Roll Axes

The plate development has an option to evaluate the main directions of curvature. The result is called the primary and secondary roll axes, respectively. They are intended for guidance how to apply the roll in an initial rolling of the forming process. The roll axes are defined by the two edges of maximum relative curvature. For a purely cylindrical plate the two roll axes coincide.

The primary roll axis is indicated in the sketch of the developed plate by a solid bold line in the same colour as the plate itself, the second one as a solid line with normal thickness (see the sketch below).