Force limiting at roll axial shifting of plate mill

Karandaev, A. S.; Loginov, B. M.; Gasiyarov, Vadim R.; Khramshin, Vadim R.

doi:10.1016/j.proeng.2017.10.713

Cited by 24 publications

(8 citation statements)

References 12 publications

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“…The same head is mounted on the side of the motor. The spindle shaft is slotted to compensate for the axial displacement occurring when the rolls are displaced by the continuous variable crown (CVC plus ) system [12]. The spindle bearing is located near the middle of the shaft.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Torque Limitation Principle in the Main Line of a Mill Stand: Explanation and Rationale for Use

et al. 2019

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This paper substantiates why it is necessary to limit the dynamic loads in stand shafts when closing angular gaps. The paper is a feasibility study of a concept developed specifically to limit each of the factors that affect amplitude of the dynamic torque; limitations applied are determined on a case-by-case basis. The research team studied the components of elastic torque in a dual-mass electromechanical system of Mill 5000 caused by vibrations arising from the elasticity of transmission as well as from the vibrations caused by elastic collision itself. It is shown that the lowest possible pre-acceleration is necessary for decreasing the dynamic coefficient at a near-nominal load torque. A principle of limiting dynamic loads when closing an angular gap is proposed, which implies collecting tachograms of an electric drive subjected to positive or negative acceleration before and after the fed metal is captured. The research team has developed drive control principles to implement this approach. The recommendation is to upgrade the electric drives of the reversing stand in Mill 5000.

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Section: Introductionmentioning

confidence: 99%

Dynamic Torque Limitation Principle in the Main Line of a Mill Stand: Explanation and Rationale for Use

et al. 2019

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“…Xu et al 13 introduced a method to design the CVC-Plus work roll curve. Karandaev et al 14 verified that the roll changing period was improved due to the decrease of friction forces in the axial direction. Linghu et al 15 developed a 3D elastic-plastic finite element method (FEM) model of cold strip rolling for a 6-high CVC mill.…”

Section: Introductionmentioning

confidence: 97%

Optimization of continuous variable crown work roll shifting strategy using k‐nearest neighbors algorithm for hot strip rolling mill

Gong

2021

Engineering Reports

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Appropriate work roll shifting strategy in the finishing hot strip mill can make roll wear uniform and contour smooth. To eliminate the problem of roll shifting position duplication due to available roll shifting strategy, the optimized work roll shifting strategy is proposed in the hot strip rolling mill with continuous variable crown work rolls, using the k-nearest neighbors algorithm. The self-perpetuating parameter is used to describe the concentrated wear of the work roll. The position repeated parameter is put forward to evaluate the roll shifting position history. The relationship between concentrated shifting positions and uneven roll wear is analyzed based on in-site data collected in a hot strip rolling mill. The program of optimization strategy is coded using language C. Off-line simulation is made to obtain optimized shifting positions using the program. The comparison between in-site engineering data and optimized shifting positions has been assessed using the scatter diagram and kernel density estimation. Comparison results show that the new strategy can solve the problem of shifting position duplication well. A simplified methodis established to make it easy to apply the strategy to online applications, and the in-site application shows that the optimization strategy has an excellent practical effect.

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“…Except rolling process parameters, the use of rolling equipment also has an important impact on rolling mill vibration. [16][17][18] In the hot rolling process, faster and harder rolling is required to obtain thinner, higher quality strips. In order to cope with the greater impact generated during the rolling process, a rolling mill stabilizing device composed of a hydraulic cylinder with a hole is used in actual production.…”

Section: Introductionmentioning

confidence: 99%

Vertical Vibration Characteristics of Strip Rolling Mill under Compound Roll Bearing Failure

Hou

Sun

et al. 2022

ISIJ Int.

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A vertical vibration model of a 3-DOF strip rolling mill with a compound roll bearing failure on the outer raceway and inner raceway is established. Through MATLAB simulation, the vertical vibration characteristics of the strip mill work roll are compared and analyzed under the condition that the outer raceway failure of the roller bearing remains unchanged, the inner raceway failure changes and the inner and outer raceway failures change simultaneously. It provides a certain theoretical basis for further clarifying the non-linear vibration mechanism of the rolling mill caused by the compound bearing failure. At the same time, when the internal and external raceways of the roller bearing have a compound failure, the effects of different roller numbers and contact angles on the vibration displacement fluctuations of the work roll are analyzed, which has certain theoretical guidance for the optimization design of the roll bearing.

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Force limiting at roll axial shifting of plate mill

Cited by 24 publications

References 12 publications

Dynamic Torque Limitation Principle in the Main Line of a Mill Stand: Explanation and Rationale for Use

Dynamic Torque Limitation Principle in the Main Line of a Mill Stand: Explanation and Rationale for Use

Optimization of continuous variable crown work roll shifting strategy using k‐nearest neighbors algorithm for hot strip rolling mill

Vertical Vibration Characteristics of Strip Rolling Mill under Compound Roll Bearing Failure

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