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Unformatted text preview: oints of the axis must lie. This zone can float/wobble in the cylindrical tolerance-zone for position (diameter t = 0.1mm in Fig. 1(a)) of the axis. Consequently, the Standard [ASME,1994] requires t' to be smaller than the position tolerance on the same axis, indeed smaller than any orientational tolerance also. The T-Map for the position of the axis is still the 4-D point-space defined by the location of basis-points in Fig 2, but now there are two geometrically similar internal subsets whose Minkowski sum add to form the hypersections in Fig 2. The 3-dimensional hypersections of both subsets are shown in Figs 3(b) and (c). The upper hypersection represents the maximum number of lines that are devoted to straightness (the floating zone); its dimension is equal to the diameter of the smallest cylinder that envelopes the imperfect axis. The lower hypersection represents all the locations, i.e. the wobble that the floating zone can occupy, within the position tolerancezone t. Rule #1 of the Standard [ASME, 1994] requires a tradeoff between the diameter of the floating zone (i.e. lines devoted to...
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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