Steel bar truss net rack welding device

Abstract

The invention belongs to the technical field of steel bar truss and net rack welding forming, and discloses a steel bar truss and net rack welding device which comprises a rack, an upper electrode assembly, an upper welding transverse moving assembly, an upper welding longitudinal moving assembly and a lower electrode assembly, and the rack is provided with a plurality of sets of steel bar trusses and a plurality of transverse bars; the upper electrode assembly comprises an upper welding fixing plate and a welding upper electrode; the upper welding transverse moving assembly comprises a transverse driving part, a transverse transmission assembly and a transverse moving frame, the output end of the transverse driving part is connected with the transverse moving frame through the transverse transmission assembly, and the transverse driving part is arranged on the upper welding fixing plate; the upper welding longitudinal moving assembly is arranged between the transverse moving frame and the rack; the lower electrode assembly comprises a movable beam and a welding lower electrode. Coarse positioning and fine alignment of the welding upper electrode and the welding position are achieved, the welding moving distance of the welding upper electrode is reduced, rapid welding is facilitated, and the welding forming efficiency of the steel bar truss net rack is improved.

Description

Technical Field

[0001] This invention relates to the field of steel truss space frame welding and forming technology, and in particular to a steel truss space frame welding device. Background Technology

[0002] Steel truss floor decks are constructed by welding steel trusses and a base slab together. Traditional steel trusses include top chords, bottom chords, and web members, with small lateral spans, and are mainly used for floor slabs and residential applications. For large-span spatial designs, steel truss space frames are generally used to provide greater stability.

[0003] like Figures 1-6 As shown, a steel truss space frame connects multiple steel trusses 100 (with or without bases 101) with multiple horizontal reinforcing bars 200 to form a frame-mesh structure. Currently, the welding process for steel truss space frame products involves manually placing the horizontal reinforcing bars 200 and using a welding torch for Methane welding. This method not only requires a large amount of manpower and is labor-intensive, posing significant safety hazards, but also has low processing efficiency and a low degree of automation. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device for steel truss space frames to solve the problem of low welding efficiency of steel truss space frames.

[0005] To achieve this objective, the present invention provides a welding device for a steel truss space frame, the steel truss space frame including steel trusses and transverse reinforcement; the welding device for the steel truss space frame includes:

[0006] The frame is provided with a truss support plate and a positioning component. Multiple sets of steel trusses to be welded are set on the truss support plate. Multiple transverse bars are positioned on the positioning component. Multiple transverse bars pass through multiple sets of steel trusses along a first horizontal direction and are positioned on the lower chord bars of the steel trusses.

[0007] The upper electrode assembly includes an upper welding fixing plate and a welding upper electrode, wherein the welding upper electrode is vertically adjustable on the upper welding fixing plate to weld the transverse reinforcement and the steel truss.

[0008] The upper welding lateral movement assembly includes a lateral drive, a lateral transmission assembly, and a lateral frame. The output end of the lateral drive is connected to the lateral frame through the lateral transmission assembly. The lateral drive is disposed on the upper welding fixing plate and is configured to drive the upper electrode assembly to move relative to the lateral frame along the first horizontal direction, so that the upper welding electrode can be moved sequentially to multiple welding positions.

[0009] The upper welding longitudinal moving assembly includes a longitudinal drive component and a longitudinal transmission component. The longitudinal drive component is fixed on the frame, and the output end of the longitudinal drive component is connected to the transverse frame through the longitudinal transmission component to drive the transverse frame to move relative to the frame in the vertical direction, so that the upper welding electrode can reciprocate between the welding position and the crossing position. The welding position refers to the position above the transverse reinforcement and not in contact with the transverse reinforcement, and the crossing position refers to the position above the steel truss and not in contact with the steel truss.

[0010] The lower electrode assembly includes a movable beam and multiple welding lower electrodes. The multiple welding lower electrodes are spaced apart on the movable beam along the first horizontal direction. The movable beam is located below the positioning assembly. The welding lower electrodes are positioned directly opposite the welding points of the transverse reinforcement and the steel truss.

[0011] In some embodiments, a welding station is provided on the truss support plate extending along the first horizontal direction. The positioning component is located at the welding station. The positioning component includes multiple positioning blocks. The multiple positioning blocks and multiple welding lower electrodes are alternately arranged along the first horizontal direction. The positioning blocks are provided with positioning grooves. The transverse ribs are positioned in the multiple positioning grooves. The positioning blocks are capable of moving up and down along the vertical direction.

[0012] In some embodiments, the upper electrode assembly further includes:

[0013] A cylinder seat is provided on the upper welding fixing plate. A guide post is slidably arranged inside the cylinder seat. The guide post passes through the upper welding fixing plate and is connected in sequence to a conductive plate and an electrode rod. The upper welding electrode or the upper conductive electrode is connected to the electrode rod.

[0014] A welding cylinder is mounted on a cylinder seat. The output rod of the welding cylinder is threadedly connected to a guide post with an upper welding electrode. The upper welding electrode and the lower welding electrode are correspondingly arranged to perform welding.

[0015] A conductive cylinder is mounted on another cylinder seat. The output rod of the conductive cylinder is threadedly connected to the guide post on which the conductive upper electrode is provided. The lower electrode assembly also includes a conductive lower electrode. The conductive upper electrode and the conductive lower electrode are correspondingly arranged and can be electrically connected during welding.

[0016] A transformer is mounted on the upper welded fixing plate, and the transformer is arranged correspondingly to the steel truss. The conductive plate is electrically connected to the transformer.

[0017] In some embodiments, the welding cylinders are arranged in pairs, and the two welding electrodes connected to the two welding cylinders in the pair simultaneously weld two lower chord bars on a set of steel trusses.

[0018] In some embodiments, the upper welding lateral movement assembly further includes a lateral movement guide assembly, which includes a lateral slider and a lateral guide rail. One of the lateral slider and the lateral guide rail is disposed on the upper welding fixing plate, and the other is disposed on the lateral movement frame. The lateral slider and the lateral guide rail are slidably fitted together.

[0019] In some embodiments, the lateral transmission assembly includes:

[0020] A transverse drive shaft is provided at both ends of the upper welded fixing plate along the second horizontal direction. The transverse drive shaft is fixed in the output hole of the transverse drive component, and both ends of the transverse drive shaft are rotatably mounted on the transverse support.

[0021] A transverse gear is fixed on a transverse transmission shaft, which can drive the transverse gear to rotate synchronously.

[0022] A transverse rack is disposed on the transverse frame and extends along the first horizontal direction. A transverse gear meshes with the transverse rack for transmission. When the transverse drive member drives the transverse transmission shaft to rotate, the transverse gear rolls on the transverse rack, thereby moving the upper welded fixing plate.

[0023] In some embodiments, the upper welding longitudinal moving assembly further includes a longitudinal moving guide assembly, which includes a longitudinal slider and a longitudinal guide rail. One of the longitudinal slider and the longitudinal guide rail is disposed on the frame, and the other is disposed on the transverse moving frame. The longitudinal slider and the longitudinal guide rail are slidably fitted together.

[0024] In some embodiments, the longitudinal drive assembly includes:

[0025] A longitudinal drive shaft is provided at both ends of the frame along the first horizontal direction. The longitudinal drive shaft is fixed in the output hole of the longitudinal drive member, and the two ends of the longitudinal drive shaft are rotatably mounted on the longitudinal support.

[0026] A longitudinal gear is fixed on the longitudinal transmission shaft, and the longitudinal transmission shaft can drive the longitudinal gear to rotate synchronously;

[0027] A longitudinal rack is disposed on the transverse frame and extends along the vertical direction. A longitudinal gear meshes with the longitudinal rack for transmission. When the longitudinal drive member drives the longitudinal drive shaft to rotate, the longitudinal gear drives the longitudinal rack to move up and down, thereby driving the transverse frame to move along the vertical direction.

[0028] In some embodiments, the lower electrode assembly further includes:

[0029] A fixed beam is fixedly mounted on the frame.

[0030] A lifting cylinder is fixed on the fixed beam. The piston rod of the lifting cylinder is vertically connected to the movable beam. Multiple sets of electrode seats are arranged at intervals along the first horizontal direction on the movable beam. The multiple sets of electrode seats are arranged corresponding to multiple sets of steel trusses. Each set of electrode seats is provided with a welding lower electrode and a conductive lower electrode.

[0031] In some embodiments, the lower electrode assembly further includes a lifting guide assembly, which includes a lifting slider and a lifting guide rail. One of the lifting slider and the lifting guide rail is disposed on the movable beam, and the other is disposed on the fixed beam. The lifting slider and the lifting guide rail are slidably mounted.

[0032] The beneficial effects of this invention are:

[0033] The steel truss mesh welding device provided by this invention, by setting up an upper electrode assembly, an upper welding lateral movement assembly, an upper welding longitudinal movement assembly, and a lower electrode assembly, allows the upper electrode assembly to move vertically after multiple sets of steel trusses and multiple transverse reinforcements are positioned on the truss support plate and positioning assembly on the machine frame. This enables the upper electrode assembly to move up and down at the crossing position. When the lowest position of the upper electrode assembly is slightly higher than the crossing position, the upper welding lateral movement assembly can move the upper electrode assembly in the first horizontal direction, allowing the upper electrode assembly to sequentially reach the welding position above the transverse reinforcements on each set of steel trusses. When the upper electrode assembly descends below the crossing position and is located at a designated position above the transverse reinforcement, the upper electrode approaches the transverse reinforcement, and the upper electrode assembly performs the welding operation. By controlling the overall movement of the upper electrode assembly, coarse positioning and fine alignment of the upper electrode with the welding position are achieved, reducing the welding movement distance of the upper electrode, facilitating rapid welding, and improving the welding forming efficiency of the steel truss mesh. Attached Figure Description

[0034] Figure 1 This is the front view of the steel truss space frame (the steel truss has a base) involved in the present invention.

[0035] Figure 2 This is a side view of the steel truss space frame (the steel truss has a base) involved in the present invention.

[0036] Figure 3 This is a top view of the steel truss space frame (the steel truss has a base) involved in this invention.

[0037] Figure 4 This is the front view of the steel truss space frame (the steel truss has no base) involved in the present invention.

[0038] Figure 5 This is a side view of the steel truss space frame (the steel truss has no base) involved in the present invention.

[0039] Figure 6 This is a top view of the steel truss space frame involved in the present invention (the steel truss has no base).

[0040] Figure 7 This is a structural schematic diagram of the steel truss grid welding device provided in an embodiment of the present invention;

[0041] Figure 8 This is a rear view of the steel truss grid welding device provided in an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the upper electrode assembly in the steel truss mesh welding device provided in an embodiment of the present invention;

[0043] Figure 10 This is a schematic diagram of the wiring connection of the upper electrode assembly in the steel truss mesh welding device provided in an embodiment of the present invention;

[0044] Figure 11 This is a schematic diagram of the lower electrode assembly in the steel truss mesh welding device provided in an embodiment of the present invention.

[0045] In the picture:

[0046] 100. Steel truss; 101. Base; 102. Bottom chord; 200. Horizontal reinforcement;

[0047] 1. Frame; 11. Truss support plate; 111. Welding station; 12. Positioning assembly; 121. Positioning block; 122. Positioning groove; 123. Lifting drive component; 124. Lifting plate; 125. Adjusting rod; 126. Guide rod;

[0048] 2. Upper electrode assembly; 21. Upper welding fixing plate; 22. Welding upper electrode; 23. Cylinder seat; 231. Guide post; 232. Conductive plate; 233. Electrode rod; 24. Welding cylinder; 25. Conductive cylinder; 26. Conductive upper electrode; 27. Transformer; 271. First collector terminal; 272. Second collector terminal; 273. First wire; 274. Second wire; 275. Third wire;

[0049] 3. Upper welding of the transverse movement assembly; 31. Transverse drive component; 32. Transverse transmission assembly; 321. Transverse transmission shaft; 322. Transverse support base; 323. Transverse gear; 324. Transverse rack; 33. Transverse frame; 34. Transverse movement guide assembly; 341. Transverse slider; 342. Transverse guide rail; 343. Vertical plate;

[0050] 4. Upper welded longitudinal moving assembly; 41. Longitudinal drive component; 42. Longitudinal transmission assembly; 421. Longitudinal transmission shaft; 422. Longitudinal support base; 423. Longitudinal gear; 424. Longitudinal rack; 43. Longitudinal moving guide assembly; 431. Longitudinal slider; 432. Longitudinal guide rail;

[0051] 5. Lower electrode assembly; 51. Movable beam; 52. Welded lower electrode; 53. Conductive lower electrode; 54. Electrode seat; 55. Lifting cylinder; 56. Fixed beam; 57. Lifting guide assembly; 571. Lifting slider; 572. Lifting guide rail. Detailed Implementation

[0052] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0053] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0056] The purpose of this invention is to provide a welding device for steel truss space frames to solve the problem of low welding efficiency in steel truss space frame construction. For example... Figures 1-6 As shown, the steel truss space frame includes steel truss 100 and transverse reinforcement 200. Figures 1-6 The image shows a configuration where six steel trusses 100 are simultaneously connected to two horizontal reinforcing bars 200. The horizontal reinforcing bars 200 are located on the lower chord reinforcing bars 102 of the steel trusses 100 and are welded and fixed. The steel trusses 100 include two types: those with bases 101 and those without bases 101. Figure 1 and Figure 4 As shown, the lower chord reinforcement 102 of the steel truss 100 is at different heights, and therefore the horizontal reinforcement 200 is at different heights on the steel truss 100. Therefore, when positioning and welding the steel truss 100 and the horizontal reinforcement 200, the specific structure of the steel truss 100 needs to be considered. In the existing technology, the positioning and welding of the steel truss 100 and the horizontal reinforcement 200 are all done manually, which is labor-intensive and inefficient, and urgently needs to be improved.

[0057] like Figures 7-11To improve the welding efficiency of the steel truss 100 and the transverse reinforcement 200, this embodiment of the invention provides a steel truss mesh welding device, including a frame 1 and an upper electrode assembly 2, an upper welding transverse movement assembly 3, an upper welding longitudinal movement assembly 4, and a lower electrode assembly 5 disposed on the frame 1. The frame 1 is provided with a truss support plate 11 and a positioning assembly 12. Multiple sets of steel trusses 100 to be welded are disposed on the truss support plate 11. Each set of steel trusses 100 is arranged along a second horizontal direction (Y direction), and the multiple sets of steel trusses 100 are spaced apart along a first horizontal direction (X direction). Multiple transverse reinforcements 200 are positioned on the positioning assembly 12, and the multiple transverse reinforcements 200 pass through the multiple sets of steel trusses 100 along the first horizontal direction and are positioned on the lower chord reinforcement 102 of the steel truss 100. A clearance is provided on the truss support plate 11 along the first horizontal direction to serve as a welding station 111. The welding positions of the steel truss 100 and the cross rib 200 are located at the welding station 111, and the upper electrode assembly 2 and the lower electrode assembly 5 perform welding operations at the welding station 111.

[0058] The upper electrode assembly 2 includes an upper welding fixing plate 21 and a welding upper electrode 22. The welding upper electrode 22 is vertically adjustable and is mounted on the upper welding fixing plate 21 to weld the transverse ribs 200 and the steel truss 100; for example... Figure 7 and Figure 9 As shown, the upper electrode assembly 2 is positioned adjustablely above the welding station 111. After being aligned with the welding positions of the steel truss 100 and the transverse reinforcement 200 by position adjustment, the upper electrode 22 moves vertically and quickly performs the welding operation, resulting in high welding efficiency. By setting the number of upper electrodes 22, multiple welding points can be welded simultaneously in a single movement, further improving welding efficiency. Typically, the upper electrodes 22 are arranged in pairs, with each pair of two upper electrodes 22 simultaneously welding the transverse reinforcement 200 onto the two lower chord reinforcements 102 of a set of steel trusses 100. For the transverse reinforcements 200 on the steel truss 100, the length of each transverse reinforcement 200 requires welding at least two sets of steel trusses 100. Therefore, the upper electrode assembly 2 generally includes two pairs of upper electrodes 22. The simultaneous welding action of the two pairs of upper electrodes 22 improves welding efficiency and ensures good uniformity of the weld.

[0059] The upper welding lateral movement assembly 3 includes a lateral drive component 31, a lateral transmission component 32, and a lateral frame 33. The output end of the lateral drive component 31 is connected to the lateral frame 33 via the lateral transmission component 32. The lateral drive component 31 is mounted on the upper welding fixing plate 21 and is configured to drive the upper electrode assembly 2 to move relative to the lateral frame 33 along a first horizontal direction, allowing the welding upper electrode 22 to move sequentially above multiple welding positions. It can be understood that the body of the lateral drive component 31 is fixed to the upper welding fixing plate 21, and the output end of the lateral drive component 31 is connected to the lateral frame 33, enabling relative positional movement between the lateral frame 33 and the upper welding fixing plate 21, thereby allowing adjustment of the position of the welding upper electrode 22 on the upper welding fixing plate 21. In this embodiment, the upper welding lateral movement assembly 3 is used to drive the upper electrode assembly 2 to reciprocate along the first horizontal direction, thereby causing multiple welding upper electrodes 22 to sequentially weld and fix the transverse rib 200 to the steel truss 100 along the length direction of the transverse rib 200. The distance that the horizontal drive component 31 moves the welded fixed plate 21 each time it drives can be preset and initially adjusted according to the size of the steel truss 100, which improves the consistency and accuracy of the action and is conducive to automated control.

[0060] The upper welding longitudinal movement assembly 4 includes a longitudinal drive component 41 and a longitudinal transmission assembly 42. The longitudinal drive component 41 is fixed on the frame 1. The output end of the longitudinal drive component 41 is connected to the transverse frame 33 through the longitudinal transmission assembly 42 to drive the transverse frame 33 to move vertically relative to the frame 1, so that the welding upper electrode 22 can reciprocate between the welding position and the crossing position. The welding position refers to the position above the transverse rib 200 and not in contact with the transverse rib 200, and the crossing position refers to the position above the steel truss 100 and not in contact with the steel truss 100. It can be understood that the longitudinal drive component 41 is set between the transverse frame 33 and the frame 1, which can realize the lifting and lowering movement of the transverse frame 33 on the frame 1, and has a limiting function for the transverse frame 33, so that the transverse frame 33 can only move up and down on the frame 1. Therefore, when the transverse drive component 31 is activated, the position of the transverse frame 33 does not move, and the upper welding fixing plate 21 moves relative to the transverse frame 33, thereby realizing the directional movement control of the welding upper electrode 22. By setting the upper welding longitudinal moving component 4, the upper welding electrode 22 can move vertically. The lowest point (welding point) of the upper welding electrode 22 can move between the crossing position and the welding position, achieving rapid positioning in the vertical direction. During each welding operation, the lowest point of the upper welding electrode 22 is located at the crossing position as the initial position. At this time, the upper welding electrode 22 can move along the first horizontal direction to the welding position of the steel truss 100 and the horizontal bar 200 to be welded, achieving one horizontal positioning. The upper welding longitudinal moving component 4 drives the upper welding electrode 22 to descend from the crossing position to the welding position and stop, achieving one longitudinal positioning. Then, the upper welding electrode 22 descends relative to the upper welding fixing plate 21 and presses against the horizontal bar 200, welding the horizontal bar 200 to the lower chord bar 102. The upper welding electrode 22 moves upward until it is separated from the horizontal bar 200, ending one welding operation. The upper welding longitudinal moving component 4 drives the lowest point of the upper welding electrode 22 back to the initial position (crossing position), and the upper welding lateral moving component 3 drives the upper welding electrode 22 to move to the next set of welding positions. This process is repeated to achieve the welding and forming of multiple sets of steel trusses 100 and multiple horizontal ribs 200 on the frame 1, resulting in high efficiency and high product quality.

[0061] The lower electrode assembly 5 includes a movable beam 51 and multiple welding lower electrodes 52. The welding lower electrodes 52 are spaced apart on the movable beam 51 along a first horizontal direction. The movable beam 51 is located below the positioning assembly 12. The welding lower electrodes 52 are positioned directly opposite the welding points of the transverse reinforcement 200 and the steel truss 100. By setting multiple welding lower electrodes 52, frequent movement of the welding lower electrodes 52 during welding can be avoided, reducing the difficulty of welding alignment. The multiple welding lower electrodes 52 are corresponding to the welding positions of two lower chord reinforcements 102 on multiple sets of steel trusses 100. During welding, only the welding upper electrode 22 needs to be moved to align with the welding lower electrode 52 for welding, which helps improve welding efficiency. Fixing multiple welding lower electrodes 52 simultaneously on the movable beam 51 facilitates the overall arrangement and installation of the multiple welding lower electrodes 52. Especially when the height of multiple welding lower electrodes 52 needs to be adjusted, simultaneous adjustment can be achieved by controlling the height of the movable beam 51, greatly improving efficiency and consistency.

[0062] The steel truss mesh welding device provided by the present invention, by setting up an upper electrode assembly 2, an upper welding lateral movement assembly 3, an upper welding longitudinal movement assembly 4, and a lower electrode assembly 5, allows the upper electrode assembly 2 to move vertically after multiple sets of steel trusses 100 and multiple transverse reinforcements 200 are positioned on the truss support plate 11 and positioning assembly 12 on the frame 1. This enables the upper electrode assembly 2 to move up and down at the crossing position. When the lowest position of the upper electrode assembly 2 is slightly higher than the crossing position, the upper welding lateral movement assembly 3 facilitates the movement of the upper electrode assembly 2 in the first horizontal direction, allowing the upper electrode assembly 2 to sequentially reach each crossbar along the first horizontal direction. The welding position above the steel truss 100 and the horizontal reinforcement 200 will not interfere with the top of the steel truss 100. When the upper electrode assembly 2 descends below the crossing position and is located at the designated position above the horizontal reinforcement 200, the welding upper electrode 22 approaches the horizontal reinforcement 200. At this time, the welding upper electrode 22 of the upper electrode assembly 2 moves relative to the upper welding fixing plate 21 and performs the welding operation of the welding upper electrode 22. In this way, through the overall movement control of the upper electrode assembly 2, the coarse positioning and fine alignment of the welding upper electrode 22 with the welding position are achieved, reducing the welding movement distance of the welding upper electrode 22, which is conducive to rapid welding and improves the welding forming efficiency of the steel truss grid.

[0063] In some embodiments, a welding station 111 is provided on the truss support plate 11 extending along the first horizontal direction. A positioning component 12 is provided at the welding station 111. The positioning component 12 includes a plurality of positioning blocks 121. The plurality of positioning blocks 121 and a plurality of welding lower electrodes 52 are alternately arranged along the first horizontal direction. The positioning blocks 121 are provided with positioning grooves 122. The horizontal ribs 200 are positioned in the plurality of positioning grooves 122. The positioning blocks 121 can move up and down in the vertical direction.

[0064] Combination Figure 7and Figure 11 As shown, the welding station 111 can be formed by two independently set truss support plates 11 spaced apart. Multiple positioning blocks 121 in the positioning assembly 12 can move up and down in the vertical direction at the welding station 111 to meet the positioning requirements of the horizontal reinforcement 200 to be welded on different types of steel trusses 100. Among them, the positioning blocks 121 and the welding lower electrode 52 are alternately set. The positioning grooves 122 on the positioning blocks 121 and the welding lower electrode 52 are coaxially set in the first horizontal direction. The long axis of the horizontal reinforcement 200 moves along the first horizontal direction and is loaded into the positioning groove 122, and then continues to move into the welding lower electrode 52. Then the next positioning groove 122, the next welding lower electrode 52, and after passing through multiple positioning grooves 122 and welding lower electrodes 52, the movement is limited and stopped, and the loading is in place. One end of the positioning groove 122 has a flared opening, which facilitates the guidance of the horizontal reinforcement 200 to the welding lower electrode 52, making it easy to load and position. In some embodiments, the bottom of each positioning block 121 is threadedly connected to an adjusting rod 125, the bottom end of the adjusting rod 125 is threadedly connected to a lifting plate 124, and the bottom end of the lifting plate 124 is connected to the output rod of a lifting drive 123. The lifting drive 123 is mounted on the frame 1 or on the fixed beam 56 of the lower electrode assembly 5. A guide rod 126 is provided between the lifting plate 124 and the frame 1 (or the fixed beam 56). The top end of the guide rod 126 is fixedly connected to the lifting plate 124, and the bottom end is slidably mounted on the frame 1 or the fixed beam 56. When the lifting plate 124 is raised, the guide rod 126 is lowered. When the driving component 123 drives the lifting plate 124 to move up and down, the guide rod 126 is used to maintain the stability and directionality of the lifting plate 124 in the vertical direction. The lifting plate 124 simultaneously drives multiple positioning blocks 121 to move up and down, which facilitates the uniform rise of the positioning slots 122 to a position higher than the welding lower electrode 52 and lower than the upper chord of the steel truss 100 when the horizontal reinforcement 200 is being fed. This coordinates with the horizontal reinforcement 200 feeding mechanism to receive the horizontal reinforcement 200, achieving positioning of the horizontal reinforcement 200 and the steel truss 100, facilitating welding. The steel truss 100 includes two types: with a base 101 and without a base 101. By setting the lifting plate 124, the position of the horizontal reinforcement 200 can be adjusted according to the type of steel truss 100, improving versatility in positioning.

[0065] In some embodiments, the upper electrode assembly 2 further includes a cylinder seat 23, a welding cylinder 24, a conductive cylinder 25, and a transformer 27. The cylinder seat 23 is mounted on the upper welding fixing plate 21. A guide post 231 is slidably disposed within the cylinder seat 23. The guide post 231 passes through the upper welding fixing plate 21 and is sequentially connected to a conductive plate 232 and an electrode rod 233. The electrode rod 233 is connected to either a welding upper electrode 22 or a conductive upper electrode 26. The welding cylinder 24 is mounted on a cylinder seat 23, and the output rod of the welding cylinder 24 is threadedly connected to a component with a welding upper electrode. The guide post 231 of 22 is provided for welding the upper electrode 22 and the lower electrode 52 respectively. The conductive cylinder 25 is provided on another cylinder seat 23. The output rod of the conductive cylinder 25 is threadedly connected to the guide post 231 provided with the conductive upper electrode 26. The lower electrode assembly 5 also includes a conductive lower electrode 53. The conductive upper electrode 26 and the conductive lower electrode 53 are provided for welding and can be electrically connected during welding. The transformer 27 is provided on the upper welding fixing plate 21. The transformer 27 is provided for the steel truss 100 respectively. The conductive plate 232 is electrically connected to the transformer 27.

[0066] In this embodiment, welding cylinders 24 are arranged in pairs, and two welding upper electrodes 22 connected to the two paired welding cylinders 24 simultaneously weld two lower chord ribs 102 on a set of steel trusses 100. The number of cylinder seats 23 and transformers 27 is determined by the number of welding cylinders 24 and conductive cylinders 25 to meet the mechanical installation and electrical connection requirements of the welding upper electrodes 22 and conductive upper electrodes 26. In this embodiment, four welding cylinders 24 are provided, which can simultaneously install two pairs of welding upper electrodes 22, allowing the two pairs of welding upper electrodes 22 to simultaneously weld the transverse ribs 200 on two sets of steel trusses 100. Correspondingly, two conductive cylinders 25 are provided, each with a conductive upper electrode 26 installed, corresponding to a conductive lower electrode 53 to ensure welding operations; two sets of transformers 27 are provided, with each set of transformers 27 corresponding to one set of steel trusses 100. The top end of the guide post 231 is slidably mounted inside the cylinder seat 23. The piston rod of the welding cylinder 24 or the conductive cylinder 25 is threadedly connected to the top end of the guide post 231, enabling the guide post 231 to move up and down. The bottom end of the guide post 231 is connected to a conductive plate 232, on which an electrode rod 233 is vertically fixed for mounting the welding upper electrode 22 or the conductive upper electrode 26. A transformer 27, a conductive upper electrode 26, and a pair of welding upper electrodes 22 are electrically connected as a group, such as... Figure 10The two sets shown are located on the left and right sides respectively. Taking one set as an example, the transformer 27 is provided with a first collector terminal 271 and a second collector terminal. The conductive plate 232 for mounting the conductive upper electrode 26 is connected to the second collector terminal of the transformer 27 through a first wire. In the two conductive plates 232 for mounting a pair of welded upper electrodes 22, the first ends of the two conductive plates 232 are connected through a second wire 274, and the second ends of the two conductive plates 232 are connected to the first collector terminal 271 of the transformer 27 through a third wire 275.

[0067] In some embodiments, the upper welding lateral movement assembly 3 further includes a lateral movement guide assembly 34, which includes a lateral slider 341 and a lateral guide rail 342. One of the lateral slider 341 and the lateral guide rail 342 is disposed on the upper welding fixing plate 21, and the other is disposed on the lateral movement frame 33. The lateral slider 341 and the lateral guide rail 342 are slidably fitted together.

[0068] like Figure 7 The function of the lateral movement guide assembly 34 is to guide and limit the relative movement between the upper welded fixed plate 21 and the lateral frame 33. Combined with... Figure 9 On the upper welding fixing plate 21, two vertical plates 343 are respectively arranged on both sides along the Y direction. The two vertical plates 343 are parallel to each other. Each of the two vertical plates 343 has at least one set of transverse sliders 341 on its opposite inner sidewall. The two sets of transverse sliders 341 are spaced apart along the X direction. Each set includes two transverse sliders 341. Transverse guide rails 342 are respectively provided on the two side walls of the transverse frame 33 along the Y direction. The transverse guide rails 342 extend along the X direction. The transverse sliders 341 on each vertical plate 343 are slidably installed with the transverse guide rails 342 on the corresponding side of the transverse frame 33, so as to guide the two ends of the upper welding fixing plate 21 along the Y direction, thereby ensuring the stability of the upper welding fixing frame moving along the X direction and improving the welding positioning accuracy. The transverse movement guide components 34 are symmetrically arranged on both sides of the upper welding fixing plate 21, so that the guiding force is balanced.

[0069] In some embodiments, the transverse transmission assembly 32 includes a transverse transmission shaft 321, a transverse gear 323, and a transverse rack 324. A transverse support seat 322 is provided at each end of the upper welded fixing plate 21 along the second horizontal direction. The transverse transmission shaft 321 is fixed in the output hole of the transverse drive member 31, and both ends of the transverse transmission shaft 321 are rotatably mounted on the transverse support seat 322. The transverse gear 323 is fixed on the transverse transmission shaft 321, and the transverse transmission shaft 321 can drive the transverse gear 323 to rotate synchronously. The transverse rack 324 is disposed on the transverse frame 33 and extends along the first horizontal direction. The transverse gear 323 and the transverse rack 324 are meshed and connected. When the transverse drive member 31 drives the transverse transmission shaft 321 to rotate, the transverse gear 323 rolls on the transverse rack 324, driving the upper welded fixing plate 21 to move.

[0070] In this embodiment, the horizontal drive component uses a dual-output motor. The middle position of the horizontal transmission shaft 321 is fixed inside the motor's output hole. The horizontal drive component 31 drives the rotational movement of the horizontal transmission shaft 321. Both ends of the horizontal transmission shaft 321 are rotatably mounted within two horizontal support seats 322 for stable support. Bearings can be installed between the horizontal transmission shaft 321 and the horizontal support seats 322 for rotatable mounting. By using a gear and rack assembly at the output end of the horizontal transmission shaft 321 to convert rotational motion into linear motion, installation space is saved, and the linear motion has good reliability. Figure 7 The transverse rack 324 is located below the transverse guide rail 342 on the transverse frame 33. The transverse gear 323 rotates on the transverse rack 324 and drives the upper welded fixing plate 21 to move.

[0071] In some embodiments, the upper welding longitudinal moving assembly 4 further includes a longitudinal moving guide assembly 43, which includes a longitudinal slider 431 and a longitudinal guide rail 432. One of the longitudinal slider 431 and the longitudinal guide rail 432 is disposed on the frame 1 and the other is disposed on the transverse frame 33. The longitudinal slider 431 and the longitudinal guide rail 432 are slidably fitted together.

[0072] like Figure 7 Two sets of longitudinal movement guide components 43 are provided, located at both ends of the transverse frame 33 along the X direction. Each set of longitudinal movement guide components 43 includes two longitudinal movement guide components 43, which are respectively located on both sides of the end of the transverse frame 33 along the Y direction. It can be understood that the transverse frame 33 is a rectangular frame structure. The four longitudinal movement guide components 43 can limit and guide the four apex positions of the transverse frame 33 respectively, resulting in better performance. In this embodiment, the longitudinal guide rail 432 is set on the vertical frame of the transverse frame 33, and one or more longitudinal sliders 431 are set on the frame 1. The longitudinal sliders 431 are slidably installed with the longitudinal guide rail 432.

[0073] In some embodiments, the longitudinal transmission assembly 42 includes a longitudinal transmission shaft 421, a longitudinal gear 423, and a longitudinal rack 424. A longitudinal support seat 422 is provided at each end of the frame 1 along the first horizontal direction. The longitudinal transmission shaft 421 is fixed in the output hole of the longitudinal drive member 41, and both ends of the longitudinal transmission shaft 421 are rotatably mounted on the longitudinal support seat 422. The longitudinal gear 423 is fixed on the longitudinal transmission shaft 421, and the longitudinal transmission shaft 421 can drive the longitudinal gear 423 to rotate synchronously. The longitudinal rack 424 is disposed on the transverse frame 33, extending vertically. The longitudinal gear 423 meshes with the longitudinal rack 424 for transmission. When the longitudinal drive member 41 drives the longitudinal transmission shaft 421 to rotate, the longitudinal gear drives the longitudinal rack 424 to move up and down, thereby driving the transverse frame 33 to move vertically.

[0074] Combination Figure 7 and Figure 8 As shown, in this embodiment, the longitudinal drive component 41 can be a dual-output motor, which is fixed to the frame 1. Of course, to achieve the desired structural layout, the longitudinal drive component 41 can be fixed to the frame 1 via a base; the specific configuration depends on the actual spatial structure, and this embodiment does not impose any limitations. The longitudinal drive component 41 is positioned in the middle of the longitudinal transmission shaft 421, facilitating symmetrical output control of the rotation of the longitudinal transmission shaft 421. The longitudinal transmission shaft 421 is positioned along the X-direction, and the longitudinal rack 424 is positioned vertically. Longitudinal gears 423 are coaxially mounted at both ends of the longitudinal transmission shaft 421, enabling the longitudinal gears 423 to rotate coaxially, thereby driving the longitudinal rack 424 to move vertically. The longitudinal rack 424 then drives the transverse frame 33 to rise and fall. The two longitudinal racks 424 are positioned between the two sets of longitudinal movement guide components 43 on the same side, which facilitates balanced force distribution and stable movement.

[0075] In some embodiments, such as Figure 11 The lower electrode assembly 5 also includes a fixed beam 56 and a lifting cylinder 55. The fixed beam 56 is fixedly mounted on the frame 1. The lifting cylinder 55 is fixed on the fixed beam 56. The piston rod of the lifting cylinder 55 is vertically connected to the movable beam 51. Multiple sets of electrode seats 54 are spaced apart along the first horizontal direction on the movable beam 51. The multiple sets of electrode seats 54 are corresponding to multiple sets of steel trusses 100. Each set of electrode seats 54 is equipped with a welded lower electrode 52 and a conductive lower electrode 53.

[0076] It should be explained that, since the steel truss 100 includes two structural forms: one with a base 101 and the other without, the steel truss 100 is set and positioned on the truss support plate 11. By adjusting the height of the movable beam 51 according to the type of steel truss 100, the position of the welding lower electrode 52 is adapted to the position of the steel truss 100. Simultaneously, the lifting drive component 123 of the positioning assembly 12 is also fixed to the fixed beam 56, saving installation space and allowing for independent control of the lifting position. Figure 11 As shown, the movable beam 51 includes a horizontal plate and side plates connected to the lower ends of the horizontal plate. A lifting plate 124 is located below the horizontal plate. An adjusting rod 125 passes through the movable beam 51 and connects to the positioning block 121. The lifting plate 124 and the movable beam 51 need coordinated control during lifting and lowering to avoid positional interference. In this embodiment, a lifting drive component 123 is provided, fixed in the middle of the fixed beam 56. Both ends of the lifting plate 124 are slidably connected to the fixed beam 56 via guide rods 126 for guidance. Two lifting cylinders 55 are provided, located on both sides of the lifting drive component 123. The output rods of the lifting cylinders 55 pass through clearance holes on the lifting plate 124 and connect to the movable beam 51. The side plates at both ends of the movable beam 51 are slidably installed with guides between them and the frame 1. Six sets of electrode seats 54 are fixed above the movable beam 51, corresponding to six sets of steel trusses 100. A welding lower electrode 52 is connected to each set of electrode seats 54, and the welding lower electrode 52 contacts the welding upper electrode 22 during welding. A conductive lower electrode 53 is also connected to each electrode holder 54, and the conductive lower electrode 53 and the conductive upper electrode 26 make corresponding contact during welding.

[0077] Specifically, the lower electrode assembly 5 also includes a lifting guide assembly 57, which includes a lifting slider 571 and a lifting guide rail 572. One of the lifting slider 571 and the lifting guide rail 572 is mounted on the movable beam 51, and the other is mounted on the fixed beam 56. The lifting slider 571 and the lifting guide rail 572 are slidably mounted together.

[0078] like Figure 11 The lifting slider 571 is mounted on the fixed beam 56, and the lifting guide rail 572 is mounted on the two end side plates of the movable beam 51. The lifting slider 571 and the lifting guide rail 572 are slidably installed together to guide and limit the lifting direction of the movable beam 51.

[0079] In the steel truss mesh welding device provided in this embodiment, the transverse slider 341 and the transverse guide rail 342 are installed with an irregular cross section, the longitudinal slider 431 and the longitudinal guide rail 432 are installed with an irregular cross section, and the lifting slider 571 and the lifting guide rail 572 are installed with an irregular cross section. The irregular cross section includes, but is not limited to, T-shaped or arc-shaped.

[0080] Using the steel truss mesh welding device provided in this embodiment, when N sets of steel trusses 100 are transported to the truss support plate 11 of the welding station 111, 2≤N≤6, and in this embodiment N=6, when making a product of welding steel trusses 100 with base 101 and transverse reinforcement 200, the lifting cylinder 55 drives the movable beam 51 to rise to the first height, and the welding lower electrode 52 rises accordingly; if making a product of welding steel trusses 100 without base 101 and transverse reinforcement 200, the lifting cylinder 55 moves the movable beam 51 to the second height, and the welding lower electrode 52 rises accordingly, so that the welding lower electrode 52 abuts against the lower surface of the lower chord reinforcement 102 of the steel truss 100, and the transverse reinforcement feeding mechanism of the previous process pushes the transverse reinforcement 200 into the positioning groove 122 along the first horizontal direction, and finally the transverse reinforcement 200 can fall onto the upper surface of the lower chord reinforcement 102 when the positioning block 121 descends. The initial position of the upper electrode assembly 2 is at a high position, that is, higher than the highest point after the steel truss 100 is positioned.

[0081] The welding process begins as follows:

[0082] S1, the upper welding transverse moving component 3 is started, driving the upper electrode component 2 to move along the first horizontal direction, so that the welding upper electrode 22 is aligned with the intersection of the lower chord bar 102 and the transverse bar 200 of the first group of steel truss 100.

[0083] S2, the upper welding longitudinal moving component 4 is started, which drives the upper electrode component 2 to move downward in the vertical direction, so that the bottom surface of the welding upper electrode 22 and the conductive upper electrode 26 is higher than the upper chord bar of the steel truss 100. This position is the crossing position.

[0084] S3, the upper welding longitudinal moving component 4 continues to drive the upper electrode component 2 downward, so that the bottom surface of the welding upper electrode 22 and the conductive upper electrode 26 reaches above the horizontal rib 200, and the position without contacting the horizontal rib 200 is the welding position. The welding position is slightly higher than the top of the horizontal rib 200, but without contact.

[0085] S4, the piston rods of welding cylinder 24 and conductive cylinder 25 extend downward, welding upper electrode 22 presses the horizontal rib 200, conductive upper electrode 26 contacts conductive lower electrode 53, transformer 27 works, outputs current, and welds the first group of steel truss 100 to the horizontal rib 200 firmly.

[0086] S5, the piston rods of welding cylinder 24 and conductive cylinder 25 retract, and transformer 27 stops supplying power;

[0087] S6, the upper welding longitudinal moving component 4 is started and drives the upper electrode component 2 to move upward to the crossing position. The upper welding transverse moving component 3 drives the upper electrode component 2 to move laterally (X direction), so that the welding upper electrode 22 is aligned with the intersection of the lower chord bar 102 and the transverse bar 200 of the next set of steel truss 100.

[0088] S7, return to step S1, until N sets of steel trusses 100 are welded, and a steel truss space frame is obtained.

[0089] After the steel truss space frame is cut into pieces, it is ready for the next welding and forming.

[0090] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A welding device for a steel truss space frame, the steel truss space frame comprising a steel truss (100) and transverse reinforcement (200); characterized in that, The steel truss space frame welding device includes: A frame (1) is provided with a truss support plate (11) and a positioning component (12). Multiple sets of steel trusses (100) to be welded are set on the truss support plate (11). Multiple transverse bars (200) are positioned on the positioning component (12). Multiple transverse bars (200) are passed through multiple sets of steel trusses (100) along the first horizontal direction and positioned on the lower chord bar (102) of the steel truss (100). The upper electrode assembly (2) includes an upper welding fixing plate (21) and a welding upper electrode (22). The welding upper electrode (22) is vertically adjustable on the upper welding fixing plate (21) to weld the transverse rib (200) and the steel truss (100). The upper welding lateral moving assembly (3) includes a lateral drive (31), a lateral transmission assembly (32), and a lateral moving frame (33). The output end of the lateral drive (31) is connected to the lateral moving frame (33) through the lateral transmission assembly (32). The lateral drive (31) is disposed on the upper welding fixing plate (21). The lateral drive (31) is configured to drive the upper electrode assembly (2) to move relative to the lateral moving frame (33) along the first horizontal direction, so that the welding upper electrode (22) can move sequentially to multiple welding positions. The upper welding longitudinal moving assembly (4) includes a longitudinal drive (41) and a longitudinal transmission assembly (42). The longitudinal drive (41) is fixed on the frame (1). The output end of the longitudinal drive (41) is connected to the transverse frame (33) through the longitudinal transmission assembly (42) to drive the transverse frame (33) to move relative to the frame (1) in the vertical direction, so that the upper welding electrode (22) can reciprocate between the welding position and the crossing position. The welding position refers to the position above the transverse rib (200) and not in contact with the transverse rib (200). The crossing position refers to the position above the steel truss (100) and not in contact with the steel truss (100). The lower electrode assembly (5) includes a movable beam (51) and a plurality of welding lower electrodes (52). The plurality of welding lower electrodes (52) are spaced apart on the movable beam (51) along the first horizontal direction. The movable beam (51) is located below the positioning assembly (12). The welding lower electrodes (52) are positioned directly opposite the welding points of the transverse reinforcement (200) and the steel truss (100).

2. The steel truss space frame welding device according to claim 1, characterized in that, A welding station (111) is provided on the truss support plate (11) extending along the first horizontal direction. The positioning component (12) is located at the welding station (111). The positioning component (12) includes multiple positioning blocks (121). The multiple positioning blocks (121) and multiple welding lower electrodes (52) are alternately arranged along the first horizontal direction. The positioning blocks (121) are provided with positioning grooves (122). The horizontal ribs (200) are positioned in the multiple positioning grooves (122). The positioning blocks (121) can move up and down along the vertical direction.

3. The steel truss space frame welding device according to claim 1, characterized in that, The upper electrode assembly (2) further includes: A cylinder seat (23) is mounted on the upper welding fixing plate (21). A guide post (231) is slidably arranged inside the cylinder seat (23). The guide post (231) passes through the upper welding fixing plate (21) and is connected in sequence to a conductive plate (232) and an electrode rod (233). The electrode rod (233) is connected to the welding upper electrode (22) or the conductive upper electrode (26). A welding cylinder (24) is mounted on a cylinder seat (23). The output rod of the welding cylinder (24) is threadedly connected to the guide post (231) on which the upper welding electrode (22) is provided. The upper welding electrode (22) and the lower welding electrode (52) are correspondingly arranged to perform welding. A conductive cylinder (25) is mounted on another cylinder seat (23). The output rod of the conductive cylinder (25) is threadedly connected to the guide post (231) on which the conductive upper electrode (26) is mounted. The lower electrode assembly (5) also includes a conductive lower electrode (53). The conductive upper electrode (26) and the conductive lower electrode (53) are correspondingly mounted and can be electrically connected during welding. The transformer (27) is mounted on the upper welding fixing plate (21). The transformer (27) is correspondingly arranged with the steel truss (100). The conductive plate (232) is electrically connected to the transformer (27).

4. The steel truss space frame welding device according to claim 3, characterized in that, The welding cylinders (24) are arranged in pairs, and the two welding electrodes (22) connected to the two welding cylinders (24) in the pair simultaneously weld the two lower chord bars (102) on a set of steel trusses (100).

5. The steel truss space frame welding device according to claim 1, characterized in that, The upper welding transverse moving assembly (3) further includes a transverse moving guide assembly (34), which includes a transverse slider (341) and a transverse guide rail (342). One of the transverse slider (341) and the transverse guide rail (342) is disposed on the upper welding fixing plate (21), and the other is disposed on the transverse moving frame (33). The transverse slider (341) and the transverse guide rail (342) are slidably fitted together.

6. The steel truss space frame welding device according to claim 1, characterized in that, The lateral transmission assembly (32) includes: A transverse drive shaft (321) is provided with a transverse support seat (322) at both ends of the upper welding fixing plate (21) along the second horizontal direction. The transverse drive shaft (321) is fixed in the output hole of the transverse drive member (31). The two ends of the transverse drive shaft (321) are rotatably mounted on the transverse support seat (322). A transverse gear (323) is fixed on the transverse transmission shaft (321), and the transverse transmission shaft (321) can drive the transverse gear (323) to rotate synchronously; A transverse rack (324) is disposed on the transverse frame (33) and extends along the first horizontal direction. A transverse gear (323) meshes with the transverse rack (324) for transmission. When the transverse drive member (31) drives the transverse transmission shaft (321) to rotate, the transverse gear (323) rolls on the transverse rack (324), thereby driving the upper welded fixing plate (21) to move.

7. The steel truss space frame welding device according to claim 1, characterized in that, The upper welding longitudinal moving assembly (4) further includes a longitudinal moving guide assembly (43), which includes a longitudinal slider (431) and a longitudinal guide rail (432). One of the longitudinal slider (431) and the longitudinal guide rail (432) is disposed on the frame (1) and the other is disposed on the transverse frame (33). The longitudinal slider (431) and the longitudinal guide rail (432) are slidably fitted together.

8. The steel truss space frame welding device according to claim 1, characterized in that, The longitudinal transmission assembly (42) includes: A longitudinal drive shaft (421) is provided at both ends of the frame (1) along the first horizontal direction, and a longitudinal support seat (422) is provided at each end. The longitudinal drive shaft (421) is fixed in the output hole of the longitudinal drive member (41), and the two ends of the longitudinal drive shaft (421) are rotatably mounted on the longitudinal support seat (422). A longitudinal gear (423) is fixed on the longitudinal transmission shaft (421), and the longitudinal transmission shaft (421) can drive the longitudinal gear (423) to rotate synchronously; A longitudinal rack (424) is disposed on the transverse frame (33) and extends along the vertical direction. A longitudinal gear (423) meshes with the longitudinal rack (424) for transmission. When the longitudinal drive member (41) drives the longitudinal transmission shaft (421) to rotate, the longitudinal gear drives the longitudinal rack (424) to move up and down, thereby driving the transverse frame (33) to move along the vertical direction.

9. The steel truss space frame welding device according to claim 1, characterized in that, The lower electrode assembly (5) also includes: A fixed beam (56) is fixedly mounted on the frame (1); A lifting cylinder (55) is fixed on the fixed beam (56). The piston rod of the lifting cylinder (55) is vertically connected to the movable beam (51). Multiple sets of electrode seats (54) are arranged at intervals along the first horizontal direction on the movable beam (51). The multiple sets of electrode seats (54) are arranged corresponding to multiple sets of steel trusses (100). Each set of electrode seats (54) is provided with a welding lower electrode (52) and a conductive lower electrode (53).

10. The steel truss space frame welding device according to claim 9, characterized in that, The lower electrode assembly (5) further includes a lifting guide assembly (57), which includes a lifting slider (571) and a lifting guide rail (572). One of the lifting slider (571) and the lifting guide rail (572) is disposed on the movable beam (51), and the other is disposed on the fixed beam (56). The lifting slider (571) and the lifting guide rail (572) are slidably installed together.

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