IMPROVEMENT OF METAL-SAVING TECHNOLOGY OF PIPE ROLLING ON A PILGRIMM MILL

The features and prospects for the development of the process of rolling a pilgrim head on the free section of the mandrel are considered. The main problem of this process is the displacement of the section along the mandrel in the direction of rotation of the pilgrim mill rolls. Based on the theory of elastic-plastic impact of the pilgrim head and mill rolls, the post-impact velocities and pipe displacements for real conditions of pilgrim rolling are calculated. Two methods of reducing the displacement of the pilgrim head during its interaction with the rolls are considered: reducing the angular velocity of the rolls during rolling of the pilgrim head and using brake pads that create back tension on the pipe.