CATIA平台下柴油机关键件全三维模型数字化定义技术研究摘要目前数字化定义技术正得到大力的发展，也在各个行业领域得到高效地应用，同时它也在不同程度地改变着制造行业的工作方式。不管是对产品设计的途经还是方法进行判断，产品的数字化定义技术进程先后经历了从单一手工图、发展为二维CAD技术，到三维建模技术，这项技术完成了从平面投影方式到全三维实体模型到数字化产品定义的巨大转变。到目前为止，产品的数字化定义技术极大程度的依赖计算机应用系统来完成产品性能以及制造能力的分析和验证。同时，随着计算机和数控加工技术的发展，数字化定义技术在很大程度上缩短了产品的研制周期，提高了质量。50288

针对上述现状，考虑船用柴油机关键件的结构特征，在满足GB/T24734系列的前提下，在CATIA三维软件平台下对船用柴油机关键件进行数字化定义。本文的工作主要是：

1）在CATIA三维软件平台上，完成特定的柴油机关键件的三维模型建立。对所建立的三维模型部件进行装配并模拟仿真

2）使用CATIA V5的三维公差及注释标注(3D Functional Tolerancing& Annotations)功能模块对柴油机关键件进行数字化定义。

3）几何制造信息和非几何信息的操作管理。

4）拓展以零件活塞的三维模型为对象的参数化设计。

毕业论文关键词：数字化定义；柴油机关键件；三维模型；CATIA平台；注释标注；

 Abstract

Currently digital definition technology is not only being vigorously developed, but also getting various industries to efficiently applied, varying degrees, and it also changed the manufacturing industry works. Whether the product design or method of passing judgment, the product definition of digital technology have gone through the process of a single hand-drawing from the beginning, followed by the development of two-dimensional CAD technology, and then three-dimensional modeling technology, which finished from flat projection to the full three-dimensional solid model of digital product definition and finally a huge change. So far, the definition of digital products have a great extent dependent on the technology of computer application system to complete the product performance and manufacturing capacity analysis and verification. Meanwhile, with the computer and CNC machining technology, digital technology is largely defined shorten the product development cycle, improve the quality.

For the above situation, consider the critical parts of the structure of marine diesel engine characteristics, to meet the GB/T24734 series, under the premise of CATIA software platform under three key pieces of marine diesel engines for digital definition. This work is mainly:

1) In the CATIA three-dimensional software platform, complete a specifical key pieces of diesel-D model. Three-dimensional model for the establishment of components for assembly and simulation

2) Using CATIA V5 dimensional tolerances and notes marked (3D Functional Tolerancing & Annotations) function module key parts of diesel engine digitize definition.

3) Geometric and non-geometric information manufacturing information operations management.

4) Develop a three-dimensional model to Parts Piston parametric design for the object.

Key words: Digital definition; Diesel key pieces; Dimensional model; CATIA platform; Annotation;

 目录

第一章 绪论 1

1.1 课题研究背景 1

1.2 课题研究的现状 1

1.2.1 国内全三维模型的数字化定义技术研究现状 1

1.2.2国外全三维模型的数字化定义技术研究现状