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An automotive body is composed of compliant sheet metal parts. Fast and exactly diagnosing variation sources is very important
when assembly variations happen. This paper proposes a diagnosis method of multi fixture variations based on the variation
model of compliant sheet metal assembly. The assembly variation model is obtained by using the method of influence coefficients
(MIC) and considering the manufacturing variations of compliant parts and multi fixture variations. The measurement point
variations induced by part manufacturing variations are firstly removed from the measurement data. The variation patterns
of multi fixture variations are constructed by column vectors of fixture variation sensitivity matrix. This method is proved
to be feasible for exactly diagnosing the fixture variations and has higher diagnosis efficiency than designated component
analysis (DCA). 相似文献
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