弧齿锥齿轮喷丸表面微观形貌仿真与试验验证  

Simulation and Experimental Verification of Microscopic Surface Morphology of Spiral Bevel Gears by Shot Peening

作　　者：廖祥贵 吴昊[2] 唐进元[2] 赵久越 Liao Xianggui;Wu Hao;Tang Jinyuan;Zhao Jiuyue(AECC ZhongChuan Transmission Machinery Co.,Ltd.,Changsha 410200,China;State Key Laboratory of Precision Manufacturing for Extreme Service Performance,Central South University,Changsha 410083,China)

机构地区：[1]中国航发中传机械有限公司,湖南长沙410200 [2]中南大学极端服役性能精准制造全国重点实验室,湖南长沙410083

出　　处：《机械传动》2024年第8期97-103,共7页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(U22B2086)。

摘　　要：喷丸强化工艺能在弧齿锥齿轮表面及次表面引入残余压应力场,提高其疲劳寿命;但工程应用中经常出现不适当的喷丸参数,导致齿轮表面粗糙度显著增加,影响了齿面制造质量。为了准确预测与调控喷丸后齿轮表面微观形貌及表面粗糙度,基于离散元和有限元耦合的方法,提出了一种弧齿锥齿轮齿面喷丸工艺仿真计算方法,表面粗糙度预测与实测误差在20%以内,表明仿真预测方法具有准确性。基于该方法,以某弧齿锥齿轮为研究对象,研究了不同喷丸工艺参数与喷丸后齿面微观形貌的关联规律。研究结果表明,①随着喷丸时间增加,齿面三维粗糙度Sa先显著增加后缓慢下降;②当喷丸时间为50 s时,在本文的工艺参数下能达到满覆盖率;③弹丸速度与弹丸直径对齿面粗糙度均有较大的影响,但弹丸直径的影响更为显著。研究工作为喷丸后弧齿锥齿轮表面的微观形貌准确数值模拟与预测提供了方法基础,为合理制定喷丸工艺参数提供了技术参考。The shot peening strengthening process can introduce residual compressive stress field on the surface and subsurface of spiral bevel gears to improve their fatigue life.However,inappropriate process parame⁃ters can cause a significant increase in gear surface roughness,which has an adverse effect on the contact perfor⁃mance of the tooth surface.In order to accurately calculate the microscopic morphology and surface roughness of the gear surface after shot peening,this study proposes a spiral bevel gear tooth surface shot peening simulation model based on a coupled discrete element method and the finite element method.The prediction error of the model is within 20%,which illustrates the accuracy of the simulation prediction model.Based on this model,the correlation law between different shot peening process parameters and the microscopic morphology of the tooth surface after shot peening is investigated with a spiral bevel gear of a certain model as the research object.The results of the study show that:the three-dimensional roughness Sa of the tooth surface increases significantly and then decreases slowly as the shot peening time increases.When the shot peening time is 50 s,the full coverage can be achieved by the process parameters in this study.Both shot velocity and shot diameter have a greater ef⁃fect on the roughness of the tooth surface,but the effect of shot diameter is more significant.The research work in this study provides a new method for accurate numerical simulation and prediction of the microscopic mor⁃phology of the spiral bevel gear surface after shot peening,and provides technical support for the reasonable for⁃mulation of shot peening process parameters.

关 键 词：弧齿锥齿轮 喷丸强化 微观形貌 离散元方法 有限元方法 

分 类 号：TH132.41[机械工程—机械制造及自动化] TG668[金属学及工艺—金属切削加工及机床]