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11-06-2011, 01:15 AM | #1 |
Newbie Join Date: Apr 2011 Location: simi valley
Posts: 31
| How to weld aluminum chassis???
Im trying to build a scale chassis for my car and i cant get the welds to stick to the aluminum and i went to get a pencil torch and hand torch so i dont know what to do and iv been following all the instructions so help please thanks
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11-06-2011, 01:24 AM | #2 |
Quarry Creeper Join Date: Mar 2011 Location: Universal City, TX
Posts: 408
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Correct me if I am wrong, but don't you need a TIG welder to weld aluminum? It can be brazed, though, using this: Aero Braze Rod & Flux. |
11-06-2011, 08:00 AM | #3 | |
Newbie Join Date: Apr 2011 Location: simi valley
Posts: 31
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11-06-2011, 08:07 AM | #4 |
Quarry Creeper Join Date: Aug 2009 Location: another state of mind..?
Posts: 215
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mig, tig, braze or torch welding. but a stick welder will not work. screws allways work and will hold any two items together. |
11-06-2011, 08:18 AM | #5 |
Newbie Join Date: Oct 2011 Location: auburn
Posts: 4
| tig it
Use a tig welder its stronger cleaner and you can control the heat a lot easier. If you don't have access most certified welders like beer.
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11-06-2011, 08:44 AM | #6 | |
Pebble Pounder Join Date: Oct 2011 Location: Fountain
Posts: 100
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11-06-2011, 09:09 AM | #7 |
Pebble Pounder Join Date: Dec 2008 Location: Lake County
Posts: 174
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Welding alluminum with a torch is not easy! I did it using all. stick rod, it has flux on it. It worked but looked messy. If I was going to try it again I'd get some small dia. stick rod, and some good flux paste. I was also told that cobalt blue lenses let you see the puddle better, but I could never find any? Good luck, and pics! |
11-06-2011, 10:19 AM | #8 |
RCC Addict Join Date: Jun 2006 Location: IN THE PIT !!
Posts: 1,039
| all i can say is good luck with that !! with out any kind-a shield gas, your going to have a vary dirty weld. dirty welds = no strength, even more so in alum welding. all-though alum can be welded with a stick or a gas welder, your not going to get a good/strong weld !! Ive been welding alum crawler chassis for years now, tig is the only way to go the DmG |
11-06-2011, 10:29 AM | #9 |
www.ottsix.com Join Date: Mar 2011 Location: Albuquerque, New Mexico USA
Posts: 2,050
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How to braze aluminum: 1. Use high quality brazing rod. Clean your aluminum stock with MEK...then clean it again using a new rag. The aluminum can have ZERO mill oil contamination. Be sure to remove the MEK to another room and rid your work room of ALL MEK fumes as they are EXTREMELY flammable. 2. A simple propane torch works fine here...MAP doesn't work as well because it overheats the outer part of the work piece while leaving the core relatively cool. Also with MAP, by the time the core heats, the outer surface of the aluminum will sustain heat related damage in the form of oxidation, which will ruin the piece all together, It take time for even heating to occur. "tin" both ends first. Use a "helping hands" type jig to hold your work in the air to avoid any heat sinking that a solid surface will create. Heat the surfaces slowly to the point the the rod will melt when placed of the surface...you don't want your flame to melt the rod. (this is where high quality rod shines) 3. Place both pieces together leaving a 2mm gap between them, again using a "helping hands" type jig. 4. Aluminum looses heat VERY quickly. Do not pull your flame away at any time, it only takes a micro second to loose the heat it took a minute to gain! 5. Place your brazing rod to the area of the 2mm gap first, it'll fill very quickly. Then run the rod up and down...don't be afraid to "over fill" the area because you'll need to grind it down later anyways. Carbide grinding bits work very well for this, but you can even use hand files if you have all day to work on it. 6. Important: Do not touch or otherwise move your work piece for a good 15min! Also: Do not attempt to "temper" the piece with water or oil. feel free to PM me as needed |
11-06-2011, 11:37 AM | #10 |
Rock Crawler Join Date: Sep 2009 Location: Temecula Ca
Posts: 566
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J/B Weld
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11-06-2011, 11:55 AM | #11 | |
Quarry Creeper Join Date: Aug 2009 Location: another state of mind..?
Posts: 215
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thanks thats what I am saying with regard to stick welding alum. | |
11-06-2011, 02:46 PM | #12 |
www.ottsix.com Join Date: Mar 2011 Location: Albuquerque, New Mexico USA
Posts: 2,050
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11-06-2011, 03:14 PM | #13 |
Rock Crawler Join Date: Mar 2008 Location: 920 Valley of the Fox
Posts: 768
| I don't think it was necessary to start 3 different threads on this... |
11-06-2011, 03:32 PM | #14 |
RCC Addict Join Date: Jun 2006 Location: IN THE PIT !!
Posts: 1,039
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11-06-2011, 03:42 PM | #15 | |
Pebble Pounder Join Date: Nov 2007 Location: Arnold
Posts: 194
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11-06-2011, 08:35 PM | #16 |
Rock Crawler Join Date: Mar 2008 Location: 920 Valley of the Fox
Posts: 768
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11-06-2011, 09:31 PM | #17 |
www.ottsix.com Join Date: Mar 2011 Location: Albuquerque, New Mexico USA
Posts: 2,050
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well, first he was talking about welding, then he started talking about torches so I figured he might want some info on brazing...because if he's hitting aluminum with an OA torch to weld it, that's about the worst thing he could do. The J/B just sort of slid in somehow (but it does make for a good side note)
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11-06-2011, 10:35 PM | #18 |
I wanna be Dave Join Date: Sep 2008 Location: four o six
Posts: 2,101
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durafix baby...strong to |
11-07-2011, 04:11 AM | #19 |
Rock Crawler Join Date: Sep 2009 Location: Temecula Ca
Posts: 566
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11-07-2011, 04:13 AM | #20 |
Rock Crawler Join Date: Sep 2009 Location: Temecula Ca
Posts: 566
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