Overview of 3D Parametric CAD:

Applications in MAE 3

Dor AshurDr. Nathan Delson

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 tutorial9 Sections meet in Computer lab during week 5

Basics Advantages Difficulties Inventor in MAE 3 Inventor Tutorial

This is NOT 3D CAD !

Inventor Basics:File Types

Sketch

Part: .ipt

Assembly: .iam

Drawing: .idw

Basics Advantages Difficulties Inventor in MAE 3 Inventor Tutorial

Advantage of Solid Modeling:Great Visualization

Helps to communicate concepts and sell ideas

Good for risk reduction

Basics Advantages Difficulties Inventor in MAE 3 Inventor Tutorial

Advantage of Solid Modeling:Model is Parametric

Autocad: : Initial input defines distancesInitial input defines distancesInventor: : A changeable parameter defines the A changeable parameter defines the

position and length of each pointposition 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.

Basics Advantages Difficulties Inventor in MAE 3 Inventor Tutorial

Advantage of Solid Modeling:Automatic and updating drawings

Any changes made to the 3D model automatically are Any changes made to the 3D model automatically are updated in the projectionsupdated in the projections

Basics Advantages Difficulties Inventor in MAE 3 Inventor Tutorial

Changing an object to the left automatically updates all objects to the right

Sketch

Part: .ipt

Assembly: .iam

Drawing: .idw

Advantages of Solid Modeling:3D Rapid Prototyping

3D CAD files can be emailed to 3D rapid prototyping 3D CAD files can be emailed to 3D rapid prototyping facilities, who will then mail back a plastic partfacilities, who will then mail back a plastic part

Yes, model yourself and your personal action figure may soon arrive at your door!!!

Basics Advantages Difficulties Inventor in MAE 3 Inventor Tutorial

Advantage of Solid Modeling:Integrated with 3D Analysis

Finite Element Analysis (FEA) which analyzes stress in Finite Element Analysis (FEA) which analyzes stress in parts is taught in MAE150 and MAE133.parts is taught in MAE150 and MAE133.

Interference between parts can also be calculated.Interference between parts can also be calculated.

Basics Advantages Difficulties Inventor in MAE 3 Inventor Tutorial

Advantages of Solid Modeling:

Basics Advantages Difficulties Inventor in MAE 3 Inventor Tutorial

Great Visualization Automatic and updating drawings Model is parametric Rapid Prototyping 3D Analysis

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 With practice, 3D CAD becomes more intuitive and powerful than 2D CADpowerful than 2D CAD

Basics Advantages Difficulties Inventor in MAE 3 Inventor Tutorial

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.

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 quarters competition for animation examples.

Basics Advantages Difficulties Inventor in MAE 3 Inventor Tutorial

Short Tutorial:Getting Started

Overview of 3D Parametric CAD: Applications in MAE 3Lecture OverviewThis is NOT 3D CAD !Inventor Basics: File TypesAdvantage of Solid Modeling:Great VisualizationAdvantage of Solid Modeling:Model is ParametricAdvantage of Solid Modeling:Automatic and updating drawingsChanging an object to the left automatically updates all objects to the rightAdvantages of Solid Modeling:3D Rapid PrototypingAdvantage of Solid Modeling:Integrated with 3D AnalysisAdvantages of Solid Modeling:Why Learning 3D CAD is Harder than 2D CAD?Which CAD Package is Best?Use of Autodesk Inventor in MAE3Short Tutorial: Getting Started