41 pp 2233 2243 lee et al 2000 lee j long y and

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Unformatted text preview: e next simulation. Table 1: Correlation coefficient Rmean and R6 for the different simulations # 1 2 3 4 5 Modeling aspect Simultaneously joining Springback for part 1 and 2 Welding performed in clusters Removal of inspection points Mating surfaces are modeled with contact elements Rmean 0.08 0.11 0.23 0.43 0.79 R6 0.11 0.21 0.45 1) In the first simulation the part variation is applied to all single parts. Part 1, 2 and 3 are joined together and then to part 4. All joining to part 4 is done simultaneously. Since a balanced gun is used, an influence matrix is calculated in order to apply the correct forces in the weld points to prevent over closure of the weld points. The result from the first simulation (Rmean=0.08) is not consistent with the measured data. The comparison with variance is therefore not performed. 2) The assembly is divided into two assemblies so that part 1 and 2 can springback before they are joined to part 4. The result from this simulation does not improve Rmean significantly, however, this is more similar to the real assembly process and...
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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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