【作者】 杨智；

【导师】 葛研军；

【作者基本信息】 大连交通大学 ， 机械制造及其自动化， 2005， 硕士

【摘要】 本文主要研究数控系统组成结构、网络通信及CAD/CAM/DNC集成系统,并研制出网络化数控加工实用化系统。 根据协议转换联网原理,将具有RS-232通信接口的数控机床进行组网,提出一种新型的DNC通讯结构,并实现其数据通信、实时控制等功能。基于Windows多线程技术,开发出实用化DNC通讯系统,可用一台主计算机同时控制多台数控机床(最多可达256台),并可实现主计算机无人值守。系统经实际运行,具有可靠性好、稳定性高及实用性强等特点,可极大的提高数控机床的执行效率。为企业网络化制造、高自动化生产奠定良好底层技术基础。 另外,基于AutoCAD2000,开发出图形自动编程系统,输入简单二维零件图形的DXF文件,通过设置后置参数和工艺参数,自动生成数控代码,可通过串口通讯传输给数控机床,从而实现控制与编程一体化。更多还原

【Abstract】 In this paper, the structure of NC system, network communication and CAD/CAM/DNC system are mainly investigated and a network NC machining applied system is developed.According to the protocol conversion networking theory, make the CNC which has RS-232 serial port to be linked together.At the same time,a new type of DNC communication structure is brought forward, and the function of data communication,real-time control are all realized.On the basis of the Windows Multi-thread technology, a convenient and useful DNC communication system is developed.By using the system, many CNCs(the quantity can reach to 256) could be controled synchronously by one host computer and the host computer can be work with no operator.Through practical running, the system performs the characteristic of good reliability,high stability and strong practicability,which can improve the execution efficiency of CNC remarkably.This establish good and basic technical foundation for enterprise to achieve network manufacturing and highly automation manufacturing.On the basis of AutoCAD2000, graphics automatic programming system is developed.Importing DXF file of simple planar graphics and through setting postpositive parameter and technologic parameter, NC codes can be created automatically. These NC codes can be transmitted to the CNC through serial communication, so the integration of control and programme is realized.更多还原