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The objective of this paper is to investigate the effect of stamping process on oil canning and dent resistance performances of an automotive roof panel. Finite element analysis of stamping processes was carried out using LS-Dyna to obtain thickness and plastic strain distributions under various forming conditions. The forming results were mapped onto the roof model by an in-house developed mapping code. A displacement control approach using an implicit FEM code ABAQUS/Standard was employed for oil canning and denting analysis. An Auto/Steel Partnership Standardized Test Procedure for Dent Resistance was employed to establish the analysis model and to determine the dent and oil canning loads. The results indicate that stamping has a positive effect on dent resistance and a negative effect on oil canning performance. As forming strains increase, dent resistance increases while the oil canning load decreases.

Since riveting operations on airplane panels are usually performed manually by skilled workers and unrecoverable tolerances or errors are possible. In this paper, a semi-automated riveting system, which improves the product quality, and reduces cost, is proposed. The system setup is illustrated while related technology is described. The system uses optical equipment along with computer vision technology to assist riveting operators to find the locations of the rivets automatically, which may help reduce some setup procedures for riveting operations.