[TheForge] Air Hammer Guides

Sun Apr 28 15:08:00 2002

        Shannell, Thanks for the input, I've been working in so many other
directions lately, this has not been a priority at all.  I already have two
power hammers and a hydraulic press so I'm in no rush to get it done.

Ralph


----- Original Message -----
From: "Shannell Sugrue" <[email protected]>
To: <[email protected]>
Sent: Sunday, April 28, 2002 10:09 AM
Subject: Re: [TheForge] Air Hammer Guides


> I think 12" would be enough, I cant recall all my dimensions but mines
> about 60% in 40% out at the bottom of stroke. Mine does move a little if
Im
> hitting in a way to put side loading on the dies, but its no problem at
all.
> There were some photos of my setup on the old photo site but thats gone
now.
>  Ralph I put a slot in my guide and have a 2" ramp sticking through the
> slot, my roller switches are on a slider I cobbled together from an old
> printer, they have a spring tensioner to keep them where I put them. One
> problem here is the switching time for a double pilot valve can be too
> short, "stalling" the hammer by not giving enough of a pulse to switch the
> valve when you are going full speed with the 2 rollers close together. Ive
> nearly eliminated this by having minimum tubing from the rollers to the
> valve and using small tubing which helps keep the signal quick. Also pay
> attention to how you attach the ramp to the ram if you do it the same way
I
> did, Ive had a few problems with this breaking welds and loosening
loctited
> bolts.
>
> ----- Original Message -----
> From: "John Newman" <[email protected]>
> To: "the forge" <[email protected]>
> Sent: Sunday, April 28, 2002 2:34 PM
> Subject: [TheForge] Air Hammer Guides
>
>
> > I have finally started welding up my air hammer frame.  I just thought I
> > would get opinions on dimensions of my guides before welding that tube
> > to the rest of the frame.  Ralph Sproul and Shannell's  UHMW guides
> > seemed like a good idea so that is what I am building.  I have a 6"x1/4"
> > square tube that I have drilled and tapped to hold 18" of 1/2" UHMW.  I
> > am putting a 20"x 4.5" square tube inside.  The distance from the top of
> > the bottom die to the bottom of the guide tube will be 10", with a 2"
> > thick die this will leave 12" of bearing are at full extension, is this
> > enough? is the extension too much?  I am using a 12" cylinder to start
> > with, because I have one, but I am going to make sure it can be easily
> > changed  to a longer stroke.
> > I'm putting a hydraulic press on the back side of the hammer (another
> > idea taken from Ralph) I am thinking of using the same sort of guides
> > for the press.  Will they work? or are they even neccesary, would two
> > nesting tubes be enough?
> >
> > John Newman
> >
> > _______________________________________________
> > http://mailman.qth.net/mailman/listinfo/theforge
> > theforge mail list group photo site is
> > http://www.photoaccess.com
> > Login:  [email protected]
> > password:  anvil
> > ___________
> >
> >
> >
>
> _______________________________________________
> http://mailman.qth.net/mailman/listinfo/theforge
> theforge mail list group photo site is
> http://www.photoaccess.com
> Login:  [email protected]
> password:  anvil
> ___________
>
>