The split area splits the driving surface into two or more areas and you then add a bend to the surface you want to bend no need for an additional extrude to refill geometry.
Creo sheet metal roll bend.
Sheetmetal roll bend you can use sheet metal module to model these things but you can t generate a flat pattern using sheet metal.
Now that you have a sheet metal part just go to the edit bendcommand.
The parts you are making are not made with a press brake using a straight bend s.
Now you can use the draggers to change the angle or radius.
There are some methods you can use to roll your sheet but all of them have some problems you ll need to be aware of.
Create internal sketch.
Click edit bendin the mini toolbar.
I don t know what you re actual geometry is but i m not sure we are talking about the same thing.
For this kind of thing i think a spinal bend is a better choice than a toroidal bend.
Start by selecting the bend surface.
How to create sheet metal bend through flat area.
In this video you can learn how to create toroidal bend feature or how to create a tire rolling solid model.
Exercise 21 sheet metal cylinders and linear patterns.