Apparatus for pipe or bar straightening

摘要

The apparatus incorporates several pairs of straightening roll pairs arranged one after another in the pipe transport direction. At least one roll of each pair is a driven roll. To produced pipe rotation, the rolls are set at an angle to one another and to the pipe axis. Distance between the rolls in each pair can be adjusted, and offsetting the rolls (perpendicular to the pipe transport direction) relative to one another in adjacent roll pairs. The distance between the rolls in their respective pairs is adjusted using a hydraulic adjusting unit (26) with cylinders (28) and pistons (30) whose rods (32) are connected to the corresponding adjustable rolls.