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plug welds

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发表于 2021-9-1 01:00:36 | 显示全部楼层 |阅读模式
hi everybody, first post herei need to make several plug welds to join 1/8 x 1 1/4 straps with SMAW, i have not done it before.any help would be appreciated (hole diam, electrode type, technique, etc.)thanks in advancegreat site here!
Reply:I do plug type welds from time to time with GMAW and FCAW and they work great. They are pretty easy most of the time but do require a bit of thought ahead of time tho. There are some variables each time and those variables will dictate the hole size. Those variables are the fill rate and slag deposit of whatever ever set up you are running at the time. Right, don't change set ups, use whatever set up you ae running for the project in general to do the plug welds. Take a look at your fill and slag from the existing welds and go from there. Too small a hole and the fill rate will overwhelm quickly and you won't be able to float the flux and slag out. There will be some cold lap. Too large a hole and you'll have to come around over weld bead that has already set up with slag and crud on it. Or you'll have to let it cool, clean it and go back for a fill pass. You want to be able to pull away from a nice orange dancing puddle that will look like a shiny button when you're done.1/8th inch will be a pretty shallow hole so that will make it fairly forgiving. Let's say you're running a 3/32nds rod I'd try about a 1/2 to 5/8ths hole. That's a wild guess cuzz it's been some time since I've run a stick and there's a big diff in flux between a 6010 and 7018. Start in the hole just off center, run to the base of the rim, around the rim quick and back to the center.
Reply:countersink the holes and fill them up.  Same thing as chamfering a butt weld.
Reply:countersink the holes and fill them up.  Same thing as chamfering a butt weld.  This way you will fuse the metal from inside out.
Reply:thanks guys!what amp setting would you suggest for 3/32 e6013 and 6011?
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