The effect of clamping sequence on dimensional variability of a manufactured automotive sheet metal sub-assembly

The use of holding and inspection fixtures is common across many sectors manufacturing. concept a fixture for component, the purposes assembly or inspection, straightforward. design associated clamping strategy can have significant impact on process. This paper presents methodology investigating effects sequence production fixture, dimensional variability an automotive production-representative sheet metal sub-assembly, along with experimental findings analysis measurement data. study utilises both coordinate measuring machine laser tracker to capture range features surface points, compares four different sequences, including manufacturer’s defined sequence, evaluate their effect results from predetermined plan. show that there was variation in measurements taken these variations same points and/or being within tolerance one out another. clearly has major implications product development subsequent volume manufacture, so needs be considered optimised planning