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1.2Process of Computer Aided Design2
1.3Process of Computer Aided Manufacturing5
Assignments20
Chapter 2Solid Modeling22
2.1An Overview of Solid Modeling22
2.1.1Concept of Solid Modeling22
2.1.2Application of Solid Modeling22
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
2.10Reverse 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
3.4.6Modeling Based on Associativity94
3.5Trends of Solid Modeling95
3.5.1Direct Modeling97
3.5.2Synchronous Technology98
3.5.3Integrated Modeling Approach100
Assignments100
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 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
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
5.5.4Theory 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

1.2计算机辅助设计过程2
1.3计算机辅助制造过程5

2.1实体建模概述22
2.1.1实体建模的概念22
2.1.2实体模型的应用22
2.1.3实体建模的优点23
2.2实体模型的表示方法24
2.3线框模型25
2.4表面模型26
2.4.1表面模型简介26
2.4.2曲线的参数化表示26
2.4.3样条曲线简介28
2.4.4Bézier曲线/曲面29
2.4.5有理Bézier曲线31
2.4.6B样条曲线/曲面31
2.4.7NURBS（非圴匀有理样条曲线）36
2.4.8B样条曲线到NURBS曲线的泛化38
2.4.9直观理解NURBS40
2.4.10曲线/曲面表示方法选择44
2.4.11光顺性45
2.4.12NURBS曲线/曲面的应用47
2.4.13基于三角网格化的曲面48
2.5实体模型50
2.6实体模型的创建方案51
2.7CSG树51
2.8边界模型54

2.8.2翼边数据结构55
2.8.3有孔表面的边界模型58
2.8.4精确边界模型和近似边界模型58
2.8.5边界模型的优缺点59
2.9扫描/扫掠法59
2.10反求工程/逆向工程61
2.10.1简介61
2.10.2反求工程流程62
2.10.3反求工程硬件设备63
2.10.4点云数据的处理65
2.10.5反求工程软件65
2.10.6反求工程的应用67
2.10.7反求工程建模方法69

3.1特征设计简介79
3.1.1特征定义79
3.1.2特征的获取81
3.1.3特征设计的意义83
3.2参数化建模技术84
3.3变量几何技术84
3.4.1特征建模85
3.4.2基于历史的建模85
3.4.3参数化建模88
3.4.4约束建模89
3.4.5设计意图建模92
3.4.6关联建模94
3.5实体建模的发展趋势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

4.1简介103
4.2初始图形交换标准104
4.2.1简介104
4.2.2IGES文件结构106
4.2.3基本的IGES实体108
4.2.4IGES文件实例109
4.2.5IGES的局限性110
4.3产品模型数据交换标准110
4.3.1简介110
4.3.2STEP文件实例分析111
4.4STEPNC113
4.4.1简介113
4.4.2研究和发展114
4.4.3STEPNC115
4.4.4STEPNC数据模型118
4.4.5STEPNC应用案例：SPAIM120
4.4.6STEPNC的好处123
4.4.7未来的发展124
4.5特征识别125
4.5.1简介125
4.5.2历史回顾127
4.5.3制造/加工特征127
4.5.4特征识别129
4.5.5自动特征识别133
4.5.6商用特征识别系统133
4.6成组技术134
4.6.1概念134
4.6.3确定零件族的方法135
4.6.4设计良好的分类和编码系统的好处140
4.6.5加工单元设计——GT单元的种类140
4.6.6成组技术的好处140
4.6.7成组技术存在的问题140

5.1简介145
5.2面临的主要问题147
5.3计算机集成制造子系统148
5.4应用149
5.5柔性制造系统149
5.5.1简介149
5.5.2柔性制造系统的概念150
5.5.3柔性制造系统的优缺点151
5.5.4柔性制造系统的理论152
5.5.5工作站154
5.5.6柔性及其类型164
5.5.7柔性制造系统的类型165
5.5.8五种柔性制造系统布局168
5.5.9柔性制造系统的应用170
5.5.10发展趋势170
5.6其他相关技术172
5.6.1精益制造172
5.6.2准时化生产173