We are building a mandrel to bend a 3" rad(6" dia.) on a 14" long piece of
1/8" 3003. Problem we are encountering is the amount of springback opens the
piece back up to 7 1/4" dia. Even when held in place and heated to relieve
tension the part still has more spring than we would have thought. This
doesn't happen when we spin it but in this particualr case we need to mandrel
bend the part. Any help would be greatly appreciated. We are also planning to
bend other rads so trying to build the right diameter mandrel first time is
essential.

--
+-------------[ SERVER SIGNATURE ]----------+
| posted via http://www.polytechforum.com |
| Web, RSS and Social Media Interface to |
| rec.crafts.metalworking and other groups |
+-------------------------------------------+