Re: Waterjet pressures ?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "josef wagner" <josef-
wagner@c...> wrote:

> at ingersoll-rand.de or the equivalent english page you fill wind a

lot of

> information for
> pumps, nozzles as wenn as portal cnc controlled. there is also a

web site

> aliko.fi
> which has a whealthy material on *.pdf files available
> regards from vienna, austria
> josef wagner
>

Thanks,

at yahoo group, waterjets , they discuss this topic in depth.

One of the interesting things is that abrasives are key to cutting
and 20k is a low end for some materials.

also, the pump pressure is not key, but power at the jet is.

Seems a 50 hp with intensifier is about 60% efficient whereas a 20 hp
pump is closer to 95%. that means a 20 hp might offer 19 hp at the
cut and 50 might offer 30hp.

One neat thing I did pick up was that if you wanted to play with
water jet cutting, you don't need all the expensive stuff, but a low
pressure, soft materials cutter can be put together by us home-brew
guys.

Soft plastics, balsa, ??? with just water and not the abrasives.

Also, abrasives seem to be like carbide inserts, you use it once then
toss it. Seems like a waste, or it seems like a resource if you
know of a local shop who will give you the waste water.

Seems that the abrasives can be sifted and re-used. Very time
consuming.

Dave