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Automated Construction by Contour Crafting Behrokh Khoshnevis University of Southern California. Fabrication Processes. Formative (pressing, forging, bending,..) Subtractive (milling, turning, chiseling, sawing, stamping..) Additive Casting (requiring mold)
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Automated ConstructionbyContour CraftingBehrokh KhoshnevisUniversity of Southern California Viterbi School of Engineering .
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 .
Commercialized RP Technologies Viterbi School of Engineering .
SIS – Selective Inhibition Sintering Viterbi School of Engineering .
MPM – Moldless Powder Metallurgy Viterbi School of Engineering .
Limitations of current SFF methods • Slow speed • Not scalable • Limited choice of materials • Impossible to embed other objects Viterbi School of Engineering .
Material feed barrel Side trowel control mechanism Nozzle Top trowel Side trowel What is Contour Crafting? CCis a layered fabrication method which combines ancient surface forming concepts with modern robotics technology Viterbi School of Engineering .
A CC machine for thermoplastics Viterbi School of Engineering .
Nozzle Assemblies Viterbi School of Engineering .
Plastic Parts Viterbi School of Engineering .
CC Machine for Ceramics Viterbi School of Engineering .
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) Process & Machine Design Research Viterbi School of Engineering .
Cylinder Connector Bevel gear Nozzle Side trowel mechanism of movable side trowel Movable Side Trowel Viterbi School of Engineering .
Building Various Surface Slopes Viterbi School of Engineering .
2.5D and 3D Objects Viterbi School of Engineering .