Computer Based Design and Manufacturing (eBook)

Contents 11
List of Figures 19
List of Tables 23
Part I: Product Design 25
Chapter 1 Product Development Life Cycle 26
1.1 Introduction 26
1.2 The Evolution of Product Development 26
1.3 Sequential Product Development 28
1.4 Simultaneous/Integrated Product Development 29
1.5 Generic Product Development Process 30
1.6 Case Study - Needs Recognition: A Utility Snip 42
1.7 Summary 53
1.8 Problems 53
Chapter 2 Product Life Cycle Cost Model 54
2.1 Introduction 54
2.2 Role of Computers in Manufacturing Systems 56
2.3 Product Life Cycle Cost Analysis 56
2.4 Computer- Aided Cost Estimating in Manufacturing 71
2.5 Objective of Cost Estimating 71
2.6 Methods of Cost Estimating 73
2.7 Computer- Aided Cost Estimating 78
2.8 Structure of a Computer- Assisted Cost Estimating System 78
2.9 Summary 81
2.10 Problems 81
Part II: Feature- Based Design and Techniques 82
Chapter 3 Computer- Based Design and Features 83
3.1 Introduction 83
3.2 CAD and CAM Integration 84
3.3 Feature- Based Technologies 88
3.4 The New Methodology Objectives 91
3.5 Problems 92
Chapter 4 Methodologies of Feature Representations 93
4.1 Feature Definitions 93
4.2 Features in Manufacturing 94
4.3 Geometric Data Format 99
4.4 Boundary Representation ( B- rep) 110
4.5 Constructive Solid Geometry ( CSG) 113
4.6 Advantages and Disadvantages of ( CSG) and B- rep 116
4.7 Feature Recognition 117
4.9 What Are Feature Interactions? 119
4.10 Summary 120
4.11 Problems 121
Chapter 5 Feature Extraction Techniques 123
5.1 Feature Representation 123
5.2 Feature Recognition Techniques 127
5.3 Summary 145
5.4 Problems 145
Chapter 6 Initial Graphics Exchange Specifications (IGES) 147
6.1 Data Transfer in CAD/ CAM Systems 147
6.2 Initial Graphics Exchange Specifications (IGES) 148
6.3 Summary 152
6.4 Problems 152
Chapter 7 Intelligent Feature Recognition Methodology 153
7.1 Introduction 153
7.2 Conversion of CAD Data Files to Object- Oriented Data Structure ( OODS) 154
7.3 The Overall Object- Oriented Data Structure of the Proposed Methodology 159
7.4 Summary 200
7.5 Problems 200
Chapter 8 Feature Interaction Methodology 202
8.1 Feature Interaction 202
8.2 The General Algorithm for Extraction of Interacting Features 219
8.3 Summary 221
8.4 Problems 221
Part III: Feature- Based Process Planning and Techniques 223
Chapter 9 Mapping the Extracted Manufacturing Features to Process Planning 224
9.1 Introduction 224
9.2 Machining Operations 224
9.3 Machining Sequence Procedure 225
9.4 Machining Direction Procedure 226
9.5 Machining Information Procedure 228
9.6 Summary 232
9.7 Problems 232
Chapter 10 Intelligent Feature Recognition Methodology ( IFRM) Implementation 234
10.1 CAD Interface for the IFRM System 234
10.2 Feature Recognition Stage 235
10.3 Illustrative Example 1 238
10.4 Illustrative Example 2 244
10.5 Illustrative Example 3 256
10.6 Illustrative Example 4 275
10.7 Advantages of IFRM Methodology 292
10.8 Limitations of IFRM Methodology 293
10.9 Recommendations for Future Work 293
10.10 Summary 294
Part IV: Advanced Topics 297
Chapter 11 Rapid Prototyping 298
11.1 Introduction 298
11.2 BeneHts of Rapid Prototyping Technology 300
11.3 Rapid Prototyping Terminology 301
11.4 Rapid Prototyping Systems 302
11.5 Summary 318
11.6 Problems 318
Chapter 12 Collaborative Engineering 319
12.1 Introduction 319
12.2 Product Design and Development Process 320
12.3 Collaborative Engineering Approach 322
12.4 Role of Collaboration in IPD 323
12.5 Product Development Teams (PDTs) and Collocation 324
12.6 Effectiveness of PDT 325
12.7 Product Design in a Collaborative Environment 326
12.8 Integrated Product Design and Development in a Collaborative Environment 329
12.9 Summary 336
12.10 Problems 336
References 338
Index 353