A universal straightening device for rectangular tubes

Abstract

The utility model discloses a general shaping device of rectangular tube, including the shaping platform and pneumatic shaping assembly, pneumatic shaping assembly is located on the shaping platform, and the tabletop of shaping platform is equipped with a plurality of shaping stop piece mounting holes, and at least three shaping stop piece mounting holes are equipped with the shaping stop piece of detachable installation, pneumatic shaping assembly includes the shaping cylinder, and the shaping surface opposite of pneumatic shaping assembly and shaping stop piece is set up, shaping stop piece includes the column and cylinder, and the column and cylinder of shaping stop piece are integrally formed, and shaping stop piece is installed on shaping stop piece mounting hole through the column, one side of cylinder is equipped with the shaping surface, and the other side is equipped with the step shape support surface, and the step shape support surface sets up in the opposite direction of the stress of shaping surface.

Description

Technical Field

[0001] This utility model relates to the field of metal pipe processing, and in particular to a universal straightening device for rectangular tubes. Background Technology

[0002] In metal processing and structural component manufacturing, rectangular tubes (square tubes) often undergo bending, twisting, and other deformations after cutting, welding, or transportation, affecting subsequent assembly accuracy and product quality. Existing straightening methods often involve complex adjustable equipment with time-consuming and labor-intensive adjustment processes, resulting in low production efficiency. Simple straightening tools or manual correction, however, struggle to guarantee the accuracy and consistency of the straightened plane. Furthermore, during the straightening process, the fixtures or stops themselves may shift or deform under immense compressive force, impacting the final result.

[0003] Therefore, the market urgently needs a rectangular tube straightening device that is easy to adjust and has stable and reliable straightening. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a universal rectangular tube straightening device that is simple in structure, highly versatile, and provides stable and accurate straightening.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A universal rectangular tube straightening device includes a straightening table and a pneumatic straightening assembly. The pneumatic straightening assembly is disposed on the straightening table, and the table surface is provided with multiple straightening stop mounting holes. At least three straightening stop mounting holes are provided with detachable straightening stops. The pneumatic straightening assembly includes a straightening cylinder, and the straightening surfaces of the pneumatic straightening assembly and the straightening stops are arranged opposite to each other.

[0006] Preferably, the alignment stop includes a post and a cylinder, the post and the cylinder are integrally formed, and the alignment stop is installed on the alignment stop mounting hole through the post.

[0007] Preferably, the cylinder has a shaping surface on one side and a stepped support surface on the other side.

[0008] Preferably, the stepped support surface is positioned in the opposite direction of the force applied to the straightening surface, so as to transfer the overturning moment generated during straightening to the surface of the straightening table.

[0009] Preferably, the pneumatic alignment assembly further includes an alignment push plate, which is provided with a hanging ear and connected to the output end of the alignment cylinder through the hanging ear.

[0010] Preferably, the side of the alignment push plate facing the alignment stop is a planar structure.

[0011] Preferably, the mounting holes for the multiple alignment stops are arranged in an array.

[0012] The beneficial effects of this utility model include the following: By setting an array of mounting holes for the straightening stops on the straightening table surface, and using detachable straightening stops, a modular layout design is achieved, allowing the device to be quickly adjusted to adapt to rectangular tubes of various widths without replacing any core components.

[0013] By using the stepped support surface design of the calibration stop, the overturning force generated during calibration is effectively decomposed and transmitted to the worktable using the principle of reaction force. This solves the technical problem that traditional adjustable stops are prone to displacement and tilting under heavy pressure, ensuring the absolute stability of the calibration process and guaranteeing high-precision calibration results. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the general-purpose rectangular tube straightening device in Example 1; Figure 2 This is a structural exploded view of the universal rectangular tube straightening device in Example 1; Figure 3 This is a schematic diagram of the working state of the straightening device for straightening the rectangular tube in Example 1; Figure 4 This is a schematic diagram of the shape-correcting stop in Example 1.

[0015] Reference numerals: 1. Correction platform; 2. Correction stop; 21. Insert post; 22. Cylinder; 23. Flat section; 24. Stepped support surface; 3. Correction stop mounting hole; 4. Pneumatic correction assembly; 41. Correction cylinder; 42. Correction push plate; 5. Rectangular tube. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, but these specific embodiments do not limit the scope of protection of the present invention in any way. Example

[0017] like Figure 1-4 As shown, the universal rectangular tube straightening device of this utility model includes a straightening platform 1, at least three straightening stops 2, and a pneumatic straightening assembly 4.

[0018] The alignment table 1 is a sturdy working platform. The table surface of the alignment table 1 is provided with multiple alignment stop mounting holes 3 arranged in an array. Each alignment stop mounting hole 3 is a circular hole, which is evenly distributed on the table surface of the alignment table 1 to provide a positioning reference for the installation of the alignment stop 2.

[0019] The straightening stop 2 is integrally formed from a post 21 and a cylinder 22. The post 21 of each straightening stop 2 is used to insert into the straightening stop mounting hole 3 to achieve positioning and installation of the stop on the straightening table 1. On the other hand, one side of the cylinder 22 of the straightening stop 2 is provided with a flat surface 23. This flat surface 23 has high flatness as the straightening surface that directly contacts the rectangular tube 5. On the other side opposite to the straightening surface, each straightening stop 2 is provided with a stepped support surface 24. The stepped support surface 24 includes three integrally formed square planes of different areas, forming a stepped structure. The stepped support surface 24 of each straightening stop 2 is used to: when the straightening operation is performed, the overturning moment generated by the reaction force on the straightening surface is effectively transmitted to the table surface of the straightening table 1 through the stepped support surface 24, preventing the straightening stop 2 from tilting or displacing under high load.

[0020] The pneumatic alignment component 4 is arranged opposite to the alignment surface of the alignment stop 2. The pneumatic alignment component 4 includes an alignment cylinder 41 and an alignment push plate 42. The alignment push plate 42 is provided with a hanging ear, and the alignment push plate 42 is hung on the output end of the alignment cylinder 41 through the hanging ear. Furthermore, the alignment cylinder 41 is fixedly installed on the alignment table 1 by a fixed bracket. The alignment push plate 42 is a flat metal plate with sufficient rigidity, which can apply the thrust evenly to the rectangular tube 5.

[0021] In a preferred embodiment, the mounting holes 3 of each straightening stop are arranged in a grid array on the surface of the straightening table 1. According to the length of the rectangular tube 5 to be straightened, the straightening stop 2 can be inserted into the mounting holes 3 with different spacing to achieve the universality of the device for rectangular tubes 5 of different specifications. Each straightening stop 2 can be quickly disassembled and reinstalled through the insertion post 21.

[0022] The working principle and method of this utility model's universal rectangular tube straightening device are as follows: When preparing for the alignment, select appropriate spacing of alignment stop mounting holes 3 on the alignment table 1 according to the width of the rectangular tube 5, and insert the insert 21 parts of at least three alignment stops 2 into the selected mounting holes respectively, ensuring that the insert 21 is fully inserted into the hole and the stepped support surface 24 is tightly attached to the table surface, thereby completing the layout and adjustment of the alignment area.

[0023] After the alignment stop 2 is installed, adjust the position of the alignment push plate 42 according to the length of the rectangular tube 5, check the air pressure setting of the pneumatic system, set the appropriate working pressure according to the material and wall thickness of the rectangular tube 5, and place the rectangular tube 5 to be aligned horizontally between the three alignment stop 2, with the curved protruding surface of the rectangular tube 5 facing the alignment push plate 42 and the flat surface fitting the alignment surface of the alignment stop 2.

[0024] Once the rectangular tube 5 is positioned, the pneumatic system is activated, and the straightening cylinder 41 begins to work. The piston rod pushes the straightening push plate 42 to move towards the straightening stop 2. After the straightening push plate 42 contacts the bending surface of the rectangular tube 5, pressure continues to be applied. Under the joint compression of the straightening push plate 42 and the straightening surface, the bending deformation of the rectangular tube 5 is gradually corrected. When the rectangular tube 5 is pressed to the predetermined position, the pressure is maintained to allow the rectangular tube 5 to undergo sufficient plastic deformation.

[0025] During the calibration process, the huge reaction force generated during calibration is effectively transferred to the calibration table 1 through the stepped support surface 24 of each calibration stop 2. The first layer of the stepped support surface 24 bears the main pressure load, and the second layer bears the edge pressure generated by the overturning moment. The two support surfaces work together to decompose the overturning moment into a distributed load on the table, so that the calibration stop 2 remains absolutely stable and will not tilt or shift, thus ensuring calibration accuracy.

[0026] Once the calibration is complete, the cylinder reverses its movement, the calibration push plate 42 returns to its original position, and the calibrated rectangular tube 5 is removed. If the first calibration does not meet the requirements, the above process can be repeated for a second calibration until the desired calibration effect is achieved.

[0027] In summary, the advantages of this utility model are that by setting an array of mounting holes for the straightening baffles on the straightening table surface, and using detachable straightening baffles, a modular layout design is achieved. This allows the device to be quickly adjusted to adapt to rectangular tubes of various widths without replacing any core components, thus shortening the changeover adjustment time.

[0028] The unique stepped support surface design of the alignment stop effectively decomposes and transmits the overturning force generated during alignment to the worktable by utilizing the principle of reaction force. This solves the technical problem that traditional adjustable stops are prone to displacement and tilting under heavy pressure, ensuring the absolute stability of the alignment process and guaranteeing high-precision alignment results. The flatness of the rectangular tube after alignment can be controlled within a high-precision range.

[0029] Furthermore, this invention is applicable to the shaping of rectangular tubes of various materials and wall thicknesses. By adjusting the working pressure of the pneumatic system, it can adapt to metal tubes of different strength grades, exhibiting wide applicability and good process adaptability. It provides an efficient, precise, and universal technical solution for the shaping of rectangular tubes.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any innovative improvements or substitutions based on this utility model should fall within the scope of the claims of this utility model. Furthermore, the parameters, materials, and processes mentioned in the above embodiments are not unique. Without departing from the technical essence of this utility model, those skilled in the art can make various alternative choices, and these alternative solutions should also be considered to fall within the scope of protection of this utility model.

Claims

1. A universal straightening device for rectangular tubes, comprising a straightening table and a pneumatic straightening assembly, wherein the pneumatic straightening assembly is disposed on the straightening table, characterized in that: The calibration table has multiple calibration stop mounting holes on its surface, and at least three calibration stop mounting holes have detachable calibration stops installed in them; the pneumatic calibration assembly includes a calibration cylinder, and the pneumatic calibration assembly is arranged opposite to the calibration surface of the calibration stop.

2. The universal rectangular tube straightening device according to claim 1, characterized in that: The alignment stop includes a post and a cylinder. The post and cylinder are integrally formed, and the alignment stop is installed on the alignment stop mounting hole through the post.

3. The universal rectangular tube straightening device according to claim 2, characterized in that: The cylinder has a shaping surface on one side and a stepped support surface on the other side.

4. The universal rectangular tube straightening device according to claim 3, characterized in that: The stepped support surface is positioned in the opposite direction of the force applied to the straightening surface, and is used to transfer the overturning moment generated during straightening to the surface of the straightening platform.

5. The universal rectangular tube straightening device according to claim 1, characterized in that: The pneumatic alignment assembly also includes an alignment push plate, which is provided with a hanging ear and connected to the output end of the alignment cylinder through the hanging ear.

6. The universal rectangular tube straightening device according to claim 5, characterized in that: The side of the alignment push plate facing the alignment stop is a planar structure.

7. The universal rectangular tube straightening device according to claim 1, characterized in that: The mounting holes of the multiple alignment stops are arranged in an array.

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