JP3070725B2 - High frequency heating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a high-frequency heating device.

[0002]

2. Description of the Related Art A conventional high-frequency heating apparatus of this type will be described with reference to FIG. This high frequency heating device
, A high-frequency heating coil 200 for heating the workpiece W, a current transformer 400 for supplying a high-frequency current to the high-frequency heating coil 200, and a transformer moving mechanism 5 for moving the current transformer 400
00, and the transformer moving mechanism 500 includes:
The high-frequency heating coil 200 is moved between a heating position (a position where the heating conductor 210 faces a place where the work W is to be heated) and a retracted position (a position where the work W can be attached to and detached from the support portion 100). I have. In the high-frequency heating coil 200, the power supply conductor 220 is connected to the current transformer 400.
Is directly fixed to the contact portion 410 of the contact.

[0003]

However, the above-mentioned conventional high-frequency heating apparatus has the following problems. First, since the transformer moving mechanism is for moving a large heavy object such as a current transformer, it tends to be large and complicated, and there is a problem in terms of workability and maintenance. In addition, since the high-frequency heating coil is separated from the transformer moving mechanism, there is a problem that it is difficult to obtain the accuracy of the heating position.

The present invention has been made in view of the above circumstances, and provides a high-frequency heating apparatus which can be reduced in size as a whole, is excellent in workability and maintenance, and can position a heating position with high accuracy. It is intended to be.

[0005]

According to a first aspect of the present invention, there is provided a high frequency heating apparatus comprising: a support for supporting a work; a high frequency heating coil for heating the work; a coil moving mechanism for moving the high frequency heating coil; A current transformer having a contact portion that contacts a power supply conductor of a high-frequency heating coil located at a position between the heating position for heating the work and the retreat position for attaching and detaching the work to and from the support portion. In this case, the high-frequency heating coil is moved, and the power supply conductor is brought into direct contact with the contact portion.

A high-frequency heating device according to claim 2 is
A support portion for supporting a workpiece to be heated at a plurality of locations, a high-frequency heating coil for heating the workpiece, a coil moving mechanism for moving the high-frequency heating coil, and a power supply conductor of the high-frequency heating coil located at the heating position. A current transformer having a contact portion; and a transformer moving mechanism for moving the current transformer, wherein the coil moving mechanism detaches and attaches the work to and from a plurality of heating positions at which the high-frequency heating coil heats the work and the work. The transformer is moved between the retracted positions, and the transformer moving mechanism is configured such that the contact portions contact the power supply conductors of the high-frequency heating coils at the respective heating positions.

[0007]

FIG. 1 is a schematic side view of a high-frequency heating device according to an embodiment of the present invention in which a high-frequency heating coil is at a heating position, and FIG. 2 is a high-frequency heating according to the embodiment of the present invention. FIG. 3 is a schematic side view of a high-frequency heating coil of the apparatus in a retracted position, and FIG. 3 is a schematic plan view of a high-frequency heating coil of the high-frequency heating apparatus according to the embodiment of the present invention in a heating position.

FIG. 4 is a schematic side view showing a high-frequency heating coil of a high-frequency heating device according to another embodiment of the present invention in a first heating position, and FIG. 5 is another embodiment of the present invention. It is a schematic side view in the state where the high frequency heating coil of the high frequency heating device concerning an embodiment is in the 2nd heating position. It is to be noted that parts and the like that are substantially the same as those of the related art are denoted by the same reference numerals and described.

As shown in FIG. 1, a high-frequency heating device according to an embodiment of the present invention
0, a high-frequency heating coil 200 for heating the work W,
The coil moving mechanism 300 includes a coil moving mechanism 300 for moving the high-frequency heating coil 200 and a current transformer 400 having a contact portion 410 that contacts a power supply conductor 220 of the high-frequency heating coil 200 located at the heating position P1. Moves the high-frequency heating coil 200 between a heating position P1 for heating the work W and a retreat position P2 for attaching and detaching the work W to and from the support portion 100. The power supply conductor 220 directly contacts the contact portion 410. It is made to be made.

The support section 100 holds a grip 110 holding one end of the work W, a work center 120 that faces the grip 110 and supports the other end of the work W, and drives the grip 110 to rotate. And a drive unit (not shown). The work W supported by the support 110 is
The driving unit is driven to rotate around the central axis.

The high-frequency heating coil 200 has a substantially ring-shaped heating conductor 210 and a pair of power supply conductors 220 provided to be connected to the heating conductor 210. The work W enters the inside of the substantially ring-shaped heating conductor 210, and the peripheral surface of the work W and the inner surface of the heating conductor 210 face each other with a predetermined interval.

The coil moving mechanism 300 moves the high-frequency heating coil 200 along the work W, and is provided on the work center 120 side. The coil moving mechanism 300 includes a cylinder 310 driven by hydraulic pressure or air pressure, and a shaft 3 of the cylinder 310.
20 and a connecting member 330 provided at the tip of the cartridge 20.

The cylinder 310 is set so that the heating position P1 is slightly closer to the position where the shaft 320 is most extended, and the retreat position P2 is slightly beyond the position where the shaft 320 is most contracted.

The heating position P1 is located at a predetermined position of the work W to be heated by the heating conductor 2 of the high-frequency heating coil 200.
10 are opposite to each other, and the retreat position P2 is
The inner surface side of the heating conductor 210 of the high-frequency heating coil 200 is a position facing the work center 120. Therefore, at the retreat position P <b> 2, the work W is detachable from the support unit 100.

The connection member 330 is connected to the power supply conductor 22.
0, and a pin 332 for connecting the tip of the shaft 320 and the concave member 331. The concave member 331 has a substantially concave shape in plan view and a substantially concave shape in side view. A power supply conductor 220 of the high-frequency heating coil 200 is attached to a portion protruding when viewed from the plane, and a tip of the shaft 320 enters a portion depressed when viewed from the side and is connected by a pin 332.

It is to be noted that, among the members constituting the connecting member 330, at least the concave member 331 is made of a material having an insulating property and having excellent heat resistance.

Although not shown, the coil moving mechanism 300 has a structure such that the high-frequency heating coil 200 moves straight between the retreat position P2 and the heating position P1.
It is assumed that a guide is provided.

The current transformer 400 has a pair of contact portions 410 facing the power supply conductor 220 projecting from a side surface. The contact portion 410 has a substantially L-shape in plan view and a substantially inverted L-shape in side view. This is to ensure that the power supply conductor 220 contacts the contact portion 410.

The current transformer 400 is mounted on a rigid frame (not shown),
The mounting position is determined so that the position where the power supply conductor 220 contacts the heating position P1 becomes the heating position P1.

Next, the induction hardening of the work W by the above-described induction heating device will be described. First, when the high-frequency heating coil 200 is at the retracted position P2, the work W is supported by the support unit 100. The high-frequency heating coil 200 is moved from the retracted position P2 to the heating position P by the coil moving mechanism 300.
Move to 1.

When the high-frequency heating coil 200 reaches the heating position P1, the pair of power supply conductors 220 come into direct contact with the contact portion 410 of the current transformer 400, as shown in FIGS. Then, a high-frequency current is supplied to the high-frequency heating coil 200, and a portion of the work W facing the heating conductor 210 is induction-heated. After the predetermined heating is completed, a cooling liquid is injected from a cooling jacket (not shown) to perform induction hardening.

When the induction hardening is completed, the induction heating coil 200 is moved to the heating position P by the coil moving mechanism 300.
1 to the retreat position P2 to perform the work of replacing the work W.

Next, a high-frequency heating apparatus according to another embodiment of the present invention will be described with reference to FIGS. The difference between this high-frequency heating device and the above-described one is that, in the above-described high-frequency heating device, the work W to be heated is one place, but this is a plurality of places (two places in this embodiment). Is that

Due to such a difference, in this high-frequency heating device, a transformer moving mechanism 500 for moving the current transformer 400 is added. This transformer moving mechanism 5
No. 00 has a guide 510 for moving the current transformer 400 along the work W, and a cylinder 520 for pushing the current transformer 400 back to the initial position.

The initial position of the transformer moving mechanism 500 means that when the high-frequency heating coil 200 is at the first heating position P11, the power supply conductor 220 of the high-frequency heating coil 200
Refers to a position where it contacts the contact portion 410 of the current transformer 400. That is, the position shown in FIG.

The transformer moving mechanism 500 moves the coil moving mechanism 30 from the initial position to the second heating position P12.
0, but is automatically returned to the initial position by the force of the cylinder 520 from the second heating position P12 to the initial position.

The induction hardening of the workpiece W by the high frequency heating device will be described. First, the high-frequency heating coil 2
When the workpiece W is at the retreat position P2, the work W
To support. Next, the high-frequency heating coil 200 is moved from the retreat position P2 to the first heating position P11 by the coil moving mechanism 300.

When the high-frequency heating coil 200 reaches the first heating position P11, the power supply conductor 220 of the high-frequency heating coil 200 comes into contact with the contact portion 410 of the current transformer 400 at the initial position, and induction heating of the work W is performed. Will be

When the heating at the first heating position P11 is completed, the coil moving mechanism 300 moves the high-frequency heating coil 200 further to the second heating position P12. During this time, the already heated portion is sprayed with a cooling liquid from a cooling jacket (not shown) and subjected to induction hardening.
At this time, it is desirable to stop the oscillation of the current transformer 400.

When the high-frequency heating coil 200 reaches the second heating position P12, the oscillation of the current transformer 400 is restarted, and the workpiece W is subjected to induction heating at the second heating position P12. When the induction heating at the second heating position P12 is completed, the coil moving mechanism 300 moves the high-frequency heating coil 200 to the retreat position P2. Along with this, the current transformer 400 automatically returns to the initial position. During this time, the already heated portion is sprayed with a cooling liquid from a cooling jacket (not shown) and subjected to induction hardening.

In the above-described other embodiments, two positions of the work W are heated. However, it goes without saying that three or more positions may be heated.

Although the transformer moving mechanism 500 has been described to return the current transformer 400 to the initial position, the current transformer 400 may be returned to the initial position by the force of the coil moving mechanism 300. In this case, between the high-frequency heating coil 200 and the current transformer 400, the first
A known coupling mechanism that mechanically couples the high-frequency heating coil 200 that has reached the heating position P11 to the current transformer 400 and releases the coupling when the high-frequency heating coil 200 returns to the first heating position again. Must be provided.

A high-frequency heating device according to a first aspect of the present invention includes a support for supporting a work, a high-frequency heating coil for heating the work, a coil moving mechanism for moving the high-frequency heating coil, and a high-frequency heating coil located at a heating position. A current transformer having a contact portion that contacts the power supply conductor, and the coil moving mechanism moves the high-frequency heating coil between a heating position for heating the work and a retreat position for attaching and detaching the work to and from the support portion. And the power supply conductor is brought into direct contact with the contact portion.

According to this high-frequency heating device, the current transformer is fixed, only the high-frequency heating coil is moved, and the power supply conductor of the high-frequency heating coil reaching the heating position comes into contact with the contact portion of the current transformer so that the high-frequency heating coil is contacted. Since the high-frequency current is supplied to the current transformer, there is no need to move a large and heavy current transformer as in the related art.
Therefore, there is an effect that the entire configuration can be simplified. In addition, since the high-frequency heating coil is directly moved, the positioning thereof can be performed accurately, so that there is an effect that the accuracy of the heating position is increased. Furthermore, since the coil moving mechanism moves the high-frequency heating coil, which is much lighter than the current transformer, workability and maintenance are facilitated.

The high-frequency heating device according to claim 2 is
A support portion for supporting a workpiece to be heated at a plurality of locations, a high-frequency heating coil for heating the workpiece, a coil moving mechanism for moving the high-frequency heating coil, and a power supply conductor of the high-frequency heating coil located at the heating position. A current transformer having a contact portion; and a transformer moving mechanism for moving the current transformer. The coil moving mechanism includes a plurality of heating positions at which the high-frequency heating coil heats the work, and a retreat for attaching and detaching the work to and from the support. The transformer moving mechanism is configured to move the contact portion to contact the power supply conductor of the high-frequency heating coil at each heating position.

For this reason, high frequency heating can be applied to a plurality of locations on the work. Here, the current transformer is also moved by the transformer moving mechanism, but since the current transformer and the high-frequency heating coil are not integrated but separate as in the conventional case, the accuracy of the heating position is reduced as in the conventional case. The problem has been resolved. That is, in the case of the conventional one, the high-frequency heating coil is moved with the movement of the current transformer, but in this case, the high-frequency heating coil is moved by the coil moving mechanism, and the current transformer is moved separately by the transformer moving mechanism. Therefore, the problem of the accuracy of the heating position is solved.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a high-frequency heating device according to an embodiment of the present invention in a state where a high-frequency heating coil is at a heating position.

FIG. 2 is a schematic side view of the high-frequency heating device according to the embodiment of the present invention in a state where a high-frequency heating coil is at a retracted position.

FIG. 3 is a schematic plan view of the high-frequency heating device according to the embodiment of the present invention in a state where a high-frequency heating coil is at a heating position.

FIG. 4 is a schematic side view showing a high-frequency heating coil of a high-frequency heating device according to another embodiment of the present invention at a first heating position.

FIG. 5 is a schematic side view showing a high-frequency heating coil of a high-frequency heating device according to another embodiment of the present invention at a second heating position.

FIG. 6 is a schematic side view of a conventional high-frequency heating device of this type.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 100 Support part 200 High frequency heating coil 210 Heating conductor 220 Power supply conductor 300 Coil moving mechanism 400 Current transformer 410 Contact part P1 Heating position P2 Evacuation position

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C21D 1/10 C21D 1/42 H05B 6/10

Claims (2)

(57) [Claims] 1. A support portion for supporting a work, a high-frequency heating coil for heating the work, a coil moving mechanism for moving the high-frequency heating coil, and a contact portion for contacting a power supply conductor of the high-frequency heating coil located at a heating position. Wherein the coil moving mechanism comprises:
A high-frequency heating coil for moving the high-frequency heating coil between a heating position for heating the work and a retracted position for attaching and detaching the work to and from the support portion, wherein the power supply conductor is brought into direct contact with a contact portion; . 2. A support section for supporting a work to be heated at a plurality of locations, a high-frequency heating coil for heating the work, a coil moving mechanism for moving the high-frequency heating coil, and a high-frequency heating coil located at the heating position. A current transformer having a contact portion that contacts the power supply conductor, and a transformer moving mechanism that moves the current transformer, the coil moving mechanism is configured to move a plurality of heating positions where the high-frequency heating coil heats the work and the work. Moving between a retracted position to be attached to and detached from the support portion, and the transformer moving mechanism includes:
A high-frequency heating device wherein a contact portion moves to contact a power supply conductor of a high-frequency heating coil at each heating position.