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带材偏移特性 在轧机实际操作中,考虑良好的咬入能力是首要的,对于工作辊与带材交叉的交叉辊轧机,则尤为重要。 咬入特性是用一对绕辊身中心带有小点标记的工作辊轧制带材来进行研究的。测定印在带材表面记号的偏移量,就提供了带材偏角的信息。它引起带材偏移,形成带楔,即带材两边的厚度差。 带材的偏移可用交叉角对偏移指数E的影响来评价。偏移指数E等于两边间带楔h_(df)的变化率除以带材偏离中心量的变化率。即:
Strip Offset Characteristics In practice, it is important to consider good bite-in capacity, which is especially important for cross rollers where work rolls cross the strip. The bite-in feature was studied with a pair of work roll rolled strips marked with a small dot around the center of the roll. The offset of the mark printed on the strip surface is measured to provide information on the declination of the strip. It causes the strip to shift, forming a strip wedge, ie, the difference in thickness between the two sides of the strip. The offset of the strip can be evaluated by the effect of the crossing angle on the offset index E. The offset index E is equal to the rate of change of the ribbon wedge (df) divided by the rate of change of the strip off center. which is: