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MEE 104L Lesson 1

Course Introduction,3D CAD Basics & Inventor Interface

Tuesday, January 17, 2012

Jamie ObermeyerUniversity of Dayton

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MEE 104L Introduction

1. Personal Introduction

2. Review Syllabus

3. 3D CAD Basics

4. Autodesk Inventor Interface Review

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Personal IntroductionName: Jamie Obermeyer

Hometown: Batesville, Indiana

Now Live In: Oakwood, Ohio

Education: Bachelor of Mechanical Engineering

Kettering University, Flint, MI

Master of Science Mgmt. of Technology

Rensselaer Polytechnic Inst., Troy, NY

Design Experience: Design/Analysis Manager, 2000-2009

Delphi, Vandalia, OH

IT Manager Engrg/Design Apps, 2010-Present

BWI Group, Kettering, OH

CAD Instructor, 2011-Present

Univ. of Dayton, Dayton, OH

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Review Syllabus

1. See Isidore site

2. Syllabus subject to change as needed

3. Open to suggestions for content

improvement

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Shortfall of 2D CAD

?

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3D CAD Master Model Concept

3D Master Model

2D Drawing

3D Assembly ModelFinite Element Model

.stl File for Rapid Proto

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3D CAD Master Model Creation Steps

1. Start with a mental

image of your 3D part.

2. Break it down into

major cross-sections

3. Capture the basic shape of

the first cross-section

4. Apply geometric

constraints to the sketch tofreeze the shape

5. Add Smart Dimensions to every

characteristic needing a dimensionuntil the sketch is Fully Contstrained.

Note:

At this point, dont

worry about the EXACT

dimension. The

relationship between

the features is more

important.

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3D CAD Master Model Creation Steps

Note:

When you consistently

build your Master

Models with this

process, subsequent

changes will be much

easier to accomplish.10. Your first iteration Master

Model is complete!

6. Now add specific

dimensions if known

7. Complete sketch and

extrude to thickness

8. Repeat the process for the

other main cross-section

9. Now add or subtract

material as needed usingfillets, chamfers, holes, etc.

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Autodesk Inventor Filetypes

3D CAD parts: .ipt (Inventor Part)

2D Drawings: .idw (Inventor Drawing)

3D Assemblies: .iam (Inventor Assemblies

For reference AutoCAD files: .dwg and .dxf

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Autodesk Inventor Part (.ipt)

.ipt files are for asingle, 3D CAD part

3D Master Data can

be used as basis fordrawings, and with

other parts to make

assemblies

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Inventor Application Window Elements

Autodesk Start Button

File functions Options/settings

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Inventor Application Window Elements

Quick-Access Toolbar

Quick access to often-

used tools

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Inventor Application Window Elements

Name of currently-

active file

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Inventor Application Window Elements

Help Menu Area:

Search help

Help Options, see

pull-down

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Inventor Application Window Elements

Ribbon Tabs:

Group major

functions/tasks

together

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Inventor Application Window Elements

Model Ribbon:

The functions needed

to model a 3D part in a

workflow.

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Inventor Application Window Elements

Inspect Ribbon: Tools to measure or

analyze your model

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Inventor Application Window Elements

Tools Ribbon:

Studio Rendering Measurements

Options, Settings

Search

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Inventor Application Window Elements

Manage Ribbon:

Advanced Features

May Be Covered Later

This Term

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Inventor Application Window Elements

View Ribbon: Item visibility and

appearance options

Window layout options

Turn User Interface items

on or off Good to know if

something disappears

Navigation Wheel options

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Inventor Application Window Elements

Environments Ribbon:

Stress Analysis Inventor Studio (animations

and high-end rendering

Eco Matls Advisor

Sheet Metal conversion

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Inventor Application Window Elements

Get Started Ribbon: Excellent source of tips and

tutorials!

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Inventor Application Window Elements

Model Browser: Lists items in build order

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Inventor Application Window Elements

View Cube: Use for incremental

rotations or free rotation

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Inventor Application Window Elements

Navigation Bar: Use to choose among

several different navigation

tools, such as Zoom, Orbit,

Navigation Wheel.

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Inventor Application Window Elements

Status Bar: Tells status of modeling

step, and/or providesinstructions for next step