US 12,282,717 B2
Method and procedure for evaluation and compensation of springback
Evangelos Liasi, Royal Oak, MI (US); Liang Huang, Troy, MI (US); Robert Vaughn Degenhardt, Belleville, MI (US); Christian Richard Genereux, Brighton, MI (US); and Ryan Muirhead, Northville, MI (US)
Assigned to Ford Motor Company, Dearborn, MI (US)
Filed by Ford Motor Company, Dearborn, MI (US)
Filed on Jul. 20, 2021, as Appl. No. 17/380,464.
Prior Publication US 2023/0028435 A1, Jan. 26, 2023
Int. Cl. G06F 30/23 (2020.01); G06F 30/15 (2020.01)
CPC G06F 30/23 (2020.01) [G06F 30/15 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A method for compensating springback of a part, the method comprising:
a) running a finite element analysis (FEA) simulation of forming a panel using a model of an Alpha(i) forming die such that an Alpha(i) panel with springback is simulated, wherein i=1;
b) determining at least two locations on the Alpha(i) panel and simulating an aperture at each of the at least two locations, wherein the simulated apertures in the Alpha(i) panel comprise hanging apertures;
c) running an FEA simulation of the Alpha(i) panel hanging from the hanging apertures in an installed orientation and in a stress-free state except for an effect of gravity;
d) comparing a geometry of the hanging Alpha(i) panel to a geometry of a reference panel and determining a difference between the geometry of the hanging Alpha(i) panel and the geometry of the reference panel due to the springback;
e) incrementing i to equal i+1;
f) generating the Alpha(i) forming die model with at least one morphed die surface as a function of the difference between the geometry of a hanging Alpha(i−1) panel and the geometry of the reference panel due to the springback;
g) running an FEA simulation of forming the panel with the hanging apertures using the Alpha(i) forming die model such that the Alpha(i) panel with springback and at least one morphed surface is simulated; and
h) repeating steps c) through g) until the difference between the geometry of the hanging Alpha(i) panel and the geometry of the reference panel due to the springback is less than a predefined delta value.