Cad cam cae
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This document provides an overview of CAD (computer-aided design), CAM (computer-aided manufacturing), and CAE (computer-aided engineering). It discusses the history and definitions of these terms. CAD involves using computers to assist in the creation, modification, analysis, or optimization of a design. CAM bridges the gap between conceptual design and manufacturing. CAE uses software to simulate engineering problems like stress analysis. The document then discusses CAD topics like boundary representation, constructive solid geometry, function representation, parametric design, and examples of 2D and 3D CAD software.
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Cad cam cae
- 1. CAD - CAM - CAE Casiano Arroyo, Manuel Garrido, Roxana Paredes, Jorge Quino Quispe, Gustavo Sanchez Loayza, Luis Guillermo Tabuchi Yagui, Edgardo Toshiro
- 3. 1.1 History
- 4. 1.1 History
- 5. 1.1 History
- 6. 1.1 History
- 7. 1.1 History
- 8. 1.1 History
- 9. Computer aided design is defined as the integrated use of computer systems to assist in the creation, modification, analysis or optimization of a design. It is the technology concerned with the use of digital computers to perform certain functions in design and production. It is the major element of computer aided engineering. Computer-Aided Design (CAD) Potencialities •Increase productivity •quality improvement •Varity of possible geometries •Reduced design time 1.2 CAD
- 11. NURBs modeling (Non Unifrom Rational B-Splines)
- 12. 1.3 CAM (Computer Aided Manufacturing) •Machining •CNC •Advantages
- 13. 1.4 Computer -Aided Engineering (CAE) Is the use of computer software and hardware in the translation of computer-aided design models into manufacturing instructions for numerical controlled machine tools. Applications CAM takes this one step further by bridging the gap between the conceptual design and the manufacturing of the finished product. For the sake of convenience, a single computer ‘controller’ can drive all of the tools in a single cell. G-code instructions can be fed to this controller and then left to run the cell with minimal input from human supervisors. •stress analysis •vibration analysis •Structural analysis • Noise thermal distortion, etc. •Explicit Dynamics •Fluid Flow •Harmonic Response •Linear Buckling •More applications…
- 14. Process of CAE Example: Stress Analysis •Create a part or an assembly. •Define properties. •Material selection •Define analysis steps. •Define interaction. •Loads. •Mesh •Job. •Visualization.
- 15. 2. CAD 2.1 Theory CAD – Computer Aided Design
- 16. Raster & Vector 2D: Pixel 3D: Voxel 2D: Geometry Figures 3D: Solid Geometry
- 17. 2D: Bezier Curve • Used commonly in 2D Graphic Design softwares.
- 18. 2D: Spline • Used in 2D modeling software
- 19. 2D to 3D
- 20. 3D: CAD
- 21. CAD
- 22. CAD
- 23. Boundary representation (B-Rep) Boundary representation models are composed basically of two parts: Topology: & Geometry
- 24. Boundary representation (B-Rep) • Topology: faces, edges and vertices. • Geometry: surfaces, curves and points. Extended EulerPoincarré formula: Faces + Vertices – Edges – Rings = 2(Shells Holes)
- 25. Boundary representation (B-Rep) • The extended Euler- Poincarré formula allow test the topology for polyhedral solids: Faces = 3 Vertices = 0 Edges = 2 3 + 0 – 2 – 0 … 2 (1 – 0 )
- 26. Constructive solid geometry (CSG) • Primitives: cuboids, cylinders, prisms, pyramids, spheres, cones. • Operations: union, intersection and difference.
- 27. Constructive solid geometry (CSG)
- 28. Constructive solid geometry (CSG) • Infinite cylinder, I: x^2 + y^2 – r^2 <= 0 • Infinite planar halfspace, P: Ax + By + Cz + D <= 0 • Cylinder with ends: I ^ P1 ^ P2
- 29. Constructive solid geometry (CSG)
- 31. Function representation (F-Rep) • The objects defined by a single continuous real-valued function of point coordinates F(x) • The points with F(x) >= 0 belong to the object. • The points with F(x) < 0 are outside of the object. • The point set with F(x)=0 is called an isosurface.
- 32. B-Rep vs F-Rep • Calculating surface area is easy • The model is evaluated • Easy to triangulate the surface • Making pictures is easy • B- rep primitives are local • Calculating volume and mass is easy • The model is unevaluated • Easy to make numerically robust • Input is pretty straightforward • The data structures are compact
- 33. B-Rep vs F-Rep Ray Tracing
- 34. The Z-buffer All commercial systems are BRep. because the the depth buffer or Z-buffer is the predominant technology. The silicon graphics and flight simulator then the computer games impulse that technology. • For each pixel store both colour and depth • Send it 3D coloured triangles in any order • Surfaces in front win
- 35. The CAD softwares – B-Rep • They grew out of 2D drafting • BRep is quick to render on ancient computers.
- 36. parametric design parametric geometry geometrics parametrics parameter 2.2 Parametric Design
- 37. parametric design parametric geometry geometrics parametrics parameter
- 38. parametric design parametric geometry geometrics parametrics parameter reality irreality
- 39. + Matter & Energy - Information - Matter & Energy + Information
- 41. R R A ∏ R =
- 42. A B n… 1 2 A = … B = … 1 = [A+B+….] 2 = [1+B+A…]
- 45. M E I
- 46. new tools new concepts new tools new concepts F. Dyson the evolution of science use
- 50. 2D Softwares: Corel Draw
- 52. 2D: Softwares: Cabri Geometry
- 53. 3D Software: Blender Modeling, animation, created by NeoGeo
- 54. 3D Software: Rhinoceros industrial design, architecture, marine design, automotive design, CAD / CAM, rapid prototyping, reverse engineering, industry as well as graphic design and multimedia
- 57. 3D Software: Pro Engineer
- 61. 3D Software: Solid Edge
- 62. 3D Software: Generative components Parametric CAD software developed by Bentley Systems
- 63. 3D Software: Visual Nastran 4D
- 64. 3D Software: World Craft
- 68. 2.41 Computarization It focuses only in the use of the software. It requires knowledge knowledge about the software and its tools. Example •Model a cylinder
- 69. Method 1 • Create new document. • Create the sketch. • Assign dimensions. • Create the operation Extrusion.
- 70. 2.42 Computation It focuses more in logic than in the use of the software. It requires knowledge of algorithms. Example •Model a cylinder Here a program was created using Visual Basic and the API of Solidworks.
- 71. Method 2
- 72. 2.43 Another Example Example: Model a gear Method 1 • Draw the geometry of gear’s tooth.
- 73. • The geometry of the gear’s teeth is complicated to draw. • Each new gear would be a new problem to solve. • Thus it is strongly recommended to create a routine to create gears with some initial parameters.
- 74. • Creating a program or script. Method 2
- 75. Project Choose an object of the nature. Analize it and create a software or script to generate its geometry.