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Reversible cold rolling mill flow quantity AGC band thickness control method

A strip thickness and rolling mill technology, applied in the direction of rolling mill control device, material size control, non-electric variable control, etc., can solve the problems of no flow AGC, low output, etc., and achieve the effect of improving control accuracy and increasing yield

Inactive Publication Date: 2008-02-06
中国一重集团有限公司 +1
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AI Technical Summary

Problems solved by technology

In recent years, this technology has been continuously developed and improved. In the hydraulic AGC control of the multi-stand continuous rolling mill, the thickness control technology of flow AGC (that is, automatic control of strip flow thickness) is introduced. The principle of constant mass flow after rolling realizes strip thickness control and high product quality, but there is no application of flow AGC thickness control technology in the control of single-stand reversing cold rolling mills with low output and high quality

Method used

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  • Reversible cold rolling mill flow quantity AGC band thickness control method
  • Reversible cold rolling mill flow quantity AGC band thickness control method

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Embodiment Construction

[0019] As shown in Figure 1 and Figure 2, the flow AGC thickness control function is an integral part of the hydraulic AGC rolling mill thickness automatic control system, and is an outer ring of the rolling mill roll gap thickness control. This control loop will detect and feed back the inlet thickness, speed, outlet speed, and thickness setting signals through the calculation of the flow AGC mathematical model equation to obtain the theoretical outlet thickness difference and the corresponding adjustment of the rolling mill roll gap deviation to be compensated, that is, δS h , this adjustment amount δS h Then, the output is adjusted by the inner ring of the hydraulic AGC (that is, the hydraulic APC), so that the servo cylinder of the rolling mill changes, and the roll gap and rolling pressure of the rolling mill also change accordingly according to the control amount requirements, thereby reducing the thickness deviation of the strip. achieved the purpose of control.

[002...

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Abstract

The invention discloses a flow AGC strip thickness control method of a reversing cold rolling mill, which comprises detecting steps of strip thickness and speed at the input and output of the rolling mill, detecting and computating steps of stiffness coefficient of the rolling mill and plasticity coefficient of strip, control steps of precontrolling AGC, monitoring AGC and hydraulic pressure APC in the control of the hydraulic pressure AGC. The invention is characterized in that the flow AGC strip thickness control method of a reversing cold rolling mill, comprises a establishing steps of a mathematical model of the flow AGC control, computating steps of strip theoretical thickness difference at the output of the rolling mill, computating steps of gap compensation regulation of the rolling mill; the cap regulation of delta Sh of the flow AGCregulated by a PI regulator ,is used as the thickness control of the rolling mill, that is, steps of thickness closed ring control of gap compensation of the endocyclic hydraulic pressure AGC of the hydraulic pressure AGC. The invention has real-time thickness compensation without a time delay and is suited to being widely popularized in AGC system of strip single stand reversing cold rolling mill.

Description

technical field [0001] The invention relates to an automatic control method for strip thickness applied to steel rolling equipment in the metallurgical industry, and for a single-stand reversible cold rolling mill, in particular to a flow AGC strip thickness control method for a reversible cold rolling mill. Background technique [0002] A notable feature of the development of the steel industry in this century is that competition has intensified and the focus is on the quality and cost of steel. Plate and strip are mainly used for punching various parts. In order to improve the life of the punching die and high stamping precision, it is required to have high thickness precision and good shape of the plate and strip. Therefore, high-quality, low-cost, high-yield plate and strip rolling is the ultimate goal pursued by manufacturers. [0003] Hydraulic AGC (Automatic Gauge Cortrol is hydraulic thickness automatic control), which includes hydraulic APC (hydraulic automatic po...

Claims

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Application Information

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IPC IPC(8): B21B37/24G05D5/02
Inventor 邢德臣郭泓杨庆光
Owner 中国一重集团有限公司
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