Abstract
In forming process of tailor welded blanks(TWBs),weld-line movement leads to the inconsistency between the design weld-line and the actual weld-line.Therefore,aimed at the deep drawing process of TWBs,a weld-line compensating approach based on pre-offset is proposed,which employs the incremental finite element method(FEM) solver.A mesh model for FEM analysis is created.By comparing the difference between the designed and the formed weld-line,an estimation method is deducted.An optimization model is established,in which the nodal pre-offsets of the weld-line are selected as design variables and the minimum deviation between the designed and formed weld-lines is selected as the objective function.The weld-line movement during the forming process is compensated through FEM iterative solving,thus reaching a positional agreement between the formed weld-line and the designed one.An example shows the feasibility of the proposed approach.
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