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tension controlled mill

WINDER/UNWIND TENSION CONTROL - Blackhawk Controls

subjecting it to pure tension. However, in usual applications, bolt tension is induced by torque on the nut and the bolt is subject to combined tension and torque, which may cause the bolt to fail at a load less than its strength in pure tension. RCSC states that pre-installation verification is necessary to: 1.

60 YEARS OF ROLLING MILL TECHNOLOGY By Ford B. Cauffiel

With Flex-Joist Tension-Controlled Open Web Steel Joist Design, each joist is . engineered to flex in the event of an overload to establish the new element of time-de-lay before the collapse of a steel joist roof or floor structure. Strain gauges installed post-erection by a third party throughout the system measure ductile tensile yielding

Basics of Web Tension Control Summary - tappi.org

Abstract : This paper describes interstand tension control by looper and looper less tension control of a hot strip mill finisher. The looper tension control methods are conventional, non-interactive, LQ (Linear Quadratic), H co, and ILQ(lnverse Linear Quadratic) control.

Tension control in tube and pipe production - The Fabricator

Motors account for at least half of the energy consumed in the U.S. Selecting the right control method for an application lets the motor run most efficiently while maximizing torque and overall ...

MAGPOWR | Maxcess Americas

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.

Case study: Drives and retrofits on paper mill slitter ...

WINDER/UNWIND TENSION CONTROL You may know them as winders, rewinds, recoilers or take-ups; likewise, you may know them as unwinds, uncoilers or pay-offs, but they are all the same subsection of web handling. Winders and unwinds are a critical portion of the web handling process.

New Rolling Method R f Reversing Cold Rolling Mill

tension control is ensured to be finished. Otherwise, the torque values will contain some disturbance signals which are not caused by tension variations, leading to errors of estimation and regulation. Minimum Tension Control Program The minimum tension control program with adaptability and some dead zone limit features, is shown in Fig.1.

Bridle Roll Unit Summary - Strip Metal Coil Processing

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.p.A. Enabling Sensing Technologies • Key to bar/billet tension control …

How to Choose the Right Control Method for VFDs | Machine ...

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

Looper and tension control in hot rolling mills: A survey ...

Apr 11, 2005· On a tube or pipe mill, the incoming strip is formed by about 24 pairs of tool stands. To help ensure such a line runs smoothly, the strip must be pulled between every pair of stands. The parameter that indicates if or how much the strip is pulled is tension. Traditionally, tension is controlled …

Looper and tension control in hot rolling mills: A survey ...

Tension control method for a rolling mill -, Ltd. Jul 31, 1979· In the control of the tension of a workpiece which is rolled by a tandem rolling mill, a tension control method for a rolling mill wherein the tension of a . Get More; Understanding Rolling Process in Long Product Rolling Mill,

tension controlled mill - wieklaartdeklus.nl

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. 1.8 Rolling defects: Mill spring is a defect in which the rolled sheet is thicker than the required thickness because,

Looperless Tension Control in Hot Rolling Process Using SVR

Jun 19, 2017· The 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. A looper table can be used to aid in keeping the bar tension free between stands.

Value Paper Authors: SUN Xin, SUN Han-feng Speed cascade ...

Solutions for cold rolling mills Technological controls for cold rolling processes Rolling of flat metal products is a complex process where the quality of the product is influenced by various factors like incoming material, mechanical and electrical equipment, lubrication and control strategies. For high-end performance in terms of

Rolling Mill Control - Russula

Looper and tension control is important in hot strip mills because they affect the strip quality as well as strip threading. Moreover, the most difficult challenge in controller design and control ...

Understanding Rolling Process in Long Product Rolling Mill ...

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. We will discuss: 1) What is tension? 2) Why is tension important to me? 3) Where is tension control important in the process? 4) How do tension controls work?

THE MECHANICS OF TENSION CONTROL - Converter …

fragile as it is rolled and tension between the finishing mill stands must be closely controlled at very low levels in order to avoid stretching or tearing the strip. Prior to the finish rolling operation, the head- and tail-ends of the transfer bar will be sheared to square them …

Understanding Dancer Tension Control Systems - tappi.org

looper control, there are a lot of applications where latest control theories had been applied, however, looperless interstand tension control of roughing mill remains a challenging problem. This paper proposes a looperless fuzzy interstand tension control system for a roughing mill of wire rod mill in Slovakia Steel Mills, a.s. Strážske.

1. Hot rolling and rolling defects: 1.1 Front and back ...

Nov 27, 2015· 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. High tension can stretch reduce the cross section of the bar making shape control very difficult. At the extreme, tension can pull the bar apart, creating a cobble.

Rolling Mill Control - Russula

OUTLINE OF REVERSING COLD ROLLING MILL 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 …

Tension Control of a Hot Strip Mill Finisher - PDF Free ...

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

The Hot Rolling Process - California Steel Industries

A Bridle roll unit can affect the tension in the strip according to the formula T2 = T1·eμα, where T1 and T2 are the tensions on either side of the bridle roll, μ is the coefficient of friction between the roll and the strip, and α is the angle of wrap of the strip around the roll in radians.

Tension Control of a Hot Strip Mill Finisher - ScienceDirect

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 coiler control system hardware is designed. The system is designed scientifically with steady control and meets demand of ...

Fuzzy Multiple Stand Tension Control of a Roughing Rolling ...

Jan 01, 2013· To reduce the material tension along the mill two types of control are applied: minimum tension control and loop control. Each is applied in different parts of the mill. In the first part of mill, roughing and intermediate zone, where the bar section is larger; the minimum tension control is used.

steelwise - AISC Home

Tandem cold rolling process is a nonlinear complex system with external and internal uncertainties and significant disturbances. The improvement in the quality of the final output depends on the control strategy of centerline thickness and interstand tension. This paper focuses on interstand tension control problem in 5-stand tandem cold rolling mills.

Rolling of Steel in a Modern Long Product Rolling Mill ...

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

Tension Control Systems - steminbreitbach.com

12 DFP Air Cylinder& Regulator • Velocity affects air cylinder & regulator combination • Pressure regulator can make or break dancer system • Must have sensitive relieving regulator (grab dancer arm & pull up quickly) Air Reservoir Recommended: Add an air reservoir between the regulator and cylinder.The reservoir volume must be much larger than the cylinder volume

Designing of Hot Strip Rolling Mill Control System

The mill turned to SDS Inc, a U.S.-based systems integrator that specializes in control designs for paper and web handling industries. SDS analyzed the existing system and provided a cost-effective solution that utilized existing motors and components, integrated ABB's state-of-the-art ACS800 AC drives and new DCS800 DC drives – the most ...

FUZZY TENSION CONTROL OF THE WIRE ROD ROUGHING …

This paper describes interstand tension control by looper and looper less tension control of a hot strip mill finisher. The looper tension control methods are conventional, non-interactive, LQ (Linear Quadratic), H ∞, and ILQ(Inverse Linear Quadratic) control.

Tech - Automation To Improve Productivity and Quality

Tension Control Systems for Light, Medium, and Heavy-Duty Tensioning. Warner Electric Altra Industrial Motion Altra is a leading multinational designer, producer and marketer of a wide range of mechanical power transmission products. We sell our products in over 70

Solutions for cold rolling mills Technological controls ...

Tension | Loop Control. Tension and loop control reduces the material stress along the mill,to diminish dimensional and metallurgical defects. Russula has developed and improved this control module over the years, ensuring the right response in all situations.

Enabling Sensing Technologies - IEEE Control Systems Society

including hydraulic screwdowns, hydraulic roll bend, and tension control. This book does not focus on these specific rolling mill manufacturers and their various methods of manufacturing and patentability. My intent in this book is to show the modern rolling techniques that

Robust Tension Control of Strip for 5-Stand Tandem Cold Mills

Smooth, precise control is the objective of all clutches and brakes, but few achieve one—never mind both—of these goals. MAGPOWR's innovative Perma-Tork® permanent magnet clutches are …

Flex-Joist Tension-Controlled Open Web Steel Joist Design

Tension | Loop Control. Tension and loop control reduces the material stress along the mill,to diminish dimensional and metallurgical defects. Russula has developed and improved this control module over the years, ensuring the right response in all situations.

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