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舄鼍搀名棰磉宴彳名魔踣脎
NC and CNC窦耷撰坚貌巩垡鞑驽珀滤阋
数控技术瑕肘嵊咀鲤盾撼城堑鳝渎冢
The History of NC and CNC Development泗郅壬冱龠陈反遑砾宗突勖
数字控制与计算机数字控制的发展历史呒芜劢镀掠硗怕旅轿交蒸筘
Numerical Control (NC) is any machining process in which the operations are executed automatically in sequences as specified by the program that contains the information for the tool movements. The NC concept was proposed in the late 1940s by John Parsons of Traverse City, Michigan. Parsons recommended a method of automatic machine control that would guide a milling cutter to produce a "thru-axis curve" in order to generate smooth profiles on work ***钐芒殊
数字控制是按照含有机床(***)运动信息程序所指定的顺序自动执行操作的加工过程。数控这一概念是由密歇根洲特拉华城的约翰·帕森于20世纪四十年代后期提出的。为了在工件上加工光滑的轮廓，帕森提出了一种自动的机床控制方式，它能够引导铣床***加工出一种“过轴曲线”。司负螺沏磕恿妈崤翔魅宗铝
In 1949, The . Air Force awarded Parsons a contract to develop a new type of machine tool that would be able to speed up production methods. Parsons commissioned the Massachusetts Institute of Technology (.) to develop a practical implementation of his concept. Scientists and engineers at . built a control system for a two-axis milling machine that used a perforated paper tape as the input media. In a short period of time, all major machine tool manufacturers were producing some machines with NC, but it was not until the late 1970s that computer-based NC became widely used. NC matured as an automation technology when inexpensive and powerful microprocessors replaced hard-wire logic-making computer-based NC
1949年，美国空军与帕森签署了合同，要求开发一种能够提高生产率的新型机床。帕森委托麻省理工学院(MIT)来开发一种新概念机床，麻省理工学院的科学家和工程师研制出了一种用穿孔纸带作为输入媒介的二轴联动铣床控制系统。在较短时间内，当时所有主要的机床生产商都生产了一些数控机床，但直到20世纪七十年代后期，基于计算机的数字控制才被得到广泛的使用。只有价格低廉且功能强大的微处理芯片代替了计算机数控系统中的硬连线逻辑发生器后，NC才真正成为一门自动化技术。牵螵脓泮鲍饭拭苍沆崽埂灏
When Numerical Control is performed under computer supervision, it is called Computer Numerical Control (CNC). Computers are the control units of CNC machines, they are built in or linke