tension control method for a rolling mill
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tension control method for a rolling mill - Know More
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 ....
Analysis of Startup Process and Its Optimization for a Two , - Know More
Dynamic characteristic analysis of a two-stand reversible cold rolling mill in the startup process was carried out The delay algorithm of the interstand thickness was proposed A new method combined with the accelerated secant and the tangent methods was established to solve the simultaneous equations The thickness and interstand tension transition processes with different static tension ....
Control of Strip Tension in a Rolling Mill Based on , - Know More
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...
Everything you need to know about flatteners and levelers , - Know More
Tension Leveling Tension leveling is an effective tension-assisted leveling method The coil is put under significant tension between pull and drag bridles placed before and after the specially designed roller leveling device see Figure 8 With tension leveling, all parts of the metal are pulled past the yield point, top to bottom, edge to edge...
Modeling and Control of Multi Stage Rolling Mill Process , - Know More
Sheet Rolling Mill processes involve progressive thickness reduction of continuous sheet metal in multiple stag 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...
FEATURING ROLLING AND PROCESSING - Know More
Referred to as ultra-thin rolling control, the system is essentially an adapted control concept that has been successfully applied many times in tandem cold mills When rolling below a certain strip thickness, the control mode is switched from speed control to roll-gap control while the strip tension is ,...
A BASIC UNDERSTANDING OF THE MECHANICS OF , - Know More
As regards abnormal rolling conditions - which are more or less very normal for rolling mills - roll damage often occurs with consequences for the mill and the rolled product Evidently the reasons of roll...
FUZZY TENSION CONTROL OF THE WIRE ROD ROUGHING , - Know More
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, as Strážske The given roughing mill consists of six rolling stands STD , individually driven by motors ....
Rolling metalworking - Know More
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 billets...
FUZZY TENSION CONTROL SCHEME FOR ROUGHING AND , - Know More
This paper proposes a fuzzy interstand tension control scheme for roughing and intermediate rolling mills to deal with the first problem mentioned above The proposed scheme detects the changes in the motor current and corrects the motor speed of the upstream stand based on approximate human reasoning to remove speed mismatch...
Looperless Tension Control in Hot Rolling Process Using SVR - Know More
Constant tension control between stands in hot rolling process is essential to enhance the quality of steel Sensorless tension control is under research by some advanced companies to replace the conventional tension control method because in continuous finishing mill process, it is impossible to install the looper used in conventional control...
Rolling mill speed calculation formula pdf - Know More
rolling mill speed calculation formula pdf Empirical Sealed clean bearings for rolling mill roll neck Todays demands on productivity and quality in hot rolling mills for rod and wire require The Rolling simulation program for calculating the empty gap unloaded stand Speed calculation is a function of finishing speed, area of the bar....
A New Tension Control Method for Hot Strip Finishing Mill , - Know More
NKK has developed a new tension control method for the hot strip finishing mill, and applied it to Keihin Works The behavior of the interstand tension by the looper control was evaluated by simulation and it was concluded that the mass moment of looper inertia should be reduced drastically...
1 Hot rolling and rolling defects 11 Front and back , - Know More
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 18 Rolling defects Mill spring is a defect in which the rolled sheet is thicker than the required thickness because....
Rolling Mill History - Know More
Tags Rolling Mills, Slitting Lines Rolling Mill History Hot and cold metalworking between two or more rolls has been in existence since long before the industrial revolution As a matter of fact, Leonardo da Vinci was credited for the metalworking mill prior to his death in 1519...
Simulating a Multi - Know More
Dec 17, 2009 0183 32 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 ....
REVERSING COLD MILL - Know More
REVERSING COLD MILL Advanced reversing cold-mill technology from Primetals Technologies is an ideal solution for small- to medium-sized production capacities, or for the rolling of smaller order lots of special steel grad...
Rolling mill looper control system - Know More
Dec 29, 1981 0183 32 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 continuous hot strip rolling mill The looper is a mechanism installed between any two stands, in a tandem mill installation...
Advanced Control for Hot Rolling Mills SpringerLink - Know More
Anbe Y, K Sekiguchi and H Imanari, Tension Control of a Hot Strip Mill Finisher , IFAC 13th , M Saito, T Kataoka, H Sasao and K Yabuuchi, A New Tension Control Method for Hot Strip Finishing Mill , IFAC 10th , Hearns G 1999 Advanced Control for Hot Rolling Mills In Frank PM eds Advances in Control Springer, London ....
Automatic Tension Control in the Continuous , - Know More
Oct 24, 2017 0183 32 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 ,...
Rolling presentation - Know More
Nov 09, 2016 0183 32 5 Cluster mill 6 Planetary mill 7 Four stand continuous mill 6 6 The initial breakdown of ingots into blooms billets is generally done by hot-rolling And then cold-rolling is to be done to get good surface finish and close control over dimension HOT ROLLING - occurs above the recrystallization temperature of the material 7...
Tension Measuring Method and the Effect of Tension Control , - Know More
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...
Minimum Tension in a Merchant Bar Rolling Mill using , - Know More
The problem of achieving minimum bar tension in a merchant bar rolling mill without direct tension measurement is considered A non-linear state-space process model which represents the mill dynamics has been developed, and a control scheme is proposed which incorporates an Extended Kalman Filter for estimation of bar tension, and optimal state feedback to provide appropriate control action...
Study 17 Terms CH 13 Flashcards Quizlet - Know More
Front tensions are applied and controlled by the take-up reel of a rolling mill see Fig 1311 on page 326 The greater the torque to this reel, the greater the front tension Back tension is applied by the pay-off reel of the rolling mill, whereby increasing the brake force on the pay-off reel increases the back tension...
Basics of Web Tension Control Summary - Know More
different methods of control be it either speed or torque Lastly we will explore the different types of tension systems including manual, open loop and closed loop We will discuss different components and methods used in each, as well as the advantages and disadvantag This section is intended to help the audience best select the system best...
Gauge and tension control system for tandem rolling mill , - Know More
Oct 06, 1981 0183 32 A gauge and tension control system for a tandem mill comprises a delivered strip thickness deviation calculating unit for detecting output strip thickness at each of rolling stands, a tension calculating unit for arithmetically determining interstand tensions between two adjacent rolling stands on the basis of armature currents of drive motors and rolling loads at every rolling stand, a ,...
Rolling Mill Control - Know More
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...
Understanding Rolling Process in Long Product Rolling Mill , - Know More
Nov 27, 2015 0183 32 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...
tension control method for a rolling mill - Know More
2007-10-18 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 Read More Designing Of Hot Strip Rolling Mill Control ....
Looper and tension control in hot rolling mills A survey , - Know More
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 stripThe high strip tension between stands induces width shrinkage, thickness reduction and moreover can produce an edge wave on a strip...