本科毕业论文范例

湖 北 汽 车 工 业 学 院 毕 业 论 文

摘要

本文针对齿轮在汽车设计中应用的广泛性和通用性，根据相关总成对汽车齿轮进行分类；同时根据机械零件中有关齿轮的设计原理，利用CATIA V5 的参数化函数设计功能建立各种汽车齿轮的三维模型；并结合CATIA V5的知识工程，利用 CATIA V5的Catalog库功能，建立了一套较完整的汽车齿轮库。该齿轮库能够在汽车设计中进行直接调用，为汽车设计工作提供了极大的便利。

关键字：CATIA，齿轮，参数化设计，零件库

I

湖 北 汽 车 工 业 学 院 毕 业 论 文

Abstract

Focusing on the widespread use of gear in automotive, the paper classifies the gear using in automotive according to each assembly. With the design theory of gear in mechanical parts, the paper models various gears in CATIA V5 by using its parametric function. Integrating the Knowledge module of CATIA V5, the paper forms a suit of gear library of automotive via the faction of Catalog in CATIA V5. The library can be put into use directly and taken its advantages in vehicle design.

Keywords: CATIA , automobile, gear, Parametric Design, catalog

II

湖 北 汽 车 工 业 学 院 毕 业 论 文

目录

摘要 ............................................................................................................................................ I Abstract ..................................................................................................................................... II 1 设计总则 ............................................................................................................................. 1

1.1 课题的来源 ............................................................................................................. 1 1.2 设计背景.................................................................................................................. 1

1.2.1 齿轮工业介绍 .............................................................................................. 1 1.2.2 国内外发展的状况 ..................................................................................... 1 1.3 综合分析以及设计目的......................................................................................... 3 2 汽车齿轮方案分析............................................................................................................. 6

2.1 建立汽车齿轮库的方案......................................................................................... 6 2.2 汽车齿轮分类方案比较......................................................................................... 7

2.2.1 按照齿轮传动类型对汽车齿轮进行分类................................................ 7 2.2.2 按制造方法对汽车齿轮进行分类 ............................................................ 9 2.2.3 按照齿轮所在的汽车总成对汽车齿轮分类............................................ 9 2.3 汽车齿轮分类方案分析与确定：......................................................................10

2.3.1 第一级按照汽车总成分类 .......................................................................10 2.3.2 第二级按照汽车车型分类 .......................................................................10 2.3.3 第三级按照齿轮传动类型分类 ..............................................................13 2.3.4 第四级按照齿轮的基本参数分类 ..........................................................13

3 汽车齿轮三维参数化建模 ..............................................................................................18

3.1 参数化设计的介绍 ...............................................................................................18 3.2 汽车基准齿轮的建模简介 ..................................................................................19 3.3 直齿轮的参数化建模...........................................................................................19

3.3.1 直齿轮几何特征........................................................................................19 3.3.2 渐开线直齿轮参数化建模过程 ..............................................................20

III

湖 北 汽 车 工 业 学 院 毕 业 论 文

3.4 斜齿轮的参数化建模...........................................................................................23

3.4.1 斜齿轮的几何特征 ...................................................................................23 3.4.2 斜齿轮建模的基本思路 ...........................................................................24 3.4.3 斜齿轮参数化建模过程 ...........................................................................24 3.5 直齿锥齿轮的参数化建模 ..................................................................................25

3.51 直齿锥齿轮几何特征 .................................................................................26 3.52 直齿锥齿轮建模的基本思路 .....................................................................26 3.6 蜗杆的参数化建模 ...............................................................................................27

3.61 蜗轮的几何特征..........................................................................................27 3.62 蜗杆建模的基本思路 .................................................................................27

4 建立汽车齿轮零件库 ......................................................................................................28

4.1 相关术语的介绍 ...................................................................................................28 4.2 汽车齿轮命名方法 ...............................................................................................30 4.3 汽车齿轮设计表的建立.......................................................................................31 4.4 汽车齿轮Catalog的目录建立 ..........................................................................33

4.4.1 Catalog的建立.........................................................................................33 4.4.2 章节(Chapters)的建立 ...........................................................................33 4.4.3 类(family)的建立 ...................................................................................34 4.4.4 关键字(keywords)的建立 .......................................................................35 4.4.5 添加齿轮到Catalog ................................................................................36 4.5 汽车齿轮库的使用方法.......................................................................................37 4.6 汽车齿轮库的管理 ...............................................................................................40 5 结论与展望 .......................................................................................................................41

5.1 结论 ........................................................................................................................41 5.2 存在的不足 ...........................................................................................................41 5.3 展望 ........................................................................................................................42 致谢 ..........................................................................................................................................43 参考文献..................................................................................................................................44

IV

湖 北 汽 车 工 业 学 院 毕 业 论 文

附录一 ......................................................................................................................................46 附录二 ......................................................................................................................................46

V

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