### 3D Engineering Drawings

```WHY IS DRAWING IMPORTANT?
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Communication
• Ideas
• Parts/Assemblies
• Dimensions and Units
WHY I LIKE DESIGN
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Engineering without technical theories and equations
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Creative
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Enjoyable
COMPUTER AIDED DESIGN - SOLIDWORKS
STARTING OUT
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You can’t just jump into creating on the computer….
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You have to start by hand!!
ENGINEERING PAPER
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English vs. Metric Units
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Cartesian vs. Engineering vs. Isometric
VISUALIZING IN 3D
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Take 3 to 5 Duplo Legos and put them together however you like
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Visualize clear box around your structure
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Draw each side of the “box” on the box template on your table
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Fold and tape into box formation
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Does it resemble actual structure?
DRAWINGS AND COMMUNICATION
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Find someone in the room to trade boxes with
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Can you build each other’s structure?
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What was easy about building the new structure?
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What was difficult about building the new structure?
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What could have improved your build?
ENGINEERS DON’T DRAW ON BOXES
•
•
Let’s find a way to flatten that box
• Top = red
• Pick two adjacent sides that also touch the top = Make one blue and one yellow
ENGINEERING TECHNICAL DRAWINGS
ISOMETRIC VIEWS
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Drawing looking at
corner of “box”, not
straight on face
A LITTLE GEOMETRY
http://www.mr-d-n-t.co.uk/isometric.htm
A DRAWING DEMONSTRATION
1 – Draw Side Shape
2 – Project Corners Backward
3 - Draw Back Shape
PRACTICE ISOMETRIC DRAWINGS
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Cube – 5 x 5 x 5
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Cube – 8 x 8 x 8
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Rectangular Prism – 4 x 3 x 7
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Rectangular Prism – 3 x 9 x 3
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Triangular Prism - Right triangle with legs = 7, depth = 3
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Pyramid – Base = 4 squares
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Cut-Off Pyramid – Base = 16 squares, top row = 4 squares
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Challenge: Cube 2 x 2 x 2 with pyramid on top
FINISH THAT TECHNICAL DRAWING
Draw your Duplo Masterpiece on the isometric view of your technical drawing
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Find someone new and trade again
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Build their structure
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Was one drawing type easier than the other?
TECHNICAL DRAWING SYMBOLS
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Understanding Symbols: http://www.wisconline.com/Objects/ViewObject.aspx?ID=ENG16204
TECHNICAL DRAWING LINES
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Understanding Lines: http://www.wisconline.com/Objects/ViewObject.aspx?ID=ENG16004
TECHNICAL DRAWING DIMENSIONS
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Understanding dimensions: http://www.wisconline.com/Objects/ViewObject.aspx?ID=ENG16104
A LITTLE EXTRA VISUALIZATION
http://www.wisc-online.com/Objects/ViewObject.aspx?ID=ENG19404
CHALLENGE BUILD
WHY THIS IS IMPORTANT TO YOU
•
•
Improve accuracy
Future Projects
• Rube Goldberg
• Boat Activity
• Lego Egg Drop
ASSIGNMENT
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Draw an item in your kitchen.
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Under the assignments tab
•
Will turn in by hand
•
Due: September 17th
```