The Study of Continuous Rolling Mill Inter-stand Tension Inferential .If there is no back tension for the first stand, so after the torque of unhindered rolling of the stands has been estimated with one of the possible methods, we can evaluate torque components from tension effect for each stand of the rolling mill. With these values, we can develop the systems for inter-stand tension control while.tension control method for a rolling mill,1 THE MECHANICS OF TENSION CONTROL . - Converter AccessoryIt is impossible to control your web without proper tension being applied to it. The web must be “in traction” with all machine idler rolls and driven rolls to ensure proper web handling and control. • The web handling principal states a web will seek to align itself perpendicular to an idler or driven roll. This web handling.
Designing of Hot Strip Rolling Mill Control SystemStrip tensions are mainly provided between mandrel and pinch roll, between pinch roll and finishing mill. In order to make full use of the motor torque, the tension control system adopts the maximum torque method  . The basic control process is: when the mandrel works under the basic speed, motor is in full magnetic.tension control method for a rolling mill,The Study of Continuous Rolling Mill Inter-stand Tension Inferential .If there is no back tension for the first stand, so after the torque of unhindered rolling of the stands has been estimated with one of the possible methods, we can evaluate torque components from tension effect for each stand of the rolling mill. With these values, we can develop the systems for inter-stand tension control while.John Frank
It analyses the operation of the rolling mill using different system for tension inferential control. . (1977). : М.G. Polykov, I.А. Selivanov, V.А. Tkachenko, Efficiency of Methods for Wire Size Control at Continuous Rolling Mill s with Multi-Roll Gauges, in: Theory and Practice of Metalware Production, UFU, Sverdlovsk. (1985).
Oct 8, 2014 . damaging failure of the mill through looping, where the strip tension falls to zero, or tearing of the strip [4, 5]. Various advanced methods have been developed to ana- lyze and control rolling mills [6–11]. Among the previous investigations, some notes focus on tension control problem in cold rolling mills [12,.
sizing mill whose light reduction rolling spread was made smaller” have been reported. The latter method has had reports of the analy- sis of inﬂuence coefficients of the block mill with regard to the size control technology of the wires-6), of free tension control” in the 2 strand rolling and of the set-up of intermediate mills).
Strip tensions are mainly provided between mandrel and pinch roll, between pinch roll and finishing mill. In order to make full use of the motor torque, the tension control system adopts the maximum torque method  . The basic control process is: when the mandrel works under the basic speed, motor is in full magnetic.
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 learn how to design PID controllers for managing tension in a multistage rolling mill process. You will also see how you can use the linearization.
Abstract. Material tracking is an important part of the automation control system which has a major im- pact on the product quality. This paper addresses a stand load identification in wire rod mill as a new algorithm added to existing control system. Tension control approaches are described and a modification of existing.
simplex method. The process rolling schedule optimization method has been applied successfully to the 5-stand tandem cold mill in Tangent steel. Rolling .. technological control functions such as position control, strip thickness, strip tension force and shape control can be set-up step by step. Those control loops.
At the Mizushima hot strip mill, the tension control system in the finishing mill was . The loopers, looper drives, mill roll . sion during rolling. The vertical force of the looper rolls Ma — M., - M was measured by the torsion bar method, and the strip To = 0 - twº u - Zvi s . . . (5) tension was calculated from the measured values.
In a hot strip rolling mill a velocity damping compensator circuit is added to the current regulating loop of the looper motor drive generating a torque on the looper arm . The invention relates in general to interstand tension control apparatus for a rolling mill, and more particularly to looper control apparatus in a tandem or.
In the past, rolling methods used in rod and bar mills have relied on traditional minimum tension and loop control with adjustment of the roll gaps and mill stand speeds to provide the required product quality. Mini- mum tension control, which depends on torque measurements, bases the stand speed relationship.
Tension, N/mm as a multivariable and optimal control technique can be applied to mass flow control in rolling mills [5, 8]. As it is straightforward to design . and the proposed algorithm is then applied to a typical rolling process in. Section 5. Finally, the concluding remarks are given in section 6. 2. Rolling Mill Behavior.
effectiveness for a hot rolling mill process through comparison examples. . looper-tension control system tension looper roll. M strip looper motor looper main motor. ASR. M. Fig. 1. Tension and looper control in finishing mills: ASR–Automatic Speed .. trol) algorithm (, ), avoids the conservative control of the worst.
Aug 4, 2015 . "Adaptive and Robust Control Method with Estima- tion of Rolling Characteristics for Looper Angle Control at Hot Strip. Mill", ISIJ International, vol. 43, No. 3, 358-365, 2003. Asano, K. et al., "Hot strip mill tension-looper control based on decentralization and coordination", Control Engineering Practice, 8:.
Abstract. This paper deals with the problem of looper control for tension-free rolling. Conventional controllers cannot deal effectively with unmodeled dynamics and large vari- ations which can lead to . The loop control methods are commonly used for flexi- . a 17 stand bar mill in the chapparrel steel mill in Mil- waukee by.
When printing on a roll of material, improper tension control results in smeared ink and . other machine parts wear, the settings will produce different tension levels. . OF WEB TENSION. CONTROL. 5. Best Method: Load cells are used along with controllers and actuators to automatically measure and adjust web tension.
A computer controlled cold metal rolling mill is described wherein force and power curves stored within a calculated set-up model are adapted in response to sensed . Proper tensions are important because excessive tension can cause strip breakage or slippage in the roll bite while insufficient tension can allow the strip to.
disturbance to the tension control system because of the mass flow change caused by roll gap movement. Another disturbance comes from a set-up mismatch at the finishing mills. Before the strip arrives at the finishing mill, a supervisory computer calculates initial set-up values such as the roll gap, rolling force and rolling.
*4 Manager, Design Group 1, Rolling Mill Design Department, Mitsubishi-Hitachi Metals Machinery, Inc. *5 General Manager . of strip shape control accuracy and the attainment of stable rolling. Optical measurement . referred to as LSM)2-4. This device employs a method that separates the tension control roll (looper.
The single stand rolling mill governing equation is a non-linear function on several parameters (input thickness, front and back tensions, yield stress and friction ... a method to determinate the appropriate adjustment for thickness control, considering three possible control parameters: gap, front tension and back tension.