System for conversion between the boundary representation model and a constructive solid geometry model of an object

Patent · Tue Apr 05 00:00:00 EDT 1988

OSTI ID:866562

Christensen, Noel C ^[1]; Emery, James D ^[1]; Smith, Maurice L ^[1]

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1. Kansas City, MO

A system converts from the boundary representation of an object to the constructive solid geometry representation thereof. The system converts the boundary representation of the object into elemental atomic geometrical units or I-bodies which are in the shape of stock primitives or regularized intersections of stock primitives. These elemental atomic geometrical units are then represented in symbolic form. The symbolic representations of the elemental atomic geometrical units are then assembled heuristically to form a constructive solid geometry representation of the object usable for manufacturing thereof. Artificial intelligence is used to determine the best constructive solid geometry representation from the boundary representation of the object. Heuristic criteria are adapted to the manufacturing environment for which the device is to be utilized. The surface finish, tolerance, and other information associated with each surface of the boundary representation of the object are mapped onto the constructive solid geometry representation of the object to produce an enhanced solid geometry representation, particularly useful for computer-aided manufacture of the object.

• Research Organization: Kansas City Plant (KCP), Kansas City, MO (United States)
• DOE Contract Number: AC04-76DP00613
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4736306
• Application Number: 06/728,367
• OSTI ID: 866562
• Country of Publication: United States
• Language: English

Related Subjects

/345/700/706/
adapted
artificial
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associated
atomic
boundary
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computer-aided
constructive
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heuristic
heuristically
i-bodies
information
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intersections
manufacture
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mapped
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particularly
particularly useful
primitives
produce
regularized
representation
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shape
solid
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stock
surface
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symbolic
tolerance
units
usable
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utilized