Your forming run is complete, but the outline doesn’t reach the target. Can the software adjust the starting outline and try again? That is the job of blank or trim-line optimization.
Start with a checked initial calculation. Otherwise, the optimizer may keep adjusting the outline around a problem that belongs elsewhere in the setup.
Choose what to modify
Blank-contour optimization changes the initial blank outline. Trim-line optimization changes the trimming curves.
Iteration 0 must already be computed. Set From stage and To stage to define the part of the process included in the loop.
There are three different objects to think about
Select the Target containing the reference outline. Then choose the object supplying the deformed outline for comparison, usually the blank.
Under Object to modify after comparison, select the starting outline or trimming object that may change.
Keeping those roles separate avoids a lot of confusion. With several outlines or holes, review the explicit linking controls too; the outer boundary doesn’t automatically settle every inner feature.
Decide what close enough means
Read the distance definition, proportion of points required within tolerance and maximum iteration count.
If the stop condition uses a proportion, some points can remain outside the distance limit when it is satisfied. That is how the selected objective works, so don’t describe the message as perfect agreement everywhere.
Look at the outline as well as the history
Assign the optimization and simulation hosts, or choose preprocessing output for a separate launch. Retain the intermediate files needed for comparison.
Use the console, distance histories and geometry together. Local overlap or awkward compensation may be clearer on the outline than in one progress number.
Finally, inspect thickness, forming limits and springback again. The changed outline still has to form. State the actual objective and accepted iteration when reporting it.
If your intention is to change the die shape after springback instead, use die compensation. That is a different adjustment.
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