I had to modify the bender in several areas to bring up the bend quality. I've had excellent success with a rotary compression type bender that I got from. Heard of sand, water, even coil springs being used inside to mitigate wrinkling on the inside of the bend. I've seen bismuth and heat used with good success. Hi, Heinz here there are plenty of ways to bend tubing, some often involve filling the tube to be bent with non-compressible things. The professionals use a liquid that solidifies on becoming cold, ie. but your bend ratio of 5:1 sounds OK.Īs Tom says, try it cold first of all, preferably around a mandrel The info that Tom gave you was highly informative ! My recommendation would be to try the easiest (cold working) first, then if acceptable results are not achieved, try either of the other two (as they produce similar results). Oftentimes if you're trying to bend thin walled tubing, you can fill it with sand and TIGHTLY cap the ends before bending (no sand leakage). Annealing should be done at 775 ☏ for 2 to 3 hours followed by controlled cooling at 50 ☏ per hour down to 500 ☏, then air cool. Hot working may be done in the temperature range of 700 ☏ to 500 ☏. The alloy is notably less easy to cold form in the T 4 and T 6 tempers. Some basic facts:Ĭold working in the O temper condition is readily performed. Each of these will provide different results (and you may be limited based on readily available apparati). You can Cold Work, Hot Work, or Anneal and Cold Work. There are three ways to readily manipulate this material to work it. There are a couple of things you may want to know about 6061 AL.
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