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#1
12-25-2015, 02:23 PM
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Sheet Metal Forming for Aircraft skins
Hey There from Charlotte, NC. New member - interested in forming complex curves in sheet aluminum for aircraft skins. My searches kept coming back to AllMetalShaping.com - so I figured this is where the Knowledge is...
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Tim Findlow 
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#2
12-25-2015, 02:58 PM
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welcome to the forum.
What exactly are you trying to make? happy holidays
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Marcus Goetting If it was easy -- they would do it at Walmart  www.mgcustomairframe.com www.facebook.com/mgcustomairframe/
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#3
12-25-2015, 03:17 PM
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Tim,
A/C skins are usually make from 2024 aluminum which often requires heat treating after compound forming. Most of the aluminum work you'll see on this site is done with 3003 or 1100 aluminum. The latter two are very weldable. 2024 is not. You'll learn a lot here as we have some great a/c workers here. However, don't mix up the alloys.
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Bill Longyard Winston-Salem, NC
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#4
12-25-2015, 03:48 PM
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Quote:
Will
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Here to learn. William Pointer
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#5
12-25-2015, 07:06 PM
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Quote:
d. Nos. 2024 and 7075 Aluminum. Do not weld these two aluminum alloys (that are often used in aircraft construction  ) because the heatfrom the welding process will cause severe cracking.
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Bill Longyard Winston-Salem, NC
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#6
12-25-2015, 07:23 PM
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Not welded 7075 so can't comment there.
2024 can crack if you weld it in one of its higher tempers depending on what you are trying to do, don't for instance try to insert a circular patch, but when properly annealed it welds like any other grade and doesn't crack at all. When I say properly annealed I mean you take it to the heat treatment plant and have them do a full anneal and furnace cool, make your weld with strips of native material then have the heat treatment plant put the desired temper back. Never had a problem with it. As a slight aside, the skins of the Handley-Page Victor wing were extensively spot-welded with no issues and they were 2024. Will
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Here to learn. William Pointer Last edited by AllyBill; 12-25-2015 at 07:27 PM.
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#7
12-25-2015, 04:33 PM
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Hi Tim,
Welcome. Hope we can help. I was an EAA tech counselor for many years, on sheet metal and welding. Aircraft over the years have used 1100, 3003, 5052, 6061, 2024, and 7075. Some shaping is done in T-3 on the 2024.
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Kent "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919.
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#8
12-25-2015, 05:19 PM
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Hello Tim and welcome to the forum.
Jere
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Jere Kirkpatrick Valley Forge & Welding HEN-ROB Torch Dealer. Teaching The Fundamentals of Metal Shaping www.jerekirkpatrick.com All tools are a hammer except the chisel.....That's a screwdriver.
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