The Shop > Metal Stuff

Sawed off cupola

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vtsteam:
Mayhem basically they are used for corking and uncorking your cupola!

The botting iron gets a plug of clay sand refractory mix ( a bot) and you push it into the tapping hole when melting iron. At a point when it is judged the iron is running and hot enough to be useful. Sealing it off allows it to begin collect behind the bot in the well.

The tapping bar has a chisel point on the end and is used to knock out the bot to let the iron out and down the spout into the waiting pre-heated pouring ladle. The spout is lined with refractory. The dam at the bottom of Rob's spout is there to hold the refractory in and something to pack it against. The actual channel for the metal would be above that.

I'll try to get some photos of the blower construction this evening. Can't now -- must work on legs for furnace. Rob is surging ahead......

vtsteam:
Okay, fan first.

Taking off the cover. Lots of nuts. You can see one of the ABEC 7 skate bearings. There are two.

The arbor was a piece of 5/16" drill rod. The arbor casing is a 3/4" pipe nipple. The pipe nipple was cleaned up on the outside on the lathe, and then bored to take the ball bearing races. With the nipple still in the chuck, the pipe flange was screwed onto one end and it was faced in the lathe. This made everything true and square to the arbor, and the bearings aligned true.

The fan casing was made of thin plate. The flare at the end was made of stovepipe and is very thin. I flame welded a lot of this as I didn't have a good enough arc welder to work with thin metal -- just a Lincoln tombstone buzzbox stick welder.

vtsteam:
The cover off. You can see the flare and a lotta ugly welds! didn't clean much up here, but didn't ever expect to show this and I was anxious to see the results of my experiment.

I'm no welder.  :palm:

dsquire:
VT

As long as you keep the air movin fast it won't have time to see if the welds are purty or not.  :lol: :lol: :lol:


It looks good enough for me and if your satisfied with it then that is all that matters. I enjoy following along with your build and with Rob Wilson as well. I don't care who get finished first because I know that you will both be winners.  :D :D

Cheers  :beer:

Don

vtsteam:
I stick welded pieces of threaded rod all around. To get them to align with the holes, I drilled the holes first, then threaded nuts onto the studs and placed thm in the holes. They were then welded in place.

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