| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of defects in shape such as dents on a ring-shaped material to be rolled. SOLUTION: When performing rolling by ring rolling so that the material to be rolled is made into target outside diameter, inside diameter and height with main rolls and a mandrel for performing thickness reduction in the radial direction of the material to be rolled and a pair of upper and lower edger rolls for performing height reduction in the axial direction of the material to be rolled while detecting the size of the outside diameter of the ring-shaped material to be rolled with a tracer roll, by changing the rolling conditions of the mandrel and the edger and the initial shape of the material to be rolled and preliminarily performing simulation, the forming conditions are rationalized.
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