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本次设计以凸轮专用数控工作台及控制系统设计为选题，设计一数控工作台，工作台具有一移动轴和一转动轴，两轴具有联动功能，工作台装在普通立式铣床上，用于加工盘形凸轮的型面。回转工作台换位凸轮装置，包括传动轴、基体、换位段和定位块，定位块安装在基体上，基体装在传动轴上，换位段与基体为一体式结构。通过将定位块与基体、换位段做成分体式结构，可以使加工变的简单，可以用普通的设备加工出符合精度要求的凸轮，替代在昂贵的多轴加工中心以及坐标磨床上进行曲线的精密加工；其最大加工直径500mm，最大加工厚度150mm，加工精度±0.01mm，粗糙度3.2 m；同时，具有装配方便和磨损后可以更换的优点，大幅度降低了生产制造成本，用最简单的方法解决了非常复杂的制造难题。
根据毕业设计任务书中工作台技术要求要求，拟定工作台机械传动方案，完成机械关键零部件设计与计算、绘制装配图、和部分零件图；完成以MCS-51单片机控制的数控工作台设计，绘制控制系统原理图。同时根据机械部分设计计算，电机及关键零部件选型计算，控制系统芯片选择等，数控工作台电气原理图的绘制。
关键词：凸轮；数控；回转工作台；控制系统；原理图
This design takes the special cnc workbench and the control system design as the topic，designs a cnc workbench，the workbench has one moving shaft and one turning shaft，the two axes have the linkage function，the workbench is installed on the ordinary vertical milling machine，which is used to process the type surface of the disc-shaped cam. The rotary table transposition cam device，including the drive shaft，the matrix，the transposition section and the positioning block，the positioning block is mounted on the matrix，the matrix is mounted on the transmission shaft，and the transposition section and the matrix are integrated structure. By using the positioning block and the matrix and transposition section as the component structure，it can make the machining become simple，and the cam which meets the precision requirement can be processed with the common equipment instead of the expensive multi-axis machining centers as well as coordinate grinders for the precision processing of curves；its maximum machining diameter 500mm，maximum machining thickness 150mm，machining precision ±0.01mm，and roughness 3.2m；meanwhile，it has the advantages of easy assembly and replaceable after wear，which greatly reduces the manufacturing cost and solves the very complex manufacturing problems with the simplest method.
According to the technical requirements of the workbench in the graduation design task book，draw up the mechanical transmission scheme of the workbench，complete the design and calculation of the key parts of the machinery，draw the assembly drawing and part of the part drawing，complete the design of the NC system controlled by MCS-51 single chip microcomputer，and draw the schematic diagram of the control system. At the same time according to the mechanical part design calculation，motor and key parts selection calculation，control system chip selection，NC system electrical schematic drawing.
Keywords: cam；numerical control；rotary table；control system；schematic diagram
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