编号
本科生毕业设计
箱体零件加工工艺设计及装夹变形分析
Body Parts Processing Technology Design and Clamping Deformation Analysis
学 生 姓 名 专 业 学 号 指 导 教 师 学 院
二〇一一年六月
长春理工大学本科毕业设计
摘 要
箱体是机器和部件的基础零件，由它将机器和部件中许多零件连接成一个整体，并使之保持正确的相互位置，彼此能协调地运动。箱体类零件由箱座、箱盖组成，其结构较为复杂，其上通常有一些尺寸精度和位置精度要求都比较高的定位销孔，用作相关零件定位或在加工过程中定位，故机械加工劳动量相当大，困难也相当大，对工艺人员工艺、夹具设计提出很高要求。
保证零件加工质量的前提下，提高生产率，降低成本，是国内外现代机械加工工艺的主要发展方向之一。本文通过对箱体零件图及结构形式的分析基础上，对箱体零件进行工艺分析、工艺说明及加工过程仿真和精度分析。同时以此箱体零件为例进行工艺过程设计，编写相应工艺卡片；其次再对箱体表面的孔的加工进行专用夹具设计与精度和误差分析。实践证明，该工艺与夹具结果能满足生产要求。
关键词：箱体零件 加工工艺 定位 夹具设计
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长春理工大学本科毕业设计
Abstract
Box is the basis of machines and components parts, which makes many parts are linked into a whole, and make it maintain the correct mutual position, in a coordinated manner with each other movements. Box-type parts are composed of the box seat, lid, whose structure is more complicated, It usually have some higher positioning pin hole on the size accuracy and position precision requirements, used as a related parts positioning or in the machining process positioning, so the mechanical processing needs quite large work. There, it is difficult for process workers to design the process and fixture.
At the premise of ensure parts processing quality, improve productivity and reduce the cost is one of the main development direction in modern machining technology at home and abroad. This article based on the analysis of body parts graph and the structure to have processing process simulation and precision analysis about the parts and process description. At the same time, to make the box as an example we design the process design, and make the corresponding process cards. And then to design the special fixture for the machining the hole at the surface of the boxes and analyses the precision and the error. The practice proved that this process and fixture can satisfy the production requirements.
Key words: Case accessories; Processing technology; Fixed position; Fixture design
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长春理工大学本科毕业设计
目 录
摘 要.............................................................. I ABSTRACT........................................................... II 目 录............................................................. III 第1章 绪论........................................................ 1 第2章 箱体零件简介................................................ 2 2.1箱体零件的功用与结构特点 ...................................... 2 2.2箱体零件的主要技术要求 ........................................ 2 2.3箱体零件的材料及毛坯 .......................................... 3 第3章 箱体结构及加工工艺过程...................................... 4 3.1箱体机械加工的结构工艺性 ...................................... 4 3.2 箱体机械加工工艺过程及工艺分析 ................................ 4 第4章 箱体零件的加工方法.......................................... 6 4.1箱体平面的加工方法 ............................................ 6 4.2 箱体孔系的加工方法 ............................................ 6 第5章 箱体零件的加工工艺过程..................................... 11 5.1 制订箱体工艺过程的共同性原则 ................................. 12 5.2定位基准的选择 ............................................... 13 第6章 夹具设计................................................... 18 6.1夹具介绍 ..................................................... 18 6.2夹具设计要求 ................................................. 18 6.3工件的夹紧计算及其选择 ....................................... 19 6.4夹具结构分析与设计 ........................................... 22 第7章 箱体零件数控加工仿真........................................ 26 7.1数控仿真简介 ................................................. 26 7.2数控仿真加工步骤： ........................................... 26 结 论........................................................... 28 参考文献........................................................... 29 致 谢........................................................... 30
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长春理工大学本科毕业设计
附 录........................................................... 31
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