[TheForge] hydraulics
Ed F
[email protected]
Wed Apr 16 08:00:01 2003
Hi Chuck,
So you pin the clevis of the cylinder between the plates and the barrel of
the cylinder bumps out wider than the plates right? You sent me a picture
like that a while ago. I was thinking of nesting the barrel between the
side plates to save height, but that gets pretty wide. I'll re-think that I
think.
The guy I spoke to said the same thing about the flow divider, as long as
you don't forge off center. It makes sense -when the oil sees more
resistance from one side of the tee, it will tend to go to the other. I was
thinking that might put some ugly twisting on the frame that would be very
tough to predict and accommodate structurally.
----- Original Message -----
From: "Chuck Robinson" <[email protected]>
To: <[email protected]>
Sent: Tuesday, April 15, 2003 10:57 PM
Subject: Re: [TheForge] hydraulics
> Hey Ed,
> My press uprights will be 4"x1 1/2" inch bar stock so when the 1"x 6"
cross
> plates are welded on either side of the uprights there will be a 4" gap
> between them. When I make my dies for drifting and punching the receiving
> die will be on the top cross plates to take advantage of the open space to
> pass the drift through.
> You want to use as long a ram stroke as you can to permit working on large
> work stock and specialty die plates.
> If you are having the cylinder custom made recommend about a 14" stroke.
> Make sure that the cylinder head and rod connection ends use attaching
> fittings that minimize the length need to connect to the press.
> Also I like to build in a little slop in the attaching fittings to
minimize
> side loading on the ram seals when forging off center.
> For what it's worth an old time hydraulics guy told me that if you use
> identical cylinders,fittings and plumbing lengths and sizes the rams
> shouldn't need a flow divider.
> Chuck
>
> ----- Original Message -----
> From: "Ed F" <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, April 15, 2003 9:24 PM
> Subject: Re: [TheForge] hydraulics
>
>
> > Hi Chuck,
> >
> > I just checked into a rotary flow splitter - guy at the hydraulic shop
> says
> > they will start at about $500. Wheew, I think I'll look at doing it
with
> > one again. The inverted style or whatever you call it with the cylinder
> > below the work-surface pulling on tension bars may work ok for punching
if
> > the top of the cylinder is put on blocks to allow for a horizontal hole
to
> > push the slug out with. The blocks would eat up clearance to the floor
> but
> > I was thinking of spacing the low cross-member pieces out so that they
can
> > clear the outside of the barrel. Ya know what I'm sayin?
> >
> > Ed
> >
> >
> > ----- Original Message -----
> > From: "chuck schaeffer" <[email protected]>
> > To: <[email protected]>
> > Sent: Thursday, March 20, 2003 12:11 PM
> > Subject: [TheForge] hydraulics
> >
> >
> > > To everyone interested in Hydraulics,
> > >
> > > Something I picked up from the Batson plans was looking at what the
end
> > product is going to be. Buying a piece here and there makes it very
> > difficult to gain compatibility with all of the parts. I buy all new
> parts
> > due to having been burned on used stuff a couple of times. This also
> allows
> > you to match the parts to give you a better system. Having your plan in
> > mind you can pick up pieces as the funds are available.
> > >
> > > I buy quite a few things from the farm stores around here. Their
prices
> > are good and have it in stock or will order it for you.
> > >
> > > Marathon motors make single phase motors up and including 10 hp.
> > www.marathonelectric.com
> > > The prices they list are considerably higher than what I pay around
> here.
> > >
> > > To hook two cylinders in parallel you will need to place a divider in
> the
> > power side coming from the pump or it could be placed in the return
side.
> A
> > rotary divider will give you the best results. There are other types
out
> > there that use slides to control the flow. Be sure that they are 50:50
> > divider with balancing at one end or the other.
> > >
> > > I agree with Ralph about using the pumps at lower speed and half
volume.
> > Not only quieter but will give you much better pump life.
> > >
> > > Anyone using electric control valves, check for pressure relief.
Those
> I
> > have used required an external pressure relief.
> > >
> > > Sorry I got a little wordy with this.
> > >
> > > Chuck
> > >
> > > Chuck Schaeffer
> > > Metals Magic Shop
> > > [email protected]
> > > Ph. 608.798.4296
> > > Fax 608.798.1940
> > >
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