C620 普通车床进行数控改造I / 28摘 要针对现有常规 C620 普遍车床的缺点提出数控改装方案和单片机系统 设计，提高加工精度和扩大机床使用范围，并提高生产率。本论文说明了 普通车床的数控化改造的设计过程，较详尽地介绍了 C620 机械改造部分 的设计及数控系统部分的设计。采用以 8031 为 CPU 的控制系统对信号进 行处理，由 I/O 接口输出步进脉冲，经一级齿轮传动减速后，带动滚动丝 杠转动，从而实现纵向、横向的进给运动。改造过程如下：（1）机械部分的改造，包括纵向进给方向的改造和 横向进给方向的改造。主要包括对滚珠丝杠螺母副及反应式步进电机的计 算选择及纵向、横向机构装配图方案的制定。（2）电气控制部分的设计， 主要包括MCS-51 系列单片机及扩展芯片的选用和电气控制图的设计。关键词：数控，单片机，步进电机，滚珠丝杠，改造C620 普通车床进行数控改造2 / 28ABSTRACTTo remedy the defects of ordinary lather C620, a design of data processing system and its single chip microcomputer system program is put forward to raise the processing precision and extend the machine’s usage, and to improve production rate。This paper presents the process of designing numerical control reform ， and explicitly introduces the design of mechanical and numerical control system reforms。We adopt control system which has 8031 as cpu to cope with the signal ， and output the step pulse through the I/O interface 。 After transmitting and slowing down by force 1 gear, the step pulses drive the leading screw to roll。Thus achieve the vertical movement and the crosswise movement。Reform process as follows:(1)The reformation of machine part, include to enter lengthways to the reformation of the direction with horizontal enter to direction of reformation. Mainly include to roll the ball screw shaft nut and the calculation choice of reaction stepping motor and the establishment of lengthways, horizontal organization assemble diagram project. (2)The r...
