Re: help on *** forming process!


"Ed Huntress" <huntres23@xxxxxxxxxxxxx> wrote in message
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"Chas Hurst" <hurst1@xxxxxxxxxxx> wrote in message
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"Ed Huntress" <huntres23@xxxxxxxxxxxxx> wrote in message
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"RoyJ" <spamless@xxxxxxxxxxxxx> wrote in message
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The easiest way to do this is in a good sized roll bender...

"Good sized"? Roy, 15mm material thickness is over 0.59". The cone is
attached to the straight cylinder, so one edge is going to have to be
stretched or the other is going to have to be shrunk -- or a little bit
of both -- while you keep that blend radius intact.. And this is
stainless! You can't just roll it. you have to iron it at the same time,
and ironing it out so it doesn't twist is going to be an extreme
metalworking job.

Unless you have access to the machines used for making Saturn V rocket
nozzles, I think there is a problem here. d8-) The forces involved are
astronomical.

--
Ed Huntress


That 15mm must a typo. If the ring is truly that thick, a blank ring
could be rolled and welded, then turned on a lathe.

With a 1900 mm diameter? Even for a VTL, that's a big piece of work, and
it isn't going to be cheap to get it done. The material cost alone --
especially if you roll the cone section, which would have to be cut out of
a pretty large plate of 15 mm stock (assuming it's not a typo) -- would be
a hefty chunk of change -- over $3,000 for that one piece of plate. The
stock for the cylindrical ring will be on the same order. Then there's
rolling, and welding, and turning. That assumes it was done by someone who
is really expert and that it doesn't wind up being all distorted out of
shape. With 1/2" - plus stainless, that's more than a little problematic,
matching a cone to a cylinder.

As I said, it's all a matter of how much money one has. The total job is
going to run into five figures. This is extreme stuff. I think the first
point here is to see if the OP is aware of what the cost is likely to be.

--
Ed Huntress

I'd didn't say it would be cheap.
There are companies that specialize in rings and one this size is would be
no problem at all. I think the whole ring could be made from one piece and
turned on a vertical lathe, eliminating welding.


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