Re: [CAD_CAM_EDM_DRO] Re: water jet

--- In CAD_CAM_EDM_DRO@yahoogroups.com, alex wrote:
>
>
> metlmunchr wrote:
>
> >Call it hobby or commercial or whatever you may wish, but the fact
is
> >Ron Rogers is simply pointing out what is...and what's
not...practical
> >to do on a simple basis without creating a potential bomb.

A bomb makes one think of an explosion such as with a fire cracker.

A pressure vessel with a non-compressable fluid such as water or oil
will have a leak, lose some drops of fluid, and have reduced pressure
very quickly.

Gasious tanks, oxygen, argon, actetelne, are all compressed and will
expand to many times their presurezed size. My scuba take is 80
cubic feet in less than a 2 cubic foot space.

Damage from ruptured hydraulic leaks on farm and construction
equipment is often in the form of a squirt of oil in the eye.

///They arent operating at 10k/psi and above.

But, steam engines are a different animal.

///Yes they are. Expanding gases are not the only result from the failure of a compressed vessel. I'm referring to expelled debris (projectile). Add up the force on the endcap of a cylinder with a 3" dia. piston and an area of 7.0686" sq/in X 30K/psi (which has been outlined as the minimum pressure required, 60K is the norm) would equal 212,058 pounds of force or 106 tons. Or three fully loaded semi trucks. Or to put it in more direct perspective: 3 1/2 times the chamber pressure of a .308 Winchester high powered rifle (62,000 psi). Calculate for the required large walls of the cylinder. It would be much higher. Double everything to operate at the industry standard for pressure required. Imagine a piece of this breaking free at failure. I dont think it would just harmlessly fall on the table. It might after it went thru a few things.

Hey theres an idea, A small fully automatic machine gun affair the fires 2 mm hardened spikes with a cup shaped face. Each spike shaving a small piece as it progresses. Or maybe a fast reciprocating die the would do the same. Like a CNC nibbler.

Ron

/////

Anyway, I would be interested in anyone who has a home pressure
washer and the desire to get a 10 mil orface and see if it will cut
butter or a chicken wing or a piece of wood.

Dave







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