Development and application of explicit function model on rolling force for stainless steel in tandem cold rolling
CHEN Jin-shan1,LI Chang-sheng1,CAO Yong2
1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819,Liaoning, China 2. Baosteel Stainless Steel Co., Ltd., Shanghai 200431, China
Abstract:The conception of dynamic deformation resistance was put forward considering tandem cold rolling of stainless steel. In order to establish the model of dynamic deformation resistance for stainless steel, cold rolling and tensiling of stainless steel strip was studied in the laboratory through cold four-high reversible mill and Inston tensile testing machine. Meanwhile, stress-strain curves of stainless steel were gained with MMS-200 thermo-mechanical simulator. Based on the Hill equation, explicit function model on rolling force was built, the self-adaptive learning of which can be achieved by converse regression calculation of deformation resistance and friction coefficient on line. An evaluation method of the confidence level of rolling force model was also presented. Thiel inequality coefficient method was introduced, and then the TIC (Theil Inequality Coefficient) value of model was computed to analyze qualitatively the applicability of model. Ultimately, the precise mathematical model on rolling force for cold tandem rolling of stainless steel was established, and it was put into practical production. Statistics show that the measured data was in excellent agreement with the model, and exactly, the relative deviation on rolling force was less than 3.67%. The model has high precision and good generalization capability. It is applicable for industrial production.
收稿日期: 2014-04-18
出版日期: 2015-03-24
基金资助:国家自然科学基金;国家自然科学基金;国家高技术研究发展计划(863计划)
通讯作者:
陈金山
E-mail: cjscjs2009@sina.com
引用本文:
陈金山,李长生,曹勇. 不锈钢冷连轧轧制力显函数模型的开发与应用[J]. 中国冶金, 2015, 25(03): 6-12.
CHEN Jin-shan,LI Chang-sheng,CAO Yong. Development and application of explicit function model on rolling force for stainless steel in tandem cold rolling. China Metallurgy, 2015, 25(03): 6-12.