You can, it'll be tough to do, and will take some time.
Since the thickness varies the draft, the rounds you want to create will
have to be of a variable radius, (am I seeing it right?). If such is
the case I would start constructing some datum curves at the ends of
where the rounds are going to be going and start "wireframing" some
entities to used to drive surfaces. Get the surfaces in, and start
working out how to make cuts, or solids, and go from there...
This is just a simple guess as to how to do it, yes it can be done but,
it will take some experimenting to find a reasonable method to do it, I
don't think it is a quick click away.
So... the question begs... do you really need a true full round? It
looks like the ribs are supporting a boss, a simple constant round
through the area may be good enough (just make it small to start, and
tweak up in size until it is as close to a full round as permissible).
You could try a variable radius round and even get closer by allowing
the radius to increase linearly along the edge.
Erik Peterson
Sr. Product Engineer
