Rolling Mill Shape Control System Description. Cold rolling mills are an abundant source of control problems. Typically, the stand consists of a small diameter work roll and a larger backup roll on each side of the steel strip. Significant amounts of energy are required to achieve the desired thickness reduction.
In this paper a fully neural network-based structure have been proposed to control speeds of rolling stands of a steel rolling mill. The structure has property of …
description of the cold rolling process is presented. In Section 3, a mathematical model has been driven for sin-gle-stand cold rolling mill. In Section 4, architecture and learning algorithm Fuzzy Neural Networkof have been presented. In Section 5, thickness control with roll ec-centricity compensation has been proposed. In Section 6,
The flatness control in cold rolling mill is carried out through automatic flatness control (AFC). The control tasks which are to be achieved in the Level 1 closed-loop control for cold rolling mill concerns not only the thickness (AGC) but also the flatness (AFC). For a strip subject to cold rolling, the flatness is defined as the amount of ...
Control of heavy plate mills (feedforward thickness control) Online-Adaptation of model parameters for model based control; Description. In heavy plate rolling, the heated plates are plastically deformed by rolling mills. For this task, reversing …
In this paper a fully neural network-based structure have been proposed to control speeds of rolling stands of a steel rolling mill. The structure has property of controlling the motors speed such ...
Rolling mill controls generally are concerned with effecting a change in the roll setting as a function of a change in the rolling pressure. Prior patents that, at least in part, envision such a control are U. S. Pat. No. 2,726,541 that issued to R. B. Sims on Dec. 13, 1955 and No. 3,496,743 that issued to M. D. Stone on Feb. 24, 1970.
Hot Rolling Mill. Lower Costs, Reduce Time to Market and Improve Quality. During the hot rolling mill process, many factors are taken into account to ensure the final rolled product meets the desired thickness tolerances and ultimate quality requirements.
Hot Rolling Mill Hydraulic Gap Control. 13 diculties in control of rolling mills the environment in a hot strip mill is very harsh heat vibrations large forces and dust are constantly aecting equipment such as actuators and sensors a failing sensor or a leaking hydraulic valve may have large impact on control performance.
3.1 Key Feature of Process Control: Detection of Periodic Defects Rolls and rollers are the most heavily used parts of a rolling mill. Due to wear from contacting hot material with great force, their lifetime is limited. Although rolls are refurbished in the roll shop regularly, they occasionally crack before the end of the usual production cycle.
Rolling Mill Tutorial. Before continuing, make sure you have read Chapter 5. System Description. Another control problem (besides the continuous caster) arising in the steel industry is the control of the exit steel thickness in a rolling mill. The diagram below shows the layout of a rolling mill, with thick steel going in one side, and thin ...
Tandem Cold Metal Rolling Mill Control deals primarily with a novel and practical advanced method for control of the tandem cold metal rolling processes based on the state-dependent Riccati equation technique which is recently emerging as a useful method for control of complex nonlinear systems. Background material is presented to assist the ...
Considers some of the distributed aspects of the control of modern metal rolling mills. Such mills have a range of ever more ambitious targets, for example product quality, yield, metallurgy and throughput. These aims are supported by high levels of mill sophistication, in terms of plant equipment, instrumentation, actuators and control hardware. In spite of this …
Firstly this paper proposes a lumped-parameter hot-rolling mill model. The rolling mill examined is reversible and equipped with an independent speed control …
Aimed at the complex demand of hot strip rolling mill in practicing, the configuration of the coiler and the technological process is analyzed. The arithmetic of coiling tension and the control process is introduced. The frame of the tension …
Rolling Mill Control. N-EM-CL Rolling Mill Control. 6.2.2.1.- MANUFACTURING SYSTEMS. INNOVATIVE SYSTEMS "N-EM-CL" represents an automatic laminate control system, which produces metallic plates with different thickness. See general description. Catalog Catalog ...
A control system for a rolling mill having a pair of housings, at least two rolls supported at their ends within said housings with a gap defined between said rolls, and a pair of hydraulic cylinders respectively operatively associated with said pair of housings for varying said gap defined between said rolls in order to prevent abnormal ...
Hot Rolling Mill. Lower Costs, Reduce Time to Market and Improve Quality. During the hot rolling mill process, many factors are taken into account to ensure the final rolled product meets the desired thickness tolerances and ultimate quality requirements.
In tandem hot strip rolling mills, the roll speed of the mill stands is synchronized to ensure a uniform mass flow. A uniform mass flow is desirable to keep the strip tension constant and thus avoid large movements of the loopers which are located between the mill stands in order to control the strip tension.
P. Kucsera et al. Hot Rolling Mill HGC Thickness Control Improvement – 98 – Another way to determine the thermal expansion of the work roll is the modelling of the heat transfer between the work rolls and the strip.
The high-precision rolling mill speed control system must have higher precision for given regulated power supply. Therefore, when designing the system control scheme and formulating the control circuit, it is necessary to pay great attention to the design and selection of the regulated power supply. The stabilized power supply consisting of ...
Firstly this paper proposes a lumped-parameter hot-rolling mill model. The rolling mill examined is reversible and equipped with an independent speed control system for each work roll (two single ...
[2] Li, F.Y. (2009) Automatic Control and Application of Hot Rolled Plate Coiling Machine. Mechanical and Electrical Engineering, 38, 36-38. (In Chinese) [3] Huang, Y. (2008) Designing of Hot Strip Rolling Mill Control System Based on PLC. Electrical Transmission, 38, 56- 59. (In Chinese) [4] Yu, C.Z. (2009) Hot Rolling Coiler Tension Control.
FirstOpNet DCS system for Cold Rolling Mills with adaptive control. The DCS control system designed by First Control is based on modern control technology with self-tuning control to achieve maximal production performance. Experience from several installations shows that the self-tuning regulator reduces the thickness deviations by 50-75% ...