1、 广西工学院鹿山学院 毕业设计 外文 翻译 题 目： 数控机床改造 系 别： 机械工程系 专业班级： 数控 081 班 姓 名： 杨辉猛 学 号： 20081163 指导教师： 李启袭 二 一二 年 二 月 十五 日 The Numerical Control Engine Bed Transforms First numerical control system development summary brief history and tendency In 1946 the first electronic accounting machine was born in the world
2、, this indicated the humanity created has been possible to strengthen and partially to replace the mental labor the tool. It with the humanity these which in the agriculture, the industry society created only is strengthens the physical labor the tool to compare, got up the quantitive leap, entered
3、the information society for the humanity to lay the foundation. After 6 years, in 1952, computer technology applied to the engine bed , the first numerical control engine bed were born in US. From this time on, the traditional engine bed has had the archery target change. Since nearly half century,
4、the numerical control system has experienced two stages and six generation of development. 1.1 Numerical control (NC) stage (1952 1970) The early computer operating speed is low, was not big to then science computation and the data processing influence, but could not adapt the engine bed real-time c
5、ontrol request. The people can not but use numeral logic circuit to build to become an engine bed special purpose computer to take the numerical control system, is called the hardware connection numerical control (HARD-WIRED NC), Jian Chengwei numerical control (NC). Along with the primary device de
6、velopment, this stage has had been through repeatedly three generations, namely 1952 first generation of - electron tube； 1959 second generation of - transistor； 1965 third generation - small scale integration electric circuit. 1.2 Computer numerical control (CNC) stage (in 1970 present) In 1970, th
7、e general minicomputer already appeared and the mass production. Thereupon transplants it takes the numerical control system the core part, from this time on entered the computer numerical control (CNC) the stage (which should have computer in front of the general two characters to abbreviate). In 1
8、971, American INTEL Corporation in the world first time the computer two most cores part - logic units and the controller, used the large scale integrated circuit technology integration on together the chip, called it the microprocessor (MICROPROCESSOR), also might be called the central processing e
9、lement (to be called CPU). The microprocessor is applied to 1974 in the numerical control system. This is because minicomputer function too strong, controlled an engine bed ability to have wealthily (therefore once uses in controlling the multi- Taiwan engine bed at that time, called it group contro
10、l), was inferior to used the microprocessor economy to be reasonable. Moreover then small machine reliability was not ideal. The early microprocessor speed and the function although insufficiently are also high, but may solve through the multi-processor structure. Because the microprocessor is the g
11、eneral-purpose calculator core part, therefore still was called the computer numerical control. In 1990, PC machine (personal computer, domestic custom had called microcomputer) the performance has developed to the very high stage, may satisfiedly take the numerical control system core part the requ
12、est. The numerical control system henceforth entered based on the PC stage. In brief, the computer numerical control stage has also experienced three generations. Namely 1970 fourth generation of - minicomputer； 1974 five dynasties - microprocessor and 1990 sixth generation - (overseas was called PC
13、-BASED) based on PC. Also must point out, although overseas already renamed as the computer numerical control (namely CNC). Also must point out, although overseas already renamed as the computer numerical control (namely CNC), but our country still the custom called the numerical control (NC). There
14、fore we daily say numerical control, the materially already was refers to computer numerical control. 1.3 the numerical control future will develop tendency 1.3.1 open style continues to, to develop based on the PC sixth generation of direction The software and hardware resources has which based on
15、PC are rich and so on the characteristic, the more numerical controls serial production factory can step onto this path. Uses PC machine to take at least its front end machine, processes the man-machine contact surface, the programming, the association Question and so on net correspondence, undertakes the numerical control duty by
