tension control method for a rolling mill

article{JanabiSharifi2002FuzzyMS title={Fuzzy multiple stand tension control of a roughing rolling mill} author={Farrokh Janabi-Sharifi and Guan-shi Li} journal={2002 Annual Meeting of the North American Fuzzy Information Processing Society Proceedings NAFIPS-FLINT 2002 ( No 02TH8622 To weaken the influences of uncertainties and system coupling items on the coordinated tracking control performance of the speed and tension system of a reversible cold strip rolling mill a control strategy is proposed based on nonlinear disturbance observers (NDOs) dynamic surface backstepping control and neural network adaptive approximation

Strip Thickness Control of Cold Rolling Mill with Roll

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

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

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Do not attempt this method of measuring tension if there is a drive motor on the unwind or for a rewind with a drive motor Serious injury could result if this method of measuring tension is attempted when there is a drive motor at the unwind or rewind zone • Tension can also be calculated if you know the model of a brake or clutch the

proposed control system calculates the necessary ad A Method to Determinate the Thickness Control Parameters in Cold Rolling Process through Predictive Model via Neural Networks The single stand rolling mill governing equation is a non-linear function on several

Flatness Control System of Cold Rolling Process with

shape control that has a closed loop of a shape roll and a rolling mill as shown in Fig 9 This has enabled high-speed and stable rolling without relying on operator skills 3 1 Shape analysis Figure 10 shows the concept of shape analysis The average rolling tension and the tension deviation for each rotor are determined from the load applied to

The control of rolling is done by a machine or rolling mill From a control point of view it is necessary to study the combined behavior of machine and metal deformation to find the variables that may be used to most effectively regulate the process A typical problem in this area is to control the output thick-

In a metal rolling process rolls stands bearings housing motors and other mechanical equipment are all a necessary part of the manufacturing operation The place where all the equipment for metal rolling manufacture is set up is called a rolling mill Rolling mills often vary in the type number and position of rolls

The rolling process is shown in Fig 2 1: Rolling is done both hot and cold It is accomplishes in rolling mills A rolling mill is a complex machine having two or more working rollers supporting rollers roll stands drive motor reducing gear flywheel coupling gear etc

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 adjusting system is given The coiler control system hardware is designed The system is designed

between rolling stand the mass flow control system is required to regulate the stored loop length and change the speed of the drive mill motor Of the control sys-tems that can directly or indirectly influence the specifications of the HSMP the looper control system whose controlled outputs are the strip tension and

tension control is ensured to be finished Otherwise the torque values will contain some disturbance signals which are not caused by tension variations leading to errors of estimation and regulation Minimum Tension Control Program The minimum tension control program with adaptability and some dead zone limit features is shown in Fig 1

In this paper the unified gauge-tension control problem is formulated by defining the exit strip thickness of stands and interstand tensions as controlled outputs It is shown that cold rolling process can be described by a nominal model perturbed by an additive uncertainty This model is used to design a robust tracking controller based on H∞ control theory to ensure robust

Rolling (metalworking)

Hot rolling is a metalworking process that occurs above the recrystallization temperature of the material After the grains deform during processing they recrystallize which maintains an equiaxed microstructure and prevents the metal from work hardening The starting material is usually large pieces of metal like semi-finished casting products such as slabs blooms and

Single Stand Double Coiling Aluminum Hot Rolling Mill Rough rolling is carried out on a reversible rolling mill with a thickness of 18-25 mm After double-coiling reversible finishing rolling the minimum rolling thickness is 2 5 mm and the production capacity can reach 150 000 tons per year This method is better than single stand and single

rolling mill using different system for tension inferential control The finished studies prove that size alignment is provided with the tension control system affecting speed of the further stands The paper verifies that the characteristics of the rolling mill including aligning ability depend on the rolling speed It is a good practice to

We describe an integrated tension controller design for a tandem cold rolling mill in steel plants To achieve stable rolling and ensure strip quality it is very important to control the tension of the cold rolling mill Previous researches examined only the operation of a single stand But it is not sufficient to examine the operation and effect of whole stands because the

We describe an integrated tension controller design for a tandem cold rolling mill in steel plants To achieve stable rolling and ensure strip quality it is very important to control the tension of the cold rolling mill Previous researches examined only the operation of a single stand But it is not sufficient to examine the operation and effect of whole stands because the

A method of coiling a thin strip on a tension reel which comprises coiling a strip rolled to a thickness of not more than 0 3 mm through a last stand of a cold tandem mill at different values of delivery side tension of the last stand and coiling tension produced by arranging a tension control means between the last stand and the tension reel

the adaptive control of rolling speed such as the wavelet neural network the Particle Swarm Optimization[2 3] In order to control the change of rolling force in a better w fuzzyay control and neural network intelligent optimization method are applied to rolling force prediction[4 5]

6 High Reversible Cold Rolling Mill 1 CRM Complex6 High Reversible Cold Rolling Mill Training Manual0 2 LINE VIEW 1 3 SCHEMATIC DIAGRAM OF 6 HIGH ROLLING MILLS Hydraulic jack Back Up roll Back up rolls Intermediate Pinch rolls Pinch Rolls rolls Pinch rolls Shear Shear Work rolls Uncoiler Uncoiler Recoiler Bottom foundation 2 4 INTRODUCTION