Step 1: Create sketch with SketchBook
I used SketchBook to come up with the idea.
I saved a screen shoot to use for the rest of my design.
Step 2: Autodesk ForceEffect to optimize the design
Set background from saved image
Set units to inch
Trace over background image (set seat height to 18”)
bond all joints
Add 200 lb distributed load
I want to reduce the twisting on point “E” since it is the most likely connection that will fail.
Original design has 516 lb-in of twisting at point “E”
Slight change in geometry creates 360 lb-in of twisting at point “E”
Final design has 284 lb-in of twisting at point “E” reducing the stress on point “E” by almost half.
I saved my diagram to Autodesk 360 so that could use it to start my Inventor 3D model..
Step 3: Create 3D design with Autodesk Inventor
After creating my 3D model I crerated some basic 2 drawings to help with the build.
Step 4: The build..
Assemble the glue up the seat
Measure and cut all members except for back member (will measure this on in place later)
Since this is a symmetrical chair I clamped and cut 2 members at one time (this ensure very consistent and accurate cuts)
Join all members except for back, clamp back in position and mark cut.
Stain another day :)