System, method, and device for designing a die to stamp metal parts to an exact final dimension
View Patent ↗A system and method for designing stamping tools that produce parts of desired dimensions. The system and method compensate for post stamping deviations from the desired dimensions in the shape of the tools used to produce the parts. The compensated tools result in nearly ideal parts.
1. A computer readable storage medium storing one or more computer programs comprising a method for designing a die used in stamping a part having final dimensions, the method comprising:
creating a finite element mesh of the part;
simulating a stamping of the part in the die with the finite element mesh;
predicting a springback of the part based on the simulated stamping of the part;
automatically compensating the shape of the die of the finite element simulation based on the springback such that after the springback the part will have the final dimensions desired, wherein automatically compensating the shape of the die comprises projecting a location on the finite element mesh of the part to an adjacent location on a finite element mesh of the die before springback; and
receiving a scale factor and refining the compensated die by applying the scale factor to the compensated die or a further iteration of the compensated die.
2. The computer readable storage medium of claim 1 wherein the die is iteratively compensated in the computer simulation.
3. The computer readable storage medium of claim 2 wherein for each iteration of the die, the die is compensated so as to avoid undercutting of the die.
4. The computer readable storage medium of claim 1 wherein the location on the part corresponds to the location on the die before springback.
5. The computer readable storage medium of claim 1 wherein the location on the finite element is a node or a mesh element.