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Mig welding and blowing holes #1211756 04/07/12 05:22 PM 04/07/12 05:22 PM
Joined: Sep 2011 Posts: 339 California M moparbroz OP enthusiast
moparbroz OP enthusiast M Joined: Sep 2011 Posts: 339 California	I am burning holes through the original sheet metal on my '72 Satellite. Is the wire speed not fast enough? It's a Lincoln flux wire unit with a hi-Lo setting only. Hebrews 11:1

Re: Mig welding and blowing holes [Re: moparbroz] #1211757 04/07/12 05:31 PM 04/07/12 05:31 PM
Joined: Nov 2005 Posts: 836 lancaster, new york macmic87 super stock
macmic87 super stock Joined: Nov 2005 Posts: 836 lancaster, new york	what size wire are you using? need something around .020"

Re: Mig welding and blowing holes [Re: macmic87] #1211758 04/07/12 05:46 PM 04/07/12 05:46 PM
Joined: Jul 2007 Posts: 1,682 Philadelphia R radar top fuel
radar top fuel R Joined: Jul 2007 Posts: 1,682 Philadelphia	I'm a pretty amateur welder but if you can't control the heat you'll have to match the speed up till it's right on some practice scraps (bead sinks in just right, bacon cooking sound). If the wire speed gets to high it will want to make tall welds with poor penetration that require lots of grinding, or even not melt in fast enough and push you off the puddle. If the LO setting is just too high for the metal thickness you might be able to get away with just not hitting it for very long(tiny tack welds). As always proper gaps and especially clean fresh steel showing are super important. For body work you often want a million tack welds anyway- keep moving around to keep the heat from warping your panels.

Re: Mig welding and blowing holes [Re: radar] #1211759 04/07/12 08:11 PM 04/07/12 08:11 PM
Joined: Sep 2011 Posts: 339 California M moparbroz OP enthusiast
moparbroz OP enthusiast M Joined: Sep 2011 Posts: 339 California	Awsome! Thank you so much! Quote: I'm a pretty amateur welder but if you can't control the heat you'll have to match the speed up till it's right on some practice scraps (bead sinks in just right, bacon cooking sound). If the wire speed gets to high it will want to make tall welds with poor penetration that require lots of grinding, or even not melt in fast enough and push you off the puddle. If the LO setting is just too high for the metal thickness you might be able to get away with just not hitting it for very long(tiny tack welds). As always proper gaps and especially clean fresh steel showing are super important. For body work you often want a million tack welds anyway- keep moving around to keep the heat from warping your panels. Hebrews 11:1

Re: Mig welding and blowing holes [Re: moparbroz] #1211760 04/07/12 09:34 PM 04/07/12 09:34 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton master
Clanton master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	i think if you put a thin sheet of copper behind the metal it will block the wire and let it buildup and it wont stick to the copper and it is removed when done.i hope someone can verify this. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Mig welding and blowing holes [Re: Clanton] #1211761 04/07/12 09:38 PM 04/07/12 09:38 PM
Joined: Jul 2008 Posts: 62 south jersey W welderboy member
welderboy member W Joined: Jul 2008 Posts: 62 south jersey	Better off with solid wire and shielding gas! You'll be much happier!!

Re: Mig welding and blowing holes [Re: welderboy] #1211762 04/07/12 09:43 PM 04/07/12 09:43 PM
Joined: May 2006 Posts: 2,046 ky. K kenworth_goose top fuel
kenworth_goose top fuel K Joined: May 2006 Posts: 2,046 ky.	The best weld would be with fluxcore wire and shielding gas. I was amazed at how good it works.

Re: Mig welding and blowing holes [Re: kenworth_goose] #1211763 04/07/12 09:47 PM 04/07/12 09:47 PM
Joined: Jul 2008 Posts: 62 south jersey W welderboy member
welderboy member W Joined: Jul 2008 Posts: 62 south jersey	Quote: The best weld would be with fluxcore wire and shielding gas. I was amazed at how good it works. Never heard of that - don't get it, but may be worth a try...

Re: Mig welding and blowing holes [Re: kenworth_goose] #1211764 04/07/12 10:16 PM 04/07/12 10:16 PM
Joined: Dec 2003 Posts: 22,696 Bitopia J jcc If you can't dazzle em with diamonds..
jcc If you can't dazzle em with diamonds.. J Joined: Dec 2003 Posts: 22,696 Bitopia	Quote: The best weld would be with fluxcore wire and shielding gas. I was amazed at how good it works. Yes I would be amazed, any second opinions on this method? And on the copper backup trick, it should work, bronze would also be a solution, but IMO, its just a bandaid until you get yourself and welder dialed in. Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.

Re: Mig welding and blowing holes [Re: moparbroz] #1211765 04/07/12 10:21 PM 04/07/12 10:21 PM
Joined: May 2008 Posts: 5,399 Aurora, Colorado 451Mopar master
451Mopar master Joined: May 2008 Posts: 5,399 Aurora, Colorado	Save the flux wire for exhaust and brackets, it's too thick for the sheet metal. I admit, I have welded sheet metal that way, but it's alot more difficult, and the flux core wire creates alot of spatter. Get the gas kit, and the smaller mig wire and you will have much better results welding the sheet metal.

Re: Mig welding and blowing holes [Re: 451Mopar] #1211766 04/07/12 10:27 PM 04/07/12 10:27 PM
Joined: May 2007 Posts: 1,443 Maryland D Dads426 pro stock
Dads426 pro stock D Joined: May 2007 Posts: 1,443 Maryland	Quote: Save the flux wire for exhaust and brackets, it's too thick for the sheet metal. I admit, I have welded sheet metal that way, but it's alot more difficult, and the flux core wire creates alot of spatter. Get the gas kit, and the smaller mig wire and you will have much better results welding the sheet metal. I built a trailer frame with flux core. Great for thicker metals, but switched to 0.024" wire and gas for sheet metal. I was just blowing holes in sheetmetal with flux core. 2012 422 Allstars NSS Champion 2013 422 Allstars NSS Champion 2014 422 Allstars NSS Champion

Re: Mig welding and blowing holes [Re: moparbroz] #1211767 04/08/12 12:07 PM 04/08/12 12:07 PM
Joined: Nov 2003 Posts: 5,048 Atlanta Indiana D Dave Watt master
Dave Watt master D Joined: Nov 2003 Posts: 5,048 Atlanta Indiana	Quote: I am burning holes through the original sheet metal on my '72 Satellite. Is the wire speed not fast enough? It's a Lincoln flux wire unit with a hi-Lo setting only. Sometimes there is too much gap between the panels. If that's the case you might need to lay the gun down horizontally with the panel versus perpendicular. This will make it easier to bridge the gap.

Re: Mig welding and blowing holes [Re: Dave Watt] #1211768 04/08/12 01:25 PM 04/08/12 01:25 PM
Joined: Oct 2005 Posts: 1,305 Lakewood, Colorado herkamer pro stock
herkamer pro stock Joined: Oct 2005 Posts: 1,305 Lakewood, Colorado	You can also use aluminum to back up the weld. I do this all the time and works just fine. Flux core is definitely not the first choice for sheet metal but it can be done. Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more

Re: Mig welding and blowing holes [Re: herkamer] #1211769 04/08/12 02:17 PM 04/08/12 02:17 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	Usually with sheet meatal you "sticth weld". Work around the joint with short beads, 1/4" or less in length. Back and forth until it is completly welded. It helps prevent blow through and also heat distortion.

Re: Mig welding and blowing holes [Re: ahy] #1211770 04/08/12 06:14 PM 04/08/12 06:14 PM
Joined: Aug 2010 Posts: 343 S.E.Mich D drew72 enthusiast
drew72 enthusiast D Joined: Aug 2010 Posts: 343 S.E.Mich	I agree that you would be better off with a gas conversion. In the mean time you should use heavier wire, seeing that you can't adjust the heat very well. The heavier wire will absorb some of the heat and help prevent burn through.

Re: Mig welding and blowing holes [Re: welderboy] #1211771 04/08/12 07:03 PM 04/08/12 07:03 PM
Joined: Sep 2011 Posts: 339 California M moparbroz OP enthusiast
moparbroz OP enthusiast M Joined: Sep 2011 Posts: 339 California	I know but not financially feasible right at the moment unfortunately. Quote: Better off with solid wire and shielding gas! You'll be much happier!! Hebrews 11:1

Re: Mig welding and blowing holes [Re: Dave Watt] #1211772 04/08/12 07:08 PM 04/08/12 07:08 PM
Joined: Sep 2011 Posts: 339 California M moparbroz OP enthusiast
moparbroz OP enthusiast M Joined: Sep 2011 Posts: 339 California	Great idea! I will try that! Quote: Quote: I am burning holes through the original sheet metal on my '72 Satellite. Is the wire speed not fast enough? It's a Lincoln flux wire unit with a hi-Lo setting only. Sometimes there is too much gap between the panels. If that's the case you might need to lay the gun down horizontally with the panel versus perpendicular. This will make it easier to bridge the gap. Hebrews 11:1

Re: Mig welding and blowing holes [Re: moparbroz] #1211773 04/09/12 01:15 AM 04/09/12 01:15 AM
Joined: Sep 2004 Posts: 654 MN astrobuf mopar
astrobuf mopar Joined: Sep 2004 Posts: 654 MN	Quote: I am burning holes through the original sheet metal on my '72 Satellite. Is the wire speed not fast enough? It's a Lincoln flux wire unit with a hi-Lo setting only. You really cannot weld sheet metal with Flux Core wirefeed. It's too uncontrollable. Seems like you must have a very odd Lincoln unit if it only has 2 speed settings. Even my old Lincoln WeldPak 100 has a pot to adjust feed speed. To do this correctly, you will need to pop for a real MIG setup. astrobuf So, are you really a Rocket Scientist?

Re: Mig welding and blowing holes [Re: moparbroz] #1211774 04/09/12 09:09 AM 04/09/12 09:09 AM
Joined: Oct 2003 Posts: 21,345 Marysville, O-H-I-O 70Cuda383 Too Many Posts
70Cuda383 Too Many Posts Joined: Oct 2003 Posts: 21,345 Marysville, O-H-I-O	Quote: I know but not financially feasible right at the moment unfortunately. Quote: Better off with solid wire and shielding gas! You'll be much happier!! I kicked myself for waiting so long before getting the gas shielding set-up on my welder. immediately my welds went from splattery bird poop to nearly perfect looking beads. can't wait till I get back on my car and welding sheet metal with it. going to gas is not expensive. you reverse the polarity on the welder from the flux core wire, and you can buy a regulator from Habor Freight for $20, then hit up your local TSC for a small bottle. I think it cost me about $200 to set up the gas shielding. when restoring a car, $200 should NOT break the budget, or your car's restoration is really going to suffer! remember it's a hobby. take your time, enjoy it, and do it right. if setting up the gas shielding means you wait a few extra months before buying the next replacement panel, then so be it. your results WILL be better Photobucket sucks

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