论文部分内容阅读
研制了一套内渐进多焦点镜片(PAL)数控(NC)车床系统,车床系统通过采用带双CPU的开放式结构和音圈电机来实现高精密车削加工。通过对其三轴电机运动进行比例-积分-微分(PID)参数调整和误差补偿,该闭环系统的定位精度为1μm,重复定位精度为2μm。将内渐进多焦点镜片型面区分成“视近”、“视远”、“像差”和“渐变”4个区域,依次提出与其相适应的数学表述,并在此基础上开发内渐进多焦点镜片型面数据处理软件,实现内渐进多焦点镜片型面的软件离线插补,为镜面加工提供刀具控制数据。
An internally progressive multifocal lens (PAL) NC lathe system was developed that achieves high-precision turning through the use of an open architecture with dual CPUs and a voice coil motor. The proportional-integral-derivative (PID) parameter adjustment and error compensation of the three-axis motor are carried out. The positioning accuracy of the closed-loop system is 1μm and the repeat positioning accuracy is 2μm. The inner progressive multifocal lens profile is divided into four regions of “as near”, “as far as possible”, “aberration” and “gradual”, and the corresponding mathematical expressions are proposed in turn On the basis of this, the inner progressive multifocal lens profile data processing software is developed to realize the software offline interpolation of the inner progressive multifocal lens profile and provide the tool control data for the mirror processing.