Intelligent welding device for steel structure machining combination

Abstract

The application discloses an intelligent welding device for steel structure processing and combination, which comprises a workbench, four groups of linear motion mechanisms arranged on the upper surface of the workbench, the output end of each group of linear motion mechanisms being capable of moving linearly towards or away from the center of the upper surface of the workbench, a mounting frame fixedly connected to the output end of each group of linear motion mechanisms, a section steel holding mechanism arranged on the mounting frame and used for fixing and holding a single section steel in a predetermined orientation, a synchronous driving mechanism in transmission connection with the four groups of linear motion mechanisms and used for driving the four output ends to move synchronously, so that the four section steels move synchronously towards the center and are combined in the central region to form a closed section steel frame, and a welding mechanism used for welding the butt joint parts of the adjacent section steels of the combined section steel frame. The device realizes automatic centering and combination, improves the combination positioning precision and size consistency of the section steel frame, and completes the welding operation, thereby effectively improving the processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically, to an intelligent welding device for steel structure processing and assembly. Background Technology

[0002] In steel structure welding operations, it is often necessary to connect multiple steel sections end-to-end to form a closed frame structure, such as assembling four steel sections into a square frame and welding them at the joints. In existing technology, the steel sections are typically placed manually on a workbench, and the operator manually adjusts their position and orientation for alignment and fixation based on visual inspection and experience before welding is performed point-by-point. This method has significant drawbacks: The positioning and fixing of structural steel sections relies heavily on the operator's skill level, making it difficult to guarantee the positional accuracy and consistency of multiple steel sections during assembly. This results in significant deviations in frame dimensions and inconsistent welding quality. Furthermore, manual operation is inefficient, failing to meet the demands of mass production, and is labor-intensive. Therefore, a device is needed that can automatically center, synchronously assemble, and weld structural steel sections to improve processing accuracy and efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the issues of poor positioning accuracy and low efficiency caused by manual operation in the welding of multiple steel sections in the prior art. The invention provides a steel structure processing and welding device and welding method that can realize the synchronous centering of four steel sections, automatic assembly and welding.

[0004] This invention provides a steel structure processing and welding assembly device, comprising a worktable; four sets of linear motion mechanisms arrayed on the upper surface of the worktable, each set of linear motion mechanisms having an output end capable of linearly moving toward or away from the center of the upper surface of the worktable; a mounting frame fixedly connected to the output end of each set of linear motion mechanisms; a steel section holding mechanism mounted on the mounting frame for fixing and holding a single steel section in a predetermined position; a synchronous drive mechanism, transmissionally connected to the four sets of linear motion mechanisms, for driving the four output ends to move synchronously, so that the four steel sections move synchronously toward the center and assemble in the central region to form a closed steel section frame; and a welding mechanism for welding the butt joints of adjacent steel sections in the assembled steel section frame.

[0005] Furthermore, the linear motion mechanism includes a horizontal frame fixed to the upper surface of the worktable; a guide rail extending in the direction of movement and disposed on the horizontal frame; a lead screw rotatably supported on the horizontal frame and extending in the direction of movement; and a slider that slides with the guide rail and is threadedly connected to the lead screw, the slider constituting the output end of the linear motion mechanism, and a mounting bracket fixed on the slider.

[0006] In one implementation, the synchronous drive mechanism includes a drive motor; a main gear, which is driven and connected to the output shaft of the drive motor; and four bevel gears, which are coaxially fixed to the inner ends of the lead screws of four linear motion mechanisms, and all mesh with the main gear.

[0007] Furthermore, the steel section holding mechanism includes a centering mechanism, which comprises a U-shaped frame fixed on a mounting frame and having a channel with a central opening; multiple ball bearings rotatably disposed on a side wall of the U-shaped frame cavity near the center of the worktable and on the bottom wall of the cavity; a conveyor belt disposed on the side of the U-shaped frame away from the center of the worktable, with its conveying surface opposite to the side wall with the ball bearings; and a first telescopic cylinder, the cylinder body of which is fixed on the U-shaped frame, with its telescopic end connected to the conveyor belt to adjust the distance between the conveying surface and the opposite side wall, thereby forming a conveying channel with adjustable width for accommodating and conveying a single steel section.

[0008] Furthermore, it also includes a first pressure sensor, which is disposed between the conveyor belt and the telescopic end of the first telescopic cylinder; and a measuring sensor, which is mounted on the U-shaped frame and electrically connected to the motor of the conveyor belt, for detecting the moving position of a single steel section.

[0009] In one embodiment, the steel section holding mechanism also includes a fixing mechanism, which includes a second telescopic cylinder, vertically mounted on the mounting frame; an electromagnetic plate connected to the telescopic end of the second telescopic cylinder, used to adsorb and fix a single steel section; a second pressure sensor located between the telescopic end of the second telescopic cylinder and the electromagnetic plate; and a through hole connecting the top of the mounting frame and the bottom of the U-shaped frame, through which the telescopic end of the second telescopic cylinder can pass to raise the electromagnetic plate to the adsorption position.

[0010] In one implementation, a fixed frame is fixed at the center of the upper surface of the workbench, and a synchronous drive mechanism is mounted on the fixed frame; a rotating mechanism is also mounted on the fixed frame, and a positioning mechanism is connected to the rotation output end of the rotating mechanism; the welding torch of the welding mechanism is mounted on the execution end of the positioning mechanism.

[0011] In one embodiment, the rotating mechanism includes a rotating roller, which is vertically and rotatably mounted on a fixed frame via bearings; a rotating motor, which is mounted on the fixed frame and driven by the rotating roller; a rotating table, which is coaxially fixed to the top of the rotating roller; and a positioning mechanism, which is mounted on the rotating table.

[0012] Furthermore, the positioning mechanism includes a horizontal fixed plate fixed to the rotating output end; a horizontal moving plate slidably fitted onto the horizontal fixed plate in the horizontal direction; a fixed platform fixed to the end of the horizontal moving plate; a third telescopic cylinder, the cylinder body of which is fixed to the horizontal fixed plate and the telescopic end of which is connected to the fixed platform; a vertical fixed plate fixed to the fixed platform; a vertical moving plate slidably fitted onto the vertical fixed plate in the vertical direction; a mounting platform fixed to the end of the vertical moving plate, on which the welding torch is mounted; and a fourth telescopic cylinder, the cylinder body of which is fixed to the vertical fixed plate and the telescopic end of which is connected to the mounting platform.

[0013] As one implementation method, another set of positioning mechanisms is also provided on the rotating platform. The angle between the opposing center lines of the two sets of positioning mechanisms is 90°, and an angle grinder is installed on the mounting platform of the other set of positioning mechanisms to grind the weld that has been welded.

[0014] Furthermore, the upper surface of the worktable is square, and four sets of linear motion mechanisms are arranged along the four sides of the square.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention, by setting up four sets of linear motion mechanisms and synchronous drive mechanisms, enables four steel sections to move synchronously in the radial direction on the worktable and to accurately approach and assemble, solving the problem of poor positional accuracy when manually adjusting the position and ensuring the dimensional consistency of the frame. The centering mechanism in the steel section holding mechanism forms an adjustable conveying channel through ball bearings and an adjustable conveyor belt. Combined with pressure sensors and measurement sensors, it can automatically perform posture centering and positioning detection on the steel section, ensuring that each steel section is calibrated before being transported to its position, thus avoiding deviations during subsequent assembly. The fixing mechanism uses a second telescopic cylinder and an electromagnetic plate, which quickly adsorbs and fixes the steel after the steel profile is aligned, preventing the steel profile from shifting during the assembly process; The welding mechanism achieves precise switching of the welding torch between multiple joints through a rotating mechanism and a positioning mechanism, and can automatically complete the welding of all joint parts in sequence. The angle grinder on another set of positioning mechanisms can grind the weld immediately after welding, realizing integrated welding and grinding operations, which significantly improves processing efficiency and weld quality; The device automates the entire process from steel loading, alignment, assembly, fixing to welding, reducing manual intervention and improving production efficiency and product qualification rate. Attached Figure Description

[0016] Figure 1 A schematic diagram of the steel structure processing and welding apparatus provided in the embodiments of this application; Figure 2 for Figure 1A schematic diagram of a partially enlarged structure of embodiment A shown; Figure 3 for Figure 1 A schematic diagram of a partially enlarged structure of embodiment B shown; Figure 4 for Figure 1 The diagram shows a schematic representation of the fixing mechanism in the embodiment shown. Figure 5 for Figure 1 A schematic diagram of a partially enlarged structure of C in the illustrated embodiment; Figure 6 for Figure 1 The diagram shown illustrates the installation of the angle grinder in the embodiment. The components are as follows: 10. Workbench; 20. Linear motion mechanism; 21. Horizontal frame; 22. Guide rail; 23. Lead screw; 24. Slider; 30. Mounting bracket; 40. Steel retaining mechanism; 41. Centering mechanism; 411. U-shaped frame; 412. Ball bearing; 413. Conveyor belt; 414. First telescopic cylinder; 42. Fixing mechanism; 421. Second telescopic cylinder; 422. Electromagnetic plate; 50. Synchronous drive mechanism; 51. Drive motor; 52. Main gear; 53. Bevel gear; 60. Welding mechanism; 61. Welding torch; 70. 80. Steel frame; 90. Fixing frame; 91. Rotating mechanism; 92. Rotating roller; 93. Rotating motor; 100. Rotating table; 101. Positioning mechanism; 102. Horizontal fixing plate; 103. Horizontal moving plate; 104. Fixing table; 105. Third telescopic cylinder; 106. Vertical fixing plate; 107. Vertical moving plate; 108. Mounting table; 109. Fourth telescopic cylinder; 110. First pressure sensor; 120. Measuring sensor; 130. Through hole; 140. Second pressure sensor; 150. Angle grinder. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0018] The device provided in this application is mainly used in a steel structure processing workshop to automatically assemble multiple steel sections into a closed frame structure and complete the welding operation. Before describing the specific structure, some core terms appearing in the subsequent claims will be explained. The term "steel section" as used herein refers to long strip steel with a certain cross-sectional shape and length, such as I-beams, channel steel, angle steel, or rectangular steel pipes. This application does not limit the specific cross-sectional shape; any strip metal component that needs to be assembled end-to-end to form a frame is applicable. "Closed steel section frame" refers to four steel sections that abut end-to-end, forming a geometric shape with an open center and closed perimeter; the most typical example is a square frame. "Centering" specifically refers to calibrating the posture and spatial position of the steel sections so that their cross-sectional centerline or required feature line is aligned with the center of a preset conveying path.

[0019] like Figure 1 As shown in the figure, this application provides a steel structure processing and welding device, which includes a worktable 10, four sets of linear motion mechanisms 20, a mounting frame 30, a steel section holding mechanism 40, a synchronous drive mechanism 50, and a welding mechanism 60.

[0020] The workbench 10 serves as the foundational support for the entire machine. Four linear motion mechanisms 20 are arrayed on the upper surface of the workbench 10, with the output end of each mechanism capable of linear movement toward or away from the center of the upper surface of the workbench 10. A mounting bracket 30 is fixedly connected to the output end of each linear motion mechanism 20. A steel section holding mechanism 40 is mounted on the mounting bracket 30 to fix and hold a single steel section in a predetermined position. A synchronous drive mechanism 50 is connected to the four linear motion mechanisms 20 to drive the four output ends to move synchronously, causing the four steel sections to move synchronously toward the center and assemble in the central area to form a closed steel section frame 70. A welding mechanism 60 is used to weld the butt joints of adjacent steel sections of the assembled steel section frame 70.

[0021] According to the present invention, the device solves the problems of poor accuracy and low efficiency in steel section assembly through a collaborative working logic of "push-center-fix-weld". Specifically, the worktable 10 serves as a reference plane, and the output ends of its four sets of linear motion mechanisms 20 reciprocate in a radial direction toward the center. When the synchronous drive mechanism 50 is activated, it transmits power to the four sets of linear motion mechanisms 20 at the same speed and in the same direction. The output ends of the four sets of linear motion mechanisms 20 drive the steel section holding mechanism 40 on their respective mounting brackets 30 and the steel section fixed thereon to converge synchronously toward the center from four directions. This synchronous propulsion mechanism ensures that the ends of the four steel sections can arrive at the welding station simultaneously and connect with each other, avoiding the cumulative gap error caused by arriving in sequence, and ensuring the diagonal error and dimensional tolerance of the steel section frame 70. The steel section holding mechanism 40 firmly adsorbs and holds the steel section in a preset position beforehand, ensuring that it will not deflect or shift when subjected to the assembly contact force. After the front ends of the four steel sections contact and form a closed frame, the welding mechanism 60 welds the butt joint.

[0022] In one embodiment, the specific structure of the aforementioned linear motion mechanism 20 can be found in [reference needed]. Figure 1 The linear motion mechanism 20 includes a horizontal frame 21, a guide rail 22, a lead screw 23, and a slider 24. The horizontal frame 21 is fixed to the upper surface of the worktable 10, forming the supporting foundation for the entire linear motion mechanism 20. The guide rail 22, extending in the direction of movement, is mounted on the horizontal frame 21. The lead screw 23 is rotatably supported on the horizontal frame 21 and extends in the direction of movement. The slider 24 is slidably engaged with the guide rail 22 and threadedly connected to the lead screw 23. The slider 24 constitutes the output end of the linear motion mechanism 20, and the mounting bracket 30 is fixed to the slider 24. When the lead screw 23 is driven to rotate, the helical pair converts the rotational motion into precise linear motion of the slider 24, along with the mounting bracket 30 and the steel retaining mechanism 40, along the guide rail 22. By using the cooperation of lead screw 23 and guide rail 22 and utilizing the self-locking characteristic of screw drive, when synchronous drive mechanism 50 stops moving, even if a pushing force is generated during the assembly of steel profiles, slider 24 will not retract, thus firmly locking the final assembly state of steel profile frame 70 and ensuring structural stability during subsequent welding.

[0023] Based on the previous embodiment, in order to achieve strictly synchronized operation of the four sets of lead screws 23 in a compact and reliable manner, the following can be adopted: Figure 2The transmission scheme is shown. In one embodiment of this application, the synchronous drive mechanism 50 includes a drive motor 51, a main gear 52, and four bevel gears 53. The main gear 52 is driven and connected to the output shaft of the drive motor 51. The four bevel gears 53 are coaxially fixed to the inner ends of the lead screws 23 of the four linear motion mechanisms 20, and all mesh with the main gear 52. The specific operating logic is as follows: the drive motor 51 outputs torque to the main gear 52, and the main gear 52, as an active component, simultaneously meshes with the four bevel gears 53 arranged in a circular array. Since the number of teeth and the module of the four bevel gears 53 are exactly the same, and they all mesh with the same main gear 52, when the main gear 52 rotates, the four bevel gears 53 obtain completely consistent speed and direction of rotation, thereby driving the four lead screws 23 to rotate synchronously. This structure realizes the linkage of four outputs using a single drive source and a single-stage gear transmission, and mechanically ensures the synchronicity of the displacement of each output end, eliminating the response delay and error that may exist in electronic independent control.

[0024] In one embodiment, the steel profile needs to undergo precise orientation calibration before welding. The steel profile holding mechanism 40 includes an alignment mechanism 41. Specifically, as... Figure 3 As shown, the centering mechanism 41 includes a U-shaped frame 411 and multiple balls 412. The U-shaped frame 411 is fixed to the mounting frame 30 and has a centrally opened channel, which serves as the loading and conveying path for the steel profile. The multiple balls 412 are rotatably disposed on one side wall of the inner cavity of the U-shaped frame 411 near the center of the worktable 10 and on the bottom wall of the inner cavity. When the steel profile is pushed or fed into the channel, one side and the bottom surface of the profile will respectively form point contact rolling friction with the balls 412 on the side wall and the bottom wall of the U-shaped frame 411, allowing it to slide along the smooth reference surface formed by the balls 412 during conveying and automatically adjust its posture, greatly reducing straightening resistance, preventing scratches on the surface of the steel profile, and providing a stable centering reference.

[0025] Furthermore, in order to achieve automatic centering and provide transmission power for steel sections of different widths, in one embodiment, such as Figure 3As shown, the centering mechanism 41 also includes a conveyor belt 413 and a first telescopic cylinder 414. The conveyor belt 413 is located on the side of the U-shaped frame 411 away from the center of the worktable 10, and its conveying surface is opposite to the side wall with the balls 412. The cylinder body of the first telescopic cylinder 414 is fixed to the U-shaped frame 411, and its telescopic end is connected to the conveyor belt 413 to adjust the distance between the conveying surface and the opposite side wall, thereby forming a conveying channel with adjustable width for accommodating and conveying single steel sections. The working process is as follows: the first telescopic cylinder 414 drives the conveyor belt 413 to approach or move away from the side wall of the balls 412 according to the specifications of the steel section being processed, until the width of the conveying channel is slightly larger than the width of the steel section. After the steel section enters the channel, the conveying surface of the conveyor belt 413 contacts and squeezes the side of the steel section, pushing it and making its other side press against the balls 412, thus forcibly completing the centering during the conveying process.

[0026] As a more specific implementation, in order to accurately sense the state of the steel section during the centering and transmission process, in one embodiment, such as Figure 3 As shown, the device also includes a first pressure sensor 110 and a measuring sensor 120. The first pressure sensor 110 is disposed between the telescopic end of the conveyor belt 413 and the first telescopic cylinder 414. The measuring sensor 120 is mounted on the U-shaped frame 411 and electrically connected to the motor of the conveyor belt 413 to detect the moving position of a single steel section. The first pressure sensor 110 is used to monitor the pressure value applied by the conveyor belt 413 to the steel section in real time. When the steel section is successfully pushed to one side of the ball bearing 412 and a stable reaction force is generated, the pressure feedback signal can confirm that the steel section is in the centering clamping state. The measuring sensor 120 is used to detect the position of the steel section in the conveying direction, such as whether the end of the steel section has reached the preset centering position, determine whether it has reached the preset centering position, and then feed back the detected position signal to the controller. The controller controls the start and stop of the conveyor belt 413 according to the position signal. When the steel section moves to the preset centering position, the conveyor belt 413 stops, completing the precise centering of the steel section in the length direction.

[0027] In one embodiment, the steel section must be securely locked after being centered and delivered into place. The steel section holding mechanism 40 also includes a fixing mechanism 42. Figure 4As shown, the fixing mechanism 42 includes a second telescopic cylinder 421 and an electromagnetic plate 422. The second telescopic cylinder 421 is vertically mounted on the mounting frame 30. The electromagnetic plate 422 is connected to the telescopic end of the second telescopic cylinder 421 and is used to adsorb and fix a single steel section. When the steel section is in place, the second telescopic cylinder 421 extends, pushing the electromagnetic plate 422 upward until it is tightly attached to the bottom surface of the steel section. Then, the electromagnetic plate 422 is energized to generate a strong magnetic attraction force, firmly fixing the ferromagnetic steel section. This method of "mechanical lifting and attachment first, followed by electromagnetic adsorption and fixation" ensures that there is no gap between the electromagnetic plate 422 and the bottom surface of the steel section, maximizing the attraction force. This resists the huge lateral thrust and inertial impact during subsequent synchronous assembly, reliably preventing the steel section from shifting.

[0028] Furthermore, in one embodiment, to achieve a compact structure and protect the second telescopic cylinder 421, a through hole 130 is provided at the top of the mounting bracket 30 and the bottom of the U-shaped bracket 411. The telescopic end of the second telescopic cylinder 421 can pass through the through hole 130 to raise the electromagnetic plate 422 to the adsorption position. In addition, to prevent damage to the steel profile from excessive adsorption force or excessive lifting, the fixing mechanism 42 also includes a second pressure sensor 140, which is located between the telescopic end of the second telescopic cylinder 421 and the electromagnetic plate 422. When the second telescopic cylinder 421 is pushed up, the second pressure sensor 140 detects the contact pressure between the electromagnetic plate 422 and the steel profile. When the pressure reaches a preset safety threshold, the lifting stops and energization is triggered, realizing closed-loop force-controlled adsorption fixing and protecting the surface of the steel profile and the electromagnetic plate 422.

[0029] In one embodiment, to rationally integrate the two major functional modules of synchronous drive and welding into the central area, such as... Figure 1 As shown, a fixed frame 80 is fixed at the center of the upper surface of the worktable 10, and the synchronous drive mechanism 50 is mounted on the fixed frame 80. A rotating mechanism 90 is also mounted on the fixed frame 80, and the rotating output end of the rotating mechanism 90 is connected to a positioning mechanism 100. The welding torch 61 of the welding mechanism 60 is mounted on the execution end of the positioning mechanism 100. The fixed frame 80 provides a stable base for the synchronous drive mechanism 50 and the rotating mechanism 90 above the surface of the worktable 10, so that the synchronous drive mechanism 50 (main gear 52 and bevel gear 53) is located below the steel section splicing surface, while the rotating mechanism 90 is suspended in the upper operating area. The structure is clearly layered, avoiding motion interference.

[0030] In one embodiment, such as Figure 1As shown, the rotating mechanism 90 includes a rotating roller 91, a rotating motor 92, and a rotating table 93. The rotating roller 91 is vertically and rotatably mounted on the fixed frame 80 via bearings. The rotating motor 92 is mounted on the fixed frame 80 and driven by the rotating roller 91. The rotating table 93 is coaxially fixed to the top of the rotating roller 91, and the positioning mechanism 100 is mounted on the rotating table 93. During operation, the rotating motor 92 drives the rotating table 93 to rotate in the horizontal plane via the rotating roller 91, thereby driving the entire positioning mechanism 100 and the welding torch 61 to rotate around the center, enabling it to accurately switch to the position directly above any steel section butt joint, realizing multi-station operation with a single welding torch.

[0031] In one embodiment, to achieve high-precision positional fine-tuning of the welding torch 61 near a certain mating point, such as... Figure 5 As shown, the positioning mechanism 100 includes a horizontal fixed plate 101, a horizontal moving plate 102, a fixed platform 103, a third telescopic cylinder 104, a vertical fixed plate 105, a vertical moving plate 106, a mounting platform 107, and a fourth telescopic cylinder 108. The horizontal fixed plate 101 is fixed to the rotating output end (i.e., the rotating platform 93). The horizontal moving plate 102 is slidably fitted onto the horizontal fixed plate 101 in the horizontal direction. The fixed platform 103 is fixed to the end of the horizontal moving plate 102. The cylinder body of the third telescopic cylinder 104 is fixed to the horizontal fixed plate 101, and its telescopic end is connected to the fixed platform 103. The vertical fixed plate 105 is fixed to the fixed platform 103. The vertical moving plate 106 is slidably fitted onto the vertical fixed plate 105 in the vertical direction. The mounting platform 107 is fixed to the end of the vertical moving plate 106, and the welding torch 61 is mounted on the mounting platform 107. The cylinder body of the fourth telescopic cylinder 108 is fixed to the vertical fixed plate 105, and its telescopic end is connected to the mounting platform 107. When the rotating mechanism 90 rotates the welding torch 61 to the welding position, the third telescopic cylinder 104 is activated, pushing the fixed platform 103 and all its components to move horizontally, thus enabling the welding torch 61 to feed forward and backward. The fourth telescopic cylinder 108 is activated, pushing the mounting platform 107 and the welding torch 61 to move vertically, thus enabling the welding torch 61 to rise and fall to align with the weld. This two-dimensional coordinate adjustment mechanism driven by telescopic cylinders has a compact structure, and the space occupied after the telescopic cylinders are retracted is minimal, effectively solving the problem of limited activity space caused by the dense arrangement of surrounding steel sections, ensuring that the welding torch 61 can accurately reach the target weld.

[0032] In order to allow for immediate weld grinding after welding, in one embodiment, such as Figure 6As shown, another set of positioning mechanisms 100 is also provided on the rotating table 93. The angle between the opposing center lines of the two sets of positioning mechanisms 100 is 90°, and an angle grinder 150 is installed on the mounting platform 107 of the other set of positioning mechanisms 100. When the welding torch 61 on the first positioning mechanism 100 completes a weld, the rotary motor 92 drives the rotating table 93 to rotate 90°, and the original welding torch 61 leaves the welding position. The other set of positioning mechanisms 100, which is equipped with the angle grinder 150, rotates to be above the completed weld. Through its own horizontal and vertical movement mechanism, position compensation is performed, and the weld can be ground immediately. The two sets of mechanisms are arranged at 90 degrees, realizing seamless connection and non-interference in space between the welding and grinding processes.

[0033] In one embodiment, to maximize the use of the tabletop space of the square worktable 10, the upper surface of the worktable 10 is square, and four sets of linear motion mechanisms 20 are arranged along the four sides of the square. The length direction of each mechanism is perpendicular to the corresponding side and points to the center, so that the four feed strokes are symmetrical and equal, which natively matches the assembly requirements of the square frame.

[0034] The specific implementation process of this application includes the following steps: S101. The four steel sections are respectively clamped onto the four sets of steel section holding mechanisms 40, and each steel section holding mechanism 40 centers and fixes the corresponding steel section. S102. Start the synchronous drive mechanism 50 to drive the output ends of the four linear motion mechanisms 20 to move synchronously toward the center of the upper surface of the worktable 10, so that the ends of the four steel sections come together and are spliced ​​together in the central area to form a closed frame. S103. Move the welding torch 61 to the joint of the adjacent steel section and perform welding.

[0035] The alignment process in step S101 is further refined as follows: the steel profile is aligned in posture through the conveying channel formed by the ball bearings 412 and the adjustable conveyor belt 413, and the contact state between the steel profile and the conveyor belt 413 is detected by the first pressure sensor 110 to achieve positioning detection. This composite alignment strategy of "mechanical limit calibration + electronic sensing confirmation" ensures the consistency of the reference for each steel profile.

[0036] Following the welding step S103, the process further includes: S104, grinding the weld seam using an angle grinder 150. This post-processing step is directly integrated into the equipment's work cycle, eliminating the need to disassemble the workpiece or transfer it to the grinding station. It completes the entire process from raw material to finished surface-treated product in one go, greatly improving production line efficiency.

[0037] It should be noted that in some optional embodiments, the worktable 10 can be made of casting or welded from thick steel plates, and the upper surface needs to be milled to ensure flatness. The horizontal frame 21 can be made of high-strength cast iron or steel and is connected to the worktable 10 by bolt fastening. The lead screw 23 can be a trapezoidal lead screw or a ball screw, with the trapezoidal lead screw having better self-locking performance. The guide rail 22 and the slider 24 can be matched with a linear guide rail to ensure movement accuracy. The ball bearing 412 is made of bearing steel and is embedded or riveted into the wall plate holes of the U-shaped frame 411, allowing it to rotate freely. The conveyor belt 413 is a flat belt made of rubber or polyurethane, and a steel plate can be added to the back to transmit clamping force. The first telescopic cylinder 414, the second telescopic cylinder 421, the third telescopic cylinder 104, and the fourth telescopic cylinder 108 are all hydraulic cylinders, pneumatic cylinders, or electric cylinders, and the specific selection depends on the power configuration of the production line. In some alternative embodiments, if the steel profile is made of a non-ferromagnetic material (such as aluminum alloy or stainless steel), the electromagnetic plate 422 can be replaced with a vacuum chuck.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An intelligent welding device for steel structure processing and assembly, characterized in that, include: Workbench; Four linear motion mechanisms are arrayed on the upper surface of the worktable, and the output end of each linear motion mechanism can move linearly in a direction toward or away from the center of the upper surface of the worktable. Mounting bracket, fixedly connected to the output end of each linear motion mechanism; A steel section retaining mechanism is provided on the mounting frame to fix and hold a single steel section in a predetermined position; The synchronous drive mechanism is connected to the four sets of linear motion mechanisms to drive the four output ends to move synchronously, so that the four steel sections move synchronously toward the center and are assembled in the central area to form a closed steel frame. The welding mechanism is used to weld the joints of adjacent steel sections of the assembled steel frame.

2. The steel structure processing and welding device according to claim 1, characterized in that, The linear motion mechanism includes: A horizontal frame is fixed to the upper surface of the workbench; A guide rail extending along the direction of movement is provided on the horizontal frame; A lead screw is rotatably supported on the horizontal frame and extends along the direction of movement; A slider that slides with the guide rail and is threadedly connected to the lead screw, the slider forming the output end of the linear motion mechanism, and the mounting bracket being fixed on the slider.

3. The steel structure processing and welding device according to claim 2, characterized in that, The synchronous drive mechanism includes: Drive motor; The main gear is driven and connected to the output shaft of the drive motor; Four bevel gears are coaxially fixed to the inner ends of the lead screws of four sets of linear motion mechanisms, and all mesh with the main gear.

4. The steel structure processing and welding device according to claim 1, characterized in that, The steel section retaining mechanism includes a centering mechanism, which includes: A U-shaped frame, fixed to the mounting bracket, has a channel with a central opening; Multiple ball bearings are rotatably disposed on one side wall of the U-shaped frame cavity near the center of the worktable and on the bottom wall of the cavity. A conveyor belt is located on the side of the U-shaped frame away from the center of the worktable, with its conveying surface facing the side wall containing the ball bearings; The first telescopic cylinder has its cylinder body fixed on the U-shaped frame, and its telescopic end is connected to the conveyor belt to adjust the distance between the conveying surface and the opposite side wall, thereby forming a conveying channel with adjustable width for accommodating and conveying single steel sections.

5. The steel structure processing and welding device according to claim 4, characterized in that, Also includes: A first pressure sensor is disposed between the conveyor belt and the telescopic end of the first telescopic cylinder; A measuring sensor, mounted on the U-shaped frame and electrically connected to the motor of the conveyor belt, is used to detect the moving position of a single steel section.

6. The steel structure processing and welding device according to claim 5, characterized in that, The steel section retaining mechanism further includes a fixing mechanism, which includes: The second telescopic cylinder is vertically mounted on the mounting frame; An electromagnetic plate, connected to the telescopic end of the second telescopic cylinder, is used to adsorb and fix a single steel section. The second pressure sensor is located between the telescopic end of the second telescopic cylinder and the electromagnetic plate; The top of the mounting bracket and the bottom of the U-shaped bracket are provided with a through hole, and the telescopic end of the second telescopic cylinder can pass through the through hole to raise the electromagnetic plate to the adsorption position.

7. The steel structure processing and welding device according to claim 1, characterized in that, A fixed frame is fixed at the center of the upper surface of the workbench, and the synchronous drive mechanism is mounted on the fixed frame; The fixed frame is also equipped with a rotating mechanism, and the rotating output end of the rotating mechanism is connected to a positioning mechanism. The welding torch of the welding mechanism is installed on the execution end of the positioning mechanism.

8. The steel structure processing and welding device according to claim 7, characterized in that, The rotating mechanism includes: The rotating roller is vertically and rotatably mounted on the fixed frame via bearings; A rotary motor is mounted on the fixed frame and driven by the rotating roller. A rotating platform is coaxially fixed to the top of the rotating roller, and the positioning mechanism is disposed on the rotating platform.

9. The steel structure processing and welding device according to claim 8, characterized in that, The positioning mechanism includes: A horizontal fixing plate is fixed to the rotating output end; A horizontally movable plate is slidably fitted onto the horizontally fixed plate in a horizontal direction; A fixed platform is fixed to the end of the horizontally movable plate; The third telescopic cylinder has its cylinder body fixed to the horizontal fixed plate, and its telescopic end connected to the fixed platform. A vertical fixing plate is fixed to the fixing platform; A vertically movable plate is slidably fitted onto the vertically fixed plate along the vertical direction; The mounting platform is fixed to the end of the vertically movable plate, and the welding torch is mounted on the mounting platform. The fourth telescopic cylinder has its cylinder body fixed to the vertical fixing plate, and its telescopic end is connected to the mounting platform.

10. The steel structure processing and welding device according to claim 9, characterized in that, The rotating platform is also equipped with another set of positioning mechanisms. The angle between the opposing center lines of the two sets of positioning mechanisms is 90°. An angle grinder is installed on the mounting platform of the other set of positioning mechanisms to grind the weld that has been welded.

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