Automatic rolling process is a high-speed system which always requires high-speed control and communication capabilities. Meanwhile, it is also a typical …
Get Quote
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 …
Get Quote
Controlling the rolling of the rolling mill can strengthen and toughen the steel. The essence is to control the metallurgical process (such as austenite in recrystallization, alloying elements and carbon and nitride solid solution and precipitation, phase transformation, work hardening, texture, etc.) of the steel during the whole rolling process by adjusting various rolling process parameters ...
Get Quote
US2275509A - Control for rolling mills - Google Patents Control for rolling mills Download PDF Info Publication number US2275509A ... mill thickness relay strip gage Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to ...
Get Quote
LQG Regulation: Rolling Mill Case Study Overview of this Case Study This case study demonstrates the use of the LQG design tools in a process control application. The goal is to regulate the horizontal and vertical thickness of the beam produced by.
Get Quote
The estimated mechanical centre crown control effect of each rolled strip width with an outboard back-up roll bending (BURB) device for hot steel rolling in a plate mill (work roll diameter is 1,020 mm, back-up roll diameter 1,830 mm, and barrel …
Get Quote
ControlIT for Cold Rolling Mills Technological control for cold rolling processes Rolling of flat metal products is a complex proc-ess where the quality of the product is influenced by various factors like incoming material, me-chanical and electrical equipment, lubrication, control strategies etc. The significant quality parameters are: material
Get Quote
During the hot rolling mill process, many factors are taken into account to ensure the final rolled product meets the desired thickness tolerances and ultimate quality requirements. With the goal of reducing material consumption and manufacturing costs, it's imperative for manufacturers to achieve minimum and nominal thickness tolerances by ...
Get Quote
A rolling mill and associated control system are described, including means for adjusting roll spacing of the mill to keep the exit gage of rolled strip substantially constant as the mill is accelerated to normal operating speed; the adjusting means being operable selectively over a range of mill speeds to cause roll spacing adjustments in relation to subsequent changes in mill speed.
Get Quote
Optimization of a Cold Rolling Mill with a High Speed X-ray Thickness Gauge Christopher Burnett, Thermo Fisher Scientific, Mount Airy, MD, United States White Paper Abstract The high speed production achieved by modern cold rolling mills requires reliable and robust thickness sensors. The Automatic Gauge Control (AGC) systems and hydraulic
Get Quote
Shape control systems supplied by ANDRITZ Sundwig are used in most rolling mill types in the steel, stainless steel, and nonferrous metal industries. Shape control systems are also used in tension levelers for controlling the strip shape.
Get Quote
The overall control structure, which is crucial for stable operation of a tandem rolling mill, is described in Section 2. The mass flow depends on the height, the width, and the velocity of the rolled strip. In the following, the strip width is considered constant because its variations are negligibly small.
Get Quote
Mass flow control additionally addresses problems in the transport lag between the mill bite and the exit thickness measurement and so maintains good control during speed changes. Attention to detail and good practise during aluminium rolling …
Get Quote
[3] Huang, Y. (2008) Designing of Hot Strip Rolling Mill Control System Based on PLC. Electrical Transmission, 38, 56- 59. (In Chinese) [4] Yu, C.Z. (2009) Hot Rolling Coiler Tension Control. Metallurgical Automation, S2, 474-478. (In Chinese)
Get Quote
Latin American Applied Research 36:199-204 (2006) 199 MODELLING AND CONTROL OF A HOT ROLLING MILL F. G. ROSSOMANDO† and J. DENTI FILHO‡ †Coordenadoria da Mecânica, CEFETES, CEP 29040-780 ...
Get Quote
A feedback control system for a gap between rolls in a mill includes a variable inductance with a core on one roll and an armature on the other roll. This inductance, as well as a reference inductance and two auxiliary inductances, are interconnected to establish AC biased bridge. The relative phase of the bridge diagonal voltage is used to control the gap width.
Get Quote
I claim: 1. In a rolling mill looper control system for controlling a looper arm supporting a looper roller adapted to engage a strip of material to be rolled from a first roll stand to a second roll stand, including a direct-current looper motor for applying torque to said looper arm; a speed regulator for adjusting the speed of at least one of said first and second roll stands to provide a ...
Get Quote
Rolling mill controls generally are concerned with effecting a change in the roll setting as a function of a change in the rolling pressure. Prior patents that, at least in part, envision such a control are U. S. Pat. No. 2,726,541 that issued to R. B. Sims on Dec. 13, 1955 and No. 3,496,743 that issued to M. D. Stone on Feb. 24, 1970.
Get Quote
The control scheme for the rolling mill, C fb1 and C fb2 are the two feedback controllers, C ff1 and C ff2 are the two feedforward controllers. According to simulation of the controlled system, a considerable reduction of thickness variation can be achieved by the designed controllers. The …
Get Quote
Rolling Mill Tutorial - Control System Design. Another control problem (besides the continuous caster) arising in the steel industry is the control of the exit steel thickness in a rolling mill. The diagram below shows the layout of a rolling mill, with thick steel going in one side, and thin steel coming out the other. Overview of the Example ...
Get Quote
Hot Rolling Mill. Lower Costs, Reduce Time to Market and Improve Quality. During the hot rolling mill process, many factors are taken into account to ensure the final rolled product meets the desired thickness tolerances and ultimate quality requirements.
Get Quote
Keywords: rolling mill, multi-stand mill, thickness con-trol, tension control, flying gauge change, non-linear control, flatness based control. Abstract A multi-stand rolling mill is a highly complex coupled non-linear system. If the operating point is changing in a wider range the non-linearities can no longer be neglected in the controller ...
Get Quote
As a result, higher performance is being demanded of the rolling mills. To meet this need, a continuous 5-stand tandem mill directly connected to the pickling line and using 6Hi UCM-Mill (Universal Crown Control mills) for all stands has become the standard. The …
Get Quote
Rolling Process: Definition, Working, Application, Defects, Type of Rolling Mills [PDF] Written by Saswata Baksi in Manufacturing Process. Rolling is the deformation process of a metal that is widely used in the metal forming process. It is done by passing the strip …
Get Quote