Transcript Introduction - Contour Crafting

USC
Automated Construction by
Contour Crafting
Behrokh Khoshnevis
University of Southern California
Viterbi School of Engineering
.
USC
Fabrication Processes
 Formative (pressing, forging, bending,..)
 Subtractive (milling, turning, chiseling, sawing, stamping..)
 Additive
 Casting (requiring mold)
 Traditional Layered Fabrication (only in manual construction)
 Modern Layered Fabrication (SFF or RP) Technologies
Viterbi School of Engineering
.
USC
Commercialized RP Technologies
Viterbi School of Engineering
.
USC
SIS – Selective Inhibition Sintering
Viterbi School of Engineering
.
USC
Viterbi School of Engineering
.
USC
MPM – Moldless Powder Metallurgy
Viterbi School of Engineering
.
USC
Viterbi School of Engineering
.
USC
Limitations of current SFF methods
•
•
•
•
Slow speed
Not scalable
Limited choice of materials
Impossible to embed other objects
Viterbi School of Engineering
.
USC
What is Contour Crafting?
Material feed barrel
Side trowel control
mechanism
CC is a layered fabrication method
which combines ancient surface
forming concepts with modern
robotics technology
Nozzle
Top trowel
Side trowel
Viterbi School of Engineering
.
USC
A CC machine for thermoplastics
Viterbi School of Engineering
.
USC
Nozzle Assemblies
Viterbi School of Engineering
.
USC
Plastic Parts
Viterbi School of Engineering
.
USC
CC Machine for Ceramics
Viterbi School of Engineering
.
USC
Viterbi School of Engineering
.
USC
Process & Machine Design Research
Comparison of the flow pattern with the simulation result and the actual process on the near optimal conditions: side views with a square
orifice (top pictures), and side views with an elliptical orifice (bottom pictures)
Viterbi School of Engineering
.
USC
Movable Side Trowel
Cylinder
Connector
Bevel gear
Nozzle
Side trowel
mechanism of
movable side
trowel
Viterbi School of Engineering
.
USC
Building Various Surface Slopes
Viterbi School of Engineering
.
USC
2.5D and 3D Objects
Viterbi School of Engineering
.