螺旋锥齿轮虚拟加工及有限元分析

VIRTUAL MACHINING AND FINITE ELEMENT ANALYSIS OF SPIRAL BEVEL GEAR

根据传统式机床的结构特征和运动原理,用Catia对螺旋锥齿轮进行虚拟加工,通过和理论模型对比加工精度,证明建模的合理性和精准性。用Hypermesh对齿轮进行网格划分,导入Abaqus中进行有限元分析,提取传动误差曲线和接触线。随着载荷的增大,齿轮的传动误差波动幅值随之减小,但偏离零线的幅度随之增大,表明螺旋锥齿轮在载荷增大的情况下传动更加平稳,传动精度随之降低,这和螺旋锥齿轮动态特性相吻合,表明虚拟加工齿轮的性能良好。当虚拟加工形成的齿轮在有限元分析中的接触性能和传动误差曲线不太理想时,可以根据修正等原理在Catia中调整机床调整参数并重新加工齿轮,在分析中发现重构齿轮的接触性能和传动性能得到提高。在Catia仿真加工时可以人为加入误差,为有限元分析有误差齿轮提供模型,方便人们研究有误差齿轮的动态特性。在齿轮设计阶段采用有限元法研究齿轮的接触性能和传动特性,从而对虚拟加工齿轮的质量进行预知与评价,分析齿轮性能和机床调整参数之间的联系,对螺旋锥齿轮的机床调整参数进行反调起到重要作用。

According to the structure characteristics and motion principle of traditional machine tools,the spiral bevel gear is virtual machined by Catia.By comparing the machining accuracy with the theoretical model,the rationality and accuracy of the modeling are proved.Hypermesh is used to mesh the gears,which is imported into ABAQUS for finite element analysis to extract the curve of transmission error and contact wire with the increase of load,the amplitude of transmission error fluctuation decreases,but the amplitude of deviation from zero line increases.It shows that the transmission of spiral bevel gear is more stable and the transmission accuracy decreases with the increase of load,which is consistent with the dynamic characteristics of spiral bevel gear,indicating that the performance of virtual machining gear is good.When the contact performance and transmission error curve of the gear formed by virtual machining are not ideal in the finite element analysis,according to the principle of modification,the machining parameters can be adjusted and gear is reprocessed in Catia.The contact and transmission performance of the reconstructed gear can be improved in the analysis.In Catia simulation machining,the error can be added artificially to provide a model for the finite element analysis of the gear with error,which is convenient for people to study the dynamic characteristics of the gear with error.In the gear design stage,the finite element method is used to study the contact performance and transmission characteristics of the gear,so as to predict and evaluate the quality of the virtual machining gear,analyze the relationship between the gear performance and the adjustment parameters of the machine tool,and play an important role in the reverse adjustment of the processing adjustment parameters of the spiral bevel gear.