计算机控制高精度磨齿机设计研究

Research on the Design of High Precision Gear Grinder Controlled by Computer

为克服基圆展开法锥面砂轮磨齿机换向带来的传动误差及磨削速度变化大的问题,在工件轴上设置一个附加旋转运动和工作台直线运动的伺服驱动环节,把一个变化控制的机械运动分解为常量与变量的合成,常量部分通过刚性传动链实现无误差运动匹配,变化量部分由伺服系统调节,使产生的传动误差比例份额变小,提高了系统的整体传动链精度。磨削时的展成过程运动均匀,机床调整方便,机械传动系统中无高难技术,结构简单,易保证高的机床制造精度,成本低。

The defects of cone-shaped gear grinder based on base circle generating method were overcome. With the help of servo driving tache, which produces additional revolving movement and straight movement of the worktable, the mechanical movement controlled by variability was separated into the constant and variable synthesize. The constant realizes the non-error match of movement by rigid transmission chain, and the variable adjustment by servo system reduces transmission errors. It improved the accuracy of all transmission chain. The problems of transmission errors produced by changing-direction of mechanical gear grinder were solved and large change speed when grinding was eliminated and the generating process was evened. The generating process of gear-grinder was automatically realized by speed-ratio adjustment of two servo driving taches. Due to convenient adjustment of machine tool, the structure is simple, and there are no very difficult technologies in mechanical transmission system. The high manufacturing accuracy is not only satisfactory but also the cost is low. It is of ultimate significance in high accuracy gear manufacturing field.