數(shù)控技術(shù)概述-在線瀏覽
2025-02-02 01:54本頁(yè)面
【正文】 ) . 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)控系統(tǒng) ) It is the equipment which can realize the numerical control. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Concept of NC and CNC CNC(Computer Numerical Control, 計(jì)算機(jī)數(shù)控 ) The machine control units are based on puter technology. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools The control system of a numerically controlled machine tool can handle many tasks monly done by the operator of a conventional machine. The system has the ability to perform the control functions through the numerical input information, which is the control program, also called the part program. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools The work process of NC is shown as the right figure. Part drawing Part program Control puter Servodrive unit Machine tool Part Firstly, the part programmer should study the part drawing and the process chart. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools The work process of NC is shown in the right figure. Part drawing Part program Control puter Servodrive unit Machine tool Part Then the part programmer should prepare the control program on a standard form in the specified format. It contains all the necessary control information . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC
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