彩铝卷的宽展问题

由于彩铝卷接触面摩擦力的影响，以及变形区的几何形状和尺寸的不同，彩色铝板卷的扩散沿高度方向分布不均匀
（1） 彩铝卷滑动扩展是指变形金属与轧辊在接触面上的相对滑动，增加了轧件的宽度。用△B1表示，这部分轧件展开后的宽度为：
B1=Bh+△B1

Due to the influence of the contact surface friction between the roll and the rolled piece, as well as the different geometry and size of the deformation zone, the spread of color aluminum coil plate is unevenly distributed along the height direction

(1) Sliding spread refers to the relative sliding between the deformed metal and the roller on the contact surface, which increases the width of the rolled piece. It is expressed in △ B1: and the width of this part of the rolled piece after spread is:
B1=Bh+△b1
(2) Flattening and spreading is due to the effect of contact friction resistance, which makes the metal on the side of the rolled piece turn over to the contact surface during the deformation process of the heat insulation color aluminum plate, so that the width of the rolled piece increases, expessed as △ B2
B2=B1+△B2=Bh+△B1+△b2
(3) Drum spread refers to the spread caused by the bulging of the side of the rolled piece, expressed as △ B3. At this time, the width of the rolled piece is:
B3=B2+△B3 = Bh+AB1+△B2+△B3
Therefore, the total width of rolled piece is:
△B=AB1+△B2+△B3
Generally speaking, the theory and calculation of the spread of heat insulation color aluminum coil is the difference between the width of the rolled piece and that of the rolled piece before rolling after the cross section of the rolled piece is transformed into a rectangle of the same thickness, that is, △ B = bh-bh0
The larger the friction coefficient f is, the more serious the non-uniform deformation is. In the case of corruptions, the larger the flattening spread and drum spread are, the smaller the sliding spread is.