A method to determinate the thickness control parameters in cold . The single stand rolling mill governing equation is a non linear function on several To verify the proposed method a new Automatic Gage Control AGC system for For the control action on the back tension 0 the output thickness was nbsp
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 . Contact
A tension control method for a rolling mill according to claim 1, characterized in that when the looperless tension control method is to be changed-over to the tension control method with the looper, the former is changed-over to the latter via a region in which both said control methods are simultaneously executed.
This is the second webinar of a three-part webinar series that will highlight the use of MathWorks products for modeling and control of a multi-stage rolling mill process. In this particular webinar you will learn how to use MathWorks products to model the looper-strip interaction for tension control.
This paper reports a multistand fuzzy tension control system for a roughing rolling mill. Combined with a novel decoupling strategy [3], the proposed scheme makes it possible to separate interstand interactions and realize intelligent tension-free control of multiple roughing rolling stands. To verify the developed control strategy, a
A tension control method for a rolling mill according to claim 1, characterized in that when the looperless tension control method is to be changed-over to the tension control method with the looper, the former is changed-over to the latter via a region in which both said control methods are simultaneously executed.
The rolling force, rolling torque, incoming workpiece thickness and roll gap at a first rolling stand are detected when a workpiece is fed into the nip between the rolls of the first rolling stand to provide their reference values P.sub.10, G.sub.10, H.sub.10 and S.sub.10 which are stored in a memory, and the reference torque arm l.sub.10 is computed on the basis of the reference …
CONTROL METHOD OF TENSION IN ROLLING MILLS (1) United States Patent 3760621 . Abstract: In a cold tandem mill of the endless type, means are provided to maintain the strip tension constant while the cross-section of the strip undergoes a change in size, that is, as the thickness, the width or the desired finished thickness of the strip is ...
Designing Of Hot Strip Rolling Mill Control System. it automatically switch to the tension control after tension establishing between the last finishing mill and mandrel. tension givenis determined by tension torque, friction torque, bending torque and inertia torque [3]. 3. coiling tension control model 3.1. tension torque t ut w h d 2 f = ( ) (1)
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 ...
B21B1/18 — Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like ...
JP-2002001429-A chemical patent summary.
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. However, it does make the mass flow more stable and hence ...
Figure 7 shows the functional circuit of the drive control system implementing this method, ... O.V. The Study of Continuous Rolling Mill Inter-stand Tension Inferential Control Systems. Procedia Eng. 2015, 129, 231–238. [Google Scholar] Borovsky, T.; Kyslan, K.; Durovsky, F. Material Tracking with Dynamic Torque Adaptation for Tension ...
There is disclosed a method of controlling inter-stand tension in rolling mills in which a tension measuring device is provided on each stand. The tension measuring device comprises a pair of load sensing devices provided respectively at the entry and delivery sides of the roll stand. Difference between outputs from the pair of load sensing devices is used as an output value of …
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 ...
In a tandem rolling mill consisting of at least a first rolling stand and a second rolling stand, the interstand tension is controlled by the steps of detecting the rolling force P 10 and rolling torque G 10 at the first rolling stand after a workpiece is fed into the nip between the rolls of the first rolling stand but before the workpiece is fed into the nip between the rolls of the second ...
From the series: Simulating a Multi-Stage Rolling Mill Process. 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.
CONTROL METHOD OF TENSION IN ROLLING MILLS (1) United States Patent 3760621 . Abstract: In a cold tandem mill of the endless type, means are provided to maintain the strip tension constant while the cross-section of the strip undergoes a change in size, that is, as the thickness, the width or the desired finished thickness of the strip is ...
A system and method for achieving an optimum interstand strip tension providing substantially equal loading of adjacent stands of a tandem rolling mill where such optimum tension is determined by the expression ##EQU1## where A1 and B1 are, respectively, the load ratio intercept and the slope of the load ratio versus interstand tension function for a first mill …
In a method and a system for controlling an interstand tension in a continuous rolling mill having a looper provided between a pair of successive rolling stands and driven by a looper drive motor, a correction to the speed target value for the looper drive motor is determined in accordance with the deviation of a detected looper operating angle from an angle target value, …
Interstand tension control method and apparatus for tandem rolling mill Abstract. The rolling force, rolling torque, incoming workpiece thickness and roll gap at a first rolling stand are detected when a workpiece is fed into the nip between the rolls of the first rolling stand to provide their reference values P.sub.10, G.sub.10, H.sub.10 and ...
From the series: Simulating a Multi-Stage Rolling Mill Process. 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 …
Control of Strip Tension in a Rolling Mill Based on Loopers and Impedance Control. A. Steinboeck, G. Mühlberger, A. Kugi. Engineering. 2014. Abstract A mathematical model of a strip-looper system of a hot strip tandem rolling mill is developed using Hamilton's principle and the Galerkin weighted residual method.
In a tandem rolling mill consisting of at least a first rolling stand and a second rolling stand, the interstand tension is controlled by the steps of detecting the rolling force P 10 and rolling torque G 10 at the first rolling stand after a workpiece is fed into the nip between the rolls of the first rolling stand but before the workpiece is fed into the nip between the rolls of the second ...
An interstand tension control method in a tandem rolling mill, the rolling mill including a plurality of rolling stands, a shear means, disposed upstream of the tandem rolling mill, for cutting leading and trailing ends of a workpiece to be rolled and a detector means for detecting process data to be used for computing an interstand tension ...
A shear is generally disposed upstream of the tandem rolling mill to shear the leading and trailing ends of a workpiece. When the shear is cutting the trailing end of the workpiece, a backward tension is produced between the shear and the first rolling stand of the tandem rolling mill, resulting in abrupt variations of the process data used for ...
Robust Tension Control of Strip for 5Stand Tandem Cold Hindawi. Oct 8 2014 Large transient variations in tension may result in a dramatic and physically 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 analyze and control rolling mills 6–11 Among the previous
hot rolling mills. We thus consider tandem rolling mills equipped with loopers in this paper. Due to their easy setup, PI force controllers are still the most prevalent controllers for the position of looper rolls (Choi et al., 2007b). More advanced control systems use tension meters (Zhao et al., 2008) to measure the current strip tension.
In a tandem rolling mill consisting of at least a first rolling stand and a second rolling stand, the interstand tension is controlled by the steps of detecting the rolling force P.sub.10 and rolling torque G.sub.10 at the first rolling stand after a workpiece is fed into the nip between the rolls of the first rolling stand but before the workpiece is fed into the nip between the rolls of the ...
JP2839814B2 - Tension control method for continuous hot rolling mill - Google Patents Tension control method for continuous hot rolling mill Info Publication number JP2839814B2. JP2839814B2 ... tension looper speed mill control Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. ...