Straightening roll structure of steel straightener

The utility model relates to a straightening roll structure of a steel straightening machine, which comprises a plurality of upper straightening rolls and lower straightening rolls, the upper straightening rolls are arranged above the lower straightening rolls, grooves are arranged on the outer peripheral surfaces of the upper straightening rolls, bulges matched with the grooves are arranged on the outer peripheral surfaces of the lower straightening rolls, and a steel inlet and outlet space is defined between the grooves and the bulges. Each groove internally comprises a first arc-shaped face, each first arc-shaped face is of a circular-arc-shaped structure and extends towards the lower straightening roller, each protrusion comprises a second arc-shaped face, each second arc-shaped face is of a circular-arc-shaped structure and extends towards the upper straightening roller, and each second arc-shaped face is of a circular-arc-shaped structure and extends towards the lower straightening roller. According to