[TheForge] treadle hammer design (was: treadle hammer anvils)

Fri Jan 24 04:29:03 2003

At 12:27 PM 1/23/03, you wrote:

I was wrong when i said that a split weight ( counterbalancing ) would be 
slower..misread, sorry.
But if the hammer head only had 1/2 the weight  it would be less efficient 
because the mechanism would absorb some of the blow. Think of how much 
difference there is  just working on the heel VS the middle of the anvil 
face.  When the hammer isn't directly above the work and/or the anvil mass 
isn't directly below the work, considerable loss is the result. To get the 
same forging effect, the counterbalanced assembly would have to be 
considerably heavier than a conventional sprung TH. It would, however, have 
some compensating virtues. If nothing else, those tensioned springs spook 
me. Garage door springs kill people.
Larry, why bother with a light spring? just shift the counterweight out a 
little.....Pete

>Like a teeter toter?
>Saw one of those in a website with some Asian content. Two kids stood on 
>the back. Rails on the side of the beam so they. When a hit was callled 
>for they just pushed down on the beam. Yeah could work if yoou have smart 
>weights.
>  DragonsWatch <[email protected]> wrote:I have looked at the 
> designs of several different styles of treadle hammer. And they all seem 
> to have one thing in common, some sort of lever and large springs which 
> lift the hammer, and a treadle to over come the springs and lower the 
> hammer. So I ask, what would be the result if the springs were replaced 
> with a weight great enough to balance the hammer. Then a light spring 
> could lift the hammer. Say a conventional design has a hammer of 50# and 
> the operator can accelerate that weight to say 5 fps and the travel is 8 
> inches. You would have an
>impact of XXX pounds per sq. inch. If you had a hammer where the head was 
>balanced, say 25# hammer and 25# counterweight, would it not strike at the 
>same pounds per sq. inch when moving at 5 fps?
>This does require the ram and the weight be rigid to each other. The point 
>being is that you still have 50# of mass in motion, and the energy is 
>transferred in the blow, not in the motion of the head. Seems somewhere it 
>is written that a mass in motion will remain in motion, or something like 
>that. Just something to think about. I'm sure I am over looking some 
>obvious law of physics that says this is not how things work.
>
>Larry
>
>
>_______________________________________________
>http://mailman.qth.net/mailman/listinfo/theforge
>theforge mail list group photo site is
>http://www.photoaccess.com
>Login: [email protected]
>password: anvil
>___________
>
>
>
>
>---------------------------------
>Do you Yahoo!?
>Yahoo! Mail Plus - Powerful. Affordable. Sign up now
>
>--- StripMime Report -- processed MIME parts ---
>multipart/alternative
>   text/plain (text body -- kept)
>   text/html
>The reason this message is shown is because the post was in HTML
>or had an attachment.  Attachments are not allowed.  To learn how
>to post in Plain-Text go to: http://www.expita.com/nomime.html  ---
>_______________________________________________
>http://mailman.qth.net/mailman/listinfo/theforge
>theforge mail list group photo site is
>http://www.photoaccess.com
>Login:  [email protected]
>password:  anvil
>___________