Breaking down tolerance stack-up. (Brigham Young University's tolerance model)
Tolerance variation in assemblies results from 3 sources: size, form and kinematics. During assembly, tolerances in each part can accumulate to create large residual stack-ups, inducing poor product performance and high cost. Flexible assemblies containing nonrigid parts, produce an additional compl...
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| Veröffentlicht in: | Machine design 1997-04, Vol.69 (8), p.71-74 |
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| creator | Merkley, Karl Chase, Ken |
| description | Tolerance variation in assemblies results from 3 sources: size, form and kinematics. During assembly, tolerances in each part can accumulate to create large residual stack-ups, inducing poor product performance and high cost. Flexible assemblies containing nonrigid parts, produce an additional complexity to tolerance prediction. Several tolerance models account for the stack-up problem in assemblies with rigid components and point to a variety of solutions. One method, however, has been applied early in the design process and calculates stresses in rigid assemblies consisting of flexible parts. The tolerance model developed at Brigham Young University, based on a Direct Linearization Method (DLM), uses a linear approximation of nonlinear assembly functions. The DLM modeler is available in TI/TOL 3D+ from Texas Instruments. This package is integrated with the parametric capabilities of Pro/Engineer from Parametric Technologies Corp. The technique is described. |
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| issn | 0024-9114 1944-9577 |
| language | eng |
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| source | EBSCOhost Business Source Complete |
| subjects | Computer aided analysis Finite element analysis Finite element method Fits and tolerances Kinematics Mathematical models Measurement Statistical methods Stiffness matrix Stress Stress analysis Tolerance (Engineering) Yield stress |
| title | Breaking down tolerance stack-up. (Brigham Young University's tolerance model) |
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