Abstract:
This study is aimed at gaining an understanding of the cold roll forming process. A systematic investigation has been carried out to study the effect of varying flange length, web width, material thickness
and roll scheduling on the longitudinal curvature of symmetrical trapezoidal sections. The longitudinal strain histories have also been studied by bonding strain gauges onto the surfaces of the strip.
Material used is mild steel.
For any single roll pass sequence, the 1ongitudina1 curvature is found to exhibit a maximum value at certain ratio of the overall strip width to web width. This behaviour is not observed during multiple roll passes forming. Longitudinal curvature increases as the fold angle and the thickness over flange length ratio (T/A) increases but decreases when web width increases.