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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Bend .130" thick 6061 T6 around 1" radius?
I want to make an adjustable cheek rest for a rifle stock.
I want to bend the 1" wide Aluminum around a 2" pipe for 180 degrees. Do I need to anneal it? Do I need to do it while it is hot? Thanks in advance. |
#2
Posted to rec.crafts.metalworking
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Bend .130" thick 6061 T6 around 1" radius?
wrote in message ... I want to make an adjustable cheek rest for a rifle stock. I want to bend the 1" wide Aluminum around a 2" pipe for 180 degrees. Do I need to anneal it? Do I need to do it while it is hot? Thanks in advance. It is important that you know the grain direction. If you bend parallel to the grain, it most likely will crack. You can usually determine the grain direction by visual inspection. If you anneal, it will be quite soft afterwards, and won't regain it's formal hardness. If you choose to anneal, it would be wise to solution anneal the item first, then it can be artificially aged once again to the T6 condition. I would recommend against bending hot. It will work quite easily if annealed, but can be rolled in the T6 condition if you have the means to do so. Harold |
#3
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Bend .130" thick 6061 T6 around 1" radius?
On Mon, 1 Aug 2011 22:34:56 -0700 (PDT), "
wrote: I want to make an adjustable cheek rest for a rifle stock. I want to bend the 1" wide Aluminum around a 2" pipe for 180 degrees. Do I need to anneal it? Do I need to do it while it is hot? Thanks in advance. What kind of aluminum are you planning on useing? I think if you were going to use the common 6061..you can simply heat it up, which softens it up, bend it and reharden. http://www.cnczone.com/forums/bendin...3_16_inch.html "found the best way to anneal aluminum is with an oxy/ acetylene rig. Use the biggest rosebud you have, a #8 is plenty big, burn the acetylene without the oxygen, cote the aluminum with that black nasty soot, turn on the oxygen to a nice neutral flame, and apply just enough heat to burn away the soot from the aluminum. Let it cool naturally and your medium is back to moving like butter. " -- "The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency. It will be far easier to limit and undo the follies of an Obama presidency than to restore the necessary common sense and good judgment to a depraved electorate willing to have such a man for their? president.. Blaming the prince of the fools should not blind anyone to the vast confederacy of fools that made him their prince". |
#4
Posted to rec.crafts.metalworking
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Bend .130" thick 6061 T6 around 1" radius?
On 8/1/2011 11:24 PM, Gunner Asch wrote:
On Mon, 1 Aug 2011 22:34:56 -0700 (PDT), " wrote: I want to make an adjustable cheek rest for a rifle stock. I want to bend the 1" wide Aluminum around a 2" pipe for 180 degrees. Do I need to anneal it? Do I need to do it while it is hot? Thanks in advance. What kind of aluminum are you planning on useing? I think if you were going to use the common 6061..you can simply heat it up, which softens it up, bend it and reharden. http://www.cnczone.com/forums/bendin...3_16_inch.html "found the best way to anneal aluminum is with an oxy/ acetylene rig. Use the biggest rosebud you have, a #8 is plenty big, burn the acetylene without the oxygen, cote the aluminum with that black nasty soot, turn on the oxygen to a nice neutral flame, and apply just enough heat to burn away the soot from the aluminum. Let it cool naturally and your medium is back to moving like butter. " -- "The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency. It will be far easier to limit and undo the follies of an Obama presidency than to restore the necessary common sense and good judgment to a depraved electorate willing to have such a man for their? president.. Blaming the prince of the fools should not blind anyone to the vast confederacy of fools that made him their prince". Make a carburizing flame with the oxyacetylene torch and deposit a soot surface onto the aluminum. then flow more oxygen for a hot flame and heat the aluminum evenly until the soot disappears, then you know the aluminum is annealed and soft |
#5
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Bend .130" thick 6061 T6 around 1" radius?
On Tue, 02 Aug 2011 16:38:46 -0700, "T.Alan Kraus"
wrote: On 8/1/2011 11:24 PM, Gunner Asch wrote: On Mon, 1 Aug 2011 22:34:56 -0700 (PDT), " wrote: I want to make an adjustable cheek rest for a rifle stock. I want to bend the 1" wide Aluminum around a 2" pipe for 180 degrees. Do I need to anneal it? Do I need to do it while it is hot? Thanks in advance. What kind of aluminum are you planning on useing? I think if you were going to use the common 6061..you can simply heat it up, which softens it up, bend it and reharden. http://www.cnczone.com/forums/bendin...3_16_inch.html "found the best way to anneal aluminum is with an oxy/ acetylene rig. Use the biggest rosebud you have, a #8 is plenty big, burn the acetylene without the oxygen, cote the aluminum with that black nasty soot, turn on the oxygen to a nice neutral flame, and apply just enough heat to burn away the soot from the aluminum. Let it cool naturally and your medium is back to moving like butter. " -- "The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency. It will be far easier to limit and undo the follies of an Obama presidency than to restore the necessary common sense and good judgment to a depraved electorate willing to have such a man for their? president.. Blaming the prince of the fools should not blind anyone to the vast confederacy of fools that made him their prince". Make a carburizing flame with the oxyacetylene torch and deposit a soot surface onto the aluminum. then flow more oxygen for a hot flame and heat the aluminum evenly until the soot disappears, then you know the aluminum is annealed and soft If you want 6061-T6 to return to anything close to T6 after working and aging, you want to quench it fairly quickly from 900 degrees, not let it cool slowly. |
#6
Posted to rec.crafts.metalworking
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Bend .130" thick 6061 T6 around 1" radius?
On Mon, 1 Aug 2011 22:34:56 -0700 (PDT), "
wrote: I want to make an adjustable cheek rest for a rifle stock. I want to bend the 1" wide Aluminum around a 2" pipe for 180 degrees. Do I need to anneal it? No. Do I need to do it while it is hot? No. Thanks in advance. You've got plenty of advice on how to anneal the aluminum, but it's unecessary at that radius and material thickness, unless you can't apply enough force to bend the stock in T6 condition. Kaiser recommends a min bend radius of 5/16" for .130 6061-T6; the ASM handbook says 9/32". -- Ned Simmons |
#7
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Bend .130" thick 6061 T6 around 1" radius?
"T.Alan Kraus" wrote in message ... On 8/1/2011 11:24 PM, Gunner Asch wrote: On Mon, 1 Aug 2011 22:34:56 -0700 (PDT), " wrote: I want to make an adjustable cheek rest for a rifle stock. I want to bend the 1" wide Aluminum around a 2" pipe for 180 degrees. Do I need to anneal it? Do I need to do it while it is hot? Thanks in advance. What kind of aluminum are you planning on useing? I think if you were going to use the common 6061..you can simply heat it up, which softens it up, bend it and reharden. http://www.cnczone.com/forums/bendin...3_16_inch.html "found the best way to anneal aluminum is with an oxy/ acetylene rig. Use the biggest rosebud you have, a #8 is plenty big, burn the acetylene without the oxygen, cote the aluminum with that black nasty soot, turn on the oxygen to a nice neutral flame, and apply just enough heat to burn away the soot from the aluminum. Let it cool naturally and your medium is back to moving like butter. " -- "The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency. It will be far easier to limit and undo the follies of an Obama presidency than to restore the necessary common sense and good judgment to a depraved electorate willing to have such a man for their? president.. Blaming the prince of the fools should not blind anyone to the vast confederacy of fools that made him their prince". Make a carburizing flame with the oxyacetylene torch and deposit a soot surface onto the aluminum. then flow more oxygen for a hot flame and heat the aluminum evenly until the soot disappears, then you know the aluminum is annealed and soft 0.130" 6061, if it's T4 temper or below, shouldn't require annealing to bend around a 2" pipe. If it's T6, all bets are off. But I'd still try it before doing some kind of spot anneal without temperature control. If you anneal it with a torch, some of it will be heated to solution temperature and some won't. That which isn't will be left partially softened forever. That which is will eventually return to something close to T4 through age hardening. To achieve T4 (20 ksi yield) requires a little over 400 days of natural age hardening. Two other things to think about: The yield strength of 6061 falls off by about 2/3 at 500 deg. F. That's well below solution temperature, so you can heat it in a kitchen oven and bend it quickly without causing big strength problems. The other thing is that local heating with a torch is going to create a heat-treatment mess in a hardenable grade of aluminum. The strength will vary all over the piece, and, as I mentioned, it will change over time. Torch annealing is something that's commonly done to anneal non-heat-treatable alloys (3XXX and 5XXX series alloys) while you're hammer-forming it, or otherwise cold-working it. But it's not usually a good idea with 2XXX, 6XXX, or 7XXX series alloys that have been heat-treated to a T4 temper or above. -- Ed Huntress |
#8
Posted to rec.crafts.metalworking
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Bend .130" thick 6061 T6 around 1" radius?
wrote in message ... On Tue, 02 Aug 2011 16:38:46 -0700, "T.Alan Kraus" wrote: On 8/1/2011 11:24 PM, Gunner Asch wrote: On Mon, 1 Aug 2011 22:34:56 -0700 (PDT), " wrote: I want to make an adjustable cheek rest for a rifle stock. I want to bend the 1" wide Aluminum around a 2" pipe for 180 degrees. Do I need to anneal it? Do I need to do it while it is hot? Thanks in advance. What kind of aluminum are you planning on useing? I think if you were going to use the common 6061..you can simply heat it up, which softens it up, bend it and reharden. http://www.cnczone.com/forums/bendin...3_16_inch.html "found the best way to anneal aluminum is with an oxy/ acetylene rig. Use the biggest rosebud you have, a #8 is plenty big, burn the acetylene without the oxygen, cote the aluminum with that black nasty soot, turn on the oxygen to a nice neutral flame, and apply just enough heat to burn away the soot from the aluminum. Let it cool naturally and your medium is back to moving like butter. " -- "The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency. It will be far easier to limit and undo the follies of an Obama presidency than to restore the necessary common sense and good judgment to a depraved electorate willing to have such a man for their? president.. Blaming the prince of the fools should not blind anyone to the vast confederacy of fools that made him their prince". Make a carburizing flame with the oxyacetylene torch and deposit a soot surface onto the aluminum. then flow more oxygen for a hot flame and heat the aluminum evenly until the soot disappears, then you know the aluminum is annealed and soft If you want 6061-T6 to return to anything close to T6 after working and aging, you want to quench it fairly quickly from 900 degrees, not let it cool slowly. No matter what you do, natural age hardening won't get you above T4. -- Ed Huntress |
#9
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Bend .130" thick 6061 T6 around 1" radius?
T.Alan Kraus wrote:
On 8/1/2011 11:24 PM, Gunner Asch wrote: On Mon, 1 Aug 2011 22:34:56 -0700 (PDT), " wrote: I want to make an adjustable cheek rest for a rifle stock. I want to bend the 1" wide Aluminum around a 2" pipe for 180 degrees. Do I need to anneal it? Do I need to do it while it is hot? Thanks in advance. What kind of aluminum are you planning on useing? I think if you were going to use the common 6061..you can simply heat it up, which softens it up, bend it and reharden. http://www.cnczone.com/forums/bendin...3_16_inch.html "found the best way to anneal aluminum is with an oxy/ acetylene rig. Use the biggest rosebud you have, a #8 is plenty big, burn the acetylene without the oxygen, cote the aluminum with that black nasty soot, turn on the oxygen to a nice neutral flame, and apply just enough heat to burn away the soot from the aluminum. Let it cool naturally and your medium is back to moving like butter. " -- "The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency. It will be far easier to limit and undo the follies of an Obama presidency than to restore the necessary common sense and good judgment to a depraved electorate willing to have such a man for their? president.. Blaming the prince of the fools should not blind anyone to the vast confederacy of fools that made him their prince". Make a carburizing flame with the oxyacetylene torch and deposit a soot surface onto the aluminum. then flow more oxygen for a hot flame and heat the aluminum evenly until the soot disappears, then you know the aluminum is annealed and soft and if you stay just a second too long, it plops on the floor in a ugly puddle. AO is pretty darned hot. After screwing up a few pieces I started using propane to burn off the soot. You can still melt a hole but you have to work at it a bit more. |
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