轴向超声振动磨削硬脆性材料表面粗糙度建模研究  

Modeling forsurface roughness of hard and brittle materials in axial ultrasonic vibration grinding

作　　者：何玉辉[1,2] 万荣桥 周剑杰 唐进元 

机构地区：[1]中南大学机电工程学院,长沙410083 [2]高性能复杂制造国家重点实验室,长沙410083

出　　处：《振动与冲击》2017年第23期194-200,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(51535012;U1604255)

摘　　要：假设磨粒切削沟槽轮廓截面为一系列顶角等于磨粒的锥顶角、深度服从瑞利分布的三角形,并考虑磨粒运动轨迹重叠效应的影响,建立了轴向超声振动磨削硬脆性材料的表面粗糙度模型。以K9光学玻璃为实验材料,对比分析了未考虑和考虑了磨粒运动轨迹重叠效应的表面粗糙度模型的拟合精度,结果表明:后者表征超声磨削表面粗糙度更接近实验结果,且超声磨削表面粗糙度模型反映的磨削参数和振动参数对表面粗糙度的影响趋势与实验结果相一致,从而验证了所建模型的正确性和有效性。Assuming the profile cross section of grain grinding grooves is a series of triangles whose vertex angle is equal to the cone angle of grinding particle and the grooves＇ depth obeys Rayleigh distribution,considering the effects of grinding particles＇ trajectories overlapping,the surface roughness model of hard and brittle materials in axial ultrasonic vibration grinding was established. K9 optical glass was taken as the test material,the fitting accuracies of the model without the overlapping effect of grinding particle trajectories and the one with this effect were analyzed contrastively. The results showed that the latter to characterize the surface roughness of ultrasonic grinding is more close to the test results;the effect trend of grinding parameters and vibration parameters on surface roughness reflected by the latter are consistent with the test results. so the correctness and effectiveness of the proposed model is verified.

关 键 词：瑞利分布 硬脆性材料 表面粗糙度 轨迹重叠 超声磨削 

分 类 号：TG58[金属学及工艺—金属切削加工及机床]