JP2000212642A - Heat treatment and formation of preform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat treatment and forming method of a preform, with which the preform having various kinds of complicated shapes can be heated to a uniform temp. SOLUTION: This heat treatment and forming method of the preform is the one, with which the preform 1 formed of a metal-made thin sheet and having complicated shape is heated and the heated preform 1 is press-formed. The preform 1 is disposed by bringing into contact with a pedestal 2 which is formed of a metal having higher heat capacity than the preform 1. The preform 1 and the pedestal 2 are heated by a high-frequency induction heating to conduct the heat from the pedestal 2 to the preform 1. The heat of the pedestal 2 is conducted to a portion A easily radiating the heat in the preform 1 to heat the portion A thus, the heat radiation to the air from this portion A can be supplemented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment for forming by high-frequency induction heating, and more particularly to a method for uniformly heating a heating target having a complicated shape.

[0002]

2. Description of the Related Art When quenching a component having a complex shape formed by punching or bending a thin plate as an object to be heated, release of residual stress at the time of punching or bending is performed. At present, quenching distortion occurs due to transformation stress at the time of martensite transformation, and it is difficult to ensure dimensional accuracy of components. As a method of suppressing the quenching distortion, there is a forming heat treatment in which an external force is applied while the quenching is heated and pressure is formed.

When an electric furnace is used as a heating method for the molding heat treatment, a press for applying an external force must be driven at a high temperature. The oil cannot be used for the sliding portion, and the components constituting the press machine are thermally expanded, so that it is difficult to ensure poor sliding and to ensure accuracy. Therefore, as a method for solving such a problem, a method is employed in which heating for forming heat treatment is performed by high-frequency induction heating or electric current heating, and a press machine for pressure forming is driven at room temperature. I have.

[0004] As a molding heat treatment method as described above, for example, there is a method described in Japanese Patent Publication No. 4-68365. This publication includes a plurality of radial slits 1
FIG. 24A shows a method of manufacturing a disc spring member by forming and heat-treating a plate-shaped disc spring material 101 having a diameter of 00, and as shown in FIG. Of the high-frequency coil 102 while rotating the disc spring material 101 in this state.
By energizing the high-frequency coil 02, the belleville spring material 101 is uniformly subjected to high-frequency dielectric heating by the magnetic flux generated from the high-frequency coil 102, and immediately thereafter, the belleville spring material 101 is molded into a mold as shown in FIG. Pressing and molding at 103.

[0005]

However, the above method can cope with the case where the object to be heated is a disc-shaped part, but cannot cope with the case where the object to be heated is a part having a complicated shape. There was a problem. Further, while the high-frequency induction heating is being performed and the pressure molding is being performed, the object to be heated (the disc spring material 101) is held in the ceramic holder 3.
2, the heat is taken away by the holder 32, and it is difficult to uniformly heat the object to be heated.

The present invention has been made in view of the above points, and has as its object to provide a molding heat treatment method capable of heating an object to be heated having various complicated shapes to a uniform temperature. It is.

[0007]

According to a first aspect of the present invention, there is provided a method of forming and heat-treating a heated object having a complicated shape formed by molding a thin metal plate, and heating the heated object to be heated. In the forming heat treatment method for forming by pressing, a pedestal 2 made of metal and having a higher heat capacity than the heated object 1 is formed, the heated object 1 is placed in contact with the pedestal 2, and the heated object 1 and the pedestal 2 are arranged.
Is heated by high-frequency induction heating, and the object 1 to be heated is
Characterized by conducting heat to the substrate.

According to a second aspect of the present invention, there is provided a molding heat treatment method for heating an object to be heated 1 having a complex shape formed by molding a thin metal plate and press-forming the heated object to be heated 1. In the method, a pedestal 2 having a metal heating portion 3 is formed, the object 1 to be heated is arranged on the pedestal 2, and the heating portion 3 is brought into contact with a portion A of the object 1 where heat is easily radiated. Further, the heat generating section 3 is heated by high-frequency induction heating, and heat is conducted from the heat generating section 3 to a portion A of the object to be heated 1 where heat is easily radiated.

According to a third aspect of the present invention, there is provided a molding heat treatment method for heating an object to be heated 1 having a complicated shape formed by molding a metal thin plate, and press-forming the heated object to be heated 1. In the method, a pedestal 2 having a metal heat-generating portion 3 and a ceramic heat-absorbing portion 4 is formed, the object 1 to be heated is arranged on the pedestal 2, and the heat-generating portion 3 is placed on a portion A of the object 1 where heat is easily radiated. The heat absorbing portion 4 is brought into contact with the portion B of the object 1 to be hardly dissipated, and the object 1 and the heat generating portion 3 are heated by high-frequency induction heating.
Heat is transferred to the part A where heat is easily dissipated and
Is characterized by conducting heat from the portion B where heat is hardly dissipated to the heat absorbing portion 4.

According to a fourth aspect of the present invention, there is provided a molding heat treatment method for heating an object to be heated having a complicated shape formed by molding a thin metal plate, and press-forming the heated object to be heated. In the method, a pedestal 2 having an electrode 5 is formed, the object 1 to be heated is arranged on the pedestal 2, the electrode 5 is brought into contact with a portion A of the object 1 to be easily radiated, and the object 1 is heated by high-frequency induction heating. It is characterized in that it is heated and a current is applied from the electrode 5 to a portion A of the article 1 to be heated where heat is easily radiated to generate heat.

According to a fifth aspect of the present invention, there is provided a molding heat treatment method for heating an object to be heated 1 having a complex shape formed by molding a thin metal plate, and press-forming the heated object to be heated 1. In the method, the pedestal 2 having the air ejection port 6 is formed, the object 1 to be heated is arranged on the pedestal 2, the portion B of the object 1 to which heat is hardly dissipated is opposed to the air ejection port 6, and the object 1 is heated. Heating is performed by high-frequency induction heating, and air is blown from the air blow-out port 6 to a portion B of the object to be heated 1 where heat is hardly dissipated, and is cooled.

According to a sixth aspect of the present invention, there is provided a molding heat treatment method for heating an object to be heated 1 having a complicated shape formed by molding a thin metal plate, and press-forming the heated object to be heated 1. In the method, a pedestal 2 having a core portion 7 made of ferrite is formed, the object 1 to be heated is arranged on the pedestal 2, and the core portion 7 is positioned corresponding to a portion A of the object 1 to be radiated easily. The heating object 1 is heated by high frequency induction heating,
At the time of high-frequency induction heating, the magnetic flux concentrated on the core portion 7 and the heat-dissipating portion A of the heated object 1 causes the heat-dissipating portion A of the heated object 1 to generate heat.

According to a seventh aspect of the present invention, there is provided a molding heat treatment method for heating an object to be heated 1 having a complicated shape formed by molding a metal thin plate, and press-forming the heated object to be heated 1. In the method, a pedestal 2 having a heat-generating portion 3 made of metal, a heat-absorbing portion 4 made of ceramic, and a core portion 7 made of ferrite is formed, and the object 1 to be heated is arranged on the pedestal 2.
The heat-generating part 3 is brought into contact with the part A where heat is easily radiated, and the heat-absorbing part 4 is brought into contact with the part B where heat is hardly radiated,
The core portion 7 corresponds to the portion A of the object 1 to be radiated easily.
Is heated by high-frequency induction heating to heat the object 1 and the heat-generating portion 3 to conduct heat from the heat-generating portion 3 to the portion A where heat is easily dissipated from the heat-generating portion 1 and from the portion B where heat is hardly dissipated. Heat is conducted to the heat absorbing portion 4, and the high-frequency induction heating causes the portion A of the object 1 to be radiated to generate heat with magnetic flux concentrated on the portion A of the object 1 to be radiated easily. It is.

According to an eighth aspect of the present invention, in addition to the configuration of the second aspect, the temperature of the object to be heated 1 is measured, and the temperature of the object to be heated 1 is determined based on the measurement result. It is characterized in that the pedestal 2 is moved with respect to the object to be heated 1 such that the heat generating portion 3 of the pedestal 2 is brought into contact with the lower part.

According to a ninth aspect of the present invention, in addition to the configuration of the third aspect, the temperature of the object to be heated 1 is measured, and the temperature of the object to be heated 1 is determined based on the measurement result. The pedestal 2 is moved with respect to the heated object 1 such that the heat generating portion 3 of the pedestal 2 is brought into contact with a low portion or the heat absorbing portion 4 of the pedestal 2 is brought into contact with a portion where the temperature of the heated object 1 is high. It is characterized by the following.

According to a tenth aspect of the present invention, in addition to the configuration of the fourth aspect, in addition to the configuration of the fourth aspect, the temperature of the object to be heated 1 is measured, and the heat is radiated from the object to be heated 1 based on the measurement result. It is characterized in that the amount of current supply to the portion A that is easy to adjust is adjusted.

According to an eleventh aspect of the present invention, in addition to the configuration of the fifth aspect, the method further comprises the steps of: measuring a temperature of the object to be heated; It is characterized in that the amount of air blown to the difficult part A is adjusted.

According to a twelfth aspect of the present invention, in addition to the configuration of the sixth aspect, the temperature of the object to be heated 1 is measured, and the temperature of the object to be heated 1 is determined based on the measurement result. The pedestal 2 is moved relative to the object 1 to be heated so that the core 7 of the pedestal 2 is positioned corresponding to the low portion.

According to a thirteenth aspect of the present invention, in addition to the configuration of the seventh aspect, the temperature of the object to be heated 1 is measured, and the temperature of the object to be heated 1 is determined based on the measurement result. The heating portion 3 of the pedestal 2 is brought into contact with the lower portion, or the core portion 7 of the pedestal 2 is positioned corresponding to the portion where the temperature of the object 1 is low, or the temperature of the object 1 is high. So that the heat absorbing part 4 of the pedestal 2 contacts the part
The pedestal 2 is moved with respect to the object 1 to be heated.

According to a fourteenth aspect of the present invention, in addition to the configuration of the first aspect, the first coil 8 for heating the object 1 and the pedestal 2 by high-frequency induction heating, And a second coil 9 for heating the object 1 and the pedestal 2 by high-frequency induction heating with the first coil 8 and measuring the temperature of the object 1 to be heated. Based on the measurement result, a part of the pedestal 2 that contacts the low temperature part of the object 1
The second coil 9 is moved relative to the pedestal 2 so as to be heated by the coil 9.

According to a fifteenth aspect of the present invention, in addition to the configuration of the first aspect, the first coil 8 for heating the object to be heated 1 and the pedestal 2 by high-frequency induction heating, And a second coil 9 for heating the base 2 by high-frequency induction heating. The base 2 is heated by the second coil 9 so that a part of the base 2 in contact with a portion A of the object 1 to be radiated easily is heated. 2 and the second coil 9 are arranged, the object 1 and the pedestal 2 are heated by the first coil 8 by high-frequency induction heating, and the temperature of the object 1 is measured. The amount of current supplied to the second coil 9 is adjusted.

According to a molding heat treatment method according to claim 16 of the present invention, in addition to the constitution of claim 1, when the molding heat treatment is continuously applied to a plurality of objects 1 to be heated,
The pre-molding heat treatment unit 10 is integrally formed on the pedestal 2, and the untreated heated object 1 is placed in contact with the pre-molding heat treatment unit 10,
The unprocessed object to be heated 1 and the pre-molding heat treatment unit 10 are heated by high-frequency induction heating for heating the pedestal 2, and heat is conducted from the pre-molding heat treatment unit 10 to the untreated object to be heated 1. is there.

According to a seventeenth aspect of the present invention, in addition to the constitution of the sixteenth aspect, the pedestal 2 having the ferrite core portion 7 and the pre-forming heat treatment portion 10 having the ferrite core portion 7 are provided. Characterized in that at least one of them is used.

According to an eighteenth aspect of the present invention, in addition to the configuration of the first aspect, the method for forming a plurality of objects to be heated 1 is continuously subjected to the forming heat treatment.
A post-molding heat treatment section 11 is integrally formed on the pedestal 2, and the object to be heated 1 after pressure molding on the pedestal 2 is arranged in contact with the post-molding heat treatment section 11, and heated by high-frequency induction heating for heating the pedestal 2. The object to be heated 1 after the pressure molding and the heat treatment part 11 after the molding are heated, and heat is conducted from the heat treatment part 11 after the molding to the object to be heated 1 after the pressure molding.

According to a nineteenth aspect of the present invention, in addition to the constitution of the eighteenth aspect, the pedestal 2 having the ferrite core 7 and the post-forming heat treatment part 11 having the ferrite core 7 are provided. At least one of which is used.

According to a twentieth aspect of the present invention, in addition to the configuration of the first aspect, the method further comprises the step of: 10 and the heat treatment part 11 after molding are integrally formed,
An untreated object to be heated 1 is placed in contact with the pre-molding heat treatment section 10, and the object to be heated 1 that has been press-molded by the pedestal 2 is placed in contact with the post-molding heat treatment section 11 to heat the pedestal 2. The unprocessed heated object 1 and the pre-molding heat treatment unit 10 and the heated object 1 after pressure molding and the post-molding heat treatment unit 11 are heated by induction heating, and the unprocessed heated object 1 is converted from the pre-molding heat treatment unit 10 to the unprocessed heated object 1. It is characterized by conducting heat and conducting heat from the post-molding heat treatment section 11 to the heated article 1 after pressure molding.

According to a twenty-first aspect of the present invention, in addition to the constitution of the twentieth aspect, the pedestal 2 having the ferrite core 7 and the pre-forming heat treatment part 10 having the ferrite core 7 are provided. And at least one of a post-molding heat treatment section 11 having a core section 7 made of ferrite.

[0028]

Embodiments of the present invention will be described below.

FIG. 2 shows an example of the object to be heated 1 to which the present invention is applied. The object to be heated 1 is used as a shaver blade or the like, and is formed by punching or bending a conductive metal thin plate such as a stainless steel plate. Specifically, the side plate 21 is provided on both sides of the rectangular plate-shaped slit portion 20 so as to oppose each other along the longitudinal direction. A notch 2 is provided at a substantially central portion of the side piece 21 and opens downward.
4 are formed. The object to be heated 1 has a length L
Is 40 mm, the width W is 2 mm, the height H is 10 mm, and the plate thickness is 0.3 mm.
The shape and size of the object to be heated 1 are not limited to the above. Then, the edge of the punched portion 23 is formed as a blade portion, and the beard is cut at this edge.

There is a case in which distortion (heat treatment distortion) occurs during the punching process and the bending process in such an object 1 to be heated. High flatness (flatness) is required for the slit portion 20. Therefore, the distortion of the object 1 to be heated, particularly the distortion of the slit portion 20 is reduced by performing the molding heat treatment of the present invention.

The molding heat treatment method of the present invention is shown in FIG.
As shown in (a) to (c), the process is performed using the pedestal 2 used as the lower die, the pressing jig 30 used as the upper die, the coil 8, and the like. The pedestal 2 includes a support 26 and a base 25.
The base 2 is formed in a substantially inverted T-shape in cross section and has a rectangular plate shape.
A support portion 26 is provided upright on the upper surface of the upper surface 5 over the entire length in the longitudinal direction. The support portion 26 is formed to be longer than the length of the object 1 to be heated. The width dimension (dimension in the transverse direction) of the support portion 26 is substantially the same as the dimension between the opposing side pieces 21 of the article 1 to be heated. The pedestal 2 is formed of a metal material having high strength and conductivity at a high temperature, and for example, a carbide stainless steel can be used. Further, the pedestal 2 has a higher heat capacity than the object 1 to be heated, and has a heat capacity 4 to 5 times that of the object 1 to be heated, depending on the shape of the object 1 to be heated.

The pressing jig 30 has a substantially inverted T-shaped cross section.
The pedestal 2 is formed of substantially the same material as the pedestal 2 and has substantially the same length. The lower surface of the pressing jig 30 is formed as a flat pressing surface 27. The coil 8 is formed of a conductive metal material such as copper, and has a pair of opposed main magnetic flux generating portions 29.
And a connecting portion 31 formed between one ends of the main magnetic flux generating portion 29, and is formed in a substantially U-shape in plan view. The main magnetic flux generator 29 is connected to a high frequency power supply 32 for energizing the coil 8.

In this embodiment, the molding heat treatment is performed as follows. First, the space between the side pieces 21 of the article 1 to be heated is inserted into the support portion 26 of the pedestal 2 from the upper side.
The object to be heated 1 is arranged on the pedestal 2 as shown in FIG. When the object to be heated 1 is arranged on the pedestal 2 in this manner, the object to be heated 1
The surface to be subjected to the forming heat treatment and the surface to be quenched, that is, the lower surface of the slit portion 20 contacts the upper surface of the support portion 26 of the pedestal 2 and the inner surface of the side piece 21 is the side surface of the support portion 26 of the pedestal 2 Contact 1 (b) and 1 (c)
As shown in FIG. 5, the coil 8 is arranged outside the side piece 21 of the article 1 to be heated such that the article 1 to be heated and the support 26 of the pedestal 2 are located between the pair of main magnetic flux generating sections 29. At this time, the upper surface of the slit portion 20 of the article to be heated 1 and the upper surface of the coil 8 are substantially at the same height.

Next, by supplying power to the coil 8 from the high-frequency power supply 32, a magnetic flux a is generated, and the object 1 and the pedestal 2 are heated by high-frequency induction heating and are simultaneously heated (FIG. 8 shows the direction of the magnetic flux a when the current flows in the direction of arrow A). That is, the coil 8
To generate magnetic flux a, an overcurrent is generated in a plane perpendicular to the magnetic flux a, and this current causes the object 1 to be heated and the pedestal 2 to generate heat. After the object to be heated 1 and the pedestal 2 are heated to a predetermined temperature in this manner, the pressing surface 27 of the pressing jig 30 is brought into contact with the upper surface of the slit portion 20 of the object to be heated 1, and By pressing the slit portion 20 between the upper surface of 26) and the pressing surface 27 of the pressing jig 30 and applying pressure, the upper surface of the slit portion 20 is press-formed so that the upper surface of the slit portion 20 becomes flat. Reduce heat distortion. After this,
The pressing by the pressing jig 30 is released. In this way, the object to be heated 1 can be subjected to the forming heat treatment. The conditions for the forming heat treatment differ depending on the size and material of the object 1 to be heated and the positional relationship between the coil 8 and the object 1 to be heated.
For example, in the case of the heating target 1 made of stainless steel and having the size shown in FIG.
At 0 kHz, the effective value of the current can be about 100A. The temperature of the object 1 can be heated to around the Ms point (temperature at which lattice transformation to martensite starts) of stainless steel, or to about 300 ° C. The proof stress of the material (about 55 kg for stainless steel)
f / mm ² ) or less (for example, about 30 kgf / m
m ² ). By performing the forming heat treatment under these conditions, the heat treatment distortion of the article to be heated 1 can be reduced.

The object to be heated 1 as shown in FIG. 2 has a plurality of punched portions 23 provided in the slit portion 20,
The notch 2 is formed in the side piece 21 at a substantially central portion of the slit portion 20.
Since the heating target 1 is independently heated by high-frequency induction heating since it has a complicated shape, for example, the ratio of heating and heat radiation differs depending on each part of the heating target 1. As a result, the temperature of the object to be heated 1 cannot be made uniform throughout. That is, in the object 1 to be heated in FIG. 2, the amount heated by the high-frequency induction heating is substantially constant throughout, but there are a portion A where heat is easily dissipated and a portion B where heat is hardly dissipated. Therefore, it is considered that a temperature difference occurs between the portion A where heat is easily radiated and the portion B where heat is hardly radiated during heating. Specifically, a substantially central portion of the object 1 to be heated (a substantially central portion of the slit portion 20 and a notch 2 of the side piece 21)
2 is a portion B that is difficult to dissipate heat, and the other portion is a portion A that easily dissipates heat.

Therefore, in this embodiment, a pedestal 2 having a simpler shape and a higher heat capacity than the object 1 to be heated is used, and a portion A of the object 1 to be radiated easily is brought into contact with the pedestal 2 so that the pedestal 2 is covered. Heating is performed by high-frequency induction heating together with the heating object 1, whereby heat of the pedestal 2 is conducted to the portion A where heat is easily radiated, and the heat is radiated into the air from the portion A where heat is easily radiated. The heat can be supplemented, and the temperature difference between the portion A where heat is easily dissipated and the portion B where heat is hardly dissipated becomes small regardless of the difference between the amount of heat generated by the object 1 itself and the amount of heat radiation of the object 1. The whole object 1 (especially the slit portion 20) can be heated to a uniform temperature. Since the object to be heated 1 can be heated to a uniform temperature over the entire object, uniform heat treatment and quenching can be performed on the entire object to be heated 1 and the slit portion 20, and variations in hardness and structure can be achieved. It is possible to obtain high quality parts with less quality. In addition, since the object to be heated 1 is heated by conducting heat from the pedestal 2 to the object to be heated 1, a uniform temperature is applied to the object to be heated 1 (for example, stainless steel) which is unlikely to generate heat by high-frequency induction heating. Which can be heated to Moreover, in the present invention, the object to be heated 1
By changing the shape of the pedestal 2 in accordance with the shape of the pedestal 2 and bringing the pedestal 2 into contact with the portion A where heat is easily radiated, the object 1 having various complicated shapes can be heated to a uniform temperature.

FIG. 3 shows another embodiment. The object to be heated 1 of this embodiment is formed in a manner similar to that of FIG. The pedestal 2 includes a base 35 formed of a ceramic material in the shape of a square bar, and a pair of heat generating portions 3 formed of a metal material. The heat generating parts 3 are arranged in the longitudinal direction of the base 35, and each heat generating part 3 is provided on the outer surface of the base 35 over the entire circumference. The heat generating portion 3 protrudes from the surface of the base 35 by the thickness thereof. Further, the interval between the heat generating portions 3 is formed to be substantially the same as the length of the object 1 to be heated.
The heat capacity of the pedestal 2 and the heat capacity of the heat generating portion 3 of the pedestal 2 are formed higher than the heat capacity of the object 1 to be heated. Base 35
Is preferably formed of silicon nitride or the like so that the strength does not decrease even at high temperatures. The heat generating portion 3 is formed of a metal material having high strength and conductivity at high temperature, and for example, a super hard stainless steel can be used.

In this embodiment, the molding heat treatment is performed as follows. First, as shown in FIG. 3A, the space between the side pieces 21 of the article 1 to be heated is inserted into the pedestal 2 from above, and the article 1 to be heated is arranged on the pedestal 2 as shown in FIG. When the object to be heated 1 is thus arranged on the pedestal 2, the lower surface of the slit portion 20 contacts the upper surface of the pedestal 2 and the inner surface of the side piece 21 contacts the heat generating portion 3. That is, the heated object 1
The inner surface of only the portion A where heat is easily dissipated contacts the outer surface of the heat generating portion 3 of the pedestal 2, and the portion B of the object to be heated 1 where heat is hardly dissipated is arranged so as not to contact the pedestal 2. FIG. 1 (b)
Similarly to (c), the coil 8 is arranged so that the object 1 and the pedestal 2 are located between the pair of main magnetic flux generating sections 29.

Next, similarly to FIG. 1B, a magnetic flux a is generated by supplying power to the coil 8 from the high frequency power supply 32, and only the heating target 1 and the heat generating portion 3 of the pedestal 2 are simultaneously heated by high frequency induction heating. I do. The object to be heated 1
After the heating unit 3 is heated to a predetermined temperature, the slit 20 is pressed by the pressing jig 30 in the same manner as in FIG. In this way, the object to be heated 1 can be subjected to the forming heat treatment.

As described above, the object 1 to be heated as shown in FIG.
Has a portion A where heat is easily dissipated and a portion B where heat is hardly dissipated, and the amount of heat dissipated is different in each portion.
Therefore, in this embodiment, only the portion A of the pedestal 2 where heat is easily radiated is brought into contact with the heating portion 3 of the pedestal 2, and the heating portion 3 of the pedestal 2 is heated together with the object 1 by high-frequency induction heating. The heat from the heat generating portion 3 is conducted only to the portion A where the heat is easily radiated, so that the heat radiated from the portion A where the heat is easily radiated by the heat conducted from the heat generating portion 3 is compensated. Thus, the temperature difference between the portion A where heat is easily dissipated and the portion B where heat is hardly dissipated is reduced, so that the entire heated object 1 (particularly, the slit portion 20) can be heated to a uniform temperature.

FIG. 4 shows another embodiment. The object to be heated 1 of this embodiment is formed in a manner similar to that of FIG. The pedestal 2 includes a heat absorbing section 4 formed of a ceramic material and a heat generating section 3 formed of a metal material. The heat absorbing portion 4 is formed in a square rod shape at a substantially central portion of the pedestal 2, and the heat generating portions 3 are integrally provided at both ends of the heat absorbing portion 4. Therefore, the pedestal 2 is formed with the heat absorbing portion 4 sandwiched between the heat generating portions 3. The surface of the heat generating section 3 and the surface of the heat absorbing section 4 are formed flush. Base 2
The length of the heat absorbing portion 4 in the longitudinal direction is substantially the same as the length of the cutout portion 24, that is, the portion B in which the object 1 hardly dissipates heat. The heat capacity of the pedestal 2 and the heat capacity of the heat generating portion 3 of the pedestal 2 are formed higher than the heat capacity of the object 1 to be heated.

In this embodiment, the molding heat treatment is performed as follows. First, as shown in FIG. 4A, the space between the side pieces 21 of the article 1 to be heated is inserted into the pedestal 2 from above, and the article 1 to be heated is arranged on the pedestal 2 as shown in FIG.
When the object to be heated 1 is arranged on the pedestal 2 in this manner, the lower surface of the slit portion 20 contacts the upper surface of the pedestal 2 and the side piece 21
Contact the heat generating portion 3. That is, the inner surface of the portion A of the heated object 1 where heat is easily dissipated contacts the outer surface of the heat generating portion 3 of the pedestal 2, and the inner surface of the portion B of the heated object 1 where heat is hardly dissipated is the heat absorbing portion 4.
Is placed in contact with the outer surface of the. Also, as in FIGS. 1B and 1C, the coil 8 is arranged so that the object 1 and the pedestal 2 are located between the pair of main magnetic flux generators 29.

Next, as shown in FIG. 1B, a magnetic flux a is generated by supplying power to the coil 8 from the high frequency power supply 32, and only the heating target 1 and the heat generating portion 3 of the pedestal 2 are simultaneously heated by high frequency induction heating. I do. At this time, the heat absorbing portion 4 of the pedestal 2
Has no conductivity and does not generate heat due to high-frequency induction heating.
After heating the heating target 1 and the heat generating portion 3 of the pedestal 2 to a predetermined temperature in this manner, pressure forming is performed on the slit portion 20 with the pressing jig 30 in the same manner as in FIG. The heat treatment distortion of the heating object 1 is reduced. In this way, the object to be heated 1 can be subjected to the forming heat treatment.

In this embodiment, a pedestal 2 is formed by providing a heat absorbing portion 4 that does not generate heat by high-frequency induction heating and a heat generating portion 3 that generates heat, and the heat generating portion 3 of the pedestal 2 has a portion A where heat is easily radiated from the object 1 to be heated. And the heat absorbing portion 4 of the pedestal 2 is brought into contact with only the portion B of the object 1 to be hardly dissipated, and the heating portion 3 of the pedestal 2 is heated together with the object 1 by high-frequency induction heating. Heating part 3 only in part A where heat is easily radiated
And heat is transmitted from the heat-generating portion 3 and the heat-absorbing portion 4 having a lower temperature than the heated object 1 without conducting heat from the high-frequency induction heating. The heat dissipated from the heat dissipating portion 3 can be compensated for by the heat dissipated from the heat dissipating portion A, and can be dissipated from the heat dissipating portion B to the heat absorbing portion 4. The temperature difference in the hard part B becomes small, and the whole of the object to be heated 1 (particularly, the slit portion 20) can be heated to a uniform temperature.

FIG. 5 shows another embodiment. The object to be heated 1 of this embodiment is formed in a manner similar to that of FIG. The pedestal 2 has a rectangular rod-shaped base 35 formed of a conductive metal material such as cemented stainless steel, and a ceramic insulator 37 such as silicon nitride is provided over the entire surface of the base 35. The three electrodes 5 are provided on the surface of the insulator 37 on the surface in such a manner that they are arranged side by side in the longitudinal direction of the base 35 and at one end of the base 35 the electrodes 5 provided on both sides are connected by connection wires 39. I have. The heat capacity of the pedestal 2 is formed higher than the heat capacity of the object 1 to be heated. Further, the electrode 5 can be formed of a conductive metal material such as copper.

In this embodiment, the molding heat treatment is performed as follows. First, the space between the side pieces 21 of the article 1 to be heated is inserted into the pedestal 2 from above, and the article 1 to be heated is arranged on the pedestal 2 as shown in FIG. When the object to be heated 1 is arranged on the pedestal 2 in this manner, the lower surface of the slit portion 20 contacts the upper surface of the pedestal 2 and the side piece 2 as shown in FIG.
1 is in contact with the side of the pedestal 2 and the middle electrode 5
Are located in the cutouts 24 of the article 1 to be heated and contact the side pieces 21, and the electrodes 5 at both ends are located outside the ends of the article 1 to be heated and contact the side pieces 21. In this way, a circuit is formed by the electrode 5 and the object 1 to energize a part of the object 1 to be heated. Further, as in FIGS. 1B and 1C,
The coil 8 is arranged so that the article 1 to be heated and the pedestal 2 are located between the pair of main magnetic flux generating sections 29.

Next, similarly to FIG. 1B, a magnetic flux a is generated by supplying power to the coil 8 from the high frequency power supply 32, and the object 1 and the pedestal 2 are simultaneously heated by high frequency induction heating. A high-frequency power supply 32 for high-frequency induction heating is connected in parallel with the coil 8 to the electrode 5 not connected by the connection line 39 to supply power to the electrode 5 and to connect the heating target 1 from the electrode 5.
By energizing the side piece 21 (shown by an arrow a),
The side piece 21 is heated by generating heat by energization. After heating the object 1 and the pedestal 2 to a predetermined temperature in this manner,
1 (c), a slit 20 is formed by a pressing jig 30.
To reduce the heat treatment distortion of the article to be heated 1. In this way, the object to be heated 1 can be subjected to the forming heat treatment.

In this embodiment, the object to be heated 1 and the pedestal 2 are simultaneously heated by high-frequency heating, and the heat of the heated pedestal 2 is transferred to the object to be heated 1 and heated. Since the side piece 21 which is the portion A where heat is easily radiated is energized from the electrode 5 to heat the side piece 21 and is heated, the heat radiated from the portion A where heat is easily radiated into the air is generated by energization. The temperature difference between the portion A where heat is easily dissipated and the portion B where heat is hardly dissipated can be reduced by heat, so that the entire heated object 1 (especially the slit portion 20) can be heated to a uniform temperature. . This embodiment is effective for an object to be heated 1 having a complicated shape which is difficult to be heated only by heat conduction from the pedestal 2. In addition, since the high-frequency power supply 32 for high-frequency induction heating is also used as a power supply for supplying power to the electrode 5, there is no need to separately prepare a power supply for supplying power to the electrode 5, and the apparatus used for the molding heat treatment can be simplified and downsized. Can be achieved.

FIG. 6 shows another embodiment. The object to be heated 1 of this embodiment is formed in a manner similar to that of FIG. The pedestal 2 is formed in a rectangular rod shape from a conductive metal material such as cemented carbide stainless steel, and a recess 40 is provided substantially at the center of the side surface of the pedestal 2. A plurality of air outlets 6 are formed in the recess 40. An air passage communicating with the air outlet 6 is provided inside the pedestal 2, and a compressor is connected to the air passage.
Therefore, the air is supplied from the compressor to the air outlet 6 through the air flow path, and the air can be blown from the air outlet 6. Further, the heat capacity of the pedestal 2 is formed higher than the heat capacity of the object 1 to be heated.

In this embodiment, the molding heat treatment is performed as follows. First, as shown in FIG. 6A, the space between the side pieces 21 of the object to be heated 1 is inserted into the pedestal 2 from above, and the object to be heated 1 is arranged on the pedestal 2. When the object to be heated 1 is arranged on the pedestal 2 in this way, as shown in FIG.
Except for the point 0, the lower surface of the slit portion 20 contacts the upper surface of the pedestal 2, and the inner surface of the side piece 21 contacts the side surface of the pedestal 2 on both sides of the concave portion 40. That is, the inner surface of the portion A of the heated object 1 where heat is easily radiated is in contact with the outer surface of the pedestal 2, and the inner surface of the portion B of the heated object 1 where heat is hardly radiated is positioned corresponding to the recess 40 so as not to contact the pedestal 2. Placed in Further, similarly to FIGS. 1B and 1C, the coil 8 is arranged so that the object 1 and the pedestal 2 are located between the pair of main magnetic flux generation units 29.

Next, similarly to FIG. 1B, a magnetic flux a is generated by supplying power to the coil 8 from the high frequency power supply 32, and the object 1 and the pedestal 2 are simultaneously heated by high frequency induction heating. At the same time as heating, air is blown out from the air blow-out port 6, and the blown-out air is blown onto a portion B of the object to be heated 1 where heat is hardly dissipated to be cooled. After heating the object to be heated 1 and the pedestal 2 to a predetermined temperature in this manner,
As in the case of (c), the slit 20 is subjected to pressure molding by the pressure jig 30 to reduce the heat treatment distortion of the object 1 to be heated. In this way, the object to be heated 1 can be subjected to the forming heat treatment.

In this embodiment, the object 1 and the pedestal 2 are simultaneously heated by high-frequency heating, and the heat of the heated pedestal 2 is conducted to the object 1 to be heated. Since air is blown to the part B where heat radiation is difficult,
The portion B of the object to be heated 1 where heat is hardly dissipated can be cooled by air, and the temperature difference between the portion A where heat is easily dissipated and the portion B where heat is hardly dissipated is reduced, so that the entire object to be heated 1 (especially the slit portion 20) is reduced. It can be heated to a uniform temperature.

In this embodiment, the temperature of the blown-out air may be lower than the temperature of the portion B of the article 1 to be heated which is difficult to dissipate heat, but the length is adjusted by devising the air flow path in the pedestal 2. By doing so, the temperature of the blown air can be adjusted. That is, if the air flow path is formed long in the pedestal 2, the air passes through the pedestal 2 heated to a high temperature for a long time, and the temperature of the air blown out from the ejection port 6 becomes high. If the air flow path is formed short within the pedestal 2, the air passes through the pedestal 2 heated to a high temperature in a short time, and the temperature of the air blown out from the blowout port 6 can be lowered. In a method of cooling a part of the pedestal 2 at a low temperature and bringing the low temperature part into contact with the part B of the object 1 to be hardly dissipated, cooling must be performed so that the low temperature part always has a low temperature. However, when mass-producing components, it is difficult to always keep a low temperature portion at a low temperature. However, in this embodiment, since air is used, it is easy to control the temperature to be low, and it is not necessary to cool a part of the pedestal 2. It's easy to do.

FIG. 7 shows another embodiment. The object to be heated 1 of this embodiment is formed in a manner similar to that of FIG. The pedestal 2 is composed of a base 35 formed in a square rod shape from a conductive metal material such as cemented stainless steel, and a pair of core portions 7 formed from a ferrite material.
The cores 7 are arranged (interiored) in the longitudinal direction of the base 35, and the interval between the cores 7 is formed to be substantially the same as the length of the object 1 to be heated. The surface of the core 7 and the surface of the base 35 are flush with each other. The heat capacity of the pedestal 2 is higher than the heat capacity of the object 1 to be heated.

In this embodiment, the molding heat treatment is performed as follows. First, as shown in FIG. 7A, the space between the side pieces 21 of the object to be heated 1 is inserted into the pedestal 2 from above, and the object to be heated 1 is arranged on the pedestal 2. When the object to be heated 1 is thus arranged on the pedestal 2, the lower surface of the slit portion 20 contacts the upper surface of the pedestal 2 and the side piece 2 as shown in FIG.
1 contacts the core portion 7. That is, the portion A of the object 1 to be radiated easily is arranged at a position corresponding to the core portion 7. Further, similarly to FIGS. 1B and 1C, the coil 8 is arranged so that the object 1 and the pedestal 2 are located between the pair of main magnetic flux generation units 29.

Next, as in FIG. 1B, the magnetic flux a is generated by supplying power to the coil 8 from the high frequency power supply 32, and the object to be heated 1 and the pedestal 2 are simultaneously heated by high frequency induction heating. After the heated object 1 and the pedestal 2 are heated to a predetermined temperature in this manner, the slit 20 is subjected to pressure molding with the pressing jig 30 in the same manner as in FIG.
Heat treatment distortion. In this way, the object to be heated 1 can be subjected to the forming heat treatment.

In this embodiment, since the core portion 7 is provided at a position corresponding to the portion A where heat is easily radiated from the object 1 to be heated, as shown in FIG. It can be generated intensively in the core 7 (when the frequency of the current of the coil 8 is 400 kHz, the core 7
Has a magnetic flux density several hundred times higher than the location where no
The portion A of the object 1 to be radiated easily by the magnetic flux a and the metal portion of the pedestal 2 that comes into contact therewith are more likely to be heated than the portion B of the object 1 that is hard to radiate heat and the metal portion of the pedestal 2 that comes into contact therewith. Become. That is, the portion 2 of the object 1 to be radiated heats the portion A of the object 1 to be radiated more easily than the portion B of the object to be radiated.
Can be heated by increasing heat conduction from the metal portion to the portion A where heat is easily dissipated, and the temperature difference between the portion A where heat is easily dissipated and the portion B where heat is hardly dissipated is reduced, so that the entire heated object 1 (especially the slit) Part 20) can be heated to a uniform temperature. The core material 7 made of a ferrite material does not have high strength and is not easily used for the pedestal 2 for pressure molding. However, it can be reinforced by combining with the metal base 35, By appropriately changing the size of 7, the amount of concentrated magnetic flux can be changed, and the amount of heating of the object to be heated 1 can be controlled. As for the ferrite material, it is more efficient to use a material having a small decrease in magnetic permeability at a frequency used for high-frequency induction heating.

FIG. 8 shows another embodiment. The object to be heated 1 of this embodiment is formed in a manner similar to that of FIG. The pedestal 2 includes a heat absorbing portion 4 formed of a ceramic material, a pair of heat generating portions 3 formed of a metal material, and a pair of core portions 7 formed of a ferrite material. Heat absorbing part 4
Is formed at a substantially central portion of the pedestal 2 and formed in the shape of a square bar. The heat generating portions 3 are integrally provided on both sides of the heat absorbing portion 4. Therefore, the pedestal 2 is provided between the heat generating portion 3 and the heat absorbing portion 4.
Is formed. In addition, the core part 7 includes each heat generating part 3.
Are provided one by one (interior), and are arranged in the longitudinal direction of the pedestal 2. Therefore, the heat absorbing portion 4 is sandwiched between the core portions 7, and the core portion 7 and the heat absorbing portion 4 are sandwiched between the heat generating portions 3. The interval between the core portions 7 is formed to be substantially the same as the length of the object 1 to be heated. The surface of the heat generating part 3, the surface of the heat absorbing part 4, and the surface of the core part 7 are flush with each other. Further, the length of the heat absorbing portion 4 in the longitudinal direction of the pedestal 2 is formed to be substantially the same as the length of the cutout portion 24, that is, the portion B in which the object to be heated 1 is difficult to radiate heat. The heat capacity of the pedestal 2 and the heat capacity of the heat generating portion 3 of the pedestal 2 are formed higher than the heat capacity of the object 1 to be heated.

In this embodiment, the molding heat treatment is performed as follows. First, as shown in FIG. 8A, the space between the side pieces 21 of the article 1 to be heated is inserted into the pedestal 2 from above, and the article 1 to be heated is arranged on the pedestal 2 as shown in FIG.
When the object to be heated 1 is arranged on the pedestal 2 in this manner, the lower surface of the slit portion 20 contacts the upper surface of the pedestal 2 and the side piece 21
Contact the heat generating portion 3 and the core portion 7. In other words, the inner surface of the portion A of the heated object 1 where heat is easily dissipated is
And the inner surface of the portion B of the object to be heated 1 where heat is hardly dissipated contacts the outer surface of the heat absorbing portion 4, and the portion A of the object to be heated 1 where heat is easily dissipated is disposed at a position corresponding to the core portion 7. . Also, as in FIGS. 1B and 1C, the coil 8 is arranged so that the object 1 and the pedestal 2 are located between the pair of main magnetic flux generators 29.

Next, similarly to FIG. 1B, a magnetic flux a is generated by supplying power to the coil 8 from the high frequency power supply 32, and only the heating target 1 and the heating section 3 of the pedestal 2 are simultaneously heated by high frequency induction heating. I do. At this time, the heat absorbing portion 4 of the pedestal 2
Has no conductivity and does not generate heat due to high-frequency induction heating.
After heating the heating target 1 and the heat generating portion 3 of the pedestal 2 to a predetermined temperature in this manner, pressure forming is performed on the slit portion 20 with the pressing jig 30 in the same manner as in FIG. The heat treatment distortion of the heating object 1 is reduced. In this way, the object to be heated 1 can be subjected to the forming heat treatment.

In this embodiment, the pedestal 2 is formed by providing the heat absorbing portion 4 which does not generate heat by the high frequency induction heating, the heat generating portion 3 which generates heat, and the core portion 7 for concentrating magnetic flux.
Only the portion A of the object 1 to which heat is easily dissipated is brought into contact, and only the portion B of the object 1 to which heat is hardly dissipated contacts the heat absorbing portion 4 of the pedestal 2. It is arranged at a position corresponding to the core portion 7, heats the heat generating portion 3 of the pedestal 2 together with the object 1 to be heated by high-frequency induction heating, and conducts heat from the heat generating portion 3 only to the portion A of the object 1 where heat is easily radiated. The heat generated by the high-frequency induction heating is transferred to the heat-generating portion 3 and the heat-absorbing portion 4 having a lower temperature than the heated object 1 without conducting heat. Since the heat is generated in a concentrated manner in the core portion 7, the heat radiated from the portion A where heat is easily radiated by the heat conducted from the heat generating portion 3 can be supplemented and the heat is radiated from the portion B where heat is hardly radiated to the heat absorbing portion 4. Can escape, and Flux a passing concentrated in A section 7
As a result, the portion A of the object 1 to be radiated easily heats more than the portion B of the object 1 to which heat is hardly dissipated. Can be heated by increasing the heat conduction, and the temperature difference between the portion A where heat is easily dissipated and the portion B where heat is hardly dissipated is reduced, so that the entire heated object 1 (especially the slit portion 20) is heated to a uniform temperature. Is what you can do.

FIG. 9 shows another embodiment. In this embodiment, in the embodiment shown in FIG. 3, the thermometer 40 measures a portion of the object 1 to be heated which is desired to have a uniform temperature, that is, the temperature of the slit portion 20. The thermometer 40 is disposed above the object 1 to be heated arranged on the pedestal 2, and may be a non-contact type such as an infrared sensor capable of measuring the temperature of a small area. The thermometer 40 is movably formed above the slit section 20 by being mounted on a uniaxial drive table or the like. The pedestal 2 is formed to be movable with respect to the object 1 to be heated in the longitudinal direction of the pedestal 2 by, for example, being mounted on a uniaxial drive table.

In this embodiment, the molding heat treatment is performed in the same manner as in FIG. 3, but as shown in FIG. 9B, during or after heating by high-frequency induction heating, the thermometer 40 is used. The temperature of the slit section 20 of the heating object 1 is measured, and based on the measurement result, the pedestal 2 is moved so that the slit section 20 has a uniform temperature and heated by heat conduction. That is, first, the temperature of the slit section 20 of the article 1 to be heated is measured by the thermometer 40, and the slit section 20 is measured based on the measurement result.
The low temperature part is detected in. Next, the pedestal 2 is moved in the longitudinal direction with respect to the object 1 to be heated in order to heat the low-temperature portion of the slit portion 20 by the heating portion 3 of the pedestal 2 more than other high-temperature portions. The movement amount is determined based on the detection result. Next, the pedestal 2 is moved with respect to the article 1 to be heated, so that the heating section 3 of the pedestal 2 is brought into contact with the low-temperature portion of the article 1 to be heated. Let it. Thus, the slit portion 20
Is made uniform, the temperature is maintained for a certain period of time, and then pressure molding (press molding) is performed to perform a molding heat treatment.

In this embodiment, the temperature of the slit portion 20 (the portion to be heated to a uniform temperature) of the heated object 1 is measured, and based on the measurement result, the temperature of the heated object 1 The pedestal 2 is moved with respect to the object 1 to be heated in order to adjust the amount of heating of 2 to be heated.
Can be precisely heated to a uniform temperature. As a method of measuring the temperature, the entire surface of the slit section 20 may be captured by a camera and the temperature distribution thereof may be measured.

FIG. 10 shows another embodiment. In this embodiment, in the embodiment shown in FIG. 4, the temperature of the portion to be heated 1 to be made uniform, that is, the temperature of the slit portion 20 is measured by the thermometer 40. The thermometer 40, the method of moving the same, the method of moving the pedestal 2, and the like are the same as those in FIG. In this embodiment, the forming heat treatment is performed in the same manner as in FIG. 4, but as shown in FIG. 10B, during or after heating by high-frequency induction heating, the thermometer 40 heats the object 1 to be heated. The temperature of the slit portion 20 is measured, and based on the measurement result, the pedestal 2 is moved so that the slit portion 20 has a uniform temperature and heated by heat conduction. That is, first, the temperature of the slit portion 20 of the article 1 to be heated is measured by the thermometer 40, and the low temperature portion and the high temperature portion in the slit portion 20 are detected from the measurement result. Next, in order to heat the low temperature portion of the slit portion 20 at the heat generating portion 3 of the pedestal 2 more than the other high temperature portion, or to heat the high temperature portion of the slit portion 20 at the heat absorbing portion 3 of the pedestal 2 than the other low temperature portion. In order to absorb heat, the pedestal 2 is moved in the longitudinal direction with respect to the object 1 to be heated, and the moving direction and the moving amount are determined based on the detection result. Next, the pedestal 2 is moved with respect to the article 1 to be heated, so that the heating section 3 of the pedestal 2 is brought into contact with the low-temperature portion of the article 1 to be heated. Let it. Alternatively, the pedestal 2 is moved with respect to the object to be heated 1 so that the heat absorbing portion 4 of the pedestal 2 is brought into contact with the high temperature portion of the object to be heated 1, and heat is conducted from the high temperature portion to the heat absorbing portion 4. In this way, the temperature of the slit portion 20 is made uniform, and after maintaining the temperature for a certain period of time, pressure molding (press molding) is performed to perform a molding heat treatment.

In this embodiment, the temperature of the slit portion 20 (the portion to be heated to a uniform temperature) of the object 1 to be heated is measured, and based on the measurement result, the temperature of the object 1 to be heated by heat conduction from the pedestal 2 is measured. In other words, the low-temperature portion of the slit portion 20 is heated by heat conduction from the heating portion 3 of the pedestal 2 or the pedestal 2 from the high-temperature portion of the slit portion 20 is adjusted.
In order to absorb heat by heat conduction to the heat absorbing portion 4, the pedestal 2
Is moved with respect to the object 1 to be heated, and the low-temperature portion of the slit portion 20 is heated by the pedestal 2, so that the entire object to be heated 1 (particularly, the slit portion 20) can be accurately heated to a uniform temperature. It is.

FIG. 11 shows another embodiment. In this embodiment, in the embodiment shown in FIG. 5, the temperature of a portion of the object 1 to be heated to be made uniform, that is, the temperature of the slit section 20 is measured by the thermometer 40. A thermometer 40 and a method of moving the thermometer 40 are the same as those in FIG. . In this embodiment, the molding heat treatment is performed in the same manner as in FIG. 5, but as shown in FIG. Measure the temperature of the slit section 20 of the object 1,
Based on the measurement result, the amount of electricity to the electrode 5 is adjusted so that the slit section 20 has a uniform temperature, and auxiliary heating is performed.
That is, first, the slit portion 20 of the object 1 to be heated is measured by the thermometer 40.
Is measured, and a low temperature portion is detected in the slit section 20 from the measurement result. In most cases, the low-temperature portion is generated in a portion A of the article to be heated 1 where heat is easily radiated. next,
An auxiliary heating amount for heating the low-temperature portion of the slit portion 20 by applying heat to the low-temperature portion is determined, and a resistance value of the variable resistor 41 is determined to be the auxiliary heating amount. Next, the amount of current flowing in the circuit is controlled by changing the resistance value of the variable resistor 41, and the object to be heated 1 is heated to heat a low temperature portion. In this way, the temperature of the slit portion 20 is made uniform, and after maintaining the temperature for a certain period of time, pressure molding (press molding) is performed to perform a molding heat treatment.

In this embodiment, the temperature of the slit portion 20 (the portion to be heated to a uniform temperature) of the object 1 to be heated is measured, and the amount of current for energizing and heating is controlled based on the measurement result. The entire heating object 1 (particularly, the slit portion 20) can be accurately heated to a uniform temperature.

FIG. 12 shows another embodiment. In this embodiment, in the embodiment shown in FIG. 6, the temperature of the portion to be heated 1 to be made uniform, that is, the temperature of the slit portion 20 is measured by the thermometer 40. The thermometer 40 and its moving method are the same as those in FIG.
In this embodiment, the molding heat treatment is performed in the same manner as in FIG. 6, but as shown in FIG. 12B, during or after heating by high-frequency induction heating, the thermometer 40 heats the object 1 to be heated. The temperature of the slit section 20 is measured, and based on the measurement result, the amount of air blown out is adjusted so that the slit section 20 has a uniform temperature and cooled. That is, first, the temperature of the slit section 20 of the article 1 to be heated is measured by the thermometer 40, and a high-temperature portion in the slit section 20 is detected from the measurement result. In most cases, the high-temperature portion is generated in a portion B of the object to be heated 1 where heat is hardly dissipated. Next, the slit 2
The blowout amount for cooling the high-temperature portion of 0 with air is determined, and the operation of the compressor is determined to be adjusted to the blowout amount. Next, air is blown out and blown to the object to be heated 1 to cool a high-temperature portion. In this way, the temperature of the slit portion 20 is made uniform, and after maintaining the temperature for a certain period of time, pressure molding (press molding) is performed to perform a molding heat treatment.

In this embodiment, the temperature of the slit portion 20 (the portion to be heated to a uniform temperature) of the object 1 to be heated is measured, and the amount of air blown out is adjusted based on the measurement result. The whole object 1 (especially the slit portion 20) can be accurately heated to a uniform temperature.

FIG. 13 shows another embodiment. In this embodiment, in the embodiment shown in FIG. 7, the temperature of the portion to be heated 1 to be made uniform, that is, the temperature of the slit portion 20 is measured by the thermometer 40. The thermometer 40, the method of moving the same, the method of moving the pedestal 2, and the like are the same as those in FIG. In this embodiment, the molding heat treatment is performed in the same manner as in FIG. 7, but as shown in FIG.
, The temperature of the slit portion 20 of the object 1 is measured, and based on the measurement result, the pedestal 2 is moved so that the slit portion 20 has a uniform temperature, and is heated by heat conduction. That is, first, the temperature of the slit portion 20 of the article 1 to be heated is measured by the thermometer 40, and a low-temperature portion is detected in the slit portion 20 from the measurement result. Next, the pedestal 2 is moved with respect to the object to be heated 1 in order to heat the low-temperature portion of the slit portion 20 with the pedestal 2 more than other high-temperature portions. To decide. Next, the pedestal 2 is moved in the longitudinal direction with respect to the object 1 to be heated, and the core portion 7 is positioned corresponding to the low temperature portion so that the magnetic flux a is concentrated on the low temperature portion. Change the heated object 1
In addition, the heat-generating portion of the pedestal 2 is changed, and the low-temperature portion of the object 1 is heated. Thus, the slit portion 2
After making the temperature of 0 uniform and maintaining that temperature for a certain period of time,
The molding heat treatment is performed by pressure molding (press molding).

In this embodiment, the temperature of the slit portion 20 (the portion to be heated to a uniform temperature) of the object 1 to be heated is measured, and based on the measurement result, the low-temperature portion of the slit portion 20 is heated. The pedestal 2 is moved with respect to the object 1 to be heated, and the magnetic flux a is concentrated on the low-temperature portion of the slit portion 20 to generate heat and heat. Can be accurately heated. Also, by moving the pedestal 2 at high speed, the core portion 7 moves within the magnetic flux a.
The change of the magnetic flux a due to the movement of the magnetic flux a can also be generated, and a large amount of overcurrent generated with the change of the magnetic flux a can be generated. Since the heat is generated in proportion, the object to be heated 1 can be efficiently heated.

FIG. 14 shows another embodiment. In this embodiment, in the embodiment shown in FIG. 8, the thermometer 40 measures a portion of the object 1 to be heated at a uniform temperature, that is, the temperature of the slit section 20. The thermometer 40, the method of moving the same, the method of moving the pedestal 2, and the like are the same as those in FIG. In this embodiment, the molding heat treatment is performed in the same manner as in FIG. 4, but as shown in FIG.
, The temperature of the slit portion 20 of the object 1 is measured, and based on the measurement result, the pedestal 2 is moved so that the slit portion 20 has a uniform temperature, and is heated by heat conduction. That is, first, the temperature of the slit portion 20 of the article 1 to be heated is measured by the thermometer 40, and the low temperature portion and the high temperature portion in the slit portion 20 are detected from the measurement result. Next, the slit section 20
In order to heat the low-temperature portion of the base 2 more than the other high-temperature portion by the heating portion 3 of the pedestal 2 or by concentrating the magnetic flux a in the core portion 7 of the pedestal 2 to the low-temperature portion of the slit portion 20, The pedestal 2 is moved in the longitudinal direction with respect to the object 1 to be heated in order to heat or to absorb the high-temperature portion of the slit portion 20 in the heat-absorbing portion 3 of the pedestal 2 more than other low-temperature portions. The moving direction and the moving amount are determined based on the detection result. Next, the pedestal 2 is moved with respect to the article 1 to be heated, and the heat generating portion 3 of the pedestal 2 is brought into contact with a low-temperature portion of the article 1 to be heated.
Heat is conducted from the heating part 3 heated by the high frequency induction heating to a low temperature part. Alternatively, the pedestal 2 is moved with respect to the object to be heated 1 so that the heat absorbing portion 4 of the pedestal 2 is brought into contact with the high temperature portion of the object to be heated 1, and heat is conducted from the high temperature portion to the heat absorbing portion 4.
Alternatively, the pedestal 2 is moved with respect to the object 1 to be heated, and the core portion 7 is positioned corresponding to the low-temperature portion so that the magnetic flux a is concentrated on the low-temperature portion. The heat-generating portions of the base 1 and the pedestal 2 are changed to heat the low-temperature portion of the object 1 to be heated. In this way, the temperature of the slit portion 20 is made uniform, and after maintaining the temperature for a certain period of time, pressure molding (press molding) is performed to perform a molding heat treatment.

In this embodiment, the temperature of the slit portion 20 (the portion to be heated to a uniform temperature) of the object 1 to be heated is measured, and based on the measurement result, the temperature of the object 1 to be heated by heat conduction from the pedestal 2 is measured. In other words, the low-temperature portion of the slit portion 20 is heated by heat conduction from the heating portion 3 of the pedestal 2 or the pedestal 2 from the high-temperature portion of the slit portion 20 is adjusted.
The pedestal 2 is moved with respect to the object 1 to be heated in order to absorb the heat by heat conduction to the heat absorbing portion 4 or to heat the magnetic flux a by concentrating the magnetic flux a in the low temperature portion of the slit portion 20. Since the low-temperature portion of the section 20 is heated by the pedestal 2 or is heated by heat generation, the entire heated object 1 (particularly, the slit section 20) can be accurately heated to a uniform temperature.

FIG. 15 shows another embodiment. In this embodiment, in addition to the embodiment of FIG. 1, a second coil 9 and a thermometer 40 similar to that of FIG. 9 are provided. As shown in FIG. 15B, the second coil 9 is provided on one side of the pedestal 2 below the first coil 8 for heating the object 1 and the pedestal 2 by high-frequency induction heating. The pedestal 2 has a length substantially the same as that of the pedestal 2.
The second coil 9 is connected to the high frequency power supply 3 in parallel with the first coil 8.
2 and a translation mechanism 45 for moving the second coil 9 along the longitudinal direction of the pedestal 2.

In this embodiment, the molding heat treatment is performed in the same manner as in FIG. 1, but as shown in FIG. 15B, during or after heating by high-frequency induction heating.
The temperature of the slit section 20 of the article 1 to be heated is measured by a thermometer 40, and based on the measurement result, the second coil 9 is moved so that the slit section 20 has a uniform temperature, and the pedestal 2 is subjected to high-frequency induction heating. Then, heat is conducted from the pedestal 2 heated by the second coil 9 to the low-temperature portion of the object 1 to be heated. That is, first, the object to be heated 1 is measured by the thermometer 40.
The temperature of the slit portion 20 is measured, and a low-temperature portion in the slit portion 20 is detected from the measurement result. Next, in order to heat the low-temperature portion of the slit portion 20 with the pedestal 2, a portion of the pedestal 2 located at a position corresponding to the low-temperature portion of the slit portion 20 is heated. The second coil 9 is moved in the longitudinal direction corresponding to the portion of the pedestal 2 to be heated, and the second coil 9 is supplied with power (indicated by an arrow c) to generate a magnetic flux b and to be heated by high-frequency induction heating. Done by The direction and amount of movement of the second coil 9 and the amount of power supplied to the coil 9 are determined based on the result of temperature detection by the thermometer 40. In this manner, a part of the pedestal 2 located at a position corresponding to the low-temperature portion of the slit portion 20 is heated by the second coil 9 and heat is conducted from the heated pedestal 2 to the low-temperature portion of the object 1 to be heated. The temperature of the slit portion 20 is made uniform, and after maintaining the temperature for a certain period of time, pressure molding (press molding) is performed to perform a molding heat treatment.

In this embodiment, the temperature of the slit portion 20 (the portion to be heated to a uniform temperature) of the object 1 to be heated is measured, and based on the measurement result, the temperature of the object 1 to be heated by the heat conduction from the pedestal 2 is measured. In order to adjust the amount of heating of the slits 20, that is, to heat the low-temperature portion of the slit portion 20 by heat conduction from the pedestal 2, a part of the pedestal 2 at a position corresponding to the low-temperature portion of the slit portion 20 is formed by the second coil. Since the heating is performed in step 9, the entire target 1 (particularly, the slit portion 20) can be accurately heated to a uniform temperature. In particular, when the low-temperature portion of the heated object 1 varies in each heated object 1 or when the position of the low-temperature portion changes during heating, the pedestal 2 is heated by moving the second coil 9 as necessary. This makes it possible to accurately heat the entire heated object 1 (particularly, the slit portion 20) to a uniform temperature.

FIG. 16 shows another embodiment. In this embodiment, the device shown in FIG. 1 is provided with the second coil 9 and a thermometer 40 similar to that shown in FIG. 9 as in FIG. 15, but the translation mechanism 45 is not provided. Are fixedly arranged. The second coil 9 is arranged at a position where a portion of the pedestal 2 located at a position corresponding to a portion of the slit portion 20 expected to be a low-temperature portion can be heated. Further, a variable resistor 41 is provided between the second coil 9 and the high frequency power supply 32.

In this embodiment, the molding heat treatment is performed in the same manner as in FIG. 1, but as shown in FIG. 15B, during or after heating by high-frequency induction heating,
The temperature of the slit section 20 of the article 1 to be heated is measured by a thermometer 40, and the pedestal 2 is heated by high-frequency induction heating with the second coil 9 based on the measurement result so that the slit section 20 has a uniform temperature. Further, the pedestal 2 heated by the second coil 9 conducts heat to the low-temperature portion of the object 1 to be heated. That is, first, the temperature of the slit section 20 of the object 1 to be heated is measured by the thermometer 40, and the slit section 2 is measured based on the measurement result.
At 0, the low temperature part is detected. Next, the slit section 20
In order to heat the low temperature part of the
The part of the pedestal 2 located at the position corresponding to the low-temperature part of 0 is heated.
In the same manner as described above, power is supplied to the second coil 9 (indicated by an arrow c) to generate a magnetic flux b and heat the same by high-frequency induction heating. The amount of power supply to the second coil 9 is determined based on the result of temperature detection by the thermometer 40. The amount of power supplied to the second coil 9 is adjusted by changing the resistance value of the variable resistor 41. In this manner, a part of the pedestal 2 located at a position corresponding to the low-temperature portion of the slit portion 20 is heated by the second coil 9 and heat is conducted from the heated pedestal 2 to the low-temperature portion of the object 1 to be heated. The temperature of the slit portion 20 is made uniform, and after maintaining the temperature for a certain period of time, pressure molding (press molding) is performed to perform a molding heat treatment.

In this embodiment, the temperature of the slit portion 20 (the portion to be heated to a uniform temperature) of the object 1 to be heated is measured, and based on the measurement result, the temperature of the object 1 to be heated by the heat conduction from the pedestal 2 is measured. In order to adjust the amount of heating of the slits 20, that is, to heat the low-temperature portion of the slit portion 20 by heat conduction from the pedestal 2, a part of the pedestal 2 at a position corresponding to the low-temperature portion of the slit portion 20 is formed by the second coil. Since the heating is performed in step 9, the entire target 1 (particularly, the slit portion 20) can be accurately heated to a uniform temperature. In particular, this is effective when the low-temperature portion of the object to be heated 1 is specified without variation among the objects to be heated 1.

FIG. 18 shows another embodiment. In this embodiment, a plurality of objects 1 to be heated are continuously formed and heat-treated as shown in FIG. 1 is to be preheated. FIG. 17 shows a heating object band 47 in which a plurality of objects to be heated 1 are continuously formed. The heating object strip 47 is provided with a plurality of objects to be heated 1 arranged between a pair of long supporting pieces 48 in the longitudinal direction of the supporting piece 48. The ends in the directions are connected by connecting pieces 49. The heating object band 47 is formed by punching or bending a hoop material.

The heating jig 50 shown in FIG.
The pedestal 2 and the pre-molding heat treatment unit 10 are integrated. The heating jig 50 is formed of a conductive metal material such as cemented carbide stainless steel.
The distance between the pedestal 2 and the pre-molding heat treatment section 10 is
7 are formed to be equal to the interval between adjacent heated objects 1. The pedestal 2 and the pre-molding heat treatment section 10 are formed to have a higher heat capacity than the object 1 to be heated.

In this embodiment, the forming heat treatment and the preheating are performed as follows. First, the space between the side pieces 21 of the preheated object 1 is inserted into the pedestal 2 from above, and the preheated object 1 is arranged on the pedestal 2 as shown in FIG. When the preheated object 1 is placed on the pedestal 2 in this manner, the surface of the preheated object 1 on which the forming heat treatment is to be performed and which is to be quenched, that is, the lower surface of the slit portion 20 is formed on the pedestal 2. And the inner surface of the side piece 21 is
Touch the side of the Further, the space between the side pieces 21 of the preheated object 1 adjacent to the preheated object 1 before the preheating (unprocessed) is inserted into the pre-molding heat treatment section 10 from above, and the preheating is performed as shown in FIG. The object to be heated 1 is placed in the pre-molding heat treatment section 10. As described above, when the heated object 1 before preheating is arranged in the pre-forming heat treatment section 10, the lower surface of the slit portion 20 of the heated object 1 before preheating contacts the upper surface of the pre-forming heat treatment section 10 and the inner surface of the side piece 21. Contacts the side surface of the pre-molding heat treatment unit 10. Also, as shown in FIG. 18, a coil is provided outside the side piece 21 of the preheated object 1 so that the preheated object 1 and the pedestal 2 are located between the pair of main magnetic flux generating sections 29. 8
Place. At this time, the upper surface of the slit portion 20 of the article 1 to be heated after preheating and the upper surface of the coil 8 are substantially at the same height. Further, one main magnetic flux generating portion 29 of the coil 8 is located between the heated object 1 after preheating and the heated object 1 before preheating.

Next, by supplying power to the coil 8 from the high frequency power supply 32, a magnetic flux a is generated, and the preheated object 1 and the pedestal 2 are heated by high frequency induction heating to be heated at the same time. The article 1 and the pre-molding heat treatment section 10 are heated by high-frequency induction heating and are simultaneously heated. For example, when the object 1 to be heated arranged on the pedestal 2 is 1000
When an electric current is applied to the coil 8 so as to be heated to about 200 ° C., the object to be heated 1 arranged in the pre-molding heat treatment section 10 is heated to about 200 ° C. Then, by this heating, heat is conducted from the pre-molding heat treatment unit 10 to the article 1 to be heated arranged in the pre-molding heat treatment unit 10 to perform preheating. After heating the heated object 1 and the pedestal 2 arranged on the pedestal 2 to a predetermined temperature in this way, the pressing surface 27 of the pressing jig 30 is formed on the slit portion 20 of the heated object 1 arranged on the pedestal 2. The upper surface of the pedestal 2 and the pressing surface 27 of the pressing jig 30 are pressed against each other by pressing the slit 20 between the upper surface of the pedestal 2 and the pressing surface 27 so that the upper surface of the slit 20 is flattened. The heat treatment distortion of the object to be heated 1 arranged on the pedestal 2 is reduced. Thereafter, the pressing jig 30
Release the pressurization by. Next, the object to be heated 1 after preheating is removed from the pre-molding heat treatment unit 10, and the object to be heated 1 after pressure molding is removed from the pedestal 2. Next, the heated object strip 47 is advanced from the pre-molding heat treatment section 10 toward the pedestal 2 so that the preheated object 1 is disposed on the pedestal 2 and is adjacent to the preheated object 1. The matching unprocessed object to be heated 1 is placed in the pre-molding heat treatment section 10. In this way, by moving the heating object band 47 and sequentially feeding the heating object 1, the plurality of heating objects 1 can be continuously subjected to preheating and forming heat treatment. The conditions for the molding heat treatment are the same as in the embodiment of FIG.

In this embodiment, a pedestal 2 having a simpler shape and a higher heat capacity than the object 1 to be heated is used, and a portion A of the object 1 to be heated is easily brought into contact with the pedestal 2 so that the pedestal 2 is heated. The object A is heated together with the object 1 by high-frequency induction heating, so that the heat of the pedestal 2 is conducted to the part A where heat is easily radiated, and the heat radiated into the air from the part A where heat is easily radiated. Irrespective of the difference between the amount of heat generated by the object to be heated 1 itself and the amount of heat radiated by the object to be heated 1, the temperature difference between the portion A where heat is easily radiated and the portion B where heat is hardly radiated becomes small. The entire heating object 1 (particularly, the slit portion 20) can be heated to a uniform temperature.

Further, since the object to be heated 1 is formed by punching or bending, impurities such as oil may adhere to the object to be heated 1. Performing the molding heat treatment) may have an adverse effect on the object 1 to be heated, thereby deteriorating the quality of the component. Therefore, in this embodiment, before performing the heating and pressing molding on the pedestal 2, the object to be heated 1 is preheated by the pre-molding heat treatment unit 10 to evaporate and remove impurities such as oil adhered thereto. In addition, since impurities are removed in this manner, high-quality quenching can be performed on the pedestal 2 and the quality of components can be improved. In addition, preheating can be performed simultaneously with heating by high-frequency induction heating performed on the pedestal 2,
It is not necessary to separately perform preheating, so that productivity can be improved. Further, a coil 8 for high-frequency induction heating of the pedestal 2 and the article 1 to be heated arranged on the pedestal 2 is used, and a magnetic flux a generated from this coil 8 is disposed in the pre-forming heat treatment section 10 and the pre-forming heat treatment section 10. Preheating can be performed by guiding the object 1 to be heated, and a separate heating device for performing the preheating is not required, and the space can be reduced.

FIG. 19 shows another embodiment. In this embodiment, at least one of the pedestal 2 and the pre-molding heat treatment unit 10 in FIG. 18 is replaced with a base 35 formed of a metal material and a core formed of a ferrite material, as shown in FIG. 7 and is formed similarly to the pedestal 2 in FIG. Also such a pedestal 2
And a heating jig 50 similar to that of FIG. The pedestal 2 and the pre-forming heat treatment unit 1
0 may be formed in the same manner as the pedestal 2 in FIG.

In this embodiment, the preheating and the pedestal 2 in the pre-forming heat treatment section 10 are performed in the same manner as in the embodiment of FIG.
Can be performed at the same time. When only the heat and pressure molding in the pedestal 2 is to be performed at a high temperature and the preheating in the pre-molding heat treatment section 10 is to be performed at a low temperature, the core section 7 is provided only in the pedestal 2 and the core section 7 is provided in the pre-molding heat treatment section 10. Can be prevented from being decorated. Thus, the magnetic flux a generated from the coil 8 can be concentrated on the pedestal 2 side. Also, the core 7 is provided inside both the pedestal 2 and the pre-molding heat treatment section 10 so that
May be heated. In this case, since the pedestal 2 receives the magnetic flux a from both the main magnetic flux generating portions 29 of the coil 8, the amount of magnetic flux is about twice as large as that of the pre-forming heat treatment portion 10 which receives the magnetic flux a only from one of the main magnetic flux generating portions 29. Will be heated by
Although the pedestal 2 has a higher temperature than the pre-molding heat treatment unit 10, the provision of the core 7 in the pre-molding heat treatment unit 10 allows
Since the whole object 1 is heated to a uniform temperature as in the above case, impurities attached to the entire surface of the object 1 can be removed by evaporation.

FIG. 20 shows another embodiment. In this embodiment, a plurality of objects 1 to be heated 1 are continuously formed and heat-treated as shown in FIG. 17, and after the heat treatment for forming the pedestal 2, the objects 1 to be heated are annealed. It is tempering. The heating jig 50 shown in FIG. 20 is formed by erecting the pedestal 2 and the post-molding heat treatment unit 11 on the upper surface, and the pedestal 2 and the post-molding heat treatment unit 11 are integrated. The heating jig 50 is formed of a conductive metal material such as superhard stainless steel, and the pedestal 2 and the post-molding heat treatment unit 11 are formed in the same manner as the support 26 of the pedestal 2 shown in FIG. The pedestal 2 and the post-molding heat treatment section 11
Is formed to be equal to the interval between the heated objects 1 adjacent to the heating object band 47. The pedestal 2 and the post-molding heat treatment unit 1
1 has a higher heat capacity than the object 1 to be heated.

In this embodiment, the forming heat treatment, annealing and tempering are performed as follows. First, the untreated object to be heated 1 is inserted into the pedestal 2 between the side pieces 21 from above, and the untreated object to be heated 1 is arranged on the pedestal 2 as shown in FIG. When the unprocessed heated object 1 is disposed on the pedestal 2 in this manner, the surface on which the unprocessed heated object 1 is to be subjected to the forming heat treatment and which is to be quenched, that is, the lower surface of the slit portion 20 is located on the pedestal 2. And the side piece 21
Contact the side surface of the pedestal 2. Further, the space between the side pieces 21 of the object 1 to be heated adjacent to the untreated object 1 after the pressure molding (after the molding heat treatment) is inserted into the post-molding heat treatment section 11 from above, and FIG. As shown in the figure, the object to be heated 1 after the pressure molding is disposed in the post-molding heat treatment section 11. As described above, when the heated object 1 after the pressure molding is disposed in the post-molding heat treatment section 11, the lower surface of the slit portion 20 of the heated object 1 after the pressure molding comes into contact with the upper surface of the post-molding heat treatment section 11. Piece 2
1 contacts the side surface of the heat treatment part 11 after molding. Also, as shown in FIG. 20, a coil is provided outside the side piece 21 of the untreated heated object 1 so that the untreated heated object 1 and the pedestal 2 are located between the pair of main magnetic flux generating sections 29. 8 is arranged. At this time, the upper surface of the slit portion 20 of the unprocessed heated object 1 and the upper surface of the coil 8 are substantially at the same height. Further, one main magnetic flux generating portion 29 of the coil 8 is located between the heated object 1 after the pressure molding and the unprocessed heated object 1.

Next, by supplying power to the coil 8 from the high frequency power supply 32, a magnetic flux a is generated, and the unprocessed object 1 and the pedestal 2 are heated by high frequency induction heating to be heated at the same time. The object to be heated 1 and the post-molding heat treatment unit 11 are heated by high-frequency induction heating and are simultaneously heated. For example, when the object to be heated 1 arranged on the pedestal 2 is 100
When a current is applied to the coil 8 so that it is heated to about 0 ° C.,
The object to be heated 1 arranged in the heat treatment part 11 after molding is 200 to
It is heated to about 400 ° C. By this heating, heat is conducted from the post-molding heat treatment section 11 to the article to be heated 1 arranged in the post-molding heat treatment section 11 to perform annealing and tempering.
After the object to be heated 1 and the pedestal 2 arranged on the pedestal 2 are heated to a predetermined temperature in this manner, the pressing surface 2 of the pressing jig 30 is heated.
7 is brought into contact with the upper surface of the slit 20 of the object 1 to be heated placed on the pedestal 2, and the upper surface of the pedestal 2 and the pressing surface 2 of the pressing jig 30 are pressed.
By pressing the slits 20 between them, the upper surface of the slits 20 is press-formed so that the upper surface of the slits 20 is flat, and the heat treatment distortion of the object to be heated 1 arranged on the pedestal 2 is reduced. Thereafter, the pressing by the pressing jig 30 is released. Next, the object to be heated 1 after annealing and tempering is removed from the post-molding heat treatment section 11 and the object to be heated 1 after pressure molding is removed from the pedestal 2. Next, the heated object band 47 is advanced from the pedestal 2 toward the post-molding heat treatment section 11, so that the heated article 1 after the pressure molding is disposed in the post-molding heat treatment section 11 and the post-molding heat treatment section 11. The unprocessed heated object 1 adjacent to the heated object 1 arranged at 11 is arranged on the pedestal 2.
In this way, by moving the heating target strip 47 and sequentially feeding the heating target 1, it is possible to continuously perform the forming heat treatment and the annealing and the tempering on the plurality of heating target 1. The conditions for the molding heat treatment are the same as in the embodiment of FIG.

In this embodiment, a pedestal 2 having a simpler shape and a higher heat capacity than the object 1 to be heated is used, and a portion A of the object 1 to be radiated easily is brought into contact with the pedestal 2, and the pedestal 2 is heated. The object 1 is heated by high-frequency induction heating, so that the heat of the pedestal 2 is conducted to the portion A where heat is easily radiated, and the heat radiated into the air from the portion A where heat is easily radiated. Irrespective of the difference between the amount of heat generated by the object to be heated 1 itself and the amount of heat radiated from the object to be heated 1, the temperature difference between the portion A where heat is easily radiated and the portion B where heat is hardly radiated becomes small. The entire heating object 1 (especially the slit portion 20) can be heated to a uniform temperature. In addition, since annealing and tempering are performed after quenching by the forming heat treatment, the quality of quenching can be improved, and the quality of parts can be improved. In addition, annealing and tempering can be performed simultaneously with the heating by the high-frequency induction heating performed on the pedestal 2, so that it is not necessary to separately perform annealing and tempering, and the productivity can be improved. Further, a coil 8 for high-frequency induction heating of the pedestal 2 and the article 1 to be heated arranged on the pedestal 2 was used, and a magnetic flux a generated from this coil 8 was disposed in the post-forming heat treatment section 11 and the post-forming heat treatment section 11. Annealing and tempering can be performed by being guided to the object 1 to be heated, and a heating device for performing annealing and tempering is not separately required, and the space can be reduced.

FIG. 21 shows another embodiment. In this embodiment, at least one of the pedestal 2 and the post-forming heat treatment part 11 in FIG. It is composed of the core 7 and is formed similarly to the pedestal 2 in FIG. Also such a pedestal 2
A heating jig 50 similar to that shown in FIG. The pedestal 2 and the post-molding heat treatment unit 1
At least one of them may be formed in the same manner as the pedestal 2 in FIG.

In this embodiment, as in the embodiment shown in FIG. 20, annealing and tempering in the post-molding heat treatment section 11 and heat-press molding (molding heat treatment) in the pedestal 2 can be performed simultaneously. When only the heat and pressure forming in the pedestal 2 is to be performed at a high temperature and the annealing and tempering in the post-forming heat treatment section 11 are to be performed at a low temperature, the core 7 is provided only in the pedestal 2 and the post-forming heat treatment section 11 is provided. The core portion 7 can be prevented from being provided inside. Thus, the magnetic flux a generated from the coil 8 can be concentrated on the pedestal 2 side. The core 1 may be provided in both the pedestal 2 and the post-molding heat treatment unit 11 to heat the object 1 to be heated. In this case, since the pedestal 2 receives the magnetic flux a from both the main magnetic flux generating portions 29 of the coil 8, the magnetic flux amount is about twice as large as that of the post-forming heat treatment portion 11 which receives the magnetic flux a from only one of the main magnetic flux generating portions 29. The pedestal 2 is heated at a higher temperature than the heat-treated portion 11 after molding. However, by providing the core portion 7 in the heat-treated portion 11 after molding, the entire heated object 1 is formed in the same manner as in FIG. Is heated to a uniform temperature, so that annealing and tempering can be performed uniformly and stably on the entire surface of the article 1 to be heated, and the quality of parts can be improved.

FIG. 22 shows another embodiment. In this embodiment, a plurality of objects to be heated 1 are continuously formed and heat-treated as shown in FIG. 17, and the object to be heated 1 is preheated before the heat treatment for forming the pedestal 2. After the heat treatment for forming the base 2,
Is annealed or tempered. The heating jig 50 shown in FIG. 22 is formed by erecting the pedestal 2, the pre-molding heat treatment unit 10, and the post-molding heat treatment unit 11 on the upper surface. It is integrated. The pedestal 2 is disposed between the pre-molding heat treatment unit 10 and the post-molding heat treatment unit 11. The heating jig 50 is formed of a conductive metal material such as super hard stainless steel, and the pedestal 2, the pre-molding heat treatment unit 10, and the post-molding heat treatment unit 11 are the same as the support unit 26 of the pedestal 2 shown in FIG. 1. Is formed. The distance between the pedestal 2, the pre-molding heat treatment unit 10, and the post-molding heat treatment unit 11 is set to
Are formed to be equal to each other. The pedestal 2, the pre-molding heat treatment unit 10, and the post-molding heat treatment unit 11 are formed to have higher heat capacities than the object 1 to be heated.

In this embodiment, the forming heat treatment, preheating, annealing and tempering are performed as follows. First, the space between the side pieces 21 of the preheated object 1 is inserted into the pedestal 2 from above, and as shown in FIG.
On the pedestal 2. When the heated object 1 after preheating is placed on the pedestal 2 as described above, the surface on which the unprocessed heated object 1 is to be subjected to the forming heat treatment and which is to be quenched, that is, the lower surface of the slit portion 20 is located on the pedestal 2. And the inner surface of the side piece 21 contacts the side surface of the pedestal 2. In addition, the space between the side pieces 21 of the heated object 1 adjacent to the preheated object 1 after the preheating and after another pressure forming (after the forming heat treatment) is inserted into the post-forming heat treatment section 11 from above, and FIG. As shown in the figure, the object to be heated 1 after the pressure molding is arranged in the post-molding heat treatment section 11. As described above, when the heated object 1 after the pressure molding is disposed in the post-molding heat treatment section 11, the lower surface of the slit portion 20 of the heated object 1 after the pressure molding comes into contact with the upper surface of the post-molding heat treatment section 11. The inner surface of the piece 21 contacts the side surface of the heat treatment part 11 after molding. Furthermore, the space between the side pieces 21 of the preheated article 1 adjacent to the preheated article 1 after the preheating is inserted into the pre-forming heat treatment section 10 from above, and the preheating is performed as shown in FIG. The object to be heated 1 is placed in the pre-molding heat treatment section 10. In this way, the object to be heated 1 before preheating is heat-treated at the pre-forming heat treatment section 1.
0, the slit portion 20 of the object 1 to be heated before preheating is performed.
Is in contact with the upper surface of the pre-forming heat treatment unit 10 and the inner surface of the side piece 21 is in contact with the side surface of the pre-forming heat treatment unit 10.
Further, as shown in FIG. 22, the preheated object 1 and the pedestal 2 are located between the pair of main magnetic flux generation units 29 so that
The coil 8 is arranged outside the side piece 21 of the preheated object 1 to be heated. At this time, the upper surface of the slit portion 20 of the article 1 to be heated after preheating and the upper surface of the coil 8 are substantially at the same height. Also, between the heated object 1 after the pressure molding and the heated object 1 after the preheating,
In addition, the main magnetic flux generating portions 29 of the coil 8 are located one by one between the heated object 1 before the preheating and the heated object 1 after the preheating.

Next, a magnetic flux a is generated by supplying power to the coil 8 from the high-frequency power supply 32, and the preheated object 1 and the pedestal 2 are heated by high-frequency induction heating to be heated at the same time. The object to be heated 1 and the post-molding heat treatment section 11 are heated by high-frequency induction heating and are simultaneously heated.
Are heated by high frequency induction heating and are simultaneously heated. By this heating, heat is conducted from the post-molding heat treatment section 11 to the article to be heated 1 arranged in the post-molding heat treatment section 11 to perform annealing and tempering, and the pre-molding heat treatment section 10 is disposed in the pre-molding heat treatment section 10. Heat is conducted to the heated object 1 to be preheated. After heating the heated object 1 and the pedestal 2 arranged on the pedestal 2 to a predetermined temperature in this way, the pressing surface 27 of the pressing jig 30 is formed on the slit portion 20 of the heated object 1 arranged on the pedestal 2. The upper surface of the pedestal 2 and the pressing surface 27 of the pressing jig 30 are pressed against each other by pressing the slit 20 between the upper surface of the pedestal 2 and the pressing surface 27 so that the upper surface of the slit 20 is flattened. The heat treatment distortion of the object to be heated 1 arranged on the pedestal 2 is reduced. Thereafter, the pressing by the pressing jig 30 is released. Next, the object to be heated 1 after annealing and tempering is removed from the post-molding heat treatment unit 11, the object to be heated 1 after pressure molding is removed from the pedestal 2, and the object to be heated 1 after preheating is removed from the heat treatment unit before molding. Remove from 10. Next, the heated article strip 47 is advanced from the pre-molding heat treatment section 10 toward the post-molding heat treatment section 11 so that the article to be heated 1 after the pressure molding is arranged in the post-molding heat treatment section 11 and formed. The preheated object 1 adjacent to the heated object 1 disposed in the post-heat treatment section 11 is disposed on the pedestal 2, and the untreated heated object 1 adjacent to the preheated object 1 is subjected to a pre-forming heat treatment section. 10
To place. In this way, by moving the heating object band 47 and sequentially sending the heating object 1, the plurality of heating objects 1 can be continuously subjected to forming heat treatment, annealing, tempering, and preheating. it can. The conditions for the molding heat treatment are the same as in the embodiment of FIG.

In this embodiment, a pedestal 2 having a simpler shape and a higher heat capacity than the object 1 to be heated is used, and a portion A of the object 1 to be radiated easily is brought into contact with the pedestal 2, and the pedestal 2 is heated. The object A is heated together with the object 1 by high-frequency induction heating, so that the heat of the pedestal 2 is conducted to the part A where heat is easily radiated, and the heat radiated into the air from the part A where heat is easily radiated. Irrespective of the difference between the amount of heat generated by the object to be heated 1 itself and the amount of heat radiated by the object to be heated 1, the temperature difference between the portion A where heat is easily radiated and the portion B where heat is hardly radiated becomes small. The entire heating object 1 (especially the slit portion 20) can be heated to a uniform temperature. In addition, since annealing and tempering are performed after quenching by the forming heat treatment, the quality of quenching can be improved, and the quality of parts can be improved. In addition, annealing and tempering can be performed simultaneously with the heating by the high-frequency induction heating performed on the pedestal 2, so that it is not necessary to separately perform annealing and tempering, and the productivity can be improved. Further, a coil 8 for high-frequency induction heating of the pedestal 2 and the article 1 to be heated arranged on the pedestal 2 was used, and a magnetic flux a generated from this coil 8 was disposed in the post-forming heat treatment section 11 and the post-forming heat treatment section 11. Annealing and tempering can be performed by being guided to the object 1 to be heated, and a heating device for performing annealing and tempering is not separately required, and the space can be reduced. Further, before performing the heating and pressing molding on the pedestal 2, the object to be heated 1 is preheated by the pre-molding heat treatment unit 10 to evaporate and remove impurities such as oil adhered thereto. And can improve the quality of parts. In addition, preheating can be performed at the same time as the heating by the high-frequency induction heating performed on the pedestal 2, and there is no need to separately perform preheating, so that productivity can be improved. Further, a coil 8 for high-frequency induction heating of the pedestal 2 and the object 1 disposed on the pedestal 2 is used, and a magnetic flux a generated from this coil 8 is used for the pre-forming heat treatment section 1.
The preheating can be performed by guiding the object to be heated 1 disposed in the heat treatment section 10 and the pre-forming heat treatment section 10, and a separate heating device for performing the preheating is not required, and the space can be reduced.

FIG. 23 shows another embodiment. In this embodiment, as shown in FIG. 22, at least one of the pedestal 2, the pre-molding heat treatment unit 10, and the post-molding heat treatment unit 11 is replaced with a base 3 made of a metal material as shown in FIG.
5 and a core portion 7 formed of a ferrite material, and is formed in the same manner as the pedestal 2 in FIG.
Further, a heating jig 50 similar to that of FIG. Note that at least one of the pedestal 2, the pre-molding heat treatment unit 10, and the post-molding heat treatment unit 11 may be formed in the same manner as the pedestal 2 in FIG.

In this embodiment, the preheating and the pedestal 2 in the pre-forming heat treatment section 10 are performed in the same manner as in the embodiment of FIG.
, And annealing and tempering in the post-forming heat treatment section 11 can be performed simultaneously. When only the heat and pressure molding in the pedestal 2 is to be performed at a high temperature and the preheating in the pre-molding heat treatment unit 10 and the annealing and tempering in the post-molding heat treatment unit 11 are to be performed at a low temperature, the core 7 is provided only in the pedestal 2. The core part 7 can be prevented from being provided inside the pre-molding heat treatment part 10 or the post-molding heat treatment part 11. Thus, the magnetic flux a generated from the coil 8 can be concentrated on the pedestal 2 side. Further, the core 1 may be provided inside both the pedestal 2 and the pre-molding heat treatment unit 10 to heat the object 1 to be heated. In this case, since the pedestal 2 receives the magnetic flux a from both the main magnetic flux generating portions 29 of the coil 8, the amount of magnetic flux is about twice as large as that of the pre-forming heat treatment portion 10 which receives the magnetic flux a only from one of the main magnetic flux generating portions 29. The pedestal 2 is heated at a higher temperature than the pre-molding heat treatment section 10. However, by providing the core section 7 in the pre-molding heat treatment section 10, the entire heated object 1 is formed in the same manner as in FIG. Is heated to a uniform temperature, impurities adhering to the entire surface of the object to be heated 1 can be removed by evaporation. Also pedestal 2
Alternatively, the object to be heated 1 may be heated by providing the core part 7 in both the heat treatment part 11 and the post-forming heat treatment part 11. In this case, the base 2 is a coil 8
Since the magnetic flux a is received from both of the main magnetic flux generating parts 29, the magnetic flux is heated by about twice as much as the post-forming heat treatment part 11 which receives the magnetic flux a only from one of the main magnetic flux generating parts 29, The pedestal 2 has a higher temperature than the heat-treated portion 11 after molding. However, by providing the core portion 7 in the heat-treated portion 11 after molding, the entire heated object 1 is heated to a uniform temperature as in the case of FIG. Therefore, annealing and tempering can be uniformly and stably performed on the entire surface of the article 1 to be heated, and the quality of parts can be improved.

[0101]

As described above, the invention according to claim 1 of the present invention is a molding heat treatment for heating a heated object having a complicated shape formed by molding a thin metal plate and press-forming the heated object. In the processing method, a pedestal made of metal and having a higher heat capacity than the object to be heated is formed, the object to be heated is placed in contact with the pedestal, and the object to be heated and the pedestal are heated by high-frequency induction heating,
Since heat is conducted from the pedestal to the object to be heated, the heat of the pedestal can be conducted to the part of the object to be radiated where heat is easily radiated, and the heat radiated into the air can be compensated for from the part where heat is easily radiated.
The object to be heated having various complicated shapes can be heated to a uniform temperature. Since the object to be heated can be heated to a uniform temperature over the entire object, uniform quenching can be performed on the object to be heated, and a high quality part with less variation in hardness and structure can be obtained. Things.

According to a second aspect of the present invention, there is provided a molding heat treatment method for heating a heated object having a complicated shape formed by molding a thin metal plate, and press-forming the heated object. Forming a pedestal having a heating portion, placing the object to be heated on the pedestal, bringing the heating portion into contact with a portion of the object to be easily radiated, heating the object to be heated and the heating portion by high-frequency induction heating, Since the heat is conducted to the part of the object to be radiated easily, only the part of the pedestal that is easy to radiate heat contacts the heating part of the object, and the heating part of the pedestal is heated together with the object by high-frequency induction heating. By conducting heat only from the heat-generating part to the heat-dissipating part of the heating object, the heat dissipated from the heat-dissipating part can be compensated by the heat conducted from the heat-generating part, and the heated object having various complicated shapes Keep things at a uniform temperature Those capable of heat.

[0103] The invention according to claim 3 of the present invention is directed to a forming heat treatment method for heating an object to be heated having a complicated shape formed by molding a metal thin plate and press-forming the heated object to be heated. A pedestal having a heat-generating part and a heat-absorbing part made of ceramic is formed.The object to be heated is arranged on the pedestal. The heat-generating part and the heat-generating part are heated by high-frequency induction heating, and heat is conducted from the heat-generating part to a part where heat is easily radiated from the heat-generating part and heat is conducted from a part where the heat-generating part hardly dissipates heat to the heat absorbing part. Therefore, it is possible to supplement the heat radiated from the part that is easy to radiate with the heat conducted from the heat generating part, and to radiate the heat from the part that is hard to radiate to the heat absorbing part. temperature It is capable of heating the in becomes smaller object to be heated having various complex shapes at a uniform temperature.

According to a fourth aspect of the present invention, there is provided a molding heat treatment method for heating an object to be heated having a complicated shape formed by molding a metal thin plate and press-forming the heated object. Forming a pedestal having, arranging the object to be heated on the pedestal, bringing the electrode into contact with a portion of the object to be radiated easily,
The object to be heated is heated by high-frequency induction heating, and electricity is passed from the electrode to the easy-to-dissipate portion of the object to generate heat. Thus, the temperature difference between the portion where heat is easily radiated and the portion where heat is hardly radiated is reduced, and the object to be heated having various complicated shapes can be heated to a uniform temperature.

According to a fifth aspect of the present invention, there is provided a molding heat treatment method for heating a heated object having a complicated shape formed by molding a metal thin plate and press-forming the heated object. A pedestal with a mouth is formed, the object to be heated is arranged on the pedestal, the portion of the object to be radiated that is difficult to radiate is opposed to the air outlet, and the object to be heated is heated by high-frequency induction heating, and heated from the air outlet. Air is blown to the part where heat is hard to dissipate and the air is cooled, so that the part where heat is hard to dissipate can be cooled with air. The heating object can be heated to a uniform temperature.

According to a sixth aspect of the present invention, there is provided a molding heat treatment method for heating an object to be heated having a complicated shape obtained by molding a thin metal plate and press-forming the heated object. A pedestal having a core portion is formed, the object to be heated is arranged on the pedestal, the core portion is positioned corresponding to a portion of the object to be radiated easily, and the object to be heated is heated by high-frequency induction heating, and high-frequency induction heating is performed. At the time of heating, the magnetic flux concentrated on the core portion and the heat-dissipating portion of the heated object causes the heat-dissipating portion of the heated object to generate heat, so that the heat-dissipating portion of the heated object is heated more than the heat-dissipating portion. At the same time, heat can be increased by increasing the heat conduction from the metal part of the pedestal that contacts the heat-dissipating part of the object to the heat-dissipating part, and the temperature difference between the heat-dissipating part and the heat-dissipating part is small. It is capable of heating the object to be heated to a uniform temperature with a variety of complex shapes Te Kuna'.

According to a seventh aspect of the present invention, there is provided a molding heat treatment method for heating an object to be heated having a complicated shape formed by molding a metal thin plate and press-forming the heated object to be heated. A pedestal having a heat-generating portion, a ceramic heat-absorbing portion and a ferrite core portion is formed, the object to be heated is arranged on the pedestal, the heat-generating portion is brought into contact with a portion of the object to be easily radiated, and The heat-absorbing part is brought into contact with the part that is difficult to dissipate heat, the core part is positioned corresponding to the part where heat is easily dissipated from the object to be heated, and the object to be heated and the heat-generating part are heated by high-frequency induction heating. Conducts heat to the heat-dissipating part and heat-dissipates to the heat-absorbing part from the hard-to-heat-dissipating part. Easy to do Because it is heated, it is possible to supplement the heat radiated from the part that is easy to radiate with the heat conducted from the heat generating part, and to radiate the heat to the heat absorbing part from the part that is difficult to radiate, and to concentrate on the core part Due to the magnetic flux, the heat-dissipating part of the heated object is heated more than the heat-dissipating part, and the heat conduction from the metal part of the pedestal that contacts the heat-dissipating part of the heated object to the heat-dissipating part is increased. In this case, the temperature difference between a portion where heat is easily radiated and a portion where heat is hardly radiated is reduced, so that an object to be heated having various complicated shapes can be heated to a uniform temperature.

The invention according to claim 8 of the present invention measures the temperature of the object to be heated and, based on the measurement result, causes the heating portion of the pedestal to come into contact with the portion of the object with a low temperature. Since the pedestal is moved with respect to the heated object, a portion where the temperature of the object to be heated is low can be heated by the heat generating portion of the pedestal, and the object to be heated can be accurately heated to a uniform temperature.

According to a ninth aspect of the present invention, the temperature of the object to be heated is measured, and based on the measurement result, the heating portion of the pedestal is brought into contact with a portion where the temperature of the object to be heated is low, or The pedestal is moved with respect to the heated object so that the heat-absorbing part of the pedestal contacts the high-temperature part of the heated object, so that the low-temperature part of the heated object can be heated by the heating part of the pedestal. Alternatively, heat can be absorbed by the heat absorbing portion of the pedestal from a portion where the temperature of the object to be heated is high, and the object to be heated can be accurately heated to a uniform temperature.

In the invention according to claim 10 of the present invention, the temperature of the object to be heated is measured, and the amount of electricity to the portion of the object to be radiated easily is adjusted based on the measurement result. The amount of heat generated in the portion where heat is easily radiated can be controlled, and the object to be heated can be accurately heated to a uniform temperature.

According to the eleventh aspect of the present invention, the temperature of the object to be heated is measured, and based on the measurement result, the amount of air blown to the portion of the object to be heated that is difficult to radiate is adjusted. It is possible to control the degree of cooling of a portion of the object to be heated that is difficult to radiate heat, and to accurately heat the object to be heated to a uniform temperature.

According to a twelfth aspect of the present invention, the temperature of the object to be heated is measured, and based on the measurement result, the core portion of the pedestal is positioned corresponding to the portion where the temperature of the object to be heated is low. Since the pedestal is moved relative to the object to be heated, the amount of heat generated can be controlled by changing the amount of magnetic flux in a portion where the temperature of the object to be heated is low, and the object to be heated can be accurately heated to a uniform temperature. Is what you can do.

According to a thirteenth aspect of the present invention, the temperature of the object to be heated is measured, and based on the measurement result, the heating portion of the pedestal is brought into contact with a portion where the temperature of the object to be heated is low.
Alternatively, the pedestal may be positioned relative to the object to be heated such that the core of the pedestal is positioned corresponding to a portion where the temperature of the object to be heated is low, or the heat absorbing portion of the pedestal is brought into contact with a portion where the temperature of the object to be heated is high. Can be heated by the heat-generating portion of the pedestal, or the heat-absorbing portion of the pedestal can absorb heat from the portion of the object having a high temperature. The amount of heat generation can be controlled by changing the amount of magnetic flux in a portion where the temperature is low, and the object to be heated can be accurately heated to a uniform temperature.

[0114] The invention according to claim 14 of the present invention is directed to a first method for heating an object to be heated and a pedestal by high frequency induction heating.
And a second coil for heating the pedestal by high-frequency induction heating, heating the object to be heated and the pedestal by high-frequency induction heating with the first coil, measuring the temperature of the object to be heated, Based on the measurement result, the second coil is moved with respect to the pedestal such that a portion of the pedestal that contacts the low-temperature portion of the object to be heated is heated by the second coil. According to the temperature of the low-temperature portion, a portion of the pedestal at a position corresponding to the low-temperature portion can be heated by the second coil, and the object to be heated can be accurately heated to a uniform temperature.

According to a fifteenth aspect of the present invention, there is provided a forming heat treatment method comprising: a first coil for heating an object to be heated and a pedestal by high-frequency induction heating; and a second coil for heating the pedestal by high-frequency induction heating. A coil, and the pedestal and the second coil are arranged so that a part of the pedestal in contact with a portion of the object to be radiated easily is heated by the second coil. The pedestal is heated by high-frequency induction heating, the temperature of the object to be heated is measured, and the amount of power to the second coil is adjusted based on the measurement result. A portion of the pedestal at a position corresponding to the low temperature portion can be heated by the second coil by controlling the amount of electricity to the second coil, and the object to be heated can be accurately heated to a uniform temperature. Things.

According to a sixteenth aspect of the present invention, when continuously performing a forming heat treatment process on a plurality of objects to be heated, a pre-forming heat treatment portion is integrally formed on a pedestal, and an unprocessed heated object is formed. The object is placed in contact with the pre-molding heat treatment section, and the untreated object to be heated and the pre-molding heat treatment section are heated by high-frequency induction heating to heat the pedestal, and heat is transferred from the pre-molding heat treatment section to the untreated object to be heated. Therefore, the untreated object to be heated can be preheated at the same time as the heating in the molding heat treatment, and impurities can be removed from the untreated object to be subjected to high-quality molding heat treatment.

In the invention according to claim 17 of the present invention, at least one of the pedestal having the ferrite core portion and the pre-molding heat treatment portion having the ferrite core portion is used.
By providing the core portion and adjusting the amount of magnetic flux, the temperature of the molding heat treatment or the preheating can be controlled, and the molding heat treatment or the preheating can be performed with good quality.

The invention according to claim 18 of the present invention is characterized in that a heat treatment part is formed integrally with a pedestal after the forming and heat treatment is performed continuously on a plurality of objects to be heated. The object to be heated after molding is placed in contact with the heat treatment part after molding, and the object to be heated after pressure molding and the heat treatment part after molding are heated by high frequency induction heating to heat the pedestal. Since heat is conducted to the heated object after molding,
The object to be heated after the forming heat treatment can be annealed or tempered at the same time as the heating in the forming heat treatment, and a high quality part can be manufactured.

The invention according to claim 19 of the present invention uses at least one of a pedestal having a ferrite core portion and a post-molding heat treatment portion having a ferrite core portion.
By providing the core portion and adjusting the amount of magnetic flux, the temperature of the forming heat treatment or annealing and tempering can be controlled, and high-quality forming heat treatment and annealing and tempering can be performed.

In the invention according to claim 20 of the present invention, when continuously heating a plurality of objects to be heated, a pre-forming heat treatment section and a post-forming heat treatment section are integrally formed on a base,
The unprocessed object to be heated is placed in contact with the pre-molding heat treatment section, and the object to be pressure-formed on the pedestal is placed in contact with the heat treatment section after molding, and the untreated article is heated by high-frequency induction heating to heat the pedestal. The object to be heated and the heat treatment part before molding and the object to be heated after pressure molding and the heat treatment part after molding are heated to conduct heat from the heat treatment part before molding to the untreated object to be heated, and the pressure molding from the heat treatment part after molding. Since heat is transferred to the object to be heated later,
Simultaneously with the heating in the molding heat treatment, the untreated object to be heated can be preheated or the object to be heated after the molding heat treatment can be annealed or tempered, so that high quality parts can be manufactured. Things.

According to a twenty-first aspect of the present invention, at least one of a pedestal having a ferrite core portion, a pre-molding heat treatment portion having a ferrite core portion, and a post-molding heat treatment portion having a ferrite core portion. Therefore, by providing a core portion and adjusting the amount of magnetic flux, it is possible to control the temperature of the forming heat treatment or the preheating or annealing and tempering, and to perform the high quality forming heat treatment and the preheating, annealing and annealing and tempering. Can be applied.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention, in which (a) is a perspective view, (b) is a cross-sectional view, and (c) is a partial perspective view.

FIG. 2 is a perspective view showing an object to be heated according to the first embodiment;

FIG. 3 shows an example of another embodiment of the present invention, and (a)
(B) is a perspective view, (c) is a bottom view.

FIG. 4 shows an example of another embodiment of the present invention, and (a)
(B) is a perspective view, (c) is a bottom view.

5A and 5B show an example of another embodiment of the present invention, wherein FIG. 5A is a perspective view and FIG. 5B is a bottom view.

6A and 6B show an example of another embodiment of the above, wherein FIG. 6A is a perspective view and FIG. 6B is a bottom view.

7A and 7B show an example of another embodiment of the above, wherein FIG. 7A is a perspective view and FIG. 7B is a bottom view.

8A and 8B show an example of another embodiment of the above, wherein FIG. 8A is a perspective view and FIG. 8B is a bottom view.

FIG. 9 shows an example of another embodiment of the above, wherein (a) is a perspective view and (b) is a flowchart.

FIG. 10 shows an example of another embodiment of the above, and (a)
Is a perspective view, and (b) is a flowchart.

FIG. 11 shows an example of another embodiment of the present invention, and (a)
Is a perspective view, (b) is a bottom view, and (c) is a flowchart.

FIG. 12 shows an example of another embodiment of the present invention, and (a)
Is a perspective view, and (b) is a flowchart.

FIG. 13 shows an example of another embodiment of the above, and (a)
Is a perspective view, and (b) is a flowchart.

FIG. 14 shows an example of another embodiment of the above, and (a)
Is a perspective view, and (b) is a flowchart.

FIG. 15 shows an example of another embodiment of the present invention, and (a)
Is a partial perspective view, (b) is a front view, and (c) is a side view.

FIG. 16 shows an example of another embodiment of the above, and (a)
Is a partial perspective view, and (b) is a front view.

FIG. 17 is a perspective view showing a part of the heating object band according to the third embodiment;

FIG. 18 is a sectional view showing an example of another embodiment of the above.

FIG. 19 shows an example of another embodiment of the above, and (a)
Is a partial perspective view, and (b) is a sectional view.

FIG. 20 is a sectional view showing an example of another embodiment of the above.

FIG. 21 shows an example of another embodiment of the above, and (a)
Is a partial perspective view, and (b) is a sectional view.

FIG. 22 is a sectional view showing an example of another embodiment of the above.

FIG. 23 shows an example of another embodiment of the above, and (a)
Is a partial perspective view, and (b) is a sectional view.

24A and 24B show a conventional example, in which FIG. 24A is a perspective view, and FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 object to be heated 2 pedestal 3 heat generating part 4 heat absorbing part 5 electrode 6 air outlet 7 core part 8 coil 9 coil 10 heat treatment part before molding 11 heat treatment part after molding A heat radiating part B heat radiating part

Claims (21)

[Claims] 1. A molding heat treatment method for heating an object to be heated having a complicated shape formed by molding a metal thin plate and press-forming the heated object to be heated, wherein the metal has a higher heat capacity than the object to be heated. A molding heat treatment method comprising: forming a pedestal, arranging an object to be heated in contact with the pedestal, heating the object to be heated and the pedestal by high-frequency induction heating, and conducting heat from the pedestal to the object to be heated. 2. A molding heat treatment method for heating an object to be heated having a complicated shape formed by molding a metal thin plate and press-forming the heated object to be heated, wherein a pedestal having a metal heating part is formed. The object to be heated is placed on the pedestal, and the heat-generating part is brought into contact with a part of the object to be radiated easily, the object to be heated and the heat-generating part are heated by high-frequency induction heating, and the part of the object to be radiated easily from the heat-generating part. A molding heat treatment method characterized by conducting heat to the mold. 3. A molding heat treatment method for heating an object to be heated having a complicated shape formed by molding a metal thin plate and press-forming the heated object, the heat-generating portion made of metal and the heat-absorbing portion made of ceramic. Forming a pedestal having an object to be heated, arranging the object to be heated on the pedestal, contacting the heat-generating portion with a portion of the object to be radiated easily and a heat absorbing portion to a portion of the object to be radiated that is difficult to radiate, A molding heat treatment method characterized in that a heat generating portion is heated by high frequency induction heating to conduct heat from the heat generating portion to a portion of the object to be radiated easily and to conduct heat from a portion of the object to be radiated hard to a heat absorbing portion. . 4. A forming heat treatment method for heating an object to be heated having a complicated shape formed by molding a metal thin plate and press-forming the heated object to be heated. Is placed on the pedestal, the electrode is brought into contact with the part of the object to be radiated easily, the object is heated by high-frequency induction heating, and the electrode is heated from the electrode to the part of the object to be radiated easily to generate heat. Molding heat treatment method. 5. A forming heat treatment method for heating a heated object having a complicated shape formed by molding a thin metal plate and forming the heated object under pressure by forming a pedestal having an air outlet. The heated object is placed on the pedestal, the part where the heat is hardly dissipated from the heated object and the air ejection port are opposed to each other. A forming heat treatment method characterized by spraying and cooling. 6. A molding heat treatment method for heating an object to be heated having a complicated shape formed by molding a metal thin plate and press-forming the heated object to be heated, wherein a pedestal having a ferrite core is formed. , Place the object to be heated on the pedestal, position the core portion corresponding to the part of the object to be radiated easily,
Forming heat treatment characterized by heating an object to be heated by high-frequency induction heating and, during high-frequency induction heating, generating heat in a portion of the object to be radiated easily with magnetic flux concentrated on a core portion and a portion of the object to be radiated easily. Processing method. 7. A forming heat treatment method for heating an object to be heated having a complicated shape formed by molding a thin metal plate, and press-forming the heated object to be heated. And a pedestal with a ferrite core, place the object to be heated on the pedestal, contact the heat-generating part with the part of the object that is easy to radiate heat, and contact the heat-absorbing part with the part of the object that is difficult to radiate heat. Then, the core is positioned corresponding to the portion of the object to be radiated easily, the object to be heated and the heat generating portion are heated by high-frequency induction heating, and the heat is conducted from the heat generating portion to the portion of the object to be radiated easily. Heat is conducted from the part of the object to be radiated that is difficult to dissipate heat to the heat absorbing part, and magnetic flux concentrated on the core and the part of the object to be radiated easily during high-frequency induction heating generates heat in the part of the object to be radiated easily. And molding Heat treatment method. 8. The temperature of the object to be heated is measured, and the pedestal is moved with respect to the object to be heated based on the measurement result so that the heat-generating portion of the pedestal is brought into contact with a portion where the temperature of the object to be heated is low. The molding heat treatment method according to claim 2, wherein: 9. The temperature of the object to be heated is measured, and based on the measurement result, the heating portion of the pedestal is brought into contact with the portion where the temperature of the object is low, or the portion where the temperature of the object is high is The molding heat treatment method according to claim 3, wherein the pedestal is moved with respect to the object to be heated so that the heat absorbing portion of the pedestal is brought into contact. 10. The molding heat treatment process according to claim 4, wherein the temperature of the object to be heated is measured, and the amount of electricity supplied to a portion of the object to be radiated easily is adjusted based on the measurement result. Method. 11. The apparatus according to claim 5, wherein the temperature of the object to be heated is measured, and the amount of air blown to a portion of the object to be heated that is unlikely to radiate heat is adjusted based on the measurement result. Forming heat treatment method. 12. A temperature of the object to be heated is measured, and based on the measurement result, the pedestal is positioned with respect to the object to be heated such that the core portion of the pedestal is positioned corresponding to a portion where the temperature of the object to be heated is low. The molding heat treatment method according to claim 6, wherein 13. The temperature of the object to be heated is measured, and based on the measurement result, the heating portion of the pedestal is brought into contact with the portion where the temperature of the object is low or the portion where the temperature of the object is low. The pedestal is moved relative to the object to be heated such that the core portion of the pedestal is positioned correspondingly or the heat absorbing portion of the pedestal is brought into contact with a portion where the temperature of the object to be heated is high. 8. The molding heat treatment method according to 7. 14. A heating device comprising: a first coil for heating an object to be heated and a pedestal by high-frequency induction heating; and a second coil for heating the pedestal by high-frequency induction heating. The heating object and the pedestal are heated by high-frequency induction heating, the temperature of the object to be heated is measured, and based on the measurement result, a part of the pedestal that is in contact with the low temperature portion of the object to be heated is heated by the second coil. 2. The method according to claim 1, wherein the second coil is moved relative to the pedestal.
3. The method for forming and heat-treating according to item 1. 15. A heating device comprising: a first coil for heating an object to be heated and a base by high-frequency induction heating; and a second coil for heating the base by high-frequency induction heating. The pedestal and the second coil are arranged so that a part of the pedestal that comes into contact with the easy part is heated by the second coil, and the object to be heated and the pedestal are heated by the first coil by high-frequency induction heating. 2. The molding heat treatment method according to claim 1, wherein the temperature of the second coil is measured, and the amount of current supplied to the second coil is adjusted based on the measurement result. 16. In continuously applying a forming heat treatment process to a plurality of continuous heating objects, a pre-forming heat treatment portion is integrally formed on a pedestal, and an untreated heating object is brought into contact with the pre-forming heat treatment portion. The unprocessed object to be heated and the pre-molding heat treatment section are heated by high-frequency induction heating for heating the pedestal, and heat is transferred from the pre-molding heat treatment section to the untreated object to be heated. 3. The method for forming and heat-treating according to item 1. 17. The forming heat treatment method according to claim 16, wherein at least one of a pedestal having a ferrite core portion and a pre-forming heat treatment portion having a ferrite core portion is used. 18. A method for continuously forming and heat-treating a plurality of objects to be heated, wherein a heat-treating portion is formed integrally with the pedestal after forming, and the object to be heated after pressure-forming on the pedestal is formed. The object to be heated after pressure molding and the heat-treated part after molding are heated by high-frequency induction heating, which is placed in contact with the heat-treated part and heats the pedestal, and heat is transferred from the heat-treated part after molding to the object to be heated after pressure molding. The molding heat treatment method according to claim 1, wherein: 19. The molding heat treatment method according to claim 18, wherein at least one of a pedestal having a ferrite core and a post-molding heat treatment having a ferrite core is used. 20. A method for continuously heating a plurality of objects to be heated, wherein a pre-molding heat treatment part and a post-molding heat treatment part are integrally formed on a pedestal, and an untreated heating object is formed in the pre-molding heat treatment part. The object to be heated, which is placed in contact with and pressed by the pedestal, is placed in contact with the heat treatment section after molding, and the untreated object to be heated and the heat treatment section before molding are pressed by high frequency induction heating to heat the pedestal. The heated object after molding and the heat-treated part after molding are heated to conduct heat from the heat-treated part before molding to the untreated heated object and from the heat-treated part after molding to the heated object after pressure molding. The molding heat treatment method according to claim 1. 21. At least one of a pedestal having a core part made of ferrite, a heat treatment part before molding having a core part made of ferrite, and a heat treatment part after molding having a core part made of ferrite is used. 21. The molding heat treatment method according to 20.