已知条件：

² 最大铣刀直径为32mm；

² 最大铣削宽度为16mm；

² 最大铣削深度为6mm；

² 加工材料为碳钢；

² 工作台加工范围 300mm×900mm；

² 最大移动速度为3m/min

定位精度：±0.01mm，滚珠丝杠及导轨使用寿命：T=20000h，中等冲击

摘  要

本全面阐述了数控铣床的结构原理，设计特点，论述了采用伺服电机和滚珠丝杠螺母副的优点。详细介绍了数控铣床的结构设计及校核，并进行了分析。另外汇总了有关技术参数。

其中着重介绍了滚珠丝杠的原理及选用原则，系统地对滚珠丝杠生产、应用等环节进行了介绍。包括种类选择、参数选择、精度选择、循环方式选择、与主机匹配的原则以及厂家的选择等。

关键词：铣床，数控，伺服电机，滚珠丝杠

Abstract

Elaborated comprehensively the numerical control CNC planer type milling machine's structure principle, the design feature, elaborated has used step-by-steps the electrical machinery and the ball bearing guide screw nut vice-merit. Introduced in detail the numerical control CNC planer type milling machine's structural design and the examination, and have carried on the analysis. And has compiled the related technical parameter.

In which introduced emphatically the ball bearing guide screw principle and selects the principle，To ball bearing links and so on guide screw production, application has systematically carried on the introduction. Including the type choice, the parameter choice, the precision choice, the round-robin mode choice, the principle as well as the factory choice which matches with the main engine and so on.

Key Words:  milling machine, Numerical control, Step-by-step, serve motor, Ball bearing guide screw nut