Overview

Course Objective 1: To grasp the structural principles and working mechanisms of CNC machines and CNC systems, and to be able to identify the structure of typical CNC machines, CNC devices, servo drive systems, and parameters.

Course Objective 2: To analyze typical parts for CNC machining processes, compile CNC machining programs; to develop different CNC machining plans, and to use machining simulation software to verify these plans.

Course Objective 3: To select CNC machining software for modeling, generate machining paths, and verify and analyze the correctness and rationality of these paths; to understand the basic principles of CNC interpolation, and to implement the interpolation process using programs based on the principles of CNC interpolation.

Syllabus

Chapter 1 Introduction

1.1.1 The Generation and history of CNC Machine Tools
1.1.2 The characteristic of CNC Machine Tools
1.2.1 The Components of CNC Machine Tools
1.2.2 The Characteristics and Application of CNC Machine Tools
1.2.3 Application of CNC Machine Tools
1.3 Classification of CNC Machine Tools

Chapter 2 CNC Programming

2.1.1 The Basic Concept of CNC Machining Programming
2.1.2 Steps of CNC programming
2.1.3 The Method of CNC Programming
2.1.4 The Structure of CNC Program
2.1.5.1 The Codes of CNC Program
2.1.5.2 The Codes of CNC Program
2.2.1 Coordinate Axis and Motion Direction of CNC Machine Tools
2.2.2 Machine Coordinates and Workpiece Coordinates
2.3.1 Basic Programming Instructions
2.3.2 Instructions Related to Coordinates
2.3.3 Feed Control Instructions-G00，G01
2.3.4 Feed Control Instructions-G02,G03
2.3.5 Tool Compensation Function
2.3.6 Command for tool compensation
2.3.7 Tool length compensation
2.4.1 Process Treatment
2.4.2 Selection of cutting tool
2.4.3 Determination of Cutting Parameters
2.4.4 Division of Operation and Working Step
2.4.5 Determination of machining route
2.5 Numerical Calculation in CNC Programming
2.6.1 Programming for CNC Lathe -1
2.6.2 Programming for CNC Lathe -2 Repetitive cycles for lathe
2.6.3 canned cycle fof lathe
2.7 Hole Operation

Chapter 3 CNC system

3.1.1 The Composition and Function of CNC System
3.1.2 The Composition and Function of CNC System(CONT.)
3.1.3 The Working Process of CNC System
3.2 Single-microprocessor and Multi-microprocessor Architectures
3.3.1 The Software Structure of CNC System
3.3.2 interrupt structure and foreground-background architecture

chapter 4 Interpolation of CNC

4.1 Overview of the Interpolation Principle
4.2 Point-by-point comparison method
4.3 DDA method
4.4 Sampled-Data interpolation method

chapter 5 Servo System for CNC Machine Tools

5.1.1 Concept and classification of Servo System for CNC Machine Tools
5.1.2 Basic Requirements of servo system
5.2.1 Structure and Working Principle
5.2.2 Working process of stepper motor
5.2.3 characteristics
5.2.4 Stepper Motor Drivers
5.3.1 The Structure and Working Principle of DC Servo Motor
5.3.2 The Speed Regulation Principle and Method of DC Servo Motor
5.3.3 PWM speed regulation for DC servo motor
5.4.1 Introduction to AC Servo Motor
5.4.2 Speed regulation for AC servo motor

chapter 6 Position Detection Device for CNC machine tool

6.1 Classification and Requirements of Position Detection Device
6.2 Resolver
6.3 Inductosyn
6.4 Rotary encoders
6.5 Grating Ruler

chapter 7 Mechanical structure of the CNC machine tool

7.1 Characteristics and Requirements of the CNC machine tool for mechanical structure
7.2 Current common types and layout of CNC machine tools
7.3.1 Main drive system
7.3.2 main drive system(Cont.)
7.4.1Feed drive system
7.4.2 Feed drive system(cont)