Table Of Contents.docx

Table of Contents 1. Introduction to GT&TC……………………………………………………………………………1 2. Introduction to CNC……………………………………………………………………………….2 2.1 Historical perspective…………………………………………………………………….…….3 2.2 Direct Numerical Control.…………………………………………………………………….5 2.3 Classification of CNC Machine Tools.……………………………………………………….6 2.4 Difference between CNC and Convectional Machine……………………………………….12 2.5 Advantages and Disadvantages of CNC Machine Tools…………………………………….13 2.6 Application of CNC Machine tools………………………………………………………...15 3. Components of CNC Machines.………………………………………………………………….16 3.0 Major Components of CNC System…………………………………………………………16 3.1 Machine Axes Designation.………………………………………………………………….18 3.2Drivees and Mechanisms.…………………………………………………………………….19 4. CNC Tooling.…………………………………………………………………………………….25 4.1 Tool Changing Arrangement………………………………………………………………...25 4.2 Tool Turrets………………………………………………………………………………….26 4.3 Tool Magazines……………………………………………………………………………...27 4.4 Types of Cutting Tool Material……………………………………………………………...30 4.5 Milling Cutters……………………………………………………………………………….31 5. CNC Part Programming.………………………………………………………………………….33 5.1 Programming Fundamentals…………………………………………………………………33 5.2 Fixed Zero and Floating Zero.……………………………………………………………….35 5.3 Types of CNC Codes………………………………………………………………………...35 5.4 Co-ordination System for Turning…………………………………………………………...39