Drawing square from round tubing - GIF

[Altair]

Drawing square from round tubing.




Previously:

Roll forming tubing - GIF
Roll forming round tubing to square - GIF
Square tubing cutter - GIF
Hydraulic press vs. square tubing - GIF
Making steel tubing - GIF

[nova_robotics]

I want to know how they pushed that first piece into the die.

[hemmjo]

I am thinking maybe they started that by swaging it on the end. Then it should not be so difficult to push it that last bit to reach the gripper.

I am surprised there is no visible lubrication? I would think that operation would be flooded with lube. Maybe too much lube would deform the final shape?

If you lube brass too much when resizing, the lube can puddle and dent the case.

[Frank S]

I am thinking maybe they started that by swaging it on the end. Then it should not be so difficult to push it that last bit to reach the gripper.

I am surprised there is no visible lubrication? I would think that operation would be flooded with lube. Maybe too much lube would deform the final shape?

If you lube brass too much when resizing, the lube can puddle and dent the case.

There is lube on it, If you ever buy a whole bundle of tubing, you'll find that every time you touch it your hands or gloves will be oily and black You have to wipe it down before welding. When I used to buy by the bundles many times, I would try to buy pre primed tubing the coating was thin enough to weld through unless you were tig welding it. Pre primed cost a little more, but the time saved in clean up or having to prime it before painting was well worth the extra expense. another benefit was my uniform rental company loved me for it.

[hemmjo]

When I could afford to buy new tubing, I always thought that oily coating was a remnant of lube used in the forming process.