Round corner brep contour

Hello, I have a brep which is sliced into several pieces. The brep is built up bu curves. I would like to rounden the edge of the pieces like in attached sketch. Any suggestions?

Thanks! (113.7 KB)

Like this? (122.5 KB)

Yes exactly, is it possible to instead of making the edges lineas with each other? And let the rounded edges e approximately 3 cm, since the shape of the edges are not equal…?