Improvement of Work Roll Bending Control System Installed at Plate Mill Stand

Gasyarov, Vadim R.; Radionov, Andrey A.; Loginov, B. M.; Voronin, Stanislav S.; Khramshin, Vadim R.

doi:10.1145/3057039.3057105

Cited by 14 publications

(7 citation statements)

References 5 publications

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“…The spindle bearing is located near the middle of the shaft. Each spindle is individually counterbalanced with a hydraulic cylinder, levers, and coupling rods vertically and (if using CVC plus ) horizontally [13,14]. Figure 1b shows why shock occurs when closing the play δ [15].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Torque Limitation Principle in the Main Line of a Mill Stand: Explanation and Rationale for Use

et al. 2019

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This paper substantiates why it is necessary to limit the dynamic loads in stand shafts when closing angular gaps. The paper is a feasibility study of a concept developed specifically to limit each of the factors that affect amplitude of the dynamic torque; limitations applied are determined on a case-by-case basis. The research team studied the components of elastic torque in a dual-mass electromechanical system of Mill 5000 caused by vibrations arising from the elasticity of transmission as well as from the vibrations caused by elastic collision itself. It is shown that the lowest possible pre-acceleration is necessary for decreasing the dynamic coefficient at a near-nominal load torque. A principle of limiting dynamic loads when closing an angular gap is proposed, which implies collecting tachograms of an electric drive subjected to positive or negative acceleration before and after the fed metal is captured. The research team has developed drive control principles to implement this approach. The recommendation is to upgrade the electric drives of the reversing stand in Mill 5000.

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Section: Introductionmentioning

confidence: 99%

Dynamic Torque Limitation Principle in the Main Line of a Mill Stand: Explanation and Rationale for Use

et al. 2019

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“…Эти параметры вычисляются циклично системой контроля планшетности и профиля уровня 2 [31,32]. Модуль DDC рассчитывает соответствующие поправки для зазора ΔS.…”

Section: тепловая выпуклость рабочего валка; износ валковunclassified

“…В заключение следует отметить, что совершенствование алгоритмов САРТ при прокатке листов расширенного сортамента является составной частью разработок, направленных на повышение точности геометрических размеров, улучшение профиля и планшетности листового проката. Результаты, полученные в данном направлении, опубликованы в работах [31,32,[40][41][42][43][44]. Исследования, направленные на совершенствование способов и цифровых алгоритмов управления мехатронными комплексами прокатных станов, продолжаются.…”

Section: настройка регулятора толщиныunclassified

Development of Digital Control Algorithms for the Mechatronics System Drives of Reversing Plate Mill Stands

2021

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Expanding the plate mill product range implies the improvement of control algorithms for the mechatronics control system drives of the reversing stands. The most important objectives include increasing the accuracy of geometric dimensioning and tolerancing, as well as improving the profile and surface flatness of rolled products. The structure explaining the automatic ROLL-GAP CONTROL concept is provided, which allows controlling the thickness and gap between SMS-Demag AG rolls. This concept is implemented in the '5000' mill stand of Magnitogorsk Iron and Steel Works. The structural diagram of the automatic gauge control system (AGS) is presented. The functional diagram of the hydraulic gap control (HGC) system is presented, which includes a fast proportional control channel and a relatively slow integral position control channel. The principle of automatic thickness control is discussed, implemented in the automatic gauge control (AGC) system of the mill stand TCS controller. The diagram and dependences are prepared for the calculation of the nonlinear thickness controller parameters. The functions of the RAC regulator are described, intended for compensation of the tensile difference (gap spacing) at the mill stand sides. The dynamic impact compensation system functions are considered. The removal of the roll bending and deformation control signals is substantiated. The disadvantages of AGC are noted for sheets with a thickness below 10 mm. The most dangerous case is the tearing of metal fragments from the rear sheet side caused by the incorrect operation of the gauge control system. A method for hydraulic gap control is proposed based on the fast increase of the roll gap in the rear part of the rolled sheet during the last passage when rolling thin sheets. The results of experimental studies made on the '5000' mill are presented. The efficiency of the proposed control method has been confirmed. The oscillograms of signals are presented characterizing thickness variations. HGC and AGC systems with the proposed adjustments are proven to provide high-accuracy hydraulic position control and thickness control along the sheet length and width.

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“…The objective was to find configurations of the rolling mills that shape the ingots to the desired dimensions. The authors in [4][5][6][7] address also related techniques to improve the performance of rolling mills in metallurgical industries. It is proposed a study by [8] on the rolling of plastic sheet in which plastic sheets need to be rolled with different thicknesses.…”

Section: Related Workmentioning

confidence: 99%

Stochastic Model For Setpoint of a Rolling Mill: An Application In The Soybean Oil Production

Ferreira

Arantes

et al. 2021

Preprint

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A scientific challenge on industrial production is to mathematically represent a production process, and this challenge increases when describing production processes with stochastic behavior. The present paper will be approaching a specific part of the production process of soybean oil, where the main objective is to maximize the oil extraction by keeping the thicknesses of the soybean flakes within an operating range. We propose a method, based on a mathematical stochastic model, to obtain pressure setpoints that produce flakes as ideal as possible for oil extraction. The results reported are achieved by applying the proposed method in the industry with improvements within the process in terms of time and quality.

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Improvement of Work Roll Bending Control System Installed at Plate Mill Stand

Cited by 14 publications

References 5 publications

Dynamic Torque Limitation Principle in the Main Line of a Mill Stand: Explanation and Rationale for Use

Dynamic Torque Limitation Principle in the Main Line of a Mill Stand: Explanation and Rationale for Use

Development of Digital Control Algorithms for the Mechatronics System Drives of Reversing Plate Mill Stands

Stochastic Model For Setpoint of a Rolling Mill: An Application In The Soybean Oil Production

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