摘要
喷丸加工诱导零件表面产生残余压应力场以提高零件疲劳寿命,是螺旋锥齿轮的关键强化工艺。为准确计算喷丸后齿面残余应力场,基于离散元与有限元耦合的方法提出一种螺旋锥齿轮喷丸工艺计算仿真模型。模型计算结果与试验结果误差在10%以内,表明模型可准确预测齿面残余应力分布。基于该模型,以AISI 9310材料螺旋锥齿轮为研究对象,探讨了喷丸工艺参数与残余应力场特征参数的关联规律。研究发现,本文所用工艺参数加工:(1)喷丸工艺主要影响轮齿表层50μm内的残余应力场;(2)喷丸覆盖率为200%时,弹丸直径和速度的改变,对表面残余压应力影响较小;(3)当弹丸速度和直径提高时,靶板表层最大残余压应力值和最大残余压应力深度都得到明显提高,其中最大残余压应力值可提高到–1251.5 MPa,最大残余压应力深度可提高到40μm。本文建立的残余应力计算模型为螺旋锥齿轮的喷丸工艺参数优选提供了计算工具与方法,把依赖试错迭代的工艺方法上升到可计算、可预测的层面。
As a key process for spiral bevel gears,shot peening process induces residual compressive stress field on parts surface and improve their fatigue strength.In order to accurately calculate the residual stress field of the tooth surface after shot peening,we established a simulation model for the shot peening process of spiral bevel gears,which based on the coupling of discrete element method and finite element method.The errors between the simulated results and the experimental results are within 10%,which means the model can predict the residual stress distribution well.The correlation law between the shot peening process parameters and the residual stress distribution of AISI 9310 spiral bevel gear is investigated.The results show that under the processing parameters used in this paper,shot peening mainly affects the residual stress field from the surface of the target to a depth of 50μm.When the coverage is 200%,the increase of shot diameter and velocity works little on the surface residual compressive stress.The maximum residual compressive stress will increase to–1251.5 MPa and the depth of maximum residual compressive stress increases to 40μm with the increase of shot velocity and diameter.The residual stress calculation model established in this paper provides a tool for the optimization of shot peening parameters of spiral bevel gears,and makes the process calculable and predictable instead of the trial-and-error method.
作者
郭敏智
邓明明
姜婷婷
刘景琳
唐进元
GUO Minzhi;DENG Mingming;JIANG Tingting;LIU Jinglin;TANG Jinyuan(AECC Zhongchuan Transmission Machinery Co.,Ltd.,Changsha 410200,China;State Key Laboratory of High-Performance Complex Manufacturing,Central South University,Changsha 410083,China)
出处
《航空制造技术》
CSCD
北大核心
2023年第8期110-116,共7页
Aeronautical Manufacturing Technology
基金
国防基础科研计划资助(JCKY2020213B006)
国家科技重大专项(2019–Ⅶ–0017–0158)。
关键词
螺旋锥齿轮
喷丸强化
残余应力
离散元方法
有限元方法
Spiral bevel gear
Shot peening
Residual stresses
Discrete element method
Finite element method
