[TheForge] Power hammer questions/Frosty

Wed Apr 9 23:44:00 2003

But you really need quite a bit more than just enough. You need to 
accelerate the ram at a fairly high rate. I've heard estimates of 3x to 
5x the balance pressure, so for a 100 pound ram 4 square inches would be 
  on the small side (given that these hammers operate at relatively low 
pressures).

Steve Smith

R.C.Mundt wrote:
> Seems to me what is needed is to create enough pressure to raise the ram.
> If the ram weighs 100 lbs and the area of the piston is 4 square inches then
> we need to create 25 psi to raise it, plus a scunch more to over come
> friction.  There is some kinda formula for calcluateing  displacemnent and
> air pressure but it's been a long time since I had a class in physics and I
> can't remember what it it is. I've been semi looking for this, anyway if
> this surfaces it should be a simple matter to calculate exactly what is
> needed.
> Randy Mundt
> ----- Original Message -----
> From: <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, April 08, 2003 1:42 PM
> Subject: Re: [TheForge] Power hammer questions/Frosty
> 
> 
> 
>>>My ONLY claim on this is having understood the 19th century Brittish
>>
> english
> 
>>>lawyerese well enough to understand how Massey's valves work.
>>>
>>
>>______
>>
>>Frosty,
>>
>>i have been working thru this and have one more question. Do you know what
> 
> the relationship (volume) between the pump cylinder and the ram cylinder is
> on the Massey hammers?
> 
>>Mark Krause suggested 2-1 for his Nazel takeoff. 2-1 seems to me to be too
> 
> much extra air to get rid of. Theoretically 1-1 seems like it would be
> enough but...?
> 
>>Thanks.
>>
>>Bob Schade
>>
>>
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