Variable thickness rolling technology and application for head of aluminum hot rolling strip
XU Lei1, JIANG Ting2, LI Xiao-hui3
1. School of Mechanical and Traffic Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, China; 2. Power Institute, Liuzhou Railway Vocational Technical College, Liuzhou 545006, Guangxi, China; 3. Guangxi Liuzhou Yinhai Aluminium Co. ,Ltd. , Liuzhou 545006, Guangxi, China
Abstract：The head compression injury is one of the main quality defects that affect the yield of aluminum alloy hot rolled strip. In order to effectively control the occurrence of the defect,firstly,the causes and mechanism of the defect were analyzed,and the solution of changing the roll gap of each stand in turn to roll the head of the coil in variable thickness rolling was determined. The mathematical model of variable thickness rolling process was established,which could calculate the adjustment amount and adjustment speed of the roll gap of each stand in real time,so as to increase the indirect contact surface between the head of the coil and the inner coil and reduce the head crush defect of the coil. After using this method in the production site,the bad ratio of head crush is reduced from 5% to 1%,and the maximum allowable coiling thickness of coiler can be increased.
许磊, 蒋婷, 李晓辉. 铝带热连轧头部变厚度轧制工艺和应用[J]. 中国冶金, 2020, 30(7): 46-49.
XU Lei, JIANG Ting, LI Xiao-hui. Variable thickness rolling technology and application for head of aluminum hot rolling strip[J]. China Metallurgy, 2020, 30(7): 46-49.
2020, Vol. 30 
