MAE 455 Computer-Aided Design and DraftingIntroduction to CADWhat Do Those Letters Mean to You?MAE 455 Computer-Aided Design and DraftingPainting “The Big Picture”• What is Computer-Aided Design (CAD)?2MAE 455 Computer-Aided Design and DraftingThe Design Process• What is Computer-Aided Design (CAD)?3MAE 455 Computer-Aided Design and DraftingMore Specific Definitions• Computer-Aided Design (CAD) is the technology concerned with the use of computer systems to assist in the creation, modification, analysis, and optimization of a design. [Groover and Zimmers, 1984]• Computer-Aided Manufacturing (CAM) is the technology concerned with the use of computer systems to plan, manage, and control manufacturing operations.• Computer-Aided Engineering (CAE) is the technology concerned with the use of computer systems to analyze CAD geometry, allowing the designer to simulate and study how the product will behave.4MAE 455 Computer-Aided Design and DraftingModern CAD/CAM/CAE practiceInformation from all product lifecycle activities is available from a single database.5MAE 455 Computer-Aided Design and DraftingPDM and PLM• PDM –is the activity of storing, retrieving, and controlling the use of digital product data shared by multiple users.• PLM –is the strategic, integrated use of diverse software to support all product lifecycle activities of a manufacturing enterprise, from the conception of a product, through design, manufacturing, customer support, and product retirement.6MAE 455 Computer-Aided Design and DraftingComponents of CAD SystemsHardware SoftwareComputing machineData storage devicesCAD/CAM/CAE SystemCommunication devicesUser input devicesUser output devices7Solid ModelingAssembly ModelingMotion SimulationFinite Element AnalysisMAE 455 Computer-Aided Design and DraftingComponents of CAD Systems• Hardware– Computing Machine– Input Devices- -- -- -– Output Devices- -- -- -8MAE 455 Computer-Aided Design and DraftingSolidWorks versus other CAD softwareSiemens PLM NXCatiaPro-EngineerSolidWorksSolidEdgeAutodesk InventorAutoCADDraftingParametric Solid ModelingIntegrated Analysis (dynamic, FEA)Integrated Manufact-uring9MAE 455 Computer-Aided Design and DraftingSolidWorks vs. Catia, Pro-Engineer and Siemens PLM NX• Programs are similar but not equivalent:– Same class of software– Same types of tools available– Same general techniques used in each– Specific buttons, menus and input sequences different– Customer lists different• Today vs. tomorrow– User interfaces will change– Fundamentals will stay the same10MAE 455 Computer-Aided Design and DraftingCourse Goals• Basic and Advanced Shape Modeling• Parametric Modeling• Working in Teams• Advanced Top-Down Design Methodology• Use of Solid Models for Downstream Applications– Design Documentation– Mechanism Analysis– Finite Element Analysis/Shape Optimization– Computer-Aided Manufacturing11MAE 455 Computer-Aided Design and DraftingCourse Expectations• Learning through doing (hands-on learning)• Learning by studying theory• Benefits from course– How to model products well, using state of the art CAD software– Understanding how computer is leveraged in design