Patent ID: 6963824
Filing Date: 2005-11-08
Classification: G06F

Abstract:
1. A method of evaluating tolerances of computer assisted designs for the manufacture of objects comprising, for each object: representing each tolerance zone for each geometric feature of said object by a model with an algebraic form and a geometric form, wherein the geometric form is represented as a tolerance map stored in a computer, each tolerance map comprising a hypothetical space of points that describes the acceptable positions of a surface of the object, wherein the tolerance map is a mapping of physical space into the hypothetical space of points such that the shape and size of the hypothetical space of points are functions of the tolerance zone; computing in said computer interdependencies between said stored maps and interdependencies between submaps of said stored maps to determine how different tolerance zones for said geometric feature affect each other and to determine how different tolerance zones for different geometric features of said object affect each other, wherein a tolerance zone includes subzones and submaps correspond to subzones of tolerance zones; determining how different tolerance zones for geometric features on different objects affect each other; and selecting tolerance conditions for said object to optimize allocation of tolerances to each of said geometric features of said object or objects.