JP2019216052A - Object to be heated for electromagnetic induction heating device, heating method for object to be heated, and manufacturing method for aluminum wheels - Google Patents

Abstract

To provide an object to be heated for an electromagnetic induction heating device, a heating method for an object to be heated, and a manufacturing method for aluminum wheels, capable of reducing or uniformizing a heating period.SOLUTION: An object 100 to be heated, a heating target of an electromagnetic induction heating device 200, is formed in a trapezoidal pyramid shape as a whole, the object to be heated having a cross-sectional shape formed in a trapezoidal shape. The object 100 to be heated has a plane surface part 101 formed on a face on the side corresponding to an upper base of the trapezoidal shape. The plane surface part 101 is a part to be disposed so as to face a magnet 203 of the electromagnetic induction heating device 200, is a plane surface in parallel with a rotary surface of the magnet 203, and has flatness equal to or lower than 5 mm. In the object 100 to be heated, each of four side faces 102 adjacent to the plane surface part 101, which are faces other than the plane surface part 101, and a bottom face 103 on the side opposite to the plane surface part 101 is formed in an approximately plane surface. The object 100 to be heated is formed by performing casting processing on an aluminium material.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an object to be heated, a method for heating the object to be heated, and a method for manufacturing an aluminum wheel for an electromagnetic induction heating device that generates an induction current to heat the object to be heated.

  2. Description of the Related Art Conventionally, there has been known an electromagnetic induction heating device that generates an induced current in an object to be heated made of a conductor and heats the object. 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.

JP 2018-18604 A

  However, when an object to be heated is heated using the electromagnetic induction heating device described in Patent Document 1, even if the object to be heated has the same shape, the time required to reach a predetermined temperature for each object to be heated. However, there has been a problem that the heating efficiency is low due to a phenomenon that the temperature does not reach the predetermined temperature even if the temperature is different or time is required.

  The present invention has been made to address the above-described problems, and has as its object the object to be heated, the method for heating the object to be heated, and the method for heating an object to be heated for an electromagnetic induction heating device capable of shortening or uniformizing the heating time. An object of the present invention is to provide a method for manufacturing a wheel.

  In order to achieve the above object, a feature of the present invention is an object to be heated, which is an object to be heated by an electromagnetic induction heating device, wherein the electromagnetic induction heating device has a plurality of magnets, each magnetic pole of which is arranged in a plane in the same direction. Table, a table driving means for relatively rotating the object to be heated and the table, and a work support for supporting the object to be heated in a state facing each magnet of the table, An object to be heated is heated by generating an induced current in the object to be heated by relatively rotating and displacing the object to be heated and the table opposed to the magnet, and the object to be heated faces each magnet of the table. That is, a flat part having a flatness of 5 mm or less is formed as a plane parallel to the rotation plane of each magnet.

  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 such that a portion of the table facing each magnet is a plane parallel to the rotation surface of each magnet and a plane. Since the flat portion having a degree of 5 mm or less is formed, according to the experiments of the present inventors, the heating time of the object to be heated can be shortened and the heating time can be made uniform.

  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 to have a trapezoidal cross-section and extend in a rod shape, and the flat portion has a trapezoidal shape. Is formed on the trapezoidal upper bottom surface of the object to be heated.

  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 to extend in a bar shape, and the flat portion has a trapezoidal shape. The trapezoidal shape is formed on the upper bottom surface 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.

  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 rotating circle of the table. A rough portion where a flat portion is not formed is formed at a central portion of the relatively rotating table, which is a portion where the table of the object to be heated is opposed to the table, and the flat portion is formed outside the rough portion. That is being done.

  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 of the object to be heated formed in a plate shape or a rod shape, in which the table is arranged to face. In addition, a rough portion having no flat portion is formed at a center portion of the table which relatively rotates, 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.

  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 of heating an object to be heated and a method of manufacturing an aluminum wheel.

  Specifically, 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 driving unit for relatively rotating the object to be heated and the table. And a work support for supporting the plate-shaped or rod-shaped object to be heated in a state facing each magnet of the table, and relatively rotating the object to be heated and the table arranged opposite to each magnet. A heating method of an object to be heated using an electromagnetic induction heating device that generates an induced current in the object to be heated by displacing and heats the object, and has the highest flatness among the outer surfaces of the object to be heated. The method may further include a work arranging step of arranging the object to be heated on the work support so that the portion is arranged as a plane portion so as to face each magnet. The other side of the object to be heated Compared with the case where the opposed to the magnet, it is possible to shorten and uniformity of the heating time.

  In this case, the heating method of the object to be heated is such that the object to be heated has a flat surface on at least a part of the outer surface, the plane being parallel to the rotation surface of each magnet and having a flatness of 5 mm or less. In the work arrangement step, the object to be heated may be arranged on the work support such that the flat portion is opposed to each magnet. 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.

  In this case, the heating method of the object to be heated includes, on at least a part of the outer surface of the object to be heated, a flat part parallel to the rotation surface of each magnet and having a flatness of 5 mm or less. The work placement step may include forming a flat portion to be formed, and the work placement step may include arranging the object to be heated on a work support such that the flat portion is opposed to each magnet. 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.

  In this case, in the heating method of the object to be heated, the object to be heated is formed such that the cross-sectional shape is trapezoidal and extends in a rod shape. It is preferable to form a flat portion 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.

  In addition, the method of manufacturing an aluminum wheel includes, specifically, a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a table driving means for relatively rotating the object to be heated and the table. And a workpiece support for supporting a bar-shaped object to be heated, which is a raw material of an aluminum wheel, in a state facing each magnet of the table. A method for manufacturing an aluminum wheel using an electromagnetic induction heating device that generates an induced current in an object to be heated by rotating and heating the object to be heated, 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 object on a workpiece | work support so that a high part may be arrange | positioned facing each magnet 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.

  In this case, in the method for manufacturing an aluminum wheel, the object to be heated has a flat portion on at least a part of the outer surface, the flat portion being parallel to the rotation surface of each magnet and having a flatness of 5 mm or less. In the work arranging step, the object to be heated may be arranged on the work support so that the plane portion is arranged to face each magnet. 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.

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 | operation of an electromagnetic induction heating apparatus. FIG. 3 is a plan view illustrating an outline of an external configuration of a table including a magnet constituting the electromagnetic induction heating device illustrated in FIG. 2. 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. 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. 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. 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. 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. 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.

  Hereinafter, an embodiment of an object to be heated for an electromagnetic induction heating device according to the present invention (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 will be described with reference to the drawings. I will explain it. FIG. 1 is a perspective view schematically showing an external configuration of a heated object 100 according to the present invention. FIG. 2 is a perspective view schematically showing the external configuration of the object to be heated 100 when the object to be heated 100 shown in FIG. 1 is viewed from the opposite side in the vertical direction in the drawing. 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 hole or an aluminum sash, and is an object to be heated by an electromagnetic induction heating device 200 described later in a process of manufacturing these products.

(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.

  The flat portion 101 is a portion facing the magnet 203 of the electromagnetic induction heating device 200, and is a flat surface parallel to the rotation surface of the magnet 203 and has 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.

  Surfaces of the object to be heated 100 other than the flat portion 101, specifically, four side surfaces 102 adjacent to the flat portion 101 and a bottom surface 103 opposite to the flat portion 101 are formed substantially flat. 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.

(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.

  As shown in FIG. 5, the table 201 is a component for holding a plurality of magnets 203, and is configured by a plate-shaped body having a circular shape in plan view (hereinafter, also referred to as a “disk”). 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). 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.

  The magnet 203 is a component for generating an induced current in the object to be heated 100, and is formed in a columnar 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.

  The magnets 203 are arranged concentrically around the center of rotation of the table 201 and are arranged at equal intervals along the circumferential direction of each concentric circle. 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.

  In addition, each magnet 203 may be held in a state in which it enters inside the plate surface of the table 201, or may be held in a state where it protrudes 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.

  The electric motor 204 is a drive source for driving the table 201 to rotate, and is configured by a servomotor 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 integrally moving the table 201 toward and 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 component for supporting the electric motor 204, and is formed by forming a metal material into 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 to approach or separate 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 reciprocates 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 provided with a drive source for displacing the table 201 and the electric motor 204 in a direction to 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 220 is a component for supporting the approach mechanism 210 and the work support 221, and is configured by assembling a metal rod into 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 work support 221 is a component for supporting the object to be heated 100 on the table 201, and an outer support outside the table 201 so that the object to be heated 100 can be hung on the plate surface of the table 201. 220 are provided. 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.

  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 a storage device in advance. Is performed, the heat treatment of the object to be heated 100 is performed. 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.

  The control device 230 includes an input device composed of a switch group for receiving an instruction from an operator and inputting the input to the control device 230, an operation panel 231 having a display lamp for displaying 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.

(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 the operation, as shown in FIG. 6, in the process of manufacturing an aluminum product such as an aluminum hole or an aluminum sash, in a process before melting the object to be heated 100 as a raw material in a melting furnace. A preheating operation of heating the object to be heated 100 to 400 to 500 ° C. to soften the object will be described.

  First, the operator turns on the power of 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.

  Next, the worker performs a work arrangement step of 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 setting operation of the object to be heated 100 may be directly performed manually by an operator, or may be performed using a mechanical device such as a robot arm that holds the object to be heated 100 and mounts the object on the work support 221. You may.

  Next, the operator positions the magnet 203 with respect to the object to be heated 100. Specifically, the operator operates the operation panel 231 to operate the approach mechanism 210 to bring the plate surface of the table 201 to a position where the table surface is closest to the flat portion 101 of the object to be heated 100 without being brought into contact with the flat portion 101. Position. 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.

  Next, the worker heats the object to be heated 100. 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.

  Here, results of a heating experiment performed on the object to be heated 100 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.

  In the graph shown in FIG. 9, the horizontal axis represents the time from the start of the rotation driving of the table 201, and the vertical axis represents the temperature of the object to be heated 100. 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.

  Next, when the object to be heated 100 reaches a predetermined temperature, the worker stops heating the object to be heated 100 and takes it out of 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 to be heated 100 on the work support 221.

  In the work of taking out the object to be heated 100, the worker checks the temperature of the object to be heated 100 displayed on the operation panel 231 to confirm that the temperature of the object to be heated 100 has reached a predetermined temperature. Can be. 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. The controller 230 can also automatically stop the operation of the electric motor 204 when the temperature reaches the predetermined temperature 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.

  Then, the worker puts the object to be heated 100 taken out of the electromagnetic induction heating device 200 into a melting furnace, and then pours the molten object to be heated 100 into a mold to form a molded article 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.

  Next, when heating the new object to be heated 100, the operator arranges the new object to be heated 100 on the work support 221 and executes the heating process 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.

  As can be understood from the above description of the operation, according to the embodiment, the object to be heated 100 used in the electromagnetic induction heating device 200 has a portion facing the magnets 203 of the table 201 and a rotating surface of each magnet 203. Is formed, and the flat portion 101 having a flatness of 5 mm or less is formed, so that the heating time of the object to be heated 100 can be reduced and the heating time can be made uniform. .

  Furthermore, in carrying out the present invention, 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 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. .

  For example, in the above embodiment, the object to be heated 100 has the flat portion 101 formed on the upper bottom surface (the upper surface in FIG. 1) of the object to be heated 100 having a trapezoidal cross section. . However, the flat portion 101 only needs to be formed on a surface of the object to be heated 100 that can be arranged to face the magnet 203 provided on the table 201. 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.

  Further, in the above-described embodiment, the object to be heated 100 is formed such that the flat portion 101 is formed on the entire surface of the upper surface of the object to be heated 100 (the upper surface in FIG. 1) having a trapezoidal cross section. Formed. However, the flat portion 101 only needs to be formed on a surface of the object to be heated 100 that can be arranged to face the magnet 203 provided on the table 201. 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.

  Therefore, as shown in FIG. 10, the object 100 to be heated has a flatness lower than the flatness of the flat portion 101 without forming the flat portion 101 in a portion opposed to the central portion of the rotary drive of the table 201. The rough portion 104 may be formed, and the flat portion 101 may 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.

  In the above embodiment, the object to be heated 100 has a trapezoidal conical shape with a trapezoidal cross section. However, the object to be heated 100 only needs to be formed in a shape that can be arranged to face the magnet 203 provided on the table 201 of 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.

  In this case, the object to be heated 100 may have a flat portion 101 formed on at least a part of the outer surface. However, according to the present invention, even when the flat portion 101 is not formed on the object to be heated 100, a portion having the highest flat portion 101 on the outer surface of the object to be heated 100 is defined as the flat portion 101. By arranging the magnet 201 to face the magnet 203, it is possible to improve the shortening of the heating time of the object to be heated 100 and the uniformity of the heating time.

  When the flat portion 101 is not formed on the object 100 to be heated, as shown in FIG. 11, before the object 100 to be heated is heated by the electromagnetic induction heating device 200, A flat portion forming step of forming the flat portion 101 on at least a part of the outer surface of the substrate. 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.

  Further, in the above embodiment, the object to be heated 100 is formed of an ingot as a raw material of an aluminum product such as an aluminum hole 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.

  In the above embodiment, the table 201 is formed in a disk 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.

  In the above embodiment, the electromagnetic induction heating device 200 is configured such that the table 201 is driven to rotate with respect to the object to be heated 100. 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.

  In the above embodiment, the flatness of the flat portion 101 is set to 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.

  In the above-described embodiment, the work support 221 has a V-shaped cross section in which the heating target 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.

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.

In order to achieve the above object, the feature of the present invention is an object to be heated consisting of a raw material or a semi-finished product that is softened by heating by an electromagnetic induction heating device in a process leading to a finished product , A table in which the magnetic poles of the plurality of magnets are arranged in the same direction in a plane, a table driving means for relatively rotating 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 supports the object in a state, and heats the object to be heated by generating an induced current in the object to be heated by relatively rotating and displacing the object to be heated and the table opposed to each magnet. The object to be heated is such that a portion of the table opposed to each magnet is a flat surface parallel to the rotation surface of each magnet and has a flatness of 5 mm or less.

Specifically, 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 driving unit for relatively rotating the object to be heated and the table. And a work support for supporting the plate-shaped or rod-shaped object to be heated in a state facing each magnet of the table, and relatively rotating the object to be heated and the table arranged opposite to each magnet. a heating method of the heated object using electromagnetic induction heating apparatus for heating causing an induced current to the object to be heated by displacing, electromagnetic in steps up to the heated object, reaches the finished product 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 surface that is parallel to the rotation surface of each magnet and has a flatness of 5 mm or less. do it Ri 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, in the method of heating the object to be heated, the heating time can be shortened and made uniform as compared with the case where the other surface of the object to be heated is arranged to face each magnet.

In this case, the heating method of the object to be heated is such that the object to be heated has a trapezoidal cross section and is formed to extend in the shape of a bar, and the flat portion has a trapezoidal upper bottom in the trapezoidal object to be heated. It may be formed on the side surface . According to this, the heating method of the object to be heated can expect the same operation and effect as those of the object to be heated.

Further, the heating method of the object to be heated includes a table in which the magnetic poles of the plurality of magnets are arranged in a plane in the same direction, a table driving unit for relatively rotating the object to be heated and the table, A workpiece support for supporting the object to be heated in the shape of a bar or a bar in a state facing the respective magnets of the table, and relatively rotating and displacing the table and the object to be heated which are arranged to face the respective magnets. A method of heating an object to be heated using an electromagnetic induction heating device that generates an induced current in the object to be heated by heating, wherein the object to be heated is an electromagnetic induction heating device in a process leading to a finished product. A raw material or a semi-finished product that is softened by heating according to the present invention, and at least a part of the outer surface of the object to be heated is a flat portion having a plane parallel to the rotation surface of each of the magnets and a flatness of 5 mm or less The shape A flat portion forming step of, in a result good 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 step even when the flat part does not exist in the object to be heated. The same operation and effect as described above can be expected.

In addition, the method of manufacturing an aluminum wheel includes, specifically, a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a table driving means for relatively rotating the object to be heated and the table. And a workpiece support for supporting a bar-shaped object to be heated, which is a raw material of an aluminum wheel, in a state facing each magnet of the table. A method of manufacturing an aluminum wheel using an electromagnetic induction heating device that generates an induction current in an object to be heated by being rotationally displaced and softens by heating, wherein the object to be heated is at least one of an outer surface. some, plane a and flatness parallel to the plane of rotation of the respective magnets have a flat portion is 5mm or less, the same as opposed to flat portions of the object to be heated in each magnet heating It is sufficient to include a work placement step of placing the elephant was the work support. According to this, the manufacturing method of the aluminum wheel can expect the same operation and effect as the above-mentioned object to be heated and the method of heating the object to be heated.

Further, the heating method of the object to be heated includes a table in which the magnetic poles of the plurality of magnets are arranged in a plane in the same direction, a table driving unit for relatively rotating the object to be heated and the table, A workpiece support for supporting the object to be heated in the shape of a bar or a bar in a state facing the respective magnets of the table, and relatively rotating and displacing the table and the object to be heated which are arranged to face the respective magnets. A method of heating an object to be heated using an electromagnetic induction heating device that generates an induced current in the object to be heated by heating, wherein a portion having the highest flatness of an outer surface of the object to be heated is flattened. According to this, the heating method of the object to be heated may include a workpiece arranging step of arranging the object to be heated on the work support so as to be opposed to each magnet as a unit. The other side of each magnet Compared with the case where the opposed, it is possible to shorten and uniformity of the heating time. In addition, the method of manufacturing an aluminum wheel includes, specifically, a table in which the magnetic poles of a plurality of magnets are arranged in a plane in the same direction, and a table driving means for relatively rotating the object to be heated and the table. And a workpiece support for supporting a bar-shaped object to be heated, which is a raw material of an aluminum wheel, in a state facing each magnet of the table. A method for manufacturing an aluminum wheel using an electromagnetic induction heating device that generates an induced current in an object to be heated by rotating and heating the object to be heated, 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 object on a workpiece | work support so that a high part may be arrange | positioned facing each magnet 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.

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 the same direction in a plane, and a plate-shaped or rod-shaped object to be heated and the table are relatively rotated. A table driving means for driving, and a work support for supporting the object to be heated in a state facing the magnets of the table, and relatively rotating the object to be heated and the table arranged opposite to each magnet. A method of heating an object to be heated using an electromagnetic induction heating device that generates an induced current in the object to be heated by displacing the object and heats the object. 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 surface that is parallel to the rotation surface of each magnet and has a flatness of 5 mm or less. do it Ri 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, in the method of heating the object to be heated, the heating time can be shortened and made uniform as compared with the case where the other surface of the object to be heated is arranged to face each magnet.

Further, the method of heating the object to be heated includes a table in which the magnetic poles of the plurality of magnets are arranged in a plane in the same direction, and a table for relatively rotating the plate-like or rod-like object to be heated and the table. Having a driving means and a work support for supporting the object to be heated in a state facing each magnet on the table, and relatively rotating and displacing the object to be heated and the table arranged opposite to each magnet. A method of heating an object to be heated using an electromagnetic induction heating device that generates an induced current in the object to be heated by heating, wherein the object to be heated is an electromagnetic induction heating device in a process leading to a finished product. A raw material or a semi-finished product that is softened by heating according to the present invention, and at least a part of the outer surface of the object to be heated is a flat portion having a plane parallel to the rotation surface of each of the magnets and a flatness of 5 mm or less The shape A flat portion forming step of, 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 step even when the flat part does not exist in the object to be heated. The same operation and effect as described above can be expected.

In addition, the method of manufacturing an aluminum wheel is, specifically, a table in which the magnetic poles of a plurality of magnets are arranged in the same direction in a plane, and a rod-shaped object to be heated, which is a raw material of the aluminum wheel, and a table. Table driving means for rotationally driving the workpiece, and a work support for supporting the object to be heated in a state facing the respective magnets of the table. A method of manufacturing an aluminum wheel using an electromagnetic induction heating device that generates an induction current in an object to be heated by being rotationally displaced and softens by heating, wherein the object to be heated is at least one of an outer surface. Some of the magnets have a flat surface parallel to the rotation surface of each magnet and have a flatness of 5 mm or less. heating It is sufficient to include a work placement step of placing the elephant was the work support. According to this, the manufacturing method of the aluminum wheel can expect the same operation and effect as the above-mentioned object to be heated and the method of heating the object to be heated.

Further, the method of heating the object to be heated includes a table in which the magnetic poles of the plurality of magnets are arranged in a plane in the same direction, and a table for relatively rotating the plate-like or rod-like object to be heated and the table. Having a driving means and a work support for supporting the object to be heated in a state facing each magnet on the table, and relatively rotating and displacing the object to be heated and the table arranged opposite to each magnet. A method of heating an object to be heated using an electromagnetic induction heating device that generates an induced current in the object to be heated by heating, wherein a portion having the highest flatness of an outer surface of the object to be heated is flattened. What is necessary is just to include the workpiece | work arrangement | positioning process of arrange | positioning the to-be-heated object on a workpiece | work support so that it may oppose each magnet as a part . According to this, in the method of heating the object to be heated, the heating time can be shortened and made uniform as compared with the case where the other surface of the object to be heated is arranged to face each magnet. In addition, the method of manufacturing an aluminum wheel is, specifically, a table in which the magnetic poles of a plurality of magnets are arranged in the same direction in a plane, and a rod-shaped object to be heated, which is a raw material of the aluminum wheel, and a table. Table driving means for rotationally driving the workpiece, and a work support for supporting the object to be heated in a state facing the respective magnets of the table. A method for manufacturing an aluminum wheel using an electromagnetic induction heating device that generates an induced current in an object to be heated by rotating and heating the object to be heated, 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 object on a workpiece | work support so that a high part may be arrange | positioned facing each magnet as a plane part. According to this, the manufacturing method of the aluminum wheel can expect the same operation and effect as the above-mentioned object to be heated and the method of heating the object to be heated.

Claims (9)

An object to be heated which is an object to be heated by the electromagnetic induction heating device,
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. 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,
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. 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,
An object to be heated for an electromagnetic induction heating device, which is formed outside the rough portion. 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 work support that supports a plate-shaped or rod-shaped object to be heated in a state facing each of the magnets of the table, wherein the object to be heated and the table that are arranged to face each of the magnets are opposed to each other; A method for heating the object to be heated using an electromagnetic induction heating device that generates an induced current in the object to be heated by being rotationally displaced and heats the object,
A work placement step of arranging the object to be heated on the work support such that a portion having the highest flatness of the outer surface of the object to be heated is arranged as a flat portion and opposed to the magnets. Characteristic heating method of the object to be heated. In the heating method of the to-be-heated target object described in Claim 4,
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 work placement step includes:
A method for heating an object to be heated, comprising: arranging the object to be heated on the work support such that the plane portion is arranged to face each of the magnets. In the heating method of the to-be-heated target object described in Claim 4,
At least a part of the outer surface of the object to be heated includes a plane portion forming step of forming a plane portion that is a plane parallel to the rotation surface of each magnet and has a flatness of 5 mm or less,
The work placement step includes:
A method for heating an object to be heated, comprising: arranging the object to be heated on the work support such that the plane portion is arranged to face each of the magnets. 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. 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 work support that supports a bar-shaped object to be heated, which is a raw material of an aluminum wheel, in a state facing the magnets of the table; and the object to be heated and the table that are arranged to face the magnets. The method for manufacturing an aluminum wheel using an electromagnetic induction heating device that generates an induced current in the object to be heated by relatively rotating and displacing the object and heats the object,
A work placement step of arranging the object to be heated on the work support such that a portion having the highest flatness of the outer surface of the object to be heated is arranged as a flat portion and opposed to the magnets. A distinctive method of manufacturing aluminum wheels. The method for manufacturing an aluminum wheel according to claim 8,
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 work placement step includes:
A method for manufacturing an aluminum wheel, comprising: arranging the object to be heated on the work support so that the flat portion is arranged to face each of the magnets.

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