Three types of bends are available when converting a solid body to a sheet metal part using the Insert Bends or Convert to Sheet Metal tools: sharp bends, round bends, and flat bends.
Sharp Bends
A sharp bend is created by adding bends to a model that has sharp corners and a uniform thickness.
Round Bends
A round bend can be created by adding bends to a model that has filleted or rounded corners and a uniform thickness. Round bends can also be created from cylindrical and conical faces.
Flat Bends
A flat bend is created from a bend line sketched in the flattened sheet metal part. These lines are sketched in
Flat-Sketch1 under
Process-Bends1 in the FeatureManager design tree. The lines across the model in the illustration below on the left are sketched bend lines.