轧机压下系统螺纹副面力场的有限元分析

FE Analyzing on Stress Field in Screw Pairs of Mill Press Crew-Down System

为了改善型钢轧机压下系统中螺纹副的应力分布,提出在螺母上下表面车制环形槽的方法,并结合大型有限元软件Marc强大的非线性功能,建立了螺纹副改造前后的有限元模型。计算结果表明:螺母改造后螺纹副内的应力场分布更趋向于均匀,且降低了应力峰值,提高了压下系统的承载能力。研究成果对提高螺纹副的承载能力和材料的利用率有一定的指导意义。

In order to improve the distribution of stress field in screw-down system of typical rolling mill,the method was extracted through turned ring groove in surface up and down for nut,the FE model was established of screw pairs using powerful nonlinear function large-scale of FE software -Marc.The calculation results indicate that stress field distribution can drive to uniform,and reduce the stress peak value and improve the load-bearing capacity of crew-down system in after reformation.The research achievements can supply theory guide for increasing the load-bearing ability of screw pairs and material utilization ratio.