Single Part Influence on Assemblies for a Cycle Time Able Quality Control as well as a Suitable Toleration

AbstractThe complex interrelations of force and stiffness during the clamping process of freeform shaped parts in car body fixtures cannot be described in a universal valid way by membrane theory. So calculations with FEM are used for this. However due to the long calculating time FEM is not suitable for fast quality decisions during the process. The paper presents a new method that is able to calculate adjustments and combination possibilities of different part failure classes within sub-second range. In addition the new method, that is based on a systematic analyze of the single part influences to the assembly, gives an understanding of the interrelations of all components of an assembly. So a suitable toleration is possible. The method is shown by means of an assembly example