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Olds
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« Reply #15 on: February 23, 2016, 02:27:31 PM » |
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Thanks.
Forge is finished apart from sorting out a blower. Total cost £ 0.00 It's all from scrap or steel that I have had lying around for years.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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Olds
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« Reply #16 on: February 23, 2016, 02:29:05 PM » |
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Couldn't see much point in painting the centre.  As soon as I get a blower I shall fire it up and see if it's any good. |
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« Last Edit: February 23, 2016, 03:36:11 PM by Olds »
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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the coppersmith
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« Reply #17 on: February 23, 2016, 02:38:13 PM » |
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wife could donate the hairdryer??? Good looking piece of work, again  |
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Mendalot
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« Reply #18 on: February 23, 2016, 05:14:09 PM » |
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The ideal Chestnut roaster and it will keep the workshop nice and warm, a multi use bit of kit  |
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Precision Guesswork ......... What else do you need?
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Manky Monkey
Administrator
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Karma: 264
Posts: 55102
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« Reply #19 on: February 23, 2016, 07:47:01 PM » |
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So can you explain to the stoopid people ...O.K, me, just how it works Dave
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On the last freedom moped out of Nowhere City.
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Olds
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« Reply #20 on: February 23, 2016, 09:44:24 PM » |
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It's very much like an old fashioned open fire in a house except it's supercharged.
Instead of having a chimney creating a natural updraught pulling air through the coal to aid combustion, a blower (or bellows) forces much more air through the tube (tuyere) into the fire causing the coal (or charcoal or coke) to burn at a much faster rate. Typical temperature of an open fire is probably about 850 C. Enough to get steel to bright red, which is just about OK to work with but not for forge welding, takes ages to heat the work, which will cools quickly to a point where it's unworkable.
With an air blast forge, a temperature in excess of 1300 C should easily be achievable.
The blower will be attached to the side tube and the simple slide valve at the bottom of the tube arrangement, is there to fine adjust the amount of air the forced through the fire, or bled out the bottom.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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Manky Monkey
Administrator
Hero Member
Karma: 264
Posts: 55102
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« Reply #21 on: February 24, 2016, 05:53:30 PM » |
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Thank you. So do you need some sort of hood over it to contain the heat? Presumably the white base is fireproof tyles? -I ask the stoopid questions so others don't have to |
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On the last freedom moped out of Nowhere City.
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Olds
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« Reply #22 on: February 24, 2016, 06:42:16 PM » |
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 . Hood not required, unless you intend on using it inside the workshop, in which case a hood with a chimney to the ouside is needed if you dont want to die. I have an unused chimney in the house, but I can't see the wife allowing me to put the forge in the kitchen ! Seeing as my workshop/garage is integral with the house, I think it safest if the forge stays outside. Though a small carport style shelter (open on three sides) might be feasible. The white base sections are cut from a sheet of 12mm water and heat resistant concrete board. I've used this before as heat shield when using the propane torch and it seem to be OK. If it doesn't last, I may have to get some refractory cement. The idea of using the MGB disc is that the cast iron is resistant to heat and easy to replace if required. The very hot zone should be limited to within the disc area. Have sorted a variable speed blower which should arrive Friday and yes I had to buy one,  so this project wasn't quite zero cost, but if it all works, £26 is't bad. 
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« Last Edit: February 24, 2016, 06:56:45 PM by Olds »
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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Bus Boy
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« Reply #23 on: February 24, 2016, 06:53:45 PM » |
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Cracking job there Olds.......so does this mean your now a master forger |
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I never wanted to be normal anyways!
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Olds
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« Reply #24 on: February 24, 2016, 06:58:45 PM » |
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Only the wifes signature.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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Olds
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« Reply #25 on: February 25, 2016, 05:12:52 PM » |
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Had a special delivery today by a very special postie. Despite it being his day off !  Thanks a lot MM  Blower for the forge. Jeez it's powerful. Lucky that it has a built in speed control. Will try to get it fired tomorrow (dependant on weather). |
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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Bus Boy
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« Reply #26 on: February 25, 2016, 05:30:13 PM » |
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Was it intended as a leaf blower originally ?
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I never wanted to be normal anyways!
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Olds
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« Reply #27 on: February 25, 2016, 08:32:45 PM » |
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Marketed as an air blower. The nozzle would be a bit short for a leaf blower and it's only 550 watts but it is a bit big for what I need. Still better to have a big fan not working hard, than a small one unable to achieve the airflow needed. I can always bleed off more air if the slowest speed is too much.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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hunter
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« Reply #28 on: February 25, 2016, 09:20:02 PM » |
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Looking good olds,
Now fire her up and get to work.
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I
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Bus Boy
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« Reply #29 on: February 25, 2016, 09:52:11 PM » |
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All round to Olds at the weekend for a Barbie ? |
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I never wanted to be normal anyways!
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