Hence the factors do not change with tolerance

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Unformatted text preview: ools and fixturing schemes. It is assumed that the locator errors are uniform distributions in the range of [-0.02mm. 0.02mm]. All process errors follow normal distribution. With given information, the stack up module provided simulation results of all design requirements and indicated that unsatisfied requirements. The sensitivity analysis of features with design requirements has been performed. Selected results are shown in 218 H. Song et al. Table IV. For feature 8, the locator errors and process errors of processes 5 and 6 are also major contributors. This indicates that improvement of those factors can enhance the parallelism of feature 8 with respect to feature 11 more effectively. Figure 1; Example workpiece for tolerance stack up analysis. Material: Aluminum Alloy SETUP 1— locating surface: 6,3,4 PROCESS1: Tool axis direction:+X; Feature 2: plane IT: 9 Ra: 125 face mill PROCESS2: Tool axis direction: -Y; Feature 5: plane IT: 9 Ra: 125 face mill D:1.2 D:1.2 L:3 L:3 SETUP 2— locating surface: 5,3,2 PROCESS3: Tool axis direction:+Y...
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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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