JP2652755B2 - High frequency heating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating apparatus provided with a transformer and a high-frequency heating coil to which a high-frequency current is supplied from the transformer (hereinafter, the high-frequency heating coil is also simply referred to as a heating coil). The coil is separated into a fixed primary coil and a movable secondary coil,
The present invention relates to a high-frequency heating device in which a work coil for heating a work is connected in series to a secondary coil.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to the drawings. 12A and 12B are drawings for explaining an example of a conventional high-frequency heating device. FIG. 12A is a partially sectional front view, and FIG. 12B is a plan view. The workpiece, a short cylindrical shape is placed on the workpiece mounting table 90 picked the workpiece W having a cylindrical recess W2 shallow upper end face, the inner peripheral surface W3 (hereinafter the inner periphery of the recess W2 the surface W3 explaining a case of heating the also referred) and the heated surface W3.

This high-frequency heating device includes a transformer 66 that receives a high-frequency current from a high-frequency power supply 80 via a pair of flexible lead conductors 81, and an output side of the transformer 66.
Annular heating coil 6 connected via lead conductor 65
1 is provided. First, an appropriate transformer moving means 67
The transformer 66 is raised in the direction of arrow A by a (for example, a cylinder and a rod that moves forward and backward by the operation of the cylinder) and is moved to a standby position indicated by a dotted line. Next, after the work W is placed on the work receiver 90, the heating coil 61 is lowered in the direction of arrow B by the transformer moving means 67 so as to face and approach the heated surface W3.

While rotating the work W about the axis W1 thereof with the work receiver 91 by a rotating device (not shown), a high-frequency current is supplied to the heating coil 61 from the high-frequency power source (not shown) via the transformer 66 for a predetermined time. After the surface to be heated W3 is heated, the transformer 66 is moved up again by the transformer moving means 67 together with the heating coil 61 to the standby position indicated by the dotted line. After being started rise of the heating coil 61, when injected into the heated plane W3 which is heated to shrink the liquid inlet from the jacket for tempering liquid inlet jet (not shown), the pressure
The hot surface W3 is cooled to form a hardened layer W4. Thereafter, the rotation of the work W is stopped, and the work W is
After taking it out from 0, the next work W is
After the transformer 66 is lowered together with the work coil 61, heating is performed in the same manner as in the first work W.

[0005]

Before and after heating the workpiece W, the heating coil 61 is moved to the surface to be heated W3.
Lowering the transformer 66 so as to face and approach the object and away from the heated surface W3;
It is necessary to raise. However, the transformer 66
There are the following problems when raising and lowering the robot.

That is, (1) Since the transformer 66 is large in weight (for example, 80 kg), a strong transformer moving means 67 for raising the transformer 66 is required, and the cost of the high-frequency heating device is increased. (2) Transformer 66
The flexible lead conductor 81 used to supply power to the
Since several thin copper plates are stacked in order to provide good flexibility and heat dissipation, the electric resistance is large and the power loss is large. (3) Two flexible lead conductors 81 are required, but as the transformer 66 moves up and down,
There is a possibility of a short circuit between these flexible lead conductors 81.

[0007] The present invention was been developed in view of the above problem, without requiring a moving means of a strong trans, also need to power transformer by a flexible lead conductors rather name and size of the apparatus It is an object of the present invention to provide a high-frequency heating device with improved safety .

[0008]

According to a first aspect of the present invention, there is provided a high-frequency heating apparatus including a transformer and a high-frequency heating coil to which a high-frequency current is supplied from the transformer. The high-frequency heating coil includes an annular single -winding primary coil connected to a secondary winding of the transformer, and a coil formed in a plane formed by the primary coil .
Annularly arranged concentrically close to and facing the primary coil
And singlet winding secondary coil, and a work coil for heating the being and integrally formed with the secondary coil in series via the pair of conductors that are connected to the cutting point of the secondary coil work, the primary
Mounted on the entire surface of the coil except for the surface facing the secondary coil
And a secondary coil moving means for moving the secondary coil in the axial direction of the primary coil .
And the secondary coil moving means is used for heating the workpiece during heating.
Bring the secondary coil closer to the primary coil, and
The coil is separated from the primary coil.

[0009] high-frequency heating apparatus according to claim 2 wherein a transformer, the high-frequency heating apparatus having a high-frequency heating coil through which a high-frequency current is supplied from the transformer, the high frequency heating coil is a secondary winding of the transformer It is connected to, and, 1, each of the plurality of annular connected in series
A heavy wound primary coil and one in the plane formed by each primary coil
An annular single layer arranged concentrically close to the next coil
And winding secondary coil, and a work coil for heating said each of the secondary coil and the workpiece are integrally formed via a connected pair of conductors to the cutting point on each secondary coil in series with the primary
Installed on the entire surface except the side facing the secondary coil of the coil
A core of magnetic material is, and a plurality of secondary coil moving means for moving each of said secondary coil in the axial line direction of the primary coil comprises a, and the secondary coil moving means Wa
The secondary coil moves closer to the primary coil when heating
After heating, separate the secondary coil from the primary coil.
Have things.

[0010] high-frequency heating apparatus according to claim 3, wherein a transformer, the high-frequency heating apparatus having a high-frequency heating coil through which a high-frequency current is supplied from the transformer, the high frequency heating coil is a secondary winding of the transformer An annular single-wound primary coil connected to the
Via a pair of conductors connected to a cutting point of the secondary coil, the ring being a single-wound secondary coil arranged concentrically in parallel with and close to the plane of the secondary coil. a work coil for and heat the workpiece is formed integrally with the secondary coil in series, before
The entire surface of the primary coil excluding the surface facing the secondary coil
The core of the magnetic material attached to the
And the secondary coil moving means for moving in a direction parallel to the plane formed by the following coil comprises a, and the secondary carp
The moving means changes the secondary coil to the primary coil when heating the work.
Close and after heating separate the secondary coil from the primary coil
I am trying to.

[0011] high-frequency heating apparatus according to claim 4, wherein a transformer, the high-frequency heating apparatus having a high-frequency heating coil through which a high-frequency current is supplied from the transformer, the high frequency heating coil is a secondary winding of the transformer An annular single-wound primary coil connected to the
An annular single-wound secondary coil arranged substantially concentrically in parallel with and close to a plane to be closed; and a secondary coil via a pair of conductors connected to a cutting point of the secondary coil. A work coil formed in series and integrally to heat the work;
All of the primary coil except for the surface facing the secondary coil
A core of the attached magnetic material surface, the secondary coil rotating rotating the secondary coil around the axial line of the secondary coil
Means , and said secondary coil rotating means
Moves the secondary coil closer to the work when the work is heated.
After heating, separate the work coil from the work
I have.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described with reference to the drawings. 1 to 3 are drawings for explaining a high-frequency heating device 101 of the present embodiment,
FIG. 1A shows a state in which the work coil is heating the work.
To schematic perspective illustration, FIG. 1 (b) a work coil stand
Schematic perspective view showing a state in which the position, Figure 2 is an electrical circuit diagram, FIG. 3 (a) is a part sectional front view during heating the workpiece, FIG. 3 (b) the plan view, FIG. 3 (C) is FIG.
FIG. 3B is an explanatory sectional view taken along line KK of FIG. Incidentally, a case of heating the inner circumferential surface of the recess W2 formed on the end face of the short cylindrical workpiece W as described in the prior art W3 (heated surface W3) as an example.

The high-frequency heating device 101 includes a transformer 16
And a heating coil 10. The transformer 16 is connected to a primary power supply (not shown) as shown in FIG.
2 connected to the winding 16c and the output terminals 16a and 16b.
It is provided and the next winding 16d.

As shown in FIG. 1 to FIG.
Is a pair of lead conductors 15 having one ends connected to the output terminals 16a and 16b, respectively.
An annular singlet winding primary coil 11 connected to the other end of the 1
Inside the secondary coil 11, approaching and facing the primary coil 11,
An axial core line 11 a of the primary coil 11 which is disposed concentrically with the primary coil 11 and in a plane formed by the primary coil 11.
Plane perpendicular to an annular singlet winding secondary coil 12 movable in the direction of parallel and the secondary coil 12 of the connected pair to the cutting point 12a of each end comrades secondary coil 12 is formed Connecting conductor 14 disposed in the
And an annular work coil 13 connected to the other end to heat the heated surface W3.

The diameter of the work coil 13 is selected so that the work coil 13 can approach and face the surface to be heated W3. Further, the lead conductor 15, the primary coil 11, the secondary coil 12, the work coil 13, and the connection conductor 14
Are all formed of a square tube made of a good conductive metal, and the hollow portion of the square tube serves as a flow path for the coolant of each coil and conductor. Secondary coil 12, work coil 1
3, and the supply of the coolant to the connection conductor 14 is, for example, 2
This is performed via a flexible coolant supply pipe (not shown) connected to a coupler (not shown) provided in the next coil 12.

The high-frequency heating device 101 also causes the secondary coil 12, the work coil 13, and the connection conductor 14 that are integrally connected to each other while keeping the secondary coil 12 concentric with the primary coil 11. Shaft core 11a of primary coil 11
Along the direction of arrow A, the secondary coil 12 is separated from the primary coil 11, and the secondary coil 12 is lowered in the direction of arrow B opposite to the arrow A. There is provided a secondary coil moving means 17 for approaching the primary coil 11. The secondary coil moving means 17 includes, for example, a cylinder and a rod that moves forward and backward by the cylinder.

The heating coil 10 magnetically couples the primary coil 11 and the secondary coil 12 by crossing the magnetic flux generated by the primary coil 11 to the secondary coil 12. In some cases, only the air gap is provided between the secondary coil 11 and the secondary coil 12.
As shown in (b) and (c), the primary coil 11 and the secondary coil 12 are provided with a short cylindrical insulating tube 18 having a rectangular cross section. Further, in this embodiment, attached to the primary Koiru 11, on the entire surface except a surface opposed to the secondary coil 12 of the primary coil 11, a core 19 of magnetic material such as steel, silicon steel or ferrite Thus, the magnetic field generated by the primary coil 11 is converged toward the secondary coil 12.

Next, the pressurizing by using a high-frequency heating apparatus 101
The operation of quenching the hot surface W3 will be described. As shown in FIG. 1B, the secondary coil 1 is moved by the secondary coil moving means 17.
2. The combined body of the work coil 13 and the connection conductor 14 is raised in the direction of arrow A and moved to the standby position indicated by the dotted line in FIG. 3A, and then the work W is placed on the work receiver 90. Then, the work coil 13 is lowered in the direction of arrow B by the secondary coil moving means 17 to approach and face the heated surface W3.

[0019] After this, while rotating together with the work receiving 90 around its axial line W1 of the workpiece W by an unillustrated rotating device, from the high-frequency power source (not shown), the primary winding 16c of the transformer 16, the secondary winding 16d, A high-frequency current is applied to the primary coil 11 for a predetermined time via the lead conductor 15.
Turn on electricity. For electromagnetic induction action by energizing the primary coil 11
Therefore, the predetermined time high-frequency current to the work coil 13 via the secondary coil 12 and the connecting conductor 14, for heating an object to be heated <br/> surface W3 flows. At this time, the primary coil
The magnetic field generated by the coil 11 converges toward the secondary coil 12
Power from the primary coil 11 to the secondary coil 12
Force transmission is high frequency, high current, even if each coil is a single winding
Is performed efficiently in combination with the action of After heating , the work coil 13 is separated from the work by the secondary coil moving means 17.
Raise to the standby position indicated by the dotted line.

After the work coil 13 starts to rise,
When a quenching liquid is sprayed from a jacket (not shown) onto the quenched surface W3 and cooled, a hardened layer W4 is formed. Next, the rotation of the work W is stopped, the work W is detached from the work receiver 90, and the next work W is placed on the work receiver 90, and the work coil 13 is moved by the secondary coil moving means 17.
Is moved downward to approach and face the heated surface W3 of the next work W. Hereinafter, the next work W is performed in the same manner as the first work W.
The cured layer W4 can be formed on the heated surface W3.

In the high-frequency heating apparatus 101, as described above, before and after heating the work W, the secondary coil 12, which is much lighter than the weight of the transformer 16, without moving the heavy transformer 16 up and down. Since the combined body of the coil 13 and the connecting conductor 14 is moved up and down by the secondary coil moving means 17, the secondary coil moving means 17 does not need to be strong, so that the cost of the high-frequency heating device 101 can be reduced.

Further, since the transformer 16 is fixed, an ordinary fixed lead conductor can be used for the power supply cable to the transformer 16 instead of the flexible lead conductor described in the prior art, so that the conventional thin conductor is used. The drawback that the electric resistance is lower than when a flexible lead conductor having a copper plate laminated thereon is used and there is a possibility of a short circuit between the flexible lead conductors has been eliminated.

Next, a second embodiment of the present invention will be described. The high-frequency heating device 102 of the present embodiment heats a workpiece by direct energization, and as shown in a schematic perspective view of FIG. 4, the transformer 16 and the transformer 16 of the high-frequency heating device of the first embodiment. Output terminals 16a, 16
b, a heating coil 10, a pair of lead conductors 15 of the heating coil 10, a primary coil 11, a secondary coil 12, a pair of connection conductors 14 each having one end connected to a cutting point 12 a of the secondary coil 12, and A transformer 26, output terminals 26a and 26b, a heating coil 20, and a pair of lead conductors 2 of the heating coil 20 respectively correspond to the secondary coil moving means 17.
5, primary coil 21, secondary coil 22, secondary coil 22
And a secondary coil moving means 27 having a pair of connection conductors 24, one ends of which are respectively connected to the cutting points 22a. The primary coil 21 and the secondary coil described below
Reference numeral 22 denotes a single winding as described above, and the primary coil has a front winding.
FIG outside of the core of Junzu that magnetic material serial is mounted.

The other end of one connecting conductor 24 has
The first electrode 26 is connected to one end of the heated surface V1 on one side of the rectangular parallelepiped work V placed on the work receiver 90, and the other end of the other connection conductor 24 is connected. , A linear work coil 23 disposed in parallel with the surface to be heated V1 and a second electrode 27 that contacts the other end of the surface to be heated V1 are sequentially connected and fixed.

Next, an operation for heating the heated surface V1 of the work V using the high-frequency heating device 102 will be described. After the secondary coil 22, the connecting conductor 24, the first electrode 26, the work coil 23, and the second electrode 27 are raised in the direction of arrow A by the secondary coil moving means 27, the work V is placed on the work receiver 90. Mounted, secondary coil moving means 2
And lowering the work coil 13 in the direction of the arrow B first respective end portions of the heated surface V1 of the workpiece V by 7,
The tips of the second electrodes 26 and 27 are brought into contact.

Next, a high frequency power generated in the secondary coil 22 by a high frequency current supplied to the primary coil 21 from a high frequency power supply (not shown) via the transformer 26, the output terminals 26a and 26b of the transformer 26, and the lead conductors 26a and 26b. The current flows from the secondary coil 22 to one of the connection conductors 2.
4. Return to the secondary coil 22 through the first electrode 26, the surface to be heated V1, the second electrode 27, the work coil 23, and the other connecting conductor 24.

The heated surface V1 is heated by both the current flowing directly on the heated surface V1 of the work V and the induction current generated on the heated surface V1 by the high-frequency current flowing through the work coil 23. After this, work coil 2
The quenching liquid is sprayed onto the heated surface V1 from a jacket (not shown) provided at 3 to complete the quenching of the heated surface V1. After this,
The work coil 23 is raised in the direction of arrow A. In the second embodiment, the same effects as in the first embodiment can be obtained.

Next, an embodiment of the present invention will be described. 5 to 8 show the high-frequency heating device 103 of the present embodiment.
A view for explaining a 5 work coil
FIG. 6 is a schematic perspective view showing a state in which the work is being heated , and FIG .
In front view, Figure 7 is a plan explanatory view in FIG. 5,
FIG. 8 is a perspective view of the work. Peripheral surface U of annular work U
As shown in FIG. 8, the hardened layer U1 has an annular shape in the circumferential direction.
To U4.

As shown in FIGS. 5 to 7, the high-frequency heating device 103 of the present embodiment includes a transformer 36 for receiving a high-frequency current from a high-frequency power supply (not shown) and a heating coil 30. The heating coil 30 includes four rings connected in series.
And Jo of singlet winding primary coil 31 a to 31 d, the inside of the primary coil 31 a to 31 d, each primary coil 31 a to 31 d
And the core wire 3 of each of the primary coils 31a to 31d
An annular single layer movably arranged in the direction of 01 to 304
Wound secondary coils 32a to 32d and secondary coils 32a to 3
Annular work coils 33a to 33d integrally and serially connected to 2d, and secondary coils 32a to 32d, respectively.
The basic configuration is to have secondary coil moving means 37a to 37d for raising and lowering d along the axial core lines 301 to 304, respectively. Also, the primary coil 32
a to 32d are provided with a core (not shown) according to the above.
You.

Hereinafter, the high-frequency heating device 103 will be described in detail. One output terminal 36a of the transformer 36 is sequentially connected to a lead conductor 3511, a heating conductor 3111, a connection conductor 3512, a heating conductor 3112, a connection conductor 3513, a heating conductor 3113, a connection conductor 3514, and one end of an annular primary coil 31d. Are connected in series, and the transformer 3
6 are sequentially connected to the lead conductors 35b.
15, the heating conductor 3114, the connection conductor 3516, the heating conductor 3115, the connection conductor 3517, the heating conductor 3116, the connection conductor 3518, and the other end of the primary coil 31d are connected in series. The conductors 3511 to 518 are linear, and the heating conductors 3111 to 31
Reference numerals 16 each have a semicircular shape.

Then, the heating conductors 311 to 1113 are
Since the heating conductors 3114 to 3116 are arranged on the same plane so as to oppose each other,
11 and 3114 form the primary coil 31a.
12 and 3115, the primary coil 31b
A primary coil 31c is formed by 13 and 3116, respectively. Each cutting point 2 of the secondary coils 32a to 32d
01-204, a pair of parallel and axial core lines 301
One ends of the connection conductors 34a to 34d arranged in the directions of .about.304 are connected. And these connection conductors 3
Circular work coils 33a to 33d are connected to the other ends of 4a to 34d, respectively.

Next, the operation in the case where the hardened layers U1 to U4 are formed on the heated surface U5 of the work U using the high frequency heating device 103 will be described. First, as shown in FIG.
The work coil 33a is raised in the direction of arrow A by the next coil moving means 37a and moved to the standby position indicated by the dotted line. Next, the lower end surface of the work U is placed on the work receiver 91, and the work U is moved to the first quenching station S1 by a work receiver moving device (not shown).
Is positioned immediately below the work coil 33a. And
The work coil 33a is moved by the secondary coil moving means 37a.
Is lowered in the direction of arrow B so as to surround the portion to be heated forming the hardened layer U1 of the work U, and a high-frequency current is transmitted from the high-frequency power supply (not shown) to the primary coils 31a to 31d via the transformer 36. When energized for a predetermined time, the secondary current generated in the secondary coil 32a is changed to the work coil 33a.
And the heated portion is heated.

Thereafter, the secondary coil 32a is moved to the standby position by the secondary coil moving means 37a. When this movement is started, a quenching liquid is injected from a jacket (not shown) to the heated portion and cooled to form a hardened layer U1. Next, the work receiver 91 is moved by the work receiver moving means in the direction of arrow C to the second quenching station S2, and the hardened layer U2 is formed using the work coil 33b in the same manner as described above.

Further, similarly, in the third and fourth quenching stations S3 and S4, the hardened layers U3 and U4
Is formed, the work U is removed from the fourth station S4. After that, the next work U is similarly cured layers U1 to U
4 is formed. The high-frequency heating device 103 of the present embodiment utilizes the advantages of the high-frequency heating device 101 in a high-frequency heating device that sequentially heats a plurality of portions of a work.

The transformer 36 and each of the primary coils 31a-3
When 1d has a sufficient capacity, the work coils 3 are respectively provided in the first to fourth stations S1 to S4.
Heating by 3a-33d can be performed simultaneously. Therefore, after the end of the heating operation in each station, the work U is moved to the next station by the work receiving / moving means, and a predetermined hardened layer is formed in each station. Can be shortened.

Next, an embodiment of the present invention will be described. Fig. 9 shows the state where the work coil is heating the work.
It is a typical perspective view shown. High-frequency heating device 1 of the present embodiment
04 is the high-frequency heating device 101 as shown in FIG.
Of the transformer 16, the output terminals 16a, 16 of the transformer 16
b, a heating coil 10, a pair of lead conductors 15 of the heating coil 10, a primary coil 11, a secondary coil 12, a pair of connection conductors 14 each having one end connected to a cutting point 12 a of the secondary coil 12, a work A transformer 46, output terminals 46a and 46b, a heating coil 40, a pair of lead conductors 45 of the heating coil 40, a primary coil 41, and a secondary coil 4 corresponding to the coil 13 and the secondary coil moving means 17, respectively.
It has a pair of connection conductors 44, one end of which is connected to a cutting point 42 a of the secondary coil 42, a work coil 43, and a secondary coil moving means 47.

However, in the high-frequency heating device 104,
The primary coil 41 and the secondary coil 42 have the same diameter, and approach concentrically so that the plane formed by the primary coil 11 and the plane formed by the secondary coil 12 are parallel. It is arranged. The connection conductor 44 is disposed in a plane formed by the secondary coil 42. Further, the work coil 43 has a radially open portion of the secondary coil 42 starting from the axis 42 b of the secondary coil 42.
A saddle-shaped coil that accommodates the peripheral surface of a cylindrical work P in an open portion and heats the peripheral surface.

Further, the secondary coil moving means 47 moves the secondary coil 42 in the plane of the secondary coil 42 in the direction of the arrow E perpendicular to the axis 42a of the secondary coil 42. It is separated from the primary coil 41 and moves in the direction of arrow F opposite to arrow E to approach the primary coil 41. Also in the high-frequency heating device 104 of the present embodiment,
Before and after heating the work P, the secondary coil 42 is moved instead of moving the transformer 46, so that the same effect as the high-frequency heating device 101 of the first embodiment can be obtained.

Next, a first embodiment of the present invention will be described. Fig. 10 shows the state where the work coil is heating the work.
It is a typical perspective view showing a state. As shown in FIG. 10 , the high-frequency heating device 105 of this embodiment includes a transformer 46 of the high-frequency heating device 104 and an output terminal 46 of the transformer 46.
a, 46b, a heating coil 40, a pair of lead conductors 45 of the heating coil 40, a primary coil 41, a secondary coil 42,
A pair of connection conductors 44, one ends of which are connected to the cutting points 42a of the next coil 42, respectively, and a transformer 56 and output terminals 56a, 56 corresponding to the work coil 43, respectively.
b, a heating coil 50, a pair of lead conductors 55 of the heating coil 50, a primary coil 51, a secondary coil 52, a pair of connection conductors 54 each having one end connected to a cutting point 52a of the secondary coil 52, and A work coil 53 is provided.

However, in the high-frequency heating device 105,
The connection conductor 54 is bent at 90 degrees and formed in a rectangular shape, and the open portion of the saddle-shaped work coil 53 is
It is provided in the circumferential direction of the secondary coil 52. A secondary coil rotating means 57 is provided as equivalent to the secondary coil moving means 47 of the high-frequency heating device 104. The secondary coil rotating means 57 is provided with the secondary coil 5.
2 is rotated (rotated) about its axis 52b to rotate the work coil 53 in the direction of the arrow H in the circumferential direction of the secondary coil 52, thereby separating the work coil 53 from the work P. The workpiece is rotated in the direction of arrow G opposite to arrow H to approach the workpiece P. Also in the high-frequency heating device 105 of this embodiment, before and after heating the work P,
Instead of moving the transformer 56, the secondary coil 52
Is rotated, so that the high-frequency heating device 101 of the first embodiment is rotated.
The same effect can be obtained.

Next, a second embodiment of the present invention will be described. Figure 11 shows the work coil heating the work.
It is a typical perspective view showing a state. As shown in FIG. 11 , the high-frequency heating device 105A of the present embodiment differs from the high-frequency heating device 105 in the following points. That is, the annular secondary coil 52A of the heating coil 50A is disposed inside the primary coil 51 and concentrically with the primary coil 51 and in the same plane. And the cutting point 52 of the secondary coil 52A
After the connection conductor 54A connected to Aa is pulled out downward, the connection conductor 54A extends in the horizontal direction and along the axis 52A of the secondary coil 52A.
It is bent in the radial direction viewed from the center b, and then bent in the circumferential direction of the secondary coil 52A and connected to the work coil 53. In the high-frequency heating device 105A of the present embodiment, the same effect as the high-frequency heating device 105 can be obtained.

The high-frequency heating device 103 is a plurality of annular primary coils connected in series, instead of the primary coil 11 of the high-frequency heating device 101. Although a secondary coil movable in the axial direction and a work coil connected to each secondary coil are provided, even in the high-frequency heating device 102, a plurality of annular primary coils 21 connected in series are provided. And a work coil and a secondary coil movable in the axial direction of the primary coil can be provided for each primary coil. Similarly, the high-frequency heating devices 104, 1
05 and 105A, a plurality of primary coils connected in series, a secondary coil and a work coil connected in series to and fixed to the secondary coil are provided for each primary coil. In the high-frequency heating device 104, the high-frequency heating device 105 is moved in a direction parallel to the primary coil.
In 105A and 105A, it can be made to rotate while being concentric with each primary coil.

[0043]

As described above, according to the first aspect of the present invention, there is provided a high-frequency heating apparatus including a transformer and a high-frequency heating coil to which a high-frequency current is supplied from the transformer. and singlet winding primary coil of the connected annular secondary winding, and a double winding secondary coil movably disposed an annular inside the primary coil in the axial line direction of the primary coil, A work coil formed in series with and integral with the secondary coil via a pair of conductors connected to a cutting point of the secondary coil; and a core provided on the primary coil
And secondary coil moving means for moving the secondary coil in the axial direction of the primary coil.

Therefore, in the high-frequency heating apparatus according to the first aspect, before and after heating the work, the secondary coil integrated with the work coil is moved without moving the transformer, so that the conventional high-frequency heating apparatus can be used. There is no need for a powerful moving means for moving the transformer like a heating device. The primary coil and the secondary coil are single-wound.
Therefore, the size of the coil can be reduced, so that the cost of the high-frequency heating device can be reduced.

Further, without moving the transformer, the secondary coil disposed so as to be movable with respect to the primary coil of the heating coil and close to the primary coil is moved or rotated. Since it does not require the flexible lead conductor provided for moving the transformer, it eliminates the drawbacks of the flexible lead conductor, which inevitably have high resistance and may cause a short circuit. can do.

According to a second aspect of the present invention, the first aspect of the present invention includes one primary coil, one secondary coil corresponding to the primary coil, and one work coil. Instead, a plurality of annular single windings 1 connected in series
And the next coil, the plurality corresponding to each of the primary coil 1
It comprises a heavy wound secondary coil, a core similar to the above, a plurality of work coils corresponding to each secondary coil, and a plurality of secondary coil moving means for moving each secondary coil. Therefore, the high-frequency heating device according to the second aspect of the invention can enjoy the advantages of the first aspect of the invention in a high-frequency heating device that sequentially heats a plurality of portions of a workpiece.

According to a third aspect of the present invention, in a high-frequency heating apparatus including a transformer and a high-frequency heating coil to which a high-frequency current is supplied from the transformer, the high-frequency heating coil is connected to a secondary winding of the transformer. an annular singlet winding primary coil, disposed in parallel to the primary coil, and one double winding secondary coil of the movable annular in a direction parallel to the primary coil, and the core equivalent to the secondary A work coil which is formed in series and integrally with the secondary coil through a pair of conductors connected to the cutting point of the coil to heat the work, and a direction in which the secondary coil is parallel to a plane on which the primary coil is formed And a secondary coil moving means for moving the secondary coil. Therefore, the high-frequency heating device according to the third aspect of the invention has the same advantages as the first aspect of the present invention because the secondary coil is moved together with the work coil without moving the transformer before and after heating. In addition, it can deal with works of various shapes .

According to a fourth aspect of the present invention, in a high-frequency heating device including a transformer and a high-frequency heating coil to which a high-frequency current is supplied from the transformer, the high-frequency heating coil is connected to a secondary winding of the transformer. An annular single-wound primary coil, an annular single-wound secondary coil disposed substantially concentrically with the primary coil and rotatably provided , as described above.
A core and a work coil are heated, and a work coil formed in series and integrally with the secondary coil through a pair of conductors connected to a cutting point of the secondary coil, and the secondary coil is connected to the secondary coil. Secondary coil rotating means for rotating around the axis. Therefore, the high-frequency heating device of the invention according to claim 4 does not move the transformer before and after heating,
Since the secondary coil is rotated together with the work coil, it has the same advantages as the first and third aspects of the invention .

[Brief description of the drawings]

[1] of the first embodiment of the invention of claim 1, wherein (a) is Wa
FIG. 3B is a schematic perspective view illustrating a state in which the work coil is heating the work, and FIG.
It is a typical perspective explanatory view shown.

FIG. 2 is an electric circuit diagram of the high-frequency heating device shown in FIG.

[Figure 3] of the high-frequency heating apparatus shown in FIG. 1 (a) shows workpiece
Partial cross-sectional front view during heating , (b) is the same plan view,
(C) is an explanatory sectional view taken along line KK of (b).

[4] pressure to the workpiece in the second embodiment of the invention of claim 1, wherein
It is a typical perspective view in heat .

FIG. 5 is a work coil according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view showing a state in which the work is being heated .

6 is an explanatory front view of the high-frequency heating device shown in FIG.

FIG. 7 is an explanatory plan view of the high-frequency heating device shown in FIG. 5;

8 is a perspective view of a workpiece heated by the high-frequency heating device shown in FIG.

FIG. 9 is a view showing a work coil according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view showing a state in which the work is being heated .

FIG. 10 is a sectional view showing a work coordinator according to a first embodiment of the present invention ;
FIG. 4 is a schematic perspective view showing a state where the il is heating the work .

FIG. 11 is a sectional view showing a work coordinator according to a second embodiment of the invention ;
FIG. 4 is a schematic perspective view showing a state where the il is heating the work .

12 (a) is a front view and FIG. 12 (b) is a plan view of a conventional high-frequency heating apparatus.

[Explanation of symbols]

10, 20, 30, 40, 50, 50A Heating coil 11, 21, 31, 41, 51 Primary coil 11a, 42b, 52b, 52Ab, 301-304
Axial cores 12, 22, 32, 42, 52, 52A Secondary coils 12a, 22a, 42a, 52a, 52Aa, 201 to 201
204 Cutting point 13, 23, 33, 43, 53 Work coil 14, 24, 44, 54, 54A, 34a to 34d Connection conductor 16, 26, 36, 46, 56 Transformer 16d Secondary winding 17, 27, 37, 47 Secondary coil moving means 18 Insulator 19 Core 57 Secondary coil rotating means

Claims (4)

(57) [Claims] A transformer [1 claim], in the high-frequency heating device and a high-frequency heating coil through which a high-frequency current is supplied from the transformer, the high frequency heating coil, singlet of the connected annular secondary winding of the transformer A wound primary coil, and a pair approaching the primary coil in a plane formed by the primary coil.
And singlet winding secondary coil countercurrent to disposed concentrically annular, and is integrally formed with the secondary coil in series via a connected pair of conductors to the cutting point of the secondary coil Add work
Heat the work coil and the entire surface of the primary coil except for the surface facing the secondary coil.
The core of the mounted magnetic body 2 to move the secondary coil in the axial direction of the primary coil
And a secondary coil moving means , and the secondary coil moving means comprises a secondary coil moving means for heating the workpiece.
The heating coil close to the primary coil, and after heating the secondary coil
Is separated from the primary coil . 2. A high-frequency heating device including a transformer and a high-frequency heating coil to which a high-frequency current is supplied from the transformer, wherein the high-frequency heating coil is connected to a secondary winding of the transformer, and each of the high-frequency heating coils is A plurality of annular single-winding primary coils connected in series, and the primary coils are closely approached in a plane formed by each of the primary coils
To a singlet winding secondary coil arranged annularly concentrically and integrally formed through the pair of conductors that are connected to the cutting point of each of the secondary coils in each of the secondary coils in series Work
The work coil and the entire surface of the primary coil except for the surface facing the secondary coil.
A core of the attached magnetic material surface, and a plurality of secondary coil moving means for moving each of said secondary coil in the axial line direction of the primary coil comprises a, and the secondary coil moving means A high-frequency heating apparatus characterized in that a secondary coil is brought closer to the primary coil when the workpiece is heated, and the secondary coil is separated from the primary coil after the heating. 3. A high-frequency heating device including a transformer and a high-frequency heating coil to which a high-frequency current is supplied from the transformer, wherein the high-frequency heating coil is an annular single coil connected to a secondary winding of the transformer. Wound primary coil, parallel to the plane formed by the primary coil and approaching and facing
An annular single-wound secondary coil arranged concentrically and a work formed in series and integrally with the secondary coil via a pair of conductors connected to a cutting point of the secondary coil Add
Except for the work coil to be heated and the primary coil except for the surface facing the secondary coil
A magnetic core mounted on a surface, and secondary coil moving means for moving the secondary coil in a direction parallel to a plane formed by the primary coil, and moving the secondary coil. The means is a secondary
The heating coil close to the primary coil.
A high-frequency heating device separated from the next coil . 4. A high-frequency heating device comprising a transformer and a high-frequency heating coil to which a high-frequency current is supplied from the transformer, wherein the high-frequency heating coil is an annular single coil connected to a secondary winding of the transformer. Wound primary coil , parallel to and close to the plane formed by the primary coil
And a work piece formed in series and integrally with the secondary coil via a pair of conductors connected to a cutting point of the secondary coil, and an annular single-wound secondary coil arranged substantially concentrically. Add
Except for the work coil to be heated and the primary coil except for the surface facing the secondary coil
A magnetic core mounted on a surface, and secondary coil rotating means for rotating the secondary coil about an axis of the secondary coil, and the secondary coil rotating means Is the secondary core when the workpiece is heated.
The work coil after heating.
A high-frequency heating device that is separated from a work .