论文总字数：16510字

摘 要

本文通过给定的论文参数，进行制动钳体机械加工工艺探讨，选取相应的车床夹具、刀具等。通过CATIA设计车夹具所需相关模型，导出dwg格式的二维图，并在CAXA CAD中完成标注，导出工程图纸。

首先对国内外汽车制造工艺发展现状以及未来发展趋势展开，对研究现状和技术瓶颈进行阐述，主要是理解汽车零部件大批量生产所追求的经济效益以及现阶段的技术基础。结合现阶段国内外大型制造企业的研究现状以及未来规划，展望机械加工工艺未来的相关发展方向。

其次，叙述了机械加工工艺的理论知识、工艺规程、工艺路线和相关基准的选取。并结合工厂实际生产条件，计划书给定参数，深入探讨内、外制动钳体的加工工艺路线，进行设计拟定，选取相匹配的机床、刀具与加工工序、加工方法。

了解建模软件CATIA的相关背景，掌握它建模工具的使用，用它完成车夹具的设计和零件模型，并进行装配，导出各零件以及装配总成的二维图纸，熟练CAXA CAD的操作界面，查阅相关资料和书籍，明确公差尺寸标注的相关要求，根据标准准则对零件进行逐一标注，导出相应的工程图纸，完成论文撰写。

最后，对本次毕业设计工作进行总结，并对未来汽车零部件加工工艺提出展望。

关键字：加工工艺 工艺设计 制动钳体 建模装配

Processing technology and process assembly design of light passenger car parts

Abstract

Based on the given parameters, this paper discusses the machining process of the brake clamp body and selects the corresponding lathe fixture and cutter.According to the relevant model required by CATIA to design the vehicle fixture, the 2d drawing in DWG format was derived, and the annotation was completed in CAXA CAD to export the engineering drawing.

Firstly, This article introduces the present situation and future development trend of automobile manufacturing technology at home and abroad, the research status and technical bottleneck are described, mainly to understand the economic benefits pursued by mass production of automobile parts and the technical basis at the present stage. According to the research status and future planning of large manufacturing enterprises at home and abroad, the future development direction of machining technology is prospected.

Secondly, the theoretical knowledge, process procedure, process route and selection of related datum of machining process are described. Combined with the actual production conditions of the factory and given parameters in the plan, the processing process routes of the internal and external brake clamps were deeply discussed, and the corresponding machine tools, cutting tools, processing procedures and processing methods were selected.

Thirdly, understand relevant background modeling software CATIA, grasp its modeling tools use, use it to complete car model, fixture design and parts and assembly, the export of 2 d drawings of each parts and assembly assembly skilled CAXA CAD interface, access to relevant information and books, clear dimensioning tolerance requirements, according to the standard criteria to each annotation of parts, derived the corresponding engineering drawings, complete the thesis writing.

Finally，This essay summarizes the work of the graduation project, and puts forward the prospect of the future auto parts processing technology.

Key Words: Processing Technic; Technics Design; Brake Calipers;

Modeling Assembly;

目录

摘要 I

Abstract II

目录 IV

第一章 绪论 1

1.1背景和意义 1

1.2 国内外汽车零部件加工工艺发展现状 1

1.2.1国内汽车零部件加工工艺发展现状 1

1.2.2国外汽车零部件加工工艺发展现状 2

第二章 关于加工工艺的设计准则 4

2.1设计工艺规程 4

2.1.1工艺准则的制定 4

2.1.2 制定工艺规程所需的相关数据和资料 4

2.2 拟定机械加工工艺路线 4

2.3加工工序的安排 5

2.4确定使用的设备、刀具、卡具、量具 5

2.3.1机床的选择 5

2.3.2刀具、卡具、量具的选取 5

2.4车床夹具定位基准的选取 6

2.4.1基准的类别 6

2.4.2选择定位基准 6

2.5本章小结 6

第三章 内外制动钳体加工工艺 9

3.1内、外制动钳体的构造和工作原理 9

3.2制动钳体工艺特点分析 10

3.2.1制动钳体使用性能要求 10

3.2.1平面的精度标准 10

3.2.2孔的精度条件 10

3．3选取定位基准 11

3.3.1车床夹具粗基准的选取 11

3.3.2车夹具精基准的确定 11

3.4制动钳体工艺路线的拟定 12

3.4.1加工方法的选择 12

3.4.2划分加工阶段 13

3.4.3内、外制动钳体加工顺序的安排 13

3.5本章小结 13

第四章 基于CATIA的车夹具建模与装配 14

4.1CATIA软件的介绍 14

4.2车床夹具设计 15

4.2.1车床夹具的分类 15

4.2.2设计要点 15

4.3内外制动钳体车夹具的制动建模 16

4．4车夹具零件装配 21

4.4基于CAXA CAD的二维图标注以及工程图的导出 28

4.4.1软件介绍 28

4.4.2车床夹具的工程图 28

4.5本章小结 35

第五章 总结 36

参考文献 37

致谢 39

附件 40

第一章 绪论

1.1背景和意义

在新时代下，制造工业发展迅猛，国内基础建设的完善和人民生活水平提高，汽车变得随处可见，成为普通百姓谈论的热门话题之一。随着汽车市场竞争的加剧，如何缩短开发周期、降低生产成本、提高产品市场竞争力，使企业立于不败之地，也成为设计工作者承担的重任^[1]。

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