Tolerance Analysis for Sheet Metal Assemblies

[+] Author and Article Information
S. C. Liu, S. J. Hu

Department of Mechanical Engineering and Applied Mechanics, The University of Michigan, Ann Arbor, MI 48109

T. C. Woo

Department of Industrial Engineering, The University of Washington, Seattle, WA 98194

J. Mech. Des 118(1), 62-67 (Mar 01, 1996) (6 pages) doi:10.1115/1.2826857 History: Received April 01, 1995; Revised August 01, 1995; Online December 11, 2007


Traditional tolerance analyses such as the worst case methods and the statistical methods are applicable to rigid body assemblies. However, for flexible sheet metal assemblies, the traditional methods are not adequate: the components can deform, changing the dimensions during assembly. This paper evaluates the effects of deformation on component tolerances using linear mechanics. Two basic configurations, assembly in series and assembly in parallel, are investigated using analytical methods. Assembly sequences and multiple joints beyond the basic configurations are further examined using numerical methods (with finite element analysis). These findings constitute a new methodology for the tolerancing of deformable parts.

Copyright © 1996 by The American Society of Mechanical Engineers
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