SPEED SYNCHRONIZATION SYSTEM OF ALUMINUM ALLOY SLAB CONTINUOUS CASTING AND ROLLING LINE AND PRODUCTION FACILITY AND METHOD OF PRODUCTION OF ALUMINUM ALLOY CONTINUOUSLY CAST AND ROLLED SLAB USING SAME

摘要

A speed synchronization system in an aluminum alloy slab continuous castingand rolling line having a twin-belt casting machine and skin pass rollingmachine which suitably controls a belt speed of the twin-belt casting machineand roll speed of the skin pass rolling machine so as to obtain a soundaluminum alloy continuously cast and rolled slab and a production facility andmethod of production of an aluminum alloy continuously cast and rolled slabusing the same. These (1) compare an actually measured value of a slab speedduring advance from a twin-belt casting machine to a skin pass rolling machinewith a line speed setting to control a roll speed of a skin pass rollingmachine by proportional/integrated control and simultaneously (2) control abelt speed of the twin-belt casting machine based on the line speed settingand a solidification shrinkage rate of the aluminum alloy to be cast so as tosynchronize the belt speed of the twin-belt casting machine and the roll speedof the skin pass rolling machine.