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一前言数控机床的产生,成功地解决了机械制造业中占机械加工70%以上的中小批量生产和复杂零件的加工自动化问题。如果数控装置是由硬件逻辑构成的话,那么它的功能弱、灵活性小、通用性差、维修也不方便,因而这种专用数控系统有很大的局限性。随着计算机的发展,出现了以计算机为核心的计算机数控(CNC)、计算机群控(DNC)和微型计算机数控(MNC)系统。它们的
A foreword The birth of CNC machine tools, has successfully solved the mechanical manufacturing industry accounted for more than 70% of the machining of small and medium-sized batch production and complex parts processing automation problems. If the numerical control device is composed of hardware logic, then its function is weak, flexibility is poor, poor universality, maintenance is not convenient, so this special CNC system has great limitations. With the development of computer, computer-centric CNC, Computer Group Control (DNC) and Microcomputer Numerical Control (MNC) systems have emerged. their