2/12/2015. Sharif University of Technology. Session # 4. Instructor. Class time. Course evaluation. Department of Industrial Engineering
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1 Advanced Manufacturing Laboratory Department of Industrial Engineering Sharif University of Technology Session # 4 Instructor Omid Fatahi Valilai, Ph.D. Industrial Engineering Department, Sharif University of Technology FValilai@sharif.edu, Tel: Website: Sharif.edu/~fvalilai Class time Saturday- Monday 10:30-12:00 Course evaluation Mid-term (25%) Final exam (40%) Quiz (5%) Exercise (30%) 2 1
2 Mid-term session: Monday: 8 th Ordibehesht 1393, 10:30 ~ 12:30 Final Exam: Saturday: 24 th Khordad 1393, 15:00 ~ 17:30 Reference: Lee, Kunwoo; Principles of CAD/CAM/CAE systems, 1999, Addsion Wesley Abouel Nasr, Emad; Kamrani, Ali K.; Computer-Based Design and Manufacturing: An Information-Based Approach, 2007, Springer, New York Benhabib, Beno; Manufacturing: Design, Production, CAD/CAM, and Integration, 2003, Marcel Dekker Inc, New York Radhakrishnan, P.; Subramanian, S.; Raju, V.; CAD/CAM/CIM, 3rd edition, 2005, New age international (P) limited publishers, New York 3 Contents: Introduction to CAD/CAM/CAE systems Components of CAD/CAM/CAE systems Geometric modeling systems Optimization in CAD Rapid prototyping and manufacturing Virtual engineering Product Life Cycle Cost Model Computer-Based Design and Features/Methodologies of Feature Representations Feature-Based Process Planning and Techniques Collaborative Engineering (5 sessions) (3 sessions) (5 sessions) (3 sessions) (5 sessions) (3 sessions) 5 2
3 Contents: Components of CAD/CAM/CAE systems Hardware components Hardware configurations Software components CAD/CAM systems 6 7 3
4 3D Modeling in CAD/CAM In a CAD/CAM system, the first goal is to create a geometric model of an object. Such a model serves as a digital representation, in a computer, that we can use later for a variety of enginee1ing activities such as analysis and manufacturing. The representation is well structured in the model database, and the database structured content is stored in the part file of the model. 8 3D Modeling in CAD/CAM Solid models are what CAD/CAM systems use. A solid model is a complete, unique, and unambiguous representation of an object. The model resembles the object. An object, such as a cube, has sides (6), edges (12), and comers (8). Its corresponding solid model has faces, edges, and vertices to represent its sides, edges, and comers, respectively 9 4
5 3D Modeling in CAD/CAM While all CAD/CAM systems create parametric solid models, CAD designers can create the models in different ways. We identify three modeling approaches that designers can choose from to create solid models. Primitives, Features, and Sketching. 10 Wireframe modeling systems This system represent a shape by its characteristics lines and end points. The system uses lines and points to display three-dimensional shapes and allow manipulation of the shapes by modifying the lines and points. 11 5
6 Surface modeling In this approach, a component is represented by its surfaces which in turn are represented by their vertices and edges. 12 Surface modeling Standard surface types available for surface modeling: box, pyramid, wedge, dome, sphere, cone, torus, dish and mesh 13 6
7 There are six common representations in solid modeling. Spatial Enumeration Cell Decomposition Boundary Representation Sweep Methods Primitive Instancing Constructive Solid Geometry (CSG) 14 Constructive Solid Geometry (CSG) In a CSG model, physical objects are created by combining basic elementary shapes known as primitives like blocks, cylinders, cones, pyramids and spheres. The Boolean operations like union ( ), difference ( ) and intersection are used to carry out this task. 15 7
8 Constructive Solid Geometry (CSG) In a CSG model, physical objects are created by combining basic elementary shapes known as primitives like blocks, cylinders, cones, pyramids and spheres. The Boolean operations like union ( ), difference ( ) and intersection are used to carry out this task. 16 Operations Boolean operations Sweeping Skinning Rounding Lifting 17 8
9 Boundary Representation (B-rep) Boundary representation is built on the concept that a physical object is enclosed by a set of faces which themselves are closed and oriented surfaces. Geometric entities -- Topological entities Point -- Vertex Curve, line -- Edge Surface -- Face 18 9
3/3/2014. Sharif University of Technology. Session # 5. Instructor. Class time. Course evaluation. Department of Industrial Engineering
Advanced Manufacturing Laboratory Department of Industrial Engineering Sharif University of Technology Session # 5 Instructor Omid Fatahi Valilai, Ph.D. Industrial Engineering Department, Sharif University
5/25/2014. Sharif University of Technology. Session # 19. Instructor. Class time. Course evaluation. Department of Industrial Engineering
Advanced Manufacturing Laboratory Department of Industrial Engineering Sharif University of Technology Session # 19 Instructor Omid Fatahi Valilai, Ph.D. Industrial Engineering Department, Sharif University
4/26/2014. Sharif University of Technology. Session # 11. Instructor. Class time. Course evaluation. Department of Industrial Engineering
Advanced Manufacturing Laboratory Department of Industrial Engineering Sharif University of Technology Session # 11 Instructor Omid Fatahi Valilai, Ph.D. Industrial Engineering Department, Sharif University
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