|
|
I've had a very disappointing day trying to mig 22 guage (.030 thick) stainless. Some of it is a little thicker like .052, whatever guage that may be. I have tons of it to do if I can do it. I'm talking hundreds of feet of sheet about .052 lapped and fillet to matrial about .095 stainless angle iron. I'm practicing at home so I can hopefully take the job on and not screw it up. I cant find any perameters or liertature w/ welding feeds and settings on the web for what I'm doing. I'd appreciate if some of you could point me in the right direction or give me a link. Today, I had some .030 316 in an ln 25 hooked up to my 350 xmt. I tried between 15 -18v and feeds around a 100 +. I honestly think the 350 xmt is a piece of crap. I've always regretted buying it. Can I please get some advice.
Reply:Trying stitching/pulsing that. That's pretty thin to run a bead on if that's what your doing.Arcon Workhorse 300MSPowcon 400SMTPowcon SM400 x 2Powcon SM3001968 SA200 Redface1978 SA250 DieselMiller Super 32P FeederPre 1927 American 14" High Duty LatheK&T Milwaukee 2H Horizontal MillBryan
Reply:I'm w/ you on that part. I figured I'd have to stich it, I don't have the pulse option on it. My problem is I cant really get a bead started. And when I do get a bead started, It don't last long before it starts spitting and spatting and making a mess. And during this whole time I'm doing everything the same. There is no rhyme or reason why it worked or didn't work, because I didn't change anything. And when I do get a short bead to go, its got that appearance that you got the stainless to hot.
Reply:I want to find some written paremeters that go down that low, so I can try to narrow down the problem. I've got harris tig paremeters for alum, but cant find gmaw for stainless. Lincolns 316 claims to go down to 22 ga. but they leave the settings wire speed and current settings blank on there setting sheet at about 18 ga.
Reply:I'm using tri mix, and practicing on a couple unknown stainlesses, but probally 308 or something. I'm hoping I'm wrong, but I think its the machine. I had to weld some worn out sheet metal in the back of some guys bottom dumps one time. I was using .035 nr 211. Normally I'd use my Lincoln mini-migs for something like that, but there was to much continuous welding and the duty cycle would have been a problem. So xmt and ln 25 it was, I had a bear of a time getting things tuned in. I was cussing I'd never buy another inverter again.
Reply:Don't know if you found this already, but it's a pretty good write up in MIG and thin stainless - http://www.lincolnelectric.com/en-us...t-welders.aspxMiller Dynasty 200DXMiller 252 Miller 250xMiller Syncrowave 250Miller AEAD200 LegendMiller 375 Xtreme plasmaLincoln WeldPak 100Victor O/A
Reply:AKmud, that's really a good article. I hadn't seen it. It helped me some, and it was in simple plain language.
Reply:OK, well, does anyone at work who migs thin stainless say what feed and current or machine they use on what thickness??
Reply:Originally Posted by 123weldI've had a very disappointing day trying to mig 22 guage (.030 thick) stainless. Some of it is a little thicker like .052, whatever guage that may be. I have tons of it to do if I can do it. I'm talking hundreds of feet of sheet about .052 lapped and fillet to matrial about .095 stainless angle iron. I'm practicing at home so I can hopefully take the job on and not screw it up. I cant find any perameters or liertature w/ welding feeds and settings on the web for what I'm doing. I'd appreciate if some of you could point me in the right direction or give me a link. Today, I had some .030 316 in an ln 25 hooked up to my 350 xmt. I tried between 15 -18v and feeds around a 100 +. I honestly think the 350 xmt is a piece of crap. I've always regretted buying it. Can I please get some advice.
Reply:I used to do macaw cages in stainless and the pans were 18 ga 304. Used 98/2. 2 being CO2.Cant recall the settings. That was in '84-'86 or so.MM200 with 308LSi in .023. Low 2 and 55 wire I think ???The welds were only 2", in the corners and pull handles and the box tube was 1"box 16ga so this info really wont help.I can tell you the wire-gas combo is a winner.Bubble gumTooth pixDuct tapeBlack glueGBMF hammerScrew gun --bad battery (see above)
Reply:I gave up on the xmt 350. I switched over to my sp 175, and got dialed in, in 5 min. I found that .03 was to much though. I went and got a Blue demon 10lb size plastic spool that comes w/ 2lbs of .023 308 on it for around 20 dollars or less.
Reply:123weldJust one of those things I was pondering late at night, you were attempting to weld 0.030 material with 0.030 wire. Not in any way questioning your welding ability, but for me, that would be a REAL challenge. I'd be reluctant to blame the equipment, and find it easy to blame the electrode/work ratio.On this end with my stainless project, nothing but frustration. I would have preferred 0.023 wire, but LWS only had 0.030, so thats what I used. Working with 0.053 material, if I keep the settings low and move quickly, it gives "OK" results some of the time. But as often as not it would run for an inch or so, then burn back into the tip. Blew out the gun and liner, replaced tip twice, checked roller tension, etc etc. No real improvement. I had replaced the liner not too long ago, didnt think that was a problem. But the stainless wire was a little "sticky" at times, an obvious potential problem. Then realized my last project with the MM involved running about 20 pounds of hardfacing wire. The stuff was "gritty" as heck, you could run it through your fingers and leave a significant powder trail. Now thinking I must have filled the liner with residue from the hardfacing wire. Will install a new liner tomorrow and see if it helps the feeding. This little project has absorbed a lot of time and energy. Off topic, but I picked up an XMT350 about a year ago, its about as amazing as anything I have ever used. Vertical up stick with a healthy dose of "dig", actually made me look like I knew what I was doing. And it runs the Super S32P like it was made for it. --But--, I havent tried it with 030 stainless, and guessing it would be a recipie for failure. Light material, light wire, industrial grade power source and feeder, tough combination. My thought is to use the smallest machine and smallest possible wire.Hobbyist - At what point is a "hobby" out-of-control?
Reply:I've also found that small machines do better on thin stuff.
Reply:My small HTP 120 mig machine has a 4 position switch and the number 1 is not low enough for thinner sheet steel. Granted, I can adjust wire/ nozzle stickout, feed, speed etc, sometimes its nice to have a piece of copper or brass as a backer to keep weld from falling out into back of the joint.
Reply:Btw, miller has an app for smartphones that gives you general parameters. You choose the process, material, and thickness. If you have a smartphone, just look it up in your app store.
Reply:@ 123weld - XMT350. Sucks? ConFused. My XMT304 CC/CV runs GMAW, FCAW-S, FCAW-G, and SMAW like a dream. For MIG, linked to a Miller S32P Suitcase or 74DX Feeder, she rules. Based on the thickness of your parent material, would have started the test runs/burns using .023 wire and 90/8/2 shielding. I-CAR, Miller recommend .023 wire for fusing 18gauge and below thicknesses. Will .030 work? It depends. Wouldn't baseline .030 for this application. Trial and error .023 until she was perfect."Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:Originally Posted by 123weldAKmud, that's really a good article. I hadn't seen it. It helped me some, and it was in simple plain language. |
|
发表于 2021-8-31 23:13:30