[TheForge] 15Ton Press

[Ralph Sproul]

        Steve, Chuck sent me a picture of his press, and it seems like a
nice design.  It would work great for billets and straightening, but when
you upset in a press, the dies really want to move to the side with the
resistance to the metal being moved.
        My guides are faily tight, and I have to wrestle with this whem
making upset feet and components.

Ralph


----- Original Message -----
From: "Steve Smith" <sos@alum.mit.edu>
To: <theforge@mailman.qth.net>
Sent: Sunday, January 06, 2002 11:38 PM
Subject: Re: [TheForge] 15Ton Press


> It does seem like a weird way to work, but it works. Ralph has a good
point,
> though. Steve Rollert is making knives on his.
>
> With the cylinder on the bottom you should end up with less steel in your
framework
> too.
>
> Steve
>
> Ed Fasula wrote:
>
> > I can see how that C style press would get really heavy.  Torque is
always
> > expensive to resist, eh?  The H design is much more efficient, but I
can't
> > see how a guy can work with the eye-level of the piece constantly
> > moving.  It just seems odd to me.  But I never tried it.
> >
> > What advantage is there in putting the cylinder on the bottom other the
> > keeping the center of gravity low?  If you want you can look at my
sketch
> > to see what I have in mind:
http://www.geocities.com/edfasula/smithing.html
> >
> > Thanks.
> > Ed
> >
> > At 10:13 PM 1/5/02 -0700, you wrote:
> > >Consider putting the cylinder on the bottom and having a fixed top
die/moving
> > >bottom die. Steve Rollert has his press that way and it works fine.
> > >
> > >I have a C style 35 ton press with the cylinder on top. It is over 7'
tall and
> > >weighs a ton (well, not that much). It would probably weigh a third as
much if
> > >it were both H frame and cylinder underneath.
> > >
> > >Steve Smith
> > >
> > >Ed Fasula wrote:
> > >
> > > > Hi Chuck,
> > > >
> > > >  >...have to be extremely tall to accommodate a 32" cylinder...
There are
> > > > enough advantages to my design over the cylinder on top that I
> > > >  >wouldn't recommend that route.
> > > >
> > > > Oops.  Brain fart.  32" is the one for splitting wood.  The press
cylinder
> > > > is 6"x24"
> > > >
> > > > Here is a link http://www.geocities.com/edfasula/smithing.html
> > > > to a sketch of the current thought I have for a structure.  I think
I can
> > > > keep it under 8' without too much worry.  Please criticize now, not
after I
> > > > build it!  What disadvantages do you see with the cylinder on top?
While
> > > > you're at it, let me know if you have any input on my plan with the
pilot
> > > > valve (there also).  [Also not how I try to pass of images from my
scanner
> > > > as digital camera pictures.]
> > > >
> > > >  >I'm not clear
> > > >  >on why you need to vary the motor speed in a hydraulic system.
> > > >
> > > > Because I'll probably split wood with the pump (run out the forge
door with
> > > > hoses with quick connects) and I want it to go fast enough.  But I
hear
> > > > (here) that the pumps scream at 3600 rpm.  I'm not sure what speed I
want
> > > > the ram to travel at.  Some in the book went 2"/sec.  That would
take 3600
> > > > rpm with the pump I'm looking at.  So if I decided if I really
wanted to
> > > > run the press at that, I could, but sill turn it down for delicate
work or
> > > > if I was sick of the racket.
> > > >
> > > >  >...why I'm using the C P
> > > >  >pump.The flow is full volume until you reach the maximum pressure.
> > > >
> > > > Do you know what ram speed full volume gives you?
> > > >
> > > > Hope you health is coming back well for you.
> > > >
> > > > Ed
> > > >
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