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Our team successfully machined chess boards and casted bronze chess pieces, focusing on safety, efficiency, and quality. Learn about our process improvements and outcomes in this update.
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3.042 Team Chess Project Update 3/13/07 - IT WORKED
Board Machined • Machined in two phases, over two days • Fine tip used to tighten corners • Design altered to include boarder
Safety Gear • Photographic method improved to emphasize our adherence to institute safety standards • Should help prevent unfortunate accidents and law suits • Cool, heal-protective outfits fit all sizes
Melting Ingots • Ingots cut into smaller, more manageable pieces • Melted using induction furnace • Melted in separate crucible for easier pouring
Bronze Composition 57.49 % copper 38.82 % zinc Trace amounts of; Tin Lead Iron Nickel Aluminum Manganese Silicon
Phase Diagram • Resting between the alpha and beta phase of the metal, at roughly 40% Zn composition • Melting point for this alloy should sit just above 900 C
Casting the Pieces • Investment mold heat-treated overnight in furnace • Investment mold packed with sand to fill cracks and holes • Hot metal poured and allowed to cool until no longer glowing
Removal • Placed the cooled mold into water to aid in cooling and cracking of investment • Struck investment with a small and large hammer • Shook pawn tree to loosen debris
Our First Pawn • Piece came out relatively smooth for a raw casting • Detached from tree and set to polish overnight • Good job team!
New Pawn Trees • Meant to minimize usage of investment • Should help improve mold quality • Improved safety