(1. Institute of Research of Iron and Steel of Jiangsu Province Shasteel, Zhangjiagang 215625, Jiangsu, China 2. General Plant of Steel Plate, Jiangsu Shagang Group Co., Ltd., Zhangjiagang 215625, Jiangsu, China)
Abstract:The out-of-tolerance of head thickness ranging from 0.2 m to 1.0 m was serious while rolling heavy plate in an 5 000 mm heavy plate production line,which greatly affected the dimensional precision and the yield rate of the plate product. The reasons for that were:the deviation of rolling force prediction was too large,and the excessive roll gap compensation at head of plate causing actual rolling gap is too small,which result in thinner head thickness,and it become more obvious with the increasing of plate aim thickness. According to the parameter optimization of the head thickness control system in L1 and the rolling force setting model in L2,after repeated experiments and industrial applications,apparent effect was obtained,the head thickness qualified rate was improved from 50% to above 90%.
郭德福,孙 林,沈 益,吕晓东,范振英. 5 000 mm宽厚板头部厚度超差原因及控制对策[J]. 钢铁, 2015, 50(11): 57-62.
GUO De-fu,SUN lin,SHEN Yi,[LU]Xiao-dong,FAN Zhen-ying. Reasons and control strategy of head thickness out-of-tolerance for 5 000 mm wide and heavy plate mills. Iron and Steel, 2015, 50(11): 57-62.
Ch.Fischer, D.Auzinger, J.Maierl..Quality and throughput improvement at the heavy plate mill of voestalpine Grobblech[J].Continuous Casting and Hot-Rolling Conference, Linz, Austria, 2004, /(/):/-/
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Ch.Fischer, D.Auzinger, J.Maierl..Quality and throughput improvement at the heavy plate mill of voestalpine Grobblech[J].Continuous Casting and Hot-Rolling Conference, Linz, Austria, 2004, /(/):/-/