數(shù)控技術(shù)概述(已修改)
2025-01-09 01:54 本頁面
【正文】 NUMERICAL CONTROL TECHNOLOGY Chapter 1 Introduction to Numerical Control Teacher Xu Cijun 13872082953 62956 . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Fundamental of NC Technology 、 Classifications of NC Machines 、 Features of Numerical Control and Its Application Areas Course Description: ? NC is one of the most important achievements in mechanical engineering field in 20 century. ? It is a crossing and integrating technology prising of puter technology, automatic control technology, information technology, sense technology, and machining technology. ? Numerical Control Technology has became one of the important technical basic classes of mechanical engineering specialty. Toshiba events . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Development History of NC 1946the first puter appeared in the world, which lift the curtain on the mankind into information time. 1948Parsons Corporation brought forward using puter to control machine when they machined the surface contours of airfoil shape. Parsons Corporation was a minihelicopter manufacturer. The machining accuracy of the airfoil shape was 177。 . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Development History of NC Under the support by the Air Force Responsed by the Servomechanisms Laboratory at the MIT (Massachusetts Institute of Technology) . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Development History of NC Three years later, in 1952 MIT and Parsons Corporation cooperated with each other, and developed the first NC machine which named Cincinnati Hydrotel milling machine. Background, time and place . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Development History of NC The first generation,1952~1955 vacuum tubes, electrical relays and plicated machine control interfaces. The second generation,1955~1959 miniature electronic tubes, transistors. The third generation,1959~1965 small scale integrated circuits. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Development History of NC Above three generations, their NC functions were performed by hardware(electronic circuits), so we call them“ hardwired NC” (硬線數(shù)控 ) 1955 1959 1965 . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Development History of NC The fourth generation,1970s (1970~1974)miniputers. (CNC) The fifth generation,1974 (VLIC) (MCNC) 1994~ PCNC. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Development History of NC After the fourth generations, their NC functions were performed by software(based on puter), so we call them“ softwired NC” or “ puter numerical control” (計(jì)算機(jī)數(shù)控 CNC) 1970 1974 1994 . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Concept of NC and CNC NC (Numerical Control,數(shù)字控制 ) Numerical Control（ NC） is a form of programmable automation in which the mechanical actions of a machine tool or other machines are controlled by a program containing coded alphanumeric data. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Concept of NC and CNC Numerical Control Technology, (數(shù)控技術(shù) ) It means the technology which adopts NC methods to control a work process to realize the automation. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Concept of NC and CNC Numerical Control Machine Tools, (數(shù)控機(jī)床 ) It is a kind of machine tools which adopts the numerical control technology to realize the work process automation. It is a typical example of NC application. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Concept of NC and CNC Numerical Control System, (數(shù)控系
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號-1