In metal rolling operations, the pl

In metal rolling operations, the plastic deformation causing a reduction in thickness will also cause an increase in the width of the part, this is called spreading.When the work being processed has a high width to thickness ratio, the increase in width is relatively small and usually of no concern in industrial manufacturing practice. In cases of low width to thickness ratios, such as a bar with a square cross section, spreading can be an issue. Vertical rolls can be employed to edge the work and maintain a constant width.