What is the cause of rolling force fluctuation of hydraulic bending roll in cold rolling?

Hydraulic roll bending force and rolling force are two systems. In general, the fluctuation of rolling force will not affect the bending force. My analysis of the reasons has the following highlights:

1, modern rolling mill, because AGC and plate thickness automatically participate in the control, rolling is a dynamic balance process. When the shape and plate thickness fluctuate, the automatic control system participates in the work, so the bending roll and rolling force also fluctuate.

2. The large ellipticity of the roll neck affects the rolling force and roll bending. Because the bending cylinder acts on the roll neck.

3. The contact thickness gauge is affected by the plate type (severe or inappropriate plate type) or the detection value of the thickness gauge fault changes directly affecting the control system;

4. Hydraulic system problems.

Simple analysis is for reference only.