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Unformatted text preview: ..................................................................................................................353 A Unified Approach to Design of Assemblies Integrating Nominal and Variation Design D. E. Whitney Massachusetts Institute of Technology, Cambridge MA 02139 [email protected] Keynote Presentation to the 9th CIRP Seminar on Computer-Aided Tolerancing In this presentation I sketch out a model of mechanical assemblies that uses the same underlying mathematics, namely Screw Theory, to model both the nominal and varied condition of an assembly. This model is fleshed out in detail in [1] with preliminary presentations in [2-7]. The model represents assemblies as kinematic mechanisms which may or may not be capable of motion by intent. Reference [1] contains references to many papers by other researchers upon whom I relied and who have built up this field. Assemblies are designed with the intent of achieving one or more Key Characteristics, that is, specifications on relative position and orientation between features on possibly non-adjacent parts, and speci...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.

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