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Unformatted text preview: olerance intervals, tolerancing significantly affects the assembly. Figure 4(b) shows part P7 as the configurations space obstacle of P4, without tolerances, and when each variational parameter has a ±0.3mm tolerance interval. The obstacle and the origin determine the directions in which P4 is free to move without colliding with P7 (shown in Figure 4(b) as part of the unit circle). Thus, unlike the nominal assembly, there are instances of the assembly in which of P7 blocks the directions separating P4 from P3, and therefore P7 must be removed first in the disassembly sequence. 74 Y. Ostrovsky-Berman and L. Joskowicz
4. CONCLUSION We have presented a framework for worst case analysis of toleranced planar assemblies. The framework is more general than existing ones in terms of the geometry of parts (line and arc segment boundaries) and the tolerancing model used. The sensitivity matrices of each part vertex that are computed by our algorithm can used to compute the tolerance envelopes bounding the areas occupied by the 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.
- Spring '10
- The Land