Controlling method of bonding pass rolling of aluminum composite panel coarse rolling machine

The invention provides a controlling method of bonding pass rolling of an aluminum composite panel coarse rolling machine, and belongs to the technical field of metal pressure processing. The method comprises the steps that a roll gap of the rolling machine is opened in the first pass of the bonding rolling of the aluminum composite panel coarse rolling machine, a to-be-rolled aluminum ingot is conveyed to the rolling machine to allow the head of the aluminum ingot to enter the roll gap of the rolling machine, the roll gap of the rolling machine is pressed downwards to generate the rolling force with the capacity of 100 tons, the rolling of the first pass is completed in the manner of constant rolling force, the average value of the roll gap of the rolling machine is computed in the rolling process of the bonding pass, and the roll gap of the rolling machine in the next bonding pass is reduced by one adjusting unit delta s on the basis of the roll gap average value computed in the current pass, the rolling of