tension control method for a rolling mill

tension control method for a rolling mill. Steel Wire Rolling Mill Machine Cold Rolling Mill Belt . A precision wire rolling mill is usually composed of stringer straightener horizontal two-high vertical two-high universal four-high tension device degreasing and cleaning device traction device take-up machine lubrication system cooling system

tension control method for a rolling mill

Simulating a Multi-Stage Rolling Mill Process, Part 3 Tension Control. From the series Simulating a Multi-Stage Rolling Mill Process. Alec Stothert, MathWorks. This webinar is the third in a three-part series that highlights the use of MathWorks products for modeling and control of a multistage rolling mill process. In this webinar, you will

Looper and tension control in hot rolling mills: A survey

Looper and tension control, shown in Fig. 2, is important in hot strip mills because they affect both the dimensional quality and the mass flow of a strip.The high strip tension between stands induces width shrinkage, thickness reduction and moreover can produce an edge wave on a strip.

Cited by: 68

US4137742A Interstand tension control method and

In a tandem rolling mill consisting of a plurality of rolling stands, an interstand tension control method including the step of computing the interstand tension on the basis of the detected values of the rolling force and rolling torque detected at an i-th rolling stand (where i is an integer less by more than one than the total number of the

Cited by: 22

Tension control method for a rolling mill Hitachi, Ltd.

Jul 31, 1979· In the control of the tension of a workpiece which is rolled by a tandem rolling mill, a tension control method for a rolling mill wherein the tension of a workpiece is controlled by a looperless tension control method employing no looper at the threading stage of the top end and at the tail-out stage, and it is controlled by a tension control method employing a looper during the steady rolling.

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

Reducing the roll gap increases the roll pressure to p3. Gage control in multiple rolling mills is achieved through measurement of strip thickness using x-ray gage and adjusting the strip tension using feedback control system. 1.8 Rolling defects: Mill spring is a defect in which the rolled sheet is thicker than the required thickness because,

File Size: 182KB

Control of Strip Tension in a Rolling Mill Based on

Control of Strip Tension in a Rolling Mill Based on Loopers and Impedance Control A. Steinboeck G. Mu hlberger A. Kugi Automation and Control Institute, Vienna University of Tec hnology,

File Size: 187KB

Automatic Tension Control in the Continuous SpringerLink

Oct 24, 2017· An improved method for automatic tension control is developed. It involves combining speed-difference tension control during free rolling and static-current tension control during multi-stand rolling on three stands. A functional block diagram of the system implementing the method is

Cited by: 1

(PDF) Speed Control of Steel Rolling Mill using Neural Network

Speed Control of Steel Rolling Mill using Neural Network as a comparison with the conventional control method for a practical worksheet data. height formation in steel rolling mill, and

CN101920267A Variable wrap angle flatness control

The invention provides a variable wrap angle flatness control parameter processing method for a cold rolling mill, which is used in a variable wrap angle flatness measuring system of a contact type cold rolling flattening roll and provides conditions for realizing precise flatness control. The measured value processing method presents the relation between the magnitude of radial force borne by

Author: 俞小峰, 候永钢, 刘佳伟, 刘军, 宋蕾, 张殿华, 曹忠华, 李丽霞, 王军生, 王鹏飞, 赵启林

Fuzzy looperless tension control for hot strip rolling

Currently, human operators are still employed in many rolling mills to manually suppress looperless interstand tensions. Having recognized the complexity of the process and the effectiveness of human-based control, a fuzzy control method is proposed for regulating looperless interstand tension.

Rolling of Steel in a Modern Long Product Rolling Mill

Jun 19, 2017· As the bar progresses through a continuous mill where the bar is rolled in multiple stands simultaneously, the stand speed must be controlled to ensure tension free rolling. The main methods of controlling the tension in the mill is with a tension free rolling speed control system and manually monitoring the current drawn by each motor as the

THE MECHANICS OF TENSION CONTROL

methods for doing this. • If you already have a load cell tension control, it normally has the ability to display actual tension in total pounds across the web. You can also purchase load cells with only a display (no control) if you would like to measure tension within any

Tension control method for a rolling mill Hitachi, Ltd.

Jul 31, 1979· In the control of the tension of a workpiece which is rolled by a tandem rolling mill, a tension control method for a rolling mill wherein the tension of a workpiece is controlled by a looperless tension control method employing no looper at the threading stage of the top end and at the tail-out stage, and it is controlled by a tension control method employing a looper during the steady rolling.

Understanding Rolling Process in Long Product Rolling Mill

Data collected at the end of a rolling with used rolls will not be accurate when rolling on new rolls. Tension control. In a continuous mill, speed matching the stand to achieve a constant mass flow through the mill assures a low cobble rate and fewer defects.

Automatic Tension Control in the Continuous SpringerLink

Oct 24, 2017· An improved method for automatic tension control is developed. It involves combining speed-difference tension control during free rolling and static-current tension control during multi-stand rolling on three stands. A functional block diagram of the system implementing the method is considered.

Modeling and Control of Multi Stage Rolling Mill Process

Sheet Rolling Mill processes involve progressive thickness reduction of continuous sheet metal in multiple stages. Some of the control variables of interest are exit thickness, throughput and the tension in the sheet as it passes from one stage to the other.

Tandem Cold Metal Rolling Mill Control: Using Practical

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.

60 YEARS OF ROLLING MILL TECHNOLOGY By Ford B. Cauffiel

including hydraulic screwdowns, hydraulic roll bend, and tension control. This book does not focus on these specific rolling mill manufacturers and their various methods of manufacturing and patentability. My intent in this book is to show the modern rolling techniques that

Rolling Mill Control Russula

Cascade control uses the reduction concept (R-Factor) to calculate the mill cascade speed reference. This parameter, directly related to rolling fundamentals, simplifies the setup and operator control. During production the loop and tension control automatically adjust the R- Factor, ensuring minimum material stress between the stands.

Fuzzy multiple stand tension control of a roughing rolling

In the steel rolling industry, control of the hot metal rolling process plays an important role in assuring high product quality and safe process operation. Although many advanced looper control technologies for finishing rolling process have emerged, looperless interstand tension control of roughing rolling mills remains a challenging problem.

Analysis of Startup Process and Its Optimization for a Two

The thickness control and tension establishing process of a five-stand tandem cold rolling mill (TCM) were analyzed using a linearization physical model based on dynamic tension differential equations and the thickness delay method by PHILLIPS . It is the origin of computer simulation of continuous rolling processes.

Looper and tension control in hot rolling mills: A survey

In order to solve the above problems, a state feedback H∞ control method based on a discrete-time model for looper-tension control systems in hot rolling mills is presented.

explain with block diagram of continuous hot rolling mill

A four high rolling mill is used for the hot rolling of armor and other plates as well as cold rolling of plates, sheets and strips. 4: Tandem rolling mills: It is a set /pics/ block diagrams of roll mill. explain with block diagram of continuous hot rolling mill schematic diagram of five roller millconceptmedicare.in . schematic diagram of

Basics of Web Tension Control Summary TAPPI

Basics of Web Tension Control Summary Presenter: Darrell Whiteside, Sales Channel Manager Tension Control Maxcess International This presentation is intended to take the mystery out of web tension control. It is intended for operators, designers and engineers who would like a better

Deformation Processing Rolling

Deformation Processing Rolling ver. 1. Prof. Ramesh Singh, Notes by Dr. Singh/ Dr. Colton 2 Overview • Process • Equipment • Products rolling mill Width of plate w is large without front and back tension p p

MILL CONTROL SYSTEM AND METHOD FOR CONTROL OF

MILL CONTROL SYSTEM AND METHOD FOR CONTROL OF METAL STRIP ROLLING STATEMENT REGARDING FEDERALLY SPONSORED DEVELOPMENT 2 FIG. 6 is a block diagram representation of an example overall control system structure embodying aspects of the present invention. FIG. 7 is a block diagram representation intended to facili­

Rolling (metalworking) Wikipedia

"Rolling mill" redirects here. For mills that use rollers to crush grain or stone, see roller mill. Rolling visualization. (Click on image to view animation.) In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform.

FUZZY TENSION CONTROL OF THE WIRE ROD ROUGHING

tension. In general, rolling with low tension in roughing mill is a fundamental condition to ensure the stable rolling quality [2], [3]. This paper proposes the fuzzy control structure for the roughing mill in Slovakia Steel Mills, a.s. Strážske. The given roughing mill consists of six rolling stands (STD), individually driven by motors

Rolling Mill Control Russula

Cascade control uses the reduction concept (R-Factor) to calculate the mill cascade speed reference. This parameter, directly related to rolling fundamentals, simplifies the setup and operator control. During production the loop and tension control automatically adjust the R- Factor, ensuring minimum material stress between the stands.

Robust Tension Control of Strip for 5-Stand Tandem Cold Mills

Various advanced methods have been developed to analyze and control rolling mills [6–11]. Among the previous investigations, some notes focus on tension control problem in cold rolling mills [12, 13]. There are numerous uncertainties and disturbances in the model of tandem cold rolling process . Thus, the control strategy for cold rolling

60 YEARS OF ROLLING MILL TECHNOLOGY By Ford B. Cauffiel

including hydraulic screwdowns, hydraulic roll bend, and tension control. This book does not focus on these specific rolling mill manufacturers and their various methods of manufacturing and patentability. My intent in this book is to show the modern rolling techniques that

THE MECHANICS OF TENSION CONTROL

methods for doing this. • If you already have a load cell tension control, it normally has the ability to display actual tension in total pounds across the web. You can also purchase load cells with only a display (no control) if you would like to measure tension within any

A SURVEY OF THE LOOPER-TENSION CONTROL

A SURVEY OF THE LOOPER-TENSION CONTROL TECHNOLOGY IN HOT ROLLING MILLS Il Seop Choi∗, Anthony Rossiter∗, Peter Fleming∗ ∗ Automatic Control & Systems Engineering University of Sheffield Sheffield S1 3JD, UK [email protected]ffield.ac.uk

Rolling of Steel in a Modern Long Product Rolling Mill

Jun 19, 2017· As the bar progresses through a continuous mill where the bar is rolled in multiple stands simultaneously, the stand speed must be controlled to ensure tension free rolling. The main methods of controlling the tension in the mill is with a tension free rolling speed control system and manually monitoring the current drawn by each motor as the

Simulating a Multi-Stage Rolling Mill Process, Part 3

Simulating a Multi-Stage Rolling Mill Process, Part 3: Tension Control. From the series: Simulating a Multi-Stage Rolling Mill Process. Alec Stothert, MathWorks. This webinar is the third in a three-part series that highlights the use of MathWorks products for modeling and control of a multistage rolling mill process. In this webinar, you will

Kunio Sekiguchi Inventions, Patents and Patent

Abstract: There is disclosed a looper control system for a continuous rolling mill comprising: a section for performing the integral operation of respective deviations between measured values and target values with respect to the tension and the looper angle, and the proportional operation of respective deviations between the tension, the looper operation angle, and the rotational

Tension Measuring Method and the Effect of Tension Control

This slight tension control is called the “Tension Free Control”. The main technical problem of such control is to detect the inter-stand tension without touching the strip. The tension measurement method shown in this paper is a method which, uses the motor torque and the rolling force of each stand.