-500x500-500x500.jpg "E_Book Numerical Control of Machine Tools")
| Book Detail | |
| Publication Year | 2005 |
| Edition | 2nd |
| Pages | 310 |
| Preface | |
| Preface | This book has been written with the intent to bridge the gap created by the relevance of the Numerical Control (N/C) subject to three different fields : Electrical engineering, Computer science and Mechanical engineering. Each of these fields is concerned with a different aspect of N/C The electrical or control engineer is concerned with the design of the control loops and the N/C hardware circuitry. The computer scientist might be interested in part-pro-gramming methods to express the geometrical shape of the produced part by a program acceptable to the N/C system. The mechanical engineer is interested in features of N/C machine tools, machining problems and economy as applied to the N/C technology. |
| Table of Contents | |
| Table of Contents | 1 Introduction 1.1 Definitions and Basic Information 1.2. Need and Advantages of N/C 1.3. Classification of N/C systems 1.3.1. Point-to-Point and Contouring 1.3.2. Analogue and Digital Control 1.3.3. Incremental and Absolute Systems 1.3.4. Open-loop and Closed-loop Systems 1.4. Data Feeding Methods 1.4.1. Punched Tape 1.4.2. Magnetic Tape 1.4.3. Plug-board Control Bibliography 2 Machine Tools and Case Studies 2.1. General Construction Requirements 2.1.1. Productivity and N/C 2.1.2. Quality of Machine Tools and the Accuracy of the Workpiece 2.1.3. Thermal Deformations 2.1.4. Static and Dynamic Forces 2.1.5. Special Tool Holders 2.1.6. Economy of N/C Machine Tools 2.2. Metal Removing Machine Tools 2.2.1. Sequence Control 2.2.2. Drilling 2.2.3. Boring 2.3.4. Punching 2.2.5. Turning 2.3. Miscelloneous Applications Biblography 3. Storage and Counting Devices 3.1. Logic Levels 3.2. Time Delay and Shaping 3.3. Binary Storage 3.4. Registers 3.5. Counters and Decoders 4. Devices of N/C Systems 4.1. Driving Devices 4.1.1. Hydraulic Systems 4.1.2. Direct Current (DC) Motors 4.1.3. Stepping Motors (iv) 4.2. Feedback Devices 4.2.1. Encoders 4.2.2. Moire Fringes Digitizer 4.2.3. Resolver 4.3.4. Inductosyn 4.4.5. D.C. Tachometer 4.3. Digital-to-Analogue Converters 4.3.1. Resister Ladder Network 4.3.2. Weighed Resistor Network 1.3.3. D/A Driving an Operational Amplifier 4.4. DDA Intergrator 4.4.1. Principle of Operation 2.4.2. Generation of Basic Functions Bibliography Data Processing Unit 5.1. Data Reading 5.1.1. Tape Reader 5.2. Distributors 5.2.1. Tape Formats 5.2.2. Digital circuits 5.3. Data Conversion 5.3.1. BCD to Binary Conversion 5.3.2. Binary to BCD Conversion 5.4. Interpolator 5.4.1. Linear Interpolation 5.4.2. Circular Interpolation 5.4.3. Complete Interpolator 5.4.4. Parabolic Interpolator Control Loops 6.1. Introduction 6.1.1. Basic Structure of Control Loops 6.1.2. System Resolution 6.2. 6.1.3. Incremental versus Absolute Systems Incremental Open-loop Control 6.2.1. Incremental Closed-loop Control 6.2.2. Direction Sensing Circuit 6.2.3. Absolute Closed Loop Circuit 6.2.4. The Resolver as a Feedback Device Contouring Control Loops 6.3.1. Basic Concepts 6.3.2. Principle of Operation 6.3.3. Mathematical Analysis 6.3.4. Control Loop Based on Phase-Comparison Bibliography 7. Numerical Control Loops 7.1. General Introduction 7.2. Magnetic N/C Systems 7.3. The General Electric Systems 7.4. Photo-Electric Microscope Adjustment 7.5. Philips (Holland) Equipment 7.5.1. Electronic Data Processing 7.6. Dynapath Equipment of Bendix 7.7. The Dialin N/C System by Herbert 7.7.1. Polarized Relay 7.8. The Plessey Continuous Path N/C for Lathes 1.9. Thread Cutting 7.10. The ASEA System 7.11. Special Features of the Cincinnati Acromatic System 7.12. N/C for Printed Circuits Drilling by Guttinger 7.13. Computer Numercial Control 7.14. Geometrical Data Processing 7.15. Interferometric Readout with Lasers 8. Programming 8.1. Introduction 8.2. Manual Programming 8.2.1. Basic Concepts 8.2.1.1. Program Remarks 8.2.2. Tape Format 8.2.3. Contour Programming 8.3. Computer Programs 8.3.1. General Information 8.3.2. Post-Processors 8.3.3. APT Language 8.4. Quality Classification 8.4.1. Characteristics of N/C System 8.4.2. Format Classification Bibliography 9. Computer Control and A/C Systems 9.1. Computer Control Concepts 9.2. DNC Systems 9.3. CNC Systems 9.4. Adaptive Control Systems 9.4.1. ACO Systems 9.4.2. ACC Systems 9.5. The Microprocessor 9.5.1. The Microprocessor 9.5.2. Mircoprocessor in N/C Equipment |