1. Overview of 3D Parametric CAD: Applications in MAE 3 Dor Ashur Dr. Nathan Delson

2. Lecture Overview Inventor Basics Advantages of Solid Modeling (3D CAD)  Great Visualization  Automatic and updating drawings  Model is parametric  Rapid Prototyping  3D Analysis Why 3D CAD is more difficult to learn Use of Autodesk Inventor in MAE3 Inventor tutorial Sections meet in Computer lab during week 5 BasicsAdvantagesDifficultiesInventor in MAE 3Inventor Tutorial

3. This is NOT 3D CAD !

4. Inventor Basics: File Types Sketch Part:.ipt Assembly:.iam Drawing:.idw BasicsAdvantagesDifficultiesInventor in MAE 3Inventor Tutorial

5. Advantage of Solid Modeling: Great Visualization Helps to communicate concepts and sell ideas Good for risk reduction BasicsAdvantagesDifficultiesInventor in MAE 3Inventor Tutorial

6. Advantage of Solid Modeling: Model is Parametric : Initial input defines distances Autocad: Initial input defines distances : A changeable parameter defines the position and length of each point Inventor: A changeable parameter defines the position and length of each point Parts do not have to be redrawn when a design variable is changed late in the design process. Automatically updating models make it easy to create and compare several different configurations. BasicsAdvantagesDifficultiesInventor in MAE 3Inventor Tutorial

7. Advantage of Solid Modeling: Automatic and updating drawings Any changes made to the 3D model automatically are updated in the projections BasicsAdvantagesDifficultiesInventor in MAE 3Inventor Tutorial

8. Changing an object to the left automatically updates all objects to the right Sketch Part:.ipt Assembly:.iam Drawing:.idw

9. Advantages of Solid Modeling: 3D Rapid Prototyping 3D CAD files can be emailed to 3D rapid prototyping facilities, who will then mail back a plastic part Yes, model yourself and your personal action figure may soon arrive at your door!!! BasicsAdvantagesDifficultiesInventor in MAE 3Inventor Tutorial

10. Advantage of Solid Modeling: Integrated with 3D Analysis Finite Element Analysis (FEA) which analyzes stress in parts is taught in MAE150 and MAE133.Finite Element Analysis (FEA) which analyzes stress in parts is taught in MAE150 and MAE133. Interference between parts can also be calculated.Interference between parts can also be calculated. BasicsAdvantagesDifficultiesInventor in MAE 3Inventor Tutorial

11. Advantages of Solid Modeling: BasicsAdvantagesDifficultiesInventor in MAE 3Inventor Tutorial  Great Visualization  Automatic and updating drawings  Model is parametric  Rapid Prototyping  3D Analysis

12. Why Learning 3D CAD is Harder than 2D CAD ? 3D Solid modeling requires a different way of thinking: The mouse and screen are in 2D yet every point, line, and plane in a solid model requires both x, y, and z information Effective parametric modeling requires the user to to anticipate what changes might occur A 3d model must be made of closed sketches, so the computer can tell the inside from the outside of a model. With practice, 3D CAD becomes more intuitive and powerful than 2D CAD BasicsAdvantagesDifficultiesInventor in MAE 3Inventor Tutorial

13. Which CAD Package is Best? CAD companies change constantly A new great product may be out of the market place 5 years down the road. Inventor, SolidWorks and ProE all use the same approach but have slightly different user interfaces. All three are available in the computer labs if you want to check them out Only Inventor will be taught and used in this class. Learning to use a 3D parametric model now, will allow you to pick up another package quickly.

14. Use of Autodesk Inventor in MAE3 Creating a single part (week 5) Assemblies (week 6) Animations (week 8) Each team will make a full Inventor model of their robot and make an animation of the robot in action!! – See Fall quarter’s competition for animation examples. BasicsAdvantagesDifficultiesInventor in MAE 3Inventor Tutorial

15. Short Tutorial: Getting Started