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OPUS at UTS: Analysis of thin strip profile by work roll ...

Oct 01, 2006· In this paper, a four-high cold strip rolling mill with work roll shifting is considered and the mechanism of the thrust force is analyzed. Based on the analysis of the relative contact pair displacement vectors, a method reducing the thrust force is presented. The principle for work roll shifting and crossing is discussed.

OPUS at UTS: Analysis of thin strip profile during ...

A flatness disturbance can be produced at a hot strip mill by a mismatch between the work roll profile and the incoming strip thickness profile. This will produce a non-uniform reduction across the width of the strip, leading to a non-uniform elongation of the strip in the direction of rolling (Heaven 1988).

Modeling of Thin Strip Profile during Cold Rolling on Roll ...

• A roll that has a diameter at the ends slightly larger than in the center. The surface speed is greater at the ends than the center. The surface speed difference causes an ingoing web tension distribution that is shaped similar to the speed profile. • Too Much Crown- Roll becomes a Web Buncher-upper! • Most Effective on Extensible Materials

Modeling of thin strip profile during cold rolling on roll ...

shifting to where the unsupported web is slit before it is in contact with the lower slitter. However, increasing overlap in both systems increases the amount of deflection the web must take to go around the upper blade which can decrease slit edge quality. Side force Side force refers to the amount of force applied laterally from the upper

11.Advanced Process Control Technology for Thin Strip ...

The influences of rolling process parameters such as the work roll cross angle and work roll shifting on the strip shape and profile of thin strip are recognised throughout this study.

Analysis of thin strip profile by work roll crossing and ...

Strip profile control in cold rolling of thin strip is a difficult and challenge problem found in industry. Currently using the novel type of strip rolling mill, such as the work roll crossing and shifting is the one of the main methods to control the strip profile quality in cold rolling.

Rolling mill optimization using an accurate and rapid new ...

Analysis of thin strip profile by work roll crossing and shifting in asymmetrical cold rolling ... extensive tests were carried out on a 4-high rolling mill equipped with a work roll crossing and ...

Analysis of Thin Strip Profile during Asymmetrical Cold ...

Strip profile control during rolling is required to assure the dimensional quality of rolled thin strip is acceptable for customers. Throughout rolling, the strip profile is controlled by using the advanced shape control rolling mill, such as the combination of work roll crossing and shifting during asymmetrical rolling, the one of the valuable ...

Figure 3 | Improving Thin Strip Profile Using Work Roll ...

In hot strip rolling, the work roll shift method has been widely used to disperse thermal crown and wear of work roll in axial direction. This paper provides a strategic control method for the work roll profile surpassing the conventional work roll shifting method.

Guidelines for Rolls Used in Web Handling - AIMCAL

between the backup roll and the work roll respectively. The hydraulic actuators are equipped to change the rolling process. The actions include leveling of the back-up rolls, bending of work rolls and immediate rolls, shifting of immediate rolls, that means, the immediate rolls can be axially shifted to

On-line flatness measurement of large steel plates using ...

Forging is a simple and low-cost mass production process. Metallic materials can be processed using plastic deformation. This research analyzes an innovative forging mold design for the highway bicycle pedal. A series of simulation analyses in which the variables depend on various temperatures of forging billet and mold, friction factors, and forging speed show effective stress, effective ...

US6119500A - Inverse symmetrical variable crown roll and ...

A simplified numerical method is proposed in this article to predict strip profile. The mill is simulated by beams (rolls) on the infinite elastic half space (between rolls and strip). The roll deflection and indentation are calculated using the influence coefficients and Boussinesq's equations respectively.

Thin Strip Profile Control Capability of Roll Crossing and ...

Roll wear and fatigue are inevitable phenomena during hot-rolling process. Finite element (FE) analysis shows that roll profiles, especially work roll wear profile, have significant effects on contact stress distributions. Long-term effect of huge contact stress peaks in roll sides is the main factor for roll …

Mechanics of roll edge contact in cold rolling of thin strip

Abstract. Strip profile control in cold rolling of thin strip is a difficult and challenge problem found in industry. Currently using the novel type of strip rolling mill, such as the work roll crossing and shifting is the one of the main methods to control the strip profile quality in cold rolling.

Section 16: Neutral Axis and Parallel Axis Theorem

Strip profile control during rolling is required to assure the dimensional quality of rolled thin strip is acceptable for customers. Throughout rolling, the strip profile is controlled by using the advanced shape control rolling mill, such as the combination of work roll crossing and shifting during asymmetrical rolling, the one of the valuable methods to control the strip profile quality in ...

Analysis of thrust force in a work roll shifting mill ...

Analysis of thin strip profile during asymmetrical cold rolling with roll crossing and shifting mill. Aljabri, A Jiang, ZY Wei, DB. Permalink. Export RIS format; Publication Type: Journal Article Citation: Advanced Materials Research, 2014, 894 pp. 212 - 216 Issue Date: 2014-03-19 ...

Analysis of Thin Strip Profile during Asymmetrical Cold ...

Controlling cold strip profile is a difficult and significant problem has been found in industry during thin strip rolling. At present choosing the new type of strip rolling mill is the one of main methods to control the strip shape quality in cold rolling. The influences of rolling process parameters such as the work roll cross angle and work roll shifting on the strip shape and profile of ...

Spalling Prevention and Wear Improvement of Rolls in Steel ...

The purpose of work roll crossing is to obtain a larger efficiency of shape and profile control by increasing the roll gap by increasing the distance from the roll center [].By slightly crossing the upper and lower work rolls and reducing the roll force across the roll from the center to the edge of the strip, a bigger crown can also be achieved.

(PDF) Analysis of thin strip profile by work roll crossing ...

In order to analyze the effects of cold rolling parameters such as the crossing angle and axial shifting value of work rolls on the strip profile, extensive tests were carried out on a 4-high rolling mill equipped with a work roll crossing and shifting system. The results show that the strip profile is nearly flat under asymmetrical rolling.

Highest performing Hot Strip Mills | Primetals Technologies

This work presents improved technology for attaining high-quality rolled metal strip. The new technology is based on an innovative method to model both the static and dynamic characteristics of rolling mill deflection, and it applies equally to both cluster-type and non cluster-type rolling mill configurations. By effectively combining numerical Finite Element Analysis (FEA) with analytical ...

Magnetic Abrasive Finishing of Internal Surface of ...

Aljabri, A., Jiang, Z. & Wei, D. (2015). Analysis of thin strip profile by work roll crossing and shifting in asymmetrical cold rolling. International Journal of Modern Physics B, 29 …

Prediction of Strip Profile in Rolling Process Using ...

SmartCrown work rolls feature a modified, sine-shaped contour. By selecting the correct contour coefficients and shifting the work rolls by the same amount in opposite directions, the resultant unloaded roll gap is always cosineshaped, regardless of the actual shifting position of the rolls. Work Roll …

"Analysis of thin strip profile by work roll crossing and ...

[1-3], as well as work rolls crossing and shifting (RCS) [4] mills have been introduced and developed to improve the strip shape and profile. The PC mill was first used commercially at Nippon Steel's Kimitsu Works in 1991 [1], and it has been commonly used in hot rolling mills for plating and stripping as a …

Finite Element Analysis and Mold Design of Forging Process ...

Work roll shifting is used to change the effective roll crown. This function changes the roll crown flexibly in accordance with profile and flatness control. The high-speed strip shear in front of the down coilers is a rotary drum type shear and can cut the strip while running at high speed.

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Analysis of thin strip profile by work roll crossing and shifting in asymmetrical cold rolling Article (PDF Available) in International Journal of Modern Physics B 29(10n11):1540032 · April 2015 ...