Does anybody know what a 40-90° annotation means on sheet metal folding?
I have a sheet metal drawing trying to model with autodesk inventor and at the folding line it is showing an annotation of 40-90° with a leader line pointing to the fold line. I understand the 90° means the folding angle, but what does the 40 mean?
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I'm just guessing since you haven't posted an image of the drawing, but it could be the bend angle should fall within the range of 40 degrees to 90 degrees or that it is a 90 degree bend with a 40-mm radius. Just a WAG.