铝卷在冷轧制过程中，因轧辊与铝板表面摩擦和碾压，其表面会产生细微的氧化铝粉脱落和吸附，轧制油及其附带悬浮成分会残留在铝卷表面，对铝卷复合、涂装等成品加工造成不利影响。
In the cold rolling process of aluminum coil, due to the friction and rolling between the roll and the surface of aluminum plate, fine aluminum oxide powder will fall off and adsorb on the surface. The rolling oil and its attached suspended components will remain on the surface of aluminum coil, which has adverse effects on the processing of aluminum coil composite, coating and other finished products.
拉弯矫直时由于带材在辊上产生剧烈弯曲变形，对带材施加的张力一部分转化为带材对张力辊的压力，并终形成摩擦力，带动辊组。如果氧化铝卷表面未经清洗，变形时氧化铝粉脱落，随着油污一起附在张力辊的辊面，使辊面产生磨损，并造成铝板略伤，故必须通过专门的清洗装置进行清洗。
During stretch bending straightening, due to the severe bending deformation of the strip on the roll, a part of the tension applied to the strip is transformed into the pressure of the strip on the tension roll, and finally the friction force is formed to drive the roll group. If the surface of aluminum oxide coil is not cleaned, the aluminum oxide powder will fall off when it is deformed and attach to the roll surface of tension roll with oil stain, which will cause wear on the roll surface and slightly damage the aluminum plate. Therefore, it must be cleaned by special cleaning device.

铝卷清洗就是利用压力泵对清洗介质加压，对带材表面进行非接触式喷洗或接触式刷洗，使材料表面的铝粉油污溶解脱落到清洗介质中，再经挤干辊挤干和高压空气吹扫，甚至高温空气烘干，以获得洁净干燥的铝卷。
Aluminum coil cleaning is to use the pressure pump to pressurize the cleaning medium, non-contact spray or contact brushing on the surface of the strip, so that the aluminum powder oil on the surface of the material dissolves and falls off into the cleaning medium, and then the aluminum coil is dried by squeezing roller, high-pressure air blowing, and even high-temperature air drying, so as to obtain clean and dry aluminum coil.
同时，通过不断补充清洗介质与在线循环过滤系统同时使用，使清洗介质保持足量和清洁，并大大节约热能和清洗介质。目前，铝卷加工行业的拉弯矫直机常用的清洗介质有清洗剂（或称溶剂油）、软化热水、化学溶剂。
At the same time, by continuously replenishing the cleaning medium and using the online circulating filtration system at the same time, the cleaning medium can be kept sufficient and clean, and the heat energy and cleaning medium can be greatly saved. At present, cleaning agents (or solvent oil), softened hot water and chemical solvents are commonly used in the straightening machine of aluminum coil processing industry.