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Post by Deleted on Oct 12, 2007 4:39:45 GMT
i picked up some bar stock to lengthen the tang on a cheapo sword, while i was there i briefly looked through a book on welding.
it said to avoid butt joints.
any thing except a butt joint will make it imposible to put the habaki and tsuba back on.
what is reccomended?
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Post by grahamts on Oct 12, 2007 9:05:46 GMT
I would guess that they mean straight butt joints that have not been ground back to allow good penetration of the weld. If you just butt 2 pieces of steel, both cut at right angles then the weld tends to go over the joint and not into it. If you grind back the edges of the joint by taking the corners off then the weld starts within the joint up to the surface of the metal I hope that is reasonably clear? It is not the strongest way of joining 2 pieces of metal but is should be OK, you need a response from Dan (Wild Forge) as he has done exactly what you want to do.
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Post by Dan Davis on Oct 12, 2007 11:47:48 GMT
Nope, that pretty well sums it up. You need to bevel one piece or the other, make sure you weld the joint straight and even, and make sure you get good penetration. When I weld a flat joint (butt joint) I usually grind one side of one piece of metal halfway down or to the thickness of the welder's joint penetration: i.e. if I can reasonably expect 1/8" penetration using a particular welding rod and I am welding a 3/8" piece of steel, then I cut a bevel 1/4" deep and 1/4" long on one side of one of the pieces, leaving the other piece square to that one. When I weld, I start at the base of the bevel and weld across the joint. This gives me a solid melt through to the other side. I then run a filler bead behind that first bead, let it cool, and then run a second stringer bead above the first one. I let all of that cool, and then run a set of 3 filler beads across the top. Once all of that cools I flip the pieces over and run a surface stringer across the joint on the back side. This process gives me full penetration and a solid weld base. Follow the same advice I gave here /index.cgi?board=swordmaking&action=display&thread=1190486697 as a general rule set.
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Post by Deleted on Oct 12, 2007 12:16:45 GMT
thanks dan, have some karma
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