Controlling method for coil contacting of hot rolling coiling machine unloading trolley

Abstract

The invention relates to a controlling method for coil contacting of a hot rolling coiling machine unloading trolley. The controlling method comprises the following steps that 1), a calibrating procedure is made to calculate the speed of low-speed rising-and-falling and high-speed rising of an unloading trolley; 2), when strip steel is coiled, the unloading trolley firstly pre-rises to a pre-rising position, of 300mm-500mm under the maximum coiling diameter of a coiling machine for waiting; 3) when the time that the strip steel tail reaches the coiling machine is less than the time required bythe unloading trolley rising from the pre-rising position to contact a steel coil at a low speed, the unloading trolley rises in a low speed to contact the steel coil; and 4), after the steel coil contacts with the unloading trolley and is discharged from the coiling machine, the unloading trolley falls down at a low speed, when the time that the unloading trolley falls down is more than the timethat the unloading trolley from the coil contacting position reaches to a coil unloading fixing beam, the unloading trolley returns to the lowest position at a high speed, and all unloading actions are completed. According to the controlling method, the unloading trolley can stably connect with the steel coil, and the accident rate is reduced.

Description

technical field [0001] The invention relates to the field of steel rolling, in particular to a control method for coil unloading by a trolley of a hot rolling coiler. Background technique [0002] When the hot-rolled coiler rolls to the tail of the strip, the coil unloading trolley needs to be raised in advance, and when the tail of the strip enters the coiler, it must be pushed against the steel coil. After the tail of the coiler is positioned, the trolley unloads the coil from the coiler. The known trolley coil connection method process method of each steel mill at home and abroad is all identical. All the trolleys are pre-raised to a position close to the final coil diameter of the steel coil to wait. After the tail of the steel plate reaches a certain position, the trolley rises to pick up the coil. There are two known methods for judging the lifting height of the trolley, one is to use a magnetic ruler to detect, and the other is to use a flow sensor to calculate the ...

AI Technical Summary

Problems solved by technology

The existing control methods all have the phenomenon that the pre-lift position is given wrongly, the jacking roll causes accidents, the environment is bad, or the quality of the detection element is not good and the damage causes accidents.

Images