导读 1
Unit One The Foundation of Metalworking 3
Passage One Classification of Metals 3
Passage Two Properties of Metals and Heat Treatment of Steel 6
Passage Three Metal Hot Working 11
Passage Four Metalworking Machine Tool 16
Unit exercises 19
Word building 20
Unit Two Machine Manufacturing Engineering 22
Passage One The Basic Machining Techniques 22
Passage Two Casting 25
Passage Three Dimension and Tolerance 30
Passage Four Forming 33
Unit exercises 38
Word building 39
Unit Three Mechanical Design 40
Passage One Gears 40
Passage Two Introduction to Design of Mechanism Systems 44
Passage Three Selection of Mechanisms 49
Passage Four CAD and CAM 53
Unit exercise 58
Word building 59
Unit Four Electric Part 61
Passage One Series and Parallel DC Networks 61
Passage Two Potentiometers 66
Passage Three Programmable Logic Controllers 71
Passage Four Use of Sensors in Programmable Automation 74
Unit exercises 78
Word building 78
Unit Five CNC 80
Passage One Classification of Numerical Control Machines 80
Passage Two Machining Centers 86
Passage Three CNC Turning Center and the PC300 Mill 90
Passage Four Advantages and Disadvantages of NC 94
Unit exercise 97
Word building 98
Unit Six Modern Manufacturing Technology 99
Passage One Computer Aided Manufacturing 99
Passage Two Introduction to Flexible Manufacturing 102
Passage Three Computer-Integrated Manufacturing 109
Passage Four The EDM Process 114
Unit exercises 117
Word building 118