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Rolling facility

A rolling equipment and rolling mill technology, applied in the field of induction heating device layout, can solve the problems of poor heating efficiency, poor heating efficiency, easy damage, etc., and achieve the effect of improving the temperature distribution of the steel plate

Active Publication Date: 2017-11-28
TOSHIBA MITSUBISHI ELECTRIC IND SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the heating device is a combustion device, the heating from the surface and the temperature rise efficiency are poor, and the effect beyond the coiling furnace cannot be expected.
In addition, in the case of making the inductor gap as close as possible to the steel plate in order to improve the efficiency as in the induction heating device, the accuracy of tension detection and tension control between the coiling furnace and the rolling stand does not improve even if pinch rolls are installed. On the other hand, when the tension of the steel plate is loose, it is considered that the steel plate is likely to be easily damaged when it comes into contact with the device when it is curled.
When the inductor gap is widened in a safe direction, the heating efficiency becomes poor or becomes impossible to heat
In addition, the heating device set up in this scheme is generally equipped with more high-priority sensors for automatic control of rolling, such as plate thickness gauge, plate width gauge, radiation thermometer, and steel plate detection, relative to the position where the rolling mill enters and exits. There are many cases where the installation space of the heating device cannot be obtained
In addition, the scheme and patent for improving the temperature distribution of the steel plate based on heating settings other than the coiling furnace, which are composed of multiple rolling mills, do not yet exist

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0049] figure 1 It is a schematic diagram which shows the rolling facility which concerns on 1st Embodiment.

[0050] Such as figure 1 As shown, a reversing steckel mill 1 (rolling facility) includes a pair of coiling furnaces 3 and a plurality of rolling stands 2 arranged between the respective coiling furnaces 3 . Each coiling furnace 3 is a coiling device having a heat preservation function. The reversing steckel mill 1 performs reversing rolling while heating a steel sheet by each coiling furnace 3 . In this example, two rolling stands 2 are installed between the respective coiling furnaces 3 . The number of rolling stands 2 is not limited to two, but may be three or more.

[0051] The reversing steckel mill 1 further includes a pair of strip heaters 28 and 29 (induction heating devices) and a pair of tension rolls 32 and 33 . A horizontal strip heater 28 (BH1) and a strip heater 29 (BH2) capable of changing the gap between the steel plates are arranged between the tw...

no. 2 Embodiment approach

[0073] Figure 7 It is a schematic diagram which shows the rolling facility which concerns on 2nd Embodiment.

[0074] Below, based on Figure 7 A second embodiment of the present invention will be described. In addition, in Figure 7 In , a part of the reversing steckel mill is extracted for illustration.

[0075] exist Figure 7 , between each rolling stand 2, instead of figure 1 The horizontal strip heaters 28, 29 in the middle, and the solenoid type strip heater 35 (BH1) and the solenoid type strip heater 36 (BH2) are set, and the strip heater 35 and the plate The tension roller 32 and the tension roller 33 which can be raised and lowered for inter-stand tension control are also arrange|positioned outside the belt heater 36.

[0076] Figure 8 It is a schematic diagram showing the heating principle of a solenoid-type strip heater.

[0077] Such as Figure 8 As shown, solenoid-type strip heaters 35 , 36 have coiled copper tubes 25 . In the strip heaters 35 and 36,...

no. 3 Embodiment approach

[0081] Figure 9 It is a schematic diagram which shows the rolling facility which concerns on 3rd Embodiment.

[0082] Below, based on Figure 9 A third embodiment of the present invention will be described. In addition, in Figure 9 In , a part of the reversing steckel mill is extracted for illustration.

[0083] Such as Figure 9 shown, in this example, instead of between the rolling stands 2 in figure 1 The tension roll 32 and the tension roll 33 for inter-stand tension control are arranged on the outside of the horizontal strip heater 28 and strip heater 29, and the inter-stand tension is controlled according to the load and torque variation of the two rolling stands 2. Detection and control of the tension between tensionless roll stands. Tension control is performed by the tension detection device 40 and the control unit 44 as described above. Thereby, the speed of the rolling mill is controlled, stable inter-stand tension control is performed, the contact between ...

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Abstract

Provided is a rolling facility equipped with: two coiler furnaces; multiple mill stands provided between the two coiler furnaces for the purpose of performing reverse rolling; and induction heating devices provided between the multiple mill stands for increasing the temperature in the lengthwise direction and the width direction of a steel sheet during a prescribed reverse rolling operation or each reverse rolling operation. Thus, it is possible to improve the temperature distribution of the steel sheet.

Description

technical field [0001] Embodiments of the present invention relate to a rolling facility. More specifically, it relates to reversible rolling in a rolling facility (so-called reversible steckel mill) having multiple rolling mills equipped with two coiling devices with a heat preservation function called coiling furnaces before and after the rolling mill Among them, in order to improve the temperature distribution of the steel plate, the layout of the induction heating device newly installed between the rolling mills and the steel plate temperature compensation method. Background technique [0002] In the reversing rolling of the reversing steckel mill, there are two coiling furnaces with a heat preservation function before and after the rolling mill, but the temperature of the front end, rear end, and width end of the steel plate detached from the coiling furnace will also increase. reduce. [0003] Therefore, as described in Patent Document 1 related to a reversing-steel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/00B21B1/34B21B37/48B21B37/74
CPCB21B37/48B21B37/74B21B38/06C21D8/0226B21B2265/06C21D8/0252C21D8/0426C21D8/0452C21D1/42B21B1/34Y02P10/25B21B45/004
Inventor 森田进一
Owner TOSHIBA MITSUBISHI ELECTRIC IND SYST CORP
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