Re: mig welders
[Re: can.al]
#2025985
03/06/16 09:18 PM
03/06/16 09:18 PM
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Joined: Jan 2003
Posts: 4,270 Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,270
Morrow, OH
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You need gas shielding for sure.
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: mig welders
[Re: can.al]
#2025987
03/06/16 09:24 PM
03/06/16 09:24 PM
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Joined: Mar 2003
Posts: 4,848 Memphis
HemiRick
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master
Joined: Mar 2003
Posts: 4,848
Memphis
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To weld sheet metal you need to run .023 wire and use shielding gas generally 75 carbon dioxide/25 argon. Having a welder with a infinite dial as opposed to discrete settings is also nice.
Take care, Rick 68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
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Re: mig welders
[Re: HemiRick]
#2026271
03/07/16 02:11 AM
03/07/16 02:11 AM
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Joined: Jun 2005
Posts: 6,257 gulfport, ms, west mi
rowin4
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master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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flux core wire produces a lot of spatter, might be OK for floor patching but not for outer panel work
it's ok to butt heads, just don't do it with a butthead
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Re: mig welders
[Re: rowin4]
#2026286
03/07/16 02:49 AM
03/07/16 02:49 AM
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Joined: Apr 2015
Posts: 114 Oregon
Wagonman1967
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member
Joined: Apr 2015
Posts: 114
Oregon
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[quote=rowin4]flux core wire produces a lot of spatter, might be OK for floor patching but not for outer panel work [/What Rowin Saidquote]
1968 Bronze Metalic Road Runner !967 Malibu Wagon Original 4sd w/air 2001 Dodge Ram 4wd 1985 GMC K1500 4in lift 1993 Honda Civic W 350k Beater 2003 Honda VTX 1800 Bagger
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Re: mig welders
[Re: Stanton]
#2026504
03/07/16 03:10 PM
03/07/16 03:10 PM
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Joined: Dec 2007
Posts: 18,157 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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The problem with flux core for bodywork is that you want to put a patch on completely with tacks - no continuous beads. So the flux core will leave a flux coating on each bead which would have to be thoroughly cleaned before you could put one next to it. It would take forever to put on even a small patch !!
.023 is ok for for tacks but for plug welding I prefer .030 (personal preference)
You definitely want to use the argon/co2 mix.
Look into the wire - apparently there is a wire that yields a softer bead, making grinding much easier and therefore generating less heat. I haven't found it yet but haven't looked that hard either! I agree with most of your statement, however my personal preference is .035 wire, and just Argon gas, as far as grinding the welds, I find a 36 grit Zirconia flap wheel the best, but change often for a true flat cut
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Re: mig welders
[Re: can.al]
#2027044
03/08/16 04:06 AM
03/08/16 04:06 AM
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Joined: Jan 2011
Posts: 4,785 Utah and Alaska
astjp2
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master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
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Argon runs hotter than 75/25 gas
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: mig welders
[Re: Stanton]
#2027149
03/08/16 12:44 PM
03/08/16 12:44 PM
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Joined: Dec 2007
Posts: 18,157 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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The problem with flap wheels is they'll ride over the bead and take metal off the panel on either side. A solid grinding disk will only remove metal where you touch it. Again, personal preference. I use to be of the "old school" when it came to grinding welds, using a hard solid wheel, but flap discs have evolved quite a bit in the last decade or so, there's angled discs, flat discs, even discs just for doing 90 degree joints, "see thru" flap discs so you can see exactly what your grinding under the disc as it's cutting, "cool run" flap discs, etc, etc, the down side is price, most are $10-$20 each and don't last long, so most stick with the $3-$4 hard grinding wheels/disc, once you use a proper flap wheel for cutting down and finishing a weld, you'll never use a black hard disc ever again, the only time I find myself needing a hard disc is to cut down a grotesque weld one of the new guys welding at the shop may have done, just so I don't waste a good flap wheel....but to each his/her own, as we learn and like different styles/techniques, but it's always good to hear/see others experiences Mike
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