Plate thickness control device of tandem cold mill

A technology of tandem cold rolling mill and control device, applied in rolling mill control device, metal rolling, metal rolling, etc., can solve the problems of plate thickness fluctuation, high rolling load, inability to ensure plate thickness, etc., and achieve high-precision control , The effect of suppressing plate thickness deviation

Active Publication Date: 2018-06-26
TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, in the rolling of a thin material near the minimum rollable thickness, the friction coefficient in the roll pass of the downstream stand fluctuates greatly depending on the rolling speed, and the rolling load changes. plate thickness change
Therefore, if the thickness at the entrance side of the final stand cannot be controlled, the thickness at the entrance side of the final stand fluctuates according to the rolling speed, and the precision

Method used

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  • Plate thickness control device of tandem cold mill
  • Plate thickness control device of tandem cold mill
  • Plate thickness control device of tandem cold mill

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Embodiment 1

[0042]

[0043] figure 1 It is a figure for demonstrating the structure of the cold-rolled sheet-thickness control system which concerns on Embodiment 1 of this invention. The tandem cold rolling mill according to Embodiment 1 includes a plurality of rolling stands. figure 1 A tandem cold rolling mill with 5 rolling stands is described in .

[0044] The five rolling stands are the first stand 1, the second stand 2, the third stand 3, the fourth stand 4 and the fifth stand 5 in order from the upstream side. Piece 6 to direction 7 ( figure 1 from left to right) are rolled.

[0045] Each stand has work rolls, a speed control and a reduction control. Specifically, the i-th stand (i is a natural number, and i≦n, n=5) has: a pair of i-th work rolls ( 11 to 15 ) for rolling the rolling stock 6 ; An i-th speed control device (21-25) for controlling the peripheral speed; and an i-th reduction control device (31-35) for controlling the roll gap of the i-th ...

Example Embodiment

[0072] Embodiment 2

[0073]

[0074] Below, refer to image 3 , the second embodiment of the present invention will be described. image 3 It is a figure for demonstrating the structure of the cold-rolled sheet-thickness control system which concerns on Embodiment 2 of this invention. image 3 The system configuration shown is the same as that except that the rack inlet side plate thickness calculation unit 43 and the third plate thickness control unit 44 are added. figure 1 same.

[0075] The system according to Embodiment 2 is the same as that of Embodiment 1, but differs in that the plate thickness on the outlet side of the third rack 3 is calculated and controlled to the target plate thickness. Hereinafter, only operations different from those of the first embodiment will be described.

[0076]

[0077] The stand entry side plate thickness calculation unit 43 receives the actual measurement value of the rolling load measured by the fourth reduction control device ...

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Abstract

The invention provides a plate thickness control device for a tandem cold mill. Even when a plate thickness gauge is not arranged on an inlet side of a final frame, thickness variation of the inlet side of the final frame can be suppressed, so as to seek accuracy improvement of thickness of a product. The plate thickness control device of the tandem cold mill includes a mass flow plate thickness calculating unit (41) and a second plate thickness control unit (42). The mass flow plate thickness calculating unit (41) calculates mass flow plate thickness of the inlet side of the nth frame (5) based on a measured value of outlet side plate thickness measured by the outlet side plate thickness gauge (10), a measured value of outlet side plate speed measured by an outlet side plate speedometer (9), and a measured value of inlet side plate speed measured by an inlet side plate speedometer (8). The second plate thickness control unit (42) controls rolling load in the (n-1)th frame (4) so thatmass flow plate thickness calculated by the mass flow plate thickness calculating unit (41) and a target value of the inlet side plate thickness of the nth frame (5) are the consistent.

Description

technical field [0001] The present invention relates to a thickness control device for a tandem cold rolling mill, and more particularly to a thickness control device for a tandem cold rolling mill for controlling a rolled material to a desired thickness in relation to a process of rolling a metal or the like. Background technique [0002] In recent years, the precision required for the plate thickness of the rolled piece has been continuously improved. Especially in the case of electrical steel sheets, since the steel sheets are laminated when manufacturing electric motors or transformers, high-precision thickness control is required. [0003] Generally, a tandem cold rolling mill is provided with a plurality of plate thickness gauges, a plate speed gauge, and a tension gauge, and the plate thickness is controlled so that the plate thickness becomes a specified product plate thickness. Various board thickness control devices have been developed heretofore. [0004] For ex...

Claims

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Application Information

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IPC IPC(8): B21B37/16
CPCB21B37/16B21B37/165B21B2261/04
Inventor 新居稔大
Owner TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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