摘要随着时代的进步工业的发展，工业也在不断的发展，不断的更新。从老式的机床，到现在已经更新换代成数控机床，在数控机床中有数控车床和加工中心两种。我这次做的毕设时数控车床的进给系统的设计。在数控车床进给系统系统中刀具会沿两个方向，一个是轴向也就是Y方向，另一个是径向也就是X方向。数控机床是一个由不同构件组成的一个系统，是一个机电一体化设备。数控车床的简称是CNC，也就是所谓的实现计算机数字化控制，再也不需要人工手动操作，只需在电脑前编写相应的程序，然后输入数控车厂。它会全自动的生产出我们想要的工件。并在在这其中数控车床是由不同的部分组成的其中一个也是重要的一个是伺服加工系统。然后是伺服电动机，负责传动的丝杆螺母等等。这次设计的数控机床的进给系统，所以需要先确定使用的伺服电动机，然后是这次传动工件丝杆螺母的设计，是关于整个数控车床加工精度的一个重要组成部分，然后是导轨的设计，这关于整个数控机床加工时时候的载荷和摩擦力。68746

毕业论文关键词   数控车床；传动系统；丝杆螺纹：导轨

Abstract

   Along with the progress of the era of the development of industry, the industry also in unceasing development, constantly updated. From the old machine tools, to now have updated into numerical control machine tool, in the numerical control machine has two kinds of CNC lathes and machining centers. When I do the project of CNC  lathe design of feed system . In the numerical control lathe system of tool feed system will be along the two directions, one is the axial Y direction, the other one is the radial is the X direction. CNC machine tool is a composed of different components of a system, is an electromechanical integration equipment. It referred to as CNC numerical control lathe, known as the implementation of a digital computer control, don't need manual operation, only in front of the computer. Write the corresponding program, then type CNC depot. It will fully automatic produce artifacts we want. And in the numerical control lathe is made up of different parts of one of them is also the important one is the servo machining system. Then the servo motor, responsible for the transmission of the screw nut and so on. The design of CNC machine tool feed system, so you need to make sure the use of servo motor, and then the drive the design of the screw nut, workplace is on the whole an important part of the machining accuracy of CNC lathe, and then is the design of the guide rail, the time about the entire numerical control machine tool processing load and friction.

数控车床概述

机械传动的要求在数控车床方面：

 （1）达到数控机床脉冲当量的要求,尽可能加速让他的位移达到指令。

 （2）采取的转动摩擦系数一定要低，选用最佳的降速比，比如滚动导轨等等

 （3）只管缩短传动结构中的传动链,提高传动系统的刚度加载，这在整个传动系统中不可缺少的。

 （4）尽可能消除传动间隙,以降低相反的错误。可以使用消除间隙的耦合和消弭齿轮之间的缝隙法的等。

 （5）所有的场景和方法来满足振动频率低和可靠性提高的等要求。因此应该选取小差距,同时满足精度高,传动稳定,又不会影响传动效率和扭矩传输组件。

在一般情况下，如果本来的车床的工作状态还可行，加工后的进度还没降低，我们可以保留原车床的传动系统。但是反之车窗的工作状态很差，加工的进度不能满足现数控车床的要求，那么我们需要将其传动部件更换新组件。使其保证其加工后的精度。