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Rolling mill zero setting rolling pressure collecting method

A technology of rolling pressure and collection method, which is applied in the field of roll gap zero adjustment of rolling mills, and can solve the problems of excessive zero line speed, inaccurate roll gap zero compensation, unreal data, etc.

Inactive Publication Date: 2007-07-18
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two problems in this general method: (1) Use the basic automatic zero adjustment start signal to activate the measured rolling pressure acquisition. If the eccentric force exceeds the limit, the pressure difference on both sides exceeds the limit, and the zero adjustment line speed exceeds the limit, etc. False data may be collected due to unsuccessful zeroing
(2) The acquisition period adopts a fixed time length (such as 1.5s), which is not an integral multiple of the roll rotation time. Due to the objective existence of roll eccentricity and other problems, the collected data cannot accurately and completely describe the variation law of rolling pressure. Based on this, the zero position compensation of the roll gap calculated by the average zero rolling pressure is not accurate enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Taking the F4 rolling mill in a rolling mill unit of a steel mill as an example, the specific steps of collecting data and calculating the zero position compensation of the roll gap are as follows.

[0019] (1) Rolling mill modulus K=419T / mm, backup roll diameter R=1226mm, work roll diameter r=613mm. Set the boundary conditions for the zero adjustment of the roll gap: the linear speed of the roll is s=2.5m / s, and the standard zero adjustment pressure is F 0 =1000T.

[0020] When the roll gap zeroing program of the F4 mill is started, that is, the hydraulic cylinder is pressed down under the finish rolling, the finishing rolling process machine starts to collect the zeroing signal, and the detection system checks the relevant boundary conditions, including whether the roll line speed and the standard zeroing pressure are within the set Within the required range of the fixed value, that is, the linear speed of the roll is 2.5±0.5m / s, and the standard zeroing pressure is ...

Embodiment 2

[0030] Taking the F6 rolling mill in a rolling mill unit of a steel mill as an example, the specific steps of collecting data and calculating the zero position compensation of the roll gap are as follows.

[0031] (1) The modulus of the rolling mill is K=450T / mm, and the diameter of the backup roll is R=1280mm. Set the boundary conditions for the zero adjustment of the roll gap: the linear speed of the roll is s=2.5m / s, and the standard zero adjustment pressure is F 0 =1000T.

[0032] When the roll gap zeroing program of the F6 mill is started, that is, the hydraulic cylinder is pressed down, the finishing rolling process machine starts to collect the zeroing signal, and the PLC system checks the relevant boundary conditions, including whether the roll line speed and the standard zeroing pressure are set The value is within the required range, that is, the roll line speed is 2.5±0.5m / s, and the standard zeroing pressure is 1000±50T. If all conditions are met and it can remain...

Embodiment 3

[0040] Taking the F2 rolling mill in a rolling mill unit of a steel factory as an example, the specific steps of collecting data and calculating the zero position compensation of the roll gap are as follows.

[0041] (1) The modulus of the rolling mill is K=435T / mm, and the diameter of the backup roll is R=1269mm. Set the boundary conditions for zeroing the roll gap: the linear speed of the roll is s=1.5m / s, the standard zeroing pressure F 0 =1000T.

[0042] When the roll gap zeroing program of the F2 mill is started, that is, the hydraulic cylinder is pressed down under the finish rolling, the finishing rolling process machine starts to collect the zeroing signal, and the PLC system checks the relevant boundary conditions, including whether the roll line speed and the standard zeroing pressure are within the set Within the required range of the fixed value, that is, the roll line speed is 1.5±0.3m / s, and the standard zeroing pressure is 1000±50T. If all conditions are met an...

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Abstract

A method for acquiring the rolling pressure when the gap between two rollers is adjusted to zero includes such steps as setting up the marginal condition for adjusting the gap between two rollers, such as the line speed of roller and standard zero adjusting pressure, transmitting 'zero adjusting success' signal if detected condition meats the marginal one, acquiring n pressure specimen value in the time period t, where t=N*pi*R / S, calculating their arithmetic average value, and calculating the zero compensation of said gap.

Description

technical field [0001] The invention relates to a production process of hot-rolled strip steel in the metallurgical industry, in particular to a method for zero-adjusting the roll gap of a rolling mill. Background technique [0002] The rolling mill, especially the finishing mill, needs to zero-adjust the roll gap before rolling and collect the rolling pressure. For example, the roll gap of the rolling mill is measured under a pre-pressure of 1000T, which is used as the initial value of the roll gap adjustment during the rolling process and carried out. Roll gap zero compensation. Roll gap zero compensation refers to the roll gap zero compensation due to the error between the measured zero-adjusted rolling pressure and the standard zero-adjusted rolling pressure during the process of zero-adjusting the roll gap of the finishing mill. The collection of zero rolling pressure of the finishing mill is to reduce the influence of the eccentric force of the roll on the zero positi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B38/08B21B37/58
Inventor 吕敬东佘广夫张芮
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES