Hello.

Is there any way to create a welding seam (solid) in assembly between parts? 

I reffer to Autodesk Inventor Weld Generator. It is a magnificent and usefull tool that provides extremly simple and effective way of making welding seams.

I am not talking about welding beads that can be created in Solidworks as it doesn't show on a drawing actual welding seam in the cross section views.

Sergey