# Tension calculation in rolling mill

**5. Foreword Calculation of Rolling Work and Drive Power from Energy and Power Consumption Diagrams 4. A SURVEY OF THE LOOPER-TENSION CONTROL TECHNOLOGY IN HOT ROLLING MILLS pairings such that the rotating speed of a mill motor controls strip tension while angular velocity of a looper motor controls looper angle. CRM Complex6 High Reversible Cold Rolling Mill Training Manual0 6 HIGH REVERSIBLE MILL 7. Concerning the notation, let us arrange that an up-manufacturer of mandrels, tension reel,payoff reel for coil processing equipments,like rolling mill,galvanizing line,pickling line, color coating line,etc;Analysis of Small Spalling Mechanism on Hot Rolling Mill Roll Surface by Akio SONODA*, Shigeru HAMADA** Analysis of Small Spalling Mechanism on Hot Rolling Roll Surface 3 2. M. V. The main identified values are friction and steel hardening. Smeulders (top row, left) terms of calculation of coefficient of friction, and monitoring strip and for steel cold rolling: main motor/ tension reel power: 400/200 kW, …Accumulating strip before the mill An introduction to entry end equipment. Effect of rolling speed on the relationship. 2 • Manual systems » Closed loop Use a rolling diaphragm type cylinder •Bellafram •Illinois Pneumatic •Control Air Quick relieving DFP Loading Dancers Air In. BISEN (1) (2), As per the theoretical calculation and motor characteristics of 3 phase induction motor, rotational speed of said rolling mill main electric motor; A tension …Jul 25, 2007 · Cold Rolling: training video from the Corus BCSA training pack. researchgate. Singh/ Dr. = Projected length of arc of contact. The tension transfer phenomena is used in the design of the suggested controller. ◦ Minimum rollable thickness by Stone (1953) where D is the roll diameter in mm E is the elastic modulus in Pa, is the average flow strength in Pa and is the coefficient of friction. Hot rolling and rolling defects: 1. The reference list covers Φ114, Φ159 and Φ273 line. MATHEMATICAL MODELING OF THE TENSION Tension control is applied at finish rolling process of rolling process. Before starting operation, rolling mills require settings, including q roll gap settings, w entry and delivery tension However, it is not easy to calculate tension torque based on the measured current precise thickness control, rolls the strip from roughing mill process until it The inter-stand tension inferential control systems are used to stabilize the rolling motor torque. This paper presents a new control method based on decentralization and coordination. 414-419, 2015. 3. Effect of Strip Cold Rolling CSI’s cold reduction mill is a series of five rolling mills, or ‘stands’; hence the name “5-Stand”. + Rolling mill automation with model-based process optimization. The total rolling load is distributed over the arc of contact. A looper table can be used to aid in keeping the bar tension free between stands. sk/web/sites/subory/intranet/dokumentacia_konferencii/ifac2014/media/Control of Strip Tension in a Rolling Mill Based on Loopers and Impedance Control Some tandem rolling mills operate with an endless strip (cf. 3 Flow of tension feed back calculation. A new tension control strategy in a multi-stand rolling process is suggested. Rolling Mill Rolls. The frame of the tension adjusting system is given. The developed mathematical model is used to design a controller for the real-time control system. 1946 Iron and Steel Inst. The Study of Continuous Rolling Mill Inter-stand Tension Inferential Control Systems The inter-stand tension inferential control systems are used to stabilize the rolling motor torque 1. & Bridles. Mill setup was entrusted to the skills of experienced operators who made careful manual adjustments on …A rolling mill made of a sequence of rolling stands yielding the desired final steel bar section as the bar moves through the mill HiTension and HiSection are products of Danieli Automation S. Despite the synchronized mill speeds, the actual strip length l …Test results. In this mill, two opposing rolls are used. M. 6 High Reversible Cold Rolling Mill 1. Effect of back and front tension. 69, “The Sheffield Experimental Cold Rolling Mill”. sut. 2. tension meters (Zhao et al. Where tensions are apDocuments Similar To Tension Calculation & Formulae for Accu. Takano et al. T = Tension at outlet section of the mill. The fundamental concept of these lines consist of simultaneously stretching the Modernization of a Tandem Cold Rolling Mill at Arcelor Eisenhüttenstadt Modernization at the bending systems, thickness, tension and flatness, the rolling mill received a new basic automation for the open- and closed-loop con-trol of the main drives. 1 were fitted to Hill's formula for rolling. 5 - 1. However, in the hot rolling mill roll, there is a case which a crack initiates by thermal cycling on the roll surface, and this crack grows by mechanical loading3),4). We plan to help you meet your needs with our equipment, with our distribution and product support system, and the continual introduction and updating of products. The improvement in the quality of the final output depends on the control strategy of centerline thickness and interstand tension. 12. 75% chromium and 0. Coiler tension control principle diagram is shown in The rolling mill cylinders work in hot conditions, with complex variable stress, due to lamination process, repeated at regular time periods. roll-kraft. P. which is the main factor that affected the accuracy of coiling diameter calculation. Figure:142 : In the two high reversing mill the direction of spin of the rolls can be 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. Google Scholar, SAGE Journals: Ford, H. However, this leads to complicated controllers, which are hard to tune on site. adopted a 4-high rolling mill for aluminum alloys and 2. Ďurovský et al. i have a winder application in rolling mill. 12. Aimed at the complex demand of hot strip rolling mill in practicing, the configuration of the coiler and the technological process is analyzed. Depending on specification and design, our cold rolling mills show the following features: Highly dynamic screw-down systems; Coiler drums are designed for high tension; Optimized mill stand design – also with regard to coil diameters – to Selection of Work Roll Diameter for Cold Rolling Mill* By Hajime WA TANABE, * * Hisashi HONJO * * and Kiyoto MI YASAKA* * Synopsis The work roll diameter is a very important factor which influences the strip tension. 25. As loop sensor for flat products the LMS 6035S is used. Tapered roller bearings are separable; unlike cylindrical roller bearings, however, it is not possible to fit the inner rings on the neck first, mount the outer rings in the chock and then slide the chock onto the roll neck. 7. com/doc/46326865/Tension-Calculation-Formulae-for-Accu-BridlesAccumulator Torque and tension calculations. , "A neuro-fuzzy system for looper tension control in rolling mills", Control Engineering Practice, 13, 1-13, 2005. Roll deformation of 4-high rolling mill the calculation process involv es one half of a roll system. LAP Croptimizer Dimension-measurement and Crop Shears optimizing calculation, the specified finished plate’s dimensions plus in the rolling mill. Cited by: 1Publish Year: 2013Author: Jin Lan Bai, Jun Sheng WangTension Calculation & Formulae for Accu. Tension Leveling is the optimum process when flatness is the targeted parameter to be improved. manufacturer of mandrels, tension reel,payoff reel for coil processing equipments,like rolling mill,galvanizing line,pickling line, color coating line,etc;CVC rolls as a flatness actuator in a cold rolling mill Design och funktion av CVC-valsar som Design and function of CVC rolls as a flatness actuator in a cold rolling mill Keywords Flatness, actuators, CVC, cluster mill, cold rolling, strip With known tension along the strip and the angle on which the strip encloses the roll, the Tension levelling lines Return Tension levellin consists of subjecting the strip of sheet metal to a traction force sufficient to exceed the yield stress of the fibres making up the material, combining this lengthening with simultaneous deformation of the strip caused by intermeshing of the levelling rolls. 1. Other Methods of Calculation of Roll Torque 4. This tri-. Enabling Sensing Technologies • Key to bar/billet tension control is …Rolling Mill Control. Fig. Functional dependencies and chart of the mathematical model defining interrelation between the specific …rolling mill process in order to maximize throughput and minimize cost and crop losses. Accurate prediction of roll force for grooved rolling is considerably more difficult than predicting the geometry of the rolling stock. DELIVERY TENSION REEL 8. Here, required rolling tension is set at 60 kN on assumption that taper tension is to be employed at a pass in one portion. 756, pp. Charles, Illinois. 3 Example of sheet thickness at single-stand cold rolling mill (simulating test rolling)Working from mill drawings and a thorough understanding of each application KELK application specialists will determine the best tension measurement solution and prepare a detailed installation drawing - free of charge - for the customer to consider. ROLL CHANGING CAR (RCC) 6 8. Cited by: 1Publish Year: 2015Author: V. The coiler control system hardware is designed. 1 Front and back tensions: We have seen that the rolling load is dependent on roll diameter, higher the roll dia, higher the roll force. F. Y. This type of model is often called torque-force model. net/publication/245523258_The_Calculation_of_Roll_Force_andThe Calculation of Roll Force and Torque in Cold Strip Rolling with Tensions. The program is a detailed treatment of mill automation system design and practical, real-world implementation issues. Each mill stand has The 5-stand is operated at very high strip tension, approaching what could stretch or tear the steel, in order to1. Designing of Hot Strip Rolling Mill Control System Tension Leveling and Skin Passing in a Galvanizing Line T. 1: Rolling mills Planetary mill has a pair of large 144, “The Calculation of Roll Force and Torque in Cold Strip Rolling with Tensions”. 2015. anuncoiler and windup reels are used. The zenith product line, consisting of more than 30 machines, sets the standard for our industry. com. eitvas. From an approximate theory, equations are derived for roll force and torque with and without front and back tensions applied to the strip. Coiler tension control principle diagram is shown in Figure 3. where k m: Two dimensional deformation A new tension control strategy in a multi-stand rolling process is suggested. fei. + Process of wide range of thicknesses. He applied computational Intelligence based optimization for the first time to the rolling schedule of tandem cold rolling mill. Using Calculation Block xf l 1 I cref t ref ref h b ref q Fig. The arithmetic of coiling tension and the control process is introduced. The model computes friction coefficient, steel hardening, roll force and torque according to real data measured on the mill. Understanding Dancer Tension Control Systems. In general, the lamination cylinders are calculated taking into account only the static forces action (constant in time), condition only partial satisfactory in operation. INTRODUCTION THE FUNDAMENTALS OF WEB TENSION CONTROL 1 HOW TO SIZE AND SELECT LOAD CELLS FOR WEB PROCESS PRODUCTIVITY INTRODUCTION Tension control still relies on operator intervention, which takes time to correct. Rolling Mill. Suppose the angular velocity of the wheel is [omega]. the cluster mill, and the tandem rolling mill. The rolling mills have the backup rolls (BUR), intermediate rolls (IMR) and work rolls (WR) of the same size and the same materials. Rolling Motion. As a result, much wasted product is still produced. 2. This tri-A Flatness Based Approach for the Thickness Control in Rolling Mills Keywords: rolling mill, multi-stand mill, thickness con-trol, tension control, ﬂying gauge change, non-linear control, or indirectly by calculation on the basis of other measured quantities. Jiang Edge contact of work rolls and Slit beam deflection mode for a 4-high rolling mill 2. CVC rolls as a flatness actuator in a cold rolling mill Design och funktion av CVC-valsar som Design and function of CVC rolls as a flatness actuator in a cold rolling mill Keywords Flatness, actuators, CVC, cluster mill, cold rolling, strip With known tension along the strip and the angle on which the strip encloses the roll, the TelePro periodicallly offers a rolling mill automation technology training program at its offices in St. A. Coiler tension control principle diagram is shown in Analysis of Small Spalling Mechanism on Hot Rolling Mill Roll Surface by Akio SONODA*, Shigeru HAMADA** Analysis of Small Spalling Mechanism on Hot Rolling Roll Surface 3 2. • Rolling –reducing the thickness or changing the cross- section of a long workpiece by compressive forces applied through a set of rolls • Developed in late 1500s • Accounts for 90% of all metals produced by metal working processes • Often carried out at elevated temperatures first (hot rolling) to change coarse-grained, brittle, and porous ingot Rolling mill speed calculation formula pdf Understanding of load calculation in rolling processes. 4. The inside wrap of the accumulated coil is pulled to the center takeout arbor by the mill. scribd. s) The of the calculation We provide comprehensive engineering solutions for various applications in Steel ( and Other Metals ) Hot & Cold Rolling Mills and associated applications in the Steel and Metals Industries. Torque =. The fundamental concept of these lines consist of simultaneously stretching the Feb 25, 2016 · Calculation of roll force is important because calculation of torque and power in a rolling mill is based on calculation of roll force. Cold mills for steel, copper and its alloys and other metals strip tension and rolling speed. The calculation of these parameters, with a high degree of Outline of reversing cold rolling mill and rolling method As illustrated in Figure 1, a reversing cold rolling mill is structured mainly of a mill proper, a winding machine (pay-off ree l), an entry winding machine (tension reel) and a delivery-winding machine (tension reel). BELT WRAPPER 9. Each mill stand has The 5-stand is operated at very high strip tension, approaching what could stretch or tear the steel, in order toAimed at the complex demand of hot strip rolling mill in practicing, the configuration of the coiler and the technological process is analyzed. Setting calculation. stuba. Finishing mill which consists of 6 or 7 stands forMILL CONTROL SYSTEM AND METHOD FOR CONTROL OF METAL STRIP ROLLING 8-4-2015 Marwan Simaan University of Central Florida John Pittner Janabi-Sharifi, F. 6. Peer-review under responsibility of the organizing committee of the International Conference on Industrial Engineering (ICIE-2015) doi: 10. The paper studies issues of the cross impact of tension and strip gauge at the rolling in the continuous roughing sub-train of the wide strip hot-rolling mill. th In order to improve the calculation accuracy of tension distribution, a new method to calculate tension distribution for strip cold rolling is carried out. 10 1 - Clutch and cable Magnetic Particle 2 - Pneumatic cylinder and regulatorAimed at the complex demand of hot strip rolling mill in practicing, the configuration of the coiler and the technological process is analyzed. 1. Y xb. Calculation of roll force is important because calculation of torque and power in a rolling mill is based on calculation of roll force. , 2008) to measure the current strip tension. 02 Reheating Furnace Basics. Permyakova[PDF]Control of Strip Tension in a Rolling Mill Based on uamt. 1 Introduction Chatter phenomenon in cold rolling is a particular type of self-excited vibration as a result of the interactions between the rolling process and mechanical dynamics of the mill stand. Rolling - Introductory concepts: 1. A block diagram of CRCCThe rolling mill cylinders work in hot conditions, with complex variable stress, due to lamination process, repeated at regular time periods. 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 ). Sutcliffe and P. B. The system consists of high performance strain gage load cells constructed to rolling mill Width of plate w is large without front and back tension p pin the mill, and tension between the mill and each reel is established. Mechanics of Cold Rolling of Thin Strip Z. Table of Contents. Bland, Ford and Ellis's Method of Calculation of Roll Torque with Applied Tension 4. Uploaded by. 1: Rolling mills Planetary mill has a pair of large iii Contributors Supervising Editor Kyosuke Otoshi Director Chain Products Division Editor Makoto Kanehira Manager Chain Products Division Production Engineering Tension leveling is an effective tension-assisted leveling method. Tandem rolling mill with ve mill stands. Learn more at www. Improvement of Accuracy for Gauge and Elongation Control by Dynamic Process Control Simulator Toshiaki UENO*1 Kenji SORAO*2 sides of the mill. Where tensions are apWhere tensions are applied the calculations for each pass take about an hour; of Cold Rolling Mill for Regulation of Thickness and Rolling Tension Using First, exit unit tension calculation model is developed by using variational rolls and tension distribution of a single-stand reversing cold mill are calculated with However, it is not easy to calculate tension torque based on the measured current precise thickness control, rolls the strip from roughing mill process until it hi ,this is satya. where k m: Two dimensional deformation calculation). II: To find out the Kw requirement for a Bridles: T1 T T2 The above shows that a geometrical progression and therefore the tension progression will be as follows say T1 = 500 kgs T2 = 1500 Kgs Ration between T2 …5/5(4)The Calculation of Roll Force and Torque in Cold Strip https://www. The basic type of rolling mill is two high rolling mill. SOFT STARTING ARRANGEMENTS AVAILABLES FOR HOT ROLLING MILLS FOR ENERGY CONSERVATION A. ROLLING, TORQUE AND ANGULAR MOMENTUM. & Bridles https://www. Author: CorusBCSATrainingViews: 209K[PDF]COMPARISON OF ROLL DEFORMATION IN 4HI ROLLING …www. Tandem Rolling. It is a good practice to apply those results during the selection and calculation of the inferential tension Calculate roll separation force (“rolling force”) and torque rolling mill. proeng. , and Redex rolling mill and roller-leveler while first imposing on it very high tension. POWER IN ROLLING Power is applied to the rolling mill by applying Torque to the rolls and by using roll strip tension. 58 for a, but it is 1. 500" (12. CALCULATION OF THE THERMAL Analysis of Small Spalling Mechanism on Hot Rolling Mill Roll Surface by Akio SONODA*, Shigeru HAMADA** Analysis of Small Spalling Mechanism on Hot Rolling Roll Surface 3 2. Jul 25, 2007 · Cold Rolling: training video from the Corus BCSA training pack. Single-stand and tandem mill applications in both hot and cold rolling …rolling mill process in order to maximize throughput and minimize cost and crop losses. 3 Example of sheet thickness at single-stand cold rolling mill (simulating test rolling)Laser Systems for Automation and Quality Control in Steel Mills. i have a dia sensor(0-10v) which aluminum rolling mills. + Automatic spool handling & transfer system. Hot Rolling kinetic model, tube extracting model, mechanical adjustment calculation and roll gap setup model. This tension may be applied to the front, (front tension), the back, (back tension), or both sides. Many solutions of the von Karman equation were proposed and applied to particular rolling mills due to particular assumptions, such as Alexandra-Ford's formula [8] for plate and hot mills, Sim's equation for hot mills [9], B&F solution for cold mills [10],Introduction On the modern bar and wire mills inter-stand tension is controlled at rolling [1, 2]. However, the total rolling load can be assumed to be concentrated at point along the arc of contact ata distance ‘a’ from the line of centers of the rolls. Computation of Rolling Stand Parameters by Genetic Algorithm – 60 – setting too. In Table 1Aimed at the complex demand of hot strip rolling mill in practicing, the configuration of the coiler and the technological process is analyzed. 10 1 - Clutch and cable Magnetic Particle 2 - Pneumatic cylinder and regulatorFUZZY TENSION CONTROL SCHEME FOR ROUGHING AND INTERMEDIATE ROLLING MILLS GUOMIN LI1 Department of Mechanical, The calculation of the scheduled speed is mainly based on To evaluate on the virtual rolling mill the proposed fuzzy tension control, a speedadopted a 4-high rolling mill for aluminum alloys and 2. Sample calculation for 20High MillTelePro periodicallly offers a rolling mill automation technology training program at its offices in St. LIMITATIONS OF FLAT ROLLING. On the small end of the spectrum, 4Hi rolling mills with work rolls are offered as small as . Width of plate w is large . 3 Example of sheet thickness at single-stand cold rolling mill (simulating test rolling)Sometimes in metal rolling practice, tension, (force), is applied to a work piece as it is being rolled. Several rolling mills arranged in succession so as to increase productivity is called rolling stand. , 1997), which implies that the semi- for subsequent calculations. 5% nickel. Each stand is equal to the output speed of preceding stand. how i calculate torque and tension using diameter. rolling tension in each caliper of the reducer. ac. iaeme. Study of the Effect of the Rolling Mill Inter-Stand Tension on the Strip Gauge Deviation "Study of the Effect of the Rolling Mill Inter-Stand Tension on the Strip Gauge Deviation", Applied Mechanics and Materials, Vol. ProductFriction and Surface Microstructure in Steel Cold Rolling Investigated in Pilot Mill Trials Authors J. Accurate prediction of roll force for grooved rolling is Understanding Dancer Tension Control Systems. The dependence of the calculation of rolling torque on features of high deformation zone is Tension levelling lines Return Tension levellin consists of subjecting the strip of sheet metal to a traction force sufficient to exceed the yield stress of the fibres making up the material, combining this lengthening with simultaneous deformation of the strip caused by intermeshing of the levelling rolls. Colton. hengzhong heavy main products include aluminum cast rolling mill,cold rolling mill,aluminum foil rolling machine,tension leveling line,cut to length line,aluminum rolling machine,slitter,cast roll,roller sleeve,casting mill roll shell,aluminum sheet,aluminum coil,aluminum casting mill,aluminum plate,aluminum circle,aluminum casting rolling machine,Color Aluminum Reflective sheet in product …Four-row and double row tapered roller bearings are used in rolling mills, Figure 11. These components are positioned symmetrically to the Y = 0 plane and to the Z 0 plane. The Hot Rolling Process The roughing mill is made up of six independent rolling mill stands, the last four of which incorporate small fragile as it is rolled and tension between the finishing mill stands must be closely controlled at very low levels in orderrolling mill calculation pdf – Grinding Mill China. tension as this control approach facilitates a systematic 1 THE MECHANICS OF TENSION CONTROL By Jeff Damour CONVERTER ACCESSORY COPORATION Wind Gap, PA USA Introduction This presentation is a basic tutorial in the mechanics of web tension control. Choi et al. Designing of Hot Strip Rolling Mill Control System. 0 time . , Special Report No. The roll surface becomes rough due to the crack growth and small spalling, which cause an increase in the roll regrinding thickness. In the beginning of rolling mill time there were no load cells. J. 1 Introduction devices, hydraulic systems etc. Tension Calculation & Formulae for Accu & Bridles -, Tension Calculation & Formulae for Accu & Bridles, tension For a simple cross check of the calculation the following formula can be used HP, Rolling Mill RollsRolling - Introductory concepts: 1. A typical analysis is 1% carbon, 1. CALCULATION OF THE THERMAL calculation). In order to reduce the roll force, we can reduce roll diameter, or reducing the friction. FENN Rolling mill machines are available in both 2Hi and 4Hi roll configurations, and mills may be either work roll driven, back-up roll driven, or a combination of both. 3 Calculation of rolling loads Some rolled material is rolled from thickness h 1 the rolling load per unit width q S is given as follows. Oct 06, 1981 · 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 …Force Measurement in flat rolling mills and process lines based on Pressductor technology: § Roll Force § Strip Tension Benefits § No influence from harsh environment § Excellent to impact loads § Superior long-time stability § Minimum of maintenance § Lowest cost of ownership Rolling Mill Products Millmate Roll Force - Millmate Strip the rolling mill set up with the operators’ skill on a step by step basis by observing flatness and sheet walking, however, in the mixed roll- Fig. in these mills may be as small as 6 mm diameter – made of tungsten carbide. Get a Price The Calculation of Roll Force and Torque in Hot Rolling MillsKeywords: roll gap, friction gradient, mill chatter, rolling speed, stability, tension variation. After that, rolling of the first pass is started. Tandem cold rolling process is a nonlinear complex system with external and internal uncertainties and significant disturbances. Full systems engineering applications are included with all TWS sys-tems. First, exit unit tension calculation model is developed by using variational calculus method. intechopen. 34, Section 3, p. Sendzimir, Inc. Documents Similar To Tension Calculation & Formulae for Accu. Rolling of Metals the strip during rolling –back tension on the pay-off reel or (Sendzimir) mill. Rolling schedule is a set of multiple rolling parameters such as reduction, roll force, torque, rolling speed and tension. Micro-Tension Reducing Mill Three-roll micro-tension reducing mill developed by CISDI features leading equipment performance and electrical control in China. When Hill’s formula expanded by Misaka for rolling with tension (1) is used, q S is given as follows. 1016/j. Shokhin, O. rolling mill rolling forces tribology mathematical modeling of rolling temperature effects on rolling recrystallization roll torque roll power influence of physical quantities other types of rolling –temper, acumulative, flexible results and future comparison computational simulation conclusions Rolling of Metals IME240/340. No matter if you have one strand or two we have the solution for controlling your mill. CALCULATION OF THE THERMAL Rolling Mill. Similarly, smaller reductions requires lower roll force. (2007a) advocate the use of lin-ear model predictive control (MPC) for loopers and strip Strip Mill stand Looper Fig. - stretch reducing mill, hot reducing tubes, energy, drive motor . 1 Functions of online profile prediction model Fig. Figure 12. Rayner [1] performed 2. This parameter, directly related to rolling fundamentals, simplifies the setup and operator control. 7mm) in diameter. schedule1) and preset calculation 1 Interaction of data and functions in the rolling-mill process Roll-data Reduction practices Adaption Roll gap model Mill model Tension practices Model parameters Set-up values Adaption parameters Measured values Thickness, tension, speed Roll force, torque, temperature CVC, HS, position bending Coil-data the main factor that affected the accuracy of coiling diameter calculation. including aligning ability depend on the rolling speed. The pass scheduling and set-point calculation for all rolling phases will be initiated Feb 25, 2016 · Calculation of roll force is important because calculation of torque and power in a rolling mill is based on calculation of roll force. Under the tension conditions established by the Fig. Required numbers of welding points for each combination of strip thicknesses, which were summarized on the basis of test results, are illustrated in Figure 3. Single-stand and tandem mill applications in both hot and cold rolling …Tension levelling lines Return Tension levellin consists of subjecting the strip of sheet metal to a traction force sufficient to exceed the yield stress of the fibres making up the material, combining this lengthening with simultaneous deformation of the strip caused by intermeshing of the levelling rolls. The tension becomes lost when the hot coil is taken out from the payoff reel, so New Rolling Method Of Reversing Cold Rolling Mill 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 …Roll Force Before. Claimed that in reality this does not exits. The corresponding linear velocity of any point on the rim of the wheel is given byModeling, Simulation and Identification for Control of Tandem Cold Metal Rolling model for 5-tandem cold metal rolling mill in state-space representation is proposed, where the output vector contains Modeling, Simulation and Identification for Control of Tandem Cold Metal Rolling…The hot rolling mill of the Fukui Works went into service in May, 1983 as a world-class facility, equipped with large achieve high-precision rolling control, including tension Figure 2 Configuration of computer control system for hot strip rolling mill Roll thermal crown calculation Finisher set-up calculation/learning ABS: Absolute AGCLaser Systems for Automation and Quality Control in Steel Mills. It analyses the operation of the rolling mill using different system for tension inferential during the selection and calculation of the inferential tension controllers. Google ScholarThe rolling mill cylinders work in hot conditions, with complex variable stress, due to lamination process, repeated at regular time periods. Accurate prediction of roll force for grooved rolling is FUZZY TENSION CONTROL SCHEME FOR ROUGHING AND INTERMEDIATE ROLLING MILLS GUOMIN LI1 Department of Mechanical, The calculation of the scheduled speed is mainly based on To evaluate on the virtual rolling mill the proposed fuzzy tension control, a speedRequired Energy Calculation by Hot Rolling of Tubes and of the Main Drive Motors Power for a Stretch Reducing Mill . Since tension and looper control is the key to successful operations in the hot strip finishing mill, several multivariable controllers have been applied. However, the total rolling load can be assumed to be concentrated at point along the arc of …In the range 50 - 55° they are used for large back-up rolls, around 80° for small back-up rolls in cold rolling, and 90 - 100° (fully hardened) for work rolls in cold rolling. V Study on Tension Distribution Calculation Method for Strip Cold Rolling Automation Study on Tension Distribution Calculation in a six-high cold rolling mill eng. Designing of Control System Control system adopts three layers of network structure, as shown in 4. 2 Discussion of the small spalling using a general tension compression fatigue …Modeling, Simulation and Identification for Control of Tandem Cold Metal Rolling model for 5-tandem cold metal rolling mill in state-space representation is proposed, where the output vector contains Modeling, Simulation and Identification for Control of Tandem Cold Metal Rolling…A new tension control strategy in a multi-stand rolling process is suggested. 1, one half of the roll barrel and the strip are divided into www. PAY OFF REEL SNUBBER ROLL MENDREL 7 …This book is a valuable resource for rolling mill engineers. Where tensions are applied the calculations for each pass take about an hour; of Cold Rolling Mill for Regulation of Thickness and Rolling Tension Using First, exit unit tension calculation model is developed by using variational rolls and tension distribution of a single-stand reversing cold mill are calculated with aluminum rolling mills. p. In such arrangement, anuncoiler and windup reels are used. 038 ScienceDirect International Conference on Industrial Engineering The study of continuous rolling mill inter-stand tension inferential control systems Shokhin V. . Tension Calculation F. The dependability and the accuracy of the TWS Tensiometer is a requirement in the heavy applications and harsh environment of the rolling mills. Given in Fig. It is shown that cold rolling process can be described by a nominal model perturbed by an additive uncertainty. The range of our expertise includes the successful commissioning of the following : • 2-HI Skin Pass Mill • 4-HI Cold Rolling Mill • 6-HI Cold Cold-Rolled Steel Sheets and Coils are extensively used as basic materials in automobiles, electrical appliances, steel office equipment, various types of Hot Rolling Mill Continuous Annealing Line When tension test and elongation values are guaranteed for SPCC in compliance with a customer’s request, the suffix T Oct 06, 1981 · 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 …Oct 18, 2010 · In this segment, Roll-Kraft's Matt Hozjan covers setting the preload for taper roller bearings on a tube, pipe or roll forming mill. 4 Calculation of roll load from the output voltage Specifications of the mill …Since tension and looper control is the key to successful operations in the hot strip finishing mill, several multivariable controllers have been applied. com/MasterAdmin/UploadFolder/IJDMT_07_01_002/IJDMT_07_01The Rolling mill roll deformation is a serious problem and directly impact 1. 2 Discussion of the small spalling using a general tension compression fatigue …the rolling mill set up with the operators’ skill on a step by step basis by observing flatness and sheet walking, however, in the mixed roll- Fig. For a variety of reasons, it is impossible to use tension direct control systems that is why tension value is inferred by the rolling motor torque. A = Area of contact of sheet and work roll. Passing steel sheet through a skinpass mill imposes tension and compression on the metal, theThe main methods of controlling the tension in the mill is with a tension free rolling speed control system and manually monitoring the current drawn by each motor as the bar proceeds through the mill. , Permyakova O. ne5) has given a value of 3. Span having equal level supports is called level span, whereas when the level of the supports is not at an equal level is known as unequal level span. It is a good practice to apply those results during the selection and calculation of the inferential tension controllers. They help in exerting back tension and front tension. Calculation of Sag & Tension Calculation of sag and tension in transmission line depend on the span of the conductor. A wheel rolling over a surface has both a linear and a rotational velocity. This paper focuses on interstand tension control problem in 5-stand tandem cold rolling mills. Figure 1 shows the mills used for calculation. 2 Discussion of the small spalling using a general tension compression fatigue …Improvement of Accuracy for Gauge and Elongation Control by Dynamic Process Control Simulator Toshiaki UENO*1 Kenji SORAO*2 sides of the mill. Load Analysis of Rolls in a Rolling Mill: A Comparison of Robert’s Formulation with the Experimental Method Solution to the problem lies in load analysis of rolls. During production the loop and tension control automatically adjust the R- Factor, ensuring minimum material stress between the stands. Rotational Motion of Wheel. and supply aluminum hot rolling mill facilities to foil. Tension settings, e …Rolling Mill Sensors Tension Measuring Systems. Before starting operation, rolling mills require settings, including q roll gap settings, w entry and delivery tension The rolling force and torque are the most important parameters influencing the determination of the energy for the rolling process. The Tube & Pipe Journal March/April 1998 September 4, 2001 This reduces the chances of strip cobbling, jam-ups, marking, tension, etc. propose a new tension estimation model using Support Vector Regression (SVR) to compensate for the above problems to obtain correct information on tension. Tandem POWER IN ROLLING Power is applied to the rolling mill by applying Torque to the rolls and by using roll strip tension**