[TheForge] blown forge

[Peter Fels & Phoebe Palmer]

It's expensive air when a cheap , little squirrel cage blower will suffice.

On Sep 8, 2013, at 4:28 PM, William Bohl wrote:

I had trouble in the past getting good enough advantage from directing air
from a blower into my (single) burner.  I still could not get my forge hot
enough to weld.  Today I ran a test directing air from my air compressor
into the burner well behind the mig tip propane inlet.  The result was very
promising even with the limited control that the compressor's pressure
regulator gave me.  I started with the compressor's regulator set near zero
and slowly ramped up the pressure and watched the flame color.  I stopped at
around 25psi (with a long hose).  Next I want to pick up a valve and pipe
fittings and properly plumb an air inlet to the burner.  That should enable
me to fine tune the mixture and hopefully weld.  Any thoughts or cautions?

Bill

-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Dan Scheid
Sent: Wednesday, September 04, 2013 9:12 PM
To: 'Blacksmithing List Sponsored by ABANA'
Subject: Re: [TheForge] blown forge

Steve please do this is exactly where I was going. 
Dan


-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Steve Bloom
Sent: Wednesday, September 04, 2013 7:58 PM
To: Blacksmithing List Sponsored by ABANA
Subject: Re: [TheForge] blown forge

At 07:14 PM 9/4/2013, you wrote:

> I have a side draw burner venturi propane forge (used a tee for air
> intake) with time and tricks my forge gets to welding temps It is right 
> at the 2350 but I'm greedy . I want more heat 2600-3K  would be a dream 
> so I'm thinking of adapting these burners to blown .

My purpose built Damascus forge has two venturi burners -- 0.040" 
orifices with a useable range of 5 to 15 psi on LP.  Volume of the forge is
18" x about 4" x 4".  I added a small squirrel cage, a flex 3" dryer hose
and a box manifold that slips over the bells of the burners.  There is a
slide gate in the flex hose-manifold interface.  At full blow, the 3000 F
refractory starts to melt.  At half or less, welding heat for billets with
O1/L6/203E are easily reached at 10 psi.  The maximum output of the blower
is a slight breeze.

If anyone is interested, I can post a image of the rig on my website.

Steve

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-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3392 / Virus Database: 3222/6639 - Release Date: 09/04/13

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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3392 / Virus Database: 3211/6613 - Release Date: 08/27/13
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