论文部分内容阅读
采用辊径差的异步轧制方法在四辊轧机上能够轧出极薄铝带的事实表明,有色金属极薄带材的加工可以突破普通轧制方法的框框。要想得到最佳的生产工艺条件,其必要的措施是采用带张力轧制或全异步恒延伸轧制。异步轧制以两辊周速不同予以实现,产生周速不同的方法有两种:一是辊径相同变转速;二是工作辊的转速相同而辊径不等。对异步轧制经大量研究表明,它具有降低变形区摩擦峰的特征(即降低平均单位压力),使轧制压力明显的降低,从而道次数可减少、工序简化、能耗降低,对薄材它具有恒延伸的特征,可突破轧机的最小可轧厚度的限制,虽然用一般轧机可以得到极薄材,但在产品的质量精度方面,异步轧制确优于普通轧制。本实验仅用一对不同辊径的轧辊,前后不带张力的条件下,在四辊冷轧机上,用0.16毫米的铝带轧出了0.022毫米的极薄带。这一事实表明,只简单地改变轧制方法就能发生巨大变化,证明了有色金属(如铝、铜及其合金)用异步轧制成材是大有希望的。
The fact that an asynchronously rolling method with a roll diameter difference can roll out an extremely thin aluminum strip on a four-high rolling mill shows that the processing of a very thin non-ferrous metal strip can break the conventional rolling frame. In order to get the best production process conditions, the necessary measure is to use the belt tension rolling or all-asynchronous constant elongation rolling. Asynchronous rolling to two different circumferential speed to be achieved, there are two different ways to produce different speeds: First, the same diameter variable speed; Second, the same work roll speed and roll diameter range. A great deal of research on asynchronous rolling has shown that it has the feature of reducing the friction peak in the deformation zone (ie, reducing the average unit pressure), reducing the rolling pressure significantly, reducing the number of passes, simplifying the process and reducing the energy consumption, It has the characteristic of constant extension, which can break the limit of the minimum rolling thickness of the rolling mill. Although it is possible to obtain the very thin material with a normal rolling mill, the asynchronous rolling is superior to the ordinary rolling in terms of the product quality accuracy. In this experiment, only a pair of rolls of different roll diameters were rolled out with an aluminum foil strip of 0.06 mm on a four-roll cold rolling mill without tension before and after. This fact shows that great changes can be made by simply changing the rolling method and proving that there is great promise for the non-ferrous metals such as aluminum, copper and their alloys to be rolled by asynchronous rolling.