CAD/CAM原理與套用（英文版）CAD/CAMPrinciplesandApplications

內容簡介

本書以實體模型、表面模型、特徵及參數化模型的建府轎熱遷模原理、CAD/CAM的集海墊遙成問題、計算機集斷探成製造系統為主線，闡述了CAD/CAM領域內技術原理及套用，並將CAD領域敬體雅的另一分支逆向工程技和堡棗術編入其中，以反映CAD技術的全貌，在CAD/CAM的集成方面引入了新閥請懂臭的STEP-NC及特徵的識別技術。

圖書目錄

Chapter 1An Overview of CAD/CAM1

1.1Concept of CAD/CAM1

1.2Process of ComputerAided Design2

1.3Process of Computer檔汗灑Aided Manufacturing5

1.4Integration of CAD/CAM6

1.5CAD Environment8

1.5.1CAD Hardware8

1.5.2CAD Software10

1.6Applications of CAD/CAM12

1.7History and Trends of CAD/CAM16

Assignments20

Chapter 2Solid Modeling22

2.1An Overview of Solid Modeling22

2.1.1Concept of Solid Modeling22

2.1.2Application of Solid Modeling22

2.1.3Advantages of Solid Modeling23

2.2Solid Model Representation24

2.3Wireframe Model25

2.4Surface Model26

2.4.1Introduction to Surface Model26

2.4.2Mathematic Representations of Curves26

2.4.3Introduction to Splines28

2.4.4Bézier Curves/Surfaces29

2.4.5Rational Bézier Curves31

2.4.6BSpline Curves/Surfaces31

2.4.7NURBS36

2.4.8Generalization of BSpline to NURBS38

2.4.9Intuitive Understanding of NURBS40

2.4.10Choosing a Representation44

2.4.11Smoothness45

2.4.12Applications of NURBS Curves/Surfaces47

2.4.13Surfaces Based on Triangle Meshes48

2.5Solid Model50

2.6Solid Model Creation Scheme51

2.7Constructive Solid Geometry Scheme51

2.8Boundary Representation (BRep) Scheme54

2.8.1Boundary Representation54

2.8.2The WingedEdge Data Structure55

2.8.3Faces Have Holes58

2.8.4Exact BRep and Faceted BRep58

2.8.5Advantages and Disadvantages of BRep59

ContentsCAD/CAM原理與套用（英文版）2.9Sweeping Scheme59

2.10Reverse Engineering61

2.10.1Introduction61

2.10.2Process of Reverse Engineering62

2.10.3Reverse Engineering Hardware63

2.10.4Point Cloud Data Processing65

2.10.5Reverse Engineering Software65

2.10.6Reverse Engineering Application67

2.10.7Reverse Engineering Modeling Method69

Assignments76

Chapter 3FeatureBased Modeling79

3.1Introduction to FeatureBased Design79

3.1.1Feature Definitions79

3.1.2How to Obtain Application Features81

3.1.3The Significance of FeatureBased Design83

3.2Parametric Modeling Technology84

3.3Extended Variational Technology84

3.4Main Features of Parametric FeatureBased CAD System85

3.4.1Modeling Based on Features85

3.4.2Modeling Based on History85

3.4.3Modeling Based on Parameters88

3.4.4Modeling Based on Constraints89

3.4.5Modeling Based on Design Intent92

3.4.6Modeling Based on Associativity94

3.5Trends of Solid Modeling95

3.5.1Direct Modeling97

3.5.2Synchronous Technology98

3.5.3Integrated Modeling Approach100

Assignments100

Chapter 4CAD/CAM Integration103

4.1Introduction103

4.2Initial Graphics Exchange Specifications104

4.2.1Introduction104

4.2.2Structure of IGES Files106

4.2.3Basic IGES Entities108

4.2.4An Example of IGES Files109

4.2.5Limitations of IGES110

4.3Standard for the Exchange of Product Model Data110

4.3.1Introduction110

4.3.2An Example of STEP Files111

4.4STEPNC113

4.4.1Introduction113

4.4.2Research and Development114

4.4.3STEPNC115

4.4.4STEPNC Data Model118

4.4.5STEPNC Application Case Study: SPAIM120

4.4.6Benefits of STEPNC 123

4.4.7Future Development124

4.5Feature Recognition125

4.5.1Introduction125

4.5.2Historical Perspective127

4.5.3Manufacturing/Machining Features127

4.5.4Feature Recognition129

4.5.5Automatic Feature Recognition133

4.5.6Commercial Feature Recognition Systems133

4.6Group Technology134

4.6.1Concept134

4.6.2The Role of Group Technology in CAD/CAM Integration134

4.6.3Ways to Identify Part Family135

4.6.4Benefits of a WellDesigned Classification and Coding System140

4.6.5Machine Cell Design—Types of GT Cells140

4.6.6Benefits of Group Technology140

4.6.7Problems in Group Technology140

4.7Benefits of Integrated CAD/CAM141

Assignments142

Chapter 5ComputerIntegrated Manufacturing System145

5.1Introduction145

5.2Key Challenges147

5.3Subsystems in ComputerIntegrated Manufacturing148

5.4Application149

5.5Flexible Manufacturing System149

5.5.1Introduction149

5.5.2Concept of Flexible Manufacturing System150

5.5.3Advantages and Disadvantages of Flexible Manufacturing System151

5.5.4Theory of Flexible Manufacturing System152

5.5.5Workstations154

5.5.6Flexibility and Its Type164

5.5.7Types of FMS165

5.5.8Five Types of FMS Layouts168

5.5.9Application of FMS170

5.5.10Recent Trends170

5.6Other Technologies172

5.6.1Lean Manufacturing172

5.6.2Just In Time173

Assignments176

Appendix179

References184

目錄前言

第1章CAD/CAM概述1

1.1CAD/CAM的概念1

1.2計算機輔助設計過程2

1.3計算機輔助製造過程5

1.4CAD/CAM的集成6

1.5CAD軟體8

1.5.1CAD硬體8

1.5.2CAD軟體10

1.6CAD/CAM的套用12

1.7CAD/CAM的歷史及未來發展趨勢16

作業20

第2章實體建模22

2.1實體建模概述22

2.1.1實體建模的概念22

2.1.2實體模型的套用22

2.1.3實體建模的優點23

2.2實體模型的表示方法24

2.3線框模型25

2.4表面模型26

2.4.1表面模型簡介26

2.4.2曲線的參數化表示26

2.4.3樣條曲線簡介28

2.4.4Bézier曲線/曲面29

2.4.5有理Bézier曲線31

2.4.6B樣條曲線/曲面31

2.4.7NURBS（非圴勻有理樣條曲線）36

2.4.8B樣條曲線到NURBS曲線的泛化38

2.4.9直觀理解NURBS40

2.4.10曲線/曲面表示方法選擇44

2.4.11光順性45

2.4.12NURBS曲線/曲面的套用47

2.4.13基於三角格線化的曲面48

2.5實體模型50

2.6實體模型的創建方案51

2.7CSG樹51

2.8邊界模型54

目錄CAD/CAM原理與套用（英文版）2.8.1邊界模型的表示法54

2.8.2翼邊數據結構55

2.8.3有孔表面的邊界模型58

2.8.4精確邊界模型和近似邊界模型58

2.8.5邊界模型的優缺點59

2.9掃描/掃掠法59

2.10反求工程/逆向工程61

2.10.1簡介61

2.10.2反求工程流程62

2.10.3反求工程硬體設備63

2.10.4點雲數據的處理65

2.10.5反求工程軟體65

2.10.6反求工程的套用67

2.10.7反求工程建模方法69

作業76

第3章參數化特徵建模技術79

3.1特徵設計簡介79

3.1.1特徵定義79

3.1.2特徵的獲取81

3.1.3特徵設計的意義83

3.2參數化建模技術84

3.3變數幾何技術84

3.4參數化特徵CAD系統的主要特點85

3.4.1特徵建模85

3.4.2基於歷史的建模85

3.4.3參數化建模88

3.4.4約束建模89

3.4.5設計意圖建模92

3.4.6關聯建模94

3.5實體建模的發展趨勢95

3.5.1直接建模97

3.5.2同步建模98

3.5.3集成建模方法100

作業100

第4章CAD/CAM集成技術103

4.1簡介103

4.2初始圖形交換標準104

4.2.1簡介104

4.2.2IGES檔案結構106

4.2.3基本的IGES實體108

4.2.4IGES檔案實例109

4.2.5IGES的局限性110

4.3產品模型數據交換標準110

4.3.1簡介110

4.3.2STEP檔案實例分析111

4.4STEPNC113

4.4.1簡介113

4.4.2研究和發展114

4.4.3STEPNC115

4.4.4STEPNC數據模型118

4.4.5STEPNC套用案例：SPAIM120

4.4.6STEPNC的好處123

4.4.7未來的發展124

4.5特徵識別125

4.5.1簡介125

4.5.2歷史回顧127

4.5.3製造/加工特徵127

4.5.4特徵識別129

4.5.5自動特徵識別133

4.5.6商用特徵識別系統133

4.6成組技術134

4.6.1概念134

4.6.2成組技術在CAD/CAM集成中的作用134

4.6.3確定零件族的方法135

4.6.4設計良好的分類和編碼系統的好處140

4.6.5加工單元設計——GT單元的種類140

4.6.6成組技術的好處140

4.6.7成組技術存在的問題140

4.7CAD/CAM集成的好處141

作業142

第5章計算機集成製造系統145

5.1簡介145

5.2面臨的主要問題147

5.3計算機集成製造子系統148

5.4套用149

5.5柔性製造系統149

5.5.1簡介149

5.5.2柔性製造系統的概念150

5.5.3柔性製造系統的優缺點151

5.5.4柔性製造系統的理論152

5.5.5工作站154

5.5.6柔性及其類型164

5.5.7柔性製造系統的類型165

5.5.8五種柔性製造系統布局168

5.5.9柔性製造系統的套用170

5.5.10發展趨勢170

5.6其他相關技術172

5.6.1精益製造172

5.6.2準時化生產173

作業176

附錄179

參考文獻184

CAD/CAM原理與套用（英文版）CAD/CAMPrinciplesandApplications

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圖書目錄

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