Method for controlling edge cracking of strip steel through crystallization roller shape
A technology for controlling strips and crystal rolls, applied in the direction of rolling mill control devices, metal rolling, manufacturing tools, etc.
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Embodiment 1
[0031] In embodiment 1, it is determined that the length of the strip edge crack along the width direction of the strip is 50 mm, and the length of the roll profile of the crystallization roll side that needs to be modified is determined to be 90 mm; 1 point is taken at a distance of every 10 mm, and the original crystallization roll The edge roll shape curve is discretized and taken within the range of 90mm edge length to obtain the discretized original roll shape value S 0 , S 1 , S 2 ... S 9 ; At the same time obtain the edge thickness value H of the cast strip within the same length range 0 、H 1 、H 2 ......H 9 and strip thickness value h 0 、h 1 、h 2 ... h 9 ; Obtain the thickness of the cast strip at the central position of the strip width and the thickness of the rolled strip to be 1.758mm and 0.9mm, and calculate the thickness reduction ratio at the central position to be 48.8%; R i value and s i The value of is shown in Table 1, and according to the original ...
Embodiment 2
[0035] In embodiment 2, it is determined that the length of the strip edge crack along the width direction of the strip is 35mm, and the length of the roll profile of the crystallization roll that needs to be modified is determined to be 70mm; get 1 point at a distance of every 7mm, and the original crystallization roll The edge roll shape curve is discretized and taken within the range of 70mm edge length to obtain the discretized original roll shape value S 0 , S 1 , S 2 ... S 10 ; At the same time obtain the edge thickness value H of the cast strip within the same length range 0 、H 1 、H 2 ......H 10 and strip thickness value h 0 、h 1 、h 2 ... h 10 ; Obtain the thickness of the cast strip at the central position of the strip width and the thickness of the rolled strip to be 1.8mm and 1.2mm, and calculate the thickness reduction ratio at the central position to be 33.3%; R i value and s i The value of is shown in Table 1, and according to the original roll shape an...
Embodiment 3
[0040]In embodiment 3, it is determined that the length of the strip edge crack along the width direction of the strip is 15mm, and the length of the roll shape of the crystallization roll side that needs to be modified is determined to be 20mm; 1 point is taken at a distance of every 5mm, and the original crystallization roll The edge roll shape curve is discretized and taken within the range of 20mm edge length to obtain the discretized original roll shape value S 0 , S 1 , S 2 ... S 4 ; At the same time obtain the edge thickness value H of the cast strip within the same length range 0 、H 1 、H 2 ......H 4 and strip thickness value h 0 、h 1 、h 2 ... h 4 ; Obtain the thickness of the cast strip at the central position of the strip width and the thickness of the rolled strip to be 1.75mm and 0.8mm, and calculate the thickness reduction ratio at the central position to be 54.2%; R i value and s i The value of is shown in Table 1, and according to the original roll sha...
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