Computer-aided Design and Drafting

Week 1
This week introduces students to Drafting and Design
Week 2
Week two provides practice creating freehand design sketches
Week 3
Week three provides an introduction to AutoCAD basic commands along with basic drawing creation
Week 4
Week four provides information on dimensioning, tolerancing and drafting standards
Week 5
Week five applies AutoCAD drawing principles to create working design drawings (Design Project)
Week 6
Week six - Working/Assembly Drawings and 3-D drawing manipulation

Introduction to Drafting and Design

View video (CADAM-The Productive Edge, 19 mins) and deliver PowerPoint presentation on sketching

Topics covered in the video and in class
  • CAD/Computer Hardware
  • Application Software
  • Sample Drawings
  • Equipment (HB pencil, white eraser, diskette)
Links for Lesson:

Sketching

This week lessons involve guided practice and homework in freehand sketching. Teachers will need to download sample AutoCad drawings from this site

Sample Sketches
  • Student practice
  • -HB pencil
  • -White eraser
  • -Grid paper
  • Homework
  • -Gasket drawing (single view drawing)
Links for Lesson:

Application Program

Demonstrate to students the MS Windows-AutoAD desktop environment and elementary commands in the AutoCAD application. Students will practice on the dwg1form.dwg file included in this curriculum

Topics to be covered
  • Windows operating system
  • AutoCAD 2002 desktop
  • Display commands
  • Basic drawing commands
  • Editing commands
  • File saving commands
Links for Lesson:

Dimensioning in AutoCAD

Demonstrate and practice dimensioning in AutoCAD

Elements of AutoCAD dimensioning
  • DIM Command
  • Linear dimensions
  • Radial dimensions
  • Angular dimensions
  • Leaders and special NOTE dimensions
  • Understanding and adjusting DIM VAR settings (Dimension variables)
  • Special Tolerance type dimensions
  • GD and T text and symbols
Links for Lesson:

AutoCAD Drawing Principles

Introduce Principles and create 3-D drawings

Principles
  • AutoCAD Environments - Model vs. Paper Space
  • Mview for Viewport creation
  • Floating Model Space
  • Viewport Scaling (X/XP)
  • No-show layers per current viewport
  • Hiding PSPace vports on frozen layers
  • Plotting in Paper space
  • Assemble 3-D drawing of Latch Plate (Use C-form.dwg format)
Links for Lesson:

Assembly Drawings

Present assembly drawing elements and guide students in creating assembly drawings in AutoCAD

Assembly Drawing Elements
  • Understanding assembly drawings
  • Assembly (working drawings) vs. Detail drawings
  • Parts list (Bill of Materials)
  • Using Item Find numbers (ID flag)
Link for Lesson:

Drafting Principles

Drafting Principles Presented - Line Conventions - Drawing Formats - Title Blocks - Notes/annotation/lettering styles

Student Practice - Homework
  • Line Conventions
  • Lettering

Freehand Sketching

Guided Practice

  • Present orthographic projections and lettering principles using PowerPoints.
  • Students create sample sketch: multiview drawing with lettering
  • User finger guide for lettering
  • Links for Lesson:

    Application Program

    Continue demonstration and practice with elementary AutoCAD drawing commands. Students practice using dwg2form.dwg

    Additional AutoCAD command demonstrations
    • Layer commands
    • Additional editing commands
    Link for Lesson:

    Drafting Standards

    Introduce students to industry and government drawing standards

    Standards
    • Layer naming - colors - linetypes
    • Text/fonts
    • Filing - naming conventions

    AutoCAD Drawing Lab

    Create 3-D latchplate view using C-Form.dwg drawing format

    Link for Lesson:

    Assembly Drawings

    Instruction and guided practice. Understanding Assembly/Working drawings and parts lists.


    Drafting Principles - Elements

    Drafting Principles Presented - Measuring Scales - Measuring Practice Sheets


    Freehand Sketching

    Create sample sketches. Multi-view and auxiliary view sketch with lettering

    Guided Practice
    Link for Lesson:

    Application Program

    Continue demonstration and practice with elementary AutoCAD drawing commands. Students practice using dwg3form.dwg, Latch Plate

    Additional AutoCAD command demonstrations
    • Mirror and Fillet
    Link for Lesson:






    AutoCAD Drawing Lab

    Create 3-D latchplate view using C-Form.dwg drawing format

    Link for Lesson:

    Assembly Drawings

    3-D drawing. Students create model airplane gasket.

    Link for Lesson:

    Drafting Principles - Elements

    View Conventions - Single View Drawings - Multi-view Drawings PowerPoint Presentations - Orthographic Projection - Student View Practice

    Homework
    • Surface ID
    Links for Lesson:

    Freehand Sketching

    View Video on Dimensioning Rules and Guidelines

    Links for Lesson:

    Application Program

    Guided Practice. Students continue practice on Latch plate drawing (dwg3form.dwg)

    Link for Lesson:






    AutoCAD Drawing Lab

    Create 3-D latchplate. Scale MS data in PS environment.

    Link for Lesson:

    3-D drawings

    Students create 3-D caster wheel bushing.

    Link for Lesson:

    Drafting Principles - Evaluation

    PowerPoint Presentations and Worksheets on -Auxiliary Views -Section Views Administer Drafting principles Quiz

    Links for Lesson:

    Freehand Sketching Evaluation

    Turn in homework; administer quiz

    Link for Lesson:

    Application Program

    Continue demonstration and practice with elementary AutoCAD drawing commands. Students create drawing of a Geneva cam.

    Drawing commands
    • Array commands






    AutoCAD Drawing Lab

    Create 3-D latchplate. Plot 3-D Latch Plate drawing

    Link for Lesson:

    3-D Drawings

    3-D demonstration, rendering, and displays

    Link for Lesson: