| 摘要 |
PURPOSE:To improve abrasion-resistant properties of mill rolls in rolling operation, by using a composite roll, consisting of an outer shell, formed with a rolling zone and a smooth zone made of abrasion-resistant high alloy material, and an inner shell made of tough low alloy steel, as a roll used for a three roll planetary mill. CONSTITUTION:Each of three rolling rolls 3 used for a three roll planetary mill is formed into approximately a conical shape by centrifugal casting ; a part of the outer surface of the roll 3 is formed into a rolling zone 5, which has a truncated-cone-shaped outer peripheral surface with an inclination angle alpha with respect to the axial center line and is positioned at the large diameter side in the direction of roll axis 3, and a part of said surface is formed into a smooth zone 6, which has the same shape of surface as mentioned above having an inclination angle beta and is positioned at the small diameter side. Further, these two zones form an annular outer shell part 7 and are made of abrasion-resistant high alloy material. Besides, an inner shell part 8, surrounded by the shell 7, is constituted of a tough ductile cast iron and is fixed to a rotary driving shaft 4 by a fixing part 9 through a axial hole 11. |
