Coiler wrapper roller ladder-speed control method and control system thereof

Abstract

The invention provides a coiler wrapper roller ladder-speed control method and a control system thereof, and relates to special control equipment or a method for metal rolling machines or processing products thereof so as to real-timely achieve the hardness, the thickness and the coiling temperature of a strip steel. According to the present invention, the speed advancing rate adjustment parameter is determined according to the following judgment conditions that: (1) the speed advancing rate adjustment parameter is increased if the hardness of a strip steel is increased, (2) the speed advancing rate adjustment parameter is increased if the thickness of a strip steel is increased, and (3) the speed advancing rate adjustment parameter is decreased if the temperature of a strip steel is increased; and according to the speed advancing rate adjustment parameter, the advancing rates of the first wrapper roller, the second wrapper roller and the third wrapper roller are calculated, and the speeds of the first wrapper roller, the second wrapper roller and the third wrapper roller are controlled according to the advancing rates of various wrapper rollers to form the stably and progressively increased ladder speed so as to reduce the problems of inner ring bruise defects and pulling of the strip steel width into the narrow state of the hot-rolled steel coil, increase the control precision of the coiler, reduce the strip steel coiling defect, and increase the steel rolling product quality.

Description

technical field [0001] The invention relates to a control device or method specially suitable for a metal rolling mill or its processed products, in particular to a stepwise speed control method and a control system for an auxiliary winding roll of a coiler. Background technique [0002] The coiler is an important equipment of the hot rolling production line, which is used to coil the rolled hot strip steel into coils. Such as figure 1 As shown, the coiler 1 is located behind the finish rolling unit 2 and is the last process of the hot continuous rolling production line. see figure 1 , The coiler 1 mainly includes main equipment such as a roller table 11, a side guide plate 12, a pinch roller 13, three auxiliary winding rollers 14, an auxiliary winding roller hydraulic cylinder 15, and a reel 16. Wherein the roller table 11 is mainly responsible for transporting the strip steel 7 from the finish rolling unit to the coiler unit. The main function of the side guide plate 1...

AI Technical Summary

Problems solved by technology

[0010] 1. The lead rate of the roll-assisting roller is too large, resulting in too fast lead, resulting in narrowing of the width of the strip

[0011] In order to ensure that the head of the strip steel is more tightly wound on the reel, it is necessary to further increase the lead rate of the reel and the auxiliary winding roller. Narrow width, especially for thin-gauge steel strips with a thickness of ≤7mm, the phenomenon of narrow width is particularly serious

The main reasons are as follows: For example, if the lead ratios of the pinch roller, reel, and auxiliary roll are set to 1.05, 1.10, and 1.20 respectively, during the steel coiling process, due to the large speed difference between the reel and the auxiliary roll, resulting in excessive tension on the strip, resulting in narrowing of the width (e.g. Figure 4 shown)

[0012] 2. The tension control works late, resulting in insufficient tightness of the inner ring of the hot-rolled steel coil, and serious contusion of the strip head

Since the tension control works after the reel is built up, it does not play a decisive role in the first 10 turns of the strip where the contusion is high.

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