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Unformatted text preview: Yesterday: Life t Figure 1; Change of the failure mode The aim of this paper is to study the effect of geometrical errors on the operation performance of a mechanism. In a first part, the relation between the geometrical uncertainties and the new failure mode will be discussed. The second section of the document will then present the model used to describe the variations of the geometry of each part. The industrial example of a fuel injection pump will finally be used to illustrate our subject. 2. LINK BETWEEN GEOMETRICAL VARIATIONS AND MECHANICAL OPERATING PERFORMANCES Power transmission in mechanical systems is made possible, thanks to two fundamental phenomena: macro geometrical compensations, micro geometrical accommodations. 2.1. Macro ge ometrical compensation The improvement in manufacturing quality may lead to reduc tion of the clearances between the parts. This decrease modifies the macro geometrical compensation (MGC) of the geometrical defects in the mechanism. The MGC is characterized by the...
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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