Hydro as in Hydraulic, not water. In a nutshell, hydroforming is a process
where an aluminum sheet blank for the part is placed over a male mold and
then a captive hydraulic bladder/soft rubber block in brought down on
top of it. When withdrawn the aluminum part is completely formed to the
male mold via the equal hydraulic pressure applied to the aluminum. It
takes a hugh amount of pressure and a very strong cavity to contain the
bladder/rubber block. Too massive of a machine for even a serious
homebuilder but typical for an aerospace job shop.

GaryP

Roberto Waltman wrote in message . ..
I do not know if "hydroforming" and "CNC Waterjet
Cutting" is the same thing.
If it is, or anyhow in case it helps, take a look at
eMachineShop:

http://www.emachineshop.com/
http://www.emachineshop.com/machines...et-cutting.htm

(See "Parts for a home-built airplane",
http://www.emachineshop.com/users/index.htm )


R.W