I am working on a design series that involves attaching small
concave (half sphere) cups to flat sheet - the cups are “open” like a
flower - with rivets. This requires a tool that will fit inside the
cup to set the rivet which is made by balling wire. Any suggestions
for a tool to use that will not flatten the rivet head? I have
thought of modifying a round punch with a hole in it for the rivet,
but I am not sure my skills and tools are up for that. Does anyone
out there have any other suggestion? Thanks in advance.