Finishing mill group structure with different bearing surface eccentric angles

Abstract

The utility model relates to the technical field of high-speed wire finishing mills, in particular to a finishing mill group structure with different bearing surface eccentric angles, which comprises a finishing mill, the finishing mill comprises a roll shaft, a roll collar, an oil film bearing and an eccentric bushing, the roll collar is arranged on the roll shaft, the oil film bearing and the roll shaft are arranged in the eccentric bushing, and the eccentric bushing is arranged on the roll collar. The eccentric angle of a roll shaft of each finishing mill in the finishing mill group is sequentially distributed from the front section to the rear section in a large-medium-large-medium-small angle mode, the large eccentric angle ranges from 0.12 degrees to 0.18 degrees, the medium eccentric angle ranges from 0.08 degrees to 0.12 degrees, the small eccentric angle ranges from 0.05 degrees to 0.08 degrees, it is guaranteed that gaps of oil films of different finishing mills are stable, the bearing capacity is guaranteed, meanwhile, the rolling precision is improved, and the service life of the finishing mills is prolonged. The roller box is prevented from being burnt.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed wire finishing mills, and relates to a finishing mill group structure with different bearing surface eccentricity angles. Background Art

[0002] When the Qinggang high-wire finishing mill is working, due to the influence of the rolling load, the rolling end of the large end of the roller will bend to both sides, causing the outer surface of the roller and the oil film bearing on the surface of the eccentric sleeve to be non-parallel, forming a small angle, so that the load originally evenly distributed on the oil film bearing and the eccentric sleeve is concentrated on the eccentric sleeve and the large end of the oil film bearing, which can easily cause the oil temperature to be too high and the oil film bearing of the roller box to burn.

[0003] The wire rods pass through the finishing mill in sequence, and the diameter of the wire rods changes from large to small from front to back, and the shape of the wire rods switches between ellipse and circle. A single roller matching angle cannot meet the requirements of the on-site working conditions. As the diameter of the wire rods changes from large to small, the oil film matching angle of the large end of the roller shaft, that is, the oil film gap, becomes larger and larger, and its rolling bearing capacity also becomes larger and larger, and the accuracy of the product cannot be guaranteed. Therefore, how to ensure the dimensional accuracy of the product has become a problem that needs to be solved urgently. Utility Model Content

[0004] The utility model aims to provide a finishing mill structure with different bearing surface eccentricity angles, so as to ensure the stability of oil film gaps of finishing mills of different stands, improve rolling accuracy while ensuring bearing capacity, and avoid burning of roll boxes.

[0005] The utility model provides a finishing mill structure with different bearing surface eccentricity angles, comprising a finishing mill, wherein the finishing mill comprises a roller shaft, a roller ring, an oil film bearing and an eccentric sleeve, wherein the roller ring bearing is arranged on the roller shaft, and the oil film bearing and the roller shaft are arranged in the eccentric sleeve, and the roller shaft eccentricity angle of each finishing mill in the finishing mill group is distributed in the order of "large-medium-large-medium-small" from the front section to the rear section, wherein the "large eccentricity angle" is 0.12°-0.18°, the "medium eccentricity angle" is 0.08°-0.12°, and the "small eccentricity angle" is 0.05°-0.08°.

[0006] Preferably, the finishing mill group consists of 8 finishing mills in total.

[0007] Preferably, the eccentricity angles of the 8 finishing mills are 0.12°~0.18° for the 1st mill, 0.08°~0.12° for the 2nd mill, 0.12°~0.18° for the 3rd mill, 0.08°~0.12° for the 4th mill, 0.08°~0.12° for the 5th mill, 0.08°~0.12° for the 6th mill, 0.05°~0.08° for the 7th mill, and 0.05°~0.08° for the 8th mill.

[0008] The beneficial effects of the utility model are: the "large-medium-large-medium-small" roller eccentric angle design enables the roller and oil film to bear large impact force and rolling force, and can also ensure the accuracy of wire product products, avoid roller box burning accidents, and increase the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 : Schematic diagram of the eccentric angle of the shaft roller;

[0010] Figure 2 : Cone box general layout drawing.

[0011] Markings in the figure: roller shaft 1, roller ring 2, eccentric angle 3, oil film bearing 4, eccentric sleeve 5. Specific implementation plan

[0012] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0013] In addition, the directional terms mentioned in the following embodiments, such as "upper" and "lower", etc., are only referenced to the directions of the drawings. Therefore, the directional terms used are used to illustrate rather than limit the invention of the utility model.

[0014] like Figure 1-2 The finishing mill group structure with different bearing surface eccentric angles includes 8 finishing mills, each of which includes a roller shaft 1, a roller ring 2, an oil film bearing 4 and an eccentric sleeve 5. The roller ring 2 is arranged on the roller shaft 1, and the oil film bearing 4 and the roller shaft 1 are arranged in the eccentric sleeve 5. According to the distribution and function of the 8 finishing mills, different roller shaft eccentric angles 3 are set, the first mill is 0.12°, the second mill is 0.08°, the third mill is 0.12°, the fourth mill is 0.08°, the fifth mill is 0.08°, the sixth mill is 0.08°, the seventh mill is 0.05°, and the eighth mill is 0.05°. The eccentric angle 3 is distributed in the state of "large-medium-large-medium-small" from the front section to the rear section of the finishing mill. The wire rod raw material is round, and it becomes elliptical after rolling by the first mill, and circular after rolling by the second mill. The elliptical and circular shapes of the latter mills are arranged in sequence.

[0015] The first frame is an elliptical trough. After the temperature is controlled by the water tank, the surface and core temperatures are uneven, resulting in large rolling resistance. When the roll box is used, the roll shaft is subjected to greater force, resulting in a certain swing inclination angle. Therefore, the eccentric angle 3 of the first frame is set to 0.12°.

[0016] After the first rolling, the wire is oval, and the second rolling is mainly to make the wire round, so that the rolling resistance is relatively reduced, but the speed of the wire passing through the rolling mill will be faster and faster, so the second stand is set with an eccentric angle of 0.08° 3. The eccentric angles of the first two stands of the finishing mill are large, which can bear large impact and rolling forces.

[0017] The first four stands are for front-end rolling, and the principles of the third and fourth stands are the same as those of the first and second stands. If large-size steel is being rolled, the first two stands can be skipped and rolling can start directly from the third and fourth stands.

[0018] The 5th and 6th frames are designed with a "medium" (0.08°) eccentric angle of 3. In addition to being able to withstand greater impact and rolling forces, it also prepares for further improvement in subsequent wire rod accuracy.

[0019] Finally, the 7th and 8th frames are designed with a “small” (0.05°) eccentricity angle of 3. At this time, the wire operation is stable, the impact force and rolling force are reduced, and the swing inclination angle of the roller is “small”. Designing a “small” oil film gap can improve the wire accuracy.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A finishing mill structure with different bearing surface eccentric angles, comprising a finishing mill, the finishing mill comprising a roller shaft, a roller ring, an oil film bearing and an eccentric sleeve, the roller ring being arranged on the roller shaft, the oil film bearing and the roller shaft being arranged in the eccentric sleeve, characterized in that: The roller eccentricity angle of each finishing mill in the finishing mill group is distributed in the order of "large-medium-large-medium-small" from the front section to the rear section, wherein the "large eccentricity angle" is 0.12° to 0.18°, the "medium eccentricity angle" is 0.08° to 0.12°, and the "small eccentricity angle" is 0.05° to 0.08°.

2. A finishing mill structure with different bearing surface eccentricity angles according to claim 1, characterized in that: The finishing mill group consists of 8 finishing mills in total.

3. A finishing mill structure with different bearing surface eccentricity angles according to claim 2, characterized in that: The eccentricity angles of the 8 finishing mills are 0.12°~0.18° for the first mill, 0.08°~0.12° for the second mill, 0.12°~0.18° for the third mill, 0.08°~0.12° for the fourth mill, 0.08°~0.12° for the fifth mill, 0.08°~0.12° for the sixth mill, 0.05°~0.08° for the seventh mill, and 0.05°~0.08° for the eighth mill.

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