Re: welding on a rim

Posted by T_Bone on May 01, 2006 at 16:48:54 from (4.240.90.155):

In Reply to: welding on a rim posted by Bud Sather in MT on May 01, 2006 at 09:50:39:

Hi Bud,

What I would do is to clean the area to be welded then tack weld the cracks about every 2", about 1/4" to 3/8" long, then take a cutting torch and start heating the crack area starting at the stem hole working your way to the end of the cracks. Work to apply a fairly even heat along the entire area about 1" wide or so. The pre-tacks hold the metal from off-setting when you heat it. I always tack weld about 20amps hotter than I weld at.

Want you want to end up in the heat zone is a very dull red color but you want the red to start at the stem hole and work towards the end of the cracks. This will stress relieve this area so it won't recrack latter on. A rose bud will apply too large of a heat zone.

Once your stress relieve, let the area air cool, then prep the cracks,"V" groove slightly, then weld from the stem hole outwards.

I like the idea about drilling a new hole. Great idea. To fill the old hole just clamp a piece of flat copper on the non weld side then fill the hole with weld then remove the Cu chill bar and flush weld if needed. A piece of scrap CU pipe flaten works well.

Finish grind the surface to suit your likes.

T_Bone

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