Dangers of down hill Mig welding.

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Thought id throw this on here. Today my task was to take one of our triple deck carts. It has channel on the side opposed to angle on the corners, which is favored by our crew. and a couple months ago one of our supervisors hit her elbow on one and had to take a week off and have therapy. So dad said we need to convert them over. Only got one done out 4 Today but I started grinding one of the welds down and after it became flush with the steel there was pretty much 0 penetration.Sent from my C811 4G using Tapatalk
Reply:Yep.No surprise.
Reply:Originally Posted by AKweldshopYep.No surprise.
Reply:At least fit up looks good
Reply:Originally Posted by wade23454At least fit up looks good
Reply:Hey,I say fusion is more important than penitration.I've welded 1/8 wall square tube, downhill with a hh210mvp maxed out.Good fit and move fast.Strong as hell.I have a pic, but it's home on my computer.John
Reply:Originally Posted by AKweldshopHey,I say fusion is more important than penitration.I've welded 1/8 wall square tube, downhill with a hh210mvp maxed out.Good fit and move fast.Strong as hell.I have a pic, but it's home on my computer.John
Reply:Originally Posted by swampwelder13Thought id throw this on here. Today my task was to take one of our triple deck carts. It has channel on the side opposed to angle on the corners, which is favored by our crew. and a couple months ago one of our supervisors hit her elbow on one and had to take a week off and have therapy. So dad said we need to convert them over. Only got one done out 4 Today but I started grinding one of the welds down and after it became flush with the steel there was pretty much 0 penetration.Sent from my C811 4G using Tapatalk
Reply:Originally Posted by docwelderi'm shocked. just shocked and appalled. not.
Reply:[QUOTE=swampwelder13;4316571]believe me ive done my share of downhill short circut.I should of taken a pic before I ground it down. it look like a mountain ridge. tall and lumpy with little fusion on either toes.If you do it like john said it would work out fine on that thin channel. I tend to go on the slower side though. I like to really just keep tracing the leading edge of the puddle and the weld come out really flat. Try it different things work for different people. However I don't mean to discourage or compare to vert up as its generally the best practice. 3/16 is about the thickest I will burn downhill with mig even then its always a judgement call on how structural it needs to be. Good luck on the overhauls but also try a few different methods "motions" of downhill. Just maybe not on this project. While some will scoff at it I think it is a practice that does have its place.
Reply:Try a preheat and open root.old Miller spectrum 625 Lincoln SP-135 T, CO2+0.025 wireMiller model 250 and WP-18V torchCraftsman 100amp AC/DC and WP-17V torchCentury 115-004 HF arc stabilizerHome made 4 transformer spot welderHome made alternator welder
Reply:If you can't weld it does not matter what way you go and why would it?Don't blame down and mig.
Reply:Passed open root 3/8" bend tests with downhill mig. Just have to set the machine right and don't stack steel too fast.Airco Ac/Dc 300 HeliwelderMillerMatic 200 (stolen)Miller Maxstar 150STLMiller AEAD200LE (welding and generating power) Hobart MIG
Reply:Originally Posted by mikecwikIf you can't weld it does not matter what way you go and why would it?Don't blame down and mig.
Reply:It really wouldn't matter much if that was welded vertical u or flat. There really is no where for the wld to go except right on the edge. If 1 of the pieces was cut shorter to allow for a corner to fill in would have made a big difference. Take an 1-8 inch thick grinding wheel and open the weld seam up and you will have a good fix.Miller xmt304,  Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.
Reply:Originally Posted by M J DIt really wouldn't matter much if that was welded vertical u or flat. There really is no where for the wld to go except right on the edge. If 1 of the pieces was cut shorter to allow for a corner to fill in would have made a big difference. Take an 1-8 inch thick grinding wheel and open the weld seam up and you will have a good fix.
Reply:swampwelder13Everyone is pointing a finger - but ignoring the smell.This is tantamount: to being upside-down, in the barrow pit, and on fire;According to: Lincoln's: The Procedure Handbook of Arc Welding.[today, in its 13th edition . . . with more than two million copies sold . . . ] Your weldment: is a text-book example of 'joint inadequacy'.A weld, cannot be a weld - without proper joinery - and there wasn't any.Plan? - no plan.   Prep first - weld later.OpusLast edited by OPUS FERRO; 06-20-2014 at 11:17 PM.
Reply:Originally Posted by OPUS FERROswampwelder13Everyone is pointing a finger - but ignoring the smell.This is tantamount: to being upside-down, in the barrow pit, and on fire;According to: Lincoln's: The Procedure Handbook of Arc Welding.[today, in its 13th edition . . . with more than two million copies sold . . . ] Your weldment: is a text-book example of 'joint inadequacy'.A weld, cannot be a weld - without proper joinery - and there wasn't any. Plan? - no plan.   Prep first - weld later. Opus
Reply:There are some people that can mess up no matter what process. A bad weld is a bad weld.Millermatic 252millermatic 175miller 300 Thunderboltlincoln ranger 250smith torcheslots of bfh'sIf it dont fit get a bigger hammer
Reply:Originally Posted by farmshopThere are some people that can mess up no matter what process. A bad weld is a bad weld.