3d engineering drawings

3D ENGINEERING

DRAWINGS

T O Y I NG W

I TH T

E C H N O L O G Y

WHY IS DRAWING IMPORTANT?• Communication• Ideas• Parts/Assemblies• Dimensions and Units

WHY I LIKE DESIGN• Engineering without technical theories and equations• Creative• Enjoyable

COMPUTER AIDED DESIGN - SOLIDWORKS

STARTING OUT• You can’t just jump into creating on the computer….• You have to start by hand!!

ENGINEERING PAPER• English vs. Metric Units• Cartesian vs. Engineering vs. Isometric

VISUALIZING IN 3D• Take 3 to 5 Duplo Legos and put them together however you

like• Visualize clear box around your structure• Draw each side of the “box” on the box template on your

table• Fold and tape into box formation• Does it resemble actual structure?

DRAWINGS AND COMMUNICATION• Find someone in the room to trade boxes with• Can you build each other’s structure?

• What was easy about building the new structure?• What was difficult about building the new structure?• What could have improved your build?

ENGINEERS DON’T DRAW ON BOXES• Let’s find a way to flatten that box

• Shade in the following sides on your box with the crayons at your table:• Top = red• Pick two adjacent sides that also touch the top = Make one blue

and one yellow

ENGINEERING TECHNICAL DRAWINGS

ISOMETRIC VIEWS• 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 DEMONSTRATION1 – Draw Side Shape2 – Project Corners Backward3 - Draw Back Shapehttp://www.youtube.com/watch?v=ZBuhGaGPYfQ

PRACTICE ISOMETRIC DRAWINGS• Cube – 5 x 5 x 5• Cube – 8 x 8 x 8• Rectangular Prism – 4 x 3 x 7• Rectangular Prism – 3 x 9 x 3• Triangular Prism - Right triangle with legs = 7, depth = 3• Pyramid – Base = 4 squares• Cut-Off Pyramid – Base = 16 squares, top row = 4 squares

• Challenge: Cube 2 x 2 x 2 with pyramid on top

FINISH THAT TECHNICAL DRAWINGDraw your Duplo Masterpiece on the isometric view of your

technical drawing

LET’S TRADE AGAIN• Find someone new and trade again• Build their structure

• Was one drawing type easier than the other?

TECHNICAL DRAWING SYMBOLS• Understanding Symbols:

http://www.wisc-online.com/Objects/ViewObject.aspx?ID=ENG16204

TECHNICAL DRAWING LINES• Understanding Lines:

http://www.wisc-online.com/Objects/ViewObject.aspx?ID=ENG16004

TECHNICAL DRAWING DIMENSIONS• Understanding dimensions:

http://www.wisc-online.com/Objects/ViewObject.aspx?ID=ENG16104

A LITTLE EXTRA VISUALIZATIONhttp://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• Draw an item in your

kitchen.• Under the assignments

tab• Will turn in by hand• Due: September 17th