KR20130093458A - Induction heating apparatus - Google Patents

Abstract

PURPOSE: An induction heating device is provided to uniformly heat a conductive board in a width direction, thereby preventing the temperature degradation of an end part. CONSTITUTION: Through a return route, a conductive board is returned. A first flat coil (3) is disposed in the upper side of the return route. A second flat coil (4) is disposed in the lower side of the return route. A first circumference magnetic path member (5) is disposed around the first flat coil. A second circumference magnetic path member (6) is disposed around the second flat coil.

Description

Induction Heating Equipment {INDUCTION HEATING APPARATUS}

The present invention relates to an induction heating apparatus for induction heating of, for example, a metal belt or a metal sheet.

Conventionally, induction heating of a metal belt, a metal sheet, or the like is performed by an induction heating device of a solenoid coil method or a transverse coil method.

However, when induction heating of a metal sheet with a medium frequency power supply of 50 Hz to 1000 Hz using this induction heating apparatus, it is necessary to construct a magnetic circuit having a relatively low magnetoresistance. The larger the magnetoresistance, the lower the power factor and the worse the heating efficiency.

Moreover, in induction heating of a metal sheet in the conventional induction heating apparatus, there exists a problem that both ends of the direction (width direction) orthogonal to the conveyance direction of a metal sheet become a low temperature because temperature rise is suppressed. In particular, in the induction heating apparatus of the hydraulic pressurization system which sends out the heated object by hydraulic pressure, it is difficult to circulate the magnetic flux generated by the coil outside the hydraulic seal structure part, and to the outside of the seal structure part. There is a problem that there is a disadvantage that the temperature of the metal sheet to be located is lowered.

[Patent Document 1] Japanese Patent Application Laid-Open No. 4-147596

Then, this invention is made | formed in order to solve the said problem, The main objective is to provide the induction heating apparatus which can heat the conductive plate materials, such as a metal sheet, uniformly over the whole.

That is, the induction heating apparatus which concerns on this invention is an induction heating of a conductive plate material in the medium frequency of 50 Hz-1000 Hz, and is arrange | positioned above the conveyance path to which the said conductive plate material is conveyed, and the said conveyance path, The said conveyance to a center part A first plate-shaped coil provided with a passage perpendicular to the passage, a second plate-shaped coil disposed below the conveying passage, and having a ruler orthogonal to the conveying passage at a central portion thereof, and the first plate-shaped coil. A first outer raceway member disposed around the coil and forming an outer raceway for guiding the magnetic flux generated by the first plate-shaped coil to the left and right outer side of the conveying path, and the circumference of the second plate-shaped coil; An outer raceway for guiding the magnetic flux generated by the second plate-shaped coil to the left and right outside of the conveyance passage, and connected to the first outer runner member. And a second outer runner member, wherein the magnetic flux generated by the first and second flat coils is conveyed to the transfer path by the first outer runner member and the second outer runner member. Characterized in that configured to pass through. In addition, the right and left both ends of an electroconductive board material are the both ends of the width direction of an electroconductive board material.

In this case, the magnetic flux generated in the first and second flat coils circulates through the outer circumferential path from the center of the coil, causing an induced current to occur in the conductive plate between the first and second flat coils. The conductive plate is then heated. In particular, since the first and second outer runner members extend the outer runners on the left and right outer sides of the conveyance passage, and the first and second outer runner members are connected to each other, the left and right ends of the conductive plate are heated in the same manner as the center part. Not only can it be made possible, but also the magnetic resistance to an outer periphery can be made small. Moreover, by adjusting the dimension of the member by the first and second outer runners, the horizontal dimension of the conveyance passage can be appropriately set.

In addition, the induction heating apparatus according to the present invention is a induction heating of a conductive plate at a medium frequency of 50 Hz to 1000 Hz, and is arranged on an upper side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate at the center thereof. It is arrange | positioned around the said 1st flat plate shape coil, and the 2nd flat plate shape coil arrange | positioned under the said shape | plate coil, the lower side of the said electroconductive board material, and the core which is orthogonal to the said electroconductive plate material, and the said 1st flat plate shape coil, A first outer runner member forming an outer runner passage through which the magnetic flux generated is passed; and a second outer runner disposed around the second flat coil, and forming an outer runner passage through which the magnetic flux generated by the second flat coil is passed. Concentric with the first plate-shaped coil around the outer rotor member and the magnetic metal container disposed around the first outer rotor member or the first outer rotor member. A first outer coil wound in a shape and a second outer coil wound concentrically with the second flat coil around the magnetic metal container disposed around the second outer rotor member or the second outer rotor member. The magnetic flux generated by the first and second outer circumferential coils may pass through the left and right ends of the conductive plate.

With such a configuration, the central portion of the conductive plate can be heated by the first and second flat coils. In addition, since the first and second outer coils are provided around the member and the magnetic metal container, the left and right ends of the conductive plate are formed by the magnetic flux generated by the first and second outer coils. Can be heated. In addition, it is possible to control the temperature distribution in the width direction of the conductive plate by adjusting the energization amount of the first and second flat coils and the energization amount of the first and second outer coils.

In addition, the induction heating apparatus according to the present invention is a induction heating of a conductive plate at a medium frequency of 50 Hz to 1000 Hz, and is disposed on an upper side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate at the center thereof. It is provided around the said 1st flat plate shape coil, and the 2nd flat plate shape coil arrange | positioned under the said shape | mold coil and the said electrically conductive plate material, and the center path provided with the magnetic path orthogonal to the said electroconductive plate material, and with the said 1st flat plate shape coil A first outer runner member forming an outer runner through which the generated magnetic flux passes, and a second outer runner provided around the second flat coil and forming an outer runner through which the magnetic flux generated by the second flat coil passes. A member, a magnetic metal container disposed around the first outer racer member or the first outer racer member, and the second outer racer member or the second outer racer. An iron core member provided in contact with the left and right outer surfaces of the conductive plate in the magnetic metal container disposed around the magnetic path member, and an outer coil wound around the iron core member, and the outer circumference by the iron core member. The magnetic flux generated by the coil is configured to pass through the left and right ends of the conductive plate.

With such a configuration, the central portion of the conductive plate can be heated by the first and second flat coils. In addition, since the iron core member is provided in contact with the first and second outer racer members or the magnetic metal container, and the outer coil is wound around the iron core member, the magnetic flux generated by the outer coil is reduced to the first and second outer racer members. Alternatively, the magnetic metal container and the left and right end portions of the conductive plate can be passed, and both left and right ends of the conductive plate can be heated. In addition, it is possible to control the temperature distribution in the width direction of the conductive plate by adjusting the energization amount of the first and second flat coils and the energization amount of the outer circumferential coil.

In the induction heating apparatus described above, the first flat plate coil and the second flat plate coil are divided into a plurality of flat plate split coils in order to further uniformize the temperature distribution on the left and right sides of the conductive plate. It is preferable that the plate-shaped split coils are arranged to be shifted from side to side. In particular, the first plate-shaped coil and the second plate-shaped coil are divided into two plate-shaped split coils having the same configuration and the same shape, and the central axis of one plate-shaped split coil is divided into the other plate-shaped split coil. It is preferable to arrange | position so that it may become a position which divides the winding diameter of the winding coil of a coil into two.

In addition, the induction heating apparatus according to the present invention is a induction heating of a conductive plate at a medium frequency of 50 Hz to 1000 Hz, and is arranged on an upper side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate at the center thereof. A second flat coil having a shape coil, a second flat coil disposed at a lower side of the conductive plate, and having a magnetic path orthogonal to the conductive flat plate at a central portion thereof, and arranged around the first flat coil; A first outer raceway member which forms an outer raceway for guiding the magnetic flux generated by the outer side of the conductive plate, and the magnetic flux generated by the second plate-shaped coil to be disposed around the second plate-shaped coil. And a second outer runner member connected to the first outer runner member, the outer runner leading to the outer side of the first outer runner, and The member and the second outer runner member are configured such that the magnetic flux generated by the first and second flat coils passes through an end portion of the conductive plate.

In addition, the induction heating apparatus according to the present invention is a induction heating of a conductive plate at a medium frequency of 50 Hz to 1000 Hz, and is disposed on an upper side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate at the center thereof. It is provided around the said 1st flat plate shape coil, and the 2nd flat plate shape coil arrange | positioned under the said shape | mold coil and the said electrically conductive plate material, and the center path provided with the magnetic path orthogonal to the said electroconductive plate material, and with the said 1st flat plate shape coil A first outer runner member forming an outer runner through which the generated magnetic flux passes, and a second outer runner provided around the second flat coil and forming an outer runner through which the magnetic flux generated by the second flat coil passes. A member, a magnetic metal container disposed around the first outer racer member or the first outer racer member, and the second outer racer member or the second outer racer. An iron core member provided in contact with an outer surface of the conductive plate member in a magnetic metal container disposed around a magnetic path member, and an outer coil wound around the iron core member, and generated by the outer coil by the iron core member. The magnetic flux is configured to pass through an end portion of the conductive plate.

In order to insulate the heated conductive plate and the first and second flat coils, and to maintain the conductive plate using the heat insulating structure, the conductive plate is provided between the first flat plate coil and the conductive plate. A first heat insulating member for insulating heat from the second plate, and a second heat insulating member provided between the second plate-shaped coil and the conductive plate, and insulating heat from the conductive plate. It is preferable that a said 2nd heat insulating member hold | maintains the said electroconductive board material from the top and bottom. In this way, the structure of the apparatus can be simplified by eliminating the need for a holding mechanism for holding the conductive sheet material separately from the heat insulating member. Here, in order to reliably insulate and hold | maintain, it is preferable to hold | maintain by covering the whole periphery of the said electroconductive plate material with the said 1st heat insulating member and the said 2nd heat insulating member.

According to this invention comprised in this way, the temperature fall of the planar direction edge part of conductive board materials, such as a metal sheet, can be suppressed, and planarization of the conductive board material can be aimed at.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing which shows the cross section orthogonal to the conveyance direction of the induction heating apparatus which concerns on 1st Embodiment.
2 is a cross-sectional view showing a cross section orthogonal to the conveyance direction of the induction heating apparatus according to the second embodiment.
Figure 3 is a front view showing a partial cross section of the conventional induction heating apparatus of the hydraulic pressure system.
Fig. 4 is a graph showing the power factor-frequency characteristics when induction heating of SUS420 · thickness 1.6mm × width 300mm using a conventional induction heating apparatus of a conventional hydraulic pressure method.
Fig. 5 is a diagram showing the position of a temperature sensor when induction heating of SUS420 · thickness 1.6 mm × width 300 mm using the induction heating apparatus of the second embodiment.
The figure which shows the temperature rising characteristic of the b4 position at the time of induction heating of SUS420 and thickness 1.6mm x width 300mm using the induction heating apparatus of 2nd Embodiment.
Fig. 7 is a diagram showing the temperature analysis and average temperature distribution of the a position and the b position in the case where only the induction heating device of the second embodiment flows through the flat coil.
Fig. 8 is a diagram showing the temperature analysis and average temperature distribution of the a position and the b position in the case where the induction heating apparatus of the second embodiment is made to flow to both the flat coil and the outer coil.
9 is a cross-sectional view showing a cross section orthogonal to the conveyance direction of the induction heating apparatus according to the third embodiment.
10 is a cross-sectional view showing a cross section along a conveyance direction of an induction heating apparatus according to a third embodiment.
The top view which shows the flat coil of the induction heating apparatus which concerns on a modified embodiment.
The top view which shows the flat coil of the induction heating apparatus which concerns on a modified embodiment.
The top view which shows the flat coil of the induction heating apparatus which concerns on a modified embodiment.
14 is a longitudinal sectional view of an induction heating apparatus of a batch processing type according to a modified embodiment.
15 is a longitudinal sectional view of a batch processing type induction heating apparatus according to a modified embodiment;
16 is a cross sectional view of a batch processing type induction heating apparatus according to a modified embodiment;

EMBODIMENT OF THE INVENTION Below, embodiment of the induction heating apparatus which concerns on this invention is described with reference to drawings.

First Embodiment

The induction heating apparatus 100 according to the first embodiment continuously conducts induction heating of a conductive plate such as a thin sheet metal sheet at a frequency of 50 Hz to 1000 Hz. As an electroconductive board material, it forms the plate shape or sheet form which consists of metals, such as aluminum, for example. In addition, the aluminum sheet is difficult to induction heating in the conventional medium frequency induction heating apparatus.

Specifically, as shown in FIG. 1, the conveying path 2 through which the metal sheet W is conveyed, and the magnetic path disposed above the conveying path 2 and orthogonal to the conveying path 2 in the center portion are formed. A second flat coil 3 provided with a first flat coil 3 and a second flat coil disposed at a lower side of the conveying passage 2 and having a magnetic path orthogonal to the conveying passage 2 at a central portion thereof; A first outer raceway member 5 arranged around the periphery and forming an outer raceway for guiding the magnetic flux generated by the first flat coil 3 to the left and right outside of the conveying passage 2, and the second outer raceway member 5; The second outer raceway member 6 is disposed around the plate-shaped coil 4 and forms an outer raceway for guiding the magnetic flux generated by the second plate-shaped coil 4 to the left and right outside of the conveying passage 2. Equipped.

The first flat coil 3 and the second flat coil 4 have the same configuration and the same shape as each other, and have a substantially rectangular shape in plan view. At the center of these flat coils 3 and 4, center cores 31 and 41 are formed to form coil centers. Moreover, the dimension of the width direction orthogonal to the conveyance direction of the flat plate coils 3 and 4 is substantially equal to or larger than the dimension of the conveyance path 2 in the width direction. By configuring in this way, it is comprised so that the dimension of the width direction of the plate-shaped coils 3 and 4 may become larger than the dimension of the width direction of the metal sheet W conveyed by the conveyance path 2. As shown in FIG. In addition, an insulating plate 7 is provided between the first flat coil 3 and the second flat coil 4 and the conveying passage 2, and between the coils 3 and 4 and the metal sheet W. To prevent short circuit. Moreover, the upper and lower surfaces (upper and lower borders) of the conveyance passage 2 are formed by this insulating plate 7.

The first outer runner member 5 and the second outer runner member 6 are disposed around the first flat coil 3 and the second flat coil 4, respectively. Specifically, the first outer raceway member 5 faces the upper surface, the front and rear side surfaces (sides opposite to the direction along the conveying direction) and the left and right side surfaces (the direction perpendicular to the conveying direction) of the first flat coil 3. And a coil container made of a magnetic metal that accommodates the first flat coil 3, thereby forming a substantially hollow rectangular parallelepiped shape in which the lower surface is opened. In addition, the second outer raceway member 6 is a coil container made of a magnetic metal that accommodates the second flat plate coil 4 by covering the front, rear, left and right side surfaces of the second flat plate coil 4, The upper surface forms a substantially hollow rectangular parallelepiped shape.

Moreover, in this embodiment, in order to avoid the heat_generation | fever of the members 5 and 6 by the 1st and 2nd outer runners, the slit S for preventing short-circuit current is formed in the 1st and 2nd outer runners. Doing. In addition, in order to avoid the heat generation of the first and second outer runner members 5 and 6, the first and second outer runner members 5 and 6 may be formed by laminating an insulating thin plate magnetic body such as silicon steel. In the case where the members 5 and 6 are also actively heated by the first and second outer runners for use in auxiliary heating or the like, it is conceivable to employ a magnetic body in which the depth of the solid or the slit is adjusted.

In addition, the left and right side walls 51 and 52 of the first outer raceway member 5 are located outside the conveying passage 2, and in the present embodiment, the left and right side walls 51 and 52 are the left and right sides of the conveying passage 2. It forms the side (boundary of right and left). Similarly, the left and right sidewalls 61 and 62 of the second outer raceway member 6 are located outside the conveying passage 2, and the left and right sidewalls 61 and 62 are the left and right side surfaces of the metal plate conveying passage 2 (left and right). Form a boundary). As described above, in the present embodiment, the left and right side walls 51 and 52 of the first outer raceway member 5 and the left and right side walls 61 and 62 of the second outer raceway member 6 are positioned in the width direction of the conveyance passage 2. Specify the dimensions.

The lower end portions of the left and right side walls 51 and 52 of the first outer raceway member 5 and the upper end portions of the left and right side walls 61 and 62 of the second outer raceway member 6 are connected to each other. By connecting the first outer runner member 5 and the second outer runner member 6 in this manner, the magnetic resistance of the magnetic flux through which the magnetic flux generated by the first and second flat coil 3 and 4 passes is reduced. In addition, the heating efficiency is improved by increasing the power factor.

In the induction heating apparatus 100, the magnetic flux generated by the flat coils 3 and 4 is formed from the coil center formed by the central iron cores 31 and 41 provided at the coil center to the outer runner members 5 and 6. Circulate through the outer periphery formed by). As a result, an induced current is caused to occur in the metal sheet W between the first flat coil 3 and the second flat coil 4, and the metal sheet W is heated. Further, since the left and right sidewalls 51 and 52 of the first outer raceway member 5 and the left and right sidewalls 61 and 62 of the second outer raceway member 6 extend to the outside of the metal sheet W, the first And the path | route by the 2nd flat coil 3, 4 passes through the left and right both ends of the metal sheet W conveyed to the conveyance path 2, and can reliably heat both the left and right ends of the metal sheet W. As shown in FIG.

≪ Second Embodiment >

The induction heating apparatus 100 according to the second embodiment pressurizes the insulator W, which is a workpiece, by a pair of upper and lower metal seat belts B, and presses the metal seat belts B with a frequency of 50 Hz to Induction heating at a medium frequency of 1000 Hz causes heating of the heated object W. 2, the same code | symbol is attached | subjected to the member corresponding to the said 1st Embodiment.

Specifically, as shown in FIG. 2, this is a pair of upper and lower metal seat belts B (for example, a metal thin plate of SUS400) that forms the conveying passage 2 through which the heated object W is conveyed, and this metal. It is disposed above the seat belt (B), is disposed below the first plate-shaped coil (3) and the metal seat belt (B) provided with a magnetic path perpendicular to the metal seat belt (B) in the center, the metal in the center The magnetic flux generated by the first plate-shaped coil 3 is passed around the second plate-shaped coil 4 and the first plate-shaped coil 3 provided with a path perpendicular to the seat belt B. The outer coil is formed around the first coil container 5 and the second flat coil 4 to form an outer runner to pass the magnetic flux generated by the second flat coil 4. The second coil container 6 and the pressurizing structure 8 for pressurizing the to-be-heated object W by a pair of upper and lower metal seat belts B are provided. .

Specifically, the pressurizing structure 8 includes a first hydraulic container 81 made of a magnetic metal for accommodating the first coil container 5, and a magnetic metal for accommodating the second coil container 6 (for example, SS400). Hydraulic seals (83, 84) made of an insulating material provided between the second hydraulic container (82), the first and second hydraulic containers (81, 82) and the metal seat belt (B); Hydraulic oil 85 enclosed in the 1st and 2nd hydraulic containers 81 and 82 is provided. In this way, when the hydraulic pressure mechanism is added to the induction heating apparatus 100, since the high pressure hydraulic pressure is applied, the hydraulic containers 81, 82 and the hydraulic seals 83, 84 on the outer side of the coil container 5, 6, respectively. ) Is arranged so that the dimension in the width direction of the coil housings 5 and 6 is smaller than the dimension in the width direction of the metal seat belt B. For this reason, the part which came out to the left-right outer side from the hydraulic seals 83 and 84 in the metal seat belt B is not heated, and the temperature rise of both left and right ends of the metal seat belt B becomes largely low.

However, the induction heating apparatus 100 according to the second embodiment includes the first outer coil 9 wound concentrically with the first flat coil 3 on the outer side of the first outer raceway member 5, and the second outer circumference. The second outer coil 10 concentrically wound with the second flat coil 4 on the outside of the magnetic member 6 is provided.

Specifically, the first outer coil 9 is provided around the first hydraulic container 81 provided around the first outer race member 5, and is provided around the second outer race member 6. The second outer circumferential coil 10 is provided around the second hydraulic container 82. The first outer coil 9 is provided by winding it around the first hydraulic container 81 in a concentric manner with the first flat coil 3. The second outer circumferential coil 10 is provided by winding it around the second hydraulic container 82 in a concentric manner with the second flat coil 4.

Then, the first cover member 11 made of a magnetic metal covering the upper surface and the side circumferential surface of the first outer coil 9 is provided around the first outer coil 9, and the second outer coil 10 is provided. The second cover member 12 made of a magnetic metal covering the lower surface and the side circumferential surface of the second outer circumferential coil 10 is provided around the. Moreover, the 1st cover member 11 and the 2nd cover member 12 are provided in the 1st hydraulic container 81 and the 2nd hydraulic container 82, respectively. In addition, the first cover member 11 and the second cover member 12 are formed with a slit S to prevent heat generation.

By the first and second cover members 11 and 12, the magnetic flux generated by the first and second outer circumferential coils 9 and 10 is transferred to the side wall of the first hydraulic container 81 and the second hydraulic container 82. Through the side wall of the metal seat belt (B) to pass through the left and right both ends are formed. Thereby, the left and right both ends of the metal seat belt B can be heated reliably.

In addition, the free ends of the first cover member 11 (lower end of the side wall) and the free ends of the second cover member 12 (upper end of the side wall) are connected to each other to form the first and second outer coils 9 and 10. The magnetic resistance generated by the magnetic flux generated by the magnetic flux may be reduced, and the heating efficiency may be improved by increasing the power factor.

Here, the power factor-frequency characteristic in the case of induction heating of SUS420 having a thickness of 1.6 mm × width 300 mm using the conventional induction heating apparatus of the conventional hydraulic pressure system shown in Fig. 3 is shown in Fig. 4. As can be seen from FIG. 4, the power factor is approximately the same at a frequency of 500 Hz or more, and it can be seen that a medium frequency is suitable for induction heating of a metal sheet (especially SUS420).

Next, the experimental result when induction heating of SUS420 of thickness 1.6mm x width 300mm using the induction heating apparatus of 2nd Embodiment is shown. In this experiment, the central iron core of the plate-shaped coil uses two involute iron cores (iron cores formed by stacking a plurality of magnetic steel plates having curved portions curved in an involute curve shape). . In addition, the installation position of a temperature sensor is as showing in FIG.

First, the temperature rising characteristic at the temperature sensor position b4 is shown in FIG. 6 using the induction heating apparatus of 2nd Embodiment. At this time, an AC voltage of 200 V (frequency 540 Hz) was applied to the flat coil, and an AC voltage of 300 V (frequency 540 Hz) was applied to the outer coil.

Next, in the induction heating apparatus of the second embodiment, the temperature analysis of the a position and the b position and the average temperature distribution of the a position and the b position in the case where only the flat coil is flowed are shown in FIG. 7. In addition, an AC voltage of 200 V (frequency 540 Hz) was applied to the flat coil. At this time, the difference between the highest temperature and the lowest temperature in the average temperature distribution in the width direction of the metal seat belt was 70.8 ° C.

On the other hand, in the induction heating apparatus of the second embodiment, the temperature analysis of the a position and the b position and the average temperature distribution of the a position and the b position when flowing to both the flat coil and the outer coil are shown in FIG. 8. . In addition, an AC voltage of 200 V (frequency 540 Hz) was applied to the flat coil and an AC voltage of 300 V (frequency 540 Hz) was applied to the outer coil. At this time, the difference between the highest temperature and the lowest temperature in the average temperature distribution in the width direction of the metal seat belt was 17.1 ° C. Thus, it turns out that it flows not only flat coil but also outer coil, and makes it homogenize in the temperature distribution of the width direction of a metal seat belt.

In addition, in the induction heating apparatus 100 of the second embodiment, the width of the metal seat belt B is adjusted by adjusting the energization amount of the flat coils 3 and 4 and the energization amount of the outer coils 9 and 10. It is possible to control the temperature distribution in the direction.

≪ Third Embodiment >

In the induction heating apparatus 100 according to the third embodiment, similarly to the second embodiment, the insulator W, which is a heated object, is pressed with a pair of upper and lower metal seat belts B, and the metal seat belt ( Induction heating of B) at a medium frequency with a frequency of 50 Hz to 1000 Hz to heat the heated object W. 9 and 10, the same reference numerals are given to members corresponding to the first and second embodiments.

However, the induction heating apparatus 100 of 3rd Embodiment differs in the structure of the outer periphery coils 9 and 10 and the cover member 11 and 12 of the said 2nd Embodiment, as shown to FIG. 9 and FIG. An iron core member 13 provided in contact with the left and right outer surfaces of the first hydraulic vessel 81 and the second hydraulic vessel 82, respectively, and an outer coil 14 wound around the iron core member 13.

The iron core member 13 is a cut-core type iron core, and one cut surface is provided in surface contact with the side surface of the first hydraulic container 81, and the other cut surface It is provided in surface contact with the side surface of this 2nd hydraulic container 82. Moreover, as shown in FIG. 10, the iron core member 13 and the outer coil 14 are provided in plural from the left and right (four in the left and right in FIG. 10) along the conveyance direction of the to-be-heated object W. Moreover, as shown in FIG.

By the iron core member 13, magnetic flux generated by the outer circumferential coil 14 passes through the side wall of the first hydraulic container 81 and the side wall of the second hydraulic container 82 at both left and right ends of the metal seat belt B. A passage is formed. Thereby, the left and right both ends of the metal seat belt B can be heated reliably.

In addition, in order to suppress the heat generation of the first and second hydraulic containers 81 and 82 and to increase the heat generation ratio of both the left and right ends of the metal seat belts B, the first and second hydraulic containers 81 and 82 The slit S having an appropriate depth is machined on the contact surface of the iron core member so as to reduce the short circuit current.

In addition, as in the second embodiment, the temperature distribution in the width direction of the metal seat belt B is controlled by adjusting the energization amount of the flat coils 3 and 4 and the energization amount of the outer coil 14. It becomes possible.

In addition, this invention is not limited to said each embodiment.

For example, in the second embodiment, the outer coils 9 and 10 and the cover members 11 and 12 are provided on the premise of the hydraulic pressurized induction heating apparatus. And the outer coils 9 and 10 and the cover members 11 and 12 may be provided. In this case, since the induction heating apparatus 100 does not have the hydraulic containers 81 and 82, the outer coils 9 and 10 are provided around the first and second outer runner members 5 and 6, The first and second cover members 11 and 12 are provided on the members 5 and 6 as the first and second outer runners.

In the third embodiment, the iron core member 13 and the outer circumferential coil 14 are provided on the premise of the induction heating apparatus of the hydraulic pressure system. In the first embodiment, the iron core member 13 is provided. And the outer coil 14 may be provided. In this case, since the induction heating apparatus 100 does not have the hydraulic containers 81 and 82, the iron core member 13 is provided to contact the side surfaces of the members 5 and 6 as the first and second outer runners, respectively.

As shown in FIG. 11, the first flat coil 3 and the second flat coil 4 may be divided into a plurality of flat split coils, and the plurality of flat split coils may be arranged to be shifted left and right. . FIG. 11 shows a case where the flat coils 3 and 4 are divided into two flat coils C1 and C2 having the same configuration and the same shape. The two flat split coils C1 and C2 form a substantially rectangular shape in plan view, similar to the flat coils 3 and 4, and have a central core (C11, C12) that forms a coil center at its center. ) Is provided. The two flat plate split coils C1 and C2 have a central axis disposed in the same direction, and the central axis of one flat plate split coil C1 is wound around the other flat plate split coil C2. It arrange | positions so that it may become a position which divides the coiling diameter of a coil into two. In other words, when the width dimension of the center cores C11 and C12 of the plate-shaped split coils C1 and C2 is 2S and the winding diameter of the wound coil of the plate-shaped split coils C1 and C2 is D, It is arrange | positioned so that a shift | offset | difference width may become D / 2 + S. As a result, the temperature distribution on the left and right sides of the metal sheet can be further uniformized.

As shown in FIG. 12, the first flat coil 3 and the second flat coil 4 are divided into a plurality of flat split coils C, and at least one in the width direction perpendicular to the conveying direction. The coil unit Cx formed by arranging the two flat plate-shaped split coils C is arranged in multiple stages along the conveying direction, and at least one coil unit Cx forms the flat plate-shaped split unit constituting the coil unit Cx. You may arrange | position so that the coil C may blow out from the conductive board | plate material W, such as a metal sheet, outward in the width direction. Specifically, the plate-shaped split coils Cx constituting two adjacent coil units Cx are arranged to be shifted in the width direction.

In Fig. 12, the first flat coil 3 and the second flat coil 4 are divided into four flat split coils C1 to C4 having the same shape, and are divided into two in the width direction perpendicular to the conveying direction. The coil units Cx1 and Cx2 formed by arranging two flat coils C1 and C2, C3 and C4 are arranged in two steps along the conveying direction. And the right part of the flat plate-shaped split coil C1 of the right part which comprises the coil unit Cx1 of the conveyance upstream is arrange | positioned so that it may blow out to the right rather than the right end part of the conductive board material W. As shown in FIG. Moreover, it is arrange | positioned so that the left part of the flat plate-shaped split coil C4 of the left which comprises the coil unit Cx2 of conveyance downstream may be called out from the left end of the conductive board | plate material W.

Here, when the width dimension of the center iron core of plate-shaped split coils C1 to C4 is 2S, and the winding diameter of the wound coil of plate-shaped split coils C1 and C2 is D, plate-shaped split coils C1 to C4 The position of the distance "D / 2 + S" from the center in E is the largest amount of heat generated.

Therefore, one end or the other end in the width direction of the conductive plate W is formed by the " D / 2 + S " of the plate-shaped split coil C that constitutes the coil unit Cx in at least one coil unit Cx. It is configured to pass through the position of ". In this case, one end part or the other end part of the width direction of the electroconductive board material W can be heated efficiently. In FIG. 12, the right end of the conductive plate W passes through the position of “D / 2 + S” of the plate-shaped split coil C1, and the left end of the conductive plate W is the flat plate split coil C4. Passes the position of "D / 2 + S". In other words, it is arrange | positioned so that the shift width | variety of the coil unit Cx1 of the conveyance upstream and the coil unit Cx2 of the conveyance downstream may become D / 2 + S.

In addition, the plate-shaped split coil C (C1 in FIG. 12) is blown out at the right end of the conductive plate W and the plate-shaped split coil C (in FIG. 12) with respect to the left end of the conductive plate W. The amount of C4) is blown out to be the same. Thereby, the temperature of the right end part and the temperature of the left end part of the electroconductive board material W can be made substantially the same.

By arranging such flat plate-shaped split coils C1 to C4, the widthwise both ends of the conductive plate W can be heated in the same manner as the center portion of the conductive plate W, and in the width direction of the conductive plate W The temperature distribution can be made uniform.

In addition to FIG. 12, the coil units Cx may be arranged in three or more stages along the conveying direction, and each coil unit Cx may be provided with one flat split coil C or three or more flat split coils C. You may comprise with. At this time, the shift | offset | difference amount of the plate-shaped split coil C of the adjacent coil unit Cx is adjusted, and the temperature distribution in the width direction of the electroconductive board | plate material W is equalized. FIG. 13 shows a case where three stages of coil units Cx including three flat coils C are arranged. In FIG. 13, the shift width between the coil unit Cx1 on the most upstream side of the conveyance and the coil unit Cx3 on the most downstream side of the transport becomes D / 2 + S, and the coil unit Cx2 on the midstream of the transport is in the middle of the misalignment width. It is arrange | positioned so that it may become (D / 4 + S / 2).

Moreover, when each coil unit Cx consists of two or more flat plate split coils C, the magnetic flux is adjusted and the width | variety of the electrically conductive board | plate material W is controlled by controlling the electric current which flows through each flat plate split coil C. The temperature distribution in the direction can also be controlled.

In addition, the plate-shaped split coils C constituting the coil unit Cx do not have to have the same shape, and in order to equalize the temperature distribution in the width direction, plate-shaped split coils of different sizes may be combined.

In addition, in the above embodiment, the induction heating apparatus of the conveyance treatment type for conveying and processing the conductive plate is applicable, but the present invention is also applicable to the induction heating apparatus of the batch treatment type for induction heating for each conductive plate.

In this case, as shown in FIG. 14, of the 1st flat plate shape coil 3 arrange | positioned above the electroconductive board | plate material W, and the magnetic path orthogonal to the electroconductive board | plate material W is provided in the center part, and the electroconductive board | plate material W of FIG. It is arrange | positioned below and arrange | positioned around the 2nd flat plate coil 4 and the 1st flat plate coil 3 by which the path | route orthogonal to the electroconductive board | plate material W was provided in the center, and the 1st flat plate coil 3 Is arranged around the first outer raceway member 5 and the second plate-shaped coil 4 to form an outer raceway that guides the magnetic flux generated by the magnetic flux generated by the outer side of the conductive plate W. The outer raceway which guides the magnetic flux generated by 4) to the outer side of the electroconductive board W is provided, and the 2nd outer runner member 6 connected with the 1st outer runner member 5 is provided. Then, the magnetic flux generated by the first and second plate-shaped coils 3 and 4 is caused by the first outer raceway member 5 and the second outer raceway member 6 to extend the planar end of the conductive plate W. As shown in FIG. It is configured to pass through. In addition, in FIG. 14, since the first outer raceway member 5 and the second outer raceway member 6 form a rectangular parallelepiped shape, when inductively heating the conductive plate W having a rectangular shape in plan view, Four side ends (circumferential edges) can be heated in the same manner as the central part of the conductive plate, and the temperature distribution in the planar direction of the conductive member can be made uniform.

Here, a first heat insulating member D1 is provided between the first flat coil 3 and the conductive plate W to insulate heat from the conductive plate W, and the second flat coil 4 and The second heat insulating member D2 is provided between the conductive plate materials W to insulate the heat from the conductive plate materials W. The 1st heat insulation member D1 is provided in the whole space enclosed by the insulating plate 7 provided in the lower surface of the 1st flat coil 3, and four side walls (side wall of front and rear, right and left). Moreover, the 2nd heat insulation member D2 is provided in the whole space enclosed by the insulating plate 7 provided in the upper surface of the 2nd flat coil 4, and four side walls (side wall of front, rear, right and left). And the 1st heat insulating member D1 and the 2nd heat insulating member D2 are comprised so that the electroconductive board material W may be hold | maintained from up and down. Specifically, the first heat insulating member D1 and the second heat insulating member D2 are held by covering the entire circumference of the conductive plate W. FIG. In this way, the structure of the apparatus can be simplified by eliminating the holding mechanism for holding the conductive plate W separately from the heat insulating members D1 and D2. Moreover, since the 1st heat insulation member D1 and the 2nd heat insulation member D2 hold | maintain by covering all surfaces of the electroconductive board material W, heat insulation and maintenance can be reliably performed.

15 and 16, the transfer processing type induction heating device of the third embodiment may be a batch processing type induction heating device. In this case, the first container 151 provided around the core 5 and the outer coil 14 to the first outer peripheral member 5 and the second container provided around the second outer peripheral member 6 ( It is comprised so that a plurality may be provided in four side surfaces (side of front, back, left and right) of 152, respectively. Even in this case, the conductive plate member W is held by the first heat insulating member D1 and the second heat insulating member D2. In addition, the iron core member 13 may be provided so as not to have the first and second containers 151 and 152 and to contact the side surfaces of the members 5 and 6 with the first and second outer runners, respectively.

In addition, this invention is not limited to the said embodiment, Needless to say that various deformation | transformation is possible in the range which does not deviate from the meaning.

100 ... Induction heating unit Conductive Plate (Metal Sheet)
2 … Return path 3. First flat coil
4 … 2nd flat coil
5 ... 1st outer runner member (1st magnetic metal container)
6 ... 2nd outer runner member (2nd magnetic metal container)
7 ... Insulation plate 8. Pressurized Structure
9 ... First outer coil 10. 2nd outsourcing coil
11 ... First cover member 12.. Second cover member
13 ... Iron core member 14. Outer coil
C1... Flat Split Coil C2. Flat Split Coil

Claims (17)

Induction heating of a conductive plate at a medium frequency of 50 kHz to 1000 kHz,
A conveying passage through which the conductive plate is conveyed;
A first flat coil disposed at an upper side of the conveying passage and provided with a magnetic path perpendicular to the conveying passage at a central portion thereof;
A second flat coil disposed at a lower side of the conveying passage and provided with a magnetic path perpendicular to the conveying passage at a central portion thereof;
A first outer raceway member disposed around the first plate-shaped coil and forming an outer raceway for guiding magnetic flux generated by the first plate-shaped coil to the left and right outside of the conveying passage;
An outer periphery disposed around the second flat coil and configured to guide the magnetic flux generated by the second flat coil to the left and right sides of the conveying passage; 2 is provided with a member as an outer runner,
Induced by the first outer rotor member and the second outer rotor member, the magnetic flux generated by the first and second plate-shaped coils pass through the left and right ends of the conductive plate conveyed to the conveying passage Heating device. The method according to claim 1,
An induction heating apparatus in which the first flat coil and the second flat coil are divided into a plurality of flat split coils, and the plurality of flat split coils are arranged to be shifted from side to side. The method according to claim 2,
The first flat coil and the second flat coil are divided into two flat split coils having the same configuration and the same shape, and the central axis of one flat split coil is different from the flat split coil of the other. An induction heating apparatus arranged so as to be a position for dividing the winding diameter of a wound coil into two. The method according to claim 1,
The first flat coil and the second flat coil are divided into a plurality of flat split coils, and the coil unit formed by arranging at least one flat split coil in a width direction orthogonal to the transfer direction is carried out. Therefore, the induction heating apparatus which arrange | positions in multiple stages and arrange | positions so that the plate-shaped split coil which comprises the said coil unit may be blown out from the said electroconductive board material in the width direction at least 1 coil unit. The method of claim 4,
An induction heating apparatus in which a widthwise end of the conductive plate passes in a position where the winding diameter of the wound coil in the flat split coil is divided by two in the flat split coil that is blown outward in the width direction from the conductive plate. Induction heating of a conductive plate at a frequency of 50 Hz to 1000 Hz,
A first flat coil disposed on an upper side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate in a central portion thereof;
A second flat coil disposed at a lower side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate at a central portion thereof;
A first outer runner member disposed around the first flat coil and forming an outer runner through which magnetic flux generated by the first flat coil is passed;
A second outer runner member disposed around the second flat coil and forming an outer runner through which magnetic flux generated by the second flat coil is passed;
A first outer coil wound concentrically with the first flat coil and around the magnetic metal container disposed around the first outer rotor member or the first outer rotor member;
A second outer coil wound concentrically with the second flat coil and around the magnetic metal container disposed around the second outer roller member or the second outer roller member;
Induction heating apparatus characterized in that the magnetic flux generated by the first and the second outer coil is configured to pass through the left and right ends of the conductive plate. The method of claim 6,
An induction heating apparatus in which the first flat coil and the second flat coil are divided into a plurality of flat split coils, and the plurality of flat split coils are arranged to be shifted from side to side. The method of claim 7,
The first flat coil and the second flat coil are divided into two flat split coils having the same configuration and the same shape, and the central axis of one flat split coil is different from the flat split coil of the other. An induction heating apparatus disposed so as to be a position for dividing the winding diameter of a wound coil into two. Induction heating of a conductive plate at a frequency of 50 Hz to 1000 Hz,
A first flat coil disposed on an upper side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate in a central portion thereof;
A second flat coil disposed at a lower side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate at a central portion thereof;
A first outer runner member provided around the first flat coil and forming an outer runner through which magnetic flux generated by the first flat coil is passed;
A second outer runner member provided around the second flat coil and forming an outer runner through which magnetic flux generated by the second flat coil passes;
Left and right outer surfaces of the magnetic metal container disposed around the first outer rotor member or the first outer rotor member, and the magnetic metal container disposed around the second outer rotor member or the second outer rotor member. Iron core members provided in contact with each other,
It is provided with an outer coil wound around the iron core member,
The magnetic flux generated by the outer coil by the iron core member is configured to pass through the left and right ends of the conductive plate material. The method according to claim 9,
An induction heating apparatus in which the first flat coil and the second flat coil are divided into a plurality of flat split coils, and the plurality of flat split coils are arranged to be shifted from side to side. The method of claim 10,
The first flat coil and the second flat coil are divided into two flat split coils having the same configuration and the same shape, and the central axis of one flat split coil is different from the flat split coil of the other. An induction heating apparatus disposed so as to be a position for dividing the winding diameter of a wound coil into two. Induction heating of a conductive plate at a frequency of 50 Hz to 1000 Hz,
A first flat coil disposed on an upper side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate in a central portion thereof;
A second flat coil disposed at a lower side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate at a central portion thereof;
A first outer runner member disposed around the first flat coil and forming an outer runner for guiding the magnetic flux generated by the first flat coil to the outside of the conductive plate;
A second disposed around the second plate-shaped coil to form an outer raceway that guides the magnetic flux generated by the second plate-shaped coil to the outside of the conductive plate, and is connected to the member by the first outer runner. Has a member as an outer runner,
Induction heating apparatus characterized in that the magnetic flux generated by the first and second plate-shaped coil through the first outer rotor member and the second outer rotor member through the end of the conductive plate. The method of claim 12,
A first heat insulating member provided between the first plate-shaped coil and the conductive plate, and insulating heat from the conductive plate;
A second heat insulating member provided between the second flat coil and the conductive plate, and insulating heat from the conductive plate;
Induction heating apparatus for the first heat insulating member and the second heat insulating member to hold the conductive plate from above and below. The method according to claim 13,
Induction heating apparatus that the first heat insulating member and the second heat insulating member is maintained by covering the entire circumference of the conductive plate. Induction heating of a conductive plate at a frequency of 50 Hz to 1000 Hz,
A first flat coil disposed on an upper side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate in a central portion thereof;
A second flat coil disposed at a lower side of the conductive plate and provided with a magnetic path perpendicular to the conductive plate at a central portion thereof;
A first outer runner member provided around the first flat coil and forming an outer runner through which magnetic flux generated by the first flat coil is passed;
A second outer runner member provided around the second flat coil and forming an outer runner through which magnetic flux generated by the second flat coil passes;
A magnetic metal container disposed around the first outer rotor member or the first outer rotor member, and an outer surface of the magnetic metal container disposed around the second outer rotor member or the second outer rotor member. Iron core members provided in contact with each other,
It is provided with an outer coil wound around the iron core member,
The magnetic flux generated by the outer coil by the iron core member is configured to pass through the end of the conductive plate material. 16. The method of claim 15,
A first heat insulating member provided between the first plate-shaped coil and the conductive plate, and insulating heat from the conductive plate;
A second heat insulating member provided between the second flat coil and the conductive plate, and insulating heat from the conductive plate;
Induction heating apparatus for the first heat insulating member and the second heat insulating member to hold the conductive plate from above and below. 18. The method of claim 16,
Induction heating apparatus that the first heat insulating member and the second heat insulating member is maintained by covering the entire circumference of the conductive plate.

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