A large-size workpiece welding device

Abstract

The utility model relates to welding equipment field especially, and it is a kind of large-size workpiece welding device, including welding manipulator, and welding manipulator is installed on cantilever crane;Cantilever crane is slidably arranged on linear translation mechanism one;The side parallelism of linear translation mechanism one is provided with guide rail one;Two turnover clamping mechanisms are slidably arranged on guide rail one;Turnover clamping mechanism is used to clamp large-size workpiece end, and large-size workpiece can be driven to turn over;Lifting platform is fixedly arranged in the middle of guide rail one. Through the cooperation of welding manipulator and slidable cantilever crane, linear translation mechanism one is greatly expanded welding operation coverage, and large-size workpiece global dead angle welding is realized;Two relatively slidable turnover clamping mechanisms can flexibly adjust spacing to adapt to different length workpieces, and can also independently drive workpiece to turn over, without external hoisting, simplify operation and improve turnover efficiency.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment, and in particular to a welding device for large-size workpieces. Background Technology

[0002] In fields such as engineering machinery and pressure vessels, there is a significant demand for welding large-size plate-shaped workpieces with a capacity of 30 tons and a size of 10m×4m. These workpieces have stringent requirements for weld continuity, forming accuracy, and welding efficiency. Their welding requires stable clamping, flexible adjustment, and multi-process coordination, which is a key factor restricting the industry's capacity improvement.

[0003] Although the industry is currently transitioning towards automation, such as using welding robots to replace manual labor, adjusting the work position with simple translation guides, or using fixed positioners to achieve partial workpiece flipping; for lightweight workpieces ≤5 tons and ≤5m, a "robot + fixed clamping table" system has also been formed, but none of these are suitable for large-sized workpieces.

[0004] Existing technologies have significant drawbacks: First, the welding robot's coverage is insufficient; traditional installation or single translational structures cannot achieve full-area welding of large workpieces, requiring frequent workpiece adjustments that lead to weld interruptions. Second, the clamping and flipping adaptability is poor; the fixed clamping device cannot flexibly adjust the spacing, and flipping relies on external hoisting, which is time-consuming and prone to displacement. Third, the middle of the workpiece is prone to collapse; the lack of a supporting structure leads to bending deformation, affecting weld accuracy. Fourth, there is no coordinated control among the mechanisms, requiring manual operation, resulting in low automation and failing to meet the requirements for efficient continuous welding. These problems all need to be addressed specifically. Utility Model Content

[0005] To address the current problems of insufficient coverage of welding robots, the inability of traditional installation or single translation structure to achieve full-area welding of large-sized workpieces, the need for frequent workpiece adjustments leading to weld interruptions, poor compatibility of clamping and flipping, the inability of fixed clamping devices to flexibly adjust spacing, reliance on external hoisting for flipping which is time-consuming and prone to displacement, this utility model provides a welding device for large-sized workpieces.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: A welding device for large-sized workpieces includes a welding robot mounted on a cantilever crane. The cantilever crane is slidably mounted on a linear translation mechanism. A guide rail is parallel to one side of the linear translation mechanism. Two flipping clamping mechanisms are slidably mounted on the guide rail. These flipping clamping mechanisms are used to clamp the ends of the large-sized workpiece and can flip the workpiece over. A lifting platform is fixedly mounted in the middle of the guide rail. Through the cooperation of the welding robot, the sliding cantilever crane, and the linear translation mechanism, the welding operation coverage is significantly expanded, achieving full-area welding of large-sized workpieces without dead angles. The two relatively slidable flipping clamping mechanisms can flexibly adjust their spacing to adapt to workpieces of different lengths and can autonomously flip the workpiece, eliminating the need for external hoisting, simplifying operation, and improving flipping efficiency. The lifting platform in the middle of the guide rail effectively supports the middle of the workpiece, preventing deformation caused by its own weight and ensuring welding accuracy. The overall structure works synergistically to significantly improve the automation level and efficiency of welding large-sized workpieces and reduce the risk of welding errors.

[0007] Preferably, the linear translation mechanism includes a guide rail; a cantilever slidably mounted on the guide rail; a motor is installed at the lower part of the cantilever; a gear is mounted on the motor output shaft, and the gear meshes with a rack; the rack is installed on one side of the guide rail. This linear translation mechanism uses a gear and rack meshing transmission method, combined with the guidance of the guide rail, resulting in precise transmission, direct power transmission, and smooth operation. It can drive the cantilever to achieve high-precision linear movement, ensuring precise control of the welding robot's working position. Simultaneously, it has a simple and reliable structure, is easy to maintain, and the motor provides stable power, meeting the efficient and stable translation requirements of the cantilever during the welding of large workpieces, providing a reliable guarantee for welding without dead angles throughout the entire area.

[0008] Preferably, a second linear translation mechanism is provided on the cantilever crane; the welding robot is mounted on the second linear translation mechanism. Adding the second linear translation mechanism and mounting the welding robot on the cantilever crane further expands the working movement dimension of the welding robot. Working in conjunction with the first linear translation mechanism, it allows for flexible adjustment of the welding robot's working position in different directions, quickly and accurately aligning it with the weld seams of large workpieces. This eliminates the need for frequent adjustments to the workpiece or the overall position of the cantilever crane, effectively reducing welding interruptions, improving welding continuity and work efficiency, while ensuring welding position control accuracy, thus providing support for high-quality welding.

[0009] Preferably, the second linear translation mechanism includes a lead screw guide unit and a sliding plate mounted on the lead screw guide unit; the welding robot is mounted on the sliding plate. This second linear translation mechanism adopts a combined structure of the lead screw guide unit and the sliding plate, which provides high transmission accuracy, smooth guidance, and precise positioning. It can drive the welding robot to achieve high-precision linear movement within a small range; the working position of the welding robot can be flexibly fine-tuned, accurately aligning with the weld details of large workpieces, further improving the welding position control accuracy. Simultaneously, it operates smoothly without jamming, ensuring the continuity of the welding process and providing reliable local position adjustment support for high-quality, high-efficiency welding.

[0010] Preferably, the flipping clamping mechanism includes a base; a rotating platform is mounted on the opposite surface of the bases of the two flipping clamping mechanisms; a fixed frame is mounted on the rotating platform; a mounting table is mounted on the fixed frame; and a clamping component is mounted on the mounting table. This flipping clamping mechanism provides stable support through the base, and the rotating platform can drive the fixed frame, mounting table, and clamping component to flip synchronously, enabling large-sized workpieces to flip autonomously without external hoisting assistance. The two oppositely arranged flipping clamping mechanisms, in conjunction with the clamping component, can reliably fix the end of the workpiece, providing strong clamping stability and preventing workpiece displacement during welding. The overall structure is compact and firmly connected, with smooth and precise flipping action, ensuring both flipping efficiency and reliable support for welding accuracy, adapting to the clamping and flipping requirements of large-sized workpieces.

[0011] Preferably, the clamping assembly includes a bidirectional screw rotatably mounted on a mounting platform; both nuts of the bidirectional screw are connected to slides; each slide is equipped with a clamping unit; a drive motor is connected to the middle of the bidirectional screw; the slides are slidably mounted on guide rail three; and guide rail three is mounted on the mounting platform. This clamping assembly, through the drive motor, rotates the bidirectional screw, which, in conjunction with the guide rail three, guides the two slides to move synchronously in opposite directions, thereby driving the clamping units to precisely and securely clamp / release the ends of large workpieces, adapting to the clamping requirements of workpieces of different widths.

[0012] Preferably, the axis of the bidirectional screw is perpendicular to the first guide rail. This perpendicularity allows the clamping unit to open and close precisely along the width of the workpiece, adapting to the clamping requirements of workpieces of different widths while ensuring clamping alignment and stability.

[0013] Preferably, the clamping unit includes a sliding frame; a jaw is hinged to the sliding frame; the middle of the jaw is hinged to the sliding frame; one end of the jaw is hinged to the piston rod of the hydraulic cylinder; the cylinder body of the hydraulic cylinder is mounted on the sliding frame; a lower clamping plate is installed on the sliding frame at the end that cooperates with the jaw away from the hydraulic cylinder. This clamping unit uses a hydraulic cylinder to drive the lever-type jaw, which, in conjunction with the lower clamping plate, achieves stable clamping of the end of a large-sized workpiece. The clamping force is sufficient, the operation is reliable, and workpiece displacement is effectively avoided during welding.

[0014] Preferably, two support plates are spaced apart in the middle of the guide rail three; the two support plates are arranged in parallel. The two parallel support plates in the middle of the guide rail three can provide reliable support for the middle of large-sized workpieces, preventing the workpieces from collapsing due to their own weight after clamping, while also enhancing the load-bearing stability of the guide rail three, ensuring smooth sliding of the slide table and clamping accuracy.

[0015] Preferably, the lifting platform is a scissor lift. As a lifting platform, the scissor lift has strong load-bearing capacity, stable lifting, and reliable support. It can effectively support the middle of large workpieces to prevent them from collapsing under their own weight, thus ensuring welding accuracy.

[0016] As can be seen from the above technical solutions, the advantages of this utility model include: by cooperating with the welding robot, the sliding cantilever crane, and the linear translation mechanism, the welding operation coverage is greatly expanded, realizing full-area welding of large-sized workpieces without dead angles; the two relatively sliding flipping clamping mechanisms can flexibly adjust the spacing to adapt to workpieces of different lengths, and can also autonomously drive the workpiece to flip over without external hoisting, simplifying operation and improving flipping efficiency; the lifting platform in the middle of the guide rail can effectively support the middle of the workpiece, avoiding deformation caused by its own weight, and ensuring welding accuracy; the overall structure works together to significantly improve the automation level and operation efficiency of welding large-sized workpieces, and reduce the risk of welding errors. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0019] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure 3 for Figure 1 Enlarged diagram of point B in the middle.

[0021] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0022] Figure 5 for Figure 4 Enlarged diagram of point C in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1-Welding robot, 2-Cantilever crane, 3-Linear translation mechanism one, 4-Guide rail one, 5-Lifting platform, 6-Linear translation mechanism two, 7-Base, 8-Rotating platform, 9-Fixed frame, 10-Mounting platform, 11-Double-actuator screw, 12-Slide table, 13-Guide rail three, 14-Slide frame, 15-Gripper, 16-Hydraulic cylinder, 17-Lower clamping plate, 18-Support plate; 301-Guide rail 2, 302-Motor, 303-Rack; 601-Lead screw guide rail unit, 602-Slide plate. Detailed Implementation

[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0025] like Figure 1 , Figure 4 As shown, a welding device for large-sized workpieces includes a welding robot 1, which is mounted on a cantilever crane 2. The cantilever crane 2 is slidably mounted on a linear translation mechanism 3. A guide rail 4 is arranged parallel to one side of the linear translation mechanism 3. Two flipping clamping mechanisms are slidably mounted on the guide rail 4. The flipping clamping mechanisms are used to clamp the ends of large-sized workpieces and can drive the large-sized workpieces to flip over. A lifting platform 5 is fixedly mounted in the middle of the guide rail 4.

[0026] By cooperating with the welding robot 1, the sliding cantilever 2, and the linear translation mechanism 3, the welding operation coverage is greatly expanded, enabling welding of large-sized workpieces across the entire area without dead angles. The two relatively sliding flipping clamping mechanisms can flexibly adjust the spacing to adapt to workpieces of different lengths and can also autonomously flip the workpieces without external hoisting, simplifying operation and improving flipping efficiency. The lifting platform 5 in the middle of the guide rail 4 can effectively support the middle of the workpiece, preventing deformation caused by its own weight and ensuring welding accuracy. The overall structure works together to significantly improve the automation level and operation efficiency of welding large-sized workpieces and reduce the risk of welding errors.

[0027] In the above configuration, the cantilever crane 2 is equipped with a linear translation mechanism 2 6; the welding robot 1 is mounted on the linear translation mechanism 2 6. The linear translation mechanism 2 6 includes a lead screw guide unit 601 and a sliding plate 602 mounted on the lead screw guide unit 601; the welding robot 1 is mounted on the sliding plate 602. The lifting platform 5 is a scissor lift.

[0028] A linear translation mechanism 2 6 is added to the cantilever crane 2, and a welding robot 1 is installed, further expanding the working movement dimension of the welding robot 1. Working in conjunction with the linear translation mechanism 1 3, the working position of the welding robot 1 can be flexibly adjusted in different directions, quickly and accurately aligning with the weld seams of large workpieces. This eliminates the need for frequent adjustments to the workpiece or the overall position of the cantilever crane 2, effectively reducing welding interruptions, improving welding continuity and work efficiency, while ensuring welding position control accuracy, providing support for high-quality welding. The linear translation mechanism 2 6 adopts a combined structure of a lead screw guide unit 601 and a sliding plate 602, providing high transmission accuracy, stable guidance, and precise positioning. It can drive the welding robot 1 to achieve high-precision linear movement within a small range. The working position of the welding robot 1 can be flexibly fine-tuned, accurately aligning with the weld seam details of large workpieces, further improving welding position control accuracy. Simultaneously, its smooth operation without jamming ensures the continuity of the welding process, providing reliable local position adjustment support for high-quality, high-efficiency welding. As a lifting platform, the scissor lift has a strong load-bearing capacity, stable lifting and reliable support. It can effectively lift the middle of large workpieces to prevent them from collapsing under their own weight and ensure welding accuracy.

[0029] like Figure 2 As shown, the linear translation mechanism 3 includes a guide rail 301; a cantilever 2 is slidably mounted on the guide rail 301; a motor 302 is mounted on the lower part of the cantilever 2; a gear is mounted on the output shaft of the motor 302, and the gear meshes with a rack 303; the rack 303 is mounted on one side of the guide rail 301. This linear translation mechanism 3 uses a gear and rack 303 meshing transmission method, combined with the guidance of the guide rail 301, resulting in precise transmission, direct power transmission, and smooth operation. It can drive the cantilever 2 to achieve high-precision linear movement, ensuring precise control of the welding robot 1's working position. At the same time, the structure is simple and reliable, and maintenance is convenient. The motor 302 provides stable power, meeting the efficient and stable translation requirements of the cantilever 2 when welding large workpieces, providing reliable assurance for welding without dead angles throughout the entire area.

[0030] like Figure 3 , Figure 5As shown, the flipping clamping mechanism includes a base 7; a rotating platform 8 is mounted on the opposite surface of the base 7 of the two flipping clamping mechanisms; a fixing frame 9 is mounted on the rotating platform 8; a mounting table 10 is mounted on the fixing frame 9; and a clamping assembly is mounted on the mounting table 10. The clamping assembly includes a bidirectional screw 11 rotatably mounted on the mounting table 10; two nuts of the bidirectional screw 11 are connected to slides 12; each slide 12 is equipped with a clamping unit; a drive motor is connected to the middle of the bidirectional screw 11; the slides 12 are slidably mounted on guide rail 4; and guide rail 4 is mounted on the mounting table 10. The axis of the bidirectional screw 11 is perpendicular to guide rail 4. The flipping clamping mechanism is stably supported by the base 7. The rotating platform 8 can drive the fixing frame 9, mounting table 10, and clamping components to flip synchronously, enabling large workpieces to flip autonomously without external hoisting assistance. Two opposing flipping clamping mechanisms, together with the clamping components, can reliably fix the end of the workpiece, providing strong clamping stability and preventing workpiece displacement during welding. The overall structure is compact and firmly connected, with smooth and precise flipping action, ensuring both flipping efficiency and reliable support for welding accuracy, adapting to the clamping and flipping requirements of large workpieces. The clamping component drives the bidirectional screw 11 to rotate via a drive motor, which, in conjunction with the guide rail 13, guides the two slides 12 to move synchronously in opposite directions, driving the clamping unit to precisely and stably clamp / release the end of large workpieces, adapting to the clamping requirements of workpieces of different widths. The axis of the bidirectional screw 11 is perpendicular to the guide rail 4, allowing the clamping unit to open and close precisely along the width direction of the workpiece, adapting to the clamping requirements of workpieces of different widths, while ensuring clamping centering and stability.

[0031] In the above configuration, the clamping unit includes a sliding frame 14; a gripper 15 is hinged to the sliding frame 14; the middle of the gripper 15 is hinged to the sliding frame 14; one end of the gripper 15 is hinged to the piston rod of the hydraulic cylinder 16; the cylinder body of the hydraulic cylinder 16 is mounted on the sliding frame 14; a lower clamping plate 17 is installed on the end of the sliding frame 14 that cooperates with the gripper 15 and is away from the hydraulic cylinder 16.

[0032] The clamping unit drives the lever-type gripper 15 through the hydraulic cylinder 16, which works in conjunction with the lower clamping plate 17 to achieve a stable clamping of the end of a large workpiece. The clamping force is sufficient and the operation is reliable, effectively preventing the workpiece from shifting during welding.

[0033] The guide rail 3 13 has two support plates 18 spaced apart in the middle; the two support plates 18 are arranged in parallel. The two parallel support plates 18 in the middle of the guide rail 3 13 can provide reliable support for the middle of large workpieces, preventing the workpieces from collapsing due to their own weight after clamping, while also enhancing the load-bearing stability of the guide rail 3 13 and ensuring smooth sliding and clamping accuracy of the slide table 12.

[0034] The working principle of this large-size workpiece welding device is as follows: First, based on the length of the large-size workpiece, the drive motor drives the bidirectional screw 11 to rotate, causing the slides 12 of the two flipping clamping mechanisms to move synchronously towards each other along the guide rail 3 13, adjusting the spacing between the clamping units. Then, the hydraulic cylinder 16 drives the lever-type gripper 15 to cooperate with the lower clamping plate 17 to firmly clamp both ends of the workpiece. The support plate 18 in the middle of the guide rail 3 13 and the scissor-type hydraulic lift in the middle of the guide rail 4 rise synchronously, supporting the ends and middle of the workpiece respectively, preventing the workpiece from collapsing due to its own weight. Subsequently, the motor 302 of the linear translation mechanism 3... The drive gear meshes with the rack 303, causing the cantilever crane 2 to translate along the guide rail 301. At the same time, the lead screw guide unit 601 of the linear translation mechanism 6 drives the slide plate 602 to move. The dual translation works together to adjust the working position of the welding robot 1, achieving full coverage of the weld seam on the workpiece. When it is necessary to flip the workpiece during the welding process, the rotating platform 8 drives the fixed frame 9, the mounting platform 10 and the clamped workpiece to flip synchronously without the need for external hoisting assistance. After flipping, the robot position is adjusted by the translation mechanism to complete the welding of the remaining weld seam. The entire process achieves efficient and precise welding of large-sized workpieces through the collaboration of various mechanisms.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A welding device for large-size workpieces, comprising a welding robot (1), characterized in that, The welding robot (1) is mounted on the cantilever (2); the cantilever (2) is slidably mounted on the linear translation mechanism (3); a guide rail (4) is parallel to one side of the linear translation mechanism (3); two flipping clamping mechanisms are slidably mounted on the guide rail (4); the flipping clamping mechanism is used to clamp the end of a large workpiece and can drive the large workpiece to flip over; a lifting platform (5) is fixedly mounted in the middle of the guide rail (4).

2. The large-size workpiece welding device according to claim 1, characterized in that, The linear translation mechanism (3) includes a guide rail (301); a cantilever crane (2) is slidably mounted on the guide rail (301); a motor (302) is installed on the lower part of the cantilever crane (2); a gear is installed on the output shaft of the motor (302), and the gear meshes with a rack (303); the rack (303) is installed on one side of the guide rail (301).

3. The large-size workpiece welding device according to claim 1, characterized in that, A linear translation mechanism 2 (6) is installed on the cantilever crane (2); the welding robot (1) is installed on the linear translation mechanism 2 (6).

4. The large-size workpiece welding device according to claim 3, characterized in that, The linear translation mechanism 2 (6) includes a lead screw guide unit (601) and a slide plate (602) mounted on the lead screw guide unit (601); the welding robot (1) is mounted on the slide plate (602).

5. The large-size workpiece welding device according to claim 1, characterized in that, The flip clamping mechanism includes a base (7); a rotating platform (8) is mounted on the opposite surface of the base (7) of the two flip clamping mechanisms; a fixed frame (9) is mounted on the rotating platform (8); a mounting table (10) is mounted on the fixed frame (9); and a clamping assembly is mounted on the mounting table (10).

6. The large-size workpiece welding device according to claim 5, characterized in that, The clamping assembly includes a bidirectional screw (11) rotatably mounted on a mounting platform (10); both nuts of the bidirectional screw (11) are connected to slides (12); each slide (12) is equipped with a clamping unit; a drive motor is connected to the middle of the bidirectional screw (11); the slides (12) are slidably mounted on guide rail three (13); guide rail three (13) is mounted on the mounting platform (10).

7. The large-size workpiece welding device according to claim 6, characterized in that, The axis of the bidirectional screw (11) is perpendicular to the guide rail (4).

8. The large-size workpiece welding device according to claim 6, characterized in that, The clamping unit includes a sliding frame (14); a clamping jaw (15) is hinged on the sliding frame (14); the middle part of the clamping jaw (15) is hinged on the sliding frame (14); one end of the clamping jaw (15) is hinged on the piston rod of the oil cylinder (16); the cylinder body of the oil cylinder (16) is mounted on the sliding frame (14); a lower clamping plate (17) is installed on the end of the sliding frame (14) that cooperates with the clamping jaw (15) away from the oil cylinder (16).

9. The large-size workpiece welding device according to claim 8, characterized in that, Two support plates (18) are spaced apart in the middle of the guide rail (13); the two support plates (18) are arranged in parallel.

10. The large-size workpiece welding device according to claim 1, characterized in that, The lifting platform (5) is a scissor lift hydraulic lift.

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