[TheForge] Air hammer return stroke

Sat Feb 1 11:04:01 2003

A spring is what I had in mind, per my first email. I haven't figured 
out a good way to use an air cushion. Ideas welcome.

So the problem is that it takes quite a spring. Springs are expensive. 
Anyone know of an inexpensive source?

Steve Smith

Darrell wrote:
> On a self contained hammer should only top out during idle and air should
> stop the rising cylinder starting the next hammer blow. You need either an
> air cushion at the top of the cylinder or some spring just to keep the
> cylinder from banging during idle.
> 
> Darrell
> 
> ----- Original Message -----
> From: "Steve Smith" <[email protected]>
> To: "theforge" <[email protected]>
> Sent: Friday, January 31, 2003 6:08 PM
> Subject: [TheForge] Air hammer return stroke
> 
> 
> 
>>So I'm still working on a self contained air hammer, although my
>>question applies to other hammers as well.
>>
>>When the ram is on the return, headed upward, it reaches a hard stop so
>>that the air cylinder doesn't bung itself up. I'm trying to figure how
>>to cushion the hard stop.
>>
>>A spring seems like a good idea. Unfortunately, there is quite a bit of
>>energy to absorb. If I did it right, I could do it with a stack of
>>Belleville spring discs. This would run about $50 buying them from MSC.
>>I sized them based on stopping the hammer in less than 1" travel (which
>>makes for a lot of spring washers). The rod on the cylinder that the
>>discs would go around is 1 1/8" diameter. A large coil spring would also
>>work, but I don't have a source for one.
>>
>>Any other suggestions out there?
>>
>>Thanks,
>>Steve Smith
>>
>>_______________________________________________
>>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
> ___________
> 
> 
> 