CAD在滚齿机校正机构设计上的应用

利用校正机构补偿滚齿机的传动误差,可以加工出5级齿轮和蜗轮以及高精度的SG—71型蜗轮副。我们以Y3180滚齿机为对象,测出其范成传动链综合误差曲线,利用FFT程序得到传动误差频谱图,找出传动链中影响误差的因素和大小,并以此为根据利用CAD技术设计校正机构:校正凸轮及其摆杆,校正偏心齿轮组件等,从而降低了低频误差和短周期误差。 这种方法能应用于SG—71型蜗杆倒坡加工机构的凸轮设计,使入口和出口的例坡在一次磨削中完成,提高了生产率,如与偏心齿轮组合,还可以补偿短周期误差,提高SC—71型蜗轮副的工作平稳性。

Application of CAD in Design of Correcting Mechanism of Hobbing Machine

The hobbing machine can hob components such as gears and worm gears with 5 grade accuracy and high accuracy SG-71 worm gearing, if it is provided with the correcting mechanism to compensate its transmission error. We have measured the composition error of the generating gearing chain on the Y3180 hobbing machine, have used FFT program to obtain the frequency spectrum figure, have found out sourc.es of several errors and magnitude of their effects.And then according to these factors we have designed the corre- cting mechanism, which consists of the correcting cam, the swing arm of the cam and the correcting eccentric gear unit,by using CAD technology. This results in the reduction of lowfrequency error and short-period error.This method can be applied to design the cam of the relieving mechanism of SG-71 worm, so that the inlet relieving and the outlet relieving can be ground in one operation, the production rate can be raised. The short-period error can be compensated and the working stability of SG-71 worm gearing can be increased, if the correcting eccentric gear unit is used.