Blades and Bushlore

Knife and Tool Discussion => Making Knives and Sheaths => Topic started by: PetrifiedWood on November 10, 2017, 09:58:16 AM

Title: DIY arc furnace, requires welder, lantern battery and fire brick.
Post by: PetrifiedWood on November 10, 2017, 09:58:16 AM
Someone pointed me to this neat video. It would be great for casting your own pommels.

https://www.youtube.com/watch?v=VTzKIs19eZE
Title: Re: DIY arc furnace, requires welder, lantern battery and fire brick.
Post by: wolfy on November 10, 2017, 10:31:07 AM
Pretty neat! :thumbsup: .......and finally, a great reason to buy Chinese 'vise grips' ;D
Title: Re: DIY arc furnace, requires welder, lantern battery and fire brick.
Post by: wsdstan on November 10, 2017, 10:39:24 AM
Interesting but probably not for folks who have a pacemaker. 
Title: Re: DIY arc furnace, requires welder, lantern battery and fire brick.
Post by: 1066vik on November 10, 2017, 12:40:58 PM
that looks fun - I wonder if you could use the microwave transformers to power an induction furnace as well.
Title: Re: DIY arc furnace, requires welder, lantern battery and fire brick.
Post by: xj35s on November 10, 2017, 02:03:51 PM
This is a micro version of the very process Nucor uses to melt steel. Nucor is a large rebar and flat stock steel producer in Auburn NY. They use the same amount of electricity to melt a single pot as the entire city uses in one full day. They use tungsten rods.

The king has a lot of cool videos. As does KipKay.
Title: Re: DIY arc furnace, requires welder, lantern battery and fire brick.
Post by: xj35s on November 11, 2017, 11:35:23 AM
Would you use the lost foam method for making the pommels?

I have a Ramsey 8,ooo lbs winch and the end cap is broken. It is aluminum and a little more than half is in one piece. I'd like to cast my own replacement as there is nothing available aftermarket.

The end cap keeps crud out of the armature and supports and end bearing. Any one here capable of making a reproduction for me ? I'll cover all shipping and your time/materials.
Title: Re: DIY arc furnace, requires welder, lantern battery and fire brick.
Post by: wolfy on November 11, 2017, 12:05:52 PM
Could you duplicate it on a lathe or is the design such that it needs to be a casting?
Title: Re: DIY arc furnace, requires welder, lantern battery and fire brick.
Post by: PetrifiedWood on November 15, 2017, 11:52:52 PM
I do know that with some materials like aluminum the parts change dimensionally after they cool. You have to make the mold bigger or smaller (can't remember which) by a certain percentage in order to get the correct final dimensions.

I figured for casting small parts out of brass or bronze or nickel silver or pewter you could use the lost wax method, which is probably similar to lost foam, but I will need to research lost foam because it's new to me.

Where I grew up there was a hardware store that had a rock and mineral/jeweler's supposed shop in it that had hundreds of wax rings you would use to cast your own in metal with all sorts of different designs, but I never got much past polishing rocks in a tumbler.