Method and apparatus for determining the location of...

Details Method and apparatus for determining the location of... Method and apparatus for determining the location of...

2007-11-20

2007-11-20

Johnson, Jonathan (Department: 1725)

Metal founding

Process

Shaping a forming surface

C164S361000, C164S369000, C164S045000, C164S137000

Reexamination Certificate

active

10709451

ABSTRACT:
A secondary datum scheme is used for identifying the location of the core-produced internal geometry of hollow investment cast metal parts that are made using a free-floating core design for implementing complex internal structural features. A set of datum pads are cast on a removable portion of the core print out to provide the secondary reference system. This secondary reference system precisely establishes the location of the core-produced internal geometry of the part exclusive of any fixed external primary datum structure/system so that, for example, precision machining and gauging may be performed upon such internal features during subsequent fabrication steps.

REFERENCES:
patent: 4913217 (1990-04-01), Koch et al.
patent: 5662160 (1997-09-01), Correia et al.
patent: 6347660 (2002-02-01), Sikkenga et al.
patent: 6505678 (2003-01-01), Mertins
patent: 6582197 (2003-06-01), Coulson

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