The Optimization Of Frame Parameters In Hot Strip Finishing Mill For Improving Export Shape

Study on the optimization technology of roll frame largely began in the last century80’s, it has been nearly 30 years up to now, is also a relatively new technology, from thevery beginning study of frame,roll system and rack and to the optimization analysis onwork roll and back roll profile optimization, development of this technology has come along way, and achieved remarkable results in the actual application.Scholars in China has a wealth of experience in the theoretical calculations, nowmostly using influence function method to calculate the deformation of roll system, usingvariational method to calculate the metal plastic flow, the resulting deformation of rollsystem and export thickness are very close to actual, and optimization part widely used isPowell optimization algorithm, the normal procedure is first to translate the objectivefunction by penalty function method to unconstrained function, Then with Powellalgorithm for optimization, because the defects of the algorithm itself, the optimizationprocess is slow and the result vulnerable fall into a local minimum.This article is based on the basis study of predecessors and bring some improvmentin the optimization part, through the use of the latest AMS-PSO Optimization algorithm toimprove the accuracy of the results, making it closer to the global optimal value, and makecomprehensive comparison and analysis with Powell algorithm, as a result comprehensivecomparing the advantages and disadvantages of the two, that will be helpful for the user’sselection.Use this program for a 850 mill optimization practices, verify that 850 mill meets thedesign requirements, and though stiffness, weight and other aspects to optimize it, givesome scientific advice on the 850 mill’s design,and that will be usefull for the 850 mill’smodification and other mill’s design in the furure.