A 230-roller box eccentric sleeve locating bearing seat structure

Abstract

The utility model relates to rolling mill equipment technical field discloses a 230 roll box eccentric sleeve locating bearing seat structure, including fixed connection's first annular portion and second annular portion, first annular portion is equipped with five first arc opening and two groups of symmetrical second arc opening, and the threaded hole is set up in the corresponding position of second annular portion. Through first annular portion and second annular portion eccentric integration design, combine five 60 degrees first arc opening and two groups of 36 degrees symmetrical second arc opening, construct 9 point bolt stress network, effectively solve the uneven bolt stress problem under eccentric structure. Through practice verification, the structure can make the rolling mill operation cycle from the original extension to 12 months, the roll ring wear rate drops 40%, significantly improves equipment stability and service life, is suitable for bearing positioning of high -speed wire rod rolling equipment, has good application value.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill equipment technology, and in particular to a structure for a 230 roll box eccentric sleeve positioning bearing seat. Background Technology

[0002] The double-high-speed wire rod reducing mill is the final stand for wire rod rolling, and its assembly accuracy and operating status play a crucial role in the quality of the finished product. The maximum wire rod rolling speed is 120 m / s. During the rolling process, the low temperature of the red-hot steel head causes significant impact on the roll box, resulting in the roll shaft frequently experiencing large instantaneous axial impact forces. This places high demands on the quality of the eccentric sleeve positioning bearing cap bolts. The original design of the bearing cap bolts consisted of five 12.9 grade M10*40 socket head cap bolts. However, due to the eccentric design of the bearing housing, the five bolts could not be evenly distributed, leading to uneven stress during operation. The two bolts with the furthest center holes frequently broke. This breakage caused inconsistent rolling heights on the roll shaft, affecting the quality of the finished product. In severe cases, it could lead to a major quality incident requiring the scrapping of a large number of finished products. The finished product stand roll box is typically taken offline for maintenance and inspection after a maximum of two months of use, severely restricting production and increasing costs. Therefore, a 230 roll box eccentric sleeve positioning bearing housing structure was developed. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a 230 roller box eccentric sleeve positioning bearing seat structure to solve the problems pointed out in the background art.

[0004] To achieve the aforementioned objectives of this utility model, the technical solution adopted is as follows: A 230 roller box eccentric sleeve positioning bearing seat structure includes a first annular portion and a second annular portion. The second annular portion is fixed to the bottom of the first annular portion. Five first arc-shaped openings are evenly spaced along the circumferential direction at the edge of the first annular portion. Two sets of auxiliary force-bearing openings are symmetrically arranged at the edge of the first annular portion. Each set of auxiliary force-bearing openings includes two symmetrically arranged second arc-shaped openings. The two second arc-shaped openings in one set of auxiliary force-bearing openings are symmetrically arranged on both sides of the first arc-shaped opening located in the middle. A first threaded hole is formed on the second annular portion corresponding to the position of the first arc-shaped opening, and a second threaded hole is formed on the second annular portion corresponding to the position of the second arc-shaped opening. The first threaded hole is used to assemble a 12.9 grade M10×40 socket head cap screw, and the second threaded hole is used to assemble an M8 fastening bolt.

[0005] As a further improvement of this utility model, the first annular portion and the second annular portion are integrally formed.

[0006] As a further improvement of this utility model, the included angle between two adjacent first arc-shaped openings is 60°.

[0007] As a further improvement of this utility model, the included angle between the two second arc-shaped openings of each group of auxiliary force-bearing openings is 36°.

[0008] As a further improvement of this utility model, the center of the first annular portion and the center of the second annular portion are spaced 12mm apart.

[0009] The beneficial effects of this utility model are: by setting five evenly distributed first arc-shaped openings and two sets of symmetrical auxiliary force-bearing openings in the first annular part, as well as corresponding first threaded holes and second threaded holes, the structure is subjected to more uniform stress, stress concentration is reduced, the strength of the pressure cap is increased, the ability to withstand axial impact is enhanced, and the service life is improved. Attached Figure Description

[0010] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the second-view structure of the present invention.

[0011] In the figure: 1. First annular part, 11. First arc-shaped opening, 12. Auxiliary force-bearing opening group, 13. Second arc-shaped opening, 2. Second annular part, 21. First threaded hole, 22. Second threaded hole. Detailed Implementation

[0012] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0013] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0014] like Figure 1-2As shown, a 230 roller box eccentric sleeve positioning bearing seat structure includes a first annular part 1 and a second annular part 2. The second annular part 2 is fixed to the bottom of the first annular part 1. Five first arc-shaped openings 11 are evenly spaced along the circumferential direction at the edge of the first annular part 1. Two sets of auxiliary force-bearing opening groups 12 are symmetrically opened at the edge of the first annular part 1. Each set of auxiliary force-bearing opening groups 12 includes two symmetrically arranged second arc-shaped openings 13. The two second arc-shaped openings 13 of one set of auxiliary force-bearing opening groups 12 are symmetrically arranged on both sides of the first arc-shaped opening 11 located in the middle. A first threaded hole 21 is opened on the second annular part 2 at the position corresponding to the first arc-shaped opening 11. A second threaded hole 22 is opened on the second annular part 2 at the position corresponding to the second arc-shaped opening 13.

[0015] The first annular portion 1 and the second annular portion 2 are integrally formed.

[0016] The included angle between two adjacent first arc-shaped openings 11 is 60°.

[0017] The included angle between the two second arc-shaped openings 13 of each auxiliary force-bearing opening group 12 is 36°.

[0018] The center of the first annular portion 1 is 12 mm apart from the center of the second annular portion 2.

[0019] The first annular portion 1 and the second annular portion 2 are concentrically offset by 12mm, forming an eccentric foundation structure to meet the assembly requirements of the rolling mill. The eccentricity of 12mm is precisely matched with the opening angle, ensuring that the roll shaft elevation deviation is ≤0.05mm, and the finished product qualification rate is increased to 99.8%. The five first arc-shaped openings 11 are distributed at equal angles of 60°, corresponding to the installation of 5 M10 bolts, forming a basic force-bearing system. The two sets of 4 second arc-shaped openings 13 are symmetrically arranged at an included angle of 36°, and the edge force strength is enhanced by M8 bolts to disperse the axial impact force. The first threaded hole 21 and the second threaded hole 22 correspond to the main bolt and the auxiliary bolt, respectively, forming a 9-point force-bearing network. The 9 bolts (5×M10+4×M8) form a ring force-bearing matrix, reducing the stress of the farthest bolt by more than 60% and avoiding breakage. The online operation cycle of the rolling mill is extended from 2 months to 12 months, the maintenance frequency is reduced by 83%, the roll ring wear rate is reduced by 40%, and the annual cost savings in spare parts consumption exceed 500,000 yuan.

[0020] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, component disassembly or combination, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A 230 roller box eccentric sleeve positioning bearing seat structure, characterized in that: The device includes a first annular portion and a second annular portion. The second annular portion is fixed to the bottom of the first annular portion. Five first arc-shaped openings are evenly spaced along the circumferential direction at the edge of the first annular portion. Two sets of auxiliary force-bearing openings are symmetrically opened at the edge of the first annular portion. Each set of auxiliary force-bearing openings includes two symmetrically arranged second arc-shaped openings. The two second arc-shaped openings of one set of auxiliary force-bearing openings are symmetrically arranged on both sides of the first arc-shaped opening located in the middle. A first threaded hole is opened on the second annular portion at the position corresponding to the first arc-shaped opening. A second threaded hole is opened on the second annular portion at the position corresponding to the second arc-shaped opening.

2. The eccentric sleeve positioning bearing seat structure for a 230 roller box according to claim 1, characterized in that: The first annular portion and the second annular portion are integrally formed.

3. The eccentric sleeve positioning bearing seat structure for a 230 roller box according to claim 1, characterized in that: The included angle between two adjacent first arc-shaped openings is 60°.

4. The eccentric sleeve positioning bearing seat structure for a 230 roller box according to claim 1, characterized in that: The included angle between the two second arc-shaped openings in each group of auxiliary force-bearing openings is 36°.

5. The eccentric sleeve positioning bearing seat structure for a 230 roller box according to claim 1, characterized in that: The center of the first annular portion and the center of the second annular portion are 12mm apart.

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