Method for automatically passing through fault of vertical roll

The invention provides a vertical roll fault automatic idle passing method, and relates to the field of steel rolling, and the method comprises the following steps: after an intermediate billet is subjected to head cutting, the speed is reduced to 0.8 m/s from 1.1 m/s, and the intermediate billet enters a finish rolling descaling machine at the speed of 0.8 m/s; after passing through a finish rolling descaling machine, the intermediate billet enters a finish rolling vertical roll to be rolled and then enters a finish rolling machine to be rolled; in the rolling process, if faults of a motor, a mechanical system and the like occur in the vertical roll, the roll gap of the vertical roll is automatically opened until the width value of the intermediate billet and the gap value are added, so that the vertical roll realizes the function of a side guide plate, and the intermediate billet to be rolled is guided into a finishing mill and is continuously rolled. The invention provides an automatic idle-passing method