摘要本文为“高档数控机床与基础制造装备”国家科技重大专项“高档数控机床设计关键技术研究和数字化工具开发”的一个课题，主要研究滑动支撑进给系统的设计和静动校核分析。对滑动支承直线进给系统的设计主要有：传动设计、滚珠丝杠及其支承形式的选择、伺服电动机的选择、伺服系统的设计。对进给系统的静动态特性的研究关键在于建立其静力学模型，论文通过Pro/Engineer建立滑动支承直线进给系统的静力学模型。在此基础上建立滚珠丝杠副、进给系统工作台和底座的有限元模型，运用Ansys分析外载荷和自身结构参数对进给系统定位精度的影响，以及筋板结构对滑台底座固有频率的影响。61554

毕业论文关键字  进给系统 滑动导轨 定位精度 有限元

毕业设计说明书（论文）外文摘要

Title Design of linear feeding system of sliding bearing machining center and the static and dynamic analysis

Abstract This subject is one of the "High-grade CNC Machine Tools and Basic Manufacturing Equipment" of National science major technology project which  named "Research on Key Technology of High-grade CNC Machine Design and the Development of Digital Tools" . It mainly studies on design of feed-ing system of sliding bearing , and static and dynamic analysis. The design of linear feeding system of sliding bearing includes the ball screw and its support , the choice of servo motor , and the design of sever system . We used software Pro/Engineer to finish the design of sliding support feeding system and the building the model of its static analysis. On this basis , we builded the finite element model of the ball screw ,  the work bench and the base . At last , we used the software of Ansys to finish the analysis of the influence of positioning accuracy caused by external loads and their structure parameters , and the influence of base’s natural frequency caused by its structure type .

Keywords    Feeding system  Slideing guide  Positioning accuracy  Finite element

目录

1  绪论 1

1.1  研究背景 1

1.2  研究的目的 1

1.3  滑动支承直线进给系统设计的研究现状及发展趋势 2

1.3.1  滑动支承直线进给系统设计研究概况 2

1.3.2  数控进给系统静态特性研究概况 3

1.3.3  当前滑动支承进给系统研究的不足 4

2  滑动支承直线进给系统设计 5

2.1  传动系统 5

2.2  滚珠丝杠 6

2.2.1  精度 6

2.2.2  疲劳强度 6

2.3  丝杠支承 7

2.4  伺服电机 9

2.5  精度验算 11

2.5.1  滚珠丝杠的拉压刚度 11

2.5.2  丝杠轴承的轴向刚度 11

2.5.3  丝杠螺母的接触刚度 11

2.5.4  挠性联轴器的扭转刚度 11

2.5.5  伺服刚度 11

2.5.6  综合刚度 12

2.5.7  弹性变形