A multi-specification channel steel clamping positioning welding device

Abstract

The present application relates to the technical field of H-shaped steel clamping positioning welding, and discloses a multi-specification H-shaped steel clamping positioning welding device, which comprises a support, the top of the support is fixedly connected with mounting rods on the left side and the right side, and the top of the mounting rod is provided with a clamping assembly. In the present application, the welding device is driven by motor one driving gear one along the rack one, drives the connecting plate one to translate along the slide rail one, can be suitable for H-shaped steel workpieces of different lengths, cooperates with the clamping opening adjustment of the four-jaw disc, stably clamps workpieces of different web thicknesses; meanwhile, the limiting assembly one and the limiting assembly two are driven to slide along the slide rail by the meshing transmission of the gear and the rack, adjust the clamping spacing of the rotating rod, can be suitable for H-shaped steels of different cross-section heights and flange widths, can cover multi-specification workpiece production, need not replace special tooling, greatly reduces the type changing debugging time and tooling investment, the clamping assembly realizes flexible clamping adaptation of multi-specification H-shaped steels, and reduces tooling cost.

Description

Technical Field

[0001] This invention relates to the field of clamping, positioning, and welding technology for I-beams, and particularly to a clamping, positioning, and welding device for I-beams of various specifications. Background Technology

[0002] I-beams are long, load-bearing steel sections with an I-shaped cross-section. They consist of two parallel flanges connected vertically in the middle by a web. They are core steel profiles in building structures, bridges, and engineering machinery. The term "multi-specification I-beams" does not refer to a specific type of steel, but rather to a general term encompassing various cross-sectional dimensions and parameter series. Besides hot-rolled standard profiles, non-standard I-beams are often manufactured in engineering by cutting and welding steel plates. Custom heights, flange widths, and thicknesses are tailored to specific load and span requirements, further enriching the range of I-beams available. Within the specified range, the components are assembled and welded; for butt welding and node welding, the clamping and positioning welding device is the core process equipment of this process. It is suitable for multi-specification production, reducing tooling costs and changeover losses. Traditional welding tooling is mostly a rigid fixture dedicated to a single specification, which can only match one cross-sectional size. When production covers more than ten or even dozens of standard and non-standard I-beams, making a separate fixture for each specification will significantly increase the tooling procurement cost. Moreover, each changeover requires re-adjustment and calibration, which takes up a lot of production time. Frequent changeovers can also easily lead to fluctuations in positioning accuracy.

[0003] Existing welding fixtures for I-beams are mostly single-specification rigid clamps, which can only match I-beam workpieces with fixed cross-sectional dimensions. When producing I-beams with various standard or non-standard specifications, multiple sets of corresponding fixtures need to be manufactured, resulting in high costs for tooling procurement and maintenance. Furthermore, changing production models requires repeated disassembly and recalibration of fixtures, which is time-consuming and can lead to fluctuations in positioning accuracy, failing to meet the demands of flexible production across multiple specifications. In traditional I-beam welding operations, the workpiece welding end relies solely on simple blocks or manual visual alignment, lacking a multi-level centering and limiting structure, easily leading to problems such as misalignment and excessive coaxiality deviation. During welding, the workpiece is affected by welding stress generated by localized high temperatures, easily causing displacement and flange angle deformation, resulting in uneven weld formation, high defect rates, and a large workload for subsequent straightening and rework, leading to poor product quality stability. Existing welding equipment has independent clamping and positioning functions and welding adjustment functions. After workpiece clamping, manual adjustments to the welding position and workpiece posture are required multiple times, making the alignment process cumbersome and difficult to achieve precise fine-tuning of the welding position. Moreover, most equipment relies on manual welding or semi-automated welding, resulting in poor workflow integration, low overall production efficiency, and difficulty in adapting to the production pace of industrialized batch welding.

[0004] To address the aforementioned issues, a multi-specification I-beam clamping, positioning, and welding device is proposed. Summary of the Invention

[0005] To overcome the above shortcomings, this invention provides a clamping and positioning welding device for multi-specification I-beams, which aims to improve the existing I-beam welding fixtures, which are mostly single-specification rigid clamps, have poor adaptability, high changeover costs, insufficient welding end limiting, and are prone to alignment deviation and welding deformation. In addition, the clamping and adjustment functions are disconnected, making it difficult to meet the efficiency and quality requirements of multi-specification batch production.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-specification I-beam clamping and positioning welding device, comprising a bracket, mounting rods fixedly connected to the front and rear sides of the top of the bracket, a clamping assembly provided on the top of the mounting rods, a power control box fixedly connected to the left side of the inner wall of the bracket, a connecting frame fixedly installed on the rear side of the mounting rods, an adjustment assembly provided in the middle of the inner wall of the bracket, a laser welding assembly provided on the left side of the bracket, a second limiting assembly provided on the left side of the laser welding assembly, and a first limiting assembly provided on the left side of the second limiting assembly. The clamping assembly includes two slide rails, both of which are fixedly connected to the top of the mounting rod. A slider is slidably connected to the outer wall of each slide rail, and a connecting plate is fixedly connected to the top of each slider. A motor is fixedly connected to the top right side of the inner wall of the connecting plate, and a gear is fixedly connected to the output end of the motor. A rack is fixedly connected to the inner rear end of the mounting rod. A connecting plate is fixedly connected to the top left side of the connecting plate, and a clamping driver is fixedly connected to the rear side of the connecting plate. A four-jaw disc is fixedly connected to the inner left side of the connecting plate.

[0007] As a further description of the above technical solution: The adjustment assembly includes a connecting plate three, which is fixedly connected to the middle of the inner wall of the bracket. A motor two is fixedly connected to the bottom of the connecting plate three, and a drive rod one is fixedly connected to the output end of the motor two. A fixed seat passes through the bottom of the outer wall of the drive rod one, and a mounting plate one is slidably connected to the middle of the outer wall of the drive rod one. Multiple sliders two are fixedly connected to the right side of the mounting plate one, and slide rails two are slidably connected to the inner walls of the multiple sliders two. A low cylinder is fixedly connected to the front left side of the mounting plate one, and a cylinder is fixedly connected to the rear left side of the mounting plate one. A connecting rod one is rotatably connected to the output end of the cylinder, and a connecting rod two is rotatably connected to the inner wall of the connecting rod one. A drive rod two is fixedly installed on the inner wall of the connecting rod two, and a U-shaped block one is fixedly connected to the top of the drive rod two. A rotating rod one is rotatably connected to the inner wall of the U-shaped block one.

[0008] As a further description of the above technical solution: The laser welding assembly includes a mounting bracket, which is fixedly connected to the left side of a support. A transverse driver is fixedly connected to the top left side of the mounting bracket. A longitudinal driver is fixedly installed on the inner wall of the transverse driver. A laser welder is fixedly installed on the left side of the longitudinal driver.

[0009] As a further description of the above technical solution: The limiting component two includes a mounting plate two, which is fixedly connected to the bottom left side of the mounting frame. An adjusting plate is fixedly connected to the inner wall of the mounting plate two, and a rotary driver is fixedly connected to the inner wall of the adjusting plate. A mounting plate three is fixedly connected to the left side of the rotary driver. A U-shaped block three is fixedly installed on the top left side of the mounting plate three. An adjusting rod two is installed on the inner wall of the U-shaped block three. A movable plate three is fixedly connected to the bottom of the adjusting rod two. A rack four is slidably connected to the inner side of the movable plate three. A movable plate four is fixedly connected to the bottom of the rack four. A rotating rod three is rotatably connected to the top of the movable plate four. A rack five is fixedly connected to the outer side of the movable plate three. Gear three is rotatably connected to both the front and rear sides of the inner wall of the mounting plate three. A slide rail four is fixedly connected to both the front and rear ends of the left side of the mounting plate three. A slider four is slidably connected to the outer wall of the slide rail four.

[0010] As a further description of the above technical solution: The limiting component includes a mounting plate, which is fixedly connected to the left side of the mounting plate. A U-shaped block is fixedly installed on the front side of the inner wall of the mounting plate. An adjusting rod is installed on the inner wall of the U-shaped block. A movable plate is fixedly connected to the rear side of the adjusting rod. A rack is slidably connected to the inner side of the movable plate. A movable plate is fixedly connected to the rear side of the rack. A rotating rod is rotatably connected to the front side of the inner wall of the movable plate. A rack is fixedly connected to the outer side of the movable plate. Gears are rotatably connected to the inner side of the inner wall of the mounting plate. Two slide rails are fixedly connected to the left side of the outer side of the mounting plate. Multiple sliders are slidably connected to the outer walls of the two slide rails. An outer plate is fixedly connected to the left side of the mounting plate.

[0011] As a further description of the above technical solution: The gear and rack are meshed together, and the four-jaw disc clamps the I-shaped steel workpiece.

[0012] As a further description of the above technical solution: The two slide rails are fixedly connected to the front and rear sides of the connecting plate, and the drive rod is installed on the top of the inner wall of the low cylinder.

[0013] As a further description of the above technical solution: The rotary driver is rotatably connected to the left side of the inner wall of the second mounting plate, and the bottom of the third movable plate is rotatably connected to the third rotating rod.

[0014] As a further description of the above technical solution: Multiple sliders four are fixedly connected to the inner wall of movable plate three and movable plate four. Gear three is meshed with rack four and rack five. Two rotating rods three fit against the I-shaped steel workpiece.

[0015] As a further description of the above technical solution: Multiple sliders are fixedly connected to the left side of the inner wall of movable plate one and movable plate two. Gear two is meshed with rack two and rack three. Two rotating rods two fit against the I-shaped steel workpiece.

[0016] The present invention has the following beneficial effects: 1. In this invention, the welding device uses a motor-driven gear in the clamping assembly to drive a rack and pinion, which in turn drives a connecting plate to move along a slide rail. This allows it to adapt to I-beams of different lengths. With the adjustment of the clamping opening of the four-jaw disc, it can stably clamp workpieces with different web thicknesses. At the same time, the limiting components one and two drive the moving plate to slide along the slide rail through the meshing of the gear and rack. This adjusts the clamping distance of the rotating rod, allowing it to adapt to I-beams with different cross-sectional heights and flange widths. This covers the production of multiple specifications of workpieces without the need to change to special tooling, significantly reducing changeover and debugging time and tooling investment. The clamping assembly achieves flexible clamping and adaptation of multiple specifications of I-beams, reducing tooling costs.

[0017] 2. In this invention, the welding device adopts a dual positioning system of main body clamping and end limiting. The four-jaw disk of the clamping component rigidly clamps and fixes the main body of the workpiece. The welding end achieves two-level centering limiting through limiting component one and limiting component two, which can completely constrain the spatial degree of freedom of the workpiece, and ensure the coaxiality of the workpiece and the alignment accuracy of the weld. The rigid constraint throughout the process can offset the deformation trend caused by welding stress, effectively reduce defects such as misalignment, flange offset, and side bending after welding, reduce the weld rework rate and subsequent straightening workload, ensure the quality stability of mass production, and improve the welding positioning accuracy and the consistency of finished product quality.

[0018] 3. In this invention, the welding device achieves precise fine-tuning of the welding posture through adjustment components. Motor 2 drives mounting plate 1 to lift and lower along slide rail 2 to adjust the workpiece height. The cylinder drives rotating rod 1 to swing and adjust the workpiece angle through linkage mechanism, which can quickly complete the fine calibration of the welding position. In conjunction with the horizontal and vertical drivers of the laser welding component, the laser welder is driven to automatically weld along the weld seam, eliminating the need for repeated manual alignment and welding, shortening the operation assistance time, improving the automation level of the device and the overall welding efficiency, adapting to the needs of mass production, and integrating adjustment and automatic welding structure to improve the overall operation efficiency. Attached Figure Description

[0019] Figure 1 This is a perspective view of the mounting rod of a multi-specification I-beam clamping and positioning welding device proposed in this invention; Figure 2 This is a schematic diagram of the mounting frame structure of a multi-specification I-beam clamping, positioning, and welding device proposed in this invention; Figure 3 This is a schematic diagram of the rotating rod structure of a multi-specification I-beam clamping and positioning welding device proposed in this invention; Figure 4 This is a schematic diagram of the connecting plate structure of a multi-specification I-beam clamping and positioning welding device proposed in this invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the connecting plate of a multi-specification I-beam clamping and positioning welding device proposed in this invention; Figure 6 This is a schematic diagram of the outer plate structure of a multi-specification I-beam clamping and positioning welding device proposed in this invention; Figure 7 This is a schematic diagram of the laser welding assembly structure of a multi-specification I-beam clamping and positioning welding device proposed in this invention; Figure 8 This is a schematic diagram of the rotating rod structure of a multi-specification I-beam clamping and positioning welding device proposed in this invention; Figure 9 This is a schematic diagram of the limiting component of a multi-specification I-beam clamping, positioning, and welding device proposed in this invention. Figure 10 This is a schematic diagram of the mounting plate structure of a multi-specification I-beam clamping and positioning welding device proposed in this invention. Figure 11 This is a schematic diagram of the limiting component two of a multi-specification I-beam clamping and positioning welding device proposed in this invention.

[0020] Legend: 1. Bracket; 2. Mounting rod; 3. Power control box; 4. Clamping assembly; 401. Connecting plate one; 402. Motor one; 403. Gear one; 404. Rack one; 405. Slide rail one; 406. Slider one; 407. Connecting plate two; 408. Four-jaw plate; 409. Clamping driver; 5. Adjustment components; 501. Connecting plate three; 502. Motor two; 503. Fixing base; 504. Drive rod one; 505. Slide rail two; 506. Slider two; 507. Mounting plate one; 508. Cylinder; 509. Connecting rod one; 510. Connecting rod two; 511. Low cylinder; 512. Drive rod two; 513. U-block one; 514. Rotating rod one; 6. Laser welding assembly; 601. Mounting bracket; 602. Lateral actuator; 603. Longitudinal actuator; 604. Laser welder; 7. Connecting frame; 8. Limiting component one; 801. Mounting plate one; 802. U-shaped block two; 803. Adjusting rod one; 804. Moving plate one; 805. Rotating rod two; 806. Slide rail three; 807. Slider three; 808. Gear two; 809. Rack two; 810. Rack three; 811. Moving plate two; 812. Outer plate; 9. Limiting component two; 901. Mounting plate two; 902. Rotary driver; 903. Adjusting plate; 904. Mounting plate three; 905. U-shaped block three; 906. Adjusting rod two; 907. Moving plate three; 908. Rotating rod three; 909. Slide rail four; 910. Slider four; 911. Gear three; 912. Rack four; 913. Rack five; 914. Moving plate four. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Reference Figure 1-11 The present invention provides an embodiment of a multi-specification I-beam clamping and positioning welding device, comprising a bracket 1, mounting rods 2 fixedly connected to the front and rear sides of the top of the bracket 1, a clamping assembly 4 provided on the top of the mounting rods 2, an electrical control box 3 fixedly connected to the left side of the inner wall of the bracket 1, a connecting frame 7 fixedly installed on the rear side of the mounting rods 2, an adjustment assembly 5 provided in the middle of the inner wall of the bracket 1, a laser welding assembly 6 provided on the left side of the bracket 1, a second limit assembly 9 provided on the left side of the laser welding assembly 6, and a first limit assembly 8 provided on the left side of the second limit assembly 9.

[0023] In this embodiment, mounting rods 2 are fixed on the front and rear sides of the top of the bracket 1, and clamping components 4 are arranged on the top of the mounting rods 2; a power control box 3 is installed on the left side of the inner wall of the bracket 1 to realize unified electrical control of the whole machine, and a connecting frame 7 is fixed on the rear side of the mounting rods 2 for auxiliary wiring protection; an adjustment component 5 is built into the middle of the bracket 1 to realize fine adjustment of the workpiece posture, and a laser welding component 6 is arranged on the left side to complete automatic welding; a second limiting component 9 and a first limiting component 8 are arranged on the left side of the laser welding component 6 in sequence. The double limiting structure realizes precise centering of the end of the I-shaped steel, and the positioning welding device is compatible with welding of multiple specifications of workpieces, reducing manual alignment deviation and tooling replacement costs.

[0024] The clamping assembly 4 includes two slide rails 405, both of which are fixedly connected to the top of the mounting rod 2. A slider 406 is slidably connected to the outer wall of the slide rail 405. A connecting plate 401 is fixedly connected to the top of the slider 406. A motor 402 is fixedly connected to the top right side of the inner wall of the connecting plate 401. A gear 403 is fixedly connected to the output end of the motor 402. A rack 404 is fixedly connected to the inner rear end of the mounting rod 2. A connecting plate 407 is fixedly connected to the top left side of the connecting plate 401. A clamping driver 409 is fixedly connected to the rear side of the connecting plate 407. A four-jaw disk 408 is fixedly connected to the inner left side of the connecting plate 407.

[0025] In this embodiment, two sets of slide rails 405 are fixed to the top surface of the mounting rod 2. The slide rails 405 are slidably fitted with sliders 406. The top of the sliders 406 is fixed with connecting plate 401. A motor 402 is mounted on the right side of the connecting plate 401. The output end of the motor 402 is connected to gear 403. A rack 404 is fixed to the rear end of the inner side of the mounting rod 2. A connecting plate 407 is provided on the left side of the connecting plate 401. A clamping driver 409 is mounted on the rear side of the connecting plate 407. A four-jaw disk 408 is mounted on the inner side. The clamping position is adjusted by the gear and rack transmission to adapt to I-shaped steel of different lengths and web thicknesses, so as to achieve flexible clamping.

[0026] Adjustment component 5 includes a connecting plate 3 501, which is fixedly connected to the middle of the inner wall of bracket 1. A motor 2 502 is fixedly connected to the bottom of the connecting plate 3 501. A drive rod 1 504 is fixedly connected to the output end of the motor 2 502. A fixed seat 503 passes through the bottom of the outer wall of the drive rod 1 504. A mounting plate 1 507 is slidably connected to the middle of the outer wall of the drive rod 1 504. Multiple sliders 2 506 are fixedly connected to the right side of the mounting plate 1 507. The inner walls of the multiple sliders 2 506 are slidably connected to... There is a slide rail 2 505. A low cylinder 511 is fixedly connected to the left front end of the mounting plate 1 507. A cylinder 508 is fixedly connected to the left rear end of the mounting plate 1 507. A connecting rod 1 509 is rotatably connected to the output end of the cylinder 508. A connecting rod 2 510 is rotatably connected to the inner wall of the connecting rod 1 509. A drive rod 2 512 is fixedly installed on the inner wall of the connecting rod 2 510. A U-shaped block 1 513 is fixedly connected to the top of the drive rod 2 512. A rotating rod 1 514 is rotatably connected to the inner wall of the U-shaped block 1 513.

[0027] In this embodiment, connecting plate three 501 is fixed to the middle of the inner wall of bracket 1. Motor two 502 is assembled at the bottom of connecting plate three 501. The output end of motor two 502 is connected to drive rod one 504. The bottom of drive rod one 504 passes through fixed seat 503. Drive rod one 504 slides on the outer wall of sliding plate one 507. Side slider two 506 of mounting plate one 507 slides smoothly along slide rail two 505. Mounting plate one 507 is equipped with cylinder 508 linked to multi-stage connecting rod and U-shaped block one 513 and rotating rod one 514, which can raise and lower, swing and adjust the height and angle of workpiece, accurately fine-tune the welding posture, save manual repeated calibration, and improve the overall welding operation efficiency.

[0028] The laser welding assembly 6 includes a mounting bracket 601, which is fixedly connected to the left side of the bracket 1. A transverse driver 602 is fixedly connected to the top left side of the mounting bracket 601. A longitudinal driver 603 is fixedly installed on the inner wall of the transverse driver 602. A laser welder 604 is fixedly installed on the left side of the longitudinal driver 603.

[0029] In this embodiment, the laser welding assembly 6 is fixed to the left side of the bracket 1 by the mounting frame 601. The top of the mounting frame 601 is horizontally equipped with a horizontal driver 602, and the horizontal driver 602 is nested inside the vertical driver 603. The laser welder 604 is fixed to the left side of the vertical driver 603. The horizontal driver 602 and the vertical driver 603 can control the laser welder 604 to move left and right and up and down respectively, completely covering the entire weld area of ​​the workpiece, realizing automated continuous laser welding, replacing manual hand welding, shortening the operation time, improving the uniformity of weld formation, and reducing the rework rate of welding defects.

[0030] Limiting component 2 9 includes mounting plate 2 901, which is fixedly connected to the bottom left side of mounting bracket 601. An adjusting plate 903 is fixedly connected to the inner wall of mounting plate 2 901. A rotary actuator 902 is fixedly connected to the inner wall of adjusting plate 903. A mounting plate 3 904 is fixedly connected to the left side of rotary actuator 902. A U-shaped block 3 905 is fixedly installed on the top left side of mounting plate 3 904. An adjusting rod 2 906 is installed on the inner wall of U-shaped block 3 905. A moving rod 2 906 is fixedly connected to the bottom of adjusting rod 2 906. Moving plate 3 907, the inner side of which is slidably connected to rack 4 912, the bottom of rack 4 912 is fixedly connected to moving plate 4 914, the top of moving plate 4 914 is rotatably connected to rotating rod 3 908, the outer side of moving plate 3 907 is fixedly connected to rack 5 913, the inner wall of mounting plate 3 904 is rotatably connected to gear 3 911 on both the front and rear sides, the left front and rear ends of mounting plate 3 904 are fixedly connected to slide rail 4 909, the outer wall of slide rail 4 909 is slidably connected to slider 4 910.

[0031] In this embodiment, the bottom of the mounting bracket 601 is fixed to the mounting plate 2 901. The mounting plate 2 901 has an internal adjustment plate 903. The adjustment plate 903 is equipped with a rotary driver 902. The output end of the rotary driver 902 is connected to the mounting plate 3 904. The top U-shaped block 3 905 of the mounting plate 3 904 is equipped with an adjustment rod 2 906, which is linked to the moving plate 3 907 and the moving plate 4 914. The gear 3 911 meshes with the rack 4 912 and the rack 5 913 to drive the slider 4 910 to slide along the slide rail 4 909, and synchronously adjusts the clamping distance of the rotating rod 3 908 to adapt to the end limit of I-shaped steel with different cross-sectional heights and flange widths.

[0032] Limiting component 8 includes mounting plate 801, which is fixedly connected to the left side of mounting plate 904. A U-shaped block 802 is fixedly installed on the front side of the inner wall of mounting plate 801. An adjusting rod 803 is installed on the inner wall of the U-shaped block 802. A movable plate 804 is fixedly connected to the rear side of the adjusting rod 803. A rack 809 is slidably connected to the inner side of the movable plate 804. A movable plate 809 is fixedly connected to the rear side of the rack 809. 11. A rotating rod 805 is rotatably connected to the front inner wall of the movable plate 2 811. A rack 3 810 is fixedly connected to the outer side of the movable plate 1 804. Gears 2 808 are rotatably connected to the inner inner wall of the mounting plate 1 801. Two slide rails 3 806 are fixedly connected to the left outer side of the mounting plate 1 801. Multiple sliders 3 807 are slidably connected to the outer walls of the two slide rails 3 806. An outer plate 812 is fixedly connected to the left side of the mounting plate 1 801.

[0033] In this embodiment, mounting plate 1 801 is fixed to the left side of mounting plate 3 904. Inside mounting plate 1 801, U-shaped block 2 802 is fitted with adjusting rod 1 803, which is connected to moving plate 1 804. The outer rack 3 810 and inner rack 2 809 of moving plate 1 804 mesh with gear 2 808, driving moving plate 2 811 and rotating rod 2 805 to slide synchronously along slide rail 3 806. Rotating rod 2 805 fits against the upper and lower flanges of I-shaped steel, forming a two-level enclosure limit with limiting component 2 9, completely constraining the spatial freedom of the workpiece end, avoiding welding misalignment and displacement deformation, and ensuring consistent quality in mass production.

[0034] Gear 403 and rack 404 are meshed together. The four-jaw disc 408 clamps the I-shaped steel workpiece. This design allows gear 403 and rack 404 to mesh with each other. When motor 402 drives gear 403 to rotate, it can drive the connecting plate 401 to move horizontally along slide rail 405, freely adjusting the overall clamping position of the clamping assembly 4. The four-jaw disc 408 inside the connecting plate 407 opens and closes synchronously under the drive of clamping driver 409. The four jaws synchronously clamp the web of the I-shaped steel, rigidly fixing the main body of the workpiece. It can accommodate I-shaped steel of different lengths and web thicknesses without the need to change special tooling fixtures.

[0035] Two slide rails 2 505 are fixedly connected to the front and rear sides of the connecting plate 3 501. The drive rod 2 512 is installed on the top of the inner wall of the low cylinder 511. This design is to fix the two sets of slide rails 2 505 symmetrically on the front and rear sides of the connecting plate 3 501, providing bidirectional guide limit for the lifting and sliding of the mounting plate 1 507, ensuring that the workpiece height adjustment process is smooth and without left or right deviation. The drive rod 2 512 is vertically mounted on the top of the inside of the low cylinder 511. The low cylinder 511 is fixed to the front end of the mounting plate 1 507. The linkage mechanism output by the cylinder 508 relies on the drive rod 2 512 as the rotation fulcrum, driving the top U-shaped block 1 513 and the rotating rod 1 514 to swing slightly, accurately adjusting the welding tilt angle of the I-beam and optimizing the welding position of the weld.

[0036] The rotary actuator 902 is rotatably connected to the left side of the inner wall of the mounting plate 2 901. The bottom of the movable plate 3 907 is rotatably connected to the rotating rod 3 908. This design allows the rotary actuator 902 to be rotatably mounted on the left side of the inner wall of the mounting plate 2 901, enabling the entire mounting plate 3 904 to rotate in all directions, adapting to the welding requirements of different workpiece butt joint angles. The bottom of the movable plate 3 907 is rotatably connected to the rotating rod 3 908. When the adjusting rod 2 906 moves the movable plate 3 907 back and forth, the rotating rod 3 908 simultaneously fits against the outer side of the I-beam flange. In conjunction with the angle adjustment of the rotary actuator 902, it achieves all-round fitting and limiting of the workpiece end, offsetting the workpiece lateral displacement and warping deformation caused by welding thermal stress.

[0037] Multiple sliders 4910 are fixedly connected to the inner walls of moving plates 3907 and 4914. Gear 3911 is meshed with rack 4912 and rack 5913. Two rotating rods 3908 fit against the I-shaped steel workpiece. This design allows multiple sets of sliders 4910 to be fixed to the inner walls of moving plates 3907 and 4914 respectively. Sliding sliders 4910 slide along slide rail 4909 to make the moving plates move smoothly without jamming. Gear 3911 meshes with rack 4912 and rack 5913 at the same time to realize synchronous opposite feeding of the upper and lower moving plates. The rotating rods 3908 at the ends of the two moving plates clamp inward and fit against the outer wall of the I-shaped steel, automatically adapting to I-shaped steel with different flange widths. There is no need for manual adjustment of the limit distance, which greatly improves the production efficiency of switching between multiple specifications.

[0038] Multiple sliders 807 are fixedly connected to the left side of the inner wall of the moving plate 804 and the moving plate 811. The gear 808 is meshed with the rack 809 and the rack 810. The two rotating rods 805 fit against the I-shaped steel workpiece. This design is to fix multiple sets of sliders 807 to the left end of the moving plate 804 and the moving plate 811. The sliders 807 slide horizontally and stably along the slide rail 806. The gear 808 meshes with the rack 809 and the rack 810 at the same time, driving the two sets of moving plates to move synchronously towards each other. The rotating rod 805 at the end of the moving plate presses against the upper and lower flanges of the I-shaped steel at the same time, forming a double-layer enclosure limit with the rotating rod 908 of the limiting component 9, completely restricting the displacement of the workpiece end and avoiding welding coaxiality deviation and misalignment defects.

[0039] Working principle: The operator hoists and places the standard and non-standard I-beams to be welded onto the bearing rail of the mounting rod 2 at the top of the bracket 1. The power control box 3 starts the motor 402. The gear 403 at the output end of the motor 402 meshes with the rack 404, driving the bottom slider 406 of the connecting plate 401 to slide horizontally along the slide rail 405. The longitudinal position of the clamping assembly 4 is automatically adjusted according to the overall length of the I-beam. After it is in place, the clamping driver 409 drives the four-jaw disk 408 to retract synchronously. The four-jaw disk 408 clamps the workpiece body from all sides of the web. For workpieces with different web thicknesses and flange widths, only the opening and closing stroke of the four-jaw disk 408 needs to be adjusted in the program to complete the clamping. There is no need to change any fixtures. It covers the entire series of I-beam specifications, saving the time of purchasing multiple sets of tooling and changing and calibrating, and solving the defects of high cost and time-consuming changeover of traditional single-specification fixtures.

[0040] After the workpiece body is clamped, the power control box 3 synchronously activates two sets of limiting mechanisms, limiting component 1 8 and limiting component 2 9, forming a double-layer enclosed positioning structure. The internal rotary driver 902 of limiting component 2 9 drives the mounting plate 3 904 to rotate to the appropriate angle. Gear 3 911 meshes with rack 4 912 and rack 5 913, driving slider 4 910 to move along slide rail 4 909. Rotating rod 3 908 fits against the left and right flanges of the I-beam. Simultaneously, the internal gear 2 808 of limiting component 1 8 meshes with rack 2 809 and rack 3 810, sliding slider 3 807 along slide rail 3 806, and rotating rod 2 805 presses against the upper and lower flanges of the I-beam. The two sets of limiting components provide full-dimensional constraint from all four sides of the workpiece end, completely restricting the workpiece's translational and rotational freedom. The thermal stress generated by the high temperature of welding is offset by the rigid clamping force, effectively suppressing flange angle deformation, workpiece side bending, and misalignment problems, reducing weld defects and subsequent straightening and rework workload, and ensuring uniform dimensional accuracy of batch workpieces.

[0041] After the double limit is completed, the adjustment component 5 in the middle of the start bracket 1 is used to finely calibrate the height and tilt angle of the workpiece. The motor 2 502 drives the drive rod 1 504 to rotate, which drives the mounting plate 1 507 to rise and fall vertically along the slide rail 2 505 via the slider 2 506, accurately adjusting the height of the I-beam weld. Then the cylinder 508 extends and pulls the connecting rod 1 509 and the connecting rod 2 510 in linkage. With the drive rod 2 512 as the fulcrum, the U-shaped block 1 513 and the rotating rod 1 514 swing slightly to finely adjust the tilt angle of the workpiece, so that the weld is in the optimal welding plane for laser welding. The entire adjustment process is completed automatically by electronic control, without the need for repeated manual prying and shim calibration, simplifying the alignment process and shortening the auxiliary operation time.

[0042] After posture calibration, the laser welding assembly 6 is activated. The horizontal driver 602 controls the vertical driver 603 to move horizontally along the length of the workpiece. The vertical driver 603 drives the laser welder 604 to finely adjust the height of the welding torch. The laser welder 604 moves at a constant speed along the butt weld of the I-beam to complete continuous welding. Throughout the welding process, the workpiece is always rigidly fixed by the clamping assembly 4 and the double limiting assembly, preventing any deviation or shaking. The weld is uniform and aesthetically pleasing. After welding, the equipment automatically resets, and the four-jaw plate 408, rotating rod 2 805, and rotating rod 3 908 are released simultaneously, allowing the operator to unload the material directly. The entire process is automated, eliminating manual support and welding steps, improving welding efficiency, and adapting to the industrialized batch welding production rhythm of factories.

[0043] All actions of the entire device are controlled by the power control box 3 in a unified manner, and the clamping, limiting, fine-tuning and welding processes are seamlessly connected, which improves the adaptability of tooling, the quality of welding, and the efficiency of production automation.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A clamping, positioning, and welding device for multi-specification I-beams, comprising a bracket (1), characterized in that: Mounting rods (2) are fixedly connected to the top front and rear sides of the bracket (1). A clamping assembly (4) is provided on the top of the mounting rod (2). A power control box (3) is fixedly connected to the left side of the inner wall of the bracket (1). A connecting frame (7) is fixedly installed on the rear side of the mounting rod (2). An adjustment assembly (5) is provided in the middle of the inner wall of the bracket (1). A laser welding assembly (6) is provided on the left side of the bracket (1). A second limit assembly (9) is provided on the left side of the laser welding assembly (6). A first limit assembly (8) is provided on the left side of the second limit assembly (9). The clamping assembly (4) includes two slide rails (405), both of which are fixedly connected to the top of the mounting rod (2). A slider (406) is slidably connected to the outer wall of the slide rail (405). A connecting plate (401) is fixedly connected to the top of the slider (406). A motor (402) is fixedly connected to the top right side of the inner wall of the connecting plate (401). A gear (403) is fixedly connected to the output end of the motor (402). A rack (404) is fixedly connected to the inner rear end of the mounting rod (2). A connecting plate (407) is fixedly connected to the top left side of the connecting plate (401). A clamping driver (409) is fixedly connected to the rear side of the connecting plate (407). A four-jaw disk (408) is fixedly connected to the inner left side of the connecting plate (407).

2. The multi-specification I-beam clamping, positioning, and welding device according to claim 1, characterized in that: The adjustment assembly (5) includes a connecting plate three (501), which is fixedly connected to the middle of the inner wall of the bracket (1). A motor two (502) is fixedly connected to the bottom of the connecting plate three (501). A drive rod one (504) is fixedly connected to the output end of the motor two (502). A fixed seat (503) passes through the bottom of the outer wall of the drive rod one (504). An mounting plate one (507) is slidably connected to the middle of the outer wall of the drive rod one (504). A plurality of slider two (506) is fixedly connected to the right side of the mounting plate one (507). The inner walls of the plurality of slider two (506) are slidably connected. A slide rail 2 (505) is connected to a low cylinder (511) fixedly connected to the left front end of the mounting plate 1 (507). A cylinder (508) is fixedly connected to the left rear end of the mounting plate 1 (507). A connecting rod 1 (509) is rotatably connected to the output end of the cylinder (508). A connecting rod 2 (510) is rotatably connected to the inner wall of the connecting rod 1 (509). A driving rod 2 (512) is fixedly installed on the inner wall of the connecting rod 2 (510). A U-shaped block 1 (513) is fixedly connected to the top of the driving rod 2 (512). A rotating rod 1 (514) is rotatably connected to the inner wall of the U-shaped block 1 (513).

3. The multi-specification I-beam clamping, positioning, and welding device according to claim 1, characterized in that: The laser welding assembly (6) includes a mounting bracket (601), which is fixedly connected to the left side of the bracket (1). A transverse driver (602) is fixedly connected to the top left side of the mounting bracket (601), and a longitudinal driver (603) is fixedly installed on the inner wall of the transverse driver (602). A laser welder (604) is fixedly installed on the left side of the longitudinal driver (603).

4. The multi-specification I-beam clamping, positioning, and welding device according to claim 3, characterized in that: The limiting component two (9) includes a mounting plate two (901), which is fixedly connected to the bottom left side of the mounting bracket (601). An adjusting plate (903) is fixedly connected to the inner wall of the mounting plate two (901), and a rotary driver (902) is fixedly connected to the inner wall of the adjusting plate (903). A mounting plate three (904) is fixedly connected to the left side of the rotary driver (902). A U-shaped block three (905) is fixedly installed on the top left side of the mounting plate three (904). An adjusting rod two (906) is installed on the inner wall of the U-shaped block three (905), and a... The movable plate three (907) is slidably connected to the inner side of the movable plate three (907) and the rack four (912) is fixedly connected to the bottom of the rack four (912) and the rotating rod three (908) is rotatably connected to the top of the movable plate four (914). The rack five (913) is fixedly connected to the outer side of the movable plate three (907). The inner wall of the mounting plate three (904) is rotatably connected to the front and rear sides of the inner wall of the mounting plate three (904). The left front and rear ends of the mounting plate three (904) are fixedly connected to the slide rail four (909) and the outer wall of the slide rail four (909) is slidably connected to the slider four (910).

5. The multi-specification I-beam clamping, positioning, and welding device according to claim 4, characterized in that: The limiting component 1 (8) includes a mounting plate 1 (801), which is fixedly connected to the left side of the mounting plate 3 (904). A U-shaped block 2 (802) is fixedly installed on the front side of the inner wall of the mounting plate 1 (801). An adjusting rod 1 (803) is installed on the inner wall of the U-shaped block 2 (802). A movable plate 1 (804) is fixedly connected to the rear side of the adjusting rod 1 (803). A rack 2 (809) is slidably connected to the inner side of the movable plate 1 (804). A movable plate 2 is fixedly connected to the rear side of the rack 2 (809). (811) A rotating rod (805) is rotatably connected to the front side of the inner wall of the second movable plate (811). A rack (810) is fixedly connected to the outer side of the first movable plate (804). A gear (808) is rotatably connected to the inner side of the inner wall of the first mounting plate (801). Two slide rails (806) are fixedly connected to the left side of the first mounting plate (801). Multiple sliders (807) are slidably connected to the outer walls of the two slide rails (806). An outer plate (812) is fixedly connected to the left side of the first mounting plate (801).

6. The multi-specification I-beam clamping, positioning, and welding device according to claim 1, characterized in that: The gear (403) and rack (404) are meshed together, and the four-jaw disc (408) clamps the I-shaped steel workpiece.

7. The multi-specification I-beam clamping, positioning, and welding device according to claim 2, characterized in that: The two slide rails (505) are fixedly connected to the front and rear sides of the connecting plate (501), and the drive rod (512) is installed on the top of the inner wall of the low cylinder (511).

8. The multi-specification I-beam clamping, positioning, and welding device according to claim 4, characterized in that: The rotary driver (902) is rotatably connected to the left side of the inner wall of the mounting plate two (901), and the bottom of the movable plate three (907) is rotatably connected to the rotating rod three (908).

9. A multi-specification I-beam clamping, positioning, and welding device according to claim 4, characterized in that: Multiple sliders four (910) are fixedly connected to the inner walls of movable plate three (907) and movable plate four (914). Gear three (911) is meshed with rack four (912) and rack five (913). Two rotating rods three (908) fit against the I-shaped steel workpiece.

10. A multi-specification I-beam clamping, positioning, and welding device according to claim 5, characterized in that: Multiple sliders (807) are fixedly connected to the left side of the inner wall of movable plate 1 (804) and movable plate 2 (811). Gear 2 (808) is meshed with rack 2 (809) and rack 3 (810). Two rotating rods (805) fit against the I-shaped steel workpiece.

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