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A Design Study in Metal Matrix Composite Castings - AAAV Transmission Case                                           

Mold Design

The transmission case is gravity cast in a no-bake sand mold with multiple, complex cores.    There are two critical features in the transmission case --
  • The spline section at the bottom of the internal barrel.
  • The flat base plate of the transmission case which requires numerous bolt holes for attaching the fluid valves.

Both of these features are critical mating surfaces; they required extensive machining and need to be free of voids and defects.
    
->  The spline is the more critical feature.

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A key casting design issue is how to orient the component so that the most critical feature is in the bottom of the mold cavity.


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Last Modified:August, 2001 by STG

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