三坐标精密数控工作台的研发（本科毕业论文设计）.doc

摘 要

为了适应精密和超精密机械加工的要求，同时也适用于测量系统，设计出一种三坐标精密数控工作台。工作台具有X、Y、Z三个方向移动的能力，其中，X和Y方向采用SZH1010双坐标精密数控工作台，X和Y方向的行程均为100mm，搭配步距角为1.8度/步，细分步为50步的RM2424S型步进电机进行控制，脉冲当量为0.0006mm，工作台传动精度高，稳定性好，动作灵敏，热变形小，并且精确定位后工作台可靠锁紧。Z方向采用了单螺母变位导程预紧式丝杠副对X、Y双坐标工作台及其支座进行传动，主柱导轨选用了4根四方向等载荷直线滚动导轨副，Z方向的行程为70mm，并且搭配步距角为1.8度/步，细分步为50步的RM26A3S型步进电机进行控制，脉冲当量为0.0004mm，稳定性好，精度高。工作台的承载为30～35kg，在细分式步进电机的驱动下，工作台能够实现三方向的精密移动控制，能实现高定位精度和重复定位精度，基本满足精密机械加工以及测量系统的要求。

关键词： 精密，数控，三坐标工作台


ABSTRACT

To meet the sophisticated and ultra-precision machining requirements, but also applica- ble to the measurement system, design a 3-D precision CNC table. Table with X, Y, Z three directions of the mobile capability, which, X and Y coordinates of the direction of dual-use SZH1010 precision CNC table, X and Y direction of the itinerary were 100mm, with step angle of 1.8 degrees / step The breakdown for the 50-step further RM2424S s- tepper motor control, pulse equivalent to 0.0006 mm, table transmission of high accura- cy, stability, action is sensitive, heat distortion of small, precise positioning and reliable table after locking. Z direction of a single variable-nut-screw Lead pretightening of the X, Y coordinates of dual-bearing table and a transmission, main-track selection of the f- our straight load, such as the direction of rolling rails deputy, Z directions The itinerary for the 70 mm, and with step angle of 1.8 degrees / step, step for the 50-step breakdown of RM26A3S-stepper motor control, pulse equivalent to 0.0004 mm, good stability, hi- gh accuracy. Bearing the table for 30 ~ 35 kg, in the breakdown of the stepper motor- driven, three table to achieve the precise direction of movement control, to achieve high positioning accuracy and repeat positioning accuracy, precision machinery to meet the basic processing and measuring system requirements.


Key words：Precision, Digital Control, Three Coordinate Table



目 录

中文摘要 Ⅰ
ABSTRACT Ⅱ
1绪论 1
1.1 精密数控技术 1
1.1.1精密数控技术的发展 1
1.1.2国内外精密数控技术的对比 2
1.2 课题内容及主要任务 2
1.2.1精密数控工作台简介 2
1.2.2设计的主要任务 3
2总体方案设计 4
2.1 X-Y轴精密数控工作台的设计 4
2.1.1X-Y轴精密数控工作台的方案论证与分析 4
2.1.2X-Y轴精密数控工作台的控制系统 5
2.2 Z轴精密数控工作台的设计 9
2.2.1Z轴精密数控工作台的方案论证与分析 9
2.2.2滚珠丝杠的设计 10
2.2.3细分式步进电动机 22
2.2.4四方向等载荷（GGB）直线滚动导轨副 24
3 结论 29
参考文献 30