Multi-shaft profile steel automatic cold-bending machine for steel arch production and working method of multi-shaft profile steel automatic cold-bending machine

Abstract

The invention relates to the technical field of profile machining, in particular to a multi-shaft profile steel automatic cold bending machine for steel arch production and a working method, and the multi-shaft profile steel automatic cold bending machine comprises a working platform, a conveying assembly and a jacking assembly. Specifically, a cold bending station is arranged on the working platform; the conveying assembly is arranged on the working platform and used for conveying profile steel to the cold bending station in the length direction of the profile steel. The top pressing assembly is arranged at the cold bending station and comprises a top pressing roller and a first telescopic driving part, the top pressing roller abuts against the profile steel output by the conveying assembly in a rolling mode, and the first telescopic driving part is used for driving the top pressing roller to move in the direction inclined or perpendicular to the conveying direction of the profile steel. The device has the effect of improving the profile steel cold bending machining efficiency and the product quality of finished steel arches.

Description

Technical Field

[0001] This application relates to the field of profile processing technology, and in particular to a multi-axis automatic cold bending machine for steel arch frame production and its working method. Background Technology

[0002] In the construction of tunnels, mine roadways, and underground caverns, steel arches are widely used as an important support component to support surrounding rock and ensure construction safety. Steel arches are usually made of specific types of I-beams, H-beams, or U-beams through cold bending. Their contours need to be precisely matched with the design cross-sectional shape of the tunnel to ensure good stress distribution and support effect.

[0003] Currently, the production of steel arch frames mainly relies on cold bending technology. The process is roughly as follows: first, straight steel sections are fed into cold bending equipment, and pressure is applied through molds or rollers to cause plastic deformation at room temperature. For example, patent CN214391792U discloses a cold bending machine for I-beams: it includes a processing platform, a control box, a feeding mechanism, a jacking mechanism, and bending and fixing mechanisms evenly distributed along the conveying direction of the I-beam. The bending and fixing mechanism includes a fixed frame, a support roller horizontally positioned between two vertical sections of the fixed frame, the I-beam mounted on the support roller, and an adjusting roller parallel above the support roller. Both the support roller and the adjusting roller are coaxially inserted by round shafts, with both ends of the round shafts of the support roller fixed to the vertical sections of the fixed frame. Slide grooves are provided on the inner ends of both vertical sections of the fixed frame for adjusting the height of the adjusting roller.

[0004] However, in the aforementioned technologies, when the jacking mechanism drives the passive push rollers to cold-bend the steel profile, both ends of the steel profile swing in the opposite direction of the jacking mechanism's jacking direction. Therefore, before cold bending, the longer finished steel profiles need to be cut into sections to a predetermined length, and then cold-bent one by one using a cold bending machine. This processing method requires multiple steps such as loading, positioning, cold bending, and unloading to produce a single steel arch. Furthermore, when multiple different arcs need to be formed on a single steel profile, multiple cold bending operations are required, resulting in low production efficiency and hindering continuous production. Additionally, due to its working principle, the finished steel arch formed by cold bending is not a complete arc, but rather exhibits a shape that is curved in the middle and straight at both ends. This leads to a decrease in the overall quality of the steel arch and a reduction in its load-bearing capacity. Summary of the Invention

[0005] In order to improve the efficiency of cold bending of steel profiles and the product quality of finished steel arch frames, this application provides a multi-axis automatic cold bending machine for steel profiles and its working method.

[0006] The technical solution provided in this application for a multi-axis automatic cold bending machine for steel arch frame production is as follows: A multi-axis automatic cold bending machine for steel arch frame production includes: The work platform is equipped with a cold bending station; A conveying assembly, located on the working platform, is used to convey steel sections along the length of the steel section to the cold bending station; A top-pressing assembly is provided at the cold bending station. The top-pressing assembly includes a top-pressing roller and a first telescopic drive member. The top-pressing roller is used to roll against the steel section output by the conveying assembly. The first telescopic drive member is used to drive the top-pressing roller to move in a direction that is inclined or perpendicular to the conveying direction of the steel section.

[0007] By adopting the above technical solution, the efficiency of cold bending of structural steel and the product quality of finished steel arch frames are improved. Specifically, through the conveying and pressing components, the structural steel is continuously conveyed along its length while being subjected to a thrust applied by the pressing rollers in the pressing component, either inclined or perpendicular to the conveying direction, to achieve continuous cold bending. This allows the structural steel to continuously enter the cold bending station for processing, and after processing, it is cut into sections by the cutting equipment, realizing continuous operation. At the same time, by simply controlling the extension of the first telescopic drive component, multiple connected arcs can be formed on a single structural steel section, greatly improving production efficiency and making it suitable for automated production lines. Furthermore, because the structural steel is continuously subjected to bending force during the conveying process, the structural steel can be effectively cold-bent from beginning to end, resulting in a complete arc shape in the finished steel arch frame. This avoids the overall quality reduction and load-bearing capacity reduction caused by straight ends, significantly improving product quality.

[0008] Optionally, the top pressing assembly further includes a first slide rail and a first slide block; the first slide rail is fixedly connected to the working platform, the first slide block is slidably connected to the first slide rail, and the sliding direction of the first slide block is inclined or perpendicular to the conveying direction of the steel section; the first slide block is connected to the output end of the first telescopic drive component, and the top pressing roller is disposed on the first slide block.

[0009] By adopting the above technical solution, the movement path of the top pressure roller is strictly limited to a straight line inclined or perpendicular to the steel conveying direction through the precise sliding connection between the first slide block and the first slide rail. This avoids the possible offset or vibration of the first telescopic drive component during telescopic movement, ensuring that the thrust applied by the top pressure roller to the steel is constant in direction and stable in effect, significantly improving the stability and consistency of the cold bending forming curvature of the steel.

[0010] Optionally, the top-pressing assembly further includes multiple sliders and multiple elastic elements; the first slide block has multiple grooves, and the multiple sliders correspond one-to-one with the multiple grooves. The sliders are slidably disposed in the grooves, and the sliding direction of the sliders is inclined or perpendicular to the conveying direction of the steel section; multiple top-pressing rollers are provided, and the multiple top-pressing rollers are rotatably connected to the multiple sliders one-to-one, for pressing against the same side of the steel section along the extension direction of the steel section; the multiple elastic elements correspond one-to-one with the multiple sliders, and the elastic elements are used to make the sliders tend to move outward from the grooves; the reaction force generated by the bending of the steel section can be jointly borne by the multiple top-pressing rollers.

[0011] By adopting the above technical solution, the bending curvature of the steel profile changes when the top pressure roller rolls against the protruding structure on the surface of the finished steel profile. By designing multiple top pressure rollers to elastically roll against the steel profile surface and apply bending force, when a single top pressure roller rolls against the protruding structure, the elastic element acts as a buffer, allowing the top pressure roller to retract into the groove along with the slider connected to it, thus achieving "flexible avoidance" of the protruding structure. Simultaneously, the remaining top pressure rollers that do not contact the protruding structure bear the bending force applied to the steel profile. This "flexible avoidance" design greatly reduces the impact and influence of the protruding structure on the uniformity of the cold bending curvature of the steel profile, resulting in a smoother bending curvature and smaller deviations. Furthermore, the multiple top pressure rollers jointly bearing the reaction force generated by the bending of the steel profile effectively reduces the springback after bending, further improving the accuracy of continuous cold bending of the steel profile and the product quality of the finished steel arch frame.

[0012] Optionally, the conveying assembly includes multiple support rollers, multiple conveying rollers, and a driving component; the multiple support rollers are rotatably arranged relative to the working platform and are used to roll against the bottom surface of the steel section to support the steel section, the rotation axis of the support rollers is parallel to the horizontal plane and perpendicular to the conveying direction of the steel section; the top pressure roller rolls against the first outer side surface of the steel section; among the multiple conveying rollers, at least one conveying roller rolls against the first outer side surface of the steel section, and at least one conveying roller rolls against the second outer side surface of the steel section; when the multiple conveying rollers and the top pressure roller roll against the steel section, the displacement of the portion of the steel section that is rolled against by the conveying rollers is limited in the bending plane of the steel section along an inclined or perpendicular direction to the length direction of the steel section; the driving component is used to drive at least one of the conveying rollers to rotate.

[0013] By employing the above technical solution, multiple conveying rollers cooperate with the top pressure roller to achieve directional and stable conveying of the steel profile. Simultaneously, they collectively apply restraint to the steel profile, effectively preventing tilting or displacement perpendicular to its length within the bending plane when the top pressure roller applies the thrust required for cold bending. This ensures the posture stability of the steel profile during cold bending, providing a foundation for achieving precise and high-quality bending curvature. Multiple support rollers provide stable bottom support for the steel profile, enabling it to be supported during conveying.

[0014] Optionally, an adjustment assembly is also included, comprising a second slide rail, a second slide block, and a second telescopic drive member; the second slide rail is fixedly connected to the working platform, the second slide block is slidably connected to the second slide rail, and the sliding direction of the second slide block is inclined or perpendicular to the conveying direction of the steel section; among the plurality of conveying rollers, the conveying roller that rolls against the first outer side and / or the second outer side of the steel section is rotatably connected to the second slide block, and the second telescopic drive member is used to drive the second slide block to slide along the extension direction of the second slide rail.

[0015] By adopting the above technical solution, the distance between the conveying rollers on the first and second outer sides of the abutting steel section can be adjusted, so that the conveying assembly can easily adapt to the conveying of steel sections of different widths without the need for cumbersome mechanical adjustments when the steel section specifications change. This greatly enhances the versatility and applicability of the equipment and reduces the time cost of production line changeover.

[0016] Optionally, a limiting component is also included, which includes a limiting roller; the limiting roller is rotatably configured relative to the working platform and is used to roll against the top surface of the steel section, and the rotation axis of the limiting roller is parallel to the rotation axis of the supporting roller.

[0017] By adopting the above technical solution, the limiting roller, support roller, and conveying roller work together to form a comprehensive limiting system for the steel profile in four directions: up, down, left, and right. This not only restricts the displacement of the steel profile within the bending plane but also further restricts its movement or torsion along the direction inclined to the bending plane. This ensures that the steel profile maintains a precise feeding posture even when subjected to the bending force applied by the top pressure assembly, further improving the stability and accuracy of the bending curvature during the cold bending process of the steel profile.

[0018] Optionally, the limiting assembly further includes a mounting bracket, a third slide block, and a lead screw; the mounting bracket is fixedly connected to the work platform, the third slide block is slidably connected to the mounting bracket, and the sliding direction of the third slide block is inclined or perpendicular to the conveying direction of the steel section; the limiting roller is rotatably connected to the third slide block, the lead screw is threadedly connected to the mounting bracket, and the lead screw is fixedly connected to the third slide block, and the rotation axis of the lead screw is parallel to the sliding direction of the third slide block.

[0019] By adopting the above technical solution, when processing steel sections of different heights, the vertical distance between the limiting roller and the supporting roller can be easily adjusted by rotating the lead screw, ensuring close contact with the top surface of the steel section. This, combined with the adjustment components, achieves strong adaptability and stable limiting for steel sections of different specifications, further enhancing the equipment's versatility.

[0020] Optionally, a handwheel is coaxially fixedly connected to the lead screw.

[0021] By adopting the above technical solution, operators can accurately control the height of the limit roller by turning the handwheel without complicated tools or electronic control systems, making the operation convenient and the structure reliable.

[0022] Optionally, the driving component includes a servo motor and a reducer, wherein the output shaft of the servo motor is driven to the input shaft of the reducer, and the output shaft of the reducer is driven to at least one conveying roller.

[0023] By adopting the above technical solution, a combination of a servo motor and a reducer is used. The reducer converts the high-speed, low-torque power of the servo motor into the low-speed, high-torque power required to drive the conveyor rollers. This setup provides a powerful and stable conveying force for the conveying components, which is sufficient to overcome the enormous friction and resistance generated during the cold bending of the steel profiles. This ensures that the steel profiles can be fed at a uniform speed and stably during the cold bending process, providing the power guarantee for continuous, high-quality cold bending.

[0024] As another aspect of this application, a method for operating the multi-axis automatic cold bending machine for producing steel arch frames as described above is provided, comprising the following steps: S1. Introduce the first end of the steel section into the conveying assembly, control the conveying assembly to convey the steel section to the cold bending station, and stop conveying when the top pressure roller can abut against the steel section. S2. Start the first telescopic drive component to make the top pressure roller roll into contact with the steel section, and control the output length of the first telescopic drive component according to the required bending arc to cold bend the steel section. S3. Continue to control the conveying assembly to continuously convey the steel profile to the cold bending station, and use the cutting equipment to cut the cold-bent steel profile into sections according to a predetermined length.

[0025] By adopting the above technical solution, while applying bending force to the steel profile at the cold bending station, the conveying assembly continuously feeds the steel profile to the cold bending station, and the cutting equipment cuts the cold-bent steel profile into sections according to a predetermined length. This method realizes a continuous operation process of "feeding, cold bending, and cutting simultaneously" of the steel profile, completely changing the piece-by-piece, intermittent processing method of "cutting first and then cold bending" in the background technology. This greatly improves production efficiency and ensures that the steel profile is effectively cold-bent from beginning to end, resulting in a complete arc-shaped steel arch frame and improving the product quality of the steel arch frame.

[0026] In summary, this application includes the following beneficial technical effects: 1. Improve the efficiency of cold bending of structural steel and the product quality of finished steel arches. Specifically, through the conveying and pressing components, the structural steel is continuously conveyed along its length while being subjected to a thrust applied by the pressing rollers in the pressing component, either inclined or perpendicular to the conveying direction, to achieve continuous cold bending. This allows the structural steel to continuously enter the cold bending station for processing, and after processing, it is cut into sections by the cutting equipment, realizing continuous operation. At the same time, by simply controlling the extension of the first telescopic drive component, multiple connected arcs can be formed on a single structural steel section, greatly improving production efficiency and making it suitable for automated production lines. Furthermore, because the structural steel is continuously subjected to bending force during the conveying process, the structural steel can be effectively cold-bent from beginning to end, resulting in a complete arc shape in the finished steel arch, avoiding the overall quality reduction and load-bearing capacity reduction caused by straight ends, and significantly improving product quality. 2. When the top pressure roller rolls against the protruding structures on the surface of the finished steel profile, the bending curvature of the profile changes. By designing multiple top pressure rollers to elastically roll against the steel profile surface and apply bending force, when a single top pressure roller rolls against the protruding structure, the elastic element will act as a buffer, allowing the top pressure roller to retract into the groove along with the slider connected to it, thus achieving "flexible avoidance" of the protruding structure. At the same time, the remaining top pressure rollers that do not contact the protruding structure bear the bending force applied to the steel profile. This "flexible avoidance" design greatly reduces the impact and influence of the protruding structure on the uniformity of the cold bending curvature of the steel profile, making the bending curvature of the steel profile smoother and with smaller deviations. Furthermore, the fact that multiple top pressure rollers jointly bear the reaction force generated by the bending of the steel profile can effectively reduce the springback after bending, further improving the accuracy of continuous cold bending of the steel profile and the product quality of the finished steel arch frame. 3. The limiting rollers, supporting rollers, and conveying rollers work together to provide comprehensive limiting of the steel profile in four directions: up, down, left, and right. This not only restricts the displacement of the steel profile within the bending plane but also further restricts its movement or torsion along the direction inclined to the bending plane. This ensures that the steel profile maintains a precise feeding posture even when subjected to the bending force applied by the top pressure assembly, further improving the stability and accuracy of the bending curvature during the cold bending process. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0028] Figure 2 This is a top view of Embodiment 1 of this application.

[0029] Figure 3 yes Figure 1 A magnified view of part A in the middle.

[0030] Figure 4 This is a top view of Embodiment 2 of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Working platform; 11. Cold bending station; 2. Conveying assembly; 21. Support roller; 22. Conveying roller; 23. Drive component; 231. Servo motor; 232. Reducer; 3. Top pressing assembly; 31. Top pressing roller; 32. First telescopic drive component; 33. First slide rail; 34. First slide block; 341. Slide groove; 35. Slider; 36. Elastic component; 4. Adjustment assembly; 41. Second slide rail; 42. Second slide block; 43. Second telescopic drive component; 5. Limiting assembly; 51. Limiting roller; 52. Mounting frame; 53. Third slide block; 54. Lead screw; 55. Handwheel; 6. Laser rangefinder. Detailed Implementation

[0032] The following combination Figures 1-4 This application will be described in further detail.

[0033] This application discloses an automatic cold bending machine for multi-axis steel profiles used in the production of steel arch frames and its working method.

[0034] Example 1

[0035] Reference Figure 1 and Figure 2 In this embodiment, the multi-axis automatic cold bending machine for steel arch frame production includes a working platform 1, a conveying assembly 2, a pressing assembly 3, an adjusting assembly 4, and a limiting assembly 5. The working platform 1 has a cold bending station 11. The conveying assembly 2 is located on the working platform 1 and is used to convey steel sections to the cold bending station 11 along the length of the steel section. The pressing assembly 3 is located at the cold bending station 11 and includes a pressing roller 31 and a first telescopic drive member 32. The pressing roller 31 rolls against the steel section output by the conveying assembly 2, and the first telescopic drive member 32 drives the pressing roller 31 to move in a direction inclined to or perpendicular to the conveying direction of the steel section.

[0036] In this way, while the steel profile is continuously conveyed along its length by the conveying assembly 2 to the cold bending station 11, it is subjected to a thrust applied by the top pressure roller 31 in the top pressure assembly 3, which is inclined or perpendicular to its conveying direction, to achieve continuous cold bending. This allows the steel profile to continuously enter the cold bending station 11 for processing, and then be cut into sections by the cutting equipment after processing, realizing continuous operation. At the same time, by simply controlling the extension of the first telescopic drive component 32, multiple connected arcs can be formed on a single steel profile, greatly improving production efficiency and making it suitable for automated production lines. Furthermore, since the steel profile is continuously subjected to bending force during the conveying process, it can be effectively cold-bent from beginning to end, resulting in a complete arc shape for the finished steel arch frame. This avoids the overall quality reduction and load-bearing capacity reduction caused by straight ends, significantly improving product quality.

[0037] Specifically, the work platform 1 is made of welded steel plates and resembles a table in appearance. The top surface of the work platform 1 is parallel to the horizontal plane and is used to install and support other components. The conveying direction of the steel profiles is parallel to the horizontal plane to ensure that the steel profiles are not affected by the acceleration due to gravity and to ensure the stability of the steel profiles during conveying.

[0038] The top pressing assembly 3 also includes a first slide rail 33 and a first slide block 34. The first slide rail 33 is fixed to the top surface of the working platform 1 by screws and extends in a direction parallel to the horizontal plane and inclined to the direction of steel conveying. The first slide rail 33 is usually a high-precision linear slide rail to ensure that it has good straightness.

[0039] The first slide block 34 is slidably connected to the first slide rail 33 and can slide in a direction parallel to the horizontal plane and perpendicular to the steel conveying direction. The first slide block 34 is U-shaped, and the top pressure roller 31 is rotatably connected to the first slide block 34. The first telescopic drive member 32 is a hydraulic cylinder used to drive the first slide block 34 to slide along the extension direction of the first slide rail 33. The output end of the first telescopic drive member 32 is hinged to the first slide block 34. In other embodiments, the first telescopic drive member 32 can also be a cylinder or other drive device commonly used in mechanical fields that can realize linear reciprocating motion.

[0040] In this way, by utilizing the precise sliding connection between the first slide block 34 and the first slide rail 33, the movement path of the top pressure roller 31 is strictly limited to a straight line that is inclined or perpendicular to the steel conveying direction. This avoids the possible offset or vibration of the first telescopic drive component 32 during telescopic movement, ensuring that the thrust applied by the top pressure roller 31 to the steel is constant in direction and stable in action, thereby improving the stability and consistency of the cold bending forming curvature of the steel.

[0041] Reference Figure 1 and Figure 2In this embodiment, the conveying assembly 2 includes multiple support rollers 21, multiple conveying rollers 22, and a driving component 23. In this embodiment, there are five support rollers 21, which are spaced apart on the working platform 1 along the extension path of the steel section. Each support roller 21 rotates relative to the working platform 1 and rolls against the bottom surface of the steel section to support it. The rotation axis of the support rollers 21 is parallel to the horizontal plane and perpendicular to the conveying direction of the steel section. The support rollers 21 are typically made of high-strength steel and are cylindrical in shape. The surface of the support rollers 21 is finely polished to reduce friction with the bottom surface of the steel section. In other embodiments, the number of support rollers 21 can be selected according to actual needs, with a minimum of two required. The support rollers 21 can also be made of nylon or rubber to reduce vibration generated during steel section conveying.

[0042] In this embodiment, the top pressure roller 31 rolls against the first outer side of the steel section; there are six conveying rollers 22, all of which are rotatably arranged relative to the working platform 1. Three of the six conveying rollers 22 are located on the first side of the steel section and roll against the first outer side of the steel section. The remaining three conveying rollers 22 are located on the second side of the steel section and roll against the second outer side of the steel section. The conveying rollers 22 are also cylindrical, generally made of metal, and their surfaces can be provided with anti-slip textures to increase friction with the steel section.

[0043] In other embodiments, the number of conveying rollers 22 can be selected according to actual needs, as long as at least one conveying roller 22 rolls against the first outer side of the steel section, at least one conveying roller 22 rolls against the second outer side of the steel section, and when multiple conveying rollers 22 and top pressure rollers 31 roll against the steel section, the portion of the steel section that is rolled against by the conveying rollers 22 can be restricted from displacement in the bending plane of the steel section along a direction inclined or perpendicular to the length direction of the steel section.

[0044] In this embodiment, two drive components 23 are provided to drive the conveyor rollers 22 to rotate. Each drive component 23 drives one conveyor roller 22 located on the second side of the profile steel. Each drive component 23 includes a servo motor 231 and a reducer 232. The reducer 232 is typically a gear reducer 232, which converts the high-speed, low-torque power of the servo motor 231 into the low-speed, high-torque power required to drive the conveyor rollers 22. The output shaft of the servo motor 231 is connected to the input shaft of the reducer 232 via a coupling, and the output shaft of the reducer 232 is connected to one conveyor roller 22 via a gear drive. In other embodiments, the number of drive components 23 can be selected according to actual needs, with at least one, and each drive at least one conveyor roller 22 to rotate.

[0045] In this way, multiple conveying rollers 22 cooperate with the top pressure roller 31 to achieve directional and stable conveying of the steel profile. Simultaneously, they collectively apply restraint to the steel profile, effectively preventing tilting or displacement perpendicular to the length direction of the steel profile within the bending plane when the top pressure roller 31 applies the thrust required for cold bending. This ensures the posture stability of the steel profile during cold bending, providing a foundation for achieving precise and high-quality bending curvature. Multiple support rollers 21 provide stable bottom support for the steel profile, enabling it to be supported during conveying. A drive combination of a servo motor 231 and a reducer 232 is used. The reducer 232 converts the high-speed, low-torque power of the servo motor 231 into the low-speed, high-torque power required to drive the conveying rollers 22. This design provides a powerful and stable conveying force for the conveying assembly 2, sufficient to overcome the enormous friction and resistance generated during cold bending of the steel profile, ensuring uniform and stable feeding of the steel profile during cold bending, and providing the power guarantee for continuous, high-quality cold bending.

[0046] It should be noted that the steel section used in this embodiment is an I-beam. The first outer side and the second outer side refer to the side of the upper flange of the I-beam that is away from the connection with the web, and the side of the lower flange of the I-beam that is away from the connection with the web, respectively. The bending plane of the I-beam is parallel to the web of the I-beam, that is, it is cold-bent in a direction parallel to the web of the I-beam.

[0047] Reference Figure 1 and Figure 2 In this embodiment, the multi-axis automatic cold bending machine for steel arch frame production also includes a control host (not shown in the accompanying drawings) and a laser rangefinder 6. The control host is specifically a computer with programming software and control software installed inside; the laser rangefinder 6 is installed on the work platform 1 and is used to calculate the change in the bending arc of the steel section by detecting the distance to the surface of the cold-bent steel section.

[0048] The control host is electrically connected to the laser rangefinder 6, the first telescopic drive component 32, and the servo motor 231. The program is written and executed in the control host using programming software, and the extension amount of the first telescopic drive component 32 and the number of rotations of the servo motor 231 are controlled by the control software. It can automatically calculate the length of the steel section conveyed by the conveying roller 22 and the cold bending arc of the steel section, thereby realizing the cold bending of the specified arc on the steel section of the specified length, so as to meet the production needs of various types of steel arch frames and greatly improve the applicability of the cold bending machine of this application.

[0049] Meanwhile, the laser rangefinder 6 detects the curvature change of the cold-bent steel section and feeds back the detected curvature change fluctuation value to the control host. The control host then corrects the extension amount of the first telescopic drive component 32 to ensure that the bending curvature dimension of the steel section remains stable.

[0050] In other embodiments, an electronic meter counter can be used instead of the servo motor 231 to calculate the conveying length of the steel profile. Specifically, the electronic meter counter is electrically connected to the control host, and the electronic meter counter directly measures the conveying length of the steel profile. Alternatively, a draw rope encoder can be electrically connected to the control host, and the draw rope encoder directly measures the extension length of the first telescopic drive member 32, thereby automatically calculating the cold bending curvature of the steel profile and using the laser rangefinder 6 to correct the cold bending curvature.

[0051] Reference Figure 1 and Figure 2 In this embodiment, the adjusting assembly 4 is used to adjust the distance between the conveying roller 22 that rolls against the first outer side of the steel profile and the conveying roller 22 that rolls against the second outer side of the steel profile. Three adjusting assemblies 4 are provided, each including a second slide rail 41, a second slide block 42, and a second telescopic drive member 43. The second slide rail 41 is fixed to the top surface of the work platform 1 by screws and extends in a direction parallel to the horizontal plane and perpendicular to the steel profile conveying direction. The second slide rail 41 is typically a high-precision linear slide rail to ensure good straightness.

[0052] The second slide block 42 is slidably connected to the second slide rail 41 and can slide in a direction parallel to the horizontal plane and perpendicular to the steel section conveying direction. The second slide block 42 is U-shaped. The conveying roller 22 that rolls against the first outer side of the steel section is rotatably connected to the second slide block 42. Each of the three second slide blocks 42 in the three adjusting components 4 is rotatably connected to a conveying roller 22 that rolls against the first outer side of the steel section. The conveying roller 22 that rolls against the second outer side of the steel section is rotatably connected to the working platform 1.

[0053] The second telescopic drive member 43 is a hydraulic cylinder. The second slide block 42 is hinged to the output end of the second telescopic drive member 43. The second telescopic drive member 43 is used to drive the second slide block 42 to slide along the extension direction of the second slide rail 41. In other embodiments, the adjusting component 4 can also use only one, specifically, all the conveying rollers 22 of the first outer side of the rolling abutment steel section can be rotatably connected to a second slide block 42. The second telescopic drive member 43 can also be a cylinder or other drive devices commonly used in mechanical fields that can realize linear reciprocating motion.

[0054] In this way, the distance between the conveying rollers 22 on the first and second outer sides of the abutting steel section can be adjusted, so that the conveying assembly 2 can easily adapt to the conveying of steel sections of different widths without the need for cumbersome mechanical adjustments when the steel section specifications change. This greatly enhances the versatility and applicability of the equipment and reduces the time cost of production line changeover.

[0055] Reference Figure 2 and Figure 3In this embodiment, five limiting components 5 are provided, and the five limiting components 5 are spaced apart along the extension path of the profile steel. The limiting component 5 includes a limiting roller 51, a mounting frame 52, a third slide 53, and a lead screw 54. The limiting roller 51 is rotatably positioned relative to the working platform 1 and rolls against the top surface of the profile steel. The rotation axis of the limiting roller 51 is parallel to the rotation axis of the supporting roller 21. The limiting roller 51 is typically made of high-strength steel, is cylindrical in shape, and its surface is finely polished to reduce friction with the top surface of the profile steel.

[0056] Mounting bracket 52 is fixedly connected to the working platform 1 by screws. Support rollers 21 are rotatably connected to mounting bracket 52 via bearings, with each of the five support rollers 21 corresponding to one of the five mounting brackets 52. Limiting rollers 51 are rotatably connected to the third slide block 53 via bearings. The third slide block 53 is slidably connected to the mounting bracket 52, and its sliding direction is perpendicular to the horizontal plane and the conveying direction of the steel section. Lead screw 54 is threadedly connected to the mounting bracket 52, and one end of the lead screw 54 is fixedly connected to the third slide block 53. The rotation axis of the lead screw 54 is parallel to the sliding direction of the third slide block 53. A handwheel 55 is coaxially fixedly connected to the end of the lead screw 54 away from the end connected to the third slide block 53. In other embodiments, the sliding direction of the third slide block 53 can also be inclined to the conveying direction of the steel section.

[0057] In this way, the limiting roller 51, together with the supporting roller 21 and the conveying roller 22, forms a comprehensive limiting system for the steel profile in four directions: up, down, left, and right. This not only restricts the displacement of the steel profile within the bending plane but also further restricts its movement or torsion along the direction inclined to the bending plane, ensuring that the steel profile maintains a precise feeding posture even when subjected to the bending force applied by the top pressure assembly 3. This further improves the stability and accuracy of the bending arc during the cold bending process of the steel profile. Furthermore, when processing steel profiles of different heights, the vertical distance between the limiting roller 51 and the supporting roller 21 can be easily adjusted by rotating the handwheel 55 to drive the lead screw 54, ensuring close contact with the top surface of the steel profile. This, in conjunction with the adjusting assembly 4, achieves strong adaptability and stable limiting for steel profiles of different specifications, further enhancing the versatility of the equipment.

[0058] The implementation principle of Example 1 is as follows: While the steel section is continuously conveyed along its length by the conveying assembly 2 to the cold bending station 11, it is subjected to a thrust applied by the top pressure roller 31 in the top pressure assembly 3, which is inclined or perpendicular to its conveying direction, to achieve continuous cold bending. This allows the steel section to continuously enter the cold bending station 11 for processing, and after processing, it is cut into sections by the cutting equipment, realizing continuous operation. Simultaneously, by simply controlling the extension amount of the first telescopic drive component 32, multiple connected arcs can be formed on a single steel section, greatly improving production efficiency and making it suitable for automated production lines. Furthermore, because the steel section is continuously subjected to bending force during conveying, it can be effectively cold-bent from beginning to end, resulting in a complete arc shape in the finished steel arch frame. This avoids the overall quality reduction and load-bearing capacity decrease caused by straight ends, significantly improving product quality.

[0059] Example 2

[0060] Reference Figure 4 The difference between Embodiment 2 and Embodiment 1 is that the top-pressing assembly 3 further includes four sliders 35 and four elastic elements 36. The first slide block 34 has multiple grooves 341, with each of the four sliders 35 corresponding to one of the four grooves 341. The shape of the slider 35 matches the shape of the groove 341, and the slider 35 is slidably disposed within the groove 341. The sliding direction of the slider 35 is parallel to the horizontal plane and inclined to the conveying direction of the steel section. The elastic elements 36 are springs, with each of the four elastic elements 36 corresponding to one of the four sliders 35. The elastic elements 36 are disposed within the groove 341 to cause the sliders 35 to tend to move outward from the groove 341. One end of the elastic element 36 is fixedly connected to the bottom surface of the groove 341, and the other end of the elastic element 36 is fixedly connected to the slider 35.

[0061] Four top pressure rollers 31 are also provided, and the four top pressure rollers 31 are rotatably connected to the four sliders 35 one by one, with the top pressure rollers 31 located at the end of the slider 35 away from the slide groove 341. The reaction force generated by the bending of the steel section can be jointly borne by the four top pressure rollers 31.

[0062] In other embodiments, the sliding direction of the slider 35 can also be perpendicular to the conveying direction of the steel section; the number of slider 35, elastic element 36, chute 341 and top pressure roller 31 can also be selected according to actual needs, but at least two of them are required.

[0063] The implementation principle of Example 2 is as follows: When the top pressure roller 31 rolls against the protruding structure on the surface of the finished steel profile, the bending curvature of the steel profile changes. By designing multiple top pressure rollers 31 to elastically roll against the surface of the steel profile and apply bending force, when a single top pressure roller 31 rolls against the protruding structure, the elastic element 36 will play a buffering role, allowing the top pressure roller 31 to retract into the groove 341 along with the slider 35 connected to it, thereby achieving "flexible avoidance" of the protruding structure. At the same time, the remaining top pressure rollers 31 that do not contact the protruding structure bear the role of applying bending force to the steel profile. This "flexible avoidance" design greatly reduces the impact and influence of the protruding structure on the surface of the steel profile on the uniformity of the cold bending curvature of the steel profile, making the bending curvature of the steel profile smoother and with smaller deviations. Furthermore, the multiple top pressure rollers 31 jointly bear the reaction force generated by the bending of the steel profile, which can effectively reduce the springback of the steel profile after bending, further improving the accuracy of continuous cold bending processing of the steel profile and the product quality of the finished steel arch frame.

[0064] Example 3

[0065] Embodiment 3 of this application also discloses a working method of a multi-axis automatic cold bending machine for steel arch frame production as described above, including the following steps: S1. Introduce the first end of the steel section into the conveying assembly 2, and control the conveying assembly 2 to convey the steel section to the cold bending station 11. Stop conveying when the top pressure roller 31 can contact the steel section.

[0066] S2. Activate the first telescopic drive component 32 to make the top pressure roller 31 roll and abut against the steel section, and control the output length of the first telescopic drive component 32 according to the required bending arc to cold bend the steel section.

[0067] S3. Continue to control the conveying assembly 2 to continuously convey the steel profile to the cold bending station 11, and use the cutting equipment to cut the cold-bent steel profile into sections according to a predetermined length.

[0068] The implementation principle of Example 3 is as follows: while applying bending force to the steel section at the cold bending station 11, the conveying assembly 2 continuously feeds the steel section to the cold bending station 11, and the cutting equipment is used to cut the cold-bent steel section into segments according to a predetermined length. This method realizes a continuous operation process of "feeding, cold bending, and cutting simultaneously" of the steel section, completely changing the piece-by-piece, intermittent processing method of "cutting first and then cold bending" in the background technology, greatly improving production efficiency, and ensuring that the steel section is effectively cold-bent from beginning to end, obtaining a complete arc-shaped steel arch frame, and improving the product quality of the steel arch frame.

[0069] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-axis automatic cold bending machine for steel arch frame production, characterized in that, include: The work platform (1) is provided with a cold bending station (11). A conveying assembly (2) is provided on the working platform (1) for conveying steel sections to the cold bending station (11) along the length of the steel section; The top pressing assembly (3) is located at the cold bending station (11). The top pressing assembly (3) includes a top pressing roller (31) and a first telescopic drive member (32). The top pressing roller (31) is used to roll against the steel section output by the conveying assembly (2). The first telescopic drive member (32) is used to drive the top pressing roller (31) to move in a direction that is inclined or perpendicular to the conveying direction of the steel section.

2. The multi-axis automatic cold bending machine for steel arch frame production according to claim 1, characterized in that: The top pressing assembly (3) further includes a first slide rail (33) and a first slide block (34); the first slide rail (33) is fixedly connected to the working platform (1), the first slide block (34) is slidably connected to the first slide rail (33), and the sliding direction of the first slide block (34) is inclined or perpendicular to the conveying direction of the steel section; the first slide block (34) is connected to the output end of the first telescopic drive (32), and the top pressing roller (31) is disposed on the first slide block (34).

3. The multi-axis automatic cold bending machine for steel arch frame production according to claim 2, characterized in that: The top-pressing assembly (3) also includes multiple sliders (35) and multiple elastic elements (36); the first slide block (34) is provided with multiple grooves (341), and the multiple sliders (35) correspond one-to-one with the multiple grooves (341). The sliders (35) are slidably disposed in the grooves (341), and the sliding direction of the sliders (35) is inclined or perpendicular to the conveying direction of the profile. Multiple top-pressing rollers (31) are provided, and the multiple top-pressing rollers (31) are rotatably connected to the multiple sliders (35) in a one-to-one correspondence, for abutting against the same side of the profile along the extension direction of the profile respectively; the multiple elastic elements (36) correspond one-to-one with the multiple sliders (35), and the elastic elements (36) are used to make the sliders (35) tend to move outward from the grooves (341); the reaction force generated by the bending of the profile can be jointly borne by the multiple top-pressing rollers (31).

4. The multi-axis automatic cold bending machine for steel arch frame production according to claim 1, characterized in that: The conveying assembly (2) includes multiple support rollers (21), multiple conveying rollers (22), and a driving component (23); the multiple support rollers (21) are rotatably arranged relative to the working platform (1) and are used to roll against the bottom surface of the steel section to support the steel section, and the rotation axis of the support rollers (21) is parallel to the horizontal plane and perpendicular to the conveying direction of the steel section; the top pressure roller (31) rolls against the first outer side surface of the steel section; among the multiple conveying rollers (22), at least one conveying roller (22) rolls against the first outer side surface of the steel section, and at least one conveying roller (22) rolls against the second outer side surface of the steel section; when the multiple conveying rollers (22) and the top pressure roller (31) roll against the steel section, the portion of the steel section that is rolled against by the conveying rollers (22) can be restricted to displacement in the bending plane of the steel section along an inclined or perpendicular direction to the length direction of the steel section; the driving component (23) is used to drive at least one of the conveying rollers (22) to rotate.

5. The multi-axis automatic cold bending machine for steel arch frame production according to claim 4, characterized in that: It also includes an adjustment component (4), which includes a second slide rail (41), a second slide block (42), and a second telescopic drive component (43); the second slide rail (41) is fixedly connected to the working platform (1), the second slide block (42) is slidably connected to the second slide rail (41), and the sliding direction of the second slide block (42) is inclined or perpendicular to the conveying direction of the steel section; among the plurality of conveying rollers (22), the conveying roller (22) that rolls against the first outer side and / or the second outer side of the steel section is rotatably connected to the second slide block (42), and the second telescopic drive component (43) is used to drive the second slide block (42) to slide along the extension direction of the second slide rail (41).

6. The multi-axis automatic cold bending machine for steel arch frame production according to claim 4, characterized in that: It also includes a limiting component (5), which includes a limiting roller (51); the limiting roller (51) is rotatably set relative to the working platform (1) and is used to roll against the top surface of the steel section, and the rotation axis of the limiting roller (51) is parallel to the rotation axis of the supporting roller (21).

7. The multi-axis automatic cold bending machine for steel arch frame production according to claim 6, characterized in that: The limiting component (5) further includes a mounting frame (52), a third slide (53), and a lead screw (54); the mounting frame (52) is fixedly connected to the working platform (1), the third slide (53) is slidably connected to the mounting frame (52), and the sliding direction of the third slide (53) is inclined or perpendicular to the conveying direction of the steel section; the limiting roller (51) is rotatably connected to the third slide (53), the lead screw (54) is threadedly connected to the mounting frame (52), and the lead screw (54) is fixedly connected to the third slide (53), and the rotation axis of the lead screw (54) is parallel to the sliding direction of the third slide (53).

8. The multi-axis automatic cold bending machine for steel arch frame production according to claim 7, characterized in that: A handwheel (55) is coaxially fixedly connected to the lead screw (54).

9. The multi-axis automatic cold bending machine for steel arch frame production according to claim 4, characterized in that: The drive component (23) includes a servo motor (231) and a reducer (232). The output shaft of the servo motor (231) is driven to the input shaft of the reducer (232), and the output shaft of the reducer (232) is driven to at least one conveying roller (22).

10. A method for operating a multi-axis automatic cold bending machine for producing steel arch frames as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Introduce the first end of the steel section into the conveying assembly (2), control the conveying assembly (2) to convey the steel section to the cold bending station (11), and stop conveying when the top pressure roller (31) can contact the steel section. S2. Start the first telescopic drive (32) to make the top pressure roller (31) roll against the steel section, and control the output length of the first telescopic drive (32) according to the required bending arc to cold bend the steel section. S3. Continue to control the conveying assembly (2) to continuously convey the steel profile to the cold bending station (11), and use the cutting equipment to cut the cold-bent steel profile into sections according to the predetermined length.

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