（精）数控技术(双语).ppt

Chapter1 Introduction to numerical control 1.1 Fundamentals of NC technology 1.1.1 Development history of NC Late 1940s，John parsons and Frank stulen put up NC ideas . parsons corporation（Traverse city, Michigan) the idea of using coordinate position data contained on punched cards to define and machine the surface contours of airfoil shapes precision: ±0.0015 inch (±0.038mm) April 1951, Contract was signed by MIT and Air Force. March 1952, The first NC machine was developed by MIT. Cincinnati Milling Machine Co. vertical Hydro- Tel milling machine. Controller consisted 292 vacuum tubes. Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control 1954 Industry NC machine was developed by Bendix Co. Machine center was developed by Keaney and Trecher Co. Machine center: Multifunction NC machine with automatic tool changer and tool storage. 1967 FMS was developed by Mollin Co. Mollin 24 system, (24hr/day,16hr human worker unattended) 7 machine tools was controlled by IBM1360/140 computer. Chapter1 Introduction to numerical control 1.1.2 Concept of NC and CNC GB8129-87定义：数字控制（NC）是用数字化信号对机床运 动及其加工过程进行控制的一种方法，简称数控。 数控机床（NC machine) 是采用了数控技术的机床或者说是 装备了数控系统的机床。 NC hardwired NC CNC Computer numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control Chapter1 Introduction to numerical control 1.1.3 Basic component of NC machine tools The work process of NC