> Looking for ideas on sweding, have hyd 200 ton press. Like to swed 2 inch
> to 1/2 inch Al tube.
>
I have a feeling you meant swaging and not sweding which has nothing to do
with reducing tube diameter.<:-)) (seems like that used to be spelled
swedging?) at any rate from 2" all the way down to 1/2" is more than is
usually done due to a number of factors such as hardening, wall thickening,
and a wrinkle free transition. OTOH, it's done in steps of maybe 1/8" at the
larger diameter and progressivlely smaller steps as the diameter gets
smaller (and the wall gets thicker and harder)
It would probably be much easier to roll it with slowly increasing pressure
which works very well and is a much simpler process than extrusion. The
tubing is just stuck end on between three rollers which are slowly brought
closer together.
Although you can go from a diameter of 2" to 1" it's not often done where
strength and life are both requirements.
The biggest problem with doing it in a press is being able to grip, or block
the piece and particularly if much of any length is involved.
Of course I made the assumption that you only wish to reduce a length at the
end of the tube to have a smaller tube fit in.
Try using "swaging metallurg methods" in Google for pages of swaging
methods. There's enough there to keep busy through many a cold night. <:-))
73
Roger (K8RI)
> Dan NN7J
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