数控专业毕业设计外文翻译 数控系统发展简史及趋势.docx

附录Numerical control system development brief history andtendency??? In 1946 was born in the world the first electronic accounting machine,this indicated the humanity created has been possible to strengthenand partially to replace the mental labor the tool. It with thehumanity these which in the agriculture, the industry society createdonly is strengthens the physical labor the tool to compare, got up thequantitive leap, entered the information society for the humanity tolay the foundation.?? After 6 years, namely in 1952, the computer technology applied on theengine bed, were born the first numerical control engine bed in US.From this time on, the traditional engine bed has had the archerytarget change. Since nearly half century, the numerical control systemhas experienced two stages and six generation of development. ??? The early computer operating speed is low, was not big to then sciencecomputation and the data processing influence, but could not adapt theengine bed real-time control request. The people can not but usenumeral logic circuit Builds Becomes an engine bedspecial purpose computer to take the numerical control system, iscalled the hardware connection numerical control (HARD-WIRED NC), iscalled for the numerical control (NC). Along with the primary devicedevelopment, this stage has had been through repeatedly threegenerations, namely 1952 first generation of -- electron tube; 1959second-generation -- transistor; 1965 third generation -- small scaleintegration electric circuit.??? To 1970, the general minicomputer already appeared and the massproduction. Thereupon transplants it takes the numerical controlsystem the core part, from this time on entered the computer numericalcontrol (CNC) the stage ( which should have the computer in frontof; General Two characters have abbreviated). To 1971, AmericanINTEL Corporation in the world first time the computer two most corespart -- logic units and the controller, used the large scaleintegrated circuit t