I have a 400 mm diameter x 4 mm thick Al plate in which a 200 mm diameter hole will be cut out of the middle (LHS in pc) and would like to make it slightly dished/conical shaped with a press and some heat. Basically I want it to look like ether blue one but without teh collar.
IMG_3055.jpg

I have a strong steel pulley that is 250 mm in diameter and now need a loan of a ~350 mm steel hoop or piece of steel with a hole about 350 mm in diameter to act as a temporary die/base. The amount of dishing from outer edge to edge of the inner hole needs to be about 20 mm. I have no idea if this will work or not.
IMG_3058.jpg

I was going to use wood for the 350 mm hoop but given that heating with a propane will be involved then wood is out

Can anyone local loan me a hoop or a piece of steel with a ~350 mm hole in it? If not then I will make one out of some strap.
Attached Images




Read the full thread at metalworkforums.com...