砂轮离散元建模的镍基合金磨削加工数值模拟  

Grinding Wheel Modeling and Numerical Simulation in Grinding of Nickel-based Alloy via Discrete Element Method

作　　者：宋文韬 周里群[1] 李玉平[1] 彭杰[1] SONG Wentao;ZHOU Liqun;LI Yuping;PENG Jie(School of Mechanical Engineering,Xiangtan University,Xiangtan 411105,Hu′nan,China)

机构地区：[1]湘潭大学机械工程学院,湖南湘潭411105

出　　处：《机械科学与技术》2021年第5期755-761,共7页Mechanical Science and Technology for Aerospace Engineering

摘　　要：为探究镍基合金在磨削加工中的材料去除机理,采用圆弧角度随机切分法,对砂轮表层磨粒进行了轮廓、分布的几何建模;采用平行键粘结线性标定法,对镍基合金材料进行了离散元模型校准;建立了砂轮磨粒磨削镍基合金加工的动态仿真。仿真结果表明:磨削过程中,磨削力存在动态波动;磨削切向力、法向力随着砂轮表面磨粒轮廓边数增加而减小;磨削切向力、法向力随着砂轮旋转速度增加而减小,数值模拟方法和结果对镍基合金磨削加工过程材料去除机理研究具有一定参考价值。To explore the material removal mechanism in grinding of nickel-based alloy,the external profile and distribution of grits on the surface of the grinding wheel is geometrical modeled with the random arc segmentation method.By using the parallel bond bonding linear calibration method,the discrete element model for nickel-based alloy is calibrated;a dynamic simulation test of nickel-based alloy grinding is established with abrasive grains.The simulation results show that the grinding force fluctuates dynamically and the tangential force and normal force decrease with the increasing of grinding grain edges.With the increasing of grinding wheel speed,the tangential force and normal force are decreased.The simulation methods and results have a reference for studying the material removal mechanism during the grinding of nickel-based alloys.

关 键 词：镍基合金 建模 离散元 动态仿真 

分 类 号：TG74[金属学及工艺—刀具与模具]