The system realizes multiple serial port communication and management by way of multi - port serial board ( 2 ) use the database technology to manage and manipulate the physics information data of nc tool . the basic information management system , the nc program auto - create system , the simulation of cutter working and dnc communication program are integrated to one system . it realizes the offline programming and controls of no - punched tape , helps to cut short the supplementary cutting time and improves the efficiency of to program and machine tools and realizes the separation and seamless connection of program and manufacture 本课题以硬件为辅助手段,以软件为主要手段实现了以下功能:以串口扩展卡来实现网络中多台数控机床的通信和管理;使用数据库技术对数控机床的物理信息进行管理和操作,将数控机床基础信息管理系统、 nc程序自动生成模块、刀具加工轨迹仿真模块和dnc通信接口模块集成为一体,实现了数控加工的离线编程和数控系统的无带控制,提高了编程效率、质量,缩短加工辅助时间,提高了机床的效率,既实现了编程和加工的分离,又达到它们之间的无缝连接。