Cold rolling of pipes and bars with the cold pilger or cold pilger step process

摘要

The rolled material is stretched to a lesser extent during the return stroke of the roll stand than during its forward stroke. The motion of the rolled material in the rolling direction is controlled during the forward and return strokes of the roll stand. The ring rolls or roll cheeks present a curvature of the roll groove to the rolled material within the working range in and against the rolling direction.