I'm toying with the idea of re-designing a custom tool we use. Essentially, it's a portable pin punch (to break welds) that uses an air cylinder to drive a hydraulic intensifier and then pushes the punch. Yea, like that's portable (50+ pounds)
Currently we get about 7000 psi over a 5/16" dia tip. That's overkill for 95% of the uses. Typical use is a couple of hundred cycles at a time.
Anyway, one option is a rotating threaded bar to act as the pressure creating device (similar to a chain breaker only bigger). This would require a thrust bearing between the screw and the tip, as the tip cannot rotate. Any ideas on a thrust bearing system that would take the pressure and still keep friction down to the minimum? The bearing needs to be less than 1" diameter if possible. Using this the cycle time would be longer, but that won't matter as even a 20-30 second cycle would be ok. Takes a minute or so to re-clamp anyway so cycles are only a small part of the process.
Any other ideas on how to move a 5/16" pin to put a couple of tons of pressure with about a 1/2" stroke and still keep the thing small enough to work over your head if you need to?
BTW, already considered air powered hydraulic pump at 10,000 psi....is not quite idiot proof enough for our application. too many hoses.
Just searchin for any ideas
Koz