is a mechanical device for generating an induction current in the object to be heated WK and heating it, and mainly includes the table 101, the magnet 105, the back jacket 107, the electric motor 118, the vertical movement drive mechanism 122, A work support 124 and a control device 130 are provided respectively.

  As shown in FIG. 4, the table 101 is a component for holding a plurality of magnets 105, and is constituted by a plate-like body having a circular shape in plan view (hereinafter also referred to as a “disk body”). More specifically, in the table 101, the magnet holding portion 102, the heat sink 103 and the table-side throttling portion forming portion 104 are formed on the disc, respectively, and the table 101 is the back surface 101a of the disc. A connecting shaft portion 101b is formed and configured to extend in a rod shape from the central portion toward the lower side in the drawing.

  The magnet holding portion 102 is a portion for holding the magnet 105, and is formed of a bottomed hole. In this case, the magnet holding portion 102 is formed at a depth such that one end face of the N pole and the S pole is exposed to the object to be heated WK disposed to face the table 101. In the magnet holding portion 102, a plurality of magnet holding portions 102 are formed at equal intervals on each circumference of three concentric circles centered on the rotational drive center of the table 101. In FIG. 4, the workpiece support 124 and the object to be heated WK are each shown by a two-dot chain line.

  The heat sink 103 is a portion for absorbing and radiating the heat of the magnet 105 held by the table 101 as shown in FIG. 5, and the side opposite to the side where the magnet holding portion 102 of the table 101 is open It protrudes in the back surface 101a side used as the side), and is formed. More specifically, the heat sink 103 is formed in an annular shape which is continuously dropped from the circumference of four concentric circles centered on the rotational drive center of the table 101 along the same circumference downward in the figure.

  In this case, the heat sink 103 has a trapezoidal cross-sectional shape whose thickness decreases from the back surface 101a toward the tip end. In addition, the heat sink 103 is disposed between the respective magnet holding portions 102 formed respectively on three concentric circles, inside the magnet holding portion 102 on the innermost side, and outside the magnet holding portion 102 on the outermost side. It is formed.

  The table-side throttling portion forming portion 104 is a portion that cooperates with a jacket-side throttling portion forming portion 112 described later to form the throttling portion 113 to suppress the flow of air in the hollow portion 108 as shown in FIG. The outer peripheral portion of the table 101 is formed so as to protrude radially outward. More specifically, in the table-side throttling portion forming portion 104, a plurality of annular projecting pieces 104a protruding radially outward on the outer peripheral portion of the table 101 are provided in a plurality at predetermined intervals in the axial direction of the table 101 (this embodiment 3) are formed.

  The magnet 105 is a component for generating an induction current in the object to be heated WK, and is formed in a cylindrical shape. The magnets 105 are respectively accommodated in a plurality of magnet holding portions 102 formed on the plate surface of the table 101 in a state in which one of the end surfaces is exposed. In this case, the magnets 105 are accommodated in the table 101 in the direction in which the magnetic poles (in the present embodiment, the N pole) are exposed to the same plate surface side of the table 101. Each magnet 105 is held flush with the surface of the table 101.

  Each of the magnets 105 may be held in a state in which it is inward of the plate surface of the table 101, or may be held in a state of protruding from the plate surface. Further, the arrangement mode of each magnet 105 is appropriately determined according to the specification of the heating of the object to be heated WK, and it is natural that it is not limited to the present embodiment. Further, although neodymium magnets are used as the magnets 105 in this embodiment, magnets other than neodymium magnets, for example, various magnets such as ferrite, samarium cobalt or alnico can be used.

  In the table 101, an output shaft of the electric motor 118 is connected to a connecting shaft portion 101b formed on the back surface 101a via a relay shaft 106 having a coupling. Further, the back surface 101 a side of the table 101 is covered by the back surface jacket 107.

  The back surface jacket 107 is a component that covers the cavity 101 formed on the back surface 101 a side of the table 101 and is formed by forming a metal material in a cylindrical shape. More specifically, the back surface jacket 107 mainly includes the facing portion 107a and the side surface portion 107b.

  The facing portion 107 a is a flat ring-shaped component disposed to face the back surface 101 a of the table 101 at a distance. In this case, the position where the facing portion 107 a is separated from the back surface 101 a of the table 101 is a position separated by a distance necessary to form the hollow portion 108. While two through holes are formed in the facing portion 107a, the gas supply device 110 and the gas discharge device 111 are respectively provided in the respective through holes.

  The side surface portion 107 b is a cylindrical component that is disposed on the outer edge portion of the facing portion 107 a and covers the space between the back surface 101 a of the table 101 and the facing portion 107 a. One side (the lower side in the figure) of the side surface portion 107b is integrated with the opposing portion 107a by welding, and a jacket-side throttling portion forming portion 112 is provided at the other end portion.

  Thus, a cavity 108 is formed in the space surrounded by the back surface 101a of the table 101, the facing portion 107a, and the side surface portion 107b. The rear surface jacket 107 is supported by the movable support base 117 via a support sleeve 116 formed at the center of the facing portion 107 a in a state where the side surface portion 107 b is slidably fitted to the cover sleeve 115.

  The hollow portion 108 is a portion for accumulating air for cooling the back surface 101 a of the table 101. The size of the hollow portion 108 is appropriately set according to the surface area of the back surface 101 a of the table 101 and the cooling capacity.

  The gas feeder 110 is a mechanical device for feeding air into a cavity 108 formed inside the back jacket 107. Specifically, the gas supplier 110 is constituted by a fan whose operation is controlled by a controller 130 described later. The gas feeder 110 is fitted into a through hole formed in the facing portion 107 a of the back surface jacket 107. In this case, the gas supply device 110 is provided at a position that is radially inward of the gas discharge device 111 at the facing portion 107a.

  The gas discharger 111 is a mechanical device for discharging air to the outside of the back jacket 107 in a cavity 108 formed inside the back jacket 107. Specifically, the gas discharger 111 is configured by a fan whose operation is controlled by the controller 130. The gas discharger 111 is fitted into a through hole formed in the facing portion 107 a of the back surface jacket 107. In this case, the gas discharger 111 is provided at a position radially outward of the gas discharger 111 at the facing portion 107a.

  The jacket-side throttle portion forming portion 112 is a portion that cooperates with the table-side throttle portion forming portion 104 to form the throttle portion 113 to suppress the flow of air in the hollow portion 108, as shown in FIG. Between the three projecting pieces 104a constituting the table-side squeezing portion forming portion 104, two disc bodies made of metal are disposed so as not to be in contact with the projecting pieces 104a. In this case, the two disks are stacked on the side surface portion 107b and fixed by bolts. As a result, between the table-side throttling portion forming portion 104 and the jacket-side throttling portion forming portion 112, in a state of being communicated with the hollow portion 108, it repeatedly extends in a zigzag manner to the upper surface side of the table 101 while communicating with the outside air. An annular constricted portion 113 is formed.

  A flow passage changing plate 114 is provided at the upper end portion of the jacket-side throttle portion forming portion 112 in the drawing. The flow passage changing plate 114 is a component for changing the direction of the opening where the narrowed portion 113 opens toward the object to be heated WK, and the outer edge of the metal flat annular body is bent downward in the drawing. It is formed in shape. As a result, the opening on the side communicating with the outside air in the throttling portion 113 is bent outward in the radial direction of the table 101, and further bent downward in the drawing so as to be opened.

  The cover sleeve 115 is a component that covers the space between the back surface jacket 107 and the base housing 123, and is configured by forming a metal material in a cylindrical shape. The cover sleeve 115 has one end (the lower side in the figure) fixed on the base housing 123, and the other side has the side surface portion 107b of the back surface jacket 107 sliding in the vertical direction in the figure via the sealing material. It fits in a movable state.

  The support sleeve 116 is a component for supporting the relay shaft 106 and the back surface jacket 107 on the movable support base 117, and is configured by forming a metal material in a cylindrical shape. One end of the support sleeve 116 (lower in the drawing) is fixed on the movable support base 117, and the other end (upper in the drawing) fixedly supports the back jacket 107. Further, the support sleeve 116 rotatably supports the relay shaft 106 via a bearing on the inner circumferential portion.

  The movable support base 117 is a component for supporting the table 101, the back surface jacket 107, and the electric motor 118, and is configured by forming a plate material made of metal in a box shape. The movable support base 117 is supported by the vertical movement drive mechanism 122 in a state of being connected to the guide support 121 via the linear guide 120.

  The electric motor 118 is a drive source for rotationally driving the table 101, and is constituted by a servomotor whose operation is controlled by the control device 130. That is, the electric motor 118 corresponds to the table driving means according to the present invention. The electric motor 118 is connected to the table 101 via a relay shaft 106.

  The linear guide 120 is a component for guiding the table 101, the back jacket 107, and the electric motor 118 in the vertical direction shown in the drawing, which approaches or separates from the object to be heated WK. A slider provided on the movable support base 117 and reciprocated on rails provided on the guide support 121 is constituted.

  The guide support 121 is a component for supporting a rail that constitutes the linear guide 120, and is configured by forming a metal material in an L shape. In this case, the guide support 121 is formed extending along the guiding direction so as to support the rails provided on the guiding support 121 along the guiding direction of the table 101, the back jacket 107 and the electric motor 118. There is. The guide support 121 is supported by the base housing 123.

  The vertical movement drive mechanism 122 is a mechanical device provided with a drive source for displacing the table 101, the back jacket 107, and the electric motor 118 in a direction approaching or separating from the object to be heated WK. The vertical movement drive mechanism 122 includes an electric motor (for example, an AC servomotor, not shown) operated and controlled by the control device 130, a jack for converting the rotational driving force of the electric motor in the vertical direction, and a base housing of the jack Each has a support supported on 123, and is comprised. That is, the movable support base 117, the linear guide 120, the guide support 121, and the vertical movement drive mechanism 122 approach the table 101, the back jacket 107 and the electric motor 118 integrally approaching or separating from the object to be heated WK. It constitutes a mechanism.

  The base housing 123 is a component for supporting the table 101, the back jacket 107, the cover sleeve 115 and the work support 124 while accommodating the approach mechanism and the electric motor 118, and makes the metal rod-like body into a box shape. It is composed of a group. A top plate 123b is attached to the base casing 123. The top plate 123b is formed of a plate-like body having a through hole 123a formed at the upper end in the figure at which the support sleeve 116 penetrates. 124 are each supported.

  The workpiece support 124 is a component for supporting the object to be heated WK on the table 101, and the base casing on the outside of the table 101 so that the object to be heated WK can be hung on the plate surface of the table 101. It is provided on 123 respectively. In this case, the workpiece support 124 is provided at a position to support the object to be heated WK at a position offset radially outward with respect to the rotational drive central portion on the plate surface of the table 101. The workpiece support 124 is formed in a V-shape in which both ends are fitted from above so as to support both ends of the object to be heated WK from below.

  The work support 124 is provided with a temperature detector 125. The temperature detector 125 detects the temperature of the object to be heated WK and outputs the temperature to the control device 130.

  The control device 130 is configured by a microcomputer including a CPU, a ROM, a RAM, and the like, and comprehensively controls the overall operation of the electromagnetic induction heating device 100, and a heating processing program (not shown) stored in advance in a storage device. Heat treatment of the object to be heated WK is performed. Specifically, the control device 130 controls the operation of the electric motor 118 to rotate the table 101, and controls the operation of the gas supply device 110 and the gas discharge device 111 to form a hollow portion in the back surface jacket 107. Supply air to 108. Further, the control device 130 controls the operation of the vertical movement drive mechanism 122 to control the position of the table 101 in the vertical direction in the drawing.

  The control device 130 includes an input device including a switch group for receiving an instruction from a worker and inputting the instruction to the control device 130, and a control panel 131 having a display lamp for displaying the operation status of the control device 130 and a liquid crystal display device. Is equipped. The control device 130 includes a power supply unit that receives power from the external power supply and supplies power to the gas supply device 110, the gas discharge device 111, the electric motor 118, the vertical movement drive mechanism 122, etc. Is not directly related to the present invention, the description thereof is omitted. The control device 130 may be housed in a metal box and attached to the outer surface of the base housing 123, but may be provided at a position away from the base housing 123 via a wire. Good.

(Operation of electromagnetic induction heating device 100)
Next, the operation of the electromagnetic induction heating apparatus 100 configured as described above will be described. In this operation explanation, in the process of manufacturing aluminum products such as aluminum holes or aluminum sash, the object to be heated WK is 400 before the melting step in the melting furnace. The preheating operation | work which makes it heat to -500 degreeC and it softens is demonstrated.

  First, the operator operates the operation panel 131 to turn on the electromagnetic induction heating apparatus 100. Thereby, the control device 130 executes a control program (not shown) to control the operation of the vertical movement drive mechanism 122 to lower the table 101 and position it at the position most distant from the object to be heated WK.

  Next, the operator sets the object to be heated WK on the electromagnetic induction heating device 100. Specifically, the operator places the object to be heated WK on the workpiece support 124 in the electromagnetic induction heating device 100. More specifically, the worker is directed to the object to be heated WK in such a direction that the surface on the upper bottom side (the upper surface in the figure) of the object to be heated WK having a trapezoidal cross-sectional shape faces the table 101. Both ends are placed on the work support 124 respectively.

  In this case, since the workpiece support 124 is formed of two inclined surfaces opened in a V-shape toward the upper side, the workpiece support 124 is engaged with the two side surfaces of the object to be heated WK and is stable. The object to be heated WK can be supported. The setting operation of the object to be heated WK may be performed manually by the operator manually or by using a mechanical device such as a robot arm that holds the object to be heated WK and places it on the workpiece support 124 May be Further, the object to be heated WK may be disposed so that the surface on the lower bottom side (the surface on the lower side in the drawing) of the trapezoidal shape faces the table 101. In this case, the workpiece support 124 may be formed in a planar shape on which both ends of the object to be heated WK are placed.

  Next, the operator positions the magnet 105 with respect to the object to be heated WK. Specifically, the operator operates the operation panel 131 to operate the vertical movement drive mechanism 122 so that the plate surface of the table 101 is brought closest to the object to be heated WK in the range where the plate surface does not contact the opposing surface. Position on

  Next, the worker heats the object to be heated WK. Specifically, the operator operates the operation panel 131 to instruct the control device 130 to execute the heat treatment program. In response to this instruction, control device 130 drives table 101 to rotate by operating electric motor 118. Thus, the object to be heated WK is rapidly heated by the induced current generated inside.

  The control device 130 also starts the operation of the gas supplier 110 and the gas ejector 111 simultaneously with the start of the operation of the electric motor 118. As a result, the air is introduced by the gas supplier 110 and the air in the cavity 108 is discharged out of the cavity 108 by the gas discharger 111 (see FIG. 1). See dashed arrow in). In this case, the air guided into the hollow portion 108 is guided radially outward of the table 101 by the rotational drive of the table 101, so the air is smoothly discharged from the gas discharger 111.

  In the present embodiment, the air in the base housing 123 is introduced into the hollow portion 108 by the gas supplier 110 and the air in the hollow portion 108 is discharged into the base housing 123 by the gas discharging machine 111. . Thus, the influence of the flow of air introduced or discharged to the hollow portion 108 can be accommodated in the base housing 123.

  On the other hand, the table 101 is heated together with the magnet 105 by heating the object to be heated WK. In this case, in the table 101, the heat sink 103 is provided on the back surface 101a, and the heat sink 103 is provided in the hollow portion 108, whereby the temperature rise can be suppressed. Thereby, the temperature rise of the magnet 105 hold | maintained at the table 101 is suppressed, and the fall of magnetic force is suppressed.

  In addition, a part of the air in the hollow portion 108 leaks to the outside of the electromagnetic induction heating device 100 through the throttling portion 113 (see a dashed arrow in FIG. 6). In this case, since the outlet of the narrowed portion 113 is opened to the opposite side of the object to be heated WK by the flow passage changing plate 114, the heating of the object to be heated WK is not inhibited.

  Next, when the object to be heated WK reaches a predetermined temperature, the worker stops the heating of the object to be heated WK and takes it out of the electromagnetic induction heating apparatus 100. Specifically, the operator operates the operation panel 131 to instruct the control device 130 to stop the execution of the heat treatment program. In response to this instruction, control device 130 stops the rotational drive of table 101 by stopping the operation of electric motor 118. Thereby, the worker can take out the object to be heated WK on the work support 124.

  In this case, the controller 130 may stop the operation of the gas feeder 110 and the gas discharger 111 simultaneously with the stop of the operation of the electric motor 118, but continues the operation for a while after the stop of the operation of the electric motor 118. It is also good. For example, the control device 130 may stop the operation of the gas supply device 110 and the gas discharger 111 after a predetermined time has elapsed after the operation of the electric motor 118 is stopped, or the temperature detected by the temperature detector 125 is a predetermined temperature The operation of the gas supplier 110 and the gas ejector 111 may be stopped when the following occurs. By these, the electromagnetic induction heating apparatus 100 can prevent the temperature rise of the magnet 105 after the stop of the rotational drive of the table 101.

  In the work of taking out the object to be heated WK, the operator confirms the temperature of the object to be heated WK displayed on the operation panel 131 to confirm that the object to be heated WK has reached a predetermined temperature. Can. In addition, the operator experimentally obtains in advance the time until the object to be heated WK reaches a predetermined temperature, and the object to be heated WK reaches a predetermined temperature depending on the presence or absence of this predetermined time You can also understand that. The control device 130 can also automatically stop the operation of the electric motor 118 when the predetermined temperature is reached or when the predetermined time has elapsed. In addition, the removal work of the object to be heated WK may be manually performed manually by an operator, or using a mechanical device such as a robot arm that grips the object to be heated WK and carries it out from the work support 124 Good.

  Then, the operator puts the object to be heated WK taken out of the electromagnetic induction heating device 100 into the melting furnace, and then pours the melted object to be heated WK into the mold to form a molded article such as an aluminum wheel. The processing process of the object to be heated WK taken out of the electromagnetic induction heating apparatus 100 is not directly related to the present invention, and thus the description thereof is omitted.

  Next, when heat treating the new object to be heated WK, the operator arranges the new object to be heated WK on the work support 124 in the same manner as described above, and executes the heat treatment. On the other hand, the operator turns off the power supply of the electromagnetic induction heating device 100 when finishing the preheating step, and ends the work.

  As can be understood from the above operation description, according to the above embodiment, the electromagnetic induction heating device 100 is not the work support 124 with respect to the table 101 holding the magnet 105 for heating the object to be heated WK. Since the heat sink 103 and the gas supply device 110 for sending air are provided on the opposite side of the back surface 101a, the magnet 105 for heating the object to be heated WK without cooling the object to be heated WK is cooled can do.

  Furthermore, the implementation of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention. In addition, in each modification shown below, the same code | symbol is attached | subjected to the component similar to the electromagnetic induction heating apparatus 100 in the said embodiment, and the description is abbreviate | omitted.

  For example, in the above embodiment, the electromagnetic induction heating apparatus 100 is configured by providing the heat sink 103 and the back surface jacket 107 on the back surface 101 a side of the table 101. However, at least one of the heat sink 103 and the back surface jacket 107 may be provided on the back surface 101 a side of the table 101 in the electromagnetic induction heating apparatus 100. Therefore, in the electromagnetic induction heating apparatus 100, when the heat sink 103 is not provided, the back surface 101a of the table 101 can be formed into a flat and flat shape.

  Moreover, in the said embodiment, the gas supply machine 110 was comprised so that air might be sent toward the back surface 101a in the table 101. FIG. Thus, the electromagnetic induction heating device 100 can suppress the rotational resistance of the table 101 and can effectively cool the table 101. However, the gas feeder 110 can also be configured to send air to the back surface 101 a of the table 101 in a direction other than the direction perpendicular to the radial direction, for example, a direction parallel to the radial direction. In this case, the gas supply device 110 can be provided on the side surface portion 107 b of the back surface jacket 107.

  Further, in the above embodiment, the gas supplier 110 is configured to send air to the portion of the table 101 between the rotational drive center and the outer edge. However, the gas feeder 110 can also be configured to send air toward the rotational drive center of the table 101. In this case, the table 101 can be configured to apply the rotational driving force of the table 101 to the outer edge.

  Moreover, in the said embodiment, the electromagnetic induction heating apparatus 100 provided the back surface jacket 107 in the back surface 101a side of the table 101, and comprised it. However, since the electromagnetic induction heating device 100 only needs to form an air flow on the back surface 101 a side of the table 101, the back surface jacket 107 can be omitted. In this case, the electromagnetic induction heating apparatus 100 can be configured to dispose the gas supply unit 110 so as to form an air flow on the back surface 101 a side of the table 101 and omit the gas discharge unit 111.

  Moreover, in the said embodiment, the back surface jacket 107 was equipped with the gas discharger 111, and was comprised. However, as shown in FIG. 7, the back surface jacket 107 may be configured with the gas discharger 111 omitted, as long as the air in the cavity 108 can be guided to the outside of the cavity 108. In this case, the back surface jacket 107 may be configured by providing an exhaust port 109 formed of a through hole for guiding the air in the hollow portion 108 to the outside of the hollow portion 108 (see the dashed arrow in FIG. 7).

  Further, in the above embodiment, the gas discharger 111 is provided at a position radially outward of the table 101 than the gas supplier 110 at the facing portion 107 a of the back surface jacket 107. Thus, the air in the cavity 108 can be efficiently guided out of the cavity 108. However, it can also be provided at the same radial position of the table 101 as the gas supplier 110 or at the radial inner position of the table 101 than the gas supplier 110 at the facing portion 107 a of the back jacket 107. In the case where the back surface jacket 107 is provided with the exhaust port 109 instead of the gas discharger 111 as described above, the outer side of the back surface jacket 107 in the radial direction from the gas supply device 110 as in the gas discharger 111, It can be formed in the same position in the radial direction or in the radial direction.

  Further, in the above-described embodiment, the throttling portion 113 formed of the flow passage bent between the outer peripheral portion of the table 101 and the back surface jacket 107 is formed. However, the throttling portion 113 formed of a straight flow passage may be formed between the outer peripheral portion of the table 101 and the back surface jacket 107. Further, the throttling portion 113 is a flow passage which is bent or linearly extends between the tip end portion of the side surface portion 107b and the back surface 101a by arranging the tip end portion of the side surface portion 107b of the back surface jacket 107 opposite to the back surface 101a of the table 101. It is also possible to form the narrowed portion 113 made of Further, the electromagnetic induction heating apparatus 100 can be configured such that the throttling portion 113 is omitted by configuring the table 101 and the back surface jacket 107 to be in sliding contact with each other.

  Further, in the above embodiment, the diaphragm unit 113 is configured such that the opening facing the outside opens downward in the drawing. However, the throttling portion 113 may be configured to discharge the air in the hollow portion 108 to the outside. Therefore, the throttling portion 113 is configured such that the opening facing the outside faces the radially outer side of the table 101 by forming the flow passage changing plate 114 in a flat ring shape without bending the outer edge portion of the flow passage changing plate 114. be able to. Further, the narrowed portion 113 may be configured such that the flow passage changing plate 114 is omitted so that the opening facing the outside faces the object to be heated WK.

  Further, in the above-described embodiment, the gas supply unit 110 and the gas discharge unit 111 are each configured by a blower so as to allow air to flow to the hollow portion 108. However, the gas supply device 110 and the gas discharge device 111 may be configured to allow the gas to flow to the cavity 108. Therefore, the gas supplier 110 and the gas ejector 111 may be configured by a compressor such as a pump. The gas supplier 110 can also be configured to supply an inert gas, such as nitrogen, to the cavity 108.

  Moreover, in the said embodiment, the heat sink 103 was arrange | positioned concentrically on the back surface 101a of the table 101, and was comprised with the several annular body extended continuously in the circumferential direction. However, it may be configured by one or more protrusions formed on the back surface 101 a of the table 101. Therefore, the heat sink 103 can be configured by a plurality of annular members arranged concentrically and intermittently extending in the circumferential direction. Also, the heat sink 103 can be formed into a wall shape or a fold shape extending linearly continuously or intermittently. The heat sink 103 can also be configured with one or more hemispherical protrusions on the back surface 101 a of the table 101.

  Further, in the above embodiment, the heat sink 103 is formed between the radially arranged magnets 105 and the magnets 105 arranged concentrically on the back surface 101 a of the table 101. However, the heat sink 103 is formed at the same radial position as the respective magnets 105 in the radial direction arranged concentrically on the back surface 101 a of the table 101, in other words, at the position directly below the respective magnets 105 in the drawing. You can also

  Further, in the above embodiment, when interrupting the rotational drive of the table 101, the control device 130 terminates the operational control of the gas supply device 110 after interrupting the rotational drive control of the table 101 by the electric motor 118. Thereby, the electromagnetic induction heating apparatus 100 can prevent the temperature rise of the magnet 105 after the stop of the rotational drive of the table 101. However, when interrupting the rotational driving of the table 101, the control device 130 ends the operation control of the gas supply machine 110 simultaneously with or prior to the interruption of the rotational driving control of the table 101 by the electric motor 118. It is also good.

  Further, in the above embodiment, the electromagnetic induction heating device 100 is configured to include the control device 130 that controls each operation of the gas supply device 110, the gas discharge device 111, and the electric motor 118. However, the electromagnetic induction heating device 100 can be configured without the control device 130. In this case, the electromagnetic induction heating apparatus 100 may control the operations of the gas supply device 110, the gas discharge device 111, and the electric motor 118 by manual operation by the operator.

  Moreover, in the said embodiment, cross-sectional shape formed the to-be-heated target object WK in trapezoid shape. However, the shape of the object to be heated WK is not limited to the above embodiment, and it may be formed in a shape that can be disposed opposite to the magnet 105 provided on the table 101. Therefore, the object to be heated WK can be formed of a flat plate-like body in addition to a circular rod-like body having a rectangular or triangular cross-sectional shape as well as a circular cross-sectional shape.

  Moreover, in the said embodiment, the to-be-heated target object WK was comprised with the ingot as a raw material of products made from aluminum, such as an aluminum hole or an aluminum sash. However, it is natural that the object to be heated WK may be an ingot as a raw material of various products (for example, a cylinder block made of aluminum etc.) other than the aluminum wheel or the aluminum sash. Further, the object to be heated WK is a paramagnetic substance (for example, aluminum, manganese, platinum or glass) other than an aluminum material or a diamagnetic substance (for example, copper, gold, silver, zinc, lead, glass or wood) It can also be composed of Furthermore, the object to be heated WK may be a semi-finished product in which raw materials are processed before reaching a finished product such as an aluminum wheel or an aluminum sash.

  Further, in the above embodiment, the workpiece support 124 is formed to have a V-shaped cross section in which the object to be heated WK formed into a trapezoidal pyramid shape is fitted from above. However, the workpiece support 124 may be configured to detachably support the object to be heated WK. Therefore, the workpiece support 124 may be provided with a clamp mechanism that holds the object to be heated from above or sideward in a state where the object to be heated WK is placed. The work support 124 can also be configured to support the object to be heated WK while moving on the table 101 like a belt conveyor.

WK: object to be heated,
DESCRIPTION OF SYMBOLS 100 ... electromagnetic induction heat processing apparatus, 101 ... table, 101a ... back surface, 101b ... connection axial part, 102 ... magnet holding part, 103 ... heat sink, 104 ... table side narrow part formation part, 104a ... protrusion piece, 105 ... magnet, 106: relay shaft, 107: back surface jacket, 107a: facing portion, 107b: side surface portion, 108: hollow portion, 109: exhaust port,
DESCRIPTION OF SYMBOLS 110 ... Gas supply machine, 111 ... Gas discharge machine, 112 ... Jacket side throttle part formation part, 113 ... Throttling part, 114 ... Flow-path change board, 115 ... Cover sleeve, 116 ... Support sleeve, 117 ... Movable support base, 118 ... electric motor,
120: Linear guide, 121: Guide support, 122: Vertical movement drive mechanism, 123: Base housing, 124: Work support, 125: Temperature detector,
130: Control device, 131: Control panel.

Claims (11)

A work support for supporting a heated object to be heated;
A table in which magnetic poles of a plurality of magnets are disposed in a planar manner in the same direction on the side of the object to be heated supported by the work support;
Table drive means for rotationally driving the table with respect to the object to be heated, and rotating the plurality of magnets with respect to the object to be heated to generate an induced current in the object to be heated An electromagnetic induction heating device for heating
A gas feeder for feeding a gas to a back side opposite to the work support relative to the table;
And a back surface jacket that covers the back surface together with the hollow portion while forming a hollow portion on the back surface side of the table;
The back jacket is
The gas supplier which sends the gas from the outside of the back jacket to the cavity;
And an exhaust port communicating with the inside and the outside of the rear surface jacket to lead the gas in the hollow portion out of the hollow portion.
In the electromagnetic induction heating device according to claim 1,
The gas supply machine
An electromagnetic induction heating apparatus characterized in that the gas is sent toward the back surface of the table. In the electromagnetic induction heating device according to claim 1 or 2,
The gas supply machine
An electromagnetic induction heating apparatus characterized in that the gas is fed to a portion of the table between a rotary drive center and an outer edge. The electromagnetic induction heating device according to any one of claims 1 to 3.
The exhaust port is
Electromagnetic induction heating device according to claim Rukoto distance from the rotation driving center of the table is formed at a position farther than the distance from the rotation driving center of the table of the gas feeder. The electromagnetic induction heating device according to any one of claims 1 to 4.
Electromagnetic induction heating device according to claim Rukoto with a gas discharger for guiding the gas in the cavity to the outlet to the outside of the cavity. The electromagnetic induction heating device according to any one of claims 1 to 5,
The back jacket and the table are
The portion facing each other in close positions to each other, an electromagnetic induction heating device characterized that you have provided a throttle portion for communicating with bending and non-contact each other overhanging the back side jacket and the cavity outside each other. In the electromagnetic induction heating device according to claim 6 ,
The throttling portion is
The electromagnetic induction heating apparatus characterized in that the opening to the outside of the back surface jacket is directed to a direction other than the object to be heated disposed opposite to the table . The electromagnetic induction heating device according to any one of claims 1 to 7, further comprising:
A controller configured to control operations of the table drive means and the gas supply device;
The controller is
When interrupting the rotation of the table, an electromagnetic induction heating device characterized that you end the operation control of the gas supply apparatus after interrupting the rotation drive control of said table by said table drive means. The electromagnetic induction heating device according to any one of claims 1 to 8, further comprising:
Electromagnetic induction heating device according to claim Rukoto with one or sink comprising a plurality of protrusions which protrudes from the back surface side of the table. In the electromagnetic induction heating device according to claim 9 ,
The heat sink is
Electromagnetic induction heating device characterized that you have formed to extend continuously or intermittently to a rotary drive direction of said table. The electromagnetic induction heating device according to claim 9 or 10
The heat sink is
An electromagnetic induction heating device characterized in that it is formed between the magnet held by the table and the magnet .

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