I have created a helix spiral using 2 helix' & then converting their edges in 2 seperate 3D sketches. (http://grabcad.com/questions/tutorial-how-to-model-helix-as-sheet-metal-part)

Using lofted sheet metal, I've been able to create the flat pattern for the auger flight section but I can't get any bend lines for a press brake.

Is there any work around for this, has anyone encountered this problem before?

There's a video showing a company using specialist equipment to press their flights but I'm hoping to get away with regular press brake.

The problem is that I've no idea where to press the part.

http://www.youtube.com/watch?v=ZC6pr4PNuJE