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本文介绍了机械传动原理图的ＣＡＤ技术以及软件设计的基本方法。原理图中的基本图形被定为基本模块，按参数绘图形式完成，使本系统有很好的可管理性。软件设计中采用了两种输入方式：交互式输入方式采用了屏幕菜单技术，通过人机交互输入有关参数即可设计出相应传动原理图；而用读取数据文件形式时，可与上级专家系统联接，由专家系统推导出的数据文件自动生成原理图。本系统是机电产品原理方案自动化设计系统的重要组成部分，并有较强的独立性，可供技术人员进行各种机械传动原理方案设计时便利使用。
This article describes the mechanical transmission principle of the CAD technology and software design of the basic methods. The basic graphics in the schematic are defined as the basic module, completed by the parameter drawing, so that the system has good manageability. Software design uses two input methods: interactive input using screen menu technology, enter the relevant parameters through human-computer interaction can design the corresponding drive schematic diagram; and use to read the data file format, with the higher level expert system Coupling, derived from the expert system data files automatically generated schematic. The system is an important part of the automation design system of mechanical and electrical products principle scheme, and has strong independence, which can be used conveniently by technicians when designing various mechanical transmission schemes.