If you have a series of tubes and you want to bend them without kinking then you need a tubing bender.
This tubing bender from K&S Engineering is great for bending tubes from 1/16" - 3/16" without kinks.
Good for aluminum, brass and copper. Heating the tubing with a torch until there is a change in color and letting it cool slowly will soften the tube. To re-harden simply heat the tube and quench in water.