A bulging compensation roller for a compacting section of a continuous casting machine

Abstract

The utility model relates to continuous casting production technical field, concretely relates to a kind of continuous-casting machine close row section bulge compensation roller, including roll axle and the roller body of sleeve joint on the roll axle, the roller body is integrally formed overall structure, the outer surface of the roller body constitutes a smooth composite surface, the composite surface includes the counteracting section for eliminating bulge in middle part, and the transition section of smooth connection in the both ends of the counteracting section;The counteracting section is straight roll structure, gentle R angle is equipped on the transition section, the both ends of the counteracting section are arc smooth connection by the gentle R angle on the transition section, and the diameter of the counteracting section, greater than the diameter of other part except the counteracting section junction on the transition section, there is a preset fixed difference between the diameter D1 of the counteracting section and the minimum diameter D2 of the transition section. Therefore, provide a kind of continuous-casting machine close row section bulge compensation roller to solve the problem of cast blank bulge deformation in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of continuous casting production technology, and in particular to a bulging compensation roller for continuous casting secret section. Background Technology

[0002] In continuous casting steel production, the billet enters the close-packing section after secondary cooling. Due to the static pressure of the molten steel inside the billet, it is prone to bulging deformation, a phenomenon known as "bulging." This bulging not only affects the dimensional accuracy of the billet but can also lead to serious quality defects such as center segregation and internal cracks.

[0003] To address the adverse effects of bulging on cast billets, the art typically involves increasing the number of support rollers and shortening the span between two support points to reduce bulging. However, this increases equipment weight and production costs. Another approach uses segmented rollers to eliminate bulging, compensating for the bulging amount through flexible adjustment of different roller segments. However, gaps between the segments can create new problems on the billet surface. Therefore, this paper proposes a continuous casting precision segmented bulging compensation roller to solve the problem of bulging deformation in cast billets existing in the prior art. Utility Model Content

[0004] The purpose of this invention is to provide a bulging compensation roller for continuous casting compaction sections, so as to solve the problem of bulging deformation of the cast billet in the prior art.

[0005] The technical solution of this utility model is: a bulging compensation roller for a continuous casting precision section, comprising a roller shaft and a roller body sleeved on the roller shaft. The roller body is an integrally formed structure, and the outer surface of the roller body forms a smooth composite curved surface. The composite curved surface includes a middle offset section for eliminating bulging, and a transition section smoothly connected to both ends of the offset section. The offset section is a straight roller structure, and the transition section has a gentle R-angle. The transition section is smoothly connected to both ends of the offset section in an arc shape through the gentle R-angle. The diameter of the offset section is larger than the diameter of other parts of the transition section except for the connection with the offset section.

[0006] Preferably, there is a preset fixed difference between the diameter D1 of the offsetting section and the minimum diameter D2 of the transition section. This difference enables the offsetting section to pre-compensate for the bulging deformation of the billet, thereby offsetting the bulging deformation of the billet caused by the static pressure of molten steel during solidification.

[0007] Preferably, the rollers are configured to accommodate the wide, narrow, or multi-faceted bulging of the cast billet, and are arranged in one or more groups.

[0008] Preferably, both ends of the roller shaft are fixedly connected to the frame of the continuous casting machine through connecting components, and the roller body rotates around the roller shaft under the friction force of the cast billet.

[0009] Preferably, a connecting beam can be provided between adjacent rollers, with both ends of the connecting beam fixedly connected to the ends of the two adjacent rollers respectively. The connecting beam is directly or indirectly fixed to the internal frame of the continuous casting machine, thereby fixing the rollers.

[0010] Preferably, in the continuous casting press section, a plurality of rollers are arranged along the conveying direction of the billet to continuously compensate for the bulging deformation of the billet.

[0011] Compared with the prior art, the advantages of this utility model are: (1) By setting a preset bulging amount relative to the transition section on the offset section, a reverse pressure that is opposite in direction and matches in size to the bulging deformation caused by the static pressure of molten steel can be applied to the billet, generating a "pre-compensation" mechanism, controlling the final deformation of the billet after leaving the roller within the preset qualified range, thereby effectively eliminating the bulging phenomenon. (2) By setting up an integrally formed roller body and using a gentle R angle to smoothly connect the offset section and the transition section in an arc shape, the integrally formed design not only eliminates the gaps caused by assembly gaps or thermal deformation of the segmented combined rollers, avoiding the marks on the billet, but also avoids stress concentration at the curvature change point, preventing shearing action on the billet shell that has not yet fully solidified, which would cause surface tearing or internal cracking, effectively improving the yield of the billet. (3) By setting up one or more sets of rollers and selectively arranging them on the wide, narrow or multiple sides of the billet according to actual needs, the bulging control effect in the key area is guaranteed, and the equipment manufacturing and maintenance costs are reduced. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the bulging compensation roller described in this utility model; Figure 2 This utility model Figure 1 Enlarged view of region A in the middle; Figure 3 This is a schematic diagram of one distribution method of the roller body described in this utility model; Figure 4 This is a schematic diagram of one connection method of the roller shaft described in this utility model; Figure 5 This is a schematic diagram showing the distribution of the bulging compensating rollers of this utility model in the densely packed section; Figure 6 This is a schematic diagram of another distribution method of the roller body described in this utility model; Among them: 1. Roller shaft; 2. Roller body; 21. Offsetting section; 22. Transition section; 222. Gentle R-angle; 3. Cast billet; 4. Connecting beam; 5. Closely spaced section. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to specific embodiments: like Figures 1 to 6 As shown, a bulging compensation roller for a continuous casting section includes a roller shaft 1 and a roller body 2 sleeved on the roller shaft 1. This compensation roller is applied to the starting position of the arc section of continuous casting, at which time the billet 3 is in the initial stage of solidification.

[0014] The roller body 2 is a one-piece molded structure. The outer surface of the roller body 2 forms a smooth composite curved surface, which includes a central offset section 21 for eliminating bulging, and transition sections 22 smoothly connecting the two ends of the offset section 21. The one-piece molding design of the roller body 2 ensures the continuity and smoothness of the working surface of the roller body 2, and eliminates the possibility of gaps between the sections of the segmented roller causing indentations or damage to the surface of the casting billet 3, thereby effectively improving the yield of the casting billet 3.

[0015] like Figure 1 and Figure 2 As shown, the offset section 21 is a straight roller structure, and the transition section 22 is provided with a gentle R angle 222. The transition section 22 is smoothly connected to both ends of the offset section 21 in an arc shape through the gentle R angle 222. The diameter of the offset section 21 is larger than the diameter of other parts of the transition section 22 except for the connection with the offset section 21. The outer surface of the roller body 2 forms a smooth composite curved surface.

[0016] The gentle radius of curvature 222 is a large radius of curvature. If a sharp corner or a small rounded corner is used between the offsetting section 21 and the transition section 22, a stress concentration point will be formed at the abrupt change in curvature. When the billet 3 contacts and passes over the surface of the roller 2, this stress concentration point will exert a shearing effect on the not-yet-fully-solidified billet shell, which may lead to tearing of the billet shell or internal cracks. However, by using a gentle radius of curvature 222 to smoothly connect the offsetting section 21 and the transition section 22, it is beneficial to achieve the bulging effect while improving the protection of the surface of the billet 3 and avoiding stress concentration from affecting the quality of the billet 3.

[0017] There is a preset fixed difference between the diameter D1 of the offsetting section 21 and the minimum diameter D2 of the transition section 22. This difference allows the offsetting section 21 to pre-compensate for the bulging deformation of the billet 3, thereby offsetting the bulging deformation caused by the static pressure of the molten steel during solidification, and ensuring that the deformation of the billet 3 after bulging is eliminated is within the preset acceptable range. The calculation process of the bulging amount of the offsetting section 21 relative to the transition section 22 comprehensively considers factors such as steel grade, casting temperature, casting speed, cooling intensity, width and thickness of the billet 3, and makes adjustments based on test results, ultimately controlling the deformation of the formed billet 3 within the preset acceptable range.

[0018] like Figure 3 and Figure 6 As shown, based on the cross-sectional shape of the billet 3 and the actual bulging deformation, the rollers 2 are configured to accommodate one or more sets of bulging on the wide, narrow, or multi-faceted surfaces of the billet 3. Targeted compensation is provided for the severely bulged surfaces of the billet 3, rather than compensating all four sides of the billet 3 cross-section. This approach helps ensure the production quality of the billet 3 while reducing equipment costs.

[0019] Both ends of the roller shaft 1 are fixedly connected to the frame of the continuous casting machine through connecting components, and the roller body 2 rotates around the roller shaft 1 under the friction force of the cast billet 3.

[0020] like Figure 4 As shown, a connecting beam 4 can be installed between adjacent rollers 1. The two ends of the connecting beam 4 are fixedly connected to the ends of the two adjacent rollers 1. The connecting beam 4 is directly or indirectly fixed to the internal frame of the continuous casting machine, thereby fixing the rollers 1. This allows multiple independent rollers 1 to be connected in series by the connecting beam 4, forming an integral frame structure. By simply fixing at least one connecting beam 4 directly or indirectly to the internal frame of the continuous casting machine, the entire structure consisting of multiple rollers 1 can be stably positioned inside the die casting machine. During installation and maintenance, there is no need to align and fix each roller 1 individually; only the entire frame unit needs to be assembled and positioned as a whole, effectively simplifying the installation process.

[0021] like Figure 5 As shown, according to actual needs, several rollers 2 are arranged along the conveying direction of the billet 3 in the continuous casting secret section 5 to continuously compensate for the bulging deformation of the billet 3, thereby achieving the best bulging compensation effect.

[0022] Working principle: During continuous casting, the high-temperature billet 3 is drawn into the close-packing section 5. At this point, the billet shell of billet 3 has not yet completely solidified, and the interior is still liquid steel. The static pressure of the molten steel causes the billet shell to bulge outward, resulting in a bulging deformation. The billet 3 is drawn into contact with and passes through the roller body 2. The counteracting section 21 applies a pressure to the billet 3 in the opposite direction to the bulging deformation, achieving "pre-compensation" for the bulging. That is, the billet 3 is pre-pressed into a small reverse deformation. When the billet 3 leaves the roller, its internal stress is released, and it eventually returns to a flat or predetermined shape. Throughout the process, because the surface of the roller body 2 is continuous and smooth, and the pressure distribution is uniform, the surface quality and internal structure of the billet 3 are effectively protected, avoiding defects in the billet 3 caused by roller factors.

[0023] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A CCM withdrawal segment bow compensator characterized by: It includes a roller shaft (1) and a roller body (2) sleeved on the roller shaft (1). The roller body (2) is an integrally formed structure. The outer surface of the roller body (2) forms a smooth composite surface. The composite surface includes a counteracting section (21) in the middle for eliminating bulging, and a transition section (22) smoothly connected to both ends of the counteracting section (21). The offset section (21) is a straight roller structure, and the transition section (22) is provided with a gentle R angle (222). The transition section (22) is smoothly connected to both ends of the offset section (21) in an arc shape through the gentle R angle (222). The diameter of the offset section (21) is larger than the diameter of other parts of the transition section (22) except for the connection with the offset section (21).

2. A camber compensation roll for a compacted segment of a continuous caster as defined in claim 1, characterized in that: There is a preset fixed difference between the diameter D1 of the offset section (21) and the minimum diameter D2 of the transition section (22). This difference enables the offset section (21) to pre-compensate for the bulging deformation of the billet (3), thereby offsetting the bulging deformation of the billet (3) caused by the static pressure of molten steel during solidification.

3. A camber compensation roll for a compacted segment of a continuous caster as defined in claim 2, characterized in that: The rollers (2) are configured to accommodate the wide, narrow or multi-faceted bulging of the billet (3) in one or more groups.

4. A camber compensation roll for a compacted segment of a continuous caster as defined in claim 1, wherein: Both ends of the roller shaft (1) are fixedly connected to the frame of the continuous casting machine through connecting components, and the roller body (2) rotates around the roller shaft (1) under the frictional force of the billet (3).

5. A camber compensation roll for a compact strip caster as claimed in claim 4, characterised in that: A connecting beam (4) can be provided between adjacent rollers (1). The two ends of the connecting beam (4) are respectively fixedly connected to the ends of the two adjacent rollers (1). The connecting beam (4) is fixed on the internal frame of the continuous casting machine, thereby fixing the rollers (1).

6. A camber compensation roll for a compact strip caster as defined in claim 2, characterized in that: In the continuous casting secret section (5), several rollers (2) are arranged along the conveying direction of the billet (3) to continuously compensate for the bulging deformation of the billet (3).

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