基于DEFORM有限元仿真的弧齿锥齿轮热处理过程残余应力与变形分析

Analysis of the Residual Stress and Deformation of Spiral Bevel Gear Heat Treatment Process based DEDORM Software Finite Element Simulation

基于传热学基本原理和热弹塑性理论,采用有限元方法,建立了弧齿锥齿轮热处理分析模型,利用DEFORM软件模拟了渗碳淬火工艺对轮齿残余应力分布和变形量的影响,得到了渗碳淬火过程中微观组织、齿面残余应力和轮齿变形随时间的变化规律,并研究了不同淬火温度对轮齿残余应力、变形及抗疲劳性能的影响规律。仿真结果表明,热处理后轮齿齿面形成压应力,芯部形成拉应力,随着淬火温度的升高,残余压应力增大,这有利于改善弧齿锥齿轮的疲劳特性和使用性能,同时轮齿齿面变形量的分析能够为后续的弧齿锥齿轮磨削加工工艺参数的确定提供一定的理论指导。

Based on the basic principles of heat transfer and thermal elastic- plastic theory,by using finite element method,the heat treatment analytical model of spiral bevel gear is established. The influence of carburizing quenching process on tooth residual stress distribution and deformation is simulated by DEFORM software. The variation law of microstructure,residual stress and tooth deformation with time in the carburizing quenching process are obtained. The influence of different quenching temperature on tooth residual stress,deformation and performance is researched. The simulation results show that the compressive stress on tooth surface and the tensile stress on core portion are formed after heat treatment. The tooth surface residual compressive stress is increased with the quenching temperature. This can improve the fatigue property and performance of spiral bevel gear. The analysis of tooth surface deformation can provide certain theoretical guidance for the subsequent spiral bevel gear grinding process parameter.