Analysis and Experiment on Central Buckling and Post Buckling of Thin Cold-rolled Sheet

Dai, Jietao

doi:10.3901/jme.2011.02.044

Cited by 8 publications

(3 citation statements)

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“…The number of unknowns is reduced by half through introducing the continuous two-order derivative of the nodal line and the stress boundary condition of the free edge, so its calculation speed has also improved significantly. Furthermore, the buckling and post-buckling models of the central wave and local shape defects were established by Zhang, et al [28][29][30][31]. Theoretical and experimental studies on the buckling behavior of a strip with initial wave and a flat strip have been conducted to enrich the strip buckling theory.…”

Section: Strip Bucklingmentioning

confidence: 99%

Research and Development Trend of Shape Control for Cold Rolling Strip

Wang

Liu

2017

Chin. J. Mech. Eng.

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Shape is an important quality index of cold rolling strip. Up to now, many problems in the shape control domain have not been solved satisfactorily, and a review on the research progress in the shape control domain can help to seek new breakthrough directions. In the past 10 years, researches and applications of shape control models, shape control means, shape detection technology, and shape control system have achieved significant progress. In the aspect of shape control models, the researches in the past improve the accuracy, speed and robustness of the models. The intelligentization of shape control models should be strengthened in the future. In the aspect of the shape control means, the researches in the past focus on the roll optimization, mill type selection, process optimization, local strip shape control, edge drop control, and so on. In the future, more attention should be paid to the coordination control of both strip shape and other quality indexes, and the refinement of control objective should be strengthened. In the aspects of shape detection technology and shape control system, some new types of shape detection meters and shape control systems are developed and have successfully industrial applications. In the future, the standardization of shape detection technology and shape control system should be promoted to solve the problem of compatibility. In general, the four expected development trends of shape control for cold rolling strip in the future are intelligentization, coordination, refinement, and standardization. The proposed research provides new breakthrough directions for improving shape quality.

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Section: Strip Bucklingmentioning

confidence: 99%

Research and Development Trend of Shape Control for Cold Rolling Strip

Wang

Liu

2017

Chin. J. Mech. Eng.

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“…Zhang et al 20,21 attributed the buckling phenomenon to transverse-induced compressive stresses caused by local longitudinal uneven stretching of steel strips and analyzed the critical conditions of flatness and buckling for steel plates under high temperatures in an annealing furnace. Dai and Zhang 22 developed an analytical solution for the post-buckling path of the central wave buckling problem. Yang 23 believed that flatness defects originated from unevenness in the horizontal and longitudinal cooling during the rapid cooling process.…”

Section: Introductionmentioning

confidence: 99%

Flatness evolution of cold-rolled high-strength steel strips during quenching process

Zhang

Lin

Cao

et al. 2017

Advances in Mechanical Engineering

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Drastic flatness changes in high-strength steel strips during water quenching cause problems for both their subsequent manufacture and final products. In this work, a temperature-microstructure-stress coupled finite element model is established to simulate the quenching process of cold-rolled high-strength steel strips using a UMAT subroutine in ABAQUS. The evolution mechanisms of two main forms of flatness defects, including C warping defect and edge wave defect, are investigated. Our simulations reveal that the temperature gradients of the strips induce their extension differences along transversal/thickness direction and the sequential phase transformation, both of which finally cause the flatness changes. Furthermore, flatness control strategies are proposed according to the integrated effects of the tension and initial temperature differences during quenching. In addition, quenching experiments are implemented to validate the numerical results.

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“…According to the shape control process, the shape control scheme can be divided into two types, the feed-forward and the feedback [17][18][19][20][21]. Of course, the ideal shape control scheme is to install a shapemeter before and after the mill.…”

mentioning

confidence: 99%

Detection and evaluation mechanism of cold rolling strip edge shape

Yang

et al. 2017

Ironmaking & Steelmaking

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The edge shape problem of strip has great influence on the shape control precision, so it is extremely necessary to establish the high-precision strip edge shape model. Based on the theoretical analysis and the practical engineering, a new high-precision shape detection model, which consists of wide channels in the middle of detection roll and narrow channels on both sides, is established to analyse the problem of strip edge shape. Instance data showed that the strip lateral thickness difference was directly related with the shape state of strip, and the strip edge coverage rate and the strip deviation amount had important influences on the shape detection precision, the pattern recognition accuracy and the shape control effect, so the strip edge shape model has become one of the key factors to improve industrial application effect of the shape closed-loop control system in the present situation.

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Analysis and Experiment on Central Buckling and Post Buckling of Thin Cold-rolled Sheet

Cited by 8 publications

References 0 publications

Research and Development Trend of Shape Control for Cold Rolling Strip

Research and Development Trend of Shape Control for Cold Rolling Strip

Flatness evolution of cold-rolled high-strength steel strips during quenching process

Detection and evaluation mechanism of cold rolling strip edge shape

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