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Unformatted text preview: standards. Different geometric tolerancing schemes define the zones in different ways, but the significant effect is that the control is directly on the geometry. It reflects more accurately the “real-world” conditions, particularly mating-part relationships. The drawback of geometric analysis is that it tends to be complex and difficult to analyze. As seen above, the tolerancing process depends totally on the used models. The representation of deviations and tolerances, on parts or assembly, is the key problem of tolerancing. 2.1. A coherent tolerancing process To be coherent, the tolerancing process has to use the same language based on a unified mathematical model to express tolerancing for each one, involved during the process. The mathematical model has to express the “real-world” of the product with the minimum of uncertainty. An example of a coherent tolerancing process could be based on Prof. Wirtz model, called vectorial tolerancing model. But this model is not complete and for different cases very far from the reality. It implies uncertainties. An other way could be geometric tolerancing but today the standardized possibilities are not apply in manufacturing a...
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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.
- Spring '10
- The Land