Full-length model with multi-point settings for finishing rolling

摘要

Thickness,width,temperature,and profile are considered as control targets in process control of hot strip finishing rolling. The pre-calculated settings of the model information include rolling force,cooling water flow between stands,bending force,and roll shifting position. Without changing the load distribution,the interaction among thread speed,rolling force,rolling power,and cooling water flow between stands is comprehensively considered based on the quantifiable relationship among speed,force,and temperature. This paper proposes a full-length multi-point-setting model that uses the settings of strip head to combine the rolling speed diagram with the target finishing mill delivery temperature( FDT) to achieve the calculation of the control parameters along full length of strip. Traditional models cannot effectively predict rolling force of strip body or the maximum and minimum temperatures of FDT. It is also difficult for traditional models to suppress fluctuations in shape accuracy of full-length strip or improve the shape accuracy of the product. Calculation results show that the proposed full-length multi-point-setting model can provide the control parameters for temperature and rolling-force over full length of strip,predict the risk of rolling exceeding the equipment capability,and improve the shape accuracy and rolling stability of hot-rolled products.