论文总字数：27296字

摘 要

“汽车CAD系统”的设计是采用Visual Basic和AutoCAD集成的系统开发环境，以Visual Basic语言为编程实现工具；它充分的利用了模块化的开发设计思想和方法，把IT行业当今最流行的数据库、图形集成、显示技术同机械制造业进行了完美的结合。主要用途：用于汽车、车辆产品开发设计、产品改造设计。论文开题介绍了世界汽车发展历史和现状，汽车CAD系统的发展和现状，以及汽车从动桥性能，结构等介绍，接下来详细讲解如何使用Visual Basic 6.0制作登陆模块、主控模块和计算校核模块以实现对从动桥结构参数、性能以及零件的强度计算校核，最后介绍了从动桥计算校核模块的开发过程和设计方法。

关键词：汽车 CAD系统 Visual Basic 从动桥

Auto CAD System——The Check and Calculation Module of Driven bridge

Abstract

"Auto CAD system" is designed by using Visual Basic and AutoCAD integration system development environment, with Visual Basic programming language so as to realize the tools; It fully uses the modular design thought and method, the IT industry of today's most popular database, graphical integration, display technology with the perfect combination of mechanical manufacturing.Main application: used in automobile, vehicle product development design, product design.The paper firstly introduces the development history and present situation of the world car auto CAD system development and the status quo, as well as the car driven bridge performance, such as the structure is introduced, then in detail how to use Visual Basic 6.0 to make landing module, control module and calculation checking module to realize the driven bridge structure parameters, performance and strength calculation and checking of the parts, At last, the paper introduces the development process and design method of the steering gear calculating check module.

Key Words: Automobile; CAD system; Visual Basic; Driven bridge

目录

摘要…………………………………………………………Ⅰ

Abstract………………………………………………………Ⅱ

1. 绪论……………………………………………………………...1

1.1汽车的发展与现状.............................................1

1.1.1世界汽车的发展...........................................1

1.1.2中国汽车的发展...........................................5

1.2 CAD技术的应用及发展........................................6

1.2.1 CAD系统的简介...........................................6

1.2.2 CAD技术的发展...........................................7

1.2.3汽车CAD技术.............................................7

1.3汽车CAD系统的发展现状........................................8

1.3.1国外发展现状............................................8

1.3.2国内发展现状............................................8

1.4汽车从动桥..................................................9

1.4.1概述....................................................9

1.4.2从动桥结构形式..........................................9

1.5对设计从动桥计算校核模块的研究与设想........................11

第二章 汽车CAD系统的设计.................................12

2.1设计所需的系统支持.........................................12

2.2设计模块划分...............................................12

2.3汽车CAD系统设计流程图......................................13

2.4汽车CAD系统的设计特点......................................14

第三章 从动桥模块的窗体设计与编译........................15

3.1登录模块...................................................15

3.1.1窗体的界面设计.........................................15

3.1.2窗体的程序编译.........................................16

3.2主控模块...................................................17

3.2.1窗体的界面设计.......................... ...............17

3.2.窗体的程序编译...........................................19

3.3从动桥计算校核模块.........................................19

3.3.1前轴总成计算参数.............................. .........19

3.3.2前轴在紧急制动时的载荷计算.............................23

3.3.3主销弯矩计算...........................................28

3.4标准模块...................................................33

第四章 从动桥计算校核模块的开发研究......................35

4.1数据库应用程序的开发.......................................35

4.1.1概述...................................................35

4.1.2数据库的建立...........................................35

4.2 冗长数据的简化处理........................................38

4.3 错误陷阱的设置............................................39

第五章 总结..............................................43

参考文献.................................................44

致谢.....................................................46

第一章 绪论

1.1汽车的发展与现状

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