JPS59205183A - Electromagnetic induction heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic induction heating device for heating a thin plate by electromagnetic induction.

Generally, this type of electromagnetic induction heating device uses a thin plate (strip) that is longer than its width. )j 474 There are some that use induction to heat. Such an electromagnetic induction heating device uses an electromagnet disposed to face the thin plate in the width direction of the thin plate (#ii, this electromagnet is energized by an alternating current. It is desirable to be able to heat the auxiliary board uniformly in the width direction, and it is also desirable to be able to heat it uniformly even when the width of the auxiliary board changes.In order to meet the above-mentioned requirements, conventionally, in order to meet the above requirements, If the width changes, a heating device that replaces the electromagnet to match the width of the thin plate, or a heating device that uses complicated coil windings on the electromagnet to finely adjust the current flowing through the two windings has been proposed. ing.

However, all of these devices have the disadvantage that they have a complicated structure and cannot quickly respond to changes in the thin plate. , f+ also has the disadvantage that the electromagnet cannot be adjusted easily and quickly when the electromagnet is replaced or when temperature distribution becomes uneven due to changes in external conditions during operation.

Purpose of non-invention fd Quickly and easily change the width of thin plate 7
The purpose of the present invention is to provide an electromagnetic induction heating device that can meet the

Another object of the present invention is to provide an electromagnetic induction heating device that can arbitrarily and quickly adjust the temperature distribution in the width direction of a thin plate.

According to the present invention, a plurality of magnetic pole segments are arranged in parallel with each other and facing the thin plate in the width direction of the thin plate, and each magnetic pole segment is arranged in the 19th direction of the thin plate, and the other magnetic pole segments are arranged in parallel with each other and facing the thin plate. An electromagnetic induction heating device is obtained having a drive mechanism for independently moving the magnetic pole segments and a coil common to the plurality of magnetic pole segments arranged to surround the plurality of magnetic pole segments. This device is further connected to M via a yoke.
The iJ magnetic pole segments are magnetically coupled and are provided with side magnetic pole elements that can be moved in and out in the width direction of the plate.

An embodiment of the present invention will be described below with reference to five drawings.

1 and 2 are a sectional view and a side view, respectively, of an electromagnetic induction heating device according to an embodiment of the present invention, in which a thin plate 1 whose length is longer than its width is a thin plate to be heated. It is continuously fed in the direction of the arrow, that is, in the length direction. The electromagnet 2 constituting the electromagnetic induction heating device is as shown in FIG.

They are arranged in a direction transverse to the length direction, that is, in the width direction. As shown in FIG. 2, the electromagnets 2 are arranged above and below the footboard 1 so as to face each other. Each electromagnet 2 has a width that is wider than the widest root that can be heated with this heating device, regardless of the width of the sheet that is currently being heated. Note that the number of electromagnets to be installed is determined depending on the purpose of the equipment.

There is no need to say that it is not limited to one group.

This type of electromagnetic induction heating device is required to uniformly heat the thin plate 1 in its width direction.

In order to achieve this requirement, it is necessary that the magnetic field generated by each electromagnet 2 has a predetermined distribution in the width direction of the thin plate (Japanese Unexamined Patent Publication No. 138937/1983).

This magnetic field distribution in the width direction is not uniform, and if the width of the thin plate 1 changes.

The magnetic field distribution must also be changed.

Referring to FIG. 6, one of the electromagnets constituting the electromagnetic induction heating device according to an embodiment of the present invention.

A portion along line Ill--Ill in FIG. 2 is shown partially broken. Referring also to FIG. 4, a cross-sectional view taken along line IV--IV in FIG. 6 is shown. Although only a part of one electromagnet 2 is shown in FIGS. 3 and 4,
Other electromagnets have similar structures.

As is clear from FIG. 6, the end of the electromagnet 2 is on the left side, that is, on the outside, of the end of the thin plate 1 in the width direction. Note that the other end of the electromagnet 2 also has a similar configuration. The illustrated electromagnet 2 has a plurality of main magnetic pole elements (hereinafter referred to as segments) 5 arranged in parallel and arranged in the width direction of the thin plate 1, and each segment 5 is arranged in the width direction of the thin plate 1. is facing. These segments 5 are supported within a support frame 6, and a coil 4 is commonly applied to the segments 5. Specifically, each segment 5 has four legs and a bridge, as shown in FIG.
A coil 4a is common to each segment 5 on both 1° legs having an i-shape.

4b, 4c, and 4d are wound, and currents of opposite polarity are passed through each adjacent coil.

The bridge portion of each segment 5 is connected to a drive rod 1o, which extends outside the support frame 6. A rack is provided on the side of the drive rod 10, and this rank meshes with the gears forming the drive mechanism 8. Furthermore, the legs of each section/].5 are supported and guided by a guide mechanism 9 provided inside the support frame 6.

In this configuration, by rotating the drive mechanism 8, the segments 5 can be brought closer to the thin plate 1, and at the same time, the segments 5 can be moved away from the thin plate 1. As shown in FIG. 6, the coils 4a, 4b, 4c, and 4d are supported and fixed at their ends by yokes 6, and each segment is the coil 4a, 4b, 4c,
4d allows them to be taken in and out individually within the quadruple space.

Also.

As a guide mechanism 9 during movement of the segment 5.

Using the slider (Ill) can reduce the generation of vibrations, noise, etc.

Historically, the electromagnet according to this embodiment is provided with a plate-shaped other magnetic pole element 7 in contact with the yoke 6, as shown in FIG.
This forms a magnetic circuit with the segment 5. As is clear from Fig. 6, this 111] porcelain element 7
extends in the width direction of the thin plate 10. In this example, two sets of other magnetic pole elements 7 are provided and are movable in the width direction of the thin plate 1 by a drive mechanism 11. It is desirable that the width of the yoke and each other magnetic pole element 7 in the direction of movement of the thin plate 1 is approximately the same as the width of the leg of the segnon 1-5.

This (III magnetic pole element 7 is a magnetic JR at the end of the thin plate 1
as well as sharply reduce it if necessary.

This is to generate a magnetic field in the opposite direction to the center of the A'74 anti-1. By using the other magnetic pole elements 7, the theoretically required magnetic field distribution can be achieved accurately.

As described above, according to the present invention, each segment is individually moved in the direction of the thin plate.

An electromagnetic induction heating device that can arbitrarily adjust the magnetic field distribution in the width direction of the thin plate is obtained. If it is a thin plate whose width is within the maximum processing width of the equipment.

Even if the width of the thin plate changes I, the desired magnetic field distribution can be obtained without changing the device itself.6 In this case, there is no need for special and complicated auxiliary windings. For example, if it is necessary to uniformly heat a thin plate in one width direction, each segment may be moved in accordance with the magnetic field distribution required for uniform heating.

Furthermore, even if unevenness occurs in the temperature distribution due to changes in external conditions during operation, it can be quickly corrected by readjusting the related segments at the moment of occurrence. 2 The present invention can easily realize non-uniform temperature distribution.

Each segment! - The movement may be adjusted by remote control. The shape of the segment is tr+i 4 as shown in the figure.
Needless to say, this is not limited to Ill1.

Father, in the above example, over the entire range of the board width.

The structure is divided into 419 i, i,, and t segments.

When the range of change in plate width is known in advance according to the applicable cutting equipment, a part of the electromagnet can be made into a fixed structure without division according to the minimum plate width, and the range in which the plate width can change can be changed into a variable structure. can do.

Further, the adjustment mechanism by segmentation may be applied to several parts of one side of the electromagnet, and the other part may be an integrally fixed structure having a predetermined shape.

In this case 7, one end of the thin plate to be heated is correctly positioned and fed to the fixed structure side of this electromagnet. The other end is located at the variable structure portion, and by the mechanism described above, even if the plate width changes, heating with the necessary temperature distribution can be realized.

Remaining days below

[Brief explanation of the drawing]

Fig. 1 is a plan view schematically showing an electromagnetic induction heating device to which the present invention is applied, Fig. 2 (d) is a side view of the electromagnetic induction heating device shown in Fig. 1, and Fig. 6 is a side view of the electromagnetic induction heating device shown in Fig. 2. A partially broken view showing a part along line n+-m. And FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 6. Explanation of symbols 1: Thin plate 2° electromagnet Filter : Support frame 4.4a. 4b = Coil 5: Main magnetic pole element (segment) 6: Yoke 7: Other magnetic pole element 8; Drive machine TW; 9: Guide mechanism 1
0:, Drive rod 11° 11I11 magnetic pole, j% drive mechanism,...,'□'...

Claims (1)

[Claims] 1. In an electromagnetic induction heating device that heats a thin plate fed in a predetermined direction by electromagnetic induction. a plurality of magnetic pole segments arranged in the width direction of the auxiliary plate in parallel with each other and facing the thin plate; and each magnetic pole segment is arranged in the thickness direction of the thin plate independently of other magnetic pole segments. a drive mechanism for moving the magnetic pole segments, a coil common to the plurality of magnetic pole segments disposed so as to surround the plurality of magnetic pole segments, and a yoke slidingly in contact with the magnetic pole segments at both ends. 1. An electromagnetic induction heating device characterized in that: (a) a side magnetic pole element is provided so as to be freely protrusive and retractable in the width direction of a thin plate;