Steel structure net rack automatic welding equipment

Abstract

The application discloses a kind of steel structure net rack automatic welding equipment, it is related to steel structure welding equipment technical field, including long cantilever, the bottom of cantilever is equipped with welding assembly, welding assembly includes fixed frame and lifting frame, the inner bottom of lifting frame is fixedly installed with welding head;Follow-up plate is fixedly installed with the lateral wall of lifting frame by slide arm, cleaning knife seat is installed in one side of swing mechanism;Cleaning mechanism is installed in the other side of swing mechanism, integrated with the cleaning mechanism and cleaning knife seat of follow-up setting on welding assembly, can be completed respectively H type net rack weld before welding impurity cleaning and after welding slag, welding nodule cleaning, cooperate with the blowing structure of cleaning knife seat and synchronize blowing away debris, without manual equipment intervention, both solve the problem of low efficiency, not thorough weld slag, pore defect caused by manual cleaning, also avoid the condition that manual cleaning damages weld body, guarantee weld mechanical property and forming aesthetic degree.

Description

Technical Field

[0001] This invention relates to the field of steel structure welding equipment technology, and in particular to an automatic welding equipment for steel structure space frames. Background Technology

[0002] Existing steel structure space frame welding equipment is mainly used for welding H-shaped space frame components. The core is to use gantry cranes, welding components and other structures to drive the welding head to weld the seams of the H-shaped space frame. At the same time, some equipment may have basic position adjustment functions to realize the welding processing of H-shaped space frames.

[0003] The publication number CN121245132B discloses a steel structure space frame welding equipment, which mainly includes a main pipe fixing mechanism, multiple sets of pressure displacement mechanisms, multiple sets of auxiliary pipe fixing mechanisms, multiple sets of arc welding mechanisms, a pipe diameter synchronous detection and feedback mechanism, and a PLC controller. It can realize the synchronous welding of multiple auxiliary pipes to the main pipe, and can automatically adjust the contact pressure, rotation welding speed and clamping fixing force according to the pipe diameter of the auxiliary pipes, thereby ensuring the welding firmness, connection strength and contact pressure stability of the steel structure space frame.

[0004] However, existing automatic welding equipment for steel structure space frames still has some problems:

[0005] The existing equipment does not integrate an automated cleaning structure. Before welding, it is necessary to manually remove impurities such as rust, dust, and oil from the surface of the H-shaped space frame weld by manual cleaning or cleaning equipment. Manual cleaning is not only inefficient but also incomplete. Impurities will affect the formation of the weld pool and increase the probability of defects such as slag inclusions and porosity in the weld. After welding, it is necessary to manually remove welding slag, weld beads, spatter, etc. from the weld surface, either by hand or by cleaning equipment. Manual cleaning is labor-intensive and can easily damage the weld body and impair its mechanical properties. At the same time, the welding slag debris can easily re-adhere to the weld surface after cleaning, affecting the aesthetics of the weld formation and failing to meet the efficiency and quality requirements of mass production.

[0006] Furthermore, the components of existing equipment, such as welding components, cleaning components, and gas supply components, operate independently in the welding, cleaning, and gas supply stages. Manual intervention is required to switch and coordinate each stage, making it impossible to achieve integrated operation. The overall level of automation is low, which not only increases labor costs but also makes it easy for human error to lead to low work efficiency and unstable welding quality, making it difficult to meet the actual needs of mass production of steel structure space frames. Summary of the Invention

[0007] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0008] In view of the problems existing in the above and / or existing automatic welding equipment for steel structure space frames, the present invention is proposed.

[0009] Therefore, the problem to be solved by the present invention is how to solve the problem that the existing automatic welding equipment for steel structure space frames has low efficiency and poor effect in pre-weld and post-weld cleaning due to the lack of integrated automatic cleaning structure. At the same time, the welding, cleaning and gas supply components are independent of each other and require manual intervention to switch, resulting in low overall automation and failing to meet the efficiency and quality requirements of mass production of steel structure space frames.

[0010] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic welding equipment for steel structure space frame, including a gantry crane, a crossbeam installed on the gantry crane, a centering drive mechanism installed on the bottom surface of the crossbeam, a cantilever installed on the slide of the centering drive mechanism, and a welding assembly installed at the bottom of the cantilever, characterized in that: the welding assembly includes a fixed frame and a lifting frame, the lifting frame is slidably installed in the fixed frame via an electric push rod, and a welding head is fixedly installed at the inner bottom of the lifting frame; a follower plate is fixedly installed to the side wall of the lifting frame via a sliding arm, and the sliding arm is slidably connected in a groove opened in the side wall of the fixed frame; a swing mechanism is rotatably installed at the bottom of the follower plate, and the swing mechanism adjusts the swing angle via an air duct switching component; a cleaning blade holder is installed on one side of the swing mechanism; and a cleaning mechanism is installed on the other side of the swing mechanism.

[0011] Preferably, the swing mechanism includes a swing seat and an extension plate. The two side walls of the swing seat are fixedly connected to the extension plate, and the swing seat is rotatably connected to the inner side wall of the follower plate via a rotating shaft. An arc-shaped groove is provided on the side wall of the swing seat, and a sliding column is slidably connected in the arc-shaped groove. The sliding column is fixedly connected to the inner side wall of the follower plate.

[0012] Preferably, the cleaning blade holder is mounted on an extension plate on one side of the swing seat, and an air outlet is provided through the bottom surface of the cleaning blade holder, which is connected to the air passage switching component.

[0013] Preferably, the cleaning mechanism includes a brush wheel, which is rotatably mounted in the end of the extension plate. The drive shaft of the brush wheel is connected to the drive motor via a sprocket drive component. A vertical plate is fixedly connected to the end of the extension plate, and the drive motor is fixedly mounted on the side wall of the vertical plate.

[0014] Preferably, the airway switching assembly includes two sets of driving components. The driving components are installed on the bottom inner wall of the follower plate. Each driving component includes a driving air cylinder and a driving piston rod. A fixed plate is fixedly connected to the bottom inner wall of the follower plate. The driving air cylinder is installed on the fixed plate. The driving piston rod slides in the driving air cylinder. The bottom of the driving piston rod is rotatably connected to the top two sides of the swing seat through a hinge seat.

[0015] Preferably, the airway switching assembly further includes a protective gas supply component and an air supply component. The outlet end of the protective gas supply component is respectively connected to the inlet end of the welding head and one set of driving air cylinders. The outlet end of the air supply component is respectively connected to the outlet hole of the cleaning knife holder and another set of driving air cylinders.

[0016] Preferably, the protective gas supply component includes a protective gas branch pipe and a protective gas main pipe. The side wall of the protective gas main pipe is connected to one end of the protective gas branch pipe, and the other end of the protective gas branch pipe is connected to one of the drive air cylinders. The outlet end of the protective gas main pipe is connected to the inlet end of the welding head. A protective gas supply cylinder is connected to the inlet end of the protective gas main pipe. The inlet end of the protective gas supply cylinder is connected to a protective gas storage tank through a protective gas inlet pipe. The protective gas storage tank is installed on the side wall of the gantry crane. The inner wall of the protective gas supply cylinder is slidably connected to a protective gas piston rod, and the bottom end of the protective gas piston rod is fixedly connected to a drive plate. The top surface of the drive plate is fixedly mounted with a first drive frame, and the two sides of the first drive frame are mounted on the side wall of the follower plate.

[0017] Preferably, the air supply component includes an air supply cylinder. The air inlet end of the air supply cylinder is connected to an air storage tank via an air inlet pipe. The air outlet end of the air supply cylinder is connected to one end of the main air pipe. The other end of the main air pipe is connected to a cutter holder branch pipe and an air branch pipe, respectively. The air outlet end of the cutter holder branch pipe is connected to the air outlet of the cleaning cutter holder. The air outlet end of the air branch pipe is connected to another set of drive air cylinders. An air piston rod is slidably connected inside the air supply cylinder. A second drive frame is fixedly installed at the top of the air piston rod, and the two sides of the second drive frame are fixedly installed on the side wall of the lifting frame.

[0018] Preferably, the outlet of the protective gas supply cylinder is located below the protective gas supply cylinder, the outlet of the air supply cylinder is located above the air supply cylinder, the protective gas piston rod is located below the protective gas supply cylinder, and the air piston rod is located above the air supply cylinder. The protective gas supply cylinder and the air supply cylinder are alternately connected by the lifting and lowering movement of the follower plate and the lifting frame.

[0019] Preferably, a wedge-shaped welding frame is installed below the gantry crane, and the supporting surface of the wedge-shaped welding frame is inclined.

[0020] The beneficial effects of this invention are: 1. This technical solution integrates a follow-up cleaning mechanism and a cleaning knife holder on the welding assembly, which can respectively complete the pre-welding impurity cleaning and post-welding slag and weld bead cleaning of the H-shaped space frame weld. In conjunction with the air blowing structure of the cleaning knife holder, debris is blown away simultaneously without manual intervention. This not only solves the problems of low efficiency and incomplete cleaning caused by manual cleaning, such as weld inclusions and porosity defects, but also avoids damage to the weld body by manual cleaning, thus ensuring the mechanical properties and aesthetic appearance of the weld.

[0021] 2. This technical solution integrates the cleaning mechanism and cleaning tool holder with the welding head lifting frame via a follower plate. The cleaning component can move up and down and move synchronously with the welding component, allowing pre-welding cleaning, automatic welding, and post-welding cleaning to form a continuous operation. This eliminates the need for manual coordination of each step, solving the problem of independent components and excessive manual intervention, and improving welding efficiency and quality stability.

[0022] 3. This technical solution integrates the protective gas supply, compressed air supply, swing mechanism drive, weld pool protection, and post-weld blowing slag removal functions into one unit through the gas duct switching component. It relies on the lifting frame and follower plate to realize the automatic alternating conduction of the gas duct, so that the gas supply, drive, welding, and cleaning links are automatically coordinated and matched. There is no need to add a separate power source or manually switch the gas duct, which further simplifies the equipment structure, improves the overall automation level, and can better adapt to the actual needs of mass production of steel structure space frame. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an overall structural diagram of an automatic welding equipment for steel space frames.

[0025] Figure 2 This is a structural diagram of the gantry crane, centering drive mechanism, and welding components for an automatic welding equipment for steel structure space frames.

[0026] Figure 3 This is a structural diagram of the electrode feeding device, welding components, and gas storage tank installation for an automatic welding equipment for steel structure space frames.

[0027] Figure 4This is a structural diagram of the swing mechanism, cleaning tool holder, cleaning mechanism, and welding components of an automatic welding equipment for steel structure space frames.

[0028] Figure 5 This is a structural diagram of the welding components of an automatic welding equipment for steel space frames.

[0029] Figure 6 This is a structural diagram of the swing mechanism of an automatic welding equipment for steel space frames.

[0030] Figure 7 This is a structural diagram of the protective gas supply component in the gas duct switching assembly of an automatic welding equipment for steel structure space frames.

[0031] Figure 8 This is a structural diagram of the air supply component in the air duct switching assembly of an automatic welding equipment for steel structure space frames.

[0032] Figure 9 This is a diagram showing the internal structure of the protective gas supply cylinder and the air supply cylinder for the automatic welding equipment of steel structure space frame.

[0033] In the diagram: 1. Wedge-shaped welding frame; 2. H-shaped space frame; 3. Guide rail; 4. Gantry crane; 5. Crossbeam; 6. Centering drive mechanism; 61. Slide seat; 7. Cantilever; 8. Welding assembly; 81. Fixed frame; 82. Support plate; 83. Electric push rod; 84. Lifting frame; 85. Welding head; 86. Side support plate; 87. Slide groove; 88. Follower plate; 881. Fixed plate; 89. Slide arm; 9. Welding electrode feeding device; 10. Protective gas storage tank; 101. Protective gas inlet pipe; 11. Air storage tank; 111. Air inlet pipe; 12. Swinging mechanism; 121. Swing seat; 122. Extension plate; 123. Rotating shaft; 124. Arc groove; 125. Slide arm Column; 126. Vertical plate; 13. Cleaning knife holder; 131. Air outlet; 14. Cleaning mechanism; 141. Brush wheel; 142. Sprocket drive component; 143. Drive motor; 15. Airway switching assembly; 151. Drive component; 15101. Drive air cylinder; 15102. Drive piston rod; 152. Protective gas branch pipe; 153. Protective gas main pipe; 154. Protective gas supply cylinder; 155. Drive plate; 156. Protective gas piston rod; 157. First drive frame; 158. Second drive frame; 159. Air supply cylinder; 1510. Air piston rod; 1511. Air main pipe; 1512. Knife holder branch pipe; 1513. Air branch pipe. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0037] Example 1, referring to Figures 1-3 This is the first embodiment of the present invention, which provides an automatic welding equipment for steel structure space frames, including a gantry crane 4. The bottom sides of the gantry crane 4 slide on guide rails 3. A crossbeam 5 is installed on the gantry crane 4. A centering drive mechanism 6 is installed on the bottom surface of the crossbeam 5. A cantilever 7 is installed on the slide seat 61 of the centering drive mechanism 6. A welding assembly 8 is installed at the bottom of the cantilever 7. The welding assembly 8 includes a fixed frame 81 and a lifting frame 84. The lifting frame 84 is slidably installed in the fixed frame 81 by an electric push rod 83. A support plate 82 is installed inside the fixed frame 81. The bottom surface of the electric push rod 83 is fixedly installed on the support plate 82. Furthermore, the telescopic shaft of the electric push rod 83 passes through the clearance groove on the support plate 82 and is fixedly installed on the top surface of the lifting frame 84. The inner bottom of the lifting frame 84 is fixedly installed with a welding head 85. A wedge-shaped welding frame 1 is installed below the gantry crane 4. The support surface of the wedge-shaped welding frame 1 is inclined. The H-shaped space frame 2 is placed on the inclined surface of the wedge-shaped welding frame 1. When the H-shaped space frame 2 is placed on the inclined surface, the right-angle weld at the connection between the flange plate and the web plate of the H-shaped space frame 2 can be in the welding position. This effectively solves the problem that the molten pool is easily flowed due to gravity when welding at an incline, which facilitates the formation of the weld pool and reduces defects such as slag inclusion and collapse in the weld.

[0038] The H-shaped space frame 2 is the welding object of this equipment. By placing it on the inclined surface of the wedge-shaped welding frame 1, it is in a preset inclined welding posture. The right-angle welds of its flange plate and web plate are aligned with the preset welding trajectory of the welding head 85, ensuring that the welding head 85 can accurately act on the weld position, so as to realize the integrated welding and forming of the H-shaped space frame component.

[0039] The inclined welding station is provided by the wedge welding frame 1, so that the welding part of the H-shaped space frame 2 is facing upward. Then, by moving the gantry crane 4, adjusting the position of the centering drive mechanism 6, and adjusting the height of the welding component 8, the welding head 85 is driven to realize the continuous automatic welding of the H-shaped space frame 2. The working principle of the gantry crane 4 and the centering drive mechanism 6 are existing technologies, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0040] When welding the H-shaped space frame 2 is required, the H-shaped space frame 2 is placed on the inclined surface of the wedge-shaped welding frame 1. At the upper and lower ends of the inclined surface of the wedge-shaped welding frame 1, liftable pressure blocks and clamping components are set. The clamping force counteracts the gravity component of the inclined surface, locking the entire H-shaped space frame 2 in the inclined position. There is no slippage or displacement during the entire welding process. The gantry crane 4 is started, which drives the crossbeam 5, the centering drive mechanism 6, the cantilever 7, the welding component 8, and the welding head 85 to move to the welding start position. The centering drive mechanism 6 drives the slide 61 to move, which drives the cantilever 7 and the welding component 8 to adjust left and right, so that the welding head 85 is accurately aligned with the weld of the H-shaped space frame 2. The electric push rod 83 is started, which drives the lifting frame 84 to slide up and down, adjusting the distance between the welding head 85 and the weld to make it at the optimal welding height. Finally, the welding head 85 is started, and at the same time, the gantry crane 4 is controlled to move smoothly along the length of the wedge-shaped welding frame 1 to realize the continuous automatic welding of the long strip weld of the H-shaped space frame 2.

[0041] Among them, the top surface of the gantry crane 4 is also equipped with a welding rod feeding device 9. The welding rod is fed by the welding rod feeding device 9 to continuously provide the welding rod required for welding head 85. The working principle of the welding rod feeding device 9 is existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0042] Example 2, refer to Figures 4-6 This is the second embodiment of the present invention. Based on the previous embodiment, the follower plate 88 is fixedly installed on the side wall of the lifting frame 84 via the sliding arm 89, and the sliding arm 89 is slidably connected in the sliding groove 87 opened in the side wall of the fixed frame 81. The swing mechanism 12 is rotatably installed on the bottom of the follower plate 88, and the swing mechanism 12 is adjusted by the airway switching component 15. The follower plate 88 serves as the mounting carrier of the swing mechanism 12, supporting the swing mechanism 12, the cleaning mechanism 14, and the cleaning knife holder 13, and simultaneously achieving synchronous lifting and lowering with the lifting frame 84. By being fixedly connected to the lifting frame 84 via the sliding arm 89, it is ensured that when the lifting frame 84 is lifted and lowered, the follower plate 88 can synchronously follow the lifting and lowering, thereby driving the swing mechanism 12, the cleaning mechanism 14, the cleaning knife holder 13, and the welding head 85 to maintain the same height.

[0043] The airway switching component 15 provides swing power to the swing mechanism 12, adjusts the swing angle of the swing mechanism 12, and realizes the attitude switching between the cleaning mechanism 14 and the cleaning knife holder 13. By switching the gas pressure in the airway, the swing mechanism 12 is driven to rotate around the rotating shaft 123, thereby driving the cleaning mechanism 14 and the cleaning knife holder 13 to lift or fall, thus completing the switching between the two cleaning functions.

[0044] The cleaning mechanism 14 is installed on the other side of the swing mechanism 12. When the gantry crane 4 drives the welding head 85 to weld from one side of the H-shaped space frame 2, the cleaning mechanism 14 is located on the side of the welding head 85, that is, the cleaning mechanism 14 is located in the unwelded area of ​​the H-shaped space frame 2. The right-angle weld between the flange plate and the web plate is pre-cleaned by the cleaning mechanism 14 to remove impurities from the weld surface, providing a clean and flat welding reference for subsequent welding and ensuring welding quality.

[0045] Specifically, the cleaning mechanism 14 includes a brush wheel 141, which is rotatably mounted in the end of the extension plate 122. The drive shaft of the brush wheel 141 is connected to the drive motor 143 via a sprocket drive component 142. A vertical plate 126 is fixedly connected to the end of the extension plate 122, and the drive motor 143 is fixedly mounted on the side wall of the vertical plate 126.

[0046] The drive motor 143 drives the brush wheel 141 to rotate at high speed through the sprocket transmission component 142. The brush wheel 141 scrapes and cleans the surface of the right-angle weld between the flange plate and the web plate of the H-shaped space frame 2, removing rust, dust, oil and other impurities, to ensure that the weld surface is clean.

[0047] The cleaning blade holder 13 is installed on one side of the swing mechanism 12. The swing mechanism 12 includes a swing seat 121 and an extension plate 122. The two side walls of the swing seat 121 are fixedly connected to the extension plate 122 respectively. The swing seat 121 is rotatably connected to the inner side wall of the follower plate 88 through a rotating shaft 123. The rotating shaft 123 provides a rotation fulcrum for the swing of the swing seat 121, so that the swing seat 121 can rotate flexibly around the rotating shaft 123, realizing the attitude switching between the cleaning mechanism 14 and the cleaning blade holder 13. The side wall of the swing seat 121 is provided with an arc-shaped groove 124. A sliding column 125 is slidably connected in the arc-shaped groove 124. The sliding column 125 is fixedly connected to the inner side wall of the follower plate 88. The sliding column 125, together with the arc-shaped groove 124, limits the swing trajectory and angle of the swing seat 121, and at the same time provides support and limit for the swing seat 121, preventing the swing seat 121 from tilting or falling off when swinging.

[0048] The cleaning knife holder 13 is installed on the extension plate 122 on one side of the swing seat 121. After one end of the H-shaped space frame 2 is welded to the other end, that is, after the H-shaped space frame 2 is welded, the swing seat 121 is driven by the swing air passage switching component 15, causing one end of the cleaning mechanism 14 to tilt up and the cleaning knife holder 13 to fall down, so as to clean the weld after welding. The cleaning knife holder 13 is used to clean the weld after welding, remove welding slag, welding beads, spatter, etc. from the surface of the weld, and trim the weld shape to ensure that the weld surface is flat and smooth.

[0049] Furthermore, an air outlet 131 is provided through the bottom surface of the cleaning tool holder 13, which is connected to the air channel switching component 15. Compressed air is ejected through the air outlet 131, and the air is provided by the air channel switching component 15. The air blows away the welding slag, debris and dust scraped off by the cleaning tool holder 13 in time, preventing debris from adhering to the weld surface and ensuring that the weld surface is clean.

[0050] Example 3, referring to Figures 6-9 This is the third embodiment of the present invention, which is based on the first two embodiments. The airway switching assembly 15 includes two sets of driving components 151. The driving components 151 are installed on the bottom inner side wall of the follower plate 88. The driving component 151 includes a driving air cylinder 15101 and a driving piston rod 15102. A fixed plate 881 is fixedly connected to the bottom inner side wall of the follower plate 88. The driving air cylinder 15101 is installed on the fixed plate 881. The driving piston rod 15102 slides in the driving air cylinder 15101. The bottom of the driving piston rod 15102 is rotatably connected to the top two sides of the swing seat 121 through a hinge seat. Through the coordinated extension and retraction of the two sets of driving components 151, the swing seat 121 is driven to rotate around the rotating shaft 123, thereby realizing the attitude switching between the cleaning mechanism 14 and the cleaning knife holder 13.

[0051] Working principle: Two sets of driving components 151 are symmetrically installed on the bottom inner wall of the follower plate 88 and fixedly installed by the fixing plate 881. The fixing plate 881 provides a stable mounting carrier for the driving cylinder 15101, ensuring that the driving component 151 does not shake or deviate during operation. Each set of driving components 151 consists of a driving cylinder 15101 and a driving piston rod 15102. The driving piston rod 15102 can slide in a piston-like manner inside the driving cylinder 15101, and its bottom end is rotatably connected to the top two sides of the swing seat 121 through a hinged seat. The hinged connection method can be adapted to the rotation trajectory of the swing seat 121. To avoid motion interference, during operation, the two sets of drive components 151 alternately extend and retract, that is, one set extends and the other retracts, applying opposite forces to the top sides of the swing seat 121, causing the swing seat 121 to rotate smoothly around the rotating shaft 123. At the same time, with the guidance and limiting of the arc groove 124 and the sliding column 125, the swing angle is precisely controlled, thereby realizing the lifting of the cleaning mechanism 14 and the lowering of the cleaning knife holder 13, completing the attitude switching between pre-weld cleaning and post-weld cleaning. Moreover, the power of the drive component 151 comes from the subsequent protective gas supply component and air supply component, eliminating the need for an additional power source and simplifying the equipment structure.

[0052] The airway switching assembly 15 also includes a protective gas supply component and an air supply component. The outlet end of the protective gas supply component is connected to the inlet end of the welding head 85 and one of the drive air cylinders 15101 respectively. The outlet end of the air supply component is connected to the outlet hole 131 of the cleaning knife holder 13 and another set of drive air cylinders 15101 respectively. The airway switching assembly 15 realizes dual air supply through the protective gas supply component and the air supply component. The two air supply systems are independent of each other but cooperate with each other.

[0053] The protective gas supply component has two outlets. One outlet is connected to the inlet of the welding head 85 to provide the welding head 85 with the protective gas required for welding, so as to prevent the weld pool from being oxidized by air and ensure the welding quality. The other outlet is connected to one of the drive cylinders 15101 to provide extension and retraction power for the drive component 151.

[0054] The air supply component also has two outlets. One outlet is connected to the air outlet 131 of the cleaning tool holder 13 to provide compressed air to the air outlet 131 and realize the slag blowing function of post-weld cleaning. The other outlet is connected to another set of drive air cylinders 15101 to provide extension and retraction power to the drive component 151.

[0055] The protective gas supply component includes a protective gas branch pipe 152 and a protective gas main pipe 153. The side wall of the protective gas main pipe 153 is connected to one end of the protective gas branch pipe 152, and the other end of the protective gas branch pipe 152 is connected to one of the drive air cylinders 15101. The outlet end of the protective gas main pipe 153 is connected to the inlet end of the welding head 85. The inlet end of the protective gas main pipe 153 is connected to a protective gas supply cylinder 154. The protective gas supply cylinder 154 is fixedly installed on the side wall of the fixing frame 81 through a side support plate 86. The inlet end of the protective gas supply cylinder 154 is connected to the protective gas storage tank 10 through a protective gas inlet pipe 101. The protective gas storage tank 10 is installed on the side wall of the gantry crane 4. A protective gas piston rod 156 is slidably connected to the inner wall of the protective gas supply cylinder 154. A drive plate 155 is fixedly connected to the bottom end of the protective gas piston rod 156. A first drive frame 157 is fixedly installed on the top surface of the drive plate 155. The two sides of the first drive frame 157 are installed on the side walls of the follower plate 88.

[0056] A protective gas storage tank 10 is installed on the side wall of the gantry crane 4 to store the protective gas required for welding. As the source of protective gas supply, the protective gas storage tank 10 is connected to the protective gas supply cylinder 154 through the protective gas inlet pipe 101 to deliver the protective gas into the protective gas supply cylinder 154. The protective gas piston rod 156 in the protective gas supply cylinder 154 is fixedly connected to the drive plate 155. The drive plate 155 is connected to the side wall of the follower plate 88 through the first drive frame 157 to achieve synchronous linkage with the follower plate 88. When the follower plate 88 rises and falls with the lifting frame 84, it will drive the protective gas piston rod 156 to slide in the protective gas supply cylinder 154 through the first drive frame 157 and the drive plate 155, thereby controlling the opening and closing of the protective gas supply cylinder 154.

[0057] The outlet of the protective gas supply cylinder 154 is connected to the main protective gas pipe 153. The main protective gas pipe 153 is split through the protective gas branch pipe 152. One path is delivered to the welding head 85 through the main protective gas pipe 153 to provide protective gas for the welding process. The other path is delivered to one of the drive cylinders 15101 through the protective gas branch pipe 152 to drive the extension and retraction of the drive component 151. This ensures timely supply of protective gas during welding and stops supplying gas when not welding, saving protective gas costs. At the same time, it achieves linkage with the drive component 151, enabling the angle of the swing mechanism 12 to be switched.

[0058] The air supply unit includes an air supply cylinder 159, which is fixedly installed on the side wall of the fixing frame 81 via a side support plate 86. The air inlet end of the air supply cylinder 159 is connected to the air storage tank 11 via an air inlet pipe 111. The air outlet end of the air supply cylinder 159 is connected to one end of the main air pipe 1511. The other end of the main air pipe 1511 is connected to the cutter holder branch pipe 1512 and the air branch pipe 1513 respectively. The air outlet end of the cutter holder branch pipe 1512 is connected to the air outlet 131 of the cleaning cutter holder 13. The air outlet end of the air branch pipe 1513 is connected to another set of drive air cylinders 15101. An air piston rod 1510 is slidably connected inside the air supply cylinder 159. A second drive frame 158 is fixedly installed at the top of the air piston rod 1510. The two sides of the second drive frame 158 are fixedly installed on the side wall of the lifting frame 84.

[0059] The air storage tank 11 serves as a storage carrier for compressed air. It is connected to the air supply cylinder 159 through the air inlet pipe 111 to deliver compressed air into the air supply cylinder 159. The air piston rod 1510 inside the air supply cylinder 159 is fixedly connected to the second drive frame 158. The two sides of the second drive frame 158 are fixedly connected to the side walls of the lifting frame 84 to achieve synchronous linkage with the lifting frame 84. When the lifting frame 84 slides up and down under the drive of the electric push rod 83, it will drive the air piston rod 1510 to slide in the air supply cylinder 159 through the second drive frame 158, thereby controlling the opening and closing of the air supply cylinder 159. The air outlet of the air supply cylinder 159 is connected to the main air pipe 1511. The main air pipe 1511 is split through the tool holder branch pipe 1512 and the air branch pipe 1513. One path is delivered through the tool holder branch pipe 1512 to the air outlet 131 of the cleaning tool holder 13 to provide compressed air for slag blowing during post-weld cleaning. The other path is delivered through the air branch pipe 1513 to another set of drive air cylinders 15101, which drives the extension and retraction of the drive component 151 to ensure timely supply of slag blowing air during post-weld cleaning and to stop the air supply when cleaning is not needed. At the same time, it is linked with the drive component 151 to switch the angle of the swing mechanism 12.

[0060] It should be noted that the outlet of the protective gas supply cylinder 154 is located below the protective gas supply cylinder 154, the outlet of the air supply cylinder 159 is located above the air supply cylinder 159, the protective gas piston rod 156 is located below the protective gas supply cylinder 154, and the air piston rod 1510 is located above the air supply cylinder 159. The protective gas supply cylinder 154 and the air supply cylinder 159 are alternately connected by the lifting and lowering movement of the follower plate 88 and the lifting frame 84.

[0061] By adjusting the outlet positions of the protective gas supply cylinder 154 and the air supply cylinder 159 and the initial position of the piston rod, and combining the lifting linkage of the follower plate 88 and the lifting frame 84, the alternating conduction of the two gas supply systems is achieved. The outlet of the protective gas supply cylinder 154 is at the bottom, and the initial position of the protective gas piston rod 156 is at the top. When the follower plate 88 descends with the lifting frame 84, that is, when the welding head 85 approaches the weld and is preparing to weld or is welding, the first drive frame 157 will drive the drive plate 155 and the protective gas piston rod 156 to slide downward. At this time, the outlet of the protective gas supply cylinder 154 is connected, and the protective gas is delivered to the welding head 85 and the corresponding drive component 151 through the pipeline, providing power for the welding protection and swing mechanism 12 to switch to the pre-welding cleaning posture. After welding is completed, the air outlet of the air supply cylinder 159 is at the top and the initial position of the air piston rod 1510 is at the bottom. When the lifting frame 84 rises, the second drive frame 158 drives the air piston rod 1510 to slide upward, and the lifting frame 84 rises, that is, the welding head 85 moves away from the weld seam, driving the follower plate 88 to rise synchronously. At this time, the protective gas piston rod 156 rises with the follower plate 88, the air outlet of the protective gas supply cylinder 154 closes, and the supply of protective gas stops. At the same time, the air piston rod 1510 rises with the lifting frame 84, the air outlet of the air supply cylinder 159 is opened, and compressed air is delivered to the cleaning knife holder 13 and the corresponding drive component 151, providing power for the slag blowing and swing mechanism 12 to switch to the post-weld cleaning posture. Through the design of the air passage switching component 15, the power drive and air supply function are integrated, simplifying the equipment structure and reducing the equipment manufacturing and maintenance costs.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic welding equipment for steel structure space frame, comprising a gantry crane (4), a crossbeam (5) mounted on the gantry crane (4), a centering drive mechanism (6) mounted on the bottom surface of the crossbeam (5), a cantilever (7) mounted on the slide (61) of the centering drive mechanism (6), and a welding assembly (8) mounted on the bottom of the cantilever (7), characterized in that: The welding assembly (8) includes a fixed frame (81) and a lifting frame (84). The lifting frame (84) is slidably installed in the fixed frame (81) by an electric push rod (83). A welding head (85) is fixedly installed on the inner bottom of the lifting frame (84). Follower plate (88), the follower plate (88) is fixedly installed on the side wall of the lifting frame (84) through the sliding arm (89), and the sliding arm (89) is slidably connected in the sliding groove (87) opened in the side wall of the fixed frame (81); A swing mechanism (12) is rotatably mounted on the bottom of a follower plate (88), and the swing mechanism (12) adjusts the swing angle through an airway switching assembly (15). The swing mechanism (12) includes a swing seat (121) and an extension plate (122). The two side walls of the swing seat (121) are fixedly connected to the extension plate (122) respectively. The swing seat (121) is rotatably connected to the inner side wall of the follower plate (88) through a rotating shaft (123). An arc groove (124) is provided on the side wall of the swing seat (121). A sliding column (125) is slidably connected in the arc groove (124). The sliding column (125) is fixedly connected to the inner side wall of the follower plate (88). Cleaning knife holder (13) is installed on one side of the swing mechanism (12). The cleaning knife holder (13) is installed on the extension plate (122) on one side of the swing seat (121). The bottom surface of the cleaning knife holder (13) is provided with an air outlet (131) through it. The air outlet (131) is connected to the airway switching assembly (15). The airway switching assembly (15) includes two sets of driving components (151). The driving components (151) are installed on the bottom inner wall of the follower plate (88). The driving components (151) include a driving air cylinder (15101) and a driving piston rod (15102). A fixed plate (881) is fixedly connected to the bottom inner wall of the follower plate (88). The driving air cylinder (15101) is installed on the fixed plate (881). The driving piston rod (15102) slides in the driving air cylinder (15101). The bottom of the driving piston rod (15102) is rotatably connected to the top two sides of the swing seat (121) through a hinge seat. The airway switching assembly (15) also includes a protective gas supply component and an air supply component. The outlet end of the protective gas supply component is connected to the inlet end of the welding head (85) and one of the drive air cylinders (15101) respectively. The outlet end of the air supply component is connected to the outlet hole (131) of the cleaning knife holder (13) and another set of drive air cylinders (15101) respectively. The protective gas supply component includes a protective gas branch pipe (152) and a protective gas main pipe (153). The side wall of the protective gas main pipe (153) is connected to one end of the protective gas branch pipe (152), and the other end of the protective gas branch pipe (152) is connected to one of the drive cylinders (15101). The outlet end of the protective gas main pipe (153) is connected to the inlet end of the welding head (85). The inlet end of the protective gas main pipe (153) is connected to a protective gas supply cylinder (154). The inlet end of the protective gas supply cylinder (154) is connected to a protective gas storage tank (10) through a protective gas inlet pipe (101). The protective gas storage tank (10) is installed on the side wall of the gantry crane (4). The inner wall of the protective gas supply cylinder (154) is slidably connected to a protective gas piston rod (156), and the bottom end of the protective gas piston rod (156) is fixedly connected to a drive plate (155). The top surface of the drive plate (155) is fixedly installed with a first drive frame (157), and the two sides of the first drive frame (157) are installed on the side wall of the follower plate (88). The air supply component includes an air supply cylinder (159). The air inlet end of the air supply cylinder (159) is connected to the air storage tank (11) via an air inlet pipe (111). The air outlet end of the air supply cylinder (159) is connected to one end of the main air pipe (1511). The other end of the main air pipe (1511) is connected to the knife holder branch pipe (1512) and the air branch pipe (1513) respectively. The air outlet end of the knife holder branch pipe (1512) is connected to the air outlet (131) of the cleaning knife holder (13). The air outlet end of the air branch pipe (1513) is connected to another set of drive air cylinders (15101). An air piston rod (1510) is slidably connected inside the air supply cylinder (159). A second drive frame (158) is fixedly installed at the top of the air piston rod (1510). The two sides of the second drive frame (158) are fixedly installed on the side wall of the lifting frame (84). The outlet of the protective gas supply cylinder (154) is located below the protective gas supply cylinder (154), the outlet of the air supply cylinder (159) is located above the air supply cylinder (159), the protective gas piston rod (156) is located below the protective gas supply cylinder (154), and the air piston rod (1510) is located above the air supply cylinder (159). The protective gas supply cylinder (154) and the air supply cylinder (159) are alternately connected by the lifting and lowering movement of the follower plate (88) and the lifting frame (84). The cleaning mechanism (14) is installed on the other side of the swing mechanism (12).

2. The automatic welding equipment for steel structure space frames as described in claim 1, characterized in that: The cleaning mechanism (14) includes a brush wheel (141), which is rotatably mounted in the end of the extension plate (122). The drive shaft of the brush wheel (141) is connected to the drive motor (143) via a sprocket drive component (142). A vertical plate (126) is fixedly connected to the end of the extension plate (122), and the drive motor (143) is fixedly mounted on the side wall of the vertical plate (126).

3. The automatic welding equipment for steel structure space frames as described in claim 1, characterized in that: A wedge-shaped welding frame (1) is installed below the gantry crane (4), and the supporting surface of the wedge-shaped welding frame (1) is inclined.

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