Operating method of cold continuous rolling mill equipment for eliminating start band head coiling

Abstract

The invention discloses an operating method of cold continuous rolling mill equipment for eliminating start band head coiling. Existing cold continuous rolling mill equipment is used, and normal halting, abnormal halting and halting caused by the reasons of equipment maintenance and overhauls and fault treatment and a starting mode after halting are overall improved in the normal rolling process of a cold continuous rolling mill unit. The operating method is characterized by including the steps that the thickness of band steel is changed dynamically before the cold continuous rolling mill unit is halted, manual halting is carried out after a flying shear shears the band steel, the band steel in the cold continuous rolling mill unit retracts to an inlet table pressing plate through an inlet tension roller set, and during starting, the band steel is threaded and sequentially passes a weld joint thickness gauge, the cold continuous rolling mill unit, an outlet thickness gauge and an outlet pinch roller to reach the position between the flying shear and a 1# steering pinch roller; band steel losses generated in an existing cold continuous rolling mill unit halting and starting operating method are eliminated; by means of the operating method, raw material consumption generated during first volume starting of the cold continuous rolling mill unit can be reduced; remarkable economic benefits are achieved.

Description

technical field [0001] The present invention relates to the improvement of the stop and start operation method of common carbon steel strip tandem cold rolling mill. , Strip threading before the tandem cold rolling mill starts up again, input of export equipment, depressing and starting steps of the tandem cold rolling mill, to realize the elimination of the loss of the strip caused by the head coil caused by the shutdown and start-up operation methods of the existing tandem cold rolling mill The device eliminates the method of operation of the boot-leader volume. Background technique [0002] The tandem cold rolling mill has the advantages of large output, good product quality and high yield. It is to connect the pickled steel strip through welding machine punching and welding, and then enter the continuous rolling mill for continuous pressing and rolling to change the thickness of the strip steel. The whole unit is connected as a whole through the tension of the strip ste...

AI Technical Summary

Problems solved by technology

[0011] A. Thickness change process of strip steel 17: After the cold tandem rolling mill 5 starts, the strip 17 runs from the 1# rolling mill of the cold tandem rolling mill 5 to the 5# rolling mill, and the thickness gradually decreases. When the feedback of the exit thickness gauge 6 After the value reaches the target thickness, the pressing process is over. In this process, the thickness of the strip steel is reduced in a slope, from the original thickness to the target thickness, and the thickness difference is large, which does not meet the requirements;

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