| 摘要 |
PURPOSE:To prevent local wear of work roll and also to prevent slipping when threading by applying always lubricant on the surface of work roll corresponding to the 20-50% of both end parts in the width of a material to be rolled. CONSTITUTION:Lubricant is always applied on the part of work roll where the edges of the material to be rolled is brought into contact by nozzles 2 for oil injection and the relation between the applied range (l) and the width (w) of the material to be rolled: 2l/w is taken so as to be 0.2-0.5. When <20%, effect of improvement for edge wear can't be sufficiently obtained and, if <=50%, also the slipping when biting isn't generated. Local wear and local surface roughening of work roll in the vicinity of the part where the edge part of the material to be rolled is brought into contact are prevented and also slipping when the material is threaded can be prevented and these are effective to the improvement of productivity. |
