Computer-aided Design and Drafting
Week 1 Summary: This week introduces students to Drafting and Design
Week: 1 Day: 1
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)
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Week: 1 Day: 2
Drafting Principles Presented
- Line Conventions
- Drawing Formats
- Title Blocks
- Notes/annotation/lettering styles
Student Practice - Homework
- Line Conventions
- Lettering
Week: 1 Day: 3
Drafting Principles Presented
- Measuring Scales
- Measuring Practice Sheets
Week: 1 Day: 4
View Conventions
- Single View Drawings
- Multi-view Drawings
PowerPoint Presentations
- Orthographic Projection
- Student View Practice
Homework
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Week: 1 Day: 5
PowerPoint Presentations and Worksheets on
-Auxiliary Views
-Section Views
Administer Drafting principles Quiz
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Week 2 Summary: Week two provides practice creating freehand design sketches
Week: 2 Day: 1
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)
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Week: 2 Day: 2
Guided Practice
- Present orthographic projections and lettering principles using PowerPoints.
- Students create sample sketch: multiview drawing with lettering
- User finger guide for lettering
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Week: 2 Day: 3
Create sample sketches. Multi-view and auxiliary view sketch with lettering
Guided Practice
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Week: 2 Day: 4
View Video on Dimensioning Rules and Guidelines
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Week: 2 Day: 5
Turn in homework; administer quiz
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Week 3 Summary: Week three provides an introduction to AutoCAD basic commands along with basic drawing creation
Week: 3 Day: 1
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
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Week: 3 Day: 2
Continue demonstration and practice with elementary AutoCAD drawing commands. Students practice using dwg2form.dwg
Additional AutoCAD command demonstrations
- Layer commands
- Additional editing commands
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Week: 3 Day: 3
Continue demonstration and practice with elementary AutoCAD drawing commands. Students practice using dwg3form.dwg, Latch Plate
Additional AutoCAD command demonstrations
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Week: 3 Day: 4
Guided Practice. Students continue practice on Latch plate drawing (dwg3form.dwg)
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Week: 3 Day: 5
Continue demonstration and practice with elementary AutoCAD drawing commands. Students create drawing of a Geneva cam.
Drawing commands
Week 4 Summary: Week four provides information on dimensioning, tolerancing and drafting standards
Week: 4 Day: 1
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
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Week: 4 Day: 2
Introduce students to industry and government drawing standards
Standards
- Layer naming - colors - linetypes
- Text/fonts
- Filing - naming conventions
Week: 4 Day: 3
Week: 4 Day: 4
Week: 4 Day: 5
Week 5 Summary: Week five applies AutoCAD drawing principles to create working design drawings (Design Project)
Week: 5 Day: 1
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)
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Week: 5 Day: 2
Create 3-D latchplate view using C-Form.dwg drawing format
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Week: 5 Day: 3
Create 3-D latchplate view using C-Form.dwg drawing format
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Week: 5 Day: 4
Create 3-D latchplate. Scale MS data in PS environment.
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Week: 5 Day: 5
Create 3-D latchplate. Plot 3-D Latch Plate drawing
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Week 6 Summary: Week six - Working/Assembly Drawings and 3-D drawing manipulation
Week: 6 Day: 1
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)
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Week: 6 Day: 2
Instruction and guided practice. Understanding Assembly/Working drawings and parts lists.
Week: 6 Day: 3
3-D drawing. Students create model airplane gasket.
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Week: 6 Day: 4
Students create 3-D caster wheel bushing.
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Week: 6 Day: 5
3-D demonstration, rendering, and displays
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