（毕业设计论文）《最大加工直径为400毫米的经济型数控车床进给系统设计》.doc

本科毕业设计任务书 题目：最大加工直径为400毫米的经济型数控车床进给系统设计 学院： 南昌大学 姓名： 刘婷 专业： 机械设计及其自动化 指导老师： 二0一一年四月 摘要 此设计是经济型中档精度数控车床横向进给系统 。面对我国目前机床数量少、工业生产规模小的特点，突出的任务是用较少的资金迅速改变机械工业落后的面貌。而数控车床（及其系统）已经成为现代机器制造业中不可缺少的组成部分。所以，实现这一任务的有效的、基本的途径就是普及应用经济型数控机床。 进给系统是由伺服电机经滚珠丝杠拖动工作台来完成的所以设计涉及伺服电机的选择，滚珠丝杠设计等。目前绝大部分的机床的横向进给均是采用滚珠丝杠来传递运动的，传动的精确性主要取决于丝杠支承形式，丝杠与伺服电机的联接方式。在设计中充分考虑到这两个问题，并且，设计精度须达所给数据。 AbstractThis design is the feeding operation of numerical control lathe with economic type of intermediate precision In view to the quantity of machine tools in our country is not enough and the scale of industrial production is little at present, the outstanding task is to change our mechanical industrial appearance with less fund in short order.And the numerical control lathe and its system have become an important part in modern manufacturing industry.So, to realize this task, the effective and the basic channel is to use this economic type of numerical control lathe widely.Feeding system goes normally with the ball screw which is droved by servo-motor dragging the workbench up and down.So, this design includes the option of servo motor, the design of ball screw and so on.Now, the landscape orientation feeding of most machine tools is offered by ball screw. The accuracy of the transmission depends on mainly the form of the screw supports and the way of how screw and servo-motor to be joined. Besides the precision of the design needs Bases the primal data.Consider these two questions in the design sufficient.Keyword: holler-type thread Servo motor landscape orientation 目 录 摘要………………………………………………………………………………………2 Abstract……………………………………………………………………………………2 第一章 概述………………………………………………………………………………3 1.1 数控车床的概念……………………………………………………………………3 1.2 数控车床的组成和特点………………………………………………………………4 1.3 经济型数控车床的发展与趋势与现状………………………………………………5 1.4 数控机床系统的选择…………………………………………………………………6 1.5 数控机床设计中主要机械部分……………………………………………………7 1.6 数控机床的性能和精度选择………………………………………………………8 第二章 进给系统总体方案设计……………………………………………………………………9