A precise butt welding equipment for large metal structural parts

Abstract

The application discloses a kind of precision butt welding equipment for large metal structural parts, and relates to the technical field of metal structural part welding processing equipment, including base and angle adjusting assembly.The precision butt welding equipment for large metal structural parts, the mechanical engagement of the present device with angle adjusting assembly is meshed, the automatic adjustment and precision reset of the welding angle of the secondary pipe are realized, the tooth shape of the front end of Z-shaped rack along the feeding direction of moving support plate is first meshed with steering gear one or steering gear two, drives the deflection of center shaft and material guide plate to match the preset welding angle of the axis of secondary pipe and main pipe, the rear end tooth shape is meshed with the automatic reset of center shaft, and the welding angle of secondary pipe can be switched by adjusting the placing orientation of Z-shaped rack, the whole process uses pure mechanical transmission structure, the structure is simple and stable, and convenient to debug, can meet the welding needs of secondary pipe perpendicular to the axis of main pipe, and can also adapt to the welding working condition of secondary pipe and main pipe at an inclined angle.

Description

Technical Field

[0001] This invention relates to the field of metal structural component welding equipment technology, specifically a precision butt welding equipment for large metal structural components. Background Technology

[0002] As a structural form with reasonable stress distribution and excellent stiffness, tubular trusses are widely used in large-scale infrastructure projects such as stadium construction, bridge engineering, and steel structure workshops. The core processing procedure is to weld multiple secondary tubes to the outer wall of the main tube according to design requirements. Some secondary tubes not only need to be welded perpendicular to the axis of the main tube, but also need to be welded at a specific angle to the axis of the main tube to meet different structural stress and shape requirements.

[0003] Currently, the welding of main and auxiliary tubes of tubular trusses mostly adopts traditional tooling combined with manual operation, which has many technical defects in actual production: On the one hand, the adjustment of the welding angle of the auxiliary tubes depends on manual adjustment of tooling or electric servo drive mechanism. For the switching between vertical welding and multi-angle oblique welding, it is necessary to frequently change the fixture or adjust the electric control parameters. Not only is the adjustment process cumbersome and the positioning accuracy difficult to guarantee, but the pure electric angle adjustment structure is also complex and costly, and is prone to failure due to interference from welding conditions, and cannot achieve stable linkage between angle adjustment and reset; On the other hand, the axial feed and circumferential rotation of the main tube are difficult to coordinate precisely, and cannot flexibly adapt to the welding points of auxiliary tubes at different positions and spacings on the outer periphery of the main tube. The equipment has poor versatility and cannot meet the flexible production needs of diverse tubular trusses.

[0004] To address the problems of inconvenient angle adjustment, insufficient positioning accuracy of main and auxiliary tubes, and poor welding stability in the existing technologies, there is an urgent need to develop a special butt welding equipment for pipe trusses that is simple in structure, reliable in adjustment, and precise in positioning. Summary of the Invention

[0005] The purpose of this invention is to provide a precision butt welding device for large metal structural components to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a precision butt welding device for large metal structural components, comprising a base and an angle adjustment assembly. A guide rail is fixedly installed in the middle of the base, and a movable support plate slides horizontally on the guide rail. A main pipe is received inside the V-shaped notch of the movable support plate, and a Z-shaped rack is fixedly installed along the length direction on the side of the movable support plate. The angle adjustment assembly is installed on the side end of the base. The angle adjustment assembly includes a base fixedly installed on the side end of the base. A central shaft is rotatably installed in the middle of the base, and a reversing gear is coaxially fixed at the bottom of the central shaft, and a first steering gear is coaxially fixed at the top of the central shaft. A side shaft is rotatably installed on the side of the base, and a second steering gear is coaxially fixed on the side shaft, and the second steering gear meshes with the outer peripheral teeth of the reversing gear for transmission.

[0007] Furthermore, the teeth at both horizontal ends of the Z-shaped rack mesh with steering gear one and steering gear two respectively, and the orientation of the Z-shaped rack is adjusted according to the rotation direction of the central axis. The teeth at the front end of the Z-shaped rack in the moving direction of the moving pallet are used for angle adjustment, while the teeth at the rear end are used for angle reset.

[0008] Furthermore, a movable rotation assembly is installed at the end of the base. The movable rotation assembly includes an end plate fixedly installed at the end of the base. A translation drive cylinder is bolted to the outside of the end plate, and a sliding seat is fixedly connected to the telescopic end of the translation drive cylinder. The front ends of the sliding seat are fixed to the movable support plate through connecting parts on both sides.

[0009] Furthermore, the movable rotating assembly also includes a bearing housing fixedly installed in the middle of the front end of the sliding seat. A rotary drive motor is bolted to the back of the sliding seat, and the rotating end of the rotary drive motor is fixedly connected to a rotating shaft through a coupling. The rotating shaft is in rotational engagement with the bearing inside the bearing housing.

[0010] Furthermore, the moving and rotating assembly also includes a clamping plate fixedly connected to the end of the rotating shaft. The outer circumference of the clamping plate is fixed to the outer circle of the end of the main pipe by bolts. The rotation drive motor controls the rotation of the main pipe through the clamping plate at the end of the rotating shaft, and the translation drive cylinder controls the axial feed of the moving pallet and the main pipe above it through the sliding seat.

[0011] Furthermore, a butt welding assembly is installed on the central shaft. The butt welding assembly includes a guide plate fixedly installed at the top of the central shaft. The guide plate has a secondary tube inside its V-shaped notch. The secondary tube is welded to the outer periphery of the main tube at a certain preset angle with the axis of the main tube. The butt welding requirements of the secondary tube at different positions and angles on the outer periphery can be met by the rotation and axial feed of the main tube.

[0012] Furthermore, the butt welding assembly also includes a feeding and pushing cylinder bolted to one end of the guide plate, the telescopic end of the feeding and pushing cylinder being tightly abutted against the end of the secondary pipe, and connecting plates being fixedly connected to both ends of the other side of the guide plate.

[0013] Furthermore, the butt welding assembly also includes a fixing plate fixedly installed at the end of the connecting plate. The fixing plate has a toothed ring inside the recess on its end face that limits rotation, and a welding gun is fixed on the end face of the toothed ring.

[0014] Furthermore, the butt welding assembly also includes a welding drive motor fixedly installed at the bottom of the other side of the guide plate. The rotating end of the welding drive motor is fixedly connected to a pinion, and the outer peripheral teeth of the pinion mesh with the inner ring teeth of the gear ring for transmission. Under the transmission of the welding drive motor, the gear ring drives the welding torch fixed at its end face to rotate and weld around the butt joint of the main pipe and the auxiliary pipe.

[0015] Furthermore, the butt welding assembly also includes a gantry frame fixedly installed on the top of the other side of the guide plate. A torsion spring support is fixedly installed on the top of the notch of the gantry frame, and an anti-jump pressure roller is rotatably installed on the outside of the torsion spring support. The anti-jump pressure roller is tightly fitted to the outer periphery of the secondary tube to prevent radial runout during welding of the secondary tube.

[0016] This invention provides a precision butt welding device for large metal structural components, which has the following beneficial effects; 1. This device achieves automated adjustment and precise reset of the welding angle of the secondary tube through the mechanical meshing of the Z-shaped rack and the angle adjustment component. The front teeth of the Z-shaped rack along the feed direction of the moving pallet mesh with the first or second steering gear, driving the central shaft and guide plate to deflect to match the preset welding angle between the secondary tube and the main tube axis. The rear teeth cooperate with the reversing gear to achieve automatic reset of the central shaft. The welding angle of the secondary tube can be switched by adjusting the orientation of the Z-shaped rack. The entire process adopts a pure mechanical transmission structure, without relying on complex electronic control sensing and servo drive systems. The structure is simple and stable, and easy to debug. It can meet the welding requirements of the secondary tube perpendicular to the main tube axis, and can also adapt to the welding conditions where the secondary tube and the main tube are at an inclined angle. The angle adjustment is precise and reliable, effectively reducing the risk of equipment failure and maintenance costs.

[0017] 2. This device, through the combined axial feed and circumferential rotation of the main pipe, along with the adjustable preset welding angle of the secondary pipe, can flexibly and accurately locate any welding point on the outer periphery of the main pipe. The translational drive cylinder moves the main pipe axially along the guide rail to determine the axial installation position of the secondary pipe. The rotary drive motor drives the main pipe to rotate through the chuck to adjust the circumferential installation angle of the secondary pipe. Combined with the angle adjustment component, the tilt welding angle of the secondary pipe can be controlled. It can fully meet the welding requirements of secondary pipes at different positions and tilt angles on the outer periphery of the main pipe. It can be adapted to the welding processing of various pipe trusses without changing tooling fixtures, greatly improving the versatility and flexible production capacity of the equipment.

[0018] 3. In this application, the butt welding assembly uses a feeding and pushing hydraulic cylinder to accurately push and press the secondary tube, ensuring that the end of the secondary tube fits tightly against the outer wall of the main tube to guarantee a uniform butt gap. At the same time, the anti-jump pressure roller driven by the torsion spring support on the gantry frame provides elastic radial compression to the secondary tube, effectively preventing radial runout and positional displacement of the secondary tube during welding. In addition, the welding drive motor drives the gear ring and welding torch to rotate and weld around the butt joint of the main and secondary tubes through gear transmission, realizing automated circumferential welding of the butt weld of the main and secondary tubes. This not only ensures the stability and butt joint accuracy of the welding process, but also improves the weld formation quality and welding efficiency, reduces manual intervention, and is suitable for the large-scale and standardized welding production of pipe trusses. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a schematic diagram of the moving and rotating component structure of the present invention; Figure 3 This is a schematic diagram of the welding structure between the main pipe and the auxiliary pipe of the present invention; Figure 4 This is a schematic diagram of the angle adjustment component structure of the present invention; Figure 5 This is a schematic diagram of the assembly structure of the angle adjustment component and the butt welding component of the present invention; Figure 6 This is a schematic diagram of the butt welding assembly of the present invention. Figure 7 This is a schematic diagram of the butt welding assembly of the present invention.

[0020] In the diagram: 1. Base; 2. Guide rail; 3. Moving pallet; 4. Main pipe; 5. Z-shaped rack; 6. Angle adjustment assembly; 601. Base; 602. Central shaft; 603. Reversing gear; 604. Steering gear one; 605. Side shaft; 606. Steering gear two; 7. Moving and rotating assembly; 701. End plate; 702. Translation drive cylinder; 703. Sliding seat; 704. Bearing seat; 705. Rotary drive motor; 706. Rotating shaft; 707. Clamping plate; 8. Butt welding assembly; 801. Guide plate; 802. Secondary pipe; 803. Feeding and pushing cylinder; 804. Connecting plate; 805. Fixed plate; 806. Gear ring; 807. Welding torch; 808. Welding drive motor; 809. Pinion; 810. Gantry frame; 811. Torsion spring support; 812. Anti-jump pressure roller. Detailed Implementation

[0021] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention. Please see Figures 3 to 5This invention provides a technical solution: a precision butt welding device for large metal structural components, comprising a base 1 and an angle adjustment assembly 6. A guide rail 2 is fixedly installed in the middle of the base 1, and a movable support plate 3 slides horizontally on the guide rail 2. A main pipe 4 is received inside the V-shaped notch of the movable support plate 3, and a Z-shaped rack 5 is fixedly installed along the length of the side of the movable support plate 3. The angle adjustment assembly 6 is installed on the side of the base 1, and includes a base 601 fixedly installed on the side of the base 1. A central shaft 602 is rotatably installed in the middle of the base 601, and a reversing gear is coaxially fixed at the bottom of the central shaft 602. 603, and a steering gear 604 is coaxially fixed at the top of the central shaft 602, a side shaft 605 is rotatably mounted on the side of the base 601, and a steering gear 606 is coaxially fixed on the side shaft 605, and the steering gear 606 meshes with the outer peripheral gear teeth of the reversing gear 603 for transmission, the teeth at both horizontal ends of the Z-shaped rack 5 mesh with the steering gear 604 and the steering gear 606 respectively, and the orientation of the Z-shaped rack 5 is adjusted according to the rotation direction of the central shaft 602, and the teeth at the front end of the Z-shaped rack 5 in the moving direction of the moving support plate 3 are used for angle adjustment and the teeth at the rear end are used for angle reset; The specific operation is as follows: While the moving pallet 3 moves axially, the Z-shaped rack 5 fixed on its side moves synchronously. The teeth at both horizontal ends of the Z-shaped rack 5 sequentially mesh with the first steering gear 604 and the second steering gear 606 of the angle adjustment component 6. The front teeth of the Z-shaped rack 5 along the feed direction of the moving pallet 3 mesh with the corresponding steering gear first, causing the central shaft 602 to deflect. This adjusts the welding angle of the top guide plate 801 and the secondary tube 802 of the central shaft 602, satisfying the welding requirement that the secondary tube 802 and the main tube 4 have a preset angle. When the rear teeth of the Z-shaped rack 5 mesh with another steering gear, this steering gear, through meshing with the reversing gear 603, drives the central shaft 602 to rotate in the opposite direction, achieving angle reset. Furthermore, the orientation of the Z-shaped rack 5 can be adjusted as needed, realizing the switching control of different oblique welding angles of the secondary tube 802. This device uses the Z-shaped rack 5 and the angle... The mechanical meshing of the angle adjustment component 6 enables automated adjustment and precise reset of the welding angle of the secondary tube 802. The front teeth of the Z-shaped rack 5 along the feed direction of the moving support plate 3 first mesh with the first steering gear 604 or the second steering gear 606, driving the central shaft 602 and the guide plate 801 to deflect to match the preset welding angle between the secondary tube 802 and the main tube 4 axis. The rear teeth cooperate with the reversing gear 603 to achieve automatic reset of the central shaft 602. The welding angle of the secondary tube 802 can be switched by adjusting the orientation of the Z-shaped rack 5. The entire process adopts a pure mechanical transmission structure, without relying on complex electronic control sensing and servo drive systems. The structure is simple and stable, and easy to debug. It can meet the welding requirements of the secondary tube 802 being perpendicular to the axis of the main tube 4, and can also adapt to the welding conditions where the secondary tube 802 and the main tube 4 are at an inclined angle. The angle adjustment is precise and reliable, effectively reducing the risk of equipment failure and maintenance costs. Please see Figures 1 to 2 A movable rotation assembly 7 is installed at the end of the base 1. The movable rotation assembly 7 includes an end plate 701 fixedly installed at the end of the base 1. A translation drive cylinder 702 is bolted to the outer side of the end plate 701, and a sliding seat 703 is fixedly connected to the telescopic end of the translation drive cylinder 702. The front ends of the sliding seat 703 are fixed to the movable support plate 3 through connectors. The movable rotation assembly 7 also includes a bearing seat 704 fixedly installed at the middle of the front end of the sliding seat 703. A rotary drive motor 705 is bolted to the back of the sliding seat 703. The rotating end of the drive motor 705 is fixedly connected to the rotating shaft 706 via a coupling, and the rotating shaft 706 is rotatably engaged with the bearing inside the bearing housing 704. The moving rotating assembly 7 also includes a chuck 707 fixedly connected to the end of the rotating shaft 706. The outer circumference of the chuck 707 is fixed to the outer circle of the end of the main pipe 4 via bolts. The rotation drive motor 705 controls the rotation of the main pipe 4 via the chuck 707 at the end of the rotating shaft 706, and the translation drive cylinder 702 controls the axial feed of the moving support plate 3 and the main pipe 4 above it via the sliding seat 703. The specific operation is as follows: the end of the main pipe 4 is fixed to the clamp 707 of the moving and rotating assembly 7 with bolts to complete the clamping and positioning of the main pipe 4. After the rotation drive motor 705 is started, it drives the clamp 707 and the main pipe 4 to rotate circumferentially through the rotating shaft 706. The translation drive cylinder 702 drives the sliding seat 703 to move horizontally, thereby driving the moving support plate 3 and the main pipe 4 supported on it to complete the axial feed along the guide rail 2 of the base 1. Through the rotation of the main pipe 4 and the axial feed, the installation position of the auxiliary pipe 802 to be welded on the outer periphery of the main pipe 4 is precisely controlled. This device, through the dual motion of the axial feed and circumferential rotation of the main pipe 4, combined with the auxiliary pipe 802, achieves precise control. 2. The adjustable preset welding angle can flexibly and accurately position any welding point on the outer periphery of the main pipe 4. The translation drive cylinder 702 drives the main pipe 4 to move axially along the guide rail 2 to determine the axial installation position of the secondary pipe 802. The rotation drive motor 705 drives the main pipe 4 to rotate through the chuck 707 to adjust the circumferential installation angle of the secondary pipe 802. Combined with the angle adjustment component 6 to achieve the tilt welding angle control of the secondary pipe 802, it can fully meet the butt welding requirements of the secondary pipe 802 at different positions and tilt angles on the outer periphery of the main pipe 4. It can adapt to the welding processing of various pipe trusses without changing the tooling fixtures, which greatly improves the versatility and flexible production capacity of the equipment. Please see Figures 4 to 7A butt welding assembly 8 is installed on the central shaft 602. The butt welding assembly 8 includes a guide plate 801 fixedly installed at the top of the central shaft 602. A secondary tube 802 is received inside the V-shaped notch of the guide plate 801. The secondary tube 802 is welded to the outer periphery of the main tube 4 at a certain preset angle with the axis of the main tube 4. The butt welding requirements of the secondary tube 802 at different positions and angles on the outer periphery can be met by the rotation and axial feed of the main tube 4. The butt welding assembly 8 also includes a feeding and pushing cylinder 803 bolted to one end of the guide plate 801. The telescopic end of the feeding and pushing cylinder 803 is tightly abutted against the end of the secondary tube 802. Connecting plates 804 are fixedly connected to both ends of the other side of the guide plate 801. The butt welding assembly 8 also includes a fixing plate 805 fixedly installed at the end of the connecting plate 804. A toothed ring 8 is limited to rotate inside the notch on the end face of the fixing plate 805. 06, and a welding gun 807 is fixed on the end face of the gear ring 806. The butt welding assembly 8 also includes a welding drive motor 808 fixedly installed on the bottom of the other side of the guide plate 801. A pinion 809 is fixedly connected to the rotating end of the welding drive motor 808. The outer circumferential teeth of the pinion 809 mesh with the inner ring teeth of the gear ring 806 for transmission. Under the transmission of the welding drive motor 808, the gear ring 806 drives the welding gun 807 fixed on its end face to rotate and weld around the butt joint of the main pipe 4 and the secondary pipe 802. The butt welding assembly 8 also includes a gantry frame 810 fixedly installed on the top of the other side of the guide plate 801. A torsion spring support 811 is fixedly installed on the top of the notch of the gantry frame 810. An anti-jump pressure roller 812 is rotatably installed on the outside of the torsion spring support 811. The anti-jump pressure roller 812 is tightly fitted with the outer circumference of the secondary pipe 802 to prevent radial runout of the secondary pipe 802 during welding. The specific operation is as follows: the secondary tube 802 is placed in the V-shaped notch of the guide plate 801. The feeding and pushing cylinder 803 is activated to push the secondary tube 802 towards the main tube 4, so that the end of the secondary tube 802 is tightly pressed against the outer wall of the main tube 4. When the secondary tube 802 passes through the area of ​​the gantry 810, the torsion spring support 811 drives the anti-jump pressure roller 812 to rotate elastically, so that the anti-jump pressure roller 812 is tightly pressed against the outer circumference of the secondary tube 802, effectively limiting the radial runout of the secondary tube 802 during the welding process. After the welding process is started, the welding drive motor 808 drives the gear ring 806 to rotate within the fixed plate 805 through the meshing of the pinion 809. The welding gun 807 on the end face of the gear ring 806 then makes a circular motion around the joint between the main tube 4 and the secondary tube 802, completing the circumferential welding operation. Combined with the rotation of the main tube 4, the axial feed, and the adjustable angle design of the secondary tube 802, the outer circumference of the main tube 4 is finally achieved. For precise butt welding of secondary tubes 802 at different positions and angles, the butt welding assembly 8 in this application uses a feeding and pushing cylinder 803 to precisely push and press the secondary tubes 802 together, ensuring that the end of the secondary tube 802 is tightly fitted to the outer wall of the main tube 4 to ensure uniform butt gap. At the same time, the anti-jump pressure roller 812 driven by the torsion spring support 811 on the gantry frame 810 elastically and radially presses the secondary tubes 802, effectively preventing radial runout and positional displacement of the secondary tubes 802 during the welding process. In addition, the welding drive motor 808 drives the gear ring 806 and the welding gun 807 to rotate and weld around the butt joint of the main and secondary tubes 802 through gear transmission, realizing the automated circumferential welding operation of the butt weld of the main and secondary tubes 802. This not only ensures the stability and butt joint accuracy of the welding process, but also improves the weld formation quality and welding efficiency, reduces manual intervention, and is suitable for the large-scale and standardized welding production of pipe trusses.

[0022] In summary, when using precision butt welding equipment for this large metal structural component: First, the end of the main pipe 4 is fixed to the clamp 707 of the moving and rotating assembly 7 with bolts, completing the clamping and positioning of the main pipe 4. After the rotation drive motor 705 is started, it drives the clamp 707 and the main pipe 4 to rotate circumferentially through the rotating shaft 706. The translation drive cylinder 702 drives the sliding seat 703 to move horizontally, thereby driving the moving support plate 3 and the main pipe 4 supported on it to complete the axial feed along the guide rail 2 of the base 1. Through the rotation of the main pipe 4 and the axial feed, the installation position of the auxiliary pipe 802 to be welded on the outer periphery of the main pipe 4 is precisely controlled. This device, through the dual motion of the axial feed and circumferential rotation of the main pipe 4, combined with the auxiliary pipe 802, can... The adjustable preset welding angle can flexibly and accurately position any welding point on the outer periphery of the main pipe 4. The translation drive cylinder 702 drives the main pipe 4 to move axially along the guide rail 2 to determine the axial installation position of the secondary pipe 802. The rotation drive motor 705 drives the main pipe 4 to rotate through the chuck 707 to adjust the circumferential installation angle of the secondary pipe 802. Combined with the angle adjustment component 6 to achieve the tilt welding angle control of the secondary pipe 802, it can fully meet the butt welding requirements of the secondary pipe 802 at different positions and tilt angles on the outer periphery of the main pipe 4. It can adapt to the welding processing of various pipe trusses without changing the tooling fixtures, which greatly improves the versatility and flexible production capacity of the equipment. Secondly, as the moving pallet 3 moves axially, the Z-shaped rack 5 fixed on its side moves synchronously. The teeth at both horizontal ends of the Z-shaped rack 5 mesh sequentially with the first steering gear 604 and the second steering gear 606 of the angle adjustment component 6. The teeth at the front end of the Z-shaped rack 5 along the feed direction of the moving pallet 3 mesh with the corresponding steering gear first, causing the central shaft 602 to deflect, thereby adjusting the welding angle of the top guide plate 801 and the secondary tube 802 of the central shaft 602 to meet the welding requirement that the secondary tube 802 and the axis of the main tube 4 form a preset angle. When the rear teeth of the Z-shaped rack 5 mesh with another steering gear, the steering gear, through meshing with the reversing gear 603, drives the central shaft 602 to rotate in the opposite direction to achieve angle reset. Moreover, the orientation of the Z-shaped rack 5 can be adjusted as needed to achieve switching control of different oblique welding angles of the secondary tube 802. This device uses the Z-shaped rack 5 and the angle adjustment component 6 to achieve the same effect. The mechanical meshing of component 6 enables automated adjustment and precise reset of the welding angle of the secondary tube 802. The front teeth of the Z-shaped rack 5 along the feed direction of the moving pallet 3 first mesh with the first steering gear 604 or the second steering gear 606, driving the central shaft 602 and the guide plate 801 to deflect to match the preset welding angle between the secondary tube 802 and the main tube 4 axis. The rear teeth cooperate with the reversing gear 603 to achieve automatic reset of the central shaft 602. The welding angle of the secondary tube 802 can be switched by adjusting the orientation of the Z-shaped rack 5. The entire process adopts a pure mechanical transmission structure, without relying on complex electronic control sensing and servo drive systems. The structure is simple and stable, and easy to debug. It can meet the welding requirements of the secondary tube 802 being perpendicular to the axis of the main tube 4, and can also adapt to the welding conditions where the secondary tube 802 and the main tube 4 are at an inclined angle. The angle adjustment is precise and reliable, effectively reducing the risk of equipment failure and maintenance costs. Finally, the secondary tube 802 is placed in the V-shaped notch of the guide plate 801. The feeding and pushing cylinder 803 is activated to push the secondary tube 802 towards the main tube 4, so that the end of the secondary tube 802 is tightly pressed against the outer wall of the main tube 4. When the secondary tube 802 passes through the area of ​​the gantry 810, the torsion spring support 811 drives the anti-jump pressure roller 812 to rotate elastically, so that the anti-jump pressure roller 812 is tightly pressed against the outer circumference of the secondary tube 802, effectively limiting the radial runout of the secondary tube 802 during the welding process. After the welding process is started, the welding drive motor 808 drives the gear ring 806 to rotate within the fixed plate 805 through the meshing transmission of the pinion 809. The welding gun 807 on the end face of the gear ring 806 then makes a circular motion around the joint between the main tube 4 and the secondary tube 802, completing the circumferential welding operation. Combined with the rotation of the main tube 4, the axial feed, and the adjustable angle design of the secondary tube 802, the different outer circumferences of the main tube 4 are finally achieved. For precise butt welding of secondary tubes 802 at different positions and angles, the butt welding assembly 8 in this application uses a feeding and pushing cylinder 803 to precisely push and press the secondary tubes 802 together, ensuring that the end of the secondary tube 802 fits tightly against the outer wall of the main tube 4 to ensure a uniform butt gap. At the same time, the anti-jump pressure roller 812 driven by the torsion spring support 811 on the gantry frame 810 elastically and radially presses the secondary tubes 802, effectively preventing radial runout and positional displacement of the secondary tubes 802 during the welding process. In addition, the welding drive motor 808 drives the gear ring 806 and the welding gun 807 to rotate and weld around the butt joint of the main and secondary tubes 802 through gear transmission, realizing the automated circumferential welding operation of the butt weld of the main and secondary tubes 802. This not only ensures the stability and butt joint accuracy of the welding process, but also improves the weld formation quality and welding efficiency, reduces manual intervention, and is suitable for the large-scale and standardized welding production of pipe trusses.

[0023] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, and the existence of an infinite number of specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A precision butt welding apparatus for large metal structural components, comprising a base (1) and an angle adjustment assembly (6), characterized in that, A guide rail (2) is fixedly installed in the middle of the base (1), and a movable support plate (3) slides horizontally on the guide rail (2). The movable support plate (3) has a main pipe (4) inside its V-shaped notch, and a Z-shaped rack (5) is fixedly installed on the side of the movable support plate (3) along its length. The angle adjustment component (6) is installed on the side of the base (1). The angle adjustment component (6) includes a base (601) fixedly installed on the side of the base (1). A central shaft (602) is rotatably installed in the middle of the base (601), and a reversing gear (603) is coaxially fixed at the bottom of the central shaft (602). A first steering gear (604) is coaxially fixed at the top of the central shaft (602). A side shaft (605) is rotatably installed on the side of the base (601), and a second steering gear (606) is coaxially fixed on the side shaft (605). The second steering gear (606) meshes with the outer peripheral gear teeth of the reversing gear (603) for transmission.

2. The precision butt welding apparatus for large metal structural members according to claim 1, wherein The teeth at both horizontal ends of the Z-shaped rack (5) mesh with steering gear one (604) and steering gear two (606) respectively. The orientation of the Z-shaped rack (5) is adjusted according to the rotation direction of the central shaft (602). The teeth at the front end of the Z-shaped rack (5) in the moving direction of the moving pallet (3) are used for angle adjustment, while the teeth at the rear end are used for angle reset.

3. The precision butt welding apparatus for large metal structural members according to claim 2, wherein The base (1) is equipped with a movable rotating assembly (7). The movable rotating assembly (7) includes an end plate (701) fixedly installed at the end of the base (1). A translation drive cylinder (702) is bolted to the outside of the end plate (701). A sliding seat (703) is fixedly connected to the telescopic end of the translation drive cylinder (702). The front ends of the sliding seat (703) are fixed to the movable support plate (3) through connectors.

4. The precision butt welding equipment for large metal structural components according to claim 3, characterized in that, The moving and rotating assembly (7) also includes a bearing seat (704) fixedly installed at the middle of the front end of the sliding seat (703). A rotary drive motor (705) is bolted to the back of the sliding seat (703), and the rotating end of the rotary drive motor (705) is fixedly connected to a rotating shaft (706) through a coupling. The rotating shaft (706) is in rotational cooperation with the bearing inside the bearing seat (704).

5. The precision butt welding equipment for large metal structural components according to claim 4, characterized in that, The moving and rotating assembly (7) also includes a clamp (707) fixedly connected to the end of the rotating shaft (706). The outer periphery of the clamp (707) is fixed to the outer circle of the end of the main pipe (4) by bolts. The rotation drive motor (705) controls the rotation of the main pipe (4) through the clamp (707) at the end of the rotating shaft (706). The translation drive cylinder (702) controls the axial feed of the moving pallet (3) and the main pipe (4) above it through the sliding seat (703).

6. The precision butt welding equipment for large metal structural components according to claim 5, characterized in that, A butt welding assembly (8) is installed on the central shaft (602). The butt welding assembly (8) includes a guide plate (801) fixedly installed on the top of the central shaft (602). The guide plate (801) has a V-shaped notch that receives a secondary tube (802). The secondary tube (802) is welded to the outer periphery of the main tube (4) at a certain preset angle with the axis of the main tube (4). The rotation and axial feed of the main tube (4) can meet the butt welding requirements of the secondary tube (802) at different positions and angles on its outer periphery.

7. The precision butt welding equipment for large metal structural components according to claim 6, characterized in that, The butt welding assembly (8) also includes a feeding and pushing cylinder (803) bolted to one end of the guide plate (801). The telescopic end of the feeding and pushing cylinder (803) is in close contact with the end of the sub-pipe (802). The other two ends of the guide plate (801) are fixedly connected to connecting plates (804).

8. The precision butt welding equipment for large metal structural components according to claim 7, characterized in that, The butt welding assembly (8) further includes a fixed plate (805) fixedly installed at the end of the connecting plate (804). The fixed plate (805) has a toothed ring (806) inside the recess on the end face of the fixed plate (805) for limiting rotation, and a welding gun (807) is fixed on the end face of the toothed ring (806).

9. The precision butt welding equipment for large metal structural components according to claim 8, characterized in that, The butt welding assembly (8) also includes a welding drive motor (808) fixedly installed on the bottom of the other side of the guide plate (801). The rotating end of the welding drive motor (808) is fixedly connected to a pinion (809), and the outer peripheral teeth of the pinion (809) mesh with the inner ring teeth of the gear ring (806) for transmission. Under the transmission of the welding drive motor (808), the gear ring (806) drives the welding gun (807) fixed on its end face to rotate and weld around the butt joint of the main pipe (4) and the auxiliary pipe (802).

10. A precision butt welding equipment for large metal structural components according to claim 9, characterized in that, The butt welding assembly (8) also includes a gantry (810) fixedly installed on the top of the other side of the guide plate (801). A torsion spring support (811) is fixedly installed on the top of the notch of the gantry (810), and an anti-jump pressure roller (812) is rotatably installed on the outside of the torsion spring support (811). The anti-jump pressure roller (812) is tightly fitted to the outer periphery of the sub-tube (802) to prevent radial runout during welding of the sub-tube (802).

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