纵-扭超声磨削氧化锆陶瓷磨削力仿真分析

Simulation Analysis of Grinding Force in Longitudinal-Torsional Ultrasonic Grinding of Zirconia Ceramics

为揭示纵-扭超声振动对磨削氧化锆陶瓷磨削力的影响,分析纵-扭超声磨削(L-TUG)运动特性,利用ABAQUS开展单颗金刚石磨粒划擦氧化锆仿真模拟,并进行单磨粒磨削氧化锆试验验证。在此基础上,分析仿真条件下普通磨削(OG)与L-TUG材料表面应力的差异性;探讨磨削表征参数对L-TUG磨削力的影响规律。结果表明:OG与L-TUG磨削力仿真结果和试验结果吻合度较高,验证了仿真模拟的可行性;与OG相比,超声振动能够有效降低材料表面磨削应力;在相同表征参数下,整体上L-TUG轴向力始终大于法向力,且对轴向力与法向力的影响程度和变化趋势呈现不同的规律性。

In order to reveal the influence of longitudinal-torsional ultrasonic vibration on the grinding force of grinding zirconia ceramics,the kinematic characteristics of longitudinal-torsional ultrasonic grinding(L-TUG) was analyzed,a single diamond abrasive particle scratching zirconia simulation was carried out by using ABAQUS,and the single abrasive zirconia grinding test was carried out.On this basis,the difference of materials surface stress between ordinary grinding(OG) and L-TUG was analyzed under simulation conditions;the influence laws of grinding characteristic parameters on grinding force of L-TUG were discussed.The results show that the grinding force simulation results of OG and L-TUG are in good agreement with the experimental results,the feasibility of the simulation is verified;compared with OG,the grinding stress of material surface can be effectively reduced by using the ultrasonic vibration;under the same characterization parameters,L-TUG axial force is always greater than normal force on the whole,and the influence degree and variation trend of L-TUG on axial force and normal force show different regularity.