Intelligent cutting and sizing method for continuous casting billet

Abstract

The invention relates to an intelligent cutting and sizing method for a continuous casting billet. The intelligent cutting and sizing method comprises the following steps that S1, the end face position of the casting billet is shot through a visible light camera; S2, a picture labeling training neural network is used to determine the approximate position of the end face of the casting billet in an image shot by the visible light camera; S3, the accurate position of the end face edge of the casting billet is determined through a color edge detection method; S4, a fixed-length detection value delay error caused by detection delay is compensated; S5, edge position points of the end face of the casting billet is corrected; S6, the corresponding relation between the fixed-length detection value in the image and the edge position point of the end face of the casting billet is initialized; S7, the cutting precision of the casting billet is optimized; and S8, during non-tail blank production, monitoring and redundant standby are carried out on the online fixed-length detection value by using the speed integral of the throwing machine. The method overcomes the defects of a traditional infrared cutting and sizing method and has the advantages of being high in precision and low in cost.

Description

technical field [0001] The invention relates to the field of steelmaking, in particular to a method for intelligently cutting and measuring continuous casting slabs. Background technique [0002] The molten steel smelted in the steelmaking plant is continuously cast into slabs by continuous casting machines, and the slabs are cut into slabs of a certain length according to the needs of the next process. The length of the finished billet requires on-line sizing detection and cutting. The former is to obtain the online length of the billet flow end face position relative to the starting cutting point of the flame cutting machine through the integral calculation of the speed of the casting machine after the continuous casting machine or the imaging recognition technology as the online detection length of the billet. The latter is to start the flame cutting machine to clamp and cut the billet flow synchronously when the online detection length of the billet reaches the required...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of calculating the billet online sizing value through the integral of the speed of the casting machine after the continuous casting machine are that, firstly, when there is slippage between the drawing machine and the slab flow, the accuracy of the billet sizing value will be low; At this time, since the billet flow has been out of contact with the billet drawing machine, it will not be possible to calculate the fixed length value of the billet through the speed integration of the billet drawing machine. Tail blanks are processed manually by the station

There are five problems in the manual cut-to-length billet: first, the qualified rate of cut-to-length is low, the highest is only 70%; second, the long-term burning of gas is a serious waste; third, the billet conveying roller after cutting is seriously damaged and replaced frequently ; The fourth is that the motors of the first and second groups of billet conveying rollers are seriously damaged due to excessive slag accumulation on the rollers; fifth, the labor intensity of cutting workers is high and the labor productivity is low

Although this method can also obtain the fixed-length value of the billet when producing the tail billet, it is only suitable for the working condition where the surface temperature of the continuous casting billet is high enough. In the condition of low temperature on the surface of the continuous casting slab, this traditional infrared sizing method will not continue to be used

[0005] Due to the large cross-section of the continuous casting slab or the low temperature of the continuous casting slab caused by the distance between the flame cutting machine and the continuous casting machine, it is impossible to use the traditional infrared sizing method to measure the slab online. However, if only the casting machine speed integral calculation is used When billet is cut to length online, the accuracy of billet cut to length will be low and it is impossible to use this method to calculate billet’s online cut to length when producing tail blanks

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