| 摘要 |
PURPOSE:To provide a rolling mill enabled to obtain a product having a prescribed shape by oneself, by installing plural grooved rolls and flat rolls around a main axis in planetary constitution and rotating the main axis faster than the feeding speed of a rolling material. CONSTITUTION:Plural grooved work rolls 1' having respectively different groove shapes and flat rolls 1 are installed rotatably in planetary constitution around the main axis 3 of a rolling mill. When a material 2 is fed at a given speed, the axis 3 is rotated at high speed at least faster than the feeding speed of material 2 to roll it by the rolls 1, 1'. For instance, the material 2 is edged by the flat work rolls 1, and a dog bone shape generated at the material end is pushed toward the width center by the grooved work rolls 1' to obtain a prescribed dog bone shape. Further, one or two horizontal mills are provided to one or both sides of the front or rear stage of the caliber mill to perform rolling of the small extent of breadth restoration. |
