| 摘要 |
PURPOSE:To form well-shaped edge drops at both ends of rolling steel sheets arranged in two lines by measuring the distance between the two sheets and setting it to a target distance in parallelly rolling two lines of steel sheets at the same time by the same cold tandem mill. CONSTITUTION:Two rolls of steel sheets 1 are unwound from two pay-off reels 11 and are parallelly rolled by a cold tandem mill 12. In this case, the distance between both sheets 1 is measured by a measuring instrment 14 provided to each rolling stand to input its measured value to a comparison arithmetic device 15. The device 15 compares the inputted value with a set value of target intersheet distance, and a shape controlling means of each stand is actuated each by an outputted value obtained by said comparison to make the distance between the sheets coincide with the set value. The shapes of edge drops at both ends of rolled sheet 1 are adjusted to make the plated surfaces at both ends flat when the sheet surface is subjected to galvanizing treatment. |
