Automated Construction by Contour Crafting Behrokh Khoshnevis University of Southern California
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Transcript of Automated Construction by Contour Crafting Behrokh Khoshnevis University of Southern California
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Automated ConstructionAutomated Construction byby Contour CraftingContour Crafting
Behrokh KhoshnevisUniversity of Southern California
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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
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Commercialized RP Technologies
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SIS – Selective Inhibition Sintering
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MPM – Moldless Powder Metallurgy
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Limitations of current SFF methods
• Slow speed• Not scalable• Limited choice of materials• Impossible to embed other objects
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What is Contour Crafting?
Material feed barrel
Nozzle
Side trowel
Side trowel control mechanism
Top trowel
CC is a layered fabrication method which combines ancient surface forming concepts with modern robotics technology
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A CC machine for thermoplastics
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Nozzle Assemblies
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Plastic Parts
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CC Machine for Ceramics
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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)
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Movable Side Trowel
Cylinder
Connector
Bevel gear
Nozzle
Side trowel
mechanism of movable side trowel
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Building Various Surface Slopes
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2.5D and 3D Objects