(毕业设计)数控车床横向进给系统的设计.doc

(毕业设计)数控车床横向进给系统的设计


摘  要

数控机床集中了传统的自动机床、精密机床和万能机床三者的优点，将高效率、高精度和高柔性集中于一体。而数控机床横向进给技术水平的提高首先依赖于进给和主轴驱动特性的改善以及功能的扩大，为此数控机床对进给伺服系统的位置控制、速度控制、伺服电机、机械传动等方面都有很高的要求。
数车床改造是指以机械位置作为控制对象的自动控制系统。在数控机床中，伺服系统主要指各坐标轴进给驱动的位置横向进给控制系统。伺服系统接受来自CNC装置的进给脉冲，经变换和放大，再驱动各加工坐标轴按指令脉冲运动。这些轴有的带动工作台，使刀具相对于工件产生各种复杂的机械运动，加工出所要求的复杂形状工件。
横向进给系统是数控装置和机床机械传动部件间的联系环节，是数控机床的重要组成部分。它包含机械、电子、电机(早期产品还包含液压)等各种部件，并涉及到强电与弱电控制，是一个比较复杂的控制系统。横向进给的确是一个相当复杂的任务。提高伺服系统的技术性能和可靠性，对于数控机床具有重大意义，研究与开发高性能的伺服系统一直是现代数控机床的关键技术之一。

关键词：横向进给 数控化 车床改造

Abstract
Numerical control lathe have following outstanding superiority than traditional lathe include:
Can process out complicated parts, such as the Landscape orientation curve coming out in traditional machine tooling, curved surface etc; Because computer have superb operation ability is can instantaneous to calculate out each coordinate axis instantaneous amount of exercise that should move accurate, Landscape orientation compound into the complicated curve or curved realize automation automatically etc; Therefore can realize that nobody guards and processes for a long time.
Numerical control lathe reform system, should reach in the design: There is high quiet dynamic rigidity; The coefficient of friction between the vice sport is little, the transmission has no interval ; Landscape orientation to operate and maintenance. Lathe numerical control should try one's best and reach and require while being above-mentioned when the transformation. Can't think and link numerical control device and ordinary lathe together and reach numerical control request of lathe, Also should carry on to main part corresponding transformation enable their reaching certain designing requirement, Purpose of transforming that could be expected
Landscape orientation the numerical control of lathe transforms the key step: The technology of the transformation I Whether the technology lay, circuit move towards and be regular, adjust components and parts position, seal and not essential to decorate etc. At last debugging it.
Key words: landscape orientation   numerical control   lathe reform

                            目 录

摘 要 .2
Abstract............................................................3
目 录 4
第一章  引 言 5
1.1  设计目的及方法 5
1.2  进给系统概述 6
第二章  进给传动设计 7
2.1  主切削力计算及技术参数 7
2.2  滚珠丝杠螺母副的选择与计算 9
2.2.1滚珠丝杠螺母副的选择 9
2.2.2丝杠螺母副的计算 10
2.2.3滚珠丝杠螺母副的校核 12
第三章  动力计算 17
3.1  支撑轴承的设计 17
3.2  伺服电机的选择 17
结 论 18
致谢语 19
参考文献 20