`Detroit radiator tube stamping consulting case` (matches existing canon)

~25-year-ago consulting case (~1987). Progressive-die sheet stamping for brazed carbon-steel heat exchanger tubes with turbulators. Illustrates progressive cupping/drawing on flat stock.

Unfortunately these are getting a little rusty. [Tom produces a progressive die sample.] This is something I probably consulted on 25 years ago in Detroit. I think the guy was an MIT alum. The parts they were making were radiators. In order to make the tubes, they made everything from sheet metal, and they would stamp out — what we see here is a progressive die. A piece of sheet that goes through a progressive die.