Rule 1 of the standard asme 1994 requires a tradeoff

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Unformatted text preview: tion tolerance t only); all circles are of diameter t and all squares have diagonals of length t. (a) The central hyperplane λ5 = 0. (b) The hyperplane λ3 = 0. (c) The hyperplane λ4 = 0. (d) The hyperplane λ2 = 0. in which each column of matrix [X] represents five Plücker coordinates of one of the basislines $1…$5 in the tolerance-zone of Fig. 1(b). Plücker coordinate R 2 is omitted in eqs (2) because it is a higher order small quantity (and negligible) for every line in the tolerancezone. Since the tilt for each line in the tolerance-zone is tiny, coordinate N is unity for every line [Davidson & Shah, 2002]; then the third of eqs (2) provides the normalizing condition Σλi =1. From the above definitions, every T-Map for an axis is the range of points that results from the mapping [X]-1 applied to every line in a given tolerance-zone. 50 S. Bhide et al. 3. TOLERANCE MAP FOR STRAIGHTNESS OF AN AXIS A straightness tolerance of t'=0.08mm is specified on the axis of the smaller hole in Fig.1(a) with the lower feature control frame . This tolerance defines a floating cylindrical tolerance-zone [e.g. ASME, 1994] of diameter t' and length j, within which all p...
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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.

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