Ceilidh ... New Trick for Old Dog

Hydraulic Die Forming Discussion Group

New Trick for Old Dog

Ok, not really that new , and I aint really old , but we need catchy titles. This one evolved out of other previous ones (as do they all)
and addresses the problem which almost ruined the dragonfly.

Another one-step cut-and-form die, with attached forming module, by now almost routine ,except for sawing through a hard batch of 3/32"
tool steel.This is a special kind of torture you should avoid if at all possible. About 3"x3" with a brass form made from 10 ga sheet, shaped. This time I simply vise-gripped the form to the die and drilled holes for pins. The die had holes drilled , with a slight countersink on the back , before heat treating .

Next, the form had 1/16" dia. steel pins soldered into it. These fit
the holes in the die, and next it's either spot solder the pins that protruded out the backside of the die. OR !!!, use the pins as rivets
with the countersink acting as resivoir for the rivet head. Well, the hole/pin fit was very tight, and the form got bent (might have been all the hammering (^:#) and there was no getting it off for flattening it, and no flattening it in place. UNLESS !!! ... the process of riveting it in place were to draw the form up snug to the die, which it in fact did pretty well.

Screws? , rivets?, soldering?.... Yes please, all three; I can't decide between them.

Dar

Wed May 22