A welding device for prefabricated steel components of bridges

Abstract

This invention discloses a welding device for precast steel components of bridges, relating to the field of welding technology. It includes a welding table and a component body. A drive cylinder is fixedly installed on the top of the welding table, and the component body is placed on the bottom inner wall of the welding table. Clamping plates are symmetrically arranged on the bottom inner wall of the welding table corresponding to the component body. This invention employs multiple coordination methods to ensure quality when welding H-beams: a drive motor moves the welding torch, and a sliding housing and spring work together to move the welding torch vertically to the web, avoiding uneven weld penetration; the sliding housing and clamping plates, along with the transmission gear and rack, work together to allow the welding torch to rotate to adapt to the right-angle bevel, solving the risk of incomplete fusion at the root of the "U"-shaped weld; a ball bearing and a corrugated groove work together to make the welding torch oscillate back and forth, expanding the weld width of the vertical weld section and compensating for the inclination angle of the rotating weld section; a push-pull rod and sliding cylinder work together to move the air pipe through a connecting seat, removing splicing impurities and avoiding slag inclusions. These multiple measures improve welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding technology, specifically to a welding device for prefabricated steel components for bridges. Background Technology

[0002] Steel structures are structures made of steel materials and are one of the main types of building structures. The structure mainly consists of steel beams, steel columns, steel trusses, and other components made of shaped steel and steel plates, and employs rust removal and prevention processes such as silanization, pure manganese phosphating, water washing and drying, and galvanizing. The various components or parts are typically connected by welds, bolts, or rivets. Due to their light weight and simple construction, they are widely used in large factories, stadiums, high-rise buildings, bridges, and other fields. Steel structures are prone to corrosion, and generally require rust removal, galvanizing, or painting, as well as regular maintenance.

[0003] Chinese patent CN116493837B discloses a welding robot for H-beams in steel structures. This patented technology enables the H-beam to automatically turn to the other side when the movable seat moves from the middle to one side during welding, as the protrusion contacts another movable frame. This ensures that the real-time welding position is always directly below the welding torch. The welding torch can be extended and retracted by simply driving the electric push rod. This device can also automatically adjust the angle between the welding torch and the H-beam during welding.

[0004] However, the following problems still exist in the implementation of this patented technology:

[0005] In this patented technology, when welding the joint of two H-beams, in order to automate the welding of the junction between the web and flange of the H-beam, the starting point is the middle of the H-beam. When moving to any side, one side of the H-beam is lowered accordingly for adaptation. Since the welding torch tip is always vertically downward, in this patent, the H-beam has already flipped before reaching the corner. This results in inclined welding at the joint between the web and the flange of the two H-beams before reaching the flange. Under the impact of gravity and arc force, the molten metal in the pool flows to the lower side of the incline, making it impossible to weld the web evenly and making it difficult to perform targeted welding, thus affecting the overall welding quality of the H-beam. Summary of the Invention

[0006] The purpose of this invention is to provide a welding device for prefabricated steel components for bridges to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a welding device for precast steel components of bridges, comprising a welding table and a component body, wherein a driving cylinder is fixedly installed on the top of the welding table, the component body is placed on the bottom inner wall of the welding table, and clamping plates are symmetrically arranged on the bottom inner wall of the welding table corresponding to the component body.

[0008] The output end of the drive cylinder is equipped with segmented welding components, which enable vertical welding and rotary welding under different working conditions during the welding process, ensuring that the gravity of the molten pool and the arc force are coaxial, and specifically solving the risk of incomplete fusion at the root of the "U" shaped weld.

[0009] The welding table is equipped with a movable oscillating welding component, which can continuously perform reciprocating oscillation welding during the welding process. The oscillation in the vertical welding section expands the weld width, and the oscillation in the rotating welding section compensates for the change in inclination angle, ensuring that the corner weld pool at the junction of the web and the flange fully wets the sharp corner of the flange bevel.

[0010] The inner wall of the welding station is equipped with an air-blowing cleaning component, which can thoroughly remove impurities and other residues at the splicing position of the H-beams during the welding process, and prevent impurities from carbonizing and forming slag inclusions during subsequent welding.

[0011] Preferably, the segmented welding component includes a bracket, one end of the output rod of the drive cylinder is fixedly connected to the top of the bracket, two inner walls of the bracket are rotatably connected to a helical rod, one outer wall of the bracket is fixedly mounted with a drive motor, one output shaft of the drive motor is fixedly connected to one end of the helical rod, the outer wall of the helical rod is threadedly connected to a movable seat, the top of the movable seat slides against the inner wall of the top of the bracket, the bottom of the movable seat is fitted with a connecting seat, and the interior of the connecting seat is slidably connected to a sliding shell, the side wall of the connecting seat is provided with a sliding groove corresponding to the sliding shell, and the upper outer wall of the sliding shell slides against the inner wall of the sliding groove.

[0012] Preferably, the sliding shell has an inner groove extending through its front and rear side walls. The bottom of the connecting seat slides against the inner wall of the inner groove. Springs are symmetrically fixed to the inner wall of the inner groove. The ends of the two springs that are close to each other are fixedly connected to the outer walls of the two sides of the connecting seat. A mounting bracket is fixedly connected to the bottom of the sliding shell. Rotating rods are rotatably connected to the two sides of the mounting bracket. A mounting block is fixedly connected to the outer wall of the middle part of the rotating rod. A welding torch is fixedly installed at the bottom of the mounting block.

[0013] Preferably, the two ends of the rotating rod are fixedly connected to a transmission gear, and the bottom of the transmission gear is meshed with a rack. The outer walls of the two racks on opposite sides are symmetrically fixedly connected to a fixing strip, and the top of the fixing strip is fixedly connected to the bottom of the connecting seat.

[0014] Preferably, the movable sway welding component includes a slider, and the bottom of the slider is fixedly connected to the top of the connecting seat. The bottom of the movable seat is provided with a limiting groove corresponding to the slider, and the outer wall of the slider slides in contact with the inner wall of the limiting groove. The slider is T-shaped. The top of the connecting seat is symmetrically fixedly connected with fixing rods. The two fixing rods are fixedly connected to a connecting rod at their close ends, and ball bearings are fixedly connected to the two connecting rods at their close ends.

[0015] Preferably, the front and rear side walls of the bracket are provided with wave grooves corresponding to the ball bearings, and the connecting rod is slidably connected to the inner wall of the wave grooves through the ball bearings.

[0016] Preferably, the air-blowing cleaning welding component includes a mounting plate, one end of which is fixedly connected to the rear outer wall of the connecting seat. A push-pull rod is slidably connected to the bottom of the mounting plate, and a sliding cylinder is slidably connected to the outer wall of the push-pull rod. Support plates are fixedly connected to the inner walls of both sides of the welding table corresponding to the sliding cylinder, and a limiting groove is opened through the top of the support plate corresponding to the sliding cylinder. The bottom outer wall of the sliding cylinder is slidably connected to the inner wall of the limiting groove.

[0017] Preferably, an air blowing pipe is fixedly connected to the bottom of the sliding cylinder, and the inner wall of the air blowing pipe is connected to the inner wall of the sliding cylinder.

[0018] Preferably, another drive cylinder is symmetrically installed on the outer walls of both sides of the welding station corresponding to the clamping plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. When welding H-beams, the welding torch can be moved from one side of the H-beam to the other by a drive motor. Through the cooperation of the sliding shell and spring, the welding torch can be kept perpendicular to the web plate during the welding path. Vertical welding ensures that the gravity of the molten pool and the arc force are coaxial, avoiding uneven weld depth caused by lateral flow of the molten pool. At the same time, through the cooperation of the sliding shell and the clamping plate, the movement of the welding torch can be restricted when it reaches the junction of the web plate and the flange plate. Through the cooperation of the transmission gear and rack, the stationary welding torch can be rotated to adapt to the right angle bevel. This specifically solves the risk of incomplete fusion at the root of the "U" shaped weld, thus helping to ensure the overall welding quality of the H-beam.

[0021] 2. When welding H-beams, the combination of ball bearings and corrugated grooves allows the welding torch to continuously oscillate throughout the welding process. On the one hand, the oscillation in the vertical weld section widens the weld width, better covering the heat-affected zone of the web and preventing incomplete fusion on the sidewalls of narrow, straight weld beads. On the other hand, the oscillation in the rotating weld section compensates for changes in the welding torch angle, ensuring that the weld pool at the corner where the web and flange meet fully wets the sharp corner of the flange bevel, thus helping to guarantee the overall welding quality of the H-beams.

[0022] 3. When welding H-beams, the push-pull rod and sliding cylinder can work together to move the air pipe from one side of the H-beam to the other before the welding is completed. This allows for the thorough removal of any remaining impurities at the joint, preventing carbonization and slag inclusions during subsequent welding and thus helping to ensure the overall welding quality of the H-beams. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall rear structure of the present invention;

[0025] Figure 3 This is a side view of the overall structure of the present invention;

[0026] Figure 4 This is a schematic diagram showing the connection relationship between the connecting seat and the sliding shell of the present invention;

[0027] Figure 5 This is a schematic diagram of the transmission relationship between the rotating rod and the rack of the present invention;

[0028] Figure 6 This is a schematic diagram illustrating the kinematic relationship between the fixed rod and the wave groove of the present invention.

[0029] Figure 7 This is a schematic diagram showing the installation relationship between the sliding cylinder and the support plate of the present invention.

[0030] In the diagram: 1. Welding table; 2. Drive cylinder; 3. Main component; 4. Clamping plate; 5. Segmented welding component; 501. Bracket; 502. Helical rod; 503. Drive motor; 504. Moving seat; 505. Connecting seat; 506. Sliding shell; 507. Slide groove; 508. Inner groove; 509. Spring; 510. Mounting bracket; 511. Rotating rod; 512. Mounting block; 513. Welding torch; 514. Transmission gear; 515. Rack; 516. Fixing strip; 6. Moving oscillating welding component; 601. Slider; 602. Limiting groove; 603. Fixing rod; 604. Connecting rod; 605. Ball bearing; 606. Wave groove; 7. Air blowing and cleaning welding component; 701. Mounting plate; 702. Push-pull rod; 703. Sliding cylinder; 704. Support plate; 705. Limiting groove; 706. Air blowing pipe. Detailed Implementation

[0031] 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.

[0032] Example 1, please refer to Figures 1-7 The present invention provides a welding device for prefabricated steel components of bridges, including a welding table 1 and a component body 3. A driving cylinder 2 is fixedly installed on the top of the welding table 1, and the component body 3 is placed on the bottom inner wall of the welding table 1. Clamping plates 4 are symmetrically arranged on the bottom inner wall of the welding table 1 corresponding to the component body 3.

[0033] The output end of the drive cylinder 2 is provided with a segmented welded component 5;

[0034] Furthermore, the segmented welding component 5 includes a bracket 501, one end of the output rod of the drive cylinder 2 is fixedly connected to the top of the bracket 501, the inner walls of both sides of the bracket 501 are rotatably connected to a spiral rod 502, one side of the outer wall of the bracket 501 is fixedly installed with a drive motor 503, and one end of the output shaft of the drive motor 503 is fixedly connected to one end of the spiral rod 502, the outer wall of the spiral rod 502 is threadedly connected to a movable seat 504, and the top of the movable seat 504 slides against the inner wall of the top of the bracket 501, the bottom of the movable seat 504 is fitted with a connecting seat 505, and the inside of the connecting seat 505 is slidably connected to a sliding shell 506, the side wall of the connecting seat 505 is provided with a sliding groove 507 through the sliding shell 506, and the upper outer wall of the sliding shell 506 slides against the inner wall of the sliding groove 507.

[0035] More specifically, in the embodiment, when welding the H-beams end to end, the two H-beams are first placed end to end on the bottom inner wall of the welding table 1, and then another drive cylinder 2 is symmetrically installed on the two outer walls of the welding table 1 corresponding to the clamping plates 4, so that the two clamping plates 4 can be driven by the drive cylinder 2 to clamp and fix the H-beams.

[0036] Then, the segmented welding component 5 includes a bracket 501. One end of the output rod of the drive cylinder 2 is fixedly connected to the top of the bracket 501. The inner walls on both sides of the bracket 501 are rotatably connected to a spiral rod 502. A drive motor 503 is fixedly installed on one side of the outer wall of the bracket 501, and one end of the output shaft of the drive motor 503 is fixedly connected to one end of the spiral rod 502. The outer wall of the spiral rod 502 is threadedly connected to a movable seat 504. Thus, the drive cylinder 2 can drive the bracket 501 to descend, thereby driving the subsequent welding torch 513 to descend to a suitable welding height. Then, through the setting of the drive motor 503, the forward and reverse rotation of the spiral rod 502 can drive the movable seat 504 to move left and right, thereby driving the subsequent welding torch 513 to move left and right for welding.

[0037] Next, the top of the movable seat 504 slides against the inner wall of the top of the bracket 501. A connecting seat 505 is fitted to the bottom of the movable seat 504, and a sliding shell 506 is slidably connected inside the connecting seat 505. A sliding groove 507 is formed through the side wall of the connecting seat 505 corresponding to the sliding shell 506, and the upper outer wall of the sliding shell 506 slides against the inner wall of the sliding groove 507. Inner grooves 508 are formed through the front and rear side walls of the sliding shell 506, and the bottom of the connecting seat 505 slides against the inner wall of the inner groove 508. Springs 509 are symmetrically fixed to the inner wall of the inner groove 508, and the ends of the two springs 509 that are close to each other are fixedly connected to the connecting seat 505. The sliding shell 506 has a mounting bracket 510 fixedly connected to the bottom of its two outer walls. The mounting bracket 510 has a rotating rod 511 rotatably connected to the inside of its two sides. The middle outer wall of the rotating rod 511 has a mounting block 512 fixedly connected to it. The bottom of the mounting block 512 has a welding torch 513 fixedly installed. Under normal conditions, the sliding shell 506 is positioned in the middle of the connecting seat 505 by the elastic force of the spring 509. At this time, the welding torch 513 is facing vertically downwards. This ensures that the welding torch 513 moves vertically to the web plate along the welding path. Vertical welding ensures that the gravity of the molten pool and the arc force are coaxial, avoiding uneven melting depth caused by lateral flow of the molten pool.

[0038] Next, when the welding torch 513 reaches the junction of the web and the flange, the sliding shell 506 is restricted by the clamping plate 4. That is, when the connecting seat 505 moves to one side until the sliding shell 506 contacts the clamping plate 4, it means that the welding torch 513 has reached the junction of the web and the flange. With the restriction of the sliding shell 506 by the clamping plate 4, the welding torch 513 can no longer follow the connecting seat 505. At this time, as the moving seat 504 continues to move, it can drive the connecting seat 505 to compress the spring 509 on one side of the inner groove 508 and continue to move. At this time, the two ends of the rotating rod 511 A transmission gear 514 is fixedly connected to the part, and a rack 515 is meshed with the bottom of the transmission gear 514. Fixing bars 516 are symmetrically fixedly connected to the outer walls of the two racks 515 on the side away from each other, and the top of the fixing bars 516 is fixedly connected to the bottom of the connecting seat 505. This allows the connecting seat 505 to drive the transmission gear 514 to rotate through the rack 515, and then drive the welding torch 513 to rotate through the rotating rod 511. This enables the welding torch 513, which is stationary, to rotate to adapt to the right angle bevel, specifically solving the risk of incomplete fusion at the root of the "U" shaped weld, thereby helping to ensure the overall welding quality of the H-beam.

[0039] Furthermore, the position of the clamping plate 4 after clamping H-beams of different specifications will be used to position the stop position of the welding torch 513. Thus, when the connecting seat 505 moves to one side until the sliding shell 506 contacts the clamping plate 4, it will represent that the welding torch 513 has reached the junction of the web and the flange.

[0040] Example 2: Based on the above examples, the welding table 1 is equipped with a movable oscillating welding component 6 inside;

[0041] Furthermore, the movable sway welding component 6 includes a slider 601, and the bottom of the slider 601 is fixedly connected to the top of the connecting seat 505. The bottom of the movable seat 504 is provided with a limiting groove 602 corresponding to the slider 601, and the outer wall of the slider 601 slides in contact with the inner wall of the limiting groove 602. The slider 601 is T-shaped. The top of the connecting seat 505 is symmetrically fixedly connected with fixing rods 603. The ends of the two fixing rods 603 that are close to each other are fixedly connected with connecting rods 604. The ends of the two connecting rods 604 that are close to each other are fixedly connected with balls 605.

[0042] More specifically, in the embodiment, when welding H-beams, the movable welding component 6 includes a slider 601, and the bottom of the slider 601 is fixedly connected to the top of the connecting seat 505. The bottom of the movable seat 504 is provided with a limiting groove 602 corresponding to the slider 601, and the outer wall of the slider 601 slides in contact with the inner wall of the limiting groove 602. The slider 601 is T-shaped, so that when the movable seat 504 drives the connecting seat 505 to move left and right, the connecting seat 505 can move freely back and forth through the cooperation of the slider 601 and the limiting groove 602.

[0043] Next, a fixing rod 603 is symmetrically fixedly connected to the top of the connecting seat 505. A connecting rod 604 is fixedly connected to one end of the two fixing rods 603 that are close to each other. A ball bearing 605 is fixedly connected to one end of the two connecting rods 604 that are close to each other. Corrugated grooves 606 are opened on the front and rear side walls of the bracket 501 corresponding to the ball bearings 605. The connecting rod 604 is slidably connected to the inner wall of the corrugated groove 606 through the ball bearings 605. Thus, through the cooperation of the ball bearings 605 and the corrugated groove 606, the welding torch 513 is continuously driven to oscillate back and forth throughout the welding process. On the one hand, the oscillation in the vertical welding section expands the weld width and better covers the heat-affected zone of the web, avoiding the situation of incomplete fusion on the side wall of the narrow straight weld bead. On the other hand, the oscillation in the rotating welding section compensates for the change in the tilt angle of the welding torch 513, ensuring that the corner weld pool at the junction of the web and the flange fully wets the sharp corner of the flange bevel, thereby helping to ensure the overall welding quality of the H-beam.

[0044] Example 3: Based on the above examples, the inner wall of the welding station 1 is provided with an air-blowing cleaning component 7;

[0045] Furthermore, the air-blowing cleaning welding component 7 includes a mounting plate 701, one end of which is fixedly connected to the rear outer wall of the connecting seat 505. A push-pull rod 702 is slidably connected to the bottom of the mounting plate 701, and a sliding cylinder 703 is slidably connected to the outer wall of the push-pull rod 702. Support plates 704 are fixedly connected to the inner walls of both sides of the welding table 1 corresponding to the sliding cylinder 703. A limiting groove 705 is opened through the top of the support plate 704 corresponding to the sliding cylinder 703. The bottom outer wall of the sliding cylinder 703 is slidably connected to the inner wall of the limiting groove 705.

[0046] More specifically, in the embodiment, before welding the H-beam, under normal circumstances, the H-beam is clamped first. After clamping, the moving seat 504 should be located at the upper left or upper right position. At this time, through the cooperation of the drive motor 503 and the drive cylinder 2, the moving seat 504 is tilted from the upper left or upper right to the lower right or lower left position, that is, from a high position on one side to a low position on the other side. After moving to the lower position, the welding torch 513 will be in a rotating welding state. Then it will move horizontally from this side to the other side to complete the complete welding of one side of the weld seam on the surface of the H-beam.

[0047] Next, one end of the mounting plate 701 is fixedly connected to the rear outer wall of the connecting seat 505. A push-pull rod 702 is slidably connected to the bottom of the mounting plate 701, and a sliding cylinder 703 is slidably connected to the outer wall of the push-pull rod 702. Support plates 704 are fixedly connected to the inner walls of both sides of the welding table 1 corresponding to the sliding cylinder 703. A limiting groove 705 is opened through the top of the support plate 704 corresponding to the sliding cylinder 703. The bottom outer wall of the sliding cylinder 703 is slidably connected to the inner wall of the limiting groove 705. An air blower is fixedly connected to the bottom of the sliding cylinder 703. The air blowing pipe 706 is connected to the inner wall of the sliding cylinder 703, so that the air blowing pipe 706 can be moved from one side of the weld to the other side of the weld by using the connecting seat 505. During this process, the air in the sliding cylinder 703 is squeezed and pushed by the push-pull rod 702, thereby achieving a complete removal of impurities and other residues at the splicing position, avoiding the formation of slag inclusions by carbonization of impurities during subsequent welding, thus helping to ensure the overall welding quality of the H-beam.

[0048] Furthermore, a push-pull rod 702 is slidably connected to the bottom of the mounting plate 701, so that the back-and-forth swing of the connecting seat 505 does not affect the lifting and lowering movement of the push-pull rod 702.

[0049] Working principle: When welding the ends of H-beams, the ends of two H-beams are first placed together on the bottom inner wall of the welding table 1. Then, another drive cylinder 2 is symmetrically installed on the outer walls of the welding table 1, corresponding to the clamping plates 4. The drive cylinder 2 can drive the two clamping plates 4 to clamp and fix the H-beams.

[0050] The support 501 is lowered by the drive cylinder 2, so that the welding torch 513 is lowered to a suitable welding height. Then, by setting the drive motor 503, the forward and reverse rotation of the screw rod 502 can drive the moving seat 504 to move left and right, which in turn can drive the welding torch 513 to move left and right for welding.

[0051] Then, under normal conditions, the spring force of the spring 509 is used to make the sliding shell 506 located in the middle position of the connecting seat 505. At this time, the welding torch 513 is facing vertically downward, so that the welding torch 513 can be kept perpendicular to the web plate in the welding path. Vertical welding ensures that the gravity of the molten pool and the arc force are coaxial, avoiding uneven melting depth caused by lateral flow of the molten pool.

[0052] When the welding torch 513 reaches the junction of the web and the flange, the sliding shell 506 is restricted by the clamping plate 4. That is, when the connecting seat 505 moves to one side until the sliding shell 506 contacts the clamping plate 4, it means that the welding torch 513 has reached the junction of the web and the flange. With the restriction of the sliding shell 506 by the clamping plate 4, the welding torch 513 can no longer follow the connecting seat 505. As the moving seat 504 continues to move, it can drive the connecting seat 505 to squeeze the spring 509 on one side of the inner groove 508 and continue to move. At this time, the connecting seat 505 can drive the transmission gear 514 to rotate through the rack 515, and then drive the welding torch 513 to rotate through the rotating rod 511. This realizes the rotation of the stopped welding torch 513 to adapt to the right angle bevel, which specifically solves the risk of incomplete fusion at the root of the "U" shaped weld, thus helping to ensure the overall welding quality of the H-beam.

[0053] Next, through the cooperation of the ball bearing 605 and the corrugated groove 606, the welding torch 513 is continuously driven to oscillate back and forth throughout the welding process. On the one hand, the oscillation in the vertical welding section expands the weld width, better covers the heat-affected zone of the web, and avoids the side wall of the narrow straight weld bead from being incompletely fused. On the other hand, the oscillation in the rotating welding section compensates for the change in the tilt angle of the welding torch 513, ensuring that the corner weld pool at the junction of the web and the flange fully wets the sharp corner of the flange bevel, thereby helping to ensure the overall welding quality of the H-beam.

[0054] Before welding the H-beam, under normal circumstances, the H-beam is clamped first. After clamping, the moving seat 504 should be in the upper left or upper right position. At this time, through the cooperation of the drive motor 503 and the drive cylinder 2, the moving seat 504 is tilted from the upper left or upper right to the lower right or lower left position, that is, from a high position on one side to a low position on the other side. After moving to the lower position, the welding torch 513 will be in the rotating welding state. Then it will move horizontally from this side to the other side to complete the complete welding of one side of the weld seam on the surface of the H-beam.

[0055] Next, one end of the mounting plate 701 is fixedly connected to the rear outer wall of the connecting seat 505. A push-pull rod 702 is slidably connected to the bottom of the mounting plate 701, and a sliding cylinder 703 is slidably connected to the outer wall of the push-pull rod 702. Support plates 704 are fixedly connected to the inner walls of both sides of the welding table 1 corresponding to the sliding cylinder 703. A limiting groove 705 is opened through the top of the support plate 704 corresponding to the sliding cylinder 703. The bottom outer wall of the sliding cylinder 703 is slidably connected to the inner wall of the limiting groove 705. An air blower is fixedly connected to the bottom of the sliding cylinder 703. The air blowing pipe 706 is connected to the inner wall of the sliding cylinder 703. The air blowing pipe 706 can be moved from one side to the other side by the connecting seat 505. During this process, the air in the sliding cylinder 703 is squeezed and pushed by the push-pull rod 702, thereby completely removing the impurities remaining at the splicing position and avoiding the formation of slag inclusions by carbonization of impurities during subsequent welding. This helps to ensure the overall welding quality of the H-beam.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding device for precast steel components of bridges, comprising a welding table (1) and a component body (3), characterized in that: A drive cylinder (2) is fixedly installed on the top of the welding table (1), and the main body of the component (3) is placed on the bottom inner wall of the welding table (1). Clamping plates (4) are symmetrically arranged on the bottom inner wall of the welding table (1) corresponding to the main body of the component (3). The output end of the drive cylinder (2) is provided with a segmented welded component (5); The welding table (1) is equipped with a movable oscillating welding component (6) to continuously perform reciprocating oscillating welding. The oscillation in the vertical welding section expands the weld width, and the oscillation in the rotating welding section compensates for the change in inclination angle, ensuring that the corner weld pool at the junction of the web and the flange fully wets the flange bevel. The inner wall of the welding table (1) is provided with an air-blowing cleaning component (7) to remove the impurities remaining at the splicing position of the H-beam in advance, so as to avoid the impurities from carbonizing and forming slag inclusions during welding. The segmented welding component (5) includes a bracket (501). One end of the output rod of the drive cylinder (2) is fixedly connected to the top of the bracket (501). A helical rod (502) is rotatably connected to the inner walls of both sides of the bracket (501). A drive motor (503) is fixedly installed on one outer wall of the bracket (501), and one end of the output shaft of the drive motor (503) is fixedly connected to one end of the helical rod (502). The outer wall of the helical rod (502) is threaded. A movable seat (504) is connected, and the top of the movable seat (504) slides against the inner wall of the top of the bracket (501). A connecting seat (505) is attached to the bottom of the movable seat (504), and a sliding shell (506) is slidably connected inside the connecting seat (505). A sliding groove (507) is opened through the side wall of the connecting seat (505) corresponding to the sliding shell (506), and the upper outer wall of the sliding shell (506) slides against the inner wall of the sliding groove (507). The sliding shell (506) has an inner groove (508) extending through its front and rear side walls. The bottom of the connecting seat (505) slides against the inner wall of the inner groove (508). Springs (509) are symmetrically fixedly connected to the inner wall of the inner groove (508). The ends of the two springs (509) that are close to each other are fixedly connected to the outer walls of the two sides of the connecting seat (505). A mounting bracket (510) is fixedly connected to the bottom of the sliding shell (506). Rotating rods (511) are rotatably connected to the two sides of the mounting bracket (510). A mounting block (512) is fixedly connected to the outer wall of the middle part of the rotating rod (511). A welding torch (513) is fixedly installed at the bottom of the mounting block (512). The two ends of the rotating rod (511) are fixedly connected to the transmission gear (514), and the bottom of the transmission gear (514) is meshed with the rack (515). The outer walls of the two racks (515) on opposite sides are symmetrically fixedly connected to the fixing strip (516), and the top of the fixing strip (516) is fixedly connected to the bottom of the connecting seat (505).

2. The welding device for prefabricated steel components of a bridge according to claim 1, characterized in that, The movable sway welding component (6) includes a slider (601), and the bottom of the slider (601) is fixedly connected to the top of the connecting seat (505). The bottom of the movable seat (504) is provided with a limiting groove (602) corresponding to the slider (601), and the outer wall of the slider (601) slides in contact with the inner wall of the limiting groove (602). The slider (601) is T-shaped. The top of the connecting seat (505) is symmetrically fixedly connected with fixing rods (603). The two fixing rods (603) are fixedly connected to a connecting rod (604) at one end close to each other. The two connecting rods (604) are fixedly connected to a ball bearing (605) at one end close to each other.

3. The welding device for prefabricated steel components of bridges according to claim 2, characterized in that, The front and rear side walls of the bracket (501) are provided with wave grooves (606) corresponding to the ball (605), and the connecting rod (604) is slidably connected to the inner wall of the wave groove (606) through the ball (605).

4. The welding device for prefabricated steel components of bridges according to claim 3, characterized in that, The air-blowing cleaning welding component (7) includes a mounting plate (701), and one end of the mounting plate (701) is fixedly connected to the rear outer wall of the connecting seat (505). A push-pull rod (702) is slidably connected to the bottom of the mounting plate (701), and a sliding cylinder (703) is slidably connected to the outer wall of the push-pull rod (702). A support plate (704) is fixedly connected to the inner walls of both sides of the welding table (1) corresponding to the sliding cylinder (703), and a limiting groove (705) is opened through the top of the support plate (704) corresponding to the sliding cylinder (703). The bottom outer wall of the sliding cylinder (703) is slidably connected to the inner wall of the limiting groove (705).

5. The welding device for precast bridge steel structure components according to claim 4, characterized in that, The bottom of the sliding cylinder (703) is fixedly connected to an air blowing pipe (706), and the inner wall of the air blowing pipe (706) is connected to the inner wall of the sliding cylinder (703).

6. The welding device for prefabricated steel components of bridges according to claim 1, characterized in that, Another drive cylinder (2) is symmetrically installed on the outer walls of both sides of the welding table (1) corresponding to the clamping plate (4).

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