ASR work roll shifting strategy for schedule-free rolling in hot wide strip mills

Cao, Jian; Liu, Sijia; Zhang, Jie; Song, Ping; Yan, Tao; Zhou, Yizhong

doi:10.1016/j.jmatprotec.2011.05.025

Cited by 57 publications

(40 citation statements)

References 7 publications

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“…And the position with maximum wear quantity transfers from backup roll end to the extreme point with larger work roll radius as shown in Figure 9. The roll contour self-maintenance parameter and roll contour variation characteristic can be introduced to appraise the backup roll wear pattern [21][22][23]. For the original backup roll end chamfer, the self-maintenance parameter is 82.06%.…”

Section: Backup Roll Chamfer Designmentioning

confidence: 99%

“…Cao et al [21] presented a parameter to appraise the roll contour self-maintenance and analyzed the backup roll wear of hot wide strip mill. Cao et al [22] also used this method to evaluate the self-maintenance of an asymmetry self-compensating work roll for schedule-free rolling in a 1700 mm hot strip mill. Xu et al [23] applied this method on CVC work roll wear of hot strip finishing mill.…”

Section: Introductionmentioning

confidence: 99%

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Axial Force Analysis and Roll Contour Configuration of Four-High CVC Mill

Liu

Huang

et al. 2018

Mathematical Problems in Engineering

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In order to analyze the influence of technical parameters on work roll axial force of four-high continuous variable crown (CVC) mill, the deformation analyzing model with top roll system and strip was established based on influence function method. Then a CVC work roll curve designing scheme was proposed and it was carried out on some cold rolling mill considering the requirement of comprehensive work roll axial force minimization. The status of comprehensive work roll axial force is improved considering the rolling schedule that is beneficial to the roller bearing. Corresponding to the newly designed work roll contour, the backup roll end chamfer was designed considering comprehensive performance of interroll stress concentration, comprehensive work roll axial force, and strip shape control ability. The distribution of roll wear with newly designed backup roll contour is more even according to the field application data. The newly established roll configuration scheme is beneficial to four-high CVC mill.

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Section: Backup Roll Chamfer Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Axial Force Analysis and Roll Contour Configuration of Four-High CVC Mill

Liu

Huang

et al. 2018

Mathematical Problems in Engineering

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“…The ASR technology could eliminate the work roll "U" groovetype wear by changing the work roll wear contour from U-type to L-type and make strips always rolled in a relatively flat region by the asymmetrical roll contour and irreversible shifting with the same shifting device as the K-WRS and CVC, which is evidently different from the K-WRS technology. [3] ASR hydraulic work roll heavy bending device with the capacity of 2000 kN chock À1 and almost the same ASR contours within the entire rolling campaign provides an enough adjustment capacity of the loaded roll gap profile. The accuracy of the preset bending force model affects the profile and flatness of strip directly, which also has influence on the production efficiency.…”

Section: Introductionmentioning

confidence: 84%

“…However, the existing profile and flatness control technologies could not have both crown control and wear control abilities. Cao et al suggested that the asymmetry self-compensating work rolls (ASR) mill have both crown control and wear control abilities and it is especially beneficial to the large number of the same width strip rolling campaigns and improve the strip quality of profile and flatness even if without the lubricating rolling technology, HSS roll, ORG, and other devices [3] as shown in Figure 1. The ASR technology could eliminate the work roll "U" groovetype wear by changing the work roll wear contour from U-type to L-type and make strips always rolled in a relatively flat region by the asymmetrical roll contour and irreversible shifting with the same shifting device as the K-WRS and CVC, which is evidently different from the K-WRS technology.…”

Section: Introductionmentioning

confidence: 99%

ASR Bending Force Mathematical Model for the Same Width Strip Rolling Campaigns in Hot Rolling

Liu

Cao

Yang

et al. 2014

steel research int.

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According to the requirement and condition of schedule-free rolling (SFR) for non-oriented electrical steel production with a large number of the same width strip rolling campaigns, asymmetry self-compensating work rolls (ASR) bending force mathematical model for different rolling schedules is established. Based on ANSYS software package, a 3D finite element model of roll stacks is established on the consideration of roll wear and thermal contour of work rolls. The effects of the bending force, the strip width, the rolling force, the diameters of backup and work rolls, the work roll shifting stroke on the loaded roll gap crown in rolling process are quantitatively analyzed. The developed ASR bending force mathematical model for different conditions is proved to be reasonable and has been applied to the 1700 hot strip mills.

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“…So the roll contact pressure should be analyzed. A 3D finite element model of roll stacks for 1800mm hot rolling mill was built using ANSYS software package [6,7] , just as Fig.2 shown. The roll contact pressure can be calculated by the finite element model.…”

Section: Analysis Of the Backup Roll Contour Of The 1800mm Cvc Continmentioning

confidence: 99%

Analysis and optimization of CVC backup roll contour of a 1800mm continuous hot rolling mill

Shang¹,

Li²,

Zhang³

et al. 2015

Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering

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Abstract. The backup rolls are used with work rolls and their service period is much longer than work rolls. The backup roll affects the control ability of the mill for profile and flatness of products and roll contact pressure. If the backup roll contour is not appropriate, there will be a non-uniform roll contact pressure and the peak value of roll contact pressure may be large. According to the actual situation of a 1800mm CVC mill, combined with the typical wear condition of backup roll, A 3D finite element model of roll system was established. The roll contact pressure is analyzed with the model, and the improvement method of backup roll contour is proposed. With the improved backup roll contour, the non-uniform level of roll contact pressure drops by 18.2% and the peak value of roll contact pressure descends by 19.1%. All these can reduce the consumption of backup roll and the risk of backup roll spalling effectively.

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ASR work roll shifting strategy for schedule-free rolling in hot wide strip mills

Cited by 57 publications

References 7 publications

Axial Force Analysis and Roll Contour Configuration of Four-High CVC Mill

Axial Force Analysis and Roll Contour Configuration of Four-High CVC Mill

ASR Bending Force Mathematical Model for the Same Width Strip Rolling Campaigns in Hot Rolling

Analysis and optimization of CVC backup roll contour of a 1800mm continuous hot rolling mill

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