金刚石油石超精加工氧化锆陶瓷轴承沟道的仿真与实验研究

用ABAQUS软件建立金刚石油石超精加工氧化锆陶瓷轴承沟道有限元模型，分析其加工机理，并利用金刚石油石对氧化锆轴承沟道进行超精加工，获取超精加工后沟道表面粗糙度及表面形貌，研究超精加工应力对氧化锆轴承沟道表面质量的影响。结果表明:工件切线速度由150 m/min增加到450 m/min，表面应力减小，表面粗糙度值由0.091 2 μm下降到0.059 3 μm，随后增大；油石压力由0.2 MPa增加到0.8 MPa，表面应力增大，表面粗糙度值由0.194 2 μm下降到0.032 2 μm；当金刚石油石的长、短行程摆动速度增加，轴承沟道表面应力增大，其表面粗糙度值分别由0.071 6 μm增加到0.085 8 μm和0.062 7 μm增加到0.100 8 μm。适当提高工件切线速度、油石压力、长行程摆荡速度，降低短行程振荡速度有助于改善加工质量。 

Simulation and experimental study on diamond stick superfinishing bearing raceway made of zirconia ceramic

Finite element model of zirconia ceramic bearing raceway superfinishing with diamond stick was established by ABAQUS software, and its machining mechanism was analyzed. The surface roughness and surface morphology of the raceway after superfinishing were obtained by finishing zirconia ceramic bearing raceway with diamond stick. The effect of superfinishing stress on surface quality of zirconia ceramic bearing raceway was studied. The results show that as the tangential velocity increases from 150 m/min to 450 m/min, the surface stress decreases and the surface roughness decreases from 0.091 2 μm to 0.059 3 μm and then increases. As the stick stress increases from 0.2 MPa to 0.8 MPa, the surface stress increases, and the surface roughness decreases from 0.194 2 μm to 0.032 2 μm. When the swing speed of long and short stroke of diamond stick increases, the surface stress of bearing raceway increases, and the surface roughness increases from 0.071 6 μm to 0.085 8 μm and 0.062 7 μm to 0.100 8 μm, respectively. It is helpful to improve the machining quality by properly increasing the tangential speed, the stick pressure and the long-stroke swing speed of the workpiece and reducing the short-stroke swing speed.