tension controlled mill


Forming Fabric Tensioning and Guiding - Convergence ...

occur when tension is not controlled at the unwind station. • It is impossible to rewind rolls from a process without proper tension control at the rewind station. Telescoping, "dished" rolls, wrinkles and even web breaks will occur when tension is not controlled at …

Control of Strip Tension in a Rolling Mill Based on ...

The VERSATEC Versatile Tension Control is a... MAGPOWR Spyder Plus Tension Control Designed for precise tension control, MAGPOWR's cost-effective Spyder Tension Control is capable of controlling web tension …

Tension and Thickness Control Strategy Analysis of Two ...

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

The Study of Continuous Rolling Mill Inter-stand Tension ...

Jun 21, 2016· The Mechanical of Tension Control

CONTROLLED ELONGATION MACHINES FOR PROCESSING …

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 …

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

In order to lucubrate the rolling characteristic of the two stands reversible cold rolling mill and establish the tension and thickness control strategy, the steady-state characteristic simulating program was established using the steady-state continuous rolling theory. The influences of each factor on exit thickness under different tension control …

Control of Strip Tension in a Rolling Mill Based on ...

Aug 01, 1990· 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 …

60 YEARS OF ROLLING MILL TECHNOLOGY By Ford B. Cauffiel

The looper and tension control is important in a hot strip mill because it affects the strip quality as well as strip threading. There are tension disturbances, which might cause constraint violations in the transient state resulting in severe defects of strip quality and instability of operation. Therefore, constraints in controller design should be considered.

Unified gauge-tension control in cold rolling mills: A ...

Tension control is one of the most important process parameters in tandem cold mill (TCM). Changing roll velocity stabilizes the interstand tension [3] . Interstand tension should be maintained at ...

Tandem cold mills (Steel) | SMS group

tension. Fig. 1 shows the detail of the tension and looper control in the finishing mill. To control inter-stand strip tension the rotating speed of the upstream stand's mill motor or torque of the looper motor can be manipulated. The looper between the stands reduces tension …

New tension control at the head of strip in hot strip ...

Tension control plays an important role in assuring product quality and process stability in steel rolling industry. Especially on looper control, there are a lot of applications where latest control theories had been applied, however, looperless interstand tension control of roughing mill …

Flex-Joist Tension-Controlled Open Web Steel Joist Design

What is the problem with low fabric tension? Very low fabric tension can cause slippage at the driven forming section rolls, and wire flexing at the gravity foils and vacuum boxes. This can lead to wire abrasion, and guiding and speed control …

Simulating a Multi-Stage Rolling Mill Process, Part 3 ...

USA US07/517,117 USA USA US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords tension stand speed strip control …

USA - Gauge and tension control system for tandem ...

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.

A Flatness Based Approach for the Thickness Control in ...

X. Zhang and Q. Zhang, "Robust control of strip tension for tandem cold rolling mill," in Proceedings of the 30th Chinese Control Conference (CCC '11), pp. 2390–2393, Yantai, China, July 2011. View at: Google Scholar; J. Pittner and M. A. Simaan, Tandem Cold Metal Rolling Mill Control Using Practical Advanced Methods, Springer, London, UK ...

Tension Control Study in the Finishing Mill of Aluminum ...

Tension-Controlled Open Web Steel Joists offers a safety feature to building owners and managers seeking additional protection against potential overload conditions and the related risks of damage, injury and exposure to liability. Under most overload conditions, Flex …

Tension and Torque Controls | Maxcess Americas

More advanced control systems use tension meters (Zhao et al., 2008) to measure the current strip tension. Choi et al. (2007a) advocate the use of lin-ear model predictive control (MPC) for loopers and strip Strip Mill stand Looper Fig. 1. Tandem rolling mill with ve mill stands. tension as this control approach facilitates a systematic

USA - Tandem rolling mill tension control with ...

CONTROLLED ELONGATION MACHINES APPLICATION IN PROCESSING LINES Type of line Skin-pass-mill Tension leveler Scale breaker Multi-roll tension leveler Carbon Steel Continuous galvanizing line Roughness transfer YPE removal Flatness improvement YPE removal Continuous annealing line Continuous pickling line Roughness transfer Flatness improvement ...

The Mechanics of Tension Control - YouTube

Jun 19, 2017· As the bar progresses through a continuous mill where the bar is rolled in multiple stands simultaneously, the stand speed must be controlled to ensure tension free rolling. 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 ...

Balanced, Tension-Controlled, and Compression-Controlled ...

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 memory ...

Unified gauge-tension control in cold rolling mills: A ...

Jul 01, 2007· The availability of tension measurements has enabled tension feedback and the reduction of interaction by changing control pairings such that the rotating speed of a mill motor controls strip tension while angular velocity of a looper motor controls looper angle.

Understanding Rolling Process in Long Product Rolling Mill ...

Tension produces various products which include plates, hot and cold rolled coils, Carbon Steel Pipes, Carbon Steel Rectangular Pipe, API Pipes、Galvanize Pipes、Structures Pipes、Fire control Pipes and Automobiles、Bicycle Pipes. The major products of Tension are API pipes and capacity, the output is 5000 tons per month.

Minimum Tension in a Merchant Bar Rolling Mill using ...

An alternate option may include torque stabilization by to the effect on speed of the previous, further or controlled mill stand. The tension control accuracy depends on how exact the unhindered ...

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