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Founded in 1987, GME has attained 124 patents on crushers & mills over the past 30 years. More than 30 overseas offices not only manifest our popularity, but also solve your puzzles quickly in operation. So if you are looking for crushers or mills, GME deserves your attention!

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tension control method for a rolling mill

USA Method and system for controlling an . 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

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Basics of Web Tension Control Summary

Methods of Control (Speed Control) ( ) 1 2 1 1 2 2 1 V EA V -V V V =T ⎟⎟+ ⎠ ⎞ ⎜⎜ ⎝ ⎛ R T 1 T 2 V 1 V 2 T 2 = Rewind tension V 2 = Rewind velocity Where: T 1 = Tension in the previous tension zone V 1 = Nip roll velocity E = Elasticity of the material A = Cross sectional area of the material

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PROCESS OF ROLLING MILLS

25-02-2016· If a mill rolls 80 % of the calendar year, that is 365 x 24 x 0.80 = 7008 hours. If the mill rolls 800,000 tons per year, it runs at an average production rate of 114.16 tons/hour. If the

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US4162624A

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 workpiece is controlled by a looperless tension control method employing no looper at the threading stage of the top end and at the tail-out stage, and it is controlled by a tension control method employing a looper during the steady rolling.

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tension control method for a rolling mill

Rolling mill speed calculation formula pdf. 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.

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A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest - also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS File: SCHROEDER_ROLLS_010703.DOC

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tension control method for a rolling mill

21-01-2021· US4507946A Method and system for controlling an. 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 .

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Tension Control Method For A Rolling Mill

Tension Control Method For A Rolling Mill. rolling mill speed In general the rolling mill automation technology deal with the control problem by division into sub problems where both the adjust thickness and the interstand tension are independent1 decentralized strategy This classical strategy is employed and the results produced are acceptable

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Rolling Mill And Method For Controlling A Rolling Mill

The invention further relates to a method for controlling a rolling mill, in particular, a col Id strip tandem rolling mill (1), for producing a metal strip (100), wh< rein in a production direction (P) of the metal strip (100), a first st and (220) is controlled as driving stand (220, 260) said driving stand ( (220, 260) achieving a significant increase in the mechanical inlet tension on the

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Tension control method for a rolling mill

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.

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THE MECHANICS OF TENSION CONTROL

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 the rewind station. EXAMPLE OF A "DISHED ROLL"

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Tension Control Method For A Rolling Mill

Tension Control Method For A Rolling Mill. 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 Str225ske The given roughing mill consists of six rolling stands STD individually driven by motors.

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WINDER/UNWIND TENSION CONTROL

Notes: The tension is controlled by the brake, although it's limited capability is somewhat improved by the smooth control of the MLP-Trim. For better performance, the rest of this paper gives a wide range of options for better tension control. Also, for large (core to full roll) diameter changes, the CX-1010 performs better than the MLP-Trim.

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Technological control for cold rolling processes

Tension feed-forward control The tension feed-forward control responds to entry thickness deviations and applies a suitable adjust-ment to the coiler torque in order to consider the in-teractions between roll gap and tension. Important sensors in a cold rolling mill Laser speed sensor Thickness gauge ABB Stressometer ABB Strip scanner

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WINDER/UNWIND TENSION CONTROL

Notes: The tension is controlled by the brake, although it's limited capability is somewhat improved by the smooth control of the MLP-Trim. For better performance, the rest of this paper gives a wide range of options for better tension control. Also, for large (core to full roll) diameter changes, the CX-1010 performs better than the MLP-Trim.

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Tension Control Method For A Rolling Mill

Tension Control Method For A Rolling Mill. FOB Reference Price: Get Latest Price. 2019-2-18Do not attempt this method of measuring tension if there is a drive motor on the unwind or for a .

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

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,

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Basics of Web Tension Control Summary

Methods of Control (Speed Control) ( ) 1 2 1 1 2 2 1 V EA V -V V V =T ⎟⎟+ ⎠ ⎞ ⎜⎜ ⎝ ⎛ R T 1 T 2 V 1 V 2 T 2 = Rewind tension V 2 = Rewind velocity Where: T 1 = Tension in the previous tension zone V 1 = Nip roll velocity E = Elasticity of the material A = Cross sectional area of the material

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Looper and Tension Control in the Hot Strip Finishing Mill

This paper presents a new control method for interstand tension and looper height in the hot strip finishing mill. In the finishing mill, several passes of rolling are executed by tandem rolling in the presense of interstand tension. Tension can be adjusted either by manipulating roll speed or by using the looper, which is implemented between

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Method for controlling tension in a metal rolling mill

Interstand tension control system and method for tandem rolling mill: 4507946: Method and system for controlling an interstand tension in a continuous rolling mill: 4662202: Low tension cascade mill speed control by current measurement with temperature compensation: 4907433: Apparatus and method for adaptive control of a rolling mill

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Deformation Processing

Flat Rolling Analysis Results – without front and back tension p p µp µp σ σ x x + dσ x Stresses on Slab in Entry Zone Stresses on Slab in Exit Zone p p µp µp σ σ x x + dσ x Using slab analysis we can derive roll pressure distributions for the entry and exit zones as: h 0 and h b are the same thing 2tan1 ff RR H hh − φ = ()0 0 2

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Simulating a Multi-Stage Rolling Mill Process, Part 2

17-12-2009· 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.

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The development of the theory of metal rolling and its

The control of rolling is done by a machine, or rolling mill. From a control point of view it is necessary to study the combined behavior of machine and metal deformation to find the variables that may be used to most effectively regulate the process. A typical problem in this area is to control the output thick-

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Designing of Hot Strip Rolling Mill Control System

tension control system adopts the maximum torque method [2]. The basic control process is: C.Z. (2009) Hot Rolling Coiler Tension Control Designing of Hot Strip Rolling Mill Control

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Tension control method for a rolling mill

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.

Get Price

THE MECHANICS OF TENSION CONTROL

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 the rewind station. EXAMPLE OF A "DISHED ROLL"

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Control of Strip Tension in a Rolling Mill Based on

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

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Looper and tension control in hot rolling mills: A survey

01-07-2007· 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

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Tension Control Method For A Rolling Mill

Vertical grinding mill. Ultra fine vertical grinding mill. MTW european grinding mill. MB5X158 pendulum suspension grinding mill. Trapezium mill. T130X super-fine grinding mill

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Looper and tension control in hot rolling mills: A survey

01-07-2007· 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

Get Price