A rolling mill tension column

Abstract

The utility model relates to the technical field of steel metallurgy discloses a rolling mill tension column, including the cylinder, the cylinder includes the screwdown device connecting section, copper nut connecting section, pull rod use section and screw thread connecting section, the circumferential of screwdown device connecting section is provided with the spline groove for the clearance fit with the turbine spline cover of screwdown device, is connected with the first transition section between screwdown device connecting section and copper nut connecting section, is connected with the second transition section between copper nut connecting section and pull rod use section, is connected with the third transition section between pull rod use section and screw thread connecting section, the middle part fixed of pull rod use section has the balance of ring. The utility model through setting up the spline groove with the turbine spline cover of screwdown device clearance fit in screwdown device connecting section, reduces the clearance deviation between tension column and screwdown device, the setting of T-shaped screw thread is convenient for with copper nut clearance adjustment, makes the adjustment of pull rod system more convenient and fast, is helpful to better control rolling material, guarantees finished product quality.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel metallurgy technology, and in particular to a rolling mill tension column. Background Technology

[0002] In steel metallurgical production, short-stress rolling mills achieve mill stability and material shape control by forming a closed loop through the internal stress of load-bearing components such as the reduction device, mill body, bearing housing, and rolls. Traditional mill tension columns present several problems during use: even after adjusting roll gap errors offline using a high-speed hydraulic motor, imbalances between the upper and lower rolls may still occur during online operation, leading to gap deviations between the reduction device and the tension column, especially in finishing stands, requiring repeated adjustments based on the finished material shape. Previously, the tension column used a two-keyway structure; however, during material shape adjustments in production, excessive gaps between the tension column and the reduction device made it difficult to control the deviation, affecting the rolled material shape and hindering online material shape control, ultimately impacting finished product quality and production efficiency. Therefore, a new mill tension column was developed. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a rolling mill tension column to solve the problems of poor clearance matching between the tension column and the pressing device and difficulty in material shape control in the prior art, so as to achieve stable transmission, ensure stable operation of the rolling mill and full control of the material shape.

[0004] To achieve the aforementioned objectives of this utility model, the technical solution adopted is as follows: A rolling mill tension column includes a column body comprising a pressing device connecting section, a copper nut connecting section, a tie rod service section, and a threaded connecting section. The pressing device connecting section has a spline groove circumferentially provided for clearance fitting with the turbine spline sleeve of the pressing device. The engagement of the spline groove with the turbine spline sleeve allows for more stable and accurate control and adjustment. A first transition section connects the pressing device connecting section and the copper nut connecting section; a second transition section connects the copper nut connecting section and the tie rod service section; and a third transition section connects the tie rod service section and the threaded connecting section. A balance spacer is fixed in the middle of the tie rod service section.

[0005] As a further improvement of this utility model, the copper nut connecting section is provided with a T-shaped thread, and the design of the T-shaped thread facilitates the mating with the copper nut.

[0006] As a further improvement of this utility model, the angle of the T-shaped thread is ≥30°. This angle design is beneficial for adjusting the gap with the copper nut, making the adjustment of the tie rod system more convenient and quick.

[0007] As a further improvement of this utility model, the first transition section includes a cylindrical connecting section, a conical connecting section and a cylindrical buffer section for installing a sealing sleeve, which are connected in sequence.

[0008] As a further improvement of this utility model, the section of the pull rod is plated with a chromium anti-corrosion layer, which can prevent corrosion and maintain smoothness.

[0009] The beneficial effects of this utility model are: by setting a spline groove in the connecting section of the pressing device and making a clearance fit with the turbine spline sleeve of the pressing device, this utility model can more stably and accurately control and adjust the material, reduce the clearance deviation between the tension column and the pressing device, and improve the online material shape control capability of the rolling mill compared with the traditional two-keyway structure.

[0010] The copper nut connecting section of this utility model is provided with a T-shaped thread with an angle of ≥30°, which facilitates the adjustment of the gap with the copper nut, making the adjustment of the tie rod system more convenient and quick, and helping to better control the rolling material shape and ensure the quality of the finished product.

[0011] The tie rod of this invention is plated with a chromium anti-corrosion layer, which prevents corrosion, maintains smoothness, and extends the service life of the tension column. The design of each transition section makes the connection between the various parts of the column more reasonable, and the setting of the balancing spacer ring helps to balance the relevant components and ensure the stable operation of the rolling mill. Attached Figure Description

[0012] 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 structure of the copper nut connecting section of this utility model; Figure 3 This is a schematic diagram of the T-shaped thread of this utility model.

[0013] In the diagram: 1. Column, 2. Pressing device connecting section, 3. Copper nut connecting section, 4. Tie rod usage section, 5. Threaded connecting section, 6. Spline groove, 7. First transition section, 8. Second transition section, 9. Third transition section, 10. Balance spacer ring, 11. T-shaped thread, 12. Columnar connecting section, 13. Conical connecting section, 14. Columnar buffer section. Detailed Implementation

[0014] 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.

[0015] 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.

[0016] like Figure 1-3 As shown, a rolling mill tension column includes a column body 1 made of 42CrMo material, which has undergone quenching and tempering treatment to a hardness of HB250-285. The entire column body 1 is treated with D4.3-800 (chlorination layer depth > 0.3, hardness HV ≥ 750). The column body 1 includes a pressing device connecting section 2, a copper nut connecting section 3, a tie rod usage section 4, and a threaded connecting section 5. The pressing device connecting section 2 is circumferentially provided with a spline groove 6 for clearance fit with the turbine spline sleeve of the pressing device. Through the cooperation between the spline groove 6 and the turbine spline sleeve, the adjustment can be controlled more stably and accurately. A first transition section 7 connects the pressing device connecting section 2 and the copper nut connecting section 3. A second transition section 8 connects the copper nut connecting section 3 and the tie rod usage section 4. A third transition section 9 connects the tie rod usage section 4 and the threaded connecting section 5. A balance spacer 10 is fixed in the middle of the tie rod usage section 4.

[0017] The copper nut connecting section 3 is provided with a T-shaped thread 11, which is designed to facilitate mating with the copper nut.

[0018] The angle of the T-shaped thread 11 is ≥30°. This angle design is beneficial for adjusting the gap with the copper nut, making the adjustment of the tie rod system more convenient and quick.

[0019] The first transition section 7 includes a cylindrical connecting section 12, a conical connecting section 13, and a cylindrical buffer section 14 for installing the sealing sleeve, which are connected in sequence. The first transition section 7 can eliminate the stress concentration between the pressing device connecting section 2 and the copper nut connecting section 3, while providing a support surface for the sealing sleeve, preventing cooling water from scouring the tension column axis, and ensuring the straightness stability of the tension column when under force.

[0020] The tie rod section 4 is plated with a chromium anti-corrosion layer, which prevents corrosion and maintains smoothness.

[0021] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this 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 rolling mill tension column, characterized in that: The device includes a column, which comprises a pressing device connecting section, a copper nut connecting section, a pull rod usage section, and a threaded connecting section. The pressing device connecting section is circumferentially provided with a spline groove for clearance fit with the turbine spline sleeve of the pressing device. A first transition section connects the pressing device connecting section and the copper nut connecting section. A second transition section connects the copper nut connecting section and the pull rod usage section. A third transition section connects the pull rod usage section and the threaded connecting section. A balance spacer is fixed in the middle of the pull rod usage section.

2. A rolling mill tension column according to claim 1, characterized in that: The copper nut connecting section is provided with a T-shaped thread.

3. A rolling mill tension column according to claim 2, characterized in that: The angle of the T-shaped thread is ≥30°.

4. A rolling mill tension column according to claim 1, characterized in that: The first transition section includes a cylindrical connecting section, a conical connecting section, and a cylindrical buffer section for installing a sealing sleeve, which are connected in sequence.

5. A rolling mill tension column according to claim 1, characterized in that: The section of the tie rod is plated with a chromium anti-corrosion layer.

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