Elongation control of the ultra-thin tinplate during two-stand temper rolling unsteady process

Abstract

The elongation closed-loop control mode is essential for the temper rolling of the ultra-thin tin plate. During an unsteady process, the interstand tension is used for the stabilization of the elongation. But due to the drastic changes of the rolling force and rolling speed, the elongation fluctuation is beyond the tension control, which leads to the flatness degradation. In order to stabilize the elongation and the flatness, the adaptive compensation control for rolling force during the unsteady process is discussed in this work. This gain compensation for rolling force is based on the theoretical results from the rolling force model and validated from experimental results. Industrial experiments and application show the fluctuation of the elongation reduces by 90.11% during the unsteady process. Meanwhile, the change range of interstand tension reduces from 14% to less than 5%, length of the flatness degradation period decreases from over 180 m to shorter than 60 m.

Get full access to this article

View all access options for this article.

References

Engler

Schäfer

Brinkman

et al. Flexible rolling of aluminium alloy sheet—process optimization and control of materials properties. Journal of Mater Process Technol. 2016;229:139–148. doi: 10.1016/j.jmatprotec.2015.09.010

Kou

Wang

Dou

et al. Research on elongation control system of planishing mill. Heavy Machinery. 2011;(4):57–59. (in Chinese).

Zhang

Dai

et al. Analysis of warping deformation for cold-rolled strips. J Univ Sci Technol B. 2014;36(3):378–382. (in Chinese).

Zhang

Zhou

Yin

JC.

Numerical simulation on the waveshaped defect generation and tension straightening process of thin strips. Chin J Mech Eng. 2015;37(6):798. (in Chinese).

Bai

Lian

et al. Research about the set of the elongation percentage of planishing mill. Metall Equip. 2005;1:25–26. (in Chinese).

Bai

Chen

Jiang

et al. Research on elongation distribution model of two-stand skin miller. Chin J Mech Eng. 2005;16(15):1332–1334. (in Chinese).

Bai

Lian

JC.

Improvement on the rolling force model of the skin pass mill. Shanghai Met. 2004;26(1):33–36. (in Chinese).

Bai

Zhu

Dai

et al. Rolling parameters optimal setting for VC roller tempering mills in wet temper rolling. J Plast Eng. 2014;21(4):92–96. (in Chinese).

Sun

MJ.

Research on elongation control system of double stands skin pass mill [Degree Thesis]. Beijing: Beijing Research Institute of Automation for Machinery Industry; 2012. (in Chinese).

10.

Shen

Yuan

Hou

et al. Research on strip steel elongation compensation technique in process of CAPL over weld. Mech Eng Automat. 2017;1:15–16. (in Chinese).

11.

Zhang

Chen

et al. Research on strip steel shape control technique in process of CAPL over weld. Mech Eng Automat. 2017;1:151–152. (in Chinese).

12.

Huang

CQ.

Elongation control technique for baosteel 1550 mm CAL temper mill. Metall Ind Autom. 2004;28(1):30–34. (in Chinese).

13.

Chen

Wang

GM.

Temper mill control in continuous annealing processing line of Baosteel. Metall Ind Autom. 2011;35(1):51–55. (in Chinese).

14.

Liu

XL.

Research on elongation control system of skin pass mill [Degree Thesis]. Shenyang: Northeastern University; 2012. p. 0. (in Chinese).

15.

Zhou

Liu

et al. Elongation control of skin pass mill based on adjusting of rolling force and tension. Electr Drive. 2015;45(1):51–54+75. (in Chinese).

16.

Mazur

Artiukh

Matarneh

MI.

Horizontal force during rolling as indicator of rolling technology and technical conditions of main rolling equipment

. Procedia Eng. 2016;165:1722–1730. doi: 10.1016/j.proeng.2016.11.915