| 摘要 |
PURPOSE:To uniformize cooling to roll shaft direction by assembling a roll shaft having water supplying water grooves at both ends and drainage grove at center part and a roll sleeve having plural number of cooling water flowing path grooves to the roll shaft direction at inner face of the circumference to make integrated construction. CONSTITUTION:The roll shaft 1c having the water supplying grooves I, I' to circumferential direction at both ends of surface layer part 1b and the drainage groove II at center part and the roll sleeve 1a having plural number of the cooling water flowing path grooves 11 along the roll shaft 1c direction at inner face of the circumference are assembled and integrated. Under such constitution, the cooling water introducing in the roll shaft 1c is injected from the water supplying grooves I, I' in the surface layer part 1b of the roll shaft to cool the lower face of the sleeve 1a. After that, the cooling water is strongly flowed in the drainage groove II at center part, to develop turbulent flow, and further, forcedly cool the sleeve. By this method, the roll can be uniformly cooled, and deformation caused by thermal expansion of the roll shaft direction can be minimized and the deviation of thickness for the rapid cooled strip can be made to small. |
