摘要
基于单个磨粒微磨削几何运动学规律和最小值函数,推导出全局磨粒的微磨削运动轨迹表达式,建立工件微磨削加工表面的包络线函数集合,得出磨削加工微观形貌仿真预测模型,并通过开展DD5镍基单晶高温合金微磨削加工工艺实验验证模型结果的正确性.实验结果表明:仿真预测微观形貌与实际微观形貌具有相似特征,仿真预测线轮廓高度与实际加工微磨削线轮廓高度误差为0. 2~0. 3μm;不同磨削参数下的表面粗糙度对比结果也表明预测模型与实验所得的表面粗糙度变化趋势一致.
Based on the regularity of geometric kinematics for a single abrasive micro-grinding and the minimum function,the global abrasive micro-grinding trajectory expression was deduced.The envelope function set of a micro-grinding workpiece surface was established,the simulation prediction model of grinding processing microstructures was obtained,and the correctness of the model was verified by conducting the micro-grinding processing experiment of DD5 nickel-based single crystal superalloy.The experimental results showed that the simulated predicted micro-morphology has similar characteristics to those of the actual micro-morphology.The error between the simulated predicted line contour height and the actual machined micro-grinding line contour height is 0.2~0.3μm.The comparison results of surface roughness under different grinding parameters also showed that the prediction model is consistent with the experimental results.
作者
巩亚东
苏志朋
孙瑶
金丽雅
GONG Ya-dong;SU Zhi-peng;SUN Yao;JIN Li-ya(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第7期949-954,共6页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51775100)
中央高校基本科研业务费专项资金资助项目(N180303028).
关键词
微磨削
形貌仿真
微磨削轨迹
表面粗糙度
镍基单晶高温合金
micro-grinding
morphology simulation
micro-grinding trajectory
surface roughness
nickel-based single crystal superalloy
