 Bending Aluminum, Heat ? |
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| jim_hoyland |
 Aug 31 2009, 06:43 PM
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#1
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Get that VIN ?  Group: Members Posts: 9,287 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California 
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I'm bending L stock made of aluminum for a bracket. Should I be heating the aluminum before bending ? The first piece formed a crack after bending.
It's the thin stuff sold at Home Depot-- |
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| r_towle |
Aug 31 2009, 06:46 PM
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#2
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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from my experience and the mechanical guys I was working with on robotics...the home depot stock is not always bendable...its the wrong type of aluminum...there are loads of types.
I have used a torch...it does not melt till 1200 degrees, but to much heat does make it funky. I heat it, but I do a heat, then bend a little...then heat..then bend... Rich |
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| jmill |
Aug 31 2009, 06:47 PM
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#3
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
It's hardend. Most L stock is an extrusion. Never bent extrusion in the aircraft industry. FAA doesn't like it cause it cracks. You can try a shrinker stretcher. Heat will make it loose its temper (hardness). If that doesn't matter torch away. Aluminum turns shiny a split second before it melts.
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| jim_hoyland |
Aug 31 2009, 06:54 PM
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#4
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Get that VIN ? Group: Members Posts: 9,287 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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Thanks for the heads up. I have a plan B that will not require bending. (IMG:style_emoticons/default/smile.gif)
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| Mikey914 |
Aug 31 2009, 08:23 PM
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#5
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The rubber man Group: Members Posts: 12,661 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
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I have 6063 O (bendable) aluminum round tube. I use for applied grab rail on my railing. It's 1.9" OD. Let me know if you need any.
DIYRailing.com |
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| rick 918-S |
Aug 31 2009, 10:46 PM
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#6
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Hey nice rack! -Celette Group: Members Posts: 20,454 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region 
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Take an oxy acetalene torch, light the acetylene only apply some of the soot to the aluminum stock in the location of the bend on both sides. The add the oxygen to make a neutral flame. Use the flame to remove the soot from the aluminum. When you have carefully removed the soot you will have expanded the molecules and softened the metal.
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