[TheForge] Cylinder Size

Sat Jul 12 10:35:01 2003

I use the dual pilot setup and its great, hits hard, fast and is easily
adjustable on the fly. I think any type of "stroke completion sensor" might
be overkill, I often slide my roller valves when working or when putting a
piece under the hammer.

----- Original Message -----
From: "Chuck Robinson" <[email protected]>
To: <[email protected]>
Sent: 12 July, 2003 9:13 AM
Subject: Re: [TheForge] Cylinder Size

> One of the problems I've noticed is the relatively soft hit if the Kinyon
> style hammers.
>  I suspect the automatic reversing switch in the single pilot control is
> valve is the culprit, since the piston switches direction before the
hammer
> hits the billet. This also reduces dwell time of the hammer on the billet.
> A double pilot control valve will eliminate this problem but the bottom
> pilot valve must be adjusted for the billet thickness.
> Is there any brave soul out there who has played around with stroke
> completion sensors to maximize hammer dwell time and automatically adjust
> for stock thickness?
> Chuck
> ----- Original Message -----
> From: <[email protected]>
> To: <[email protected]>
> Sent: Friday, July 11, 2003 2:13 PM
> Subject: Re: [TheForge] Cylinder Size
>
>
> > If you go with a larger bore on the cylinder you would need to also have
> the ports on the cylinder and and the valve be as large as possible.The
> trick is the amount of air flow you can get through the system as fast as
> you can get.You can have a large bore cylinder with big ports but if the
> valve ports are small and have a low cv rating then it will not cycle that
> fast.I have a 2" bore cylinder on my 25lbr with 3/8" ports on both the
> valve(which also has a high cv rate)and cylinder.it will do 240 beats
> /minute before that I had the same style valve with 1/4" ports and a lower
> cv and could only get 180 beats/minute
> >
> > --
> > Bob
> > HotAnvil Forge
> > http://members.tripod.com/hotanvil_forge
> >
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