Re: Home made tools!
Here are some pics of my homemade square tubing bender die that I made from 1/4" steel plate and a cheapo HF pipe bender. The tubing is 1" square 0.125" wall 6061-T6 aluminum. The bend shown was just a test in the T6 tube to check for deformation. I plan on having the tubing annealed back to the "0" condition before the actual bends are made. I debated filling the tube with sand to maintain the tubing shape, but found this wasn't necessary. This was a much, much cheaper alternative to buying a professional bender with the appropriate die. I also found that most of the professional square tubing dies have a "crusher" strip in the center that purposely collapses the wall along the inside of the bend. This would be unacceptable for a clean looking bend. I can post additional pics and/or a printout of the die pattern if anybody is interested.
Linde/Union Carbide HDA-300
Hobart RC-250
Lincoln AC-225
Lincoln WeldPak 100
Hobart Stickmate LX
Victor OxyAcetylene