Weld pattern optimization for sheet metal assemblies

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Unformatted text preview: he components of the deviation torsors relative to the body make only appear the adjusting device values. Concerning the deviation torsors relative to the door, the component are null at points P1, P2 and P3 since these points are reference points. A unique deviation component appears on point 4 the value of which is measured. Geometrical Study of Assembly Behaviour 309 At this stage of the method, the situation of all the points of the mesh is known as a function of the adjusting device values while considering a non over constrained positioning. The distance between the points of the door and the corresponding points of the body are known through symbolic equations. The whole of these distances is translated to boundary conditions as shown in section 3 and the resulting set of equations is solved. For each node of the mesh, the deviation between the actual geometry including deformations is then known as a symbolic equation. The third step of the method consists in determining the values of the adjusting devices. At this stage of the simulation, we know the linear relations that link the values attributed to the adjusting devices...
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