机电工程专业英语 教学课件 ppt 作者 马佐贤 主编 张雪娟 副主编Unit 8.pptVIP

* * Unit 8 The Advantages and Disadvantages of CNC Dialogue 8.1 8.2 The Advantages and Disadvantages of CNC Dialogue 8.1 Welcome to our factory! CNC machine tools CNC lathes CNC millers CNC machining center What is NC? CNC lathes 数控车床 CNC millers 数控磨床 CNC machining center 数控加工中心 How to operate CNC tools? It is not very difficult, if we are diligent in work. The Advantages and Disadvantages of CNC Machines 8.2 How many advantages of CNC machines are there? There are six advantages. The best advantage of CNC machines is Production is significantly increased machine tool 机床 conventional profile conventional machine 普通的；常规的 外形；轮廓 常规机床 what are the disadvantages of CNC machine? (1)They are quite expensive． (2)They have to be programmed，set up，operated，and maintained by highly skilled personnel． machine tool 机床 which enables them to answer the increasingly strong requirements for production speed and quality that competitive markets demand machine tool 机床 production speed 生产速度 markets demand 市场需求 *