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Processor and method for developing a set of admissible fixture designs for a workpiece

United States Patent

5,856,924
January 5, 1999
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
Methods and apparatus are provided for developing a complete set of all admissible Type I and Type II fixture designs for a workpiece. The fixture processor generates the set of all admissible designs based on geometric access constraints and expected applied forces on the workpiece. For instance, the fixture processor may generate a set of admissible fixture designs for first, second and third locators placed in an array of holes on a fixture plate and a translating clamp attached to the fixture plate for contacting the workpiece. In another instance, a fixture vise is used in which first, second, third and fourth locators are used and first and second fixture jaws are tightened to secure the workpiece. The fixture process also ranks the set of admissible fixture designs according to a predetermined quality metric so that the optimal fixture design for the desired purpose may be identified from the set of all admissible fixture designs.
Brost; Randolph C. (Albuquerque, NM), Goldberg; Kenneth Y. (Los Angeles, CA), Canny; John (UC Berkeley, CA), Wallack; Aaron S. (Albany, CA)
08/ 430,884
April 28, 1995
GOVERNMENT RIGHTS The government has rights in this invention pursuant to Contract No. DE-ACO4-76-DP00789 awarded by the U.S. Department of Energy.