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A New Perspective on Tolerance Analysis Based on Tolerance Zones

出版	[Carnegie Mellon University], Engineering Design Research Center, 1991
URL	http://books.google.com.hk/books?id=IASyNwAACAAJ&hl=&source=gbs_api

註釋However, it is seen that tolerance zones generated by Worst Case or Root Sum Square (RSS) models do not encompass all possible variations in an assembly made of parts that are within tolerance specification, because the effect of non-worst case stacking situations is not considered. The new perspective on tolerance analysis, discussed in this paper, addresses the effect of non-worst case stacking situations by studying angular accumulation in addition to linear accumulation of tolerances. In a general plus/minus tolerance part there is a high probability that the part conforms to the specified tolerances with a surface that is not at the true angular position with respect to other features.