| 摘要 |
PURPOSE:To decrease the number of rolls to be prepd., to extend the life of the rolls and to eliminate the need for disposing a special slitter installation by bisecting a rolling material by a slitting path which makes use of the shearing force by the rolls for rolling. CONSTITUTION:The square pass existing in the pass sequence for the other steel bar which is not going to be slit is commonly used and is determined as the branch point for slit rolling. The material is notched for the purpose of bisection in the 1st wedging pass. The ununiform filling in apertures (m) parts is sized to form the sectional shape which is uniform on the right and left. The material is more deeply notched for the purpose of bisection in the 2nd wedging pass to obtain the two uniform continuous ovals. The material is thereafter subjected to slit rolling by the method utilizing the shearing force to obtain the rolling material having the bisected oval shapes. The material is then rolled into products by using the installed round-oval-round caliber system. |
