I'm trying to find a pattern to turn a flat piece of sheet metal into a hemisphere. Can anyone help me?

I've downloaded Pepakura and I can't figure out how to do it. My ultimate goal is to make Peas in a pod out of sheet metal for my wife. I've made the pod (and figured out how to work with, and weld sheet metal in the process. I don't know how I'm going to make sheet metal spheres about the size of baseballs. I've seen on "how it's made' how they used flat sheets of paper, die cut them, and then kind of folded them over a hemispherical form to make half a globe. I just need that pattern. Anyone? Thank you! Steve

Uncle Kudzu8 years ago
Paper Models of Polyhedera. Free PDF models.

Alerick8 years ago
Metal Spinning is going to create the best hemisphere
It's time to work on your hammering skills. There are power tools you can buy to help with this, but essentially the process is to use a hammer and a rounded anvil to beat-out the shape you're looking for. Easiest to two two half-spheres and then weld together for a full sphere.
jtobako8 years ago
Try here for how to design and cut a pattern for a hemisphere.

You could cut equilateral triangles and weld them together (twenty make up a 'sphere'), look up 20-sided-die for the pattern.

You could use a modified baseball pattern. Cut the design in half, one the long way and the other the short way.