精密轴承磨削金刚滚轮修整工艺优化研究  

Study on the Optimization of Dressing Process of Diamond Wheel for Precision Bearing Grinding

作　　者：迟玉伦[1] 顾佳健 CHI Yu-lun;GU Jia-jian(University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学,上海200093

出　　处：《表面技术》2021年第3期366-375,共10页Surface Technology

摘　　要：目的通过对轴承套圈表面修整工艺优化的研究,实现对轴承套圈表面优质高效的磨削加工。方法首先基于金刚滚轮修整原理和力学原理,建立修整过程系统简化模型,根据模型求得系统固有频率,再根据频响函数曲线图确定主轴最佳转速。然后建立砂轮与滚轮的运动轨迹方程,根据方程求得曲率半径,再根据曲率半径求得使砂轮表面粗糙度较低的修整速比。接着引入一个新的物理量干涉角,根据经验确定一个较优的干涉角,将修整速比代入,求得最后的滚轮进给速度。最后通过间接获得的磨削力大小来优化整个修整过程,若磨削力偏大,则重新选择主轴转速。结果根据该方法得到优化结果,选用砂轮转速为23994 r/min、滚轮转速为5473 r/min、修整进给速度为1.77 mm/min、磨削力为37.2 N时,轴承套圈表面能获得较高的质量。对比优化前后轴承套圈沟形,由优化前的不合格变为优化后的合格,有了显著的改善。结论将修整参数运用多个方法进行确定,并通过磨削力进行最后的优化。根据加工产品表面呈现出的问题,可以找到对应的参数,进而对参数进行单独优化,为企业优化轴承套圈表面质量提供了一套科学有效的方法。Through the study on the optimization of the surface dressing process of the bearing ring,high-quality and efficient grinding of the bearing ring surface is achieved.Based on the diamond wheel dressing principle and mechanical principle,this paper establishes a simplified model of the dressing process system to obtain the natural frequency of the system and determine the optimal speed of the spindle according to the frequency response function curve;builds the trajectory equation of the grinding wheel and the wheel to obtain the radius of curvature,and the dressing speed ratio that makes the surface roughness of the grinding wheel lower according to the radius of curvature;then introduces a new physical quantity interference angle,determines an optimal interference angle based on experience,and substitutes the dressing speed ratio to obtain the final feed rate of the wheel;finally,optimizes the entire dressing process by the size of the grinding force obtained indirectly,and reselects the spindle speed if the grinding force is too large.According to the optimization results obtained by this method,when the grinding wheel speed is 23994 r/min,the wheel speed is 5473 r/min,the dressing feed speed is 1.77 mm/min,and the grinding force is 37.2 N,the bearing ring surface will be in higher quality.Compared with the groove shape of the bearing ring before and after optimization,it is changed from the unqualified before the optimization to the qualified after the optimization,so there is a significant improvement.The dressing parameters are determined by multiple methods,and finally optimized by grinding force.And according to the problems presented on the surface of the processed products,the corresponding parameters can be found,and then optimized individually,which provides a scientific and effective method for the enterprise to optimize the surface quality of the bearing ring.

关 键 词：精密轴承磨削 金刚滚轮修整 频响函数 修整速比 干涉角 工艺优化 

分 类 号：TG58[金属学及工艺—金属切削加工及机床] V261.25[航空宇航科学与技术—航空宇航制造工程]