H-beam flange straightening device

Abstract

The application discloses an H-shaped steel flange straightening device, which comprises a conveying roller way, straightening rollers arranged above the conveying roller way, web limiting wheels used for fixing the web of the H-shaped steel and a movable lower supporting roller, the straightening rollers are arranged to be switchable between a first pressing state and a second pressing state, the straightening rollers in the first pressing state apply pressure to both ends of the lower flange plate of the H-shaped steel, the straightening rollers in the second pressing state apply pressure to both ends of the upper flange plate of the H-shaped steel, and the lower supporting roller is arranged to support the lower flange plate of the H-shaped steel when the straightening rollers are in the first pressing state. The H-shaped steel flange straightening device has the advantages of simple structure, convenient installation and use, and can effectively prevent the H-shaped steel from being bent, the flange inclination from being out of standard and the bracket from being retracted during the production process, and improves the product qualification rate.

Description

Technical Field

[0001] This invention belongs to the field of H-beam production technology, and more specifically, this invention relates to an H-beam flange straightening device. Background Technology

[0002] H-beam production mainly includes hot-rolled H-beams and welded H-beams. For hot-rolled H-beams, to ensure performance meets technical requirements and reduce production costs, some grades of hot-rolled H-beams undergo a post-rolling water-cooling process. During the subsequent cooling process, thermal stress can cause a bracket leg phenomenon, i.e., flange bending. Additionally, misalignment of the rolling line during the rolling process can cause defects such as upward and downward widening of the H-beam. For welded H-beams, similarly, thermal stress at the radius (R-angle) during welding can cause a bracket leg phenomenon, preventing downstream users from performing butt welding. When using existing roll straightening equipment to straighten H-beams, the flanges have small openings at the top, making it difficult for them to properly engage, resulting in straightening jamming. Furthermore, excessive flange bending due to deformation necessitates scrapping, reducing product qualification rate and yield, leading to significant economic losses.

[0003] Patent document CN 212469301 U discloses a rigid flange straightening machine, which includes a main table, limiting seats located on opposite sides of the upper surface of the main table, and a straightening mechanism located on the limiting seats for straightening H-beam flanges. Two sets of limiting wheels are provided between the opposite sides of the two limiting seats, each abutting against the sides of the H-beam web. The limiting seats are equipped with a limiting wheel driving mechanism that can drive the limiting wheels to move along the width direction of the H-beam. This design, by having the limiting wheels abut against the web, prevents deviation during the movement of the H-beam along its length, ensuring normal straightening operation and improving the straightening quality of the H-beam. However, this rigid flange straightening machine can only straighten bracket flanges; it cannot straighten H-beam flanges with defects such as upward and downward widening or X-shaped flanges. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention provides an H-beam flange straightening device, the purpose of which is to prevent flange bending, excessive flange slope, and bracket leg defects during the production of H-beams, thereby improving the product qualification rate.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an H-beam flange straightening device, comprising a conveyor roller table, a straightening roller located above the conveyor roller table, a web limiting wheel for fixing the web of the H-beam, and a movable lower support roller. The straightening roller is configured to switch between a first pressing state and a second pressing state. In the first pressing state, the straightening roller applies pressure to both ends of the lower flange of the H-beam, and in the second pressing state, the straightening roller applies pressure to both ends of the upper flange of the H-beam. The lower support roller is configured to provide support to the lower flange of the H-beam when the straightening roller is in the first pressing state.

[0006] The web plate limiting wheels are arranged in pairs, with the two web plate limiting wheels of the same pair located on opposite sides of the web of the H-beam.

[0007] The web plate limiting wheels are provided in two pairs, and the two pairs of web plate limiting wheels are located at the inlet and outlet positions of the H-beam flange straightening device, respectively.

[0008] The straightening roller is connected to the first pressing mechanism, and the height of the straightening roller in the first pressing state is less than the height of the straightening roller in the second pressing state.

[0009] The web plate limiting wheel is connected to the second pressing mechanism.

[0010] The straightening rollers are arranged in pairs.

[0011] The conveyor rollers are mounted on the lower base, and the straightening rollers and the web plate limiting wheels are mounted on the upper base, which is located above the lower base.

[0012] The H-beam flange straightening device also includes a limiting mechanism for limiting the H-beam, which is located behind the upper base and the lower base.

[0013] The straightening rollers come in various models with different lengths, and the length of the straightening roller in the first pressed state is shorter than the length of the straightening roller in the second pressed state.

[0014] The length of the contact portion between the straightening roller and the upper and lower flange plates of the H-beam is set to 0.85B≤l1+l2≤B, where B is the width of the upper or lower flange plate of the H-beam, and l1 and l2 are the lengths of the contact portions between the two straightening rollers and the upper or lower flange plates of the H-beam.

[0015] The H-beam flange straightening device of the present invention has a simple structure and is easy to install and use. It can effectively prevent flange bending, excessive flange slope, and bracket slippage of H-beams during the production process, thereby improving the product qualification rate. Attached Figure Description

[0016] This manual includes the following figures, which illustrate the following:

[0017] Figure 1 This is a schematic diagram of the structure of the H-beam flange straightening device of the present invention;

[0018] Figure 2 This is a diagram illustrating the principle of bracket-based straightening.

[0019] Figure 3 This is a diagram illustrating the principle of X-leg straightening and upper and lower expansion;

[0020] Figure 4 This is a schematic diagram of the principle of unilateral flange straightening;

[0021] Figure 5 This is a structural schematic diagram of a bracketed H-beam;

[0022] Figure 6 This is a structural diagram of an X-leg H-beam.

[0023] The markings in the diagram are as follows: 1. Straightening roller; 2. Web plate limiting wheel; 3. Lower support roller; 4. Limiting wheel support mechanism; 5. Upper base; 6. Conveying roller conveyor; 7. Lower base; 8. Drive shaft; 9. Straightening roller limiting plate; 10. First pressing mechanism; 11. Second pressing mechanism; 12. Limiting mechanism; 13. H-beam; 14. Upper flange plate; 15. Lower flange plate. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0025] It should be noted that in the following embodiments, the terms "first," "second," and "third" do not represent an absolute distinction in structure and / or function, nor do they represent the order of execution; they are merely for the convenience of description.

[0026] like Figures 1 to 4 As shown, the present invention provides an H-beam flange straightening device, including a lower base 7, an upper base 5, a conveyor roller 6, a straightening roller 1 located above the conveyor roller 6, a web limiting wheel 2 for fixing the web of the H-beam, and a movable lower support roller 3. The straightening roller 1 is configured to switch between a first pressing state and a second pressing state. In the first pressing state, the straightening roller 1 applies pressure to both ends of the lower flange of the H-beam, and in the second pressing state, the straightening roller 1 applies pressure to both ends of the upper flange of the H-beam. The lower support roller 3 is configured to provide support to the lower flange of the H-beam when the straightening roller 1 is in the first pressing state.

[0027] Specifically, such as Figure 1 As shown, the upper base 5 is located above the lower base 7. Both the upper base 5 and lower base 7 are fixedly installed. The conveyor roller 6 is rotatably mounted on the lower base 7. Multiple conveyor rollers 6 are provided, all aligned on a straight line parallel to the first direction. The axis of the conveyor roller 6 is parallel to the second direction, which is horizontal and perpendicular to each other. The web plate limiting wheels 2 are arranged in pairs, with each pair located on opposite sides of the web of the H-beam. The web plate limiting wheels 2 are aligned on a straight line parallel to the second direction. Each web plate limiting wheel 2 is cylindrical, with its axis being vertical. The outer surface of the web plate limiting wheel 2 contacts the surface of the web of the H-beam. During the straightening process, the web of the H-beam is located between two paired web limiting wheels 2, the upper flange of the H-beam is located above the web, and the lower flange of the H-beam is located below the web. The upper flange and the lower flange are fixedly connected to the upper and lower ends of the web, respectively.

[0028] Preferably, the lower support roller 3 is rotatably mounted on the upper base 5, and is connected to the drive shaft 8, which is connected to the drive mechanism. The axis of the lower support roller 3 is parallel to the second direction. The lower support roller 3 can be adjusted vertically in a coordinated manner.

[0029] like Figure 1 As shown, in this embodiment, two pairs of web plate limiting wheels 2 are provided, and the two pairs of web plate limiting wheels 2 are located at the inlet and outlet positions of the H-beam flange straightening device, respectively, and the straightening roller 1 is located between the two pairs of web plate limiting wheels 2.

[0030] like Figure 1 As shown, the straightening roller 1 is connected to the first pressing mechanism 10, which is mounted on the upper base 5. The first pressing mechanism 10 controls the straightening roller 1 to switch between a first pressing state and a second pressing state. The height of the straightening roller 1 in the first pressing state is less than the height of the straightening roller 1 in the second pressing state. Two straightening rollers 1 are provided, and the two straightening rollers 1 are located on the same straight line parallel to the second direction. Each straightening roller 1 is connected to one of the first pressing mechanisms 10.

[0031] Preferably, the first pressing mechanism 10 mainly consists of a hydraulic device or a pressing screw and a fixing screw in the second direction. When it is necessary to adjust the height of the straightening roller 1, the straightening roller 1 is adjusted to a specific position by the hydraulic device or the pressing screw, and then locked by the fixing screw to prevent it from moving during the straightening process and reducing the straightening accuracy.

[0032] like Figure 1As shown, the web plate limiting wheel 2 is mounted on the limiting wheel support mechanism 4. The limiting wheel support mechanism 4 is connected to the second pressing mechanism 11, which is mounted on the upper base 5. The second pressing mechanism 11 controls the limiting wheel support mechanism 4 and the web plate limiting wheel 2 on it to move linearly in a set direction. The direction of linear movement of the web plate limiting wheel 2 is parallel to the second direction. Each web plate limiting wheel 2 is mounted on a limiting wheel support mechanism 4, and each limiting wheel support mechanism 4 is connected to a second pressing mechanism 11. The distance between the two web plate limiting wheels 2 arranged in pairs can be adjusted to meet the fixing requirements of the web of H-beams of different thicknesses, thereby improving the stability of the H-beams during the straightening process. The second pressing mechanism 11 is mainly composed of a hydraulic device, which controls the movement of the limiting wheel support mechanism 4 and is limited by a nut in the second direction.

[0033] like Figure 1 As shown, the H-beam flange straightening device of the present invention also includes a limiting mechanism 12 for limiting the H-beam, which is located behind the upper base 5 and the lower base 7.

[0034] Preferably, the straightening roller 1 comes in various models with different lengths, and the length of the straightening roller 1 in the first pressed state is shorter than the length of the straightening roller 1 in the second pressed state. The length of the contact portion between the straightening roller 1 and the upper and lower flange plates of the H-beam is set to 0.85B≤l1+l2≤B, where B is the width of the upper or lower flange plate of the H-beam, and the upper and lower flange plates have the same width. l1 and l2 are the lengths of the contact portions between the two straightening rollers 1 and the upper or lower flange plates of the H-beam, respectively. This configuration helps to improve straightening accuracy while reducing straightening force and minimizing the requirements for equipment strength and rigidity.

[0035] like Figure 2 and Figure 4 As shown, when defects such as flange bending or bracket legs occur in the H-beam, the lower support roller 3 is located below the lower flange plate of the H-beam. The lower support roller 3 is close to the outer edge of the contact area between the lower flange plate and the web of the H-beam. The two straightening rollers 1 are located above the lower flange plate. Under the action of the first pressing mechanism 10, the two straightening rollers 1 move downward and contact the upper surface of the lower flange plate. The two straightening rollers 1 are in the first pressing state. The two straightening rollers 1 press down on both ends of the lower flange plate in the width direction, so that it passes through the elastic deformation zone. The straightening rollers 1 enter the plastic deformation zone, thereby straightening the lower flange plate of the H-beam.

[0036] To prevent instability during the straightening process, web limiting wheels 2 are installed at the inlet and outlet of the straightening device to fix the web of the H-beam. Simultaneously, to prevent the H-beam from warping during straightening, a vertical limiting mechanism 12 is installed behind the straightening roller 1. This limiting mechanism 12 restricts the flanges of the H-beam, ensuring stability during straightening.

[0037] like Figure 3 As shown, when the H-beam exhibits an upward expansion and downward widening phenomenon or an X-leg situation, the lower support roller 3 is moved below the conveyor roller table 6 by the hydraulic device. The lower support roller 3 does not contact the lower flange plate of the H-beam. The straightening roller 1 is adjusted to the upper surface of the upper flange plate of the H-beam through the first pressing mechanism 10. The two straightening rollers 1 are in the second pressing state. The two straightening rollers 1 press down on both ends of the upper flange plate in the width direction respectively. At the same time, the length of the two straightening rollers 1 is adjusted so that the contact arc length between the two straightening rollers 1 and the upper flange plate of the H-beam meets the requirement of 0.85B≤l1+l2≤B, where B is the flange width of the H-beam, and l1 and l2 are the contact arc lengths between the two straightening rollers 1 and the upper flange plate of the H-beam.

[0038] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An H-beam flange straightening device, comprising a conveyor roller table and straightening rollers located above the conveyor roller table, characterized in that: It also includes a web limiting wheel for fixing the web of the H-beam and a movable lower support roller. The straightening roller is configured to switch between a first pressing state and a second pressing state. In the first pressing state, the straightening roller applies pressure to both ends of the lower flange of the H-beam, and in the second pressing state, the straightening roller applies pressure to both ends of the upper flange of the H-beam. The lower support roller is configured to provide support to the lower flange of the H-beam when the straightening roller is in the first pressing state. The straightening roller is connected to the first pressing mechanism, which is mounted on the upper base. The first pressing mechanism controls the straightening roller to switch between a first pressing state and a second pressing state. The height of the straightening roller in the first pressing state is less than the height of the straightening roller in the second pressing state. Two straightening rollers are provided, and the two straightening rollers are on the same straight line parallel to the axis of the conveyor roller table. Each straightening roller is connected to a first pressing mechanism. The lower support roller is configured to be adjustable vertically in a coordinated manner. The length of the straightening roll in the first pressed-down state is less than the length of the straightening roll in the second pressed-down state; When an H-beam has flange bending or bracket leg defects, the lower support roller is located below the lower flange plate of the H-beam and is close to the outer edge of the contact area between the lower flange plate and the web plate. The two straightening rollers are located above the lower flange plate. Under the action of the first pressing mechanism, the two straightening rollers move downward and contact the upper surface of the lower flange plate. The two straightening rollers are in the first pressing state. The two straightening rollers press down on both ends of the lower flange plate in the width direction, so that it passes through the elastic deformation zone and enters the plastic deformation zone, thereby straightening the lower flange plate of the H-beam. When the H-beam exhibits an upward expansion and downward widening phenomenon or an X-leg configuration, the lower support roller is moved below the conveyor roller table by the hydraulic device. The lower support roller does not contact the lower flange plate of the H-beam. The straightening roller is adjusted to the upper surface of the upper flange plate of the H-beam through the first pressing mechanism. The two straightening rollers are in the second pressing state. The two straightening rollers press down on both ends of the upper flange plate in the width direction, and the length of the two straightening rollers is adjusted at the same time. The length of the contact portion between the straightening roller and the upper and lower flanges of the H-beam is set to 0.85B ≤ l1 + l2 ≤ B, where B is the width of the upper or lower flange of the H-beam, and l1 and l2 are the lengths of the contact portion between the two straightening rollers and the upper or lower flange of the H-beam.

2. The H-beam flange straightening device according to claim 1, characterized in that: The web plate limiting wheels are arranged in pairs, with the two web plate limiting wheels of the same pair located on opposite sides of the web of the H-beam.

3. The H-beam flange straightening device according to claim 2, characterized in that: The web plate limiting wheels are provided in two pairs, and the two pairs of web plate limiting wheels are located at the inlet and outlet positions of the H-beam flange straightening device, respectively.

4. The H-beam flange straightening device according to any one of claims 1 to 3, characterized in that: The web plate limiting wheel is connected to the second pressing mechanism.

5. The H-beam flange straightening device according to any one of claims 1 to 3, characterized in that: The straightening rollers are arranged in pairs.

6. The H-beam flange straightening device according to any one of claims 1 to 3, characterized in that: The conveyor rollers are mounted on the lower base, and the straightening rollers and the web plate limiting wheels are mounted on the upper base, which is located above the lower base.

7. The H-beam flange straightening device according to claim 6, characterized in that: It also includes a limiting mechanism for limiting the H-beam, which is located behind the upper and lower bases.

8. The H-beam flange straightening device according to any one of claims 1 to 3, characterized in that: The straightening rollers come in various models with different lengths and sizes.

Images