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A method and device for controlling the starting thickness of a rolling mill

A thickness control and rolling mill technology, applied in rolling mill control devices, metal rolling, metal rolling, etc., can solve the problems of lower pass rate, thickness difference, and unavoidable thickness difference between roll change and start-up, so as to improve the product pass rate , reduce fluctuations, and ensure the effect of product qualification rate

Active Publication Date: 2020-12-11
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in actual production, what processing manufacturers must encounter every day is the roll change of the rolling mill. The thickness difference between the roll change and the start-up is also one of the main reasons for the belt to be produced. Due to the rigid changes of some rolling parameters, the roll change and start-up The thickness difference is inevitable
[0004] It can be seen that when changing rolls in the rolling mill in the prior art, thickness differences will be caused, and there is a technical problem of reducing the pass rate

Method used

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  • A method and device for controlling the starting thickness of a rolling mill
  • A method and device for controlling the starting thickness of a rolling mill
  • A method and device for controlling the starting thickness of a rolling mill

Examples

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Embodiment 1

[0037] This embodiment provides a method for controlling the starting thickness of a rolling mill, such as figure 1 shown, including:

[0038] Step S101, when the M rolling mills in the N rolling mills need to change the rolls, determine the size of the additional rolling force and the need to increase it according to the steel grade specifications rolled by the N rolling mills and the rack information of the M rolling mills K target stands of the additional rolling force; N, M and K are all positive integers, N is greater than or equal to M, and N is greater than or equal to K;

[0039] Step S102, taking the additional rolling force as an increment, setting and increasing the starting rolling force of the K target stands;

[0040] In step S103, the M rolling mills are changed rolls and started up.

[0041] It should be noted that according to the research, there are many factors that cause the difference in starting thickness, mainly due to the friction coefficient, rolling...

Embodiment 2

[0067] like Figure 4 As shown, a rolling mill start-up thickness control device is provided, comprising:

[0068] The determination module 401 is used for determining the magnitude of the additional rolling force according to the steel grade specifications rolled by the N rolling mills and the frame information of the M rolling mills when the M rolling mills in the N rolling mills need to change the rolls and K target stands that need to increase the additional rolling force; N, M and K are all positive integers, N is greater than or equal to M, and N is greater than or equal to K;

[0069] The adding module 402 is set to increase the starting rolling force of the K target stands with the additional rolling force as an increment;

[0070] The start-up module 403 is used to start up the M rolling mills by changing the rolls.

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Abstract

The invention discloses rolling mill lifting thickness control method and device. The rolling mill lifting thickness control method comprises the steps of when rollers of M rolling mills in N rollingmills need to be replaced, determining the magnitude of an additional rolling force and K target racks requiring the additional rolling force according to steel type specifications rolled by the N rolling mills and rack information of the M rolling mills, wherein N, M and K are positive integers, N is larger than or equal to M, and N is larger than or equal to K; adopting the additional rolling force as an increment, and setting a lifting rolling force for increasing the K target racks; and lifting for replacing the rollers for the M rolling mills. According to the method and the device provided by the invention, the technical problems that the thickness deviation is caused, and the qualification rate is reduced when the rollers are replaced for the rolling mills in the prior art are solved, and the product qualification rate is effectively improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel processing, in particular to a method and a device for controlling the starting thickness of a rolling mill. Background technique [0002] In cold rolling production, due to the continuous changes of various rolling parameters, the thickness after rolling will also fluctuate. In order to meet the strict requirements of customers for product thickness tolerance accuracy. The AGC system can not only adjust the pressure reduction, speed, second flow rate and other links through the feedback of the thickness gauge and speed gauge, but also has various control methods such as rolling mill bounce compensation, oil film bearing thickness compensation, roll eccentricity compensation, etc., with fast adjustment speed, It has the advantages of high adjustment accuracy and is widely used in major manufacturers. [0003] However, in actual production, what processing manufacturers must encounter ever...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/24
CPCB21B37/24
Inventor 姚军
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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