Aluminum profile straightening machine with self-positioning clamping at both ends

Abstract

The application discloses a kind of aluminium profile two-end self-positioning clamping aluminium profile straightening machine, it is related to aluminium profile straightening technical field, including track frame, main stretching frame and vice stretching frame, hydraulic drive clamping assembly and inner support plate are installed on main stretching frame and vice stretching frame, for providing pressure to carry out aluminium profile two-end compression;The present application aims at solving the technical problems that lack lateral constraint in the stretching process of prior art, it is difficult to suppress profile bending deformation and local instability, by setting the distributed buffer mechanism that moves synchronously with vice stretching frame in the side of main and vice stretching frame, it is always followed by the "limiting passage" of stretching end, the lateral wall of profile is forced to be constrained, material is forced to strictly plastic elongation along axial direction, so as to effectively straighten complex bending such as sickle-shaped bending, prevent thin wall part from waving or buckling simultaneously, significantly improve straightening accuracy and process adaptability.

Description

Technical Field

[0001] This invention relates to the field of aluminum profile straightening technology, specifically to an aluminum profile straightening machine that self-positions and clamps both ends of the aluminum profile. Background Technology

[0002] After extrusion molding, prestressed aluminum profiles often develop deformation defects such as bending, twisting or sickle bending along the length due to uneven stress distribution in the cross section and differences in cooling shrinkage. These defects must be corrected by straightening process. As a key post-processing equipment in the aluminum profile production line, the straightening machine usually works by clamping the two ends of the profile with two clamping devices and applying axial tension to make the profile plastically elongate to achieve the purpose of straightening. In recent years, the industry has carried out a series of technical improvements to the automation and clamping reliability of straightening machines. For example, the patent with publication number CN212384327U proposes a driven pull head for a straightening machine, which realizes the rapid clamping and automatic pressing of aluminum profiles through the linkage design of the clamping push rod and the clamping plate. The patent with publication number CN220611800U discloses an aluminum profile straightening device that uses a friction locking tail hook assembly to replace the traditional gear and rack locking method, so that the locking force increases with the increase of tensile load, thereby improving the clamping stability of large cross-section profiles. However, the aforementioned existing technologies mainly focus on improving the reliability of end clamping, automating loading and unloading, and improving centering and positioning accuracy. They have not yet proposed an effective solution for the lateral instability of the profile body, especially thin-walled, wide, or low-hardness aluminum alloy profiles, during the stretching process. In actual production, when there is initial bending during stretching, the axial tensile force will generate a non-negligible lateral component force, which can easily cause the profile to buckle locally, wavy, or deform in cross section during the stretching process, seriously affecting the straightening accuracy and yield. Although some clamping devices attempt to deal with the torque during the stretching process by arranging multiple jaws, they still fall under the category of end clamping and cannot provide effective constraints on the lateral deformation along the entire length of the profile. To address this, we propose an aluminum profile straightening machine with self-positioning clamping at both ends. Summary of the Invention

[0003] The purpose of this invention is to provide an aluminum profile straightening machine with self-positioning clamping at both ends, thereby solving the problems mentioned in the background art; To achieve the above objectives, the present invention provides the following technical solution: an aluminum profile straightening machine with self-positioning clamping at both ends, comprising a track frame, a main stretching frame and a secondary stretching frame, wherein the main stretching frame and the secondary stretching frame are equipped with hydraulically driven clamping components and inner support plates for providing pressure to press the two ends of the aluminum profile. The main tensioning frame and the auxiliary tensioning frame are equipped with lifting and conveying components on the inner support plate side. The lifting and conveying components can move up and down by connecting to the hydraulic components, and automatically feed aluminum profiles by rotating the transmission toothed chain. A rotating rod is provided through the sprocket side of the lifting and conveying components on both sides, and a follow-up trolley is provided on the track frame on the side of the rotating rod. A distributed buffer mechanism is installed on the follow-up trolley. The distributed buffer mechanism includes a lifting platform that can move up and down inside a follower trolley. An active slide and a driven slide are equally slidably connected inside the lifting platform. Limiting roller sleeves are symmetrically slidably connected to the active slide and the driven slide. A clamp is provided on the top of the lifting platform corresponding to the active slide and the driven slide. A buffer frame is abutted against by the limiting roller sleeve on the clamp side. An inner limiting sleeve is installed on the clamp on the buffer frame side to limit the movement of the buffer frame.

[0004] Furthermore, the inner limiting sleeve can slide on the clamp along the axial direction, and the inner wall is provided with grooves corresponding to the side wall of the buffer frame. The inner limiting sleeve is moved upward by the limiting roller sleeve to complete the misalignment of the grooves corresponding to the side wall of the buffer frame, thereby realizing the release of the limiting between the inner limiting sleeve and the buffer frame.

[0005] Furthermore, the inner wall of the lifting platform is slidably connected to an active slide and multiple driven slides. A drive screw movably connected to the inner wall of the lifting platform passes through the driven slide and is threadedly connected to the active slide. The multiple driven slides are driven to unfold at equal intervals by the movement of the active slide and the connected folding rod.

[0006] Furthermore, a second drive screw is installed inside the driven slide and the active slide and on the limiting roller sleeve. The rotation of the second drive screw completes the movement of the two limiting roller sleeves in opposite directions. A threaded sleeve is provided inside the lifting platform, and the rotating rod passes through the threaded sleeve and is slidably connected to it. The teeth on the outer wall of the threaded sleeve mesh with the gear at the end of the second drive screw.

[0007] Furthermore, the main tensioning frame and the secondary tensioning frame are rotatably connected to a stop arm on opposite sides, and a hydraulic grab hook is installed on the other side of the secondary tensioning frame. The grab hook is driven by a hydraulic cylinder to support and engage the track frame.

[0008] Furthermore, a hydraulic system is installed on the track frame on the side of the main stretching frame, and a pulling platform is installed on the track frame on the side of the hydraulic system. One side of the pulling platform is connected to the main stretching frame. The hydraulic system consists of a hydraulic station, an oil pump, various control valves and pipelines, providing high-pressure hydraulic oil as a power source for the straightening machine.

[0009] The self-positioning and clamping operation method for both ends of aluminum profiles using an aluminum profile straightening machine is as follows: The follow-up trolley and the auxiliary stretching frame move synchronously. The lifting and conveying assembly moves the aluminum profile towards the middle of the device. After being limited by the stop arm, the inner support plate and the hydraulically driven clamping assembly work to clamp both ends of the aluminum profile. At the same time, the continuously rotating lifting and conveying assembly drives the threaded sleeve to rotate, completing the second rotation of the drive screw, realizing the opposite movement of multiple sets of clamping upper limit roller sleeves. At the same time, the drive buffer frame clamps the side wall of the aluminum profile after it has been placed and positioned. After stretching, the aluminum profile on the conveying assembly is pushed out by rotating the stop arm 180 degrees in the opposite direction.

[0010] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention constructs a "restricted passage" that always follows the movement of the stretching end by setting a follow-up trolley that moves synchronously with the secondary stretching frame on the side of the main and secondary stretching frames and integrating a distributed buffer mechanism on it. After the two ends of the profile are clamped, the mechanism forcibly constrains the side wall of the profile through multiple sets of buffer frames, completely restricting the lateral degree of freedom that may be generated during the stretching process, forcing the material to strictly plastically elongate along the axial direction, thereby eliminating the lateral component force generated by the initial bending of the profile. This design improves the stability of the "pure stretching" straightening process to a new level, can effectively straighten complex bending deformations that are difficult to handle by traditional equipment, and significantly improves the straightening accuracy and yield. 2. This invention sets up an active slide and multiple driven slides inside the lifting platform. Through the linkage of the drive screw and the folding rod, the distance between the slides can be adjusted proportionally and precisely. For thin-walled profiles and other low-hardness aluminum alloy profiles, the distance between the slides can be shortened, the support points on the side walls can be increased, the tensile stress can be effectively dispersed, and the buckling and wave-like instability caused by local stress concentration can be prevented. For large-section thick-walled profiles, the distance can be increased to reduce unnecessary friction interference. This adaptive adjustment mechanism enables the equipment to flexibly adapt to profiles with different cross-sectional specifications and rigidity characteristics, which significantly broadens the process application range of the equipment. 3. This invention utilizes a rotating rod that passes through and synchronously rotates the lifting and conveying assembly. Combined with the constant meshing transmission between the threaded sleeve and the second drive screw, this achieves a purely mechanical, sequential linkage between the profile conveying action and the lateral clamping action of the buffer frame. This design requires no additional sensors, electrical control systems, or independent power sources. It automatically completes the synchronous, opposite clamping of multiple sets of buffer frames while the profile is conveyed to the predetermined position and clamped at both ends. This linkage mechanism greatly simplifies the complexity of the control system, improves action coordination and response speed, and simultaneously reduces manufacturing costs and subsequent maintenance difficulty. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the aluminum profile straightening machine with self-positioning clamping at both ends of the aluminum profile according to the present invention; Figure 2This is a top view of the aluminum profile straightening machine with self-positioning clamping at both ends of the aluminum profile according to the present invention. Figure 3 This is a schematic diagram of the installation structure of the follower trolley on the auxiliary tension frame side of the present invention; Figure 4 This is a schematic diagram of the installation structure of the distributed buffer structure on the follower trolley of the present invention; Figure 5 This is a schematic diagram of the installation structure of the inner limiting sleeve and buffer frame on the side of the limiting roller sleeve of the present invention; Figure 6 This is a schematic diagram of the present invention showing how the rotating rod drives the threaded sleeve to rotate and completes the rotation of the lead screw. Figure 7 This is a schematic diagram of the buffer frame of the present invention moving unidirectionally within the inner limiting sleeve.

[0012] In the diagram: 1. Track frame; 2. Main tension frame; 3. Secondary tension frame; 4. Hydraulic drive clamping assembly; 5. Inner support plate; 6. Stop arm; 7. Lifting and conveying assembly; 8. Rotating rod; 9. Follow-up trolley; 10. Distributed buffer mechanism; 101. Lifting platform; 102. Active slide table; 103. Driven slide table; 104. Limiting roller sleeve; 105. Drive screw one; 106. Clamp; 107. Inner limiting sleeve; 108. Buffer frame; 11. Drive screw two; 12. Folding rod; 13. Threaded sleeve; 14. Hydraulic grab hook; 15. Hydraulic system; 16. Pulling table. Detailed Implementation

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

[0014] Please see Figure 1-7 The present invention provides a technical solution: Example 1: Construction and operation of a follow-up lateral constraint mechanism. This invention addresses the technical pain points of traditional aluminum profile straightening machines when processing slender, thin-walled profiles or profiles with complex deformations such as sickle bends and side bends. These problems include poor straightening effect and easy instability of the cross section due to the single clamping method and insufficient lateral support. The invention proposes an aluminum profile self-positioning clamping and straightening machine with a follow-up distributed buffer mechanism. Its core is to construct a "restricted channel" that moves synchronously with the auxiliary stretching frame. Through dynamically adjusted lateral auxiliary clamping, the lateral degree of freedom of the profile is forcibly constrained during the stretching process, forcing the material to strictly plastically extend along the axial direction, thus fundamentally eliminating the straightening blind zone caused by lateral force. Specifically, such as Figure 1 and Figure 2 As shown, the main structure of this system includes a main tension frame 2 and a secondary tension frame 3 that are slidably set along the track frame 1. The track frame 1 serves as a basic support platform to ensure the smooth opposite movement of the two tension frames. At the same time, the structure of the track frame 1 at the bottom of the main tension frame 2 and the secondary tension frame 3 is different depending on the action, but neither of them affects the subsequent trolley action. Additionally, a follow-up trolley 9 can be installed on the track frame 1, that is, a follow-up trolley 9 is set on each side of the main tension frame 2 and the secondary tension frame 3, making the straightening of the equipment more stable. A hydraulic system 15 is integrated on the track frame 1 on both sides of the main stretching frame 2. The system consists of a hydraulic station, oil pump, control valve group and pipeline, which provides high pressure hydraulic oil as the power source for the whole machine. A pulling table 16 is installed on the track frame 1 on the side of the hydraulic system 15. One end of the pulling table 16 is fixedly connected to the main stretching frame 2. Driven by the hydraulic system 15, the main stretching frame 2 can achieve precise stretching action along the track frame 1. A hydraulic gripper 14 is installed on the side of the auxiliary stretching frame 3 facing away from the main stretching frame 2. When the auxiliary stretching frame 3 travels on the track frame 1 to the predetermined station according to the actual length of the aluminum profile to be straightened, the hydraulic gripper 14 is firmly engaged with the track frame 1 under the drive of the hydraulic cylinder, forming a strong tensile reaction support to ensure the stability and reliability of the stretching process. At the clamping execution end, both the main stretching frame 2 and the auxiliary stretching frame 3 are equipped with hydraulically driven clamping components 4 and inner support plates 5. The hydraulically driven clamping components 4 provide strong clamping force, which, together with the inner support plates 5, enables bidirectional reliable clamping of the aluminum profile ends, effectively preventing the profile ends from slipping or being locally crushed during the stretching process, and laying the clamping foundation for subsequent high-precision stretching. A stop arm 6 is also rotatably connected to the opposite surfaces of the main stretching frame 2 and the auxiliary stretching frame 3. The stop arm 6 performs a limiting abutment when the profile is conveyed to the predetermined position, and performs axial limiting of the profile to ensure that the clamping positions at both ends are consistent, providing a position reference for self-positioning clamping. To address the lack of lateral support in traditional equipment during the stretching process, this system innovatively installs a lifting and conveying assembly 7 on the same side of the main stretching frame 2 and the auxiliary stretching frame 3 located on the inner support plate 5. A distributed buffer mechanism 10 is integrated on the follower trolley 9 that moves synchronously with the auxiliary stretching frame 3. This follower design ensures that the lateral support points always move with the stretching end, providing continuous lateral constraint throughout the stretching process regardless of the profile length. like Figure 3 and Figure 4 As shown, the lifting and conveying assembly 7 can be driven to lift the whole through the built-in hydraulic components, and the aluminum profile is automatically fed by the rotation of the sleeved transmission tooth chain. Considering the structural distribution of the lifting and conveying assembly 7, which is high on both sides and low in the middle, after the tooth chain pushes the profile to the highest point, the profile automatically falls into the middle of the lifting and conveying assembly 7. Subsequent unloading is achieved by the reverse rotating baffle arm 6. When the profile is conveyed to near the working position, the stop arm 6 is stopped, and then the inner support plate 5 and the hydraulically driven clamping assembly 4 move to complete the initial clamping and positioning of both ends of the profile. It is worth noting that a rotating rod 8 is installed through the sprocket side of the lifting and conveying assembly 7 on both sides. The rotating rod 8 rotates synchronously with the continuous operation of the lifting and conveying assembly 7, providing a power source for the subsequent lateral clamping action, realizing the timing linkage between the conveying and clamping actions, simplifying the control system. At the same time, the continuous rotation of the entire lifting and conveying assembly 7 will not affect the position of the profile. like Figure 4 , Figure 5 and Figure 6 As shown, the specific structure of the distributed buffer mechanism 10 includes: a lifting platform 101 that can move up and down inside the follower trolley 9. The height of the lifting platform 101 can be adjusted hydraulically to adapt to the center height of different cross-section profiles. The lifting platform 101 has one active slide 102 and multiple driven slides 103 that are equally slidably connected inside. This application shows one active slide 102 and two driven slides 103 for the time being, and more can be added later as needed. The drive screw 105 that is movably connected to the inner wall of the lifting platform 101 passes through the driven slide 103 and is threadedly connected to the active slide 102. When it is necessary to adjust the lateral support density according to the rigidity characteristics of the profile, the drive screw 105 is rotated, and the axial movement of the active slide 102 and the folding rod 12 hinged to it are used to drive the subsequent multiple driven slides 103 to unfold or retract at equal intervals. This design brings significant technical benefits: for thin-walled profiles or low-hardness aluminum alloy profiles such as 6063, the distance between the slides can be shortened, which is equivalent to increasing the density of the support points on the sidewalls. This can effectively prevent local buckling or wavy phenomena caused by the concentration of compressive stress or local tensile stress in the thin-walled parts of the profile during the stretching process. In particular, for wide thin-walled profiles, this increased support can offset the tendency of cross-sectional shrinkage caused by the Poisson effect during stretching and maintain the stability of the cross-sectional shape. For large cross-section thick-walled profiles, the distance can be increased to avoid unnecessary friction interference, demonstrating a high degree of process adaptability. A limiting roller sleeve 104 is symmetrically slidably connected to the active slide 102 and the driven slide 103. A clamp 106 is fixedly installed on the top of the lifting platform 101 corresponding to the active slide 102 and the driven slide 103. When the limiting roller sleeve 104 slides inside the slide, it can abut against the buffer frame 108 provided on the side of the clamp 106. An inner limiting sleeve 107 is provided on the side of the buffer frame 108 facing the clamp 106. In the initial state, the inner limiting sleeve 107 engages with the texture of the side wall of the buffer frame 108 to achieve unidirectional locking of the movement of the buffer frame 108. Figure 7 As shown, the limiting roller sleeve 104 drives the buffer frame 108 to move to the right, while the buffer frame 108 is limited by the inner limiting sleeve 107 and cannot move to the left. Drive screw 11 is installed through the driven slide 103 and the active slide 102. The screw is designed with a two-way thread and is used to drive the two limit roller sleeves 104 on the same slide to move precisely in opposite directions or in opposite directions. The lifting platform 101 is also equipped with a threaded sleeve 13. The rotating rod 8 passes through the threaded sleeve 13 and is slidably connected to it. The teeth on the outer wall of the threaded sleeve 13 are in constant mesh with the gear at the end of the drive screw 11. When the rotating rod 8 is driven to rotate by the lifting and conveying assembly 7, the torque is transmitted to the drive screw 11 through the threaded sleeve 13. The rotation of the drive screw 11 then drives the limiting roller sleeves 104 on the multiple sets of clamps 106 to move synchronously in opposite directions. When the buffer frame 108 needs to be reset, the limiting roller sleeve 104 first contacts the oblique surface on the inner wall of the inner limiting sleeve 107 during the movement process, pushing the inner limiting sleeve 107 to slide upward along the clamp 106, causing the inner side texture of the inner limiting sleeve 107 to axially disengage from the outer wall texture of the buffer frame 108, thus releasing the locking of the buffer frame 108. The buffer frame 108 is retracted by the internally installed tension spring, causing it to disengage from the clamping of the aluminum profile sidewall. After multiple buffer frames 108 have clamped the profile sidewall, a densely arranged follow-up "restriction channel" is formed on both sides of the profile, which forcibly constrains the profile sidewall. The technical effect of this constraint mechanism is that it completely restricts the lateral degree of freedom that may have been generated during the stretching process, forcing the material to only stretch along the axial direction, thereby avoiding the lateral component of the tensile force generated by the initial bending of the profile. This is equivalent to raising the process stability of "pure stretching" to a new level, and can effectively straighten those complex bending deformations that are difficult to handle on traditional equipment. After stretching, the stop arm 6 rotates 180 degrees in the opposite direction, contacting and pushing the straightened aluminum profile away from the lifting and conveying assembly 7, as shown. Figure 3 As shown, at this time, the stop arm 6 begins to rotate clockwise, contacts the straightened profile, and completes the automatic feeding of the profile, ending the entire cycle.

[0015] Example 2: Based on Example 1 above, this example further elaborates on the multi-level linkage adaptive adjustment mechanism of the distributed buffer mechanism 10. This mechanism enables the system to achieve precise lateral support for aluminum profiles with different cross-sectional specifications and different rigidity characteristics without adding additional power sources and control points. Specifically, the core linkage logic of this system lies in the coordinated operation between the rotating rod 8, the threaded sleeve 13, the second drive screw 11, and the first drive screw 105. like Figure 6As shown, the rotating rod 8 serves as the power input end, and its rotation speed maintains a strict proportional relationship with the conveying speed of the lifting and conveying assembly 7. When the lifting and conveying assembly 7 operates to feed materials, the torque of the rotating rod 8 is transmitted to the drive screw 11 through the threaded sleeve 13. Since the drive screw 11 adopts a bidirectional thread design, its forward and reverse rotation will precisely drive the two limit roller sleeves 104 on the same slide to move towards or away from each other. This purely mechanical linkage design does not require additional sensors and electrical control, which greatly improves the reliability and response speed of the system and reduces manufacturing costs and maintenance difficulties. To address the adjustment of support density required for different profile rigidities, this system utilizes a drive screw 105. The drive screw 105 forms a threaded transmission pair only with the active slide 102, while it has a sliding fit with the driven slide 103. When the operator rotates the drive screw 105 according to process requirements, the active slide 102 moves axially, which in turn pushes the subsequent driven slides 103 to unfold or retract sequentially via the hinged folding rod 12, achieving a proportional change in the support point spacing. For example, when dealing with large-section, thick-walled profiles used in building curtain walls, the spacing can be increased to reduce the contact length between the buffer frame 108 and the profile surface, thereby reducing frictional losses. When processing slender, thin-walled profiles for rail transit, the spacing is adjusted to the minimum to provide near-continuous dense lateral support. This dense support can effectively disperse tensile stress, prevent buckling instability caused by local stress concentration, and significantly improve the yield. Furthermore, the one-way locking and automatic unlocking mechanism of the buffer frame 108 and the inner limiting sleeve 107 is another key to the efficient cyclic operation of this system. Figure 7 As shown, the inner limiting sleeve 107 is locked to the buffer frame 108 through grooves in the non-working state to prevent it from shifting due to vibration during the movement of the follower trolley 9. When the limiting roller sleeve 104 is pushed forward, it pushes the buffer frame 108 to clamp the profile. When the stretching ends and the limiting roller sleeve 104 retracts, it pushes the inner limiting sleeve 107 again, so that the inner limiting sleeve 107 is in an unlocked state, creating conditions for the free retraction of the buffer frame 108. This automatic cycle of "push-clamp-retract-unlock-reset" makes the entire lateral clamping process fully automated. Moreover, the reverse force generated by the profile is directly applied to the inner limiting sleeve 107 on the side of the buffer frame 108. Compared with the vertically distributed limiting roller sleeve 104, which is in direct contact and is prone to deformation and damage to the drive screw, the inner limiting sleeve 107 is more effective. In summary, this system achieves precise linkage between the conveying action of the lifting and conveying component 7 and the spacing adjustment and clamping action of the distributed buffer mechanism 10 through a series of mechanical transmission components such as the rotating rod 8, threaded sleeve 13, drive screw 2 11, and drive screw 105. Without adding an additional power source and control system, it completes the synchronous automation of profile conveying, positioning, and multi-point adaptive lateral clamping. This integrated design makes the system highly compatible with the aluminum profile straightening production process, without creating additional process bottlenecks. It has outstanding advantages such as compact structure, coordinated action, high control precision, low operating cost, and simple maintenance, and has achieved a significant improvement in the straightening accuracy and profile adaptability of the aluminum profile straightening process.

[0016] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0017] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0018] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An aluminum profile straightening machine with self-positioning clamping at both ends, comprising a track frame (1), a main stretching frame (2), and a secondary stretching frame (3), characterized in that, The main tensioning frame (2) and the auxiliary tensioning frame (3) are equipped with hydraulically driven clamping components (4) and inner support plates (5) to provide pressure for clamping the two ends of the aluminum profile; The main tensioning frame (2) and the auxiliary tensioning frame (3) are equipped with lifting and conveying components (7) on the side of the inner support plate (5). The lifting and conveying components (7) can move up and down by connecting to the hydraulic components, and automatically feed aluminum profiles by rotating the transmission toothed chain. The sprocket side of the lifting and conveying components (7) on both sides is provided with a rotating rod (8), and a follower trolley (9) is provided on the track frame (1) on the side of the rotating rod (8). A distributed buffer mechanism (10) is installed on the follower trolley (9). The distributed buffer mechanism (10) includes a lifting platform (101) that can move up and down inside the follower trolley (9). The lifting platform (101) is equally connected to an active slide (102) and a driven slide (103). The active slide (102) and the driven slide (103) are symmetrically connected to a limiting roller sleeve (104). A clamp (106) is provided on the top of the lifting platform (101) corresponding to the active slide (102) and the driven slide (103). The limiting roller sleeve (104) is abutting against a buffer frame (108) on the side of the clamp (106). An inner limiting sleeve (107) is installed on the clamp (106) on the side of the buffer frame (108) to limit the movement of the buffer frame (108).

2. The aluminum profile straightening machine with self-positioning clamping at both ends as described in claim 1, characterized in that, The inner limiting sleeve (107) can slide on the clamp (106) along the axial direction, and the inner wall is provided with grooves corresponding to the side wall of the buffer frame (108). The inner limiting sleeve (107) is moved to the top by the limiting roller sleeve (104) to complete the misalignment of the grooves corresponding to the side wall of the buffer frame (108), thereby realizing the release of the limiting between the inner limiting sleeve (107) and the buffer frame (108).

3. The aluminum profile straightening machine with self-positioning clamping at both ends as described in claim 2, characterized in that, The inner wall of the lifting platform (101) is slidably connected to an active slide (102) and multiple driven slides (103). A drive screw (105) movably connected to the inner wall of the lifting platform (101) passes through the driven slide (103) and is threadedly connected to the active slide (102). The multiple driven slides (103) are equidistantly unfolded by the movement of the active slide (102) and the connected folding rod (12).

4. The aluminum profile straightening machine with self-positioning clamping at both ends as described in claim 3, characterized in that, The driven slide (103) and the active slide (102) are equipped with a second drive screw (11) located on the limiting roller sleeve (104). The two limiting roller sleeves (104) are moved towards each other or away from each other by rotating the second drive screw (11). A threaded sleeve (13) is provided in the lifting platform (101), and the rotating rod (8) passes through the threaded sleeve (13) and is slidably connected to it. The teeth on the outer wall of the threaded sleeve (13) mesh with the gear at the end of the second drive screw (11).

5. The aluminum profile straightening machine with self-positioning clamping at both ends as described in claim 4, characterized in that, The main tension frame (2) and the auxiliary tension frame (3) are rotatably connected with a baffle arm (6). A hydraulic grab hook (14) is installed on the other side of the auxiliary tension frame (3). The grab hook is driven by a hydraulic cylinder to support and clamp the track frame (1).

6. The aluminum profile straightening machine with self-positioning clamping at both ends as described in claim 5, characterized in that, A hydraulic system (15) is installed on the track frame (1) on the side of the main stretching frame (2), and a pulling platform (16) is installed on the track frame (1) on the side of the hydraulic system (15). One side of the pulling platform (16) is connected to the main stretching frame (2). The hydraulic system (15) consists of a hydraulic station, an oil pump, various control valves and pipelines, and provides high-pressure hydraulic oil as a power source for the straightening machine.

7. The aluminum profile straightening machine with self-positioning clamping at both ends as described in claim 6, characterized in that, The self-positioning and clamping operation method for both ends of aluminum profiles using an aluminum profile straightening machine is as follows: The follower trolley (9) moves synchronously with the auxiliary tensioning frame (3), and the lifting conveying assembly (7) moves the aluminum profile to the middle of the device. After being limited by the stop arm (6), the inner support plate (5) and the hydraulic drive clamping assembly (4) work to clamp the two ends of the aluminum profile. At the same time, the continuously rotating lifting conveying assembly (7) drives the threaded sleeve (13) to rotate, and completes the rotation of the second drive screw (11), realizing the opposite movement of the upper limit roller sleeve (104) of multiple sets of clamps (106). At the same time, the drive buffer frame (108) clamps the side wall of the aluminum profile after it is placed and positioned. After stretching, the aluminum profile is pushed out by rotating the baffle arm (6) 180 degrees in the opposite direction to contact the lifting conveyor assembly (7).

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