Control method for reducing length of surface scratch caused by coiling machine auxiliary coiling device on aluminum strip

Abstract

The invention provides a control method for reducing the length of surface scratch caused by a coiling machine auxiliary coiling device on an aluminum strip, and belongs to the technical field of nonferrous metal processing. According to the method, when a finish rolling unit begins rolling, the threading rolling is carried out at a relatively high threading speed; when the aluminum strip head portion enters a last housing rolling mill to generate a biting signal, the position of the aluminum strip head portion is tracked; when the tracking position of the aluminum strip head portion is largerthan the head speed reduction position, the finish rolling unit starts to decrease the speed to the coiling speed; and when the aluminum strip enters a coiling machine and the tension is establishedbetween the coiling machine and the last housing rolling mill, the coiling machine auxiliary coiling device is started, after a swinging arm of the coiling machine auxiliary coiling device is opened,the finish rolling unit starts to rise to the rolling speed, and then the follow-up steady-state rolling is carried out. According to the method, the length of the scratch caused by contact between the auxiliary coiling device and the surface of the aluminum strip in the head auxiliary coiling process can be effectively reduced, the yield of the product is improved, meanwhile, a high-speed threading and head low-speed coiling control method is adopted, so that the production efficiency is ensured while the yield is ensured.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal processing, in particular to a control method for reducing the scratch length of an aluminum strip surface by a coiler of a coiler. Background technique [0002] Coiling is an important link in the continuous aluminum hot rolling process. After continuous rolling by the finishing mill, the aluminum strip is coiled into coils by the coiler. The aluminum hot rolling coiler uses a coiler to assist the coiling of the head of the aluminum strip. The coiler is generally composed of a coiling frame, a swing arm device, a tensioning device and a coiling belt. When coiling is required, the auxiliary winding frame moves in, so that the auxiliary winding belt is close to the coiler, the swing arm device is closed and the tensioning device tensions the auxiliary winding belt, so that the auxiliary winding belt is tightly wrapped on the reel of the coiler. After the head of the aluminum strip enters...

AI Technical Summary

Problems solved by technology

In the first method, when the winding time of the winding aid is constant, the lower threading speed will reduce the contact length between the winding aid tape and the aluminum strip, thereby reducing the length of scratches, but this method reduces production efficiency At the same time, the lower threading speed also leads to the instability of threading and rolling, which easily leads to the failure of threading, and also has a bad influence on the shape and thickness of the aluminum strip head.

The second method is to speed up the operation speed of the mechanical equipment of the winding aid. The faster the operating speed of the winding aid, the shorter the contact time between the winding aid belt and the aluminum strip, thereby reducing the length of the scratch, but it is limited by the capacity of the mechanical equipment , can not further shorten the equipment action time, the effect is not ideal for reducing the length of scratches

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