數(shù)控技術(shù)概述(存儲(chǔ)版)
【正文】 rvodrive 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 Machine Tools The work process of NC is shown in the right figure. Part drawing Part program Control puter Servodrive unit Machine tool Part Next the part program is transferred into the control puter(MDI).the puter converts each mand into the signal that the servodrive unit needs . 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 At last , the servodrive unit drives the machine tool to manufacture the finished part . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools A typical NC machine tool has five fundamental units: (1)the input media。 the program of instructions is called a part program. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools The program is coded on a suitable medium for submission to the machine control unit. The mon medium in the past is punched tape, magic tape: . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools Now, The mon medium is diskette, electronic transfer from a puter(RS232C): . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools MCU consists of a microputer and related control hardware that stores the program of instructions and executes it by converting each mand into mechanical actions of machine tool, one mand at a MCU includes system software,calculation algorithm,and transition software to covert the NC parts program into a usable format for the MCU . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools Spindle and feed drive motors and their servoamplifiers are the ponents of the servodrive MCU processes the data and generates discrete numerical position mands for each feed drive and velocity mand for the spindle numerical mands are converted into signal voltage by the MCU unit and sent to servoamplifiers, which process and amplify them to the high voltage levels required by the drive motors. The drives in machine tools are classified as spindle and feed drive mechanisms. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL CLASSIFICATIONS OF NC MACHINE Numerical control machines are classified in different way: (1)The types of NC motion control system。 (2) nonmachine tool applications. It should be noted that the applications are not always identified by the name “ numerical control” , this term is used principally in the machine tool industry. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC Machine Tool Application The most mon applications of NC are in machine tool control, machining was the first application of NC . Machining is a manufacturing process in which the geometry of work is produced by removing excess material. By controlling the relative motion between a cutting tool and the workpiece, the desired geometry is created. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC Machine Tool Application The mon NC machine tools are listed in the following along with their typical features: NC lathe (數(shù)控車床 ) Turning requires twoaxis continuous path control, either to produce a straight cylindrical geometry or to create a profile. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC Machine T
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1