毕业设计论文--X-ray残余应力分析系统结构设计.doc

本科毕业论文(设计) 题 目：X-ray残余应力分析系统结构设计 学生姓名： 指导教师： 学 院：机电工程学院 专业班级：机械1005班 完成时间：2014年5月27日 本科生院制 2014年5月  摘要 目前，国内残余应力测量机构多为手动或半手动装置且定位精度不高，无法满足制造业需求。故本文旨在设计一种四自由度（即X、Y、Z三维平动和Z向转动）的全自动、高精度、新型结构平台，通过此平台的移动实现放置在其上的X-ray残余应力分析仪器的精确定位，以达到高精度测量金属表面残余应力的预期效果。 本文在X、Y方向设计了滚珠丝杠副结构满足传动进给要求，Z向设计了行星滚柱丝杠副结构实现传动和一对圆锥滚子轴承实现转动。确定了系统结构主要尺寸参数，其中着重进行了三向进给传动系统的设计计算及校核。采用Pro/E软件进行三维模型绘制，重点绘制了行星滚柱丝杠副，滚珠丝杠副三维模型结构，最终构造四自由度平台三维整体模型，另外，在设计过程中对预紧、预拉伸、调隙及轴承固定等具体结构也进行了设计。后期采用Pro/E软件对此平台进行外观造型设计。 关键词：四自由度 X-ray残余应力 行星滚柱丝杠副 三向进给传动系统计算 三维模型绘制  Abstract At present, the domestic residual stress measurement instrument mostly are manual or semi-manual device and its positioning accuracy is not high, which Can not meet industry needs .This thesis aims to design a fully automatic four degrees of freedom, high-precision, new structural platform. By moving this platform, where the X-ray residual stress analysis instruments is placed to achieve precise positioning. In order to achieve high-precision measurement of metal surface residual stress effects which is expected. In the design process, using ball screw deputy achieve X, Y direction requirements of feed transmission, planetary roller screw deputy achieve Z direction requirements of feed transmission, a pair of tapered roller bearings for rotating the Z direction. The transmission system analysis and calculation was Completed. Determine the main dimensions of the system structure, which were focused on three directions drive feed transmission system design calculations and checking. The three-dimensional model was drawn by Using Pro / E software Focus drawn three-dimensional model of the structure of planetary roller screw deputy and ball screw deputy. Eventually construct a three-dimensional model of four degrees of freedom platform. In addition, the specific structure of preload, pre-stretch, transfer gap, and bearing fixed also were designed and constructed in the design process. In the late, the exterior of this four-DOF platform was des