轧辊磨床整机动态性能实验分析与仿真

Simulation and Experimental Analysis on Dynamic Characteristics of the Roll Grinde

摘要: 对高精度轧辊磨床进行了模态测试及动态性能分析，建立了该轧辊磨床的有限元仿真模型。研究了滑动导轨、滚珠丝杠、轴承以及地脚螺栓等磨床结合部的动态特性，通过在ANSYS软件中添加弹簧阻尼单元，简化了结合部的仿真。实验与仿真结果的对比分析表明，磨床头架、砂轮架、支撑架的振动对加工精度影响较大；轧辊磨床在动态分析时必须考虑工件的影响；利用加权分布的弹簧阻尼单元进行结合部建模的方法简单有效；提出的轧辊磨床动态性能分析流程有一定可行性。

Abstract: The modal test and dynamic characteristic analysis of high accuracy roll grinder were carried out. By establishing the finite element model, dynamic characteristics of joints on sliding guides, ball screws, bearings and anchor bolts were studied. The spring-damper element, which simplified simulation of joint characteristics, was added to the model in ANSYS software. Simulation and ex-perimental results indicate that the vibration of head frame, grinding carriage and center rack in-fluences machining accuracy most; influences of the workpiece must be considered when analyzing dynamic characteristic; the weighted spring-damper element method is useful to build joint model; the proposed process is feasible for evaluating the roll grinder’s dynamic characteristic.