Patent ID: 8596332

Claim:
A speed synchronization system for an aluminum alloy slab continuous casting and rolling line having a twin-belt casting machine and a skin pass rolling machine, said aluminum alloy slab continuous casting and rolling line speed synchronization system comprising a casting slab speed detecting means positioned between a twin-belt casting machine and a skin pass rolling machine for detecting the cast slab speed, said casting slab speed detecting means comprising pinch rolls, a laser speed meter, or the combination of pinch rolls and a laser speed meter, and a control and drive system comprising: means for comparing cast slab speed with a line speed setting to obtain a difference and to cumulatively add the difference between the cast slab speed and the line speed setting to calculate a residual error, means for controlling the roll speed of the skin pass rolling machine by proportional and integrated control in response to said difference and residual error so as to correct the speed of the skin pass rolling machine without changing the reduction rate, and means for simultaneously calculating a suitable belt speed for the twin-belt casting machine from said line speed setting and a solidification shrinkage rate of the aluminum alloy slab so as to drive the belt drive system so as to thereby synchronize the roll speed of the skin pass rolling machine and the belt speed of the twin-belt casting machine.