Novel steel belt pinch roll

Abstract

The utility model discloses a novel steel belt pinch roll, belongs to the technical field of steel belt processing, and solves the abnormal problem that when an existing pinch roll is used for conveying, the shape of a steel coil is prone to lateral protrusion of multiple circles or bilateral lateral protrusion. The pinch roll comprises an upper pinch roll body and a lower pinch roll body which are arranged in parallel, the upper pinch roll body and the lower pinch roll body are both cylindrical rolls with the large middles and the two small ends, the upper pinch roll body comprises an upper cylindrical section, the two ends of the upper cylindrical section are each provided with at least one upper conical section, the lower pinch roll body comprises a lower cylindrical section, and the lower cylindrical section is provided with at least one lower conical section. The two ends of the lower cylindrical section are each provided with at least two lower conical sections, and the number of the lower conical sections corresponding to each end of the lower pinch roll is larger than the number of the upper conical sections corresponding to each end of the upper pinch roll. According to the steel belt pinch roll, the phenomena of single-edge side protrusion and double-edge side protrusion of a roll shape are reduced, the quality of a steel roll is improved, and meanwhile the service life of the pinch roll is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of steel strip processing, and more specifically, to a novel steel strip pinch roller. Background Art

[0002] During the coiling process, the coil is prone to abnormalities such as unilateral or bilateral protrusions. Adjustment of the coil shape often fails to produce a clear effect, and the abnormality is prone to recurring. This abnormality complicates transportation and can easily cause edge damage during transit, resulting in a reduced yield rate. For example, 304 stainless steel is prone to corrugation (mostly unilateral) after finish rolling, and this corrugation intensifies as thickness and width decrease. During coiling, due to poor plate shape, unilateral or bilateral protrusions often occur on multiple outer turns.

[0003] Analysis revealed that the existing pinch rollers in the coiling area of ​​most production lines feature parallel sections of the same length between the upper and lower pinch rollers. During production, the strip tension decreases after the strip tail is cast after finishing, leading to abnormal coiling, such as multiple outer or bilateral protrusions. This existing roller design was unable to effectively address these defects. Therefore, a new type of pinch roller was urgently needed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a new type of steel strip pinch roller in view of the above-mentioned deficiencies in the prior art, so as to reduce the phenomenon of unilateral and bilateral side protrusions of the coil, improve the quality of the steel coil, and extend the service life of the pinch roller.

[0005] The technical solution of the present utility model is as follows: a new type of steel strip pinch roller, comprising an upper pinch roller and a lower pinch roller arranged in parallel, the upper pinch roller and the lower pinch roller are both cylindrical rollers that are large in the middle and small at both ends, the upper pinch roller comprises an upper cylindrical section, both ends of the upper cylindrical section are provided with at least one upper conical section, the lower pinch roller comprises a lower cylindrical section, both ends of the lower cylindrical section are provided with at least two lower conical sections, and the number of lower conical sections corresponding to each end of the lower pinch roller is greater than the number of upper conical sections corresponding to each end of the upper pinch roller.

[0006] As a further improvement, the length of the upper pinch roller is the same as that of the lower pinch roller, and the maximum diameter of the upper pinch roller is greater than the maximum diameter of the lower pinch roller.

[0007] Furthermore, the upper cylindrical section and the upper conical section, the two adjacent upper conical sections, the lower cylindrical section and the lower conical section, and the two adjacent lower conical sections are all connected through chamfered corners.

[0008] Furthermore, the length of the upper cylindrical section is greater than that of the lower cylindrical section.

[0009] Furthermore, an upper conical section is provided at both ends of the upper cylindrical section, and the two upper conical sections are symmetrically arranged at both ends of the upper cylindrical section; two lower conical sections are provided at both ends of the lower cylindrical section, and the four lower conical sections are symmetrically arranged at both ends of the lower cylindrical section.

[0010] Furthermore, the length of the upper cylindrical section is greater than that of the upper conical section, the minimum radius of the upper conical section is smaller than the radius of the upper cylindrical section, and the difference △r1 is 1 to 2 mm.

[0011] Furthermore, the length of one of the lower conical sections close to the lower cylindrical section is greater than the length of the other lower conical section away from the lower cylindrical section, and the length of one of the lower conical sections close to the lower cylindrical section is greater than the length of the lower cylindrical section, the minimum radius of one of the lower conical sections close to the lower cylindrical section is smaller than the radius of the lower cylindrical section, and the difference △r2 is 0.5~1.5mm, and the minimum radius of the other lower conical section away from the lower cylindrical section is smaller than the radius of the lower cylindrical section, and the difference △r3 is 1~2mm.

[0012] Furthermore, the difference △r3 is twice the difference △r2.

[0013] Furthermore, the outer wall surfaces corresponding to the upper conical section and the lower conical section are both inclined surfaces.

[0014] Furthermore, the outer wall surfaces corresponding to the upper conical section and the lower conical section are both arc-shaped surfaces.

[0015] Beneficial effects

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The steel strip pinch roller of the utility model is configured with an upper pinch roller and a lower pinch roller as a structure with a larger middle portion and smaller ends, so that the lateral force of the two pinch rollers on the steel strip is reduced, thereby reducing the phenomenon of unilateral and bilateral side protrusions of the coil, improving the quality of the steel coil, and reducing the wear of the steel strip on the pinch roller, thereby effectively extending the service life of the pinch roller.

[0018] 2. The steel belt pinch roller of the present invention has a greater wear on the lower pinch roller due to the influence of its own gravity when the steel belt passes through the pinch roller. Therefore, the number of lower conical sections corresponding to each end of the lower pinch roller is greater than the number of upper conical sections corresponding to each end of the upper pinch roller. In this way, the wear of the lower pinch roller can be further slowed down while reducing the lateral force, thereby further extending the service life of the lower pinch roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the upper pinch roller in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the lower pinch roller in the utility model.

[0022] Among them: 1-upper pinch roller, 11-upper cylindrical section, 12-upper conical section, 2-lower pinch roller, 21-lower cylindrical section, 22-lower conical section. DETAILED DESCRIPTION

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

[0024] See Figure 1-3The utility model discloses a new type of steel strip pinching roller, including an upper pinching roller 1 and a lower pinching roller 2 arranged in parallel. The steel strip passes through the gap between the upper pinching roller 1 and the lower pinching roller 2 to form the steel strip pinching, wherein the upper pinching roller 1 and the lower pinching roller 2 are cylindrical rollers with a larger middle and smaller ends, that is, the diameter in the middle of the upper pinching roller 1 and the lower pinching roller 2 is larger than the diameter at their two ends. Compared with the traditional two cylindrical roller structures, when the pinching roller contacts the steel strip, the lateral force of the two pinching rollers on the steel strip on both sides is reduced. When the lateral force is reduced, the steel strip is difficult to move sideways. When the steel strip is curled and formed, the phenomenon of unilateral and bilateral side protrusions of the coil can be reduced, thereby improving the quality of the steel coil and reducing the wear of the steel strip on the pinching roller, effectively extending the service life of the pinching roller. Specifically, the upper pinch roller 1 includes an upper cylindrical section 11, wherein at least one upper conical section 12 is provided at both ends of the upper cylindrical section 11, and the upper cylindrical section 11 and the upper conical section 12 are an integrated structure, and the upper cylindrical section 11 and the upper conical section 12 are connected at one end with the maximum diameter, and between two adjacent upper conical sections 12, the maximum diameter end of one upper conical section 12 is connected to the minimum end of the other upper conical section 12, forming an upper pinch roller structure with gradually decreasing diameters at both ends; the lower pinch roller 2 includes a lower cylindrical section 21, and the lower cylindrical section 21 At least two lower conical sections 22 are provided at both ends of the lower cylindrical section 21 and the lower conical sections 22 are of an integral structure. The lower cylindrical section 21 and the lower conical section 22 are connected at one end with the largest diameter. Between two adjacent lower conical sections 22, the largest diameter end of one lower conical section 22 is connected to the smallest end of the other lower conical section 22, forming a lower pinch roller structure with gradually decreasing diameters at both ends. In addition, the number of lower conical sections 22 corresponding to each end of the lower pinch roller 2 is greater than the number of upper conical sections 12 corresponding to each end of the upper pinch roller 1. Since the steel strip wears more on the lower pinch roller 2 under the influence of its own gravity when passing through the pinch roller, the number of lower conical sections 22 corresponding to each end of the lower pinch roller 2 is greater than the number of upper conical sections 12 corresponding to each end of the upper pinch roller 1. In this way, the wear of the lower pinch roller 2 can be further slowed down while reducing the lateral force, thereby further extending the service life of the lower pinch roller 2.

[0025] The steel belt pinch roller of the utility model effectively improves the side protrusion problem of the coil. After experimental testing, the side protrusion rate is reduced from 15% to 3%. At the same time, the service life of the pinch roller can be increased from the lower limit of 100,000 tons of steel passing through to the lower limit of 200,000 tons of steel passing through. According to the estimated monthly benefit calculation formula of the number of improved particles × abnormal loss of a single coil × weight loss of a single steel coil + pinch roller rework cost × life of pinch roller before improvement ÷ life of pinch roller after improvement, about 264,000 yuan can be saved.

[0026] Preferably, the length of the upper pinch roller 1 is the same as that of the lower pinch roller 2. The two pinch rollers have the same length, which can improve the stability of the steel strip pinching and ensure the quality of the steel strip. The maximum diameter of the upper pinch roller 1 is larger than the maximum diameter of the lower pinch roller 2. Since the upper and lower pinch rollers are staggered, the diameter of the lower pinch roller 2 is made smaller to facilitate its installation in the coiling machine, so that it can better fall into the coiling point position of the steel strip, forming a bend in the steel strip, which is convenient for subsequent coiling of the steel strip.

[0027] Preferably, the upper cylindrical section 11 and the upper conical section 12, the two adjacent upper conical sections 12, the lower cylindrical section 21 and the lower conical section 22, and the two adjacent lower conical sections 22 are all connected by chamfered corners. Figure 2 Or as shown by R in 3, a rounded transition method is adopted to prevent the sharp corners at the joints of each section from wearing the steel strip, thereby further improving its product quality.

[0028] Preferably, the length of the upper cylindrical section 11 is greater than that of the lower cylindrical section 21 , which ensures the stability of the steel strip conveying and also facilitates the taper design layout of the multiple lower conical sections 22 of the lower pinch roller 2 .

[0029] Preferably, see Figure 2-3 , is a specific embodiment of the present invention. In this embodiment, an upper conical section 12 is provided at each end of the upper cylindrical section 11, and the two upper conical sections 12 are symmetrically arranged at both ends of the upper cylindrical section 11. Two lower conical sections 22 are provided at each end of the lower cylindrical section 21, and the four lower conical sections 22 are symmetrically arranged at both ends of the lower cylindrical section 21. In this embodiment, the length of the upper pinch roller 1 and the lower pinch roller 2 are both 1830 mm, the corresponding diameter of the upper pinch roller 1 is 900 mm, and the corresponding diameter of the lower pinch roller 2 is 500 mm.

[0030] By rationally optimizing the number of upper conical sections 12 of the upper pinch roller 1 and the number of lower conical sections 22 of the lower pinch roller 1, while reducing the phenomenon of single-sided and double-sided protrusions in the roll, the processing steps for the two pinch rollers can be reduced, reducing the processing difficulty and cost, and at the same time, the coaxiality of the two pinch rollers can be ensured. Of course, in other embodiments, each end of the upper pinch roller 1 can have two upper conical sections 12, while each end of the lower pinch roller 2 can have three lower conical sections 22, in a multiple relationship. Alternatively, each end of the upper pinch roller 1 can have one upper conical section 12, while each end of the lower pinch roller 2 can have three lower conical sections 22, and the relationship is not a multiple.

[0031] Specifically, the length of the upper cylindrical section 11 is greater than the length of the upper conical section 12 to ensure the stability of the steel strip clamping. The minimum radius of the upper conical section 12 is smaller than the radius of the upper cylindrical section 11, and the difference △r1 is 1 to 2 mm (e.g. Figure 2As shown in FIG, the taper of the upper tapered section 12 is rationally optimized to reduce the unilateral and bilateral side protrusions of the roll while ensuring the stability of the steel strip clamping. Specifically, the difference △r1 can be 1.2mm, 1.4mm, or 1.6mm.

[0032] Specifically, the length of one of the lower conical sections 22 close to the lower cylindrical section 21 is greater than the length of the other lower conical section 22 away from the lower cylindrical section 21, and the length of one of the lower conical sections 22 close to the lower cylindrical section 21 is greater than the length of the lower cylindrical section 21, and the minimum radius of one of the lower conical sections 22 close to the lower cylindrical section 21 is smaller than the radius of the lower cylindrical section 21, and the difference △r2 is 0.5 to 1.5 mm (e.g. Figure 3 As shown), the difference △r2 can be 0.6mm or 0.8mm or 1mm, the minimum radius of the other lower conical section 22 away from the lower cylindrical section 21 is smaller than the radius of the lower cylindrical section 21, and the difference △r3 is 1 to 2mm (as shown). Figure 3 Furthermore, the difference △r3 is twice the difference △r2, that is, the difference △r3 and the difference △r2 are in a multiple relationship. The taper of the lower tapered section 12 is rationally optimized, which can reduce the unilateral and bilateral side protrusions of the roll while ensuring the stability of the steel strip clamping.

[0033] Preferably, in one embodiment, the outer wall surfaces corresponding to the upper conical section 12 and the lower conical section 22 are both inclined surfaces. The inclined surface structure is easier to process, greatly reducing the difficulty of modification.

[0034] Preferably, in another embodiment, the outer wall surfaces corresponding to the upper conical section 12 and the lower conical section 22 are both arc-shaped surfaces. The arc-shaped surface structure can enable each conical section 12 to better contact the steel strip, further ensuring product quality.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A new type of steel belt pinch roller, comprising an upper pinch roller (1) and a lower pinch roller (2) arranged in parallel, characterized in that: The upper pinch roller (1) and the lower pinch roller (2) are both cylindrical rollers that are larger in the middle and smaller at both ends. The upper pinch roller (1) includes an upper cylindrical section (11), and at both ends of the upper cylindrical section (11) there is at least one upper conical section (12). The lower pinch roller (2) includes a lower cylindrical section (21), and at both ends of the lower cylindrical section (21) there are at least two lower conical sections (22). The number of lower conical sections (22) corresponding to each end of the lower pinch roller (2) is greater than the number of upper conical sections (12) corresponding to each end of the upper pinch roller (1).

2. A new type of steel belt pinch roller according to claim 1, characterized in that: The length of the upper pinch roller (1) is the same as that of the lower pinch roller (2), and the maximum diameter of the upper pinch roller (1) is greater than the maximum diameter of the lower pinch roller (2).

3. The new steel belt pinch roller according to claim 1, characterized in that: The upper cylindrical section (11) and the upper conical section (12), the two adjacent upper conical sections (12), the lower cylindrical section (21) and the lower conical section (22), and the two adjacent lower conical sections (22) are all connected through chamfered corner transitions.

4. The novel steel belt pinch roller according to claim 1 is characterized in that: The length of the upper cylindrical section (11) is greater than the length of the lower cylindrical section (21).

5. The novel steel belt pinch roller according to claim 1, characterized in that: An upper conical section (12) is provided at both ends of the upper cylindrical section (11), and the two upper conical sections (12) are symmetrically arranged at the two ends of the upper cylindrical section (11); two lower conical sections (22) are provided at both ends of the lower cylindrical section (21), and the four lower conical sections (22) are symmetrically arranged at the two ends of the lower cylindrical section (21).

6. A new type of steel belt pinch roller according to claim 5, characterized in that: The length of the upper cylindrical section (11) is greater than that of the upper conical section (12), the minimum radius of the upper conical section (12) is smaller than the radius of the upper cylindrical section (11), and the difference △r1 is 1 to 2 mm.

7. The novel steel belt pinch roller according to claim 5, characterized in that: The length of one of the lower conical sections (22) close to the lower cylindrical section (21) is greater than the length of the other lower conical section (22) away from the lower cylindrical section (21), and the length of one of the lower conical sections (22) close to the lower cylindrical section (21) is greater than the length of the lower cylindrical section (21); the minimum radius of one of the lower conical sections (22) close to the lower cylindrical section (21) is smaller than the radius of the lower cylindrical section (21), and the difference △r2 is 0.5 to 1.5 mm; the minimum radius of the other lower conical section (22) away from the lower cylindrical section (21) is smaller than the radius of the lower cylindrical section (21), and the difference △r3 is 1 to 2 mm.

8. The novel steel belt pinch roller according to claim 7, characterized in that: The difference △r3 is twice the difference △r2.

9. A new type of steel belt pinch roller according to any one of claims 1 to 8, characterized in that: The outer wall surfaces corresponding to the upper conical section (12) and the lower conical section (22) are both inclined surfaces.

10. A new type of steel belt pinch roller according to any one of claims 1 to 8, characterized in that: The outer wall surfaces corresponding to the upper conical section (12) and the lower conical section (22) are both arc-shaped surfaces.

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