Computer-aided geometrical dimensioning and tolerancing for process-operation planning and quality control |
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| Authors: | J R He Dr P R Gibson |
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| Affiliation: | (1) School of Mechanical and Manufacturing Engineering, University of New South Wales, Australia;(2) Department of Mechanical Engineering, The University of Wollongong, PO Box 1144, 2500 Wollongong, Australia |
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| Abstract: | This paper describes an extension of a model which determines an optimum set of dimensions and tolerances for machining processes
at minimum manufacturing cost.
This optimisation minimizes the cost of scrap, which is a function of manufacturing tolerances, as the objective function.
Requirements of design sizes, geometrical tolerances (including both form and position) and machining allowances are expressed
mathematically as constraints for the optimisation.
A computerised trace method has been extended to determine the relationships between geometrical tolerances and associated
relevant manufacturing dimensions and tolerances.
In addition to the manufacturing cost, the model takes into account manufacturing sequence, distribution of manufacturing
dimensions, process capabilities, tolerances, design sizes, geometrical tolerances, machining allowances and optimum scrap
level.
The resulting computerized interactive system can be used not only in process planning, but also in quality control. |
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| Keywords: | Dimensioning Tolerancing Process-planning Quality-control Geometrical Optimisation |
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