Max static force a rock drill/jackhammer can provide
Max static force a rock drill/jackhammer can provide
(OP)
Hi,
I am working with the idea of using a rock drill or jackhammer for vibrating a heavy object. I'm not very familiar with pneumatic systems so I'm having problems determining the max static force one of these could provide. For example say with a weight attached above it, so it's supporting the entire weight, though that's probably not how I would configure it. Just clarifying that this is not impact force but an attached weight.
Looking at a drill like this Grainger Air Rock Drill I've guess-timated that the max static force would be the PSI provided times the bore size, or 90 PSI * 4.91 In^2 = 441.8 Lbf in this case. Is this a reasonable way to estimate it? Or is it more dependant on the air compressor supplying the pressure (IE can the compresser keep up 90 PSI with a heavy load).
I'm not looking for exact calculations just help with understanding the general concept.
Additionally does anyone have any idea if a drill like the one I linked uses springs for the return stroke or if it's powered by the pneumatic system. My impression was that the pile driver is powered pneumatically while the bit returns to position by a spring. This would mean I couldn't rely on the hammer for much of a return force at all.
Thanks,
Mechy011235813213455
I am working with the idea of using a rock drill or jackhammer for vibrating a heavy object. I'm not very familiar with pneumatic systems so I'm having problems determining the max static force one of these could provide. For example say with a weight attached above it, so it's supporting the entire weight, though that's probably not how I would configure it. Just clarifying that this is not impact force but an attached weight.
Looking at a drill like this Grainger Air Rock Drill I've guess-timated that the max static force would be the PSI provided times the bore size, or 90 PSI * 4.91 In^2 = 441.8 Lbf in this case. Is this a reasonable way to estimate it? Or is it more dependant on the air compressor supplying the pressure (IE can the compresser keep up 90 PSI with a heavy load).
I'm not looking for exact calculations just help with understanding the general concept.
Additionally does anyone have any idea if a drill like the one I linked uses springs for the return stroke or if it's powered by the pneumatic system. My impression was that the pile driver is powered pneumatically while the bit returns to position by a spring. This would mean I couldn't rely on the hammer for much of a return force at all.
Thanks,
Mechy011235813213455





RE: Max static force a rock drill/jackhammer can provide
Consider, instead, a vibratory device like those used to shake rock crusher bins or dry product bins.
Ted
RE: Max static force a rock drill/jackhammer can provide
http://www.modalshop.com/excitation/excitation.asp...
http://www.etssolution.com/shaker-l215m.php
http://www.labworks-inc.com/general_purpose_system...
Is it a single frequency? If so, there can be some reduction in volume relative to a standard head.
TTFN
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RE: Max static force a rock drill/jackhammer can provide
@IRstuff - I'm in the process of finding the weight of the object myself but it is considerable, it's cylinderical, mostly steel, approximately 1 ft diameter 6ft long, and somewhere around 750-1000 lbs. So I don't think it would fit in one of those shakers (I saw those before and I'm assuming you place items inside of them).
RE: Max static force a rock drill/jackhammer can provide
RE: Max static force a rock drill/jackhammer can provide
THIS one is rated at 77,000 lbf:
http://www.etssolution.com/shaker-mpa3798-h3580a.p...
Given your description, a jackhammer probably wouldn't have budged your object much.
TTFN
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RE: Max static force a rock drill/jackhammer can provide
Static force is hardly the description I would use for the output of a dynamic reciprocating device. Force amplitude maybe.
Ted