Continuous casting machine crystallizer narrow face foot roller installation structure capable of effectively improving slab type

Abstract

The utility model discloses a continuous casting machine crystallizer narrow-face foot roll installation structure capable of effectively improving a slab type. The continuous casting machine crystallizer narrow-face foot roll installation structure comprises a crystallizer. First foot rollers, second foot rollers, third foot rollers and fourth foot rollers which are symmetrically distributed left and right are sequentially arranged at the lower end of the narrow face of the crystallizer from top to bottom, the lower opening distance between the two first foot rollers is 1288.2 mm, the lower opening distance between the two second foot rollers is 1286.6 mm, the lower opening distance between the two third foot rollers is 1284.9 mm, the lower opening distance between the two fourth foot rollers is 1283.3 mm, and the lower opening distance between the two fourth foot rollers is 1283.3 mm. The arc-to-arc gap of the first foot roller is adjusted to be-0.1 mm, the arc-to-arc gap of the second foot roller is adjusted to be-0.4 mm, the arc-to-arc gap of the third foot roller is adjusted to be-0.8 mm, and the arc-to-arc gap of the fourth foot roller is adjusted to be-1.2 mm. According to the continuous casting machine crystallizer narrow face foot roller installation structure capable of effectively improving the plate blank type, the arc-to-arc mode and the stacked ring pre-tightening mode of the crystallizer are adjusted, and therefore the plate blank type can be effectively improved. The blank type of the casting blank is effectively improved, and the rolling quality of the casting blank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of the installation form of narrow-side foot rolls of a slab continuous casting machine, and specifically relates to an installation structure of narrow-side foot rolls of a continuous casting machine crystallizer for effectively improving the slab shape. Background Technique

[0002] Slab continuous casting is a continuous steelmaking and ironmaking technology with slabs as the main products. A slab with a width-thickness ratio greater than 3 is called a slab. Continuously cast rolled steel slabs are mainly used for rolling flat plates (thick plates, medium plates, thin plates, strip coils). The billet shell initially formed in the slab crystallizer continuous casting is relatively thin, and the molten steel in the billet shell has not completely solidified. The cross-section of the billet is prone to deformation and requires the rolling support and guidance of wide-side foot rolls and narrow-side foot rolls to ensure the cross-section forming of the billet.

[0003] Since the converter plant was put into production, scratches and pits often exist on the narrow side of the billet, which cause quality defects such as edge peeling or black lines in the billet during the rolling process. After analysis, in addition to being caused by the production process, the scratches and pits on the narrow side are greatly related to the arc alignment and the pre-tightening force of the overlapping rings of the narrow-side foot rolls of the crystallizer. Therefore, we propose an installation structure of narrow-side foot rolls of a continuous casting machine crystallizer for effectively improving the slab shape. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the existing defects, provide an installation structure of narrow-side foot rolls of a continuous casting machine crystallizer for effectively improving the slab shape, adjust the arc alignment method and the overlapping ring pre-tightening method of the narrow-side foot rolls of the crystallizer, effectively improve the slab shape of the billet, and improve the rolling quality of the billet, and can effectively solve the problems in the background technique.

[0005] To achieve the above object, the utility model provides the following technical solution: an installation structure of narrow-side foot rolls of a continuous casting machine crystallizer for effectively improving the slab shape, including a crystallizer;

[0006] Crystallizer: The lower end of its narrow side is successively provided with a first foot roll, a second foot roll, a third foot roll and a fourth foot roll which are symmetrically distributed left and right from top to bottom. The lower mouth spacing between two first foot rolls is 1288.2 mm, the lower mouth spacing between two second foot rolls is 1286.6 mm, the lower mouth spacing between two third foot rolls is 1284.9 mm, and the lower mouth spacing between two fourth foot rolls is 1283.3 mm. By adjusting the arc alignment method and the overlapping ring pre-tightening method of the narrow-side foot rolls of the crystallizer, the slab shape of the billet is effectively improved, and the rolling quality of the billet is improved.

[0007] Furthermore, the arc alignment gap of the first foot roll is adjusted to -0.1 mm, the arc alignment gap of the second foot roll is adjusted to -0.4 mm, the arc alignment gap of the third foot roll is adjusted to -0.8 mm, and the arc alignment gap of the fourth foot roll is adjusted to -1.2 mm to optimize the arc alignment gap of the narrow-side foot rolls of the crystallizer.

[0008] Further, the lower orifice spacing of the narrow face of the mold at the upper end of the first bottom roll is 1290 mm, optimizing the narrow face of the mold.

[0009] Further, the installation distance of the disc spring of the first bottom roll is 30.5 mm, the installation distance of the disc spring of the second bottom roll is 30 mm, the installation distance of the disc spring of the third bottom roll is 30 mm, and the installation distance of the disc spring of the fourth bottom roll is 30 mm, optimizing the pre-tightening method of the stacked rings.

[0010] Compared with the prior art, the beneficial effects of the present utility model are: The installation structure of the narrow face bottom roll of the continuous casting machine mold of the present utility model effectively improves the slab shape, having the following advantages:

[0011] Adjust the assembly spacing of each narrow face bottom roll respectively. Taking a section of 1280 mm and a taper of 6.5° as an example, the lower orifice spacing between the two first bottom rolls is reduced from 1298.0 mm to 1288.2 mm, the lower orifice spacing between the two second bottom rolls is reduced from 1291.0 mm to 1286.6 mm, the lower orifice spacing between the two third bottom rolls is increased from 1283.9 mm to 1284.9 mm, and the lower orifice spacing between the two fourth bottom rolls is increased from 1276.9 mm to 1283.3 mm. The alignment gap of the first bottom roll is adjusted to -0.1 mm, the alignment gap of the second bottom roll is adjusted to -0.4 mm, the alignment gap of the third bottom roll is adjusted to -0.8 mm, and the alignment gap of the fourth bottom roll is adjusted to -1.2 mm. The lower orifice spacing of the narrow face of the mold at the upper end of the first bottom roll is reduced from 1303 mm to 1290 mm, optimizing the arc alignment method of the narrow face bottom roll of the mold. At the same time, the pre-tightening force and installation distance of the disc spring of the first bottom roll are set as: 2.5 mm, pre-tightening force 974 N, disc spring installation distance 30.5 mm, the pre-tightening force and installation distance of the disc spring of the second bottom roll are set as: 3 mm, pre-tightening force 1169 N, disc spring installation distance 30 mm, the pre-tightening force and installation distance of the disc spring of the third bottom roll are set as: 3 mm, pre-tightening force 1169 N, disc spring installation distance 30 mm, and the pre-tightening force and installation distance of the disc spring of the fourth bottom roll are set as: 3 mm, pre-tightening force 1169 N, disc spring installation distance 30 mm, optimizing the pre-tightening method of the stacked rings. By adjusting the spacing of the arc alignment of the narrow face bottom roll of the mold, the arc alignment gap of the narrow face bottom roll, and the pre-tightening force and installation distance of the disc spring, the slab shape of the cast billet is effectively improved, the rolling quality of the cast billet is improved, and the effect is good. After the arc alignment and stacked ring pre-tightening adjustment, there are no scratches and pits on the narrow face of the cast billet, the fulfillment rate of special steel grades is improved, and the production quality is significantly improved. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the present utility model.

[0013] In the figure: 1 first bottom roll, 2 second bottom roll, 3 third bottom roll, 4 fourth bottom roll, 5 mold. Specific embodiments

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0015] Please refer to Figure 1 , this embodiment provides a technical solution: an installation structure of narrow-side bottom rolls of a continuous casting machine mold for effectively improving the slab shape, including a mold 5;

[0016] Mold 5: The lower end of its narrow side is successively provided with a first bottom roll 1, a second bottom roll 2, a third bottom roll 3, and a fourth bottom roll 4 that are symmetrically distributed left and right from top to bottom. The lower mouth spacing between the two first bottom rolls 1 is 1288.2 mm, the lower mouth spacing between the two second bottom rolls 2 is 1286.6 mm, the lower mouth spacing between the two third bottom rolls 3 is 1284.9 mm, and the lower mouth spacing between the two fourth bottom rolls 4 is 1283.3 mm. The alignment gap of the first bottom roll 1 is adjusted to -0.1 mm, the alignment gap of the second bottom roll 2 is adjusted to -0.4 mm, the alignment gap of the third bottom roll 3 is adjusted to -0.8 mm, and the alignment gap of the fourth bottom roll 4 is adjusted to -1.2 mm. The lower mouth spacing of the narrow side of the mold 5 above the first bottom roll 1 is 1290 mm. The assembly spacing of each narrow-side bottom roll is adjusted respectively. Taking a cross-section of 1280 mm and a taper of 6.5° as an example, the lower mouth spacing between the two first bottom rolls 1 is reduced from 1298.0 mm to 1288.2 mm, the lower mouth spacing between the two second bottom rolls 2 is reduced from 1291.0 mm to 1286.6 mm, the lower mouth spacing between the two third bottom rolls 3 is increased from 1283.9 mm to 1284.9 mm, the lower mouth spacing between the two fourth bottom rolls 4 is increased from 1276.9 mm to 1283.3 mm, the alignment gap of the first bottom roll 1 is adjusted to -0.1 mm, the alignment gap of the second bottom roll 2 is adjusted to -0.4 mm, the alignment gap of the third bottom roll 3 is adjusted to -0.8 mm, and the alignment gap of the fourth bottom roll 4 is adjusted to -1.2 mm. The lower mouth spacing of the narrow side of the mold 5 above the first bottom roll 1 is reduced from 1303 mm to 1290 mm, and the alignment method of the narrow-side bottom rolls of the mold is optimized;

[0017] The installation distance of the disc spring of the first bottom roll 1 is 30.5 mm, the installation distance of the disc spring of the second bottom roll 2 is 30 mm, the installation distance of the disc spring of the third bottom roll 3 is 30 mm, the installation distance of the disc spring of the fourth bottom roll 4 is 30 mm. The pre-tightening force and installation distance of the disc spring of the first bottom roll 1 are set as: 2.5 mm, pre-tightening force 974 N, disc spring installation distance 30.5 mm; the pre-tightening force and installation distance of the disc spring of the second bottom roll 2 are set as: 3 mm, pre-tightening force 1169 N, disc spring installation distance 30 mm; the pre-tightening force and installation distance of the disc spring of the third bottom roll 3 are set as: 3 mm, pre-tightening force 1169 N, disc spring installation distance 30 mm; the pre-tightening force and installation distance of the disc spring of the fourth bottom roll 4 are set as: 3 mm, pre-tightening force 1169 N, disc spring installation distance 30 mm. The pre-tightening method of the laminated ring is optimized.

[0018] The working principle of the installation structure of the narrow face bottom rolls of the continuous casting mold provided by the present utility model, which can effectively improve the slab shape, is as follows: The assembly spacing of each narrow face bottom roll is adjusted respectively. Taking a cross-section of 1280 mm and a taper of 6.5° as an example, the lower mouth spacing between the two first bottom rolls 1 is reduced from 1298.0 mm to 1288.2 mm, the lower mouth spacing between the two second bottom rolls 2 is reduced from 1291.0 mm to 1286.6 mm, the lower mouth spacing between the two third bottom rolls 3 is increased from 1283.9 mm to 1284.9 mm, the lower mouth spacing between the two fourth bottom rolls 4 is increased from 1276.9 mm to 1283.3 mm. The arc alignment gap of the first bottom roll 1 is adjusted to -0.1 mm, the arc alignment gap of the second bottom roll 2 is adjusted to -0.4 mm, the arc alignment gap of the third bottom roll 3 is adjusted to -0.8 mm, and the arc alignment gap of the fourth bottom roll 4 is adjusted to -1.2 mm. The lower mouth spacing of the narrow face of the mold 5 at the upper end of the first bottom roll 1 is reduced from 1303 mm to 1290 mm. The arc alignment method of the narrow face bottom rolls of the mold is optimized. At the same time, the pre-tightening force and installation distance of the disc spring of the first bottom roll 1 are set as: 2.5 mm, pre-tightening force 974 N, disc spring installation distance 30.5 mm; the pre-tightening force and installation distance of the disc spring of the second bottom roll 2 are set as: 3 mm, pre-tightening force 1169 N, disc spring installation distance 30 mm; the pre-tightening force and installation distance of the disc spring of the third bottom roll 3 are set as: 3 mm, pre-tightening force 1169 N, disc spring installation distance 30 mm; the pre-tightening force and installation distance of the disc spring of the fourth bottom roll 4 are set as: 3 mm, pre-tightening force 1169 N, disc spring installation distance 30 mm. The pre-tightening method of the laminated ring is optimized.

[0019] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. An installation structure of narrow-side supporting rolls of a continuous casting mold for effectively improving the slab shape, characterized in that: including a mold (5); Mold (5): At the lower end of its narrow face, there are symmetrically distributed first pinch rolls (1), second pinch rolls (2), third pinch rolls (3), and fourth pinch rolls (4) from top to bottom. The lower mouth spacing between two first pinch rolls (1) is 1288.2 mm, the lower mouth spacing between two second pinch rolls (2) is 1286.6 mm, the lower mouth spacing between two third pinch rolls (3) is 1284.9 mm, and the lower mouth spacing between two fourth pinch rolls (4) is 1283.3 mm.

2. The installation structure of the narrow-side supporting rolls of the continuous casting mold for effectively improving the slab shape according to claim 1, wherein: The alignment gap of the first pinch roll (1) is adjusted to -0.1 mm, the alignment gap of the second pinch roll (2) is adjusted to -0.4 mm, the alignment gap of the third pinch roll (3) is adjusted to -0.8 mm, and the alignment gap of the fourth pinch roll (4) is adjusted to -1.2 mm.

3. The installation structure of the narrow-side foot rolls of the continuous casting mold for effectively improving the slab shape according to claim 1, characterized in that: The lower mouth spacing of the narrow face of the mold (5) above the first pinch roll (1) is 1290 mm.

4. The installation structure of the narrow-side foot rolls of the continuous casting mold for effectively improving the slab shape according to claim 1, wherein: The installation distance of the disc spring of the first pinch roll (1) is 30.5 mm, the installation distance of the disc spring of the second pinch roll (2) is 30 mm, the installation distance of the disc spring of the third pinch roll (3) is 30 mm, and the installation distance of the disc spring of the fourth pinch roll (4) is 30 mm.

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