ASYMMETRIC ROLLING APPARATUS, ASYMMETRIC ROLLING METHOD AND ROLLED MATERIALS FABRICATED BY USING THE SAME

摘要

PURPOSE: An asymmetrical rolling device and method and a rolled material sheet produced using the same are provided to prevent slip of a work piece and reduce bending of the work piece by applying asymmetrical shear stress, caused by a different between the diameters of rolls on both sides, while the rolls are operated at the same rotational linear velocity. CONSTITUTION: In an asymmetrical rolling method, a work piece(104) is rolled through first and second rolls(101,102) with first and second sides(104a,104b) contacting the first and second rolls. The second roll has a diameter greater than that of the first roll and a rotational angular speed different from that of the first roll. The work piece is rolled between third and fourth rolls(201,202) with the first and second sides contacting the third and fourth rolls. The fourth roll has a diameter greater than that of the third roll and a rotational angular speed different from that of the third roll. Therefore, different shear stresses are applied to the first and second sides of the work piece.