Week 2 Lecture 3D Part Design ME 24-688 Introduction to CAD/CAE - - PowerPoint PPT Presentation

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Week 2 Lecture 3D Part Design ME 24-688 Introduction to CAD/CAE - - PowerPoint PPT Presentation

Jan 13, 2024 42 likes •552 views

Week 2 Lecture 3D Part Design ME 24-688 Introduction to CAD/CAE Tools Lecture Topics Product Lifecycle Process Review Detailed Product Engineering Challenges and Purpose Evolution of CAD General 3D Design Concepts Case

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ME 24-688 Introduction to CAD/CAE Tools

Week 2 – Lecture 3D Part Design

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ME 24-688 Introduction to CAD/CAE Tools

Lecture Topics

  • Product Lifecycle Process Review
  • Detailed Product Engineering
  • Challenges and Purpose
  • Evolution of CAD
  • General 3D Design Concepts
  • Case Study Examples
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ME 24-688 Introduction to CAD/CAE Tools

Product Lifecycle

Requirements Management Portfolio Management Conceptual Design Product Engineering Manufacturing Engineering Simulation & Validation Build & Produce Test & Quality Sales & Distribution Maintenance & Repair Disposal & Recycling

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Product Lifecycle – Week 2

Portfolio Management Conceptual Design Product Engineering Manufacturing Engineering Simulation & Validation Build & Produce Test & Quality Sales & Distribution Maintenance & Repair Disposal & Recycling Requirements Management

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Product Engineering

  • Product engineering following conceptual

design is responsible for the continued development of the concept to a full technically complete design.

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Product Engineering

  • Inputs

– Conceptual Design Data – Project / Design Requirements – Reference Data

  • Outputs

– Technical Complete Product Design – Design Data for Manufacturing – Bill of Materials (BOM)

Product Engineering

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Product Engineering Challenges

  • Project Schedules
  • Design Cost
  • Product Quality
  • Addressing Requirements
  • Changes (All Types)
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Product Cost vs. Time

Life Time Product Cost Phase of Product Life

Concept Design Testing / Validation Production Process Planning 100% 0% 80% 60% 40% 20%

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Rule of Ten

  • The “Rule of Ten” specifies that it costs 10

times more for an engineering change at the next phase.

Time of Change Cost of Change During Design X During Design Testing 10 X During Process Planning 100 X During Test Production 1,000 X During Final Production 10,000 X

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ME 24-688 Introduction to CAD/CAE Tools

Software Tools Used

  • CAx

– Computer Aided Design (CAD) – Computer Aided Manufacturing (CAM) – Computer Aided Engineering (CAE)

  • PLM

– Product Lifecycle Management (PLM) – Product Data Management (PDM) – Management of companies intellectual virtual product assets

  • ERP

– Enterprise Resource Planning (ERP) – Management of companies deliverable physical product assets

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Evolution of Design Tools (CAD)

1980 1990 2000 2010 2020 1970

Manual Paper Drafting 2D CAD Applications 3D General Application Purpose 3D Systems Full Digital Prototypes

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What is 3D Modeling

  • Creation of a digital model of the real

physical object.

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3D Design Use

3D CAD Model CNC Manufacturing Rapid Prototyping Visualization Simulation / Analysis Design Detail and Form Automation

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3D Downstream Benefits (1 of 3)

  • CNC Manufacturing

– Programming of Computer Numerical Control (CNC) manufacturing equipment from 3D model geometry to automate manufacturing of production components.

  • Rapid Prototyping

– 3D printing of physical prototype models from 3D model geometry.

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3D Downstream Benefits (2 of 3)

  • Automation

– Fully automated process with low

  • verhead for creating product

configurations and design personalization's for clients.

  • Design Detail and Form

– Ability to design and communicate complex objects that are almost impossible to do without 3D design.

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3D Downstream Benefits (3 of 3)

  • Visualization

– Leveraging of 3D design models for creating realistic visualizations for communicating designs.

  • Simulation / Analysis

– Ability to analysis 3D design models early and often in the design cycle to

  • ptimize the design and identify defects

without physical components.

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Autodesk Inventor

  • Autodesk Inventor 3D mechanical design

software includes CAD productivity and design communication tools. The Inventor model is a detail 3D digital prototype that can validate the form, fit, and function of a design.

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File Types and Relationships

  • Part Files (IPT)
  • Assembly Files (IAM)
  • Drawing Files (DWG / IDW)
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Parametric Modeling

  • A parametric model is a 3D model that is

controlled and driven by geometric relationships and dimensional values.

  • With a parametric model, you can change a

value of a feature and the part model is adjusted according to that value and existing geometric constraints.

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Progression of a Parametric Model

  • 1. Initial Sketch
  • 2. Base Sketch Feature
  • 3. Secondary Sketches
  • 4. Secondary Feature from Sketch
  • 5. Add Placed Features
  • 6. Parametric Change with Update
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Solid Model vs. Surface Model

Solid Model Surface Model

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Guidelines

  • Start your 3D model like you would if you

where making it from real materials in most cases.

  • Create the model to the perfect world

conditions with no tolerances.

  • Capture all elements of the model to create

a digital version of the real component.

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ME 24-688 Introduction to CAD/CAE Tools

Gefit Livernois Engineering - Case Study

“By showing Inventor presentations to

  • ur international customers we don’t

have to explain what we’re doing—they can see it on the screen. Inventor presentations remove the language

  • barrier. Over 50% of our customers

reside outside the US.” Larry Schester Mechanical Design Supervisor Gefit Livernois Engineering, LLC United States

Challenge

Improve Livernois competitive strength in designing machines for the heat exchange equipment market while improving design accuracy and decreasing time to delivery.

Results

  • 10% fewer errors overall
  • Maintained productivity level

despite 20% staff reduction

  • 30% reduction in re-work

time; 10% overall cost savings

  • n new semi-automatic core

builder

  • Won contract in part by

presenting customer designs in 3D with Inventor

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Brokk AB - Case Study

“The number of design errors has decreased substantially since we started to design with Inventor.” Anders Norberg Design Manager Brokk AB Sweden

Challenge

Build more innovation into products, improve product quality, and get to market faster than competition.

Results

  • Reduced time to market

by 30%.

  • Reduced physical prototypes

from 4 to 2.

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Computer-Cluster Projects (CP2)

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Cluster Project 1

  • Guided instructions for modeling clevis

mount part.

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Cluster Project 2

  • Guided instructions for modeling flange

manifold part.

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Cluster Project 3

  • Guided instructions for modeling air cover

part.

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Problem Set Assignment

  • Model and provide volume of following part.
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Demo Topics

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File Types

Assembly files: *.iam files reference part files and are referenced by drawing files. Part files: *.ipt files are referenced by assembly files and drawing files. Drawing files: *.dwg files reference assembly files and part files. Inventor Drawing files: *.idw files are interchangeable with *.dwg files in Inventor and reference assembly and part files.

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User Interface

Application Menu Quick Access Toolbar Ribbon Ribbon Tabs ViewCube Navigation Bar Browser 3D Indicator Graphics Window

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Browser

Model Browser Assembly Browser

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Marking Menu and Overflow Menu

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Navigation Bar

ViewCube SteeringWheel Pan View Face Zoom All Free Orbit

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Function Key Shortcut Keys

  • KEY

NAME FUNCTION

  • F2

Pan Pans the graphics window.

  • F3

Zoom Zooms in or out in the graphics window.

  • F4

Rotate Rotates objects in the graphics window.

  • F5

Previous View Returns to the previous view.

  • F6

Isometric View Display the isometric view of the model

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Mouse Viewing Tools

  • MOUSE FUNCTION

NAME

  • Click and Drag Mouse Wheel Button

Pan

  • Roll Mouse Wheel

Zoom

  • Shift + Click and Drag Mouse Wheel Button

Free Orbit

  • Double-Click Mouse Wheel Button

Zoom All

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Basic Sketching Techniques

  • Constraint Types

– Perpendicular – Parallel – Tangent – Coincident

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Basic Sketching Techniques

  • Constraint Types Continued…

– Concentric – Collinear – Equal – Symmetric

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Basic Sketching Techniques

  • Constraint Types Continued…

– Vertical – Horizontal

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Creating and Using Construction Geometry

  • Ribbon: Sketch tab | Format panel

– Construction Geometry – Centerline Geometry

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  • Extrude

Ribbon: Model tab | Create panel | Extrude Keyboard Shortcut: E

  • Extrude Mini-Toolbar Options

Creating Extruded Features

– OK – Cancel – Profile – Direction

– Operation – Extents – Output

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Creating Revolved Features

  • Revolve

Ribbon: Model tab | Create panel | Revolve Keyboard Shortcut: R

  • Extrude Mini-Toolbar Options

– Extents – Output – OK – Cancel – Profile – Axis – Solid – Direction

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– Chamfer Style – OK – Apply – Cancel – Selection

Creating Chamfers

  • Chamfer

Ribbon: Model tab | Create panel | Chamfer Keyboard Shortcut: CTRL+SHIFT+K

  • Mini-Toolbar: Click edge in active part, Select Chamfer
  • Chamfer Mini-Toolbar Options
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Creating Holes

  • Hole

Ribbon: Model tab | Create panel | Hole Keyboard Shortcut: E

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Creating Rectangular Patterns

  • Rectangular Pattern

Ribbon: Model tab | Pattern panel | Rectangular Keyboard Shortcut: CTRL+SHIFT+R

  • Rectangular Pattern Dialog Box

Pattern Feature

Individual Feature Features Solid

Pattern Solid

Entire Solid Solid Include Work/Surface Feature Join Create new bodies

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Creating Circular Patterns

  • Rectangular Pattern

Ribbon: Model tab | Pattern panel | Circular Keyboard Shortcut: CTRL+SHIFT+O

  • Circular Pattern Dialog Box

Pattern Feature

Individual Feature Features Rotation Axis Solid

Pattern Solid

Entire Solid Solid Include Work/Surface Feature Rotation Axis Join Create new bodies

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Mirroring Features

  • Rectangular Pattern

Ribbon: Model tab | Pattern panel | Mirror Keyboard Shortcut: CTRL+SHIFT+M

  • Mirror Dialog Box

Mirror Feature

Individual Feature Features Mirror Plane Solid

Pattern Solid

Entire Solid Solid Include Work/Surface Feature Mirror Plane Join Create new bodies Remove Original

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Creating Shell Features

  • Shell

Ribbon: Model tab | Modify panel | Shell

  • Shell Dialog Box

Shell Dialog Box

Inside Outside Both: Half Remove Faces Automatic Face Chain Solids

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Creating Sweep Features

  • Sweep

Ribbon: Model tab | Create panel | Sweep

  • Sweep Dialog Box

Sweep Dialog Box

Profile Path Solid Remove Faces Automatic Face Chain Solids