摘要
为了提高轴承使用寿命,从微观角度研究超精加工艺参数对多晶体轴承钢表面质量的影响,构建了多晶体GCr15轴承模型,使用分子动力学软件模拟轴承的超精加工过程。将仿真得到的力热结果与表面质量指标结合分析,发现随着单颗磨粒切深的增大,磨削温度与磨削力增大,受力热影响损伤层厚度增大、位错密度减小;随着磨削速度的增大,磨削力变化很小,磨削温度上升,受温度及加工时间影响,位错密度与损伤层厚度减小。综合考虑,选用较小的切深和较大的磨削速度搭配的工艺参数组合,能获得更高的加工表面质量。
In order to improve the service life of the bearing,the influence of super-finishing process parameters on the surface quality of polycrystalline bearing steel was studied from a microscopic point of view,a polycrystalline GCr15 bearing model was constructed,and molecular dynamics software was used to simulate the super-finishing process of the bearing.Combining the simulation results of force and heat with surface quality indicators,it is found that as the depth of cut of a single abrasive particle increases,the grinding temperature and grinding force increase,and the damage layer thickness and dislocation density are increased under the influence of force and heat.Decrease;as the grinding speed increases,the grinding force changes very little,the grinding temperature rises,and the dislocation density and the thickness of the damage layer decrease due to the influence of temperature and processing time.Considering comprehensively,selecting a combination of process parameters with a smaller depth of cut and a larger grinding speed can achieve higher surface quality.
作者
钱磊
李蓓智
吕志军
QIAN Lei;LI Bei-zhi;LV Zhi-jun(School of Mechanical Engineering,Donghua University,Shanghai 201620,China)
出处
《组合机床与自动化加工技术》
北大核心
2022年第7期102-105,共4页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家重点研发项目(2018YFB1703203)。
关键词
滚动轴承
表面质量
多晶体
超精加工
工艺参数
分子动力学
rolling bearing
surface quality
polycrystalline
superfinishing
process parameters
molecular dynamics
