Laminar cooling roll of a new construction

Abstract

The utility model discloses a laminar cooling roller of novel structure, it includes roller, two axle head subassembly, every axle head subassembly includes connecting axle, inner web, outer web, and the connecting part of connecting axle and web is big in the middle, and both ends are small, and from inside to outside is divided into axle section I, axle section II, axle section III, and forms outer stop I, outer stop II, the inner hole of inner web cooperates with axle section I, and its outer end surface contacts with outer stop I, and the inner end surface of inner web and the inner end surface of connecting axle between the axial dimension is L1, the inner hole of outer web cooperates with axle section I, and its inner end surface contacts with outer stop II, and the inner end surface of inner web and the outer end surface of outer web between the axial dimension is L2, and the maximum clearance between the inner hole of inner web and axle section I, the inner hole of outer web and axle section III is 0.2mm. The utility model discloses laminar cooling roller satisfies dynamic balance requirement, makes the roller transfer stable, prolongs the life of roller, and guarantees the quality of strip steel.

Description

Technical Field

[0001] This utility model relates to a laminar flow cooling roller used in a hot-rolled strip steel production line, and belongs to the field of machinery. Background Technology

[0002] Laminar flow cooling rollers are used in hot-rolled strip steel production lines, located between the finishing mill and the coiler, and mainly serve to cool the strip steel.

[0003] The laminar flow cooling roller body consists of a roller cylinder and shaft ends at both ends, and its existing structure is as follows: Figure 1-6 As shown, the system includes a roller and a shaft head assembly. The shaft head assembly includes a connecting shaft and inner and outer strip plates. Its disadvantages are: I. Connecting Shaft: 1. The diameter of the connecting section between the connecting shaft and the inner and outer strip plates is the same size, without a stepped surface for axial restraint. When welding the connecting shaft and the inner and outer strip plates, the axial dimensions L1 and L2 are difficult to control. 2. The mating section between the connecting shaft and the strip plates is a non-machined surface. To ensure smooth mating between the inner and outer strip plates and the connecting shaft, there is a large gap of 2mm between the inner holes of the inner and outer strip plates and the diameter of the connecting shaft. If the axial dimensions of the connecting shaft and the inner and outer strip plates cannot be guaranteed, or if the gap is uneven, it will result in a large dynamic balance data for the laminar flow cooling roller. Removing material cannot meet the dynamic balance requirements, affecting the stability of the roller rotation, shortening its service life, and affecting the quality of the strip steel. II. Roller: In the earliest processing steps, the roller has four inner holes machined from the middle inner hole Φ250 towards both ends, namely Φ258H7. mm, Φ262mm, Φ260H7 mm, Φ262mm: The outermost Φ262mm inner hole of the outer plate and the roller needs to be welded later. The weld slag makes it necessary to process this inner hole again. Therefore, the initial roller processing is time-consuming, labor-intensive and wears out the tools. Third, the fit between the shaft head assembly and the roller: Since the roller is generally purchased directly as a seamless steel pipe, the flatness of the stepped surface that contacts the inner plate cannot be guaranteed during turning. In some cases, the step may be almost invisible on one side. In addition, the end face of the inner plate that contacts the roller has a 7×15° chamfer, which is a large bevel. Therefore, the stepped surface of the roller cannot play a positioning role. When the shaft head is put into the roller by heat fitting, it is very likely that the shaft head will be installed to one side, causing the shaft head and the roller to be misaligned. This will result in the shaft head not being machined round and needing to be re-welded. In severe cases, it may even cause the dynamic balance data of the final finished roller to be too large, making it impossible to meet the dynamic balance requirements by reducing the material. In summary, existing laminar flow cooling rollers have the following drawbacks: 1. Poor dynamic balance performance, affecting the stability of roller rotation and thus the quality of strip steel; 2. Poor dynamic balance performance, resulting in uneven force on the roller on the roller table, shortening the roller's lifespan and requiring frequent replacement, and also causing excessive motor load, affecting production line production and thus increasing production costs; 3. Unreasonable number of sections and diameter of the inner hole in the earliest processing step of the roller, prolonging processing time and increasing production costs. Summary of the Invention

[0004] The problem this invention aims to solve is to provide a novel laminar flow cooling roller structure that meets dynamic balance requirements, ensures stable roller transport, extends roller life, and guarantees strip quality. Simultaneously, it shortens processing time and reduces production costs.

[0005] This utility model discloses a novel laminar flow cooling roller, comprising a roller and two shaft end assemblies. The roller has a symmetrical structure, and the two shaft end assemblies are symmetrically arranged and connected to the left and right ends of the inner hole of the roller. The roller is characterized by the following features: each shaft end assembly includes a connecting shaft, an inner plate, and an outer plate. The connection between the connecting shaft and the outer plate is wider in the middle and narrower at both ends, divided into shaft segment I, shaft segment II, and shaft segment III from the inside out, forming outer stop I and outer stop II. The inner hole of the inner plate mates with shaft segment I, and its outer end face contacts outer stop I. The axial dimension between the inner end face of the inner plate and the inner end face of the connecting shaft is L1. The inner hole of the outer plate mates with shaft segment I, and its inner end face contacts outer stop II. The axial dimension between the inner end face of the inner plate and the outer end face of the outer plate is L2. The maximum clearance between the inner hole of the inner plate and shaft segment I, and between the inner hole of the outer plate and shaft segment III, is 0.2 mm.

[0006] Furthermore, roller 1 has a left-right symmetrical structure, and its inner hole gradually increases in size from the middle to both ends, dividing it into cylinder I, cylinder II, cylinder III, cylinder II, and cylinder I, forming two inner stops I and two inner stops II; the outer circle of the inner plate mates with cylinder II, and its inner end face contacts the inner stop II; the outer circle of the outer plate mates with cylinder II, its inner end face mates with the inner stop I, and its outer end face is welded and fixed to cylinder I 11.

[0007] Furthermore, the inner plate and the connecting shaft are connected by welding: one weld is at the fit between the end face of shaft segment I and the inner hole of the inner plate, and the other weld is at the fit between the outer end face of the inner plate and the outer stop I; the outer plate and the connecting shaft are connected by welding: the two welds are at the fit between the inner and outer end faces of shaft segment I and the outer plate, respectively.

[0008] Furthermore, the chamfer C between the inner end face of the inner plate and the outer circle is 1×45°.

[0009] The advantages of this laminar flow cooling roller are: First, it ensures the axial dimension of the connecting shaft and the inner and outer plates during assembly, and also ensures that the gap between the connecting shaft and the inner and outer plates is uniform and concentric, thereby meeting the dynamic balance requirements of the laminar flow cooling roller, making the roller transport stable, extending the roller's life, and ensuring the quality of the strip steel; Second, in the earliest processing steps, only two sizes are processed from the middle hole to both ends of the roller. Under the premise of ensuring smooth assembly of the inner and outer plates, the processing time is shorter, saving time and effort, reducing tool wear, and lowering processing costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of an existing laminar flow cooling roller in the background art.

[0011] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0012] Figure 3 This is a schematic diagram of the roller structure in the background art.

[0013] Figure 4 This is a schematic diagram of the structure of the shaft head assembly in the background art.

[0014] Figure 5 This is a schematic diagram of the inner plate structure in the background art.

[0015] Figure 6 yes Figure 5 Enlarged diagram of point B in the middle.

[0016] Figure 7 This is a schematic diagram of the structure of the laminar flow cooling roller of this utility model.

[0017] Figure 8 yes Figure 7 Enlarged diagram of point C in the middle.

[0018] Figure 9 This is a schematic diagram of the structure of the roller in this utility model.

[0019] Figure 10 This is a structural schematic diagram of the shaft head assembly of this utility model.

[0020] Figure 11 This is a schematic diagram of the connecting shaft in this utility model.

[0021] Figure 12 This is a schematic diagram of the inner plate in this utility model.

[0022] Figure 13 yes Figure 12 Enlarged diagram of point D in the middle. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] from Figure 7 , Figure 10 , Figure 11As can be seen, this utility model discloses a novel laminar flow cooling roller with the following structure: it includes a roller 1 and two shaft end assemblies. The roller 1 has a symmetrical structure, and the two shaft end assemblies are symmetrically arranged and connected to the left and right ends of the inner hole of the roller 1. Each shaft end assembly includes a connecting shaft 2, an inner flange 31, and an outer flange 32. The connection between the connecting shaft 2 and the flange is larger in the middle and smaller at both ends, and is divided into shaft segment I 21, shaft segment II 22, and shaft segment III 23 from the inside out, forming outer stop I 24 and outer stop II 25; the inner flange... The inner hole of the inner plate 31 mates with shaft segment I21, and its outer end face contacts the outer stop I24. The axial dimension between the inner end face of the inner plate 31 and the inner end face of the connecting shaft 2 is L1. The inner hole of the outer plate 32 mates with shaft segment I23, and its inner end face contacts the outer stop II25. The axial dimension between the inner end face of the inner plate 31 and the outer end face of the outer plate 32 is L2. The maximum clearance between the inner hole of the inner plate 31 and shaft segment I21, and between the inner hole of the outer plate 32 and shaft segment III23 is 0.2 mm.

[0026] This utility model relates to a laminar flow cooling roller: the connecting part of the connecting shaft 2 and the inner and outer strips is machined to form outer circles of different diameters. An outer stop is formed to axially position the inner and outer strips, thus ensuring the axial dimensions during assembly of the inner and outer strips with the connecting shaft 2. Simultaneously, due to the machining of the connecting part of the connecting shaft 2, the clearance between the inner holes of the inner and outer strips and the connecting shaft is a minimum of 0.2mm. Therefore, it not only ensures the axial dimensions during assembly of the connecting shaft and the inner and outer strips but also ensures uniform and concentric clearance between the connecting shaft and the inner and outer strips, thereby meeting the dynamic balance requirements of the laminar flow cooling roller, ensuring stable roller transport, extending roller life, and guaranteeing the quality of the strip steel.

[0027] Example 2

[0028] from Figure 7 , Figure 8 , Figure 9 As can be seen, the laminar flow cooling roller of this utility model has the following structure: Roller 1 is a symmetrical structure with its inner hole increasing in size from the middle to both ends, and is divided into cylinder body I11, cylinder body II12, cylinder body III13, cylinder body II12, and cylinder body I11, forming two inner stops I14 and two inner stops II15; the outer circle of the inner plate 31 is fitted with cylinder body II12, and its inner end face is in contact with inner stops II15; the outer circle of the outer plate 32 is fitted with cylinder body II11, its inner end face is fitted with inner stops I14, and its outer end face is welded and fixed to cylinder body I11.

[0029] This utility model: In the earliest processing steps, the roller is only machined to two sizes from the middle hole to both ends: Φ258H7. mm, Φ260H7 mm, under the premise of ensuring smooth assembly of inner and outer plates, 1. the processing time is shorter; 2. there is no need to pre-process the inner holes that need to be processed after welding the outer plates to the rollers, which saves time and effort, reduces tool wear, and lowers processing costs.

[0030] Example 3

[0031] from Figure 7 , Figure 10 As can be seen, the laminar flow cooling roller of this utility model is connected to the inner plate 31 and the connecting shaft 2 by welding: one weld is the mating point between the end face of the shaft segment I21 and the inner hole of the inner plate 31, and the other weld is the mating point between the outer end face of the inner plate 31 and the outer stop I24; the outer plate 32 is connected to the connecting shaft 2 by welding: the two welds are the mating points between the shaft segment I23 and the inner and outer end faces of the outer plate 32, respectively.

[0032] Example 4

[0033] from Figure 7 , Figure 8 , Figure 12 , Figure 13 It can be seen that the chamfer C between the inner end face 311 of the inner plate 31 and the outer circle of the laminar flow cooling roller of this utility model is 1×45°.

[0034] This utility model of laminar flow cooling roller: The chamfer of the inner end face 311 of the inner plate 31 is changed from 7×15° to 1×45°, which increases the radial dimension of the inner end face 311, thereby increasing the contact area between the inner end face 311 and the inner stop II 15. This makes it less likely for the shaft head assembly to tilt during hot fitting, ensuring that the concentricity of the shaft head assembly and the roller head will not deviate, thus meeting the dynamic balance requirements of the laminar flow cooling roller, making the roller transfer stable, extending the roller's life, and ensuring the quality of the strip steel.

[0035] In summary, this novel laminar flow cooling roller meets dynamic balance requirements, ensuring stable roller transport, extending roller life, and guaranteeing strip quality. Simultaneously, it shortens processing time and reduces production costs.

Claims

1. A novel laminar flow cooling roller, comprising a roller (1) and two shaft end assemblies, wherein the roller (1) has a left-right symmetrical structure, and the two shaft end assemblies are symmetrically arranged and connected to the left and right ends of the inner hole of the roller (1), characterized in that: Each shaft assembly includes a connecting shaft (2), an inner flange (31), and an outer flange (32). The connection between the connecting shaft (2) and the flange is wider in the middle and narrower at both ends, and is divided into shaft segment I (21), shaft segment II (22), and shaft segment III (23) from the inside out, forming outer stop I (24) and outer stop II (25). The inner hole of the inner flange (31) mates with shaft segment I (21), and its outer end face contacts outer stop I (24). The axial dimension between the inner end face of the inner plate (31) and the inner end face of the connecting shaft (2) is L1; the inner hole of the outer plate (32) fits with the shaft segment I (21), and its inner end face contacts the outer stop II (25); the axial dimension between the inner end face of the inner plate (31) and the outer end face of the outer plate (32) is L2; ​​the maximum gap between the inner hole of the inner plate (31) and the shaft segment I (21), and between the inner hole of the outer plate (32) and the shaft segment III (23) is 0.2 mm.

2. The laminar flow cooling roller according to claim 1, characterized in that: The roller (1) has a left-right symmetrical structure. Its inner hole gradually increases from the middle to both ends, and it is divided into cylinder I (11), cylinder II (12), cylinder III (13), cylinder II (12), and cylinder I (11), forming two inner stops I (14) and two inner stops II (15). The outer circle of the inner plate (31) fits with the cylinder II (12), and its inner end face contacts the inner stop II (15). The outer circle of the outer plate (32) fits with the cylinder II (12), its inner end face fits with the inner stop I (14), and its outer end face is welded and fixed to the cylinder I (11).

3. The laminar flow cooling roller according to claim 1, characterized in that: The inner plate (31) and the connecting shaft (2) are connected by welding: one weld is the mating point between the end face of shaft segment I (21) and the inner hole of the inner plate (31), and the other weld is the mating point between the outer end face of the inner plate (31) and the outer stop I (24); the outer plate (32) and the connecting shaft (2) are connected by welding: the two welds are the mating points between the inner and outer end faces of shaft segment I (21) and the outer plate (32).

4. The laminar flow cooling roller according to claim 1, characterized in that: The chamfer C between the inner end face (311) of the inner plate (31) and the outer circle is 1×45°.

Images