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I'm building a smoker, and I welded the hinges on this afternoon. I'm not particularly happy with the quality of my welds, and I was hoping to get some feedback from the more experienced members.Background info: the pipe is 3/8", the hinges appear to be made of 1/4" material. Yes, the pipe is rusty, but I wire-brushed the weldment site thoroughly (knotted wheel on a handheld grinder). MM252, .030 ER70S6, 24.3V/500ipm (recommended setting), 25CFH of C25.The pictures:Hobart cutting/welding torch.MM252, and nothing else. My first welder. Buy once, cry once....but I really would like a nice 50/60A circuit to run it at full strength.A bunch of ideas, and not enough time and money to bring them to life.
Reply:A couple more:Hobart cutting/welding torch.MM252, and nothing else. My first welder. Buy once, cry once....but I really would like a nice 50/60A circuit to run it at full strength.A bunch of ideas, and not enough time and money to bring them to life.
Reply:You need bigger wire. If I'm not mistaken, that setting you're using is for 1/4" correct? I would get some .035 or .045 wire and try again, with the machine set to 3/8". Focus most of the heat on the thicker base metal and just wash to the puddle up onto the thinner hinge material.
Reply:The settings were for .030 on 3/8". I tried to keep the heat on the base, but I have very little experience, so I was using about all of the attention I had just keeping an eye on the puddle.Hobart cutting/welding torch.MM252, and nothing else. My first welder. Buy once, cry once....but I really would like a nice 50/60A circuit to run it at full strength.A bunch of ideas, and not enough time and money to bring them to life.
Reply:Look at it this way, now you get to practice your grinding technique. Dont pay any attention to meIm just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Oh, I assure you, I have my grinding down pat. Lots of practice. Hobart cutting/welding torch.MM252, and nothing else. My first welder. Buy once, cry once....but I really would like a nice 50/60A circuit to run it at full strength.A bunch of ideas, and not enough time and money to bring them to life.
Reply:Yeah, Im an expert grinder, and rookie welder. Dont pay any attention to meIm just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Well since you have smaller wire you may have to do multiple passesSent from my iPhone using Tapatalk
Reply:With .35 wire I set my machine to 18.8 @ 250 fps Sent from my iPhone using Tapatalk
Reply:@ OkieDave - see post #6, http://weldingweb.com/vbb/showthread.php...r-252-settingsYou're overdriving (saturating) .030" wire at the settings you posted. You should also rip a few test samples (fillets) of 3/8" against 1/4" thicknesses to dial in your settings BEFORE you burn-in on the actual product (hinges). The undercut in the hinge shows you favored the top plane, versus the thicker pipe surface as others stated.Last edited by ManoKai; 07-05-2015 at 07:37 PM."Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:Looks a little hot tooSent from my iPhone using Tapatalk
Reply:Here is a fillet weld on 3/8 thick material. Made with Lincolns .030 L-56 Mig wire. 29-volts. 224-amps. Attached ImagesDont pay any attention to meIm just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:This may help? http://www.thefabricator.com/article...metal-porosity
Reply:Originally Posted by ManoKai@ OkieDave - see post #6, http://weldingweb.com/vbb/showthread.php...r-252-settingsYou're overdriving (saturating) .030" wire at the settings you posted. You should also rip a few test samples (fillets) of 3/8" against 1/4" thicknesses to dial in your settings BEFORE you burn-in on the actual product (hinges). The undercut in the hinge shows you favored the top plane, versus the thicker pipe surface as others stated.
Reply:@ CEP - spray xfer, check? WFS and shielding gas? Apples to apples for assistance to OP. OP 's using short circuit with C25. Not a 90/10, 95/5, or 98/2. Last edited by ManoKai; 07-05-2015 at 08:10 PM."Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:Originally Posted by ManoKai@ CEP - spray xfer, check? WFS and shielding gas? Apples to apples for assistance to OP. OP 's using short circuit with C25. Not a 90/10, 95/5, or 98/2.
Reply:@ OkieDave - based on your aural indicators you were most likely into globular xfer. C25 no es beuno for glob/spray transfer. Empirical testing and available tech refs show .030" wire can handle 225-240A at a max WFS of 680-700ipm. You should pause and return to basics. Weld laps of 3/8" on 1/4" to dial in your V/WFS settings and optimize your travel speed and gun angle. You should be able to make .030" wire work; however, you'll need multi-pass. .035" wire is preferred for your material thicknesses. Lots of cats use .030" up to ~ 3/16" thickness then opt for .035". Not a hard n fast rule, just an observation."Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:Wire brushing isn't going to get that metal nearly clean enough. It has to be cleaned with a grinder down to shiny metal.That will make a world of difference.Rusty (oxidized) metal usually results in poor fusion and porosity, when mig welded.Rich
Reply:@ CEP - nice! Impressive weld and deep/deep root fusion. That Lincoln rig is the bees knees. "Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:Originally Posted by ManoKaiThat Lincoln rig is the bees knees.
Reply:Originally Posted by steelsurgeonWire brushing isn't going to get that metal nearly clean enough. It has to be cleaned with a grinder down to shiny metal.That will make a world of difference.Rusty (oxidized) metal usually results in poor fusion and porosity, when mig welded.Rich
Reply:Would a sandblaster be sufficient?Hobart cutting/welding torch.MM252, and nothing else. My first welder. Buy once, cry once....but I really would like a nice 50/60A circuit to run it at full strength.A bunch of ideas, and not enough time and money to bring them to life.
Reply:What's wrong with a grinder? I'm not too fond of welding on blasted steel.
Reply:The amount of area to be prepared, the fact that I'll need to blast it anyway for painting, and the fact that some of the work will be inside the 24" barrel (welding in a reverse-flow plate, among other things).Just wondering if I could save some effort there. If not, a grinder it is.Hobart cutting/welding torch.MM252, and nothing else. My first welder. Buy once, cry once....but I really would like a nice 50/60A circuit to run it at full strength.A bunch of ideas, and not enough time and money to bring them to life.
Reply:Originally Posted by OkieDaveWould a sandblaster be sufficient?Originally Posted by MinnesotaDaveI blast small parts before tig welding pretty often - works nice For other stuff I just grind or use flap wheel....ok, I'll admit it, I'm lazy and blast whenever I can
Reply:I dunno, I guess I'm biased cause they had us welding TIG roots on blasted pipe fittings at work with no other prep at all and I had nine kinds of hell with it. It probably will be fine for MIG on a smoker.
Reply:Originally Posted by tigonridgeIsnt sandblasting pretty messy? Would grinder be faster?
Reply:What media do you use Dave?
Reply:Moto - currently using Black Blast from menards.Cost a little more than sand, but no silica so it's safer for my lungs - and with COPD it pays to be cautious.My indoor blast cabinet filter bag is not rated to capture silica dust, so I use Black Blast in it too.Also, it cuts faster than sand.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:I have had guys want me to weld on some piece of equipment that has been sitting unused for years and has had between 3/16 and 1/4 inch of rust Air chisel off the thick stuff and blast the rest and that's just so i can assess what really needs to be done sometimesBacked my CATMA over your CARMA oops clusmy me What would SATAN do ?? Miller Trailblazer 302 AirPakMiller Digital Elite Optrel Welding HatArcair K4000Suitcase 12RC / 12 VSHypertherm PM-45Rage 3 sawRusty old Truck
Reply:Looks to me like a technique problem. watch the vids on weldingtipsandtricks.com and practice on scrap before welding on any project. Also like others have said, up the wire size to 0.035" min. I'd consider spray transfer but for that application short circuit is probably fine. I'd probably lightly grind the surface clean tooLast edited by Jieve; 07-11-2015 at 05:39 AM.
Reply:Okie how's your vision looks like many instances of stop starts in addition to technique Sent from my SGH-I747M using Tapatalk |
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发表于 2021-8-31 22:33:02