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The W-style (reverse bending) method of designing breakdown rolls is recommended when forming high-strength very light or very heavy gauge materials. It can be combined with the versatile design for maximum results on light-gauge, high-strength material.
W-style can form more of the strip in the first pass than Edgeform or Versatile designs. It pre-forms more of the strip, giving greater stability, and provides a better presentation into the fin passes.
By comparison, there are some reasons that another design method may be a better choice:
Even with the limitations of the W-style, it remains a widely used and acceptable method for designing tooling.
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