Dynamic Simulation And Optimization Of LG730 Cold Rolling Mill Main Drive System

With the development of the machinery on precise and high speed, dynamic balancing problem of main drive system of the cold rolling mill has become the key issue to be solved about the modern cold rolling mill. In view of research results related to the dynamic balancing technology of slider-crank mechanism, this paper for LG730 cold rolling mill main drive system, studies the dynamics performance of the system and the dynamic balance optimization.Taking LG730 mill as research object, this paper combines Solid Works and ADAMS to multi-body dynamics modeling about cold rolling mill. With the simulation calculation analysis, we can obtain the dynamic characteristics of the cold rolling mill main drive system which considers rolling resistance, and the dynamic characteristics include system forces on inertial force, crankcase, crankshaft input torque, etc.; Then the paper explores the influence on the main drive system dynamic performance under only the crankshaft counterweight and increase in weight, balance shaft weight three conditions, and carry comparative analysis results to describe balancing effect on weight and balance biaxial main transmission system; Also explores the balance fan-shaped dollop of phase and crankshaft speed mill inertia force of the system. By analyzing the simulation results find balance fan-shaped dollop best phase Angle, and the paper verifies that the LG730 counterweight design is reasonable. What’s more, Mill at work need to be controlled the rotational speed of the crankshaft in order to avoid a greater inertia impact.Based on the characteristics that ABAQUS can carry on dynamics analysis of multi-body system, simplify model mill reasonably and establish a multi-body dynamics finite element analysis model of cold-rolled tubes to analyze dynamic stress of key components crankshaft and connecting rod rolling mill, then find out stress concentration region within a period and evaluate its strength, and put forward reasonable proposals to improve the optimization of parts; Find the corresponding crankshaft and connecting rod mill maximum equivalent stress values within a period by changing the structure of the rolling mill equipment, then contrast and analyze to illustrate the impact of the counterweight on the crankshaft and connecting rod mill dynamic stress.Finally, treating LG730 cold rolling mill drive mechanism as an object, consider the force of inertia of the system, crankcase side reaction force and the crankshaft input torque balancing to optimize performance as the three indicators, and use particle swarm intelligence algorithm for real-time optimization. The purpose are obtaining optimal balance parameter and achieving overall optimization results of body system.