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Ok here we go again, I hope that these pictures show more detail, so that I can receive some constructive criticism. This is a corner to an aluminum frame, all welds are on 1/8th inch aluminum, with a millermatic 350p, and python gun. The structural welds are on the outside of the box, and I am including a pic of one of them. All of the welds on the corner piece are strictly to fill gaps, many welds are ground flush and all welds are powder coated (super thick powder coat). Please remember that i work in a production shop, so I have to run run run, so taking my time and being perfect is hardly an option and there are more than 130 welds per frame. I am currently in school for welding, though my classroom knowledge of aluminum welding is terribly lacking. Thank you for looking. Attached Images
Reply:Not to badWill Supports Autism Awareness My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:that looks much better looks like you do have a little cavitation at the termination point i would pause a little longer also those whips still look a little loose but all in all still looks alot better than the one before also keep in mind that what your doing is a balancing act with the filler welds if your bead is to high it takes the grinders longer if your bead is concave in any areas it will show when they grind it , i also used to work production i built semi trailers mostly for the oil fields and some military contracts with some where in the neighbor hood of 1000 welds per trailer quite a few were multi pass and on some the deck plate was welded solid meaning 60 feet of weld just on one item we were expected to kick one out every 15-17 hours with a two man team.....theres allways time for a good weld.
Reply:looks good, especially working under strict time and rushing
Reply:Originally Posted by texasrednekthat looks much better looks like you do have a little cavitation at the termination point i would pause a little longer also those whips still look a little loose but all in all still looks alot better than the one before also keep in mind that what your doing is a balancing act with the filler welds if your bead is to high it takes the grinders longer if your bead is concave in any areas it will show when they grind it , i also used to work production i built semi trailers mostly for the oil fields and some military contracts with some where in the neighbor hood of 1000 welds per trailer quite a few were multi pass and on some the deck plate was welded solid meaning 60 feet of weld just on one item we were expected to kick one out every 15-17 hours with a two man team.....theres allways time for a good weld.
Reply:looks great to me. i also aluminum mig weld (building dump trailers for semi's.)
Reply:in the shop I worked in there was a strict rule to never weld downhill.Dynasty 200DXPassport plus w/ spoolmate 100victor 315c oxy/(act and prop)Miller digital elitemilwaukee power tools
Reply:Mig like tig part 2??Miller Dynasty 200DXMiller Spectrum 250DMiller Millermatic 200Bunch of old blue dinosaurs....
Reply:4th and 5th pic seem to show craters between the ripples.I assume you are whipping forward and back. If so, tighten it up would likely fix it.Nothing wrong with a straight pull.Dave J.Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:Welding downhill on aluminum????
Reply:Originally Posted by mstyerWelding downhill on aluminum????
Reply:it is very easy to get a good looking weld with zero structural integrity. Originally Posted by GambleWhy???
Reply:On mig downhill in general or just on aluminum?Torchmate 2x2 CNC with Flashcut CNC controlsHypertherm Powermax45 Esab ET220i Razorweld 195 MigRazorweld 200ac/dc TigTormach 770, Tormach xstechRazorweld, Vipercut/Vipermig, SSC Foot Pedal Dealer
Reply:On mild steel with Mig I won't weld down hill on anything thicker than 10-GA.Dont pay any attention to meIm just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:It's not that it is not possible, but rather that it is easy to get a good looking weld with no penetration.Dynasty 200DXPassport plus w/ spoolmate 100victor 315c oxy/(act and prop)Miller digital elitemilwaukee power tools
Reply:those welds look great. welding downhand with al wire is done all the time, your work being an example. the only weld that looks like a straight downhand al weld is the short corner weld on the upper left.
Reply:Originally Posted by jmoskeeI find that by the time I get to the bottom of the weld, the base metal is so hot that it is nearly impossible to keep a convex finish, so I usually spot the bottom before I make the run, or spot it after. I could turn down the wire speed but that makes the start look cold and raised too high. I am supposed to get at least 10 of these frames a day, though I usually get 13 or so. I will probably slow down a touch and get my whips a little closer. Thank you for your help and knowledge.
Reply:To those who say it's taboo to mig aluminum downhill. I have to ask just how much experience do you have on the subject? Have you done a lot of mig aluminum, what kind of tests have you done to back up your advice?I'll agree that downhill short circuit gmaw on steel is typically a terrible idea but even that depends on the joint configuration. Short circuit steel and pulse aluminum are two totally different situations.
Reply:X2 with Hertz. He stated material thickness is 1/8 . Downhill not a problem on something that thin. Sure your not going to want to do it on material much thicker. Nice looking welds man.
Reply:They teach us @ my school to run GMAW aluminum downhill. They also bend test most of them to make sure we are getting under the puddle enough to get good penetration while doing so. I've only had luck doing vertical up aluminum on thicker material (3/16) in my case. |
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发表于 2021-8-31 22:43:15