搅拌站安全知识讲座讲义.doc

毕 业 设 计（论文） 题目 摇臂加工工艺规程及夹具设计 专 业： 学 生 姓 名： 班 级： 学 号： 指 导 教 师： 完 成 时 间： 摘要 夹具是零件加工的夹紧装置，是加工零件的一种必不可少的装置。夹具利用率高，经济性好，对功能组件的使用和数量少。随着零件的尺寸变化，越来越多的夹具被淘汰了，因此，设计一套专用夹具是十分有必要的。在设计专用夹具时要考虑工件的定位方案，工件的夹紧方案和设计夹紧机构，夹具的其他组成部分，夹具的结构形式等。 夹具主要依据零件的加工要求来设计的。夹具应满足零件加工工序的精度要求、加工生产率要求，并保证操作方便、安全及使用寿命和较低的夹具制造成本。本课题设计的题目是计算机辅助夹具设计。其零件是摇臂，摇臂是一种很重要的零件，主要用于连接前后零部件，起到传递运动和动力的作用，受力不大。本文就摇臂28.5±0.1mm槽设计出在卧式铣床上加工的专用夹具。本夹具体是以保证加工精度，生产效率和便于工人操作为宗旨展开的设计。 设计之初我查阅相关数据及国内外关于机床夹具的文献，在看懂零件图的同时对零件的结构和工艺进行分析，明确粗基准和精基准的选择，确定零件的加工余量与毛坯的尺寸、从而确定零件的加工工艺过程、计算各工序的切削用量及工时。最终完成了本次设计所需的夹具。 关键词：夹具、夹紧装置、摇臂、基准 ABSTRACT Clamping device clamps are machined parts , is an essential part of the processing unit . Fixture high utilization, the economy is good , less use of functional components and quantities . As part of the changes in the size , more and more fixtures are eliminated, therefore, the design of a special fixture is very necessary . In the design of special fixtures to consider when positioning scheme workpiece clamping scheme and design workpiece clamping mechanism , other components of the jig , fixture and other structural forms . Processing requirements based primarily on fixture parts to design. Fixture parts shall meet the accuracy requirements of manufacturing processes , processing productivity requirements, and to ensure ease of operation , safety and service life and lower fixture manufacturing costs. This topic is the subject of computer-aided design fixture design . Its parts are Rocker , Rocker is a very important part , is mainly used to connect the front and rear parts , played the role of motion and power transmission , a large discontinuity . In this paper, rocker 28.5 ± 0.1mm slot designed special fixtures on horizontal milling machining . The specific folder is to ensure accuracy , productivity and ease of operation for the purpose of workers expanded design. I looked at the beginning of the design -related data and literature on