JPS59116318A - Induction heater - Google Patents

Abstract

PURPOSE:To always maintain correctly the temp. on the side faces of a slab by providing a temp. detector which detects the heating temp. on the side faces, and a control device which controls the space between the front of the side face and the side faces between side face inductors in accordance with the temp. detected with said detector. CONSTITUTION:Spaces g1, g2 between top and bottom surfaces are set roughly at the same value, and top and bottom surface inductors 1, 2 are fixed. The side faces of a slab 3 after passage through the inductors 1, 2, 4 are measured by a temp. detector 11. The values measured with the detector are fed to a control device 12 which compares the values with reference temp. If the values are higher than the reference temp., the control device retreats the inductor 4 to widen the space g3 between the side faces. If the measured temp. is lower than the reference temp., the device advances the inductor 4 to narrow the space g3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an induction heating device, particularly an end portion of a thick metal block.
The top surface, the bottom surface and the side surfaces are spaced apart from each other.
The present invention relates to an induction heating device that heats by arranging lower and side inductors.

For example, when a slab is molded by continuous casting, it is necessary to compensate for the temperature at the end, where the temperature decreases significantly compared to other parts, when directly rolling the slab in a rolling mill, so-called direct rolling. be.

Conventionally, when performing such temperature compensation, an induction heating apparatus, the schematic structure of which is shown in FIGS. 1 and 2 of the accompanying drawings, has been used. In addition, in the figure, what is shown by a solid line is a conventional device.

That is, in the figure, reference numeral 1 indicates an upper surface inductor, and 0 indicates a lower surface inductor, which heats the high temperature slab 3, which is the material to be heated, from above and below. In this case, the surface and top of the slab 30,
The upper surface distance/l ft and the lower surface distance tJ between the lower surface inductor and the lower surface inductor are approximately the same value.
, the first one is positioned and set.

However, the thickness of slab 3 is /SO~, 2som
In addition to the upper and lower inductors, a side inductor is provided in the upper part of the inductor, so that heating can be performed from the side as well.

In the conventional induction heating device configured as described above, the side distance fl between the side inductor and the side surface of the slab 3 is
If J is set to the same value as the vertical distance ft+9s between the other upper and lower inductors /, - and the slab surface, that is, 21 : Ne 0 3 , the end of the slab 7 The side temperature tends to be higher than that of the top and bottom surfaces.
To avoid warping, the vertical and side spacing is 221 g, t.
It is desirable to set the correlation between the values of 7 so that l/=22<gs. However, this side spacing 2. Make the value too thick (don't take it too much, top,
The temperature of the side surface becomes too low compared to the bottom surface, and its adjustment is extremely difficult and difficult due to the high temperature environment.

The present invention eliminates the drawbacks of such conventional devices, and
The purpose of the invention is to provide an induction heating device configured in the following manner so that the surface temperature is always correctly maintained.k)
Ru.

In order to achieve this object, the present invention includes a temperature measurement device that detects the heating temperature of the side surface, and controls the surface of the side surface and the distance between the side inductors based on the detected temperature. i
j1. 1 pH device.

Hereinafter, the present invention will be explained based on accompanying drawings.

In addition, what is shown by the seven-dot chain line in Fig. m1 and Fig. 2 is what is added to the conventional device in the device of the present invention.

The upper and lower surface spacings t/ and 2 are set to almost the same value, and the upper and lower surface inductors / and 2 are respectively fixed, and the inductors /, y, and g are respectively fixed. The side surface of the slab 3 after passing is equipped with a sensing device, for example a temperature sensor, an optical thermometer l
/etc. The temperature value thus measured is sent to the control device/2 and compared with the reference temperature preset in the control device/2, and if it is higher than the reference temperature, the side spacing P3 becomes wider. As shown in FIG. The temperature of the side surface is always controlled to be the same as the temperature of the upper and lower surfaces.

In this case, it is preferable that the above control be automatically controlled using the oil gauge 1 wetness value, but it is also possible to manually measure the side temperature, control the side gap g3 based on the kneading, and position the side inductor. It is also possible to set.

However, in reality, deviations in the width direction of the advancing slab 30 may occur, so it is practical to use an automatic control method.

Since the device of the present invention is constructed and operates as described above,
This has the effect that it is possible to obtain an induction heating device that can always maintain the correct side temperature and supply slabs at the optimum temperature to the rolling mill.

Although the above example describes temperature control of a continuously cast slab, it is not limited to this and can be applied to edge temperature control of any thick metal ingot, and the side temperature is independent of both side temperature. It is also possible to set the

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating the configuration of an induction heating device that heats the end of a slab by providing upper, lower, and side inductors on the upper, lower, and side surfaces, respectively. What is shown by the 7-dot chain line is a diagram of one embodiment of the appendix of the present invention, and FIG. 2 is a right side view of FIG. 1. / , j , +...Top surface, bottom surface and side inductor, 3...
Slab, //... Temperature measuring device (temperature sensor, optical thermometer)
, 7.2...control device, R/+? , 2+f13...shown.

Claims (1)

[Claims] (1) In an induction heating device that heats the end of a thick metal block by arranging upper, lower, and side inductors on the upper, lower, and side surfaces thereof, respectively, with intervals between the upper, lower, and side surfaces, An induction device comprising: a temperature measuring device that detects the temperature of the side surface of the metal lump after heating; and a control device that controls the side spacing between the side surface of the metal lump and the side inductor based on the detected temperature. heating device. (,2) The upper surface, lower surface, and side spacing between each surface of the metal lump end and the upper surface, lower surface, and side inductor are 4, respectively.
When i, Ia, fs, each interval is 21゜ltj*
The induction heating device according to claim 1, wherein the relationship between fy and fy is set to 5 such that j/22<gy.