hot roll mill hydraulic system
Welcome to the broken dawn

hot roll mill hydraulic system

Modeling and Identification of Hydraulic System on

1994-7-1 · The identification of a hydraulic system on a hot rolling mill is described. The rolling mill is in operation at The Danish Steelworks Ltd. in Frederiksværk, Denmark. The hydraulic system is used for thickness control of the rolled plates. A non linear model for the system is

Hot Rolling | Nippon Yakin

This rolling mill is a Steckel type of reversing finishing mill capable of producing hot strips with superior thickness precision, surface quality and internal quality. This mill can roll not only stainless steels but also heat resistant alloys and steels or other high alloyed

(PDF) Hot rolling mill hydraulic gap control (HGC ...

2015-1-1 · The mill stretch compensation and other disturbances during the rolling process are compensated and a rolling speed dependent, adaptive PI controller is

Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ...

2015-11-4 · The hot rolled strip is later processed by a cold rolling mill, and to facilitate the threading operation, tapering is applied. Tapering is activated by a sensor which is located at a given distance from the mill stand on the rolling table at the entry side, and gives a signal when the strip end is in a given distance. This signal activates the tapering function, so the rolling thickness set-point is decreased

Modeling and Simulation of Electric-hydraulic Control ...

2008-9-8 · Abstract—Hydraulic bending roll system has become one of key equipments to control the exit strip shape in strip rolling mills. The hydraulic bending roll system of a hot rolling mill was researched and analyzed, and its mathematics models were founded in whole based on the action principle of some representative hydraulic components.

Highest performing Hot Strip Mills | Primetals Technologies

MSD is a hydraulic cylinder installed to mill housing window and press a roll chock against the opposite side with constant force. MSD eliminates gap between roll chocks and mill housing, keep rolls in proper position and stabilize rolls. Enables stable rolling at demanding rolling condition.

Modelling of the hydraulic work roll bending control ...

For modern hot rolling mills the typical hydraulic circuit was designed to control the roll bending force during rolling process. The most common operating modes of the roll bending system were studied: rolling, start and stop.

The Hot Rolling Process - California Steel

The Hot Rolling Process The primary function of the Hot Strip Mill is to reheat semi-finished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77,000 hp, and finally coiling up the lengthened steel sheet for transport to the next process.

1. Hot rolling and rolling defects: 1.1 Front and back ...

2019-2-4 · the rolls get deflected by high rolling forces. Elastic deformation of the mill takes place. If we use stiffer rolls, namely roll material of high stiffness or elastic constant, we could avoid mill spring. Normally elastic constant for mills may range from 1 to 4 GNm-1. Roll elastic deformation may result in uneven sheet thickness across.

A BASIC UNDERSTANDING OF THE MECHANICS OF

2003-10-15 · Secondary scale on hot strip and the impact on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest - also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

(PDF) Hot rolling mill hydraulic gap control (HGC ...

The structure of an existing AGC system has been analyzed and m odified to. introduce a thickness feedback control, with in a hot ro lling mill system. In order. to avoid thickness oscillation at ...

Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ...

2015-11-4 · 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.

[PDF] Hot Rolling Mill Hydraulic Gap Control ( HGC ...

2015-6-6 · In this article the AGC (Automated Gauge Control) system, of a hot rolling mill is analyzed and different methods are described to improve its performance. The mill stretch compensation and other disturbances during the rolling process are compensated and a rolling speed dependent, adaptive PI controller is developed to accomplish fine thickness control. The improved system has been validated ...

Modernization of the hot plate rolling mill thickness ...

2017-10-27 · The paper presents a methodology to control the hydraulic gap device of a thick plate rolling mill. The method is based on modeling the next metal pass of through the rolls and on the preliminary calculation of the hydraulic pressing device movements values during the rolling process. The results of this method are compared with an indirect method of thickness measuring. Based on the conducted ...

Modeling and Simulation of Electric-hydraulic Control ...

2008-9-24 · Hydraulic bending roll system has become one of key equipments to control the exit strip shape in strip rolling mills. The hydraulic bending roll system of a hot rolling mill was researched and analyzed, and its mathematics models were founded in whole based on the action principle of some representative hydraulic components. At last, the hydraulic bending roll system was simulated with

The Hot Rolling Process - California Steel

The Hot Rolling Process The primary function of the Hot Strip Mill is to reheat semi-finished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77,000 hp, and finally coiling up the lengthened steel sheet for transport to the next process.

1. Hot rolling and rolling defects: 1.1 Front and back ...

2019-2-4 · the rolls get deflected by high rolling forces. Elastic deformation of the mill takes place. If we use stiffer rolls, namely roll material of high stiffness or elastic constant, we could avoid mill spring. Normally elastic constant for mills may range from 1 to 4 GNm-1. Roll elastic deformation may result in uneven sheet thickness across.

Closed-Loop System in Hydraulic Automatic

2019-10-18 · control approach for the thickness profile of strips in a tandem hot rolling mill [9]. Kovari [10] studied the e ect of internal leakage in a hydraulic actuator on dynamic behaviors of the hydraulic positioning system. Li et al. [11] presented a robust output-feedback control algorithm with an

The Work Roll Bending Control System of the Hot Plate ...

2015-1-1 · The reasons of rolls bending under the rolling pressure are found. Examples of using the different structures for the implementation of the roll bending system are shown. The results of the system were considered in the hot rolling plate mill conditions. © 2015 The Authors.

Dynamic matrix predictive control for a hydraulic looper ...

2017-7-9 · Controlling the looper height and strip tension is important in hot strip mills because these variables affect both the strip quality and strip threading. Many researchers have proposed and applied a variety of control schemes for this problem, but the increasingly strict market demand for strip quality requires further improvements. This work describes a dynamic matrix predictive control (DMC ...

[PDF] Hot Rolling Mill Hydraulic Gap Control ( HGC ...

2015-6-6 · In this article the AGC (Automated Gauge Control) system, of a hot rolling mill is analyzed and different methods are described to improve its performance. The mill stretch compensation and other disturbances during the rolling process are compensated and a rolling speed dependent, adaptive PI controller is developed to accomplish fine thickness control. The improved system has been validated ...

Modernization of the hot plate rolling mill thickness ...

2017-10-27 · The paper presents a methodology to control the hydraulic gap device of a thick plate rolling mill. The method is based on modeling the next metal pass of through the rolls and on the preliminary calculation of the hydraulic pressing device movements values during the rolling process. The results of this method are compared with an indirect method of thickness measuring. Based on the conducted ...

Modeling and Simulation of Electric-hydraulic Control ...

2008-9-24 · Hydraulic bending roll system has become one of key equipments to control the exit strip shape in strip rolling mills. The hydraulic bending roll system of a hot rolling mill was researched and analyzed, and its mathematics models were founded in whole based on the action principle of some representative hydraulic components. At last, the hydraulic bending roll system was simulated with

(PDF) Simulation of rolling mill's electro-hydraulic gap ...

The basic aim of the paper is to monitor the parameter fluctuation of the Hydraulic Gap Control system in a Hot Rolling Mill and detect the alteration of internal leakage resistance at Capsule's ...

Closed-Loop System in Hydraulic Automatic

2019-10-18 · control approach for the thickness profile of strips in a tandem hot rolling mill [9]. Kovari [10] studied the e ect of internal leakage in a hydraulic actuator on dynamic behaviors of the hydraulic positioning system. Li et al. [11] presented a robust output-feedback control algorithm with an

Looper and tension control in hot rolling mills: A survey ...

2007-7-1 · The role of a hot strip mill process is to roll the slabs produced in a continuous casting process and produce strips of thickness 0.8–20 mm. Fig. 1 shows a typical layout of a hot strip mill. Slabs are heated up to around 1200 °C in reheating furnaces and then rolled on two reversing roughing mills which reduce the thickness of bars to ...

The Work Roll Bending Control System of the Hot Plate ...

The work roll bending control system of the hot plate rolling mill ... equipped with a work roll bending system (WRBS) [4]. WRBS has a hydraulic cylinders at the roll edges, which create a ...

The Work Roll Bending Control System of the Hot Plate ...

2015-1-1 · The reasons of rolls bending under the rolling pressure are found. Examples of using the different structures for the implementation of the roll bending system are shown. The results of the system were considered in the hot rolling plate mill conditions. © 2015 The Authors.

Upgrading of Hot Finishing Mill to 4-Stands, and ...

2016-5-25 · roll bender (WRB) and taper piston (TP) roll). (3) Adoption of high-response hydraulic screw-down sys-tem and high-response mill drive system to prevent tension fluctuation between stands and improve thick-ness correction capability. (4) Provision of side guides to prevent snaking of the strip--hydraulic at the entry side of hot finisher, F0 and F1

Real-Time Test Environment for Hydraulic Gap Adjustment ...

Hardware-in-the-Loop (HIL) test is an effective platform for developing and testing complex real-time systems and allows the engineer to examine units or equipments with greater test coverage compared to physical testing alone. Expensive and unique electro-hydraulic servo systems, which are applied in Hydraulic Gap Adjustment Systems in Hot Rolling Mills, are hard to test in different ...

Copyright © 2021.Company name All rights reserved.Dawn Broken
E-mail: