there is the filletedge component (works just like the command). However, Grasshopper lacks surface tools, filleting such shape is even manually a difficult problem. You could also decompose the cylinder into blendable pieces and using the rhinocommon method (no component yet) to blend in between. Still without tricks and workarounds Grasshopper is simply not suited for such a task. Unfortunately! You’ll probably be quicker doing it manually if its just a dozen of them.
As an alternative Rhino 7 offers Sub-D surfaces. You can also create them via Grasshopper.
The process here is similar to what I use as the first step in the GH SubD MultiPipe tool (except there there is also a lot of further topological processing to get rid of short edges, turn it into pipes with similar numbers of sides and connect it all up with quads, not just making isolated nodes)
If you’re okay with using SubD you could also use MultiPipe directly, which will be much faster for large numbers of nodes, since it constructs the geometry without having to do these sorts of costly intersections.
For a future release I might also look at having an option for MultiPipe to output these cylinders as NURBS surfaces, since the logic is already in there as an intermediate step.
@DanielPiker, I had a look at the MultiPipe Tool, but it seems to be not precise enough for my needs - All Pipes need an exact diameter of 114mm and the Radius of the Fillet needs to be 20 mm (Rolling Ball diameter)
So the GH-Definition that you sent me is better in my case than the MultiPipe tool I guess.
Could I ask you one more thing?
I noticed that the Rhino Model-units also affect the sript you sent me. - But I don`t find a real logic to when it works and when not. Do you have any suggestion to maximise the succes-rate of your fillet tool? -Thank you!