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Numerical Control Systems in Manufacturing: Work Holding Devices and Basics, Slides of Computer Numerical Control

An introduction to numerical control (nc) and computer numerical control (cnc) systems in manufacturing. It discusses the importance of work holding devices for maintaining accuracy and increasing production speed. The document also covers the basic components of an nc system, including the program of instructions, machine control unit, and machine tool.

Typology: Slides

2011/2012

Uploaded on 07/20/2012

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WORK & TOOL HOLDING
DEVICES
In order to maintain the
accuracy of machining process
it is quite necessary to hold the
work piece as well as tool.
For rapid & high quantity
productions these devices are
necessary.
docsity.com
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WORK & TOOL HOLDING

DEVICES

 In order to maintain the accuracy of machining process it is quite necessary to hold the work piece as well as tool.

 For rapid & high quantity productions these devices are necessary.

Examples

1)3 jaw chuck 2)4 jaw chuck

INTRODUCTION

 Due to the increasing demand of production quantity & quality, manufacturers are moving towards new sophisticated equipment & machinery.

 The need is to transfer instructions from man to the machine through automatic devices.

 Manual operators are being replaced by automatic devices.docsity.com

INTRODUCTION

 “NUMERICAL” means, expressing something by numbers.

 “CONTROL” is exercise of directing & guiding power over something.

 “NUMERICAL CONTROL” is directing power over something by using numbers.

Program

Machine Control Unit

Feed back

PROGRAM OF

INSTRUCTIONS

 It is detailed set of directions which tells the machine tool what to do & in what sequence.

 The program is fed to the machine control unit by some input media

e.g.

  • Magnetic Tapes & floppy disks.

MACHINE TOOL

 It performs the useful mechanical work.

 It is simple machine tool ( lathe) that is integrated with control unit.

CNC Machine Tools

 Computer Numerical Control (CNC) - A numerical control system in which the data handling, control sequences, and response to input is determined by an on-board computer system at the machine tool.