Re: [CAD_CAM_EDM_DRO] Re: water jet

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.
>

Why is this frightening talk about the bomb? I didn't suggest to supply
more then 10,000 psi of pressure for 10,000 psi rated cylinder...
I suggested to use this cylinder as a first step to get a feel of
cutting - oil could be used instead of water since it has oil seals.
It is easy enough to calculate wall thickness , number of tie rods for
any cylinder - with a safety factor...
Alex

> This is
>based on what is currently known and accepted as fact by people who
>build and use waterjets, and no amount of dreaming is gonna change
>that. The major fact among those is that the lower limit of pressure
>for cutting steel is in the 30 to 35 thousand psi range, with
>abrasive. No amount of conjecture about 10,000 psi hydraulic
>cylinders will make them useful for a waterjet when you in fact need a
>40,000 psi cylinder. Just building the the tank and a mechanism to
>raise and lower the water level in the tank (they cut submerged)would
>be a healthy undertaking, and that's probably the simplest part of the
>entire machine.
>
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