Software scale and life period of mechanical cad system continuously increases along with the development of production . it request better reusage , enlargement , maintenance . 随着生产实践的发展，机械cad系统的软件规模不断增大，生命期不断加长，对机械cad系统重用性、扩充性、维护性等提出了更高的要求。
Cad / cam outsourcing company , including 2d mechanical drafting , mechanical cad , architectural cad , 2d drafting , structural cad drawings , 3d modeling , 3d rendering , cad conversion , gis , industrial design and ad design 本公司成立于2006年,主要从事产品设计,模型设计与制做.我们拥有一支专业性非常强的队伍.希望我们能成为合作伙伴
In second chapter it is analyzed for the research present condition of concurrent design completely about the component software on home and abroad , it is put forward for the control tactics of the development concurrent suiting mechanical cad 第二章全面地分析了国内外组件软件和并行设计的研究现状，提出了适合机械cad的并行开发的控制策略。
The port - mechanical cad software obtained certain achievements in the course of really application and development , but owing to the confinement of technique condition on the development and environment , they exist many problems to remain the settlement 港机cad软件在实际运用和开发过程中都取得了一定的成果，但由于当时的开发环境及技术条件的限制，还存在不少问题有待解决。
In this paper , the idea and methods of the object - oriented technology are presented for the design and realization of a mechanical cad system . it discusses some methods and principles of development for a special purpose mechanical cad system based on uml by the tool of rational rose 论文中通过对uml方法的介绍，提出将uml方法引入到机械cad系统的开发中的思想，并结合专用机械cad系统的特点，对uml面向对象分析在专用机械cad系统开发中的一般过程进行了论述。
On base of concurrent design theory , method and technique , this thesis studies the " application and research of the pivotal technique on component - based concurrent development ( cbcd ) for mechanical cad " , combines with the development of tire elevator intelligence cad / cam system , puts forward the system frame of the concurrent design and development on the based component , and researches their pivotal technique 本文以并行设计理论、方法及技术为依据，对“基于组件的机械cad并行开发及关键技术”进行研究，结合轮胎起重机智能cad cam系统的开发，提出了基于组件的产品并行设计与开发理论体系，对其中的关键技术进行了研究。
Advanced design tools are applied in high - precision and large - size optomechanical system design , such as optical cad software ( code v , zemax etc . ) and mechanical cad software ( nastran , ansys , ideas etc . ) are applied in optical design and mechanical design respectively . there is not any integrated optomechanical analysis tools 目前，大型高精密光机系统设计都采用了先进的仿真设计手段，如：光学设计普遍采用了codev 、 zemax等仿真设计工具，机械设计采用msc _ patran 、 msc _ nastran 、 ansys 、 ideas等有限元分析计算工具。
It ' s a developing direction to use object - oriented method in mechanical cad system . uml , a standard modeling language of object - oriented , amalgamates the basic concepts of usual object - oriented methods and unifies symbol system , has become a dominant method in the development of software in the last few years 并根据机械cad系统体系结构的划分，从开发环境、几何(支撑)平台及类结构层次的划分等方面分别论述了面向对象思想在通用机械cad系统及专用机械cad系统开发中的运用及其优越性。
New way of thinking that uml is applied in special mechanical cad system develop is brought up and the process and concrete realizing method is specified through the research of applying uml in vem cad system develop . common method of specifying the relation of part and assemble objects is put forwards . it " s more efficiency to organize and realize data using part parametric method to specify the attributes of part objects in comparison with common parametric technic 通过研究uml在立磨机cad系统开发中的应用，提出将uml应用于专用机械cad系统开发的新思路，确定了基于uml的专用cad系统开发的步骤及具体实现方法；提出确定零部件对象间关系的一般方法；采用基于特征的零件参数化确定零件对象的属性，相对于一般的参数化技术能更有效地对数据进行组织、实现。
In order to resolve the software crises , not only the method of software engineering but also the tools of computer - aided software engineering must be used in the development of software . mechanical cad system developing with structure method has bad readability , expansion and maintenance . the object - oriented technology provides a satisfactory solution tool for the design of large - scale and complex system 本文通过对现代软件技术的发展及软件工程思想，尤其是对面向对象的软件工程思想的介绍，并结合机械cad技术的发展及机械cad软件的特点提出：在机械cad软件的开发中必须选用先进且适合的软件开发方法? ?面向对象的软件工程方法。
