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Its been a while since I ran dual shield 3 and 4 G for certs. Today i was practicing 3G .045 on a Lincoln 600 at 30.5 voltsLN 25 PRO wire feed at 275 fpm .5/8th Plate 22.5 deg bevel and .25" root openingI feel really good about my root and stringers. I've been told that they're looking for 3 passes on the cover but I really only need to make 2 welds for a cover pass. Does anyone have tricks to get the cover passes a little smaller. I cant go faster on fear of burnthru. Attached ImagesI'm going to do the thing that God put Galen Beasley on this Earth to do:Have Salon quality hair and weld.Nothing like a good cup of coffee and the smell of 6010 burning in the morning. 971-204-3444 cell API ASME Structural NDT and Repair
Reply:At 275 fpm, I'd imagine the beads are quite large. 275 ipm might work better Sorry I don't have anything useful to add. I've ran some Esab 7100 at school and it ran like a dream except for some wormholes once in a while. I can't remember my numbers but for some reason this seems like a lot of volts for the wire speed?Also, why would they require you to do a 3 bead cap when you can do it in 2? This seems like a waste of wire and time unless it has something to do with the heat input.
Reply:What happened in the last pic... did you try to squeeze a third cap bead on there... looks like your over the allowable reenforcement, assuming this is d1.1.. can't quite tell from the pic though.
Reply:Originally Posted by mrussoWhat happened in the last pic... did you try to squeeze a third cap bead on there... looks like your over the allowable reenforcement, assuming this is d1.1.. can't quite tell from the pic though.
Reply:Originally Posted by JoshDAt 275 fpm, I'd imagine the beads are quite large. 275 ipm might work better Sorry I don't have anything useful to add. I've ran some Esab 7100 at school and it ran like a dream except for some wormholes once in a while. I can't remember my numbers but for some reason this seems like a lot of volts for the wire speed?Also, why would they require you to do a 3 bead cap when you can do it in 2? This seems like a waste of wire and time unless it has something to do with the heat input.
Reply:The photo posted is your 3G? On the 4G you might try pulling instead of pushing which should help you run a narrower bead and run a bit faster. On the 3G looks like you could tie-in the beads a bit tighter which although you might need to not fill the groove quite as much before putting your cover passes on. Hope it helps...these are things that have helped me get my beads "narrower" and keep the profile down.
Reply:They won't allow a weave for the cover pass?I think this is on 1/2 inch plate. Attached ImagesDont pay any attention to meIm just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Originally Posted by heelerguyThe photo posted is your 3G? On the 4G you might try pulling instead of pushing which should help you run a narrower bead and run a bit faster. On the 3G looks like you could tie-in the beads a bit tighter which although you might need to not fill the groove quite as much before putting your cover passes on. Hope it helps...these are things that have helped me get my beads "narrower" and keep the profile down.
Reply:nope they want stringer cover passes. I think its better to practice stringer beads. Its pretty easy to weave.I'm going to do the thing that God put Galen Beasley on this Earth to do:Have Salon quality hair and weld.Nothing like a good cup of coffee and the smell of 6010 burning in the morning. 971-204-3444 cell API ASME Structural NDT and Repair
Reply:Originally Posted by galencwiIts been a while since I ran dual shield 3 and 4 G for certs. Today i was practicing 3G .045 on a Lincoln 600 at 30.5 voltsLN 25 PRO wire feed at 275 fpm .5/8th Plate 22.5 deg bevel and .25" root openingI feel really good about my root and stringers. I've been told that they're looking for 3 passes on the cover but I really only need to make 2 welds for a cover pass. Does anyone have tricks to get the cover passes a little smaller. I cant go faster on fear of burnthru.
Reply:I agree 30volts is way to high. I run .045 esab dual shield 7100 at work everyday. 24 volts and around 240-300 ipm is the ticket for around 1/4''. For 3/8''- 1/2 around 25-26 volts and 300-380 ipm run wonderfull. I would knock your voltage down alittle.ShaneYa gotta spend money to make money!
Reply:I checked this morning and the machines are set up with .052 wire. The weld inspector said it was .045 when i first started. sorry for the mixup. I usually check for myself before i start welding to see what wire I'm running but I only get less than 3 hours a day to weld. Didnt want to waste a lot of time so i trusted him. Theres no marking on the outside of the spool and the contact tips were pretty black and worn from being used by so many guys in the shipyard. After you guys were told me thats too much voltage I knew something was off.I'm going to do the thing that God put Galen Beasley on this Earth to do:Have Salon quality hair and weld.Nothing like a good cup of coffee and the smell of 6010 burning in the morning. 971-204-3444 cell API ASME Structural NDT and Repair
Reply:For me going from .045 to a .052 E71 wire took a little getting used to.Now I've got the 3G down pretty good w the 3 cover passes as requested for shipbuilding certification. But the 4G cover passes is where im having a little trouble with the weld falling out. usually its from moving to fast and or not being able to see very well.i run the gun over my forearm upside down. pulling towards me w a slight oscillationi set the plate up so its eye level. and im running 32.5 volts at 275 ipm on a LN 25. first pic is 4G root goes in great no problem the fill passes are the same...no problem. but when i get to the cover thats when all the fireworks start. And yes I am letting it cool for at least 15 min.2nd and 3rd pics are the same plate 3G . Attached ImagesI'm going to do the thing that God put Galen Beasley on this Earth to do:Have Salon quality hair and weld.Nothing like a good cup of coffee and the smell of 6010 burning in the morning. 971-204-3444 cell API ASME Structural NDT and Repair
Reply:[QUOTE=first pic is 4G root goes in great no problem the fill passes are the same...no problem. but when i get to the cover thats when all the fireworks start. And yes I am letting it cool for at least 15 min..[/QUOTE]Hello galencmi Are you running straight CO2?32.5 volts seems high even for .052 wire. Filling in the bevel will work OK when you are set hot because you have a slight shoulder to weld into, but getting the wire to stick on the cover will be a nightmare. Try turning your machine down some
I would guess around 24.5 to 26.5 volts.Are you guys busy up there? We're burnin 7 days a week 30min south.Will
Reply:Yes 4 on 12 straight CO2 E 71-C .052 wire. btw where are you working at? you can shoot me a private message. Work is set to begin in a week. Not very busy. They are putting the ships in drydock now. I have tried turning the voltage way down it runs like S*&#! In overhead way to much spatter and slag dropping in my gun. Vertical the beads look too cold. Heres pics of yesterday. Overhead only. Root at and fill at 32.5 volts and cover at 32 voltsOn the cover I finally made a couple of good passes without burnthru and excessive bead.The cwi showed me to hold my gun at a slightly better angle. I dropped my elbow just a little bit so my gun pointed more up vs. pointing toward the rear of the plate. (I'm running my gun over my elbow and upside down) Then dragging towards me.My guess is I have been loosing my shielding gas and the weld has been dropping out. I also increased the speed.just slightly. The other thing ive been doing that increases visibility is putting the vent directly over my plate. NO MORE trying to weld in a fog! Attached ImagesI'm going to do the thing that God put Galen Beasley on this Earth to do:Have Salon quality hair and weld.Nothing like a good cup of coffee and the smell of 6010 burning in the morning. 971-204-3444 cell API ASME Structural NDT and Repair |
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发表于 2021-8-31 23:29:02