Research On The Elongation Control System Of 2230 Continue Annealing Line Skin Pass Mill

This paper relies on SPM of Jingtang 2230 continuous annealing line,describes the formation process and equipment,to the SPM for the study,research SPM elongation control system that combines control theory,theory and rolling production line problems,traditional SPM elongation mathematical model derived by the line and rolling force-elongation model and tension-elongation model simulation.For field production appears elongation fluctuations and other issues affecting research tension,speed and rolling force to elongation and explained,elongation control technology research and gives effective solutions to improve the quality of products has a great guiding significance.The main contents of this paper include:(1)Introduced Jingtang SPM elongation control structure of the system;and then gives SPM elongation control modes;elongation rolling force control mode and the elongation tension control mode;deduced mathematical two modes model,in the form of transfer function to represent;to SPM elongation control modes to simulate and optimize the PID controller parameters elongation,elongation study tracking performance,extend the time before the former comparison Add speed feed-forward and feed-forward speed not added rate tracking performance.(2)Adjusted SPM test parameters,analyze the influence of elongation of the impact of the three main parameters;by Speed-former Fed elongation research,adding feed-forward model program in a control system,the successful resolution lifting speed elongation fluctuations.Speed down a turning point for the elongation of abnormal fluctuations,tension adjustment through several tests to obtain tension on the influence of elongation,tensile proposed optimization principles.(3)For mild steel rolling force easier to achieve a minimum system problems found by testing SPM rolling force controllable range,on the basis of no damage to equipment,the rolling force expansion;by optimizing the control procedures,minimum rolling force 0.6 MN smooth,controlled expansion of the scope of the rolling SPM force,thereby broadening the scope of control of elongation.In this paper,through the work of Shougang Jingtang 2230mm Annealing SPM production line process control parameters and models were optimized to reduce rolling smooth fluctuations in the process of elongation,improve the quality of cold-rolled flat steel products.