四轴球体研磨机的研磨均匀性  

Lapping uniformity of four-shaft-ball lapping machine

作　　者：程相文[1,2] 林福严[1] 孙新民[2] 

机构地区：[1]中国矿业大学,北京100083 [2]河北理工大学,河北唐山063009

出　　处：《光学精密工程》2009年第12期3022-3027,共6页Optics and Precision Engineering

基　　金：国防科工委十一五预研课题资助项目(No.51309050202)

摘　　要：为了分析四轴球体研磨机的研磨去除量,建立了四轴球体加工时的力学模型,分析了四研具在空间位置的几何关系和加工球与四研具之间的运动关系,给出了研具上的一点相对加工球的速度矢量。在Preston方程基础上,建立了四轴球体研磨机实现球面均匀研磨的分析模型,并应用Matlab软件对单位时间去除量进行仿真分析。以离散化的旋转角为变量,间距取0.01°,采用方差为指标评价研磨去除量的均匀性。分析结果显示,研磨去除量与角速度成线性关系,研具改变转向的相位角为90°时方差最小,研磨过程中不断改变四个研具的旋转方向,可获得好的研磨均匀性。实验结果表明,四轴球体研磨机是高精密加工非常有效的方法。In order to analyze the lapping quantity of four-shaft-bali lapping machines, a mechanical model was developed when the machine was in operation,and the geometric relation of the four lapping cups in space positions and the movement relation between the machining sphere and the four lapping cups were analyzed. Then, the velocity vector of relative machining sphere at one point of the lapping cups was obtained. An analyzing model for the lapping machine to realize uniform lapping on a ball surface was set up based on the Preston equation. And the Matlab software was used to conduct the simulation analysis of the lapping quantity on the unit time. By taking a discretized revolution angle as the variable and setting its intervals for 0.01°,the lapping uniformity was evaluated with the variance. The analzed results show that the lapping uniformity has linear relationship with the angle speed. When the cups change the phase angle of the turning direction as 90°, the variance is the smallest. It suggests that by changing the running ty can be obtained. Using the four-sha sion machining. direction of four cups continously,a excellent lapping uniformi ft-ball lapping machine is a quite effective method in high-precision machining.

关 键 词：四轴球体研磨机 均匀性 仿真 

分 类 号：TG749[金属学及工艺—刀具与模具]