A flatbed truck reinforcing rib nut special welding machine

Abstract

The technical scheme belongs to the technical field of flat car processing equipment, and particularly relates to a welding machine special for reinforcing rib nuts of flat cars, which comprises a rack and a feeding device, the feeding device is used for bearing and conveying workpieces, a nut feeding device is used for conveying nuts to the feeding device, a nut positioning device is used for positioning the nuts conveyed by the nut feeding device on the workpieces, and a welding device is arranged on the feeding device; the feeding device comprises feeding sliding rails, a feeding sliding table sliding on the feeding sliding rails and a feeding driving element, the feeding sliding table is provided with at least one positioning assembly used for fixing the workpieces, and the feeding driving element drives the feeding sliding table to move between a loading station and a processing station; when the feeding sliding table is at the loading station, the feeding sliding table is prepared with the workpieces, and the positioning assembly is pressed against the workpieces to position the workpieces; when the feeding sliding table is at the processing station, the workpieces receive the nuts conveyed by the nut feeding device and are positioned, and the welding device is used to complete the welding of the nuts, so that the manual intervention link is reduced, and the product quality stability and production efficiency are improved.

Description

Technical Field

[0001] This technical solution relates to the field of flatbed truck processing equipment technology, specifically to a special welding machine for flatbed truck reinforcing rib nuts. Background Technology

[0002] A flatbed truck is an industrial transport vehicle that integrates a cargo platform and a walking mechanism. Its main body is a flatbed, which is often welded with reinforcing ribs to enhance structural rigidity.

[0003] In the existing production process of flatbed trucks, operators first need to weld the reinforcing ribs to the base plate according to the preset layout. Then, they manually pick up the welding nuts and position them one by one into the corresponding predetermined holes in the base plate, and fix them with a handheld spot welding gun. This process not only relies on a lot of manual operation and requires skilled workers, but also has high repetition and high work intensity. The repetitive and monotonous actions can easily lead to physical fatigue and decreased concentration, making it difficult to guarantee the uniformity of quality and resulting in poor production efficiency. Utility Model Content

[0004] This technical solution aims to improve the problems of inconsistent product quality and poor production efficiency caused by the high dependence on manual labor in the production of flatbed trucks. It provides a special welding machine for reinforcing rib nuts of flatbed trucks.

[0005] The purpose of this technical solution is achieved as follows: A special welding machine for reinforcing rib nuts on flatbed trucks, including a frame, and also including... A feeding device, which is installed on the frame, is used to carry and transport workpieces; A nut feeding device is mounted on the frame on one side of the feeding device and is used to feed nuts to the feeding device; A nut positioning device is disposed on one side of the nut feeding device and is used to position the nuts conveyed by the nut feeding device onto the workpiece. A welding device, which is movably mounted on the frame and erected above the feeding device, is used to spot weld nuts to the corresponding positions on the workpiece; The feeding device includes a feeding slide rail, a feeding slide table that slides along the feeding slide rail, and a feeding drive component. The feeding slide table is provided with at least one fixing component for fixing the workpiece. The feeding drive component drives the feeding slide table to move between the loading station and the processing station. When the feeding slide table is in the loading station, the workpiece is prepared on the feeding slide table, and the fixing component presses against the workpiece to position it. When the feeding slide table is in the processing station, the workpiece receives the nut delivered by the nut feeding device and is positioned, and then the welding device is used to complete the welding of the nut.

[0006] Through the above technical solution, a special welding machine for reinforcing rib nuts on a flatbed truck, in its initial state, has a loading slide initially positioned at the loading station. The reinforcing rib workpiece from the flatbed truck is placed on the loading slide by a person or a robot. The fixing component secures the workpiece. Then, the loading drive unit drives the loading slide to move along the loading rail to the processing station. The nut feeding device delivers the nut to its corresponding nut fixing device, where a fixing pin on the upper part of the device passes through the inner hole of the nut for positioning, ensuring accurate orientation. The welding device mounted above automatically spot welds the contact point between the positioned nut and the workpiece. After welding, the loading slide can move to perform secondary or multiple nut welding operations. After welding, the loading slide returns to the loading station to replace the new workpiece and enters the next cycle. Through automated collaborative control of nut delivery and positioning, precise workpiece transfer, and welding operations, manual intervention is reduced, improving product quality stability and production efficiency.

[0007] Preferably, the frame is provided with a plurality of positioning components. Each positioning component includes a base, a positioning drive, and a positioning pin disposed at the output end of the positioning drive. The positioning pin is slidably disposed in the base. The loading slide has a plurality of clearance holes corresponding to the nut installation position. The positioning drive drives the positioning pin to move, so that the positioning pin passes through the clearance holes and the through holes on the workpiece in sequence.

[0008] With the above technical solution, after the reinforcing rib of the flatbed cart is manually placed on the loading slide, the positioning drive drives the positioning pin to slide along the guide hole of the seat, so that it passes through the clearance hole and the pre-made through hole on the workpiece in sequence, forcibly constraining the workpiece in the preset position, eliminating the deviation of manual placement. After the positioning is completed, the positioning drive drives the positioning pin to retract and reset, avoiding mechanical interference with the subsequent movement of the loading slide. At this time, the workpiece is in the correct position, ensuring the accuracy of subsequent nut loading and welding operations, and improving accuracy.

[0009] Preferably, the feeding assembly includes: A material rack is installed on the loading slide; A material-fixing swing arm, which is hinged to the material-fixing frame; A fixed material pressing block is disposed on the fixed material swing rod, the fixed material swing rod has an adjustment groove, the fixed material pressing block is engaged in the adjustment groove, and the fixed material pressing block can be adjusted to different engagement positions along the length direction of the adjustment groove; A first material-fixing cylinder is mounted on the material-fixing frame. The first material-fixing cylinder is used to drive the material-fixing swing arm to swing so as to move the material-fixing pressure block closer to the feeding slide.

[0010] Through the above technical solution, after the positioning component completes the deviation correction of the workpiece position, the material-fixing cylinder drives the material-fixing swing arm to swing around the hinge point, causing the end with the material-fixing pressure block to press down on the workpiece synchronously, so as to stably press the workpiece against the table surface of the feeding slide, so as to ensure that the workpiece will not be deviated due to vibration or inertia during the subsequent movement of the feeding slide, and to ensure the accuracy of subsequent nut feeding and welding operations, further improving accuracy.

[0011] The material clamping block can be adjusted to different clamping positions along the length of the adjustment groove to suit workpieces of different sizes and models, ensuring stable pressure application.

[0012] Preferably, the feeding slide is provided with two stops, which cooperate to limit the opposite ends of the workpiece, and the feeding slide is also provided with a blocking block that matches the groove of the workpiece.

[0013] With the above technical solution, when manually placing the reinforcing rib workpiece on the flatbed cart, the operator places both ends of the workpiece against two pre-set blocks on the loading slide, forming a preliminary lateral mechanical limit. The groove of the workpiece is engaged with the blocking block, further restricting horizontal swing and improving work efficiency.

[0014] Preferably, the frame is provided with a workbench, the workbench is equipped with the feeding device, and the frame has a plurality of operating tables arranged on opposite sides of the workbench. The operating tables are equipped with the nut fixing device, which includes: The second feed cylinder is installed on the side corresponding to the operating table; The fixed material block is located at the output end of the fixed material cylinder two and is movable relative to the operating table; A material-fixing rod is mounted on the material-fixing block. The upper end of the material-fixing rod is fixed with the mounting pin. The material-fixing cylinder drives the material-fixing block to slide, thereby causing the mounting pin to pass through the clearance hole and the through hole on the workpiece in sequence before being exposed.

[0015] With the above technical solution, after the feeding slide moves the workpiece to the welding station and positions it accurately, the second fixed material cylinder drives the fixed material block to slide towards the workpiece, causing the fixed pin to rise vertically, so that it passes through the clearance hole of the operating table and the through hole on the workpiece in sequence and is exposed. The exposed fixed pin head forms a positioning reference, which makes it easy for the nut that is subsequently transported here to be accurately fitted on the fixed pin to determine the position, eliminate the nut placement deviation, and improve the welding accuracy.

[0016] Preferably, the soldering device includes a soldering drive unit disposed on the side of the operating table, a soldering block disposed at the output end of the soldering drive unit, and a welding tube disposed on the soldering block. The welding tube is disposed opposite to the fixed rod. The soldering block is movable relative to the operating table. The soldering drive unit drives the soldering block to move up and down, thereby driving the welding tube to move synchronously and welding the nut onto the workpiece.

[0017] With the above technical solution, after the nut is pre-installed on the workpiece, the nut is positioned on the fixed pin. The solder drive component drives the solder block to move towards the workpiece. Based on the position of the welding tube and the top rod being directly opposite each other, the welding tube approaches the fixed pin on the top rod and spot welds the nut to the workpiece. After the welding operation is completed, the fixed cylinder drives the fixed pin to retract and reset the nut and workpiece, preparing for the next workpiece cycle, thus realizing the welding and fixing of the nut and the workpiece.

[0018] Preferably, the nut feeding device includes a nut vibratory plate for placing nuts, a nut transmission tube, and a nut feeding gun. The nut vibratory plate transmits nuts to the nut feeding gun through the nut transmission tube, and the output end of the nut feeding gun sets the nuts onto the fixed pin.

[0019] Through the above technical solution, the nut vibratory feeder orients and sorts the disordered nuts and outputs them to the nut feeding gun along the nut transmission tube. The nut feeding gun then outputs the nuts one by one to the fixed pin, forming a continuous automated operation flow.

[0020] Preferably, the operating table is slidably connected to the frame via a slide rail structure.

[0021] The above technical solution allows for the adjustment of the distance between the two operating tables along the slide rail according to the different sizes and models of the workpieces, thereby changing the positions of welding, nut feeding, and nut positioning, thus improving applicability and practicality.

[0022] The key and beneficial technical effects of this technical solution compared to existing technologies are: 1. This technical solution uses a feeding device to move the workpiece to the welding station, realizing automatic workpiece transfer. The nut feeding device automatically feeds the nut to the nut fixing device. The nut is precisely positioned at the designated welding location by the fixing pin. The welding device welds the nut to the workpiece, realizing the automation of welding multiple nuts on the reinforcing ribs of the flatbed truck, improving product quality stability and production efficiency.

[0023] 2. This technical solution uses several positioning components on the frame. The positioning drive component in the positioning component drives the positioning pin to move through the workpiece through hole to eliminate manual placement error and achieve accurate and reliable workpiece positioning. After positioning, the positioning pin retracts to ensure interference-free operation of the equipment and ensure the accuracy of subsequent nut welding. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the feeding slide in the loading station in the embodiment; Figure 2 This embodiment Figure 1 Enlarged view of a portion; Figure 3 This is a partially enlarged schematic diagram of the positioning component behind the worktable in the embodiment; Figure 4 This is a schematic diagram of the fit between the material feeding component and the workpiece in the embodiment; Figure 5 This is a schematic diagram of the overall structure of the loading slide in the processing station in this embodiment; Figure 6 This embodiment Figure 5 Enlarged view of a portion; Figure 7 This is a partial cross-sectional view of this embodiment; Figure 8 This embodiment Figure 7 Enlarged view of a portion of the diagram.

[0025] Reference numerals: 1. Frame; 101. Workbench; 102. Operating table; 2. Nut feeding device; 21. Nut vibratory feeder; 22. Nut loading gun; 3. Loading device; 31. Loading slide rail; 32. Loading slide; 33. Loading drive component; 4. Material fixing assembly; 41. Material fixing rack; 42. Material fixing swing arm; 43. Material fixing pressure block; 44. Material fixing cylinder one; 5. Block; 6. Nut fixing device; 601. Fixing pin; 61. Material fixing cylinder two; 62. Material fixing movable block; 63. Material fixing rod; 7. Welding device; 71. Welding drive component; 72. Welding movable block; 73. Welding pipe; 8. Positioning assembly; 81. Base; 82. Positioning drive component; 83. Positioning pin; 9. Clearance hole; 10. Adjustment groove; 11. Stop block; 100. Workpiece. Detailed Implementation

[0026] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0027] Example: See Figure 1 A special welding machine for reinforcing rib nuts of flatbed trucks includes a frame 1, on which a workbench 101 is installed. Two operating tables 102 are symmetrically arranged on each side of the workbench 101 along its length, that is, a total of four operating tables 102 are provided. Each operating table 102 is slidably connected to the frame 1 through a slide rail structure, and its sliding direction is set according to the length direction of the workbench 101. Each operating table 102 is equipped with a nut fixing device 6 and a welding device 7.

[0028] See Figure 2The frame 1 is equipped with a feeding device 3, which includes a feeding slide rail 31, a feeding slide table 32, and a feeding drive component 33. The feeding slide rail 31 is fixedly installed on the worktable 101, and its length direction is parallel to the length direction of the worktable 101. The feeding slide table 32 is slidably connected to the feeding slide rail 31 and can reciprocate precisely and smoothly along the slide rail. The feeding drive component 33 is preferably a motor, which is installed at the end of the feeding slide rail 31. The feeding drive component 33 drives the feeding slide table 32 to move between the loading station and the processing station through its output end. Figure 2 The loading slide 32 is in the loading position, at which time the operator or robotic arm can load the workpiece 100 (i.e., the reinforcing rib) onto the loading slide 32.

[0029] See Figure 3 and Figure 4 The loading slide 32 is provided with at least one blocking block 5, which is fixed to the upper end face of the loading slide 32 by bolts. The workpiece shown in this embodiment is C-shaped, that is, it has an open sinking groove, and the opposite sides of the sinking groove opening extend outward symmetrically with edges. The size of the blocking block 5 matches the sinking groove. During the workpiece loading process, the sinking groove is aligned with the position of the blocking block 5 and fitted. The blocking block 5 will form a surface contact with the inner walls of the opposite sides of the sinking groove in the horizontal direction to resist and restrict the swing of the workpiece along the X-axis direction.

[0030] The loading slide 32 is also provided with two stops 11, which are bolted to the upper end face of the loading slide 32. There is a span space between the two stops 11 that is adapted to the length of the workpiece. The blocking blocks 5 are arranged between the two stops 11. The shape of the stops 11 is adapted to the cross-sectional shape of the workpiece. When the workpiece is mounted on the blocking blocks 5, the stops 11 on both sides cooperate to block the movement of the workpiece along the length direction, forming a preliminary lateral mechanical limit to restrict the movement of the workpiece along the Y-axis when the loading slide 32 moves, thereby further improving the stability of the workpiece.

[0031] The feeding slide 32 is equipped with a material fixing component 4. In this embodiment, two material fixing components 4 are shown, arranged at intervals corresponding to the sliding direction of the feeding slide 32. Each material fixing component 4 includes a material fixing frame 41, a material fixing swing rod 42, a material fixing block 43, and a material fixing cylinder 44. The material fixing frame 41 is bolted to the feeding slide 32. The material fixing swing rod 42 includes several swing rod structures, one end of which is hinged to the output end of the material fixing cylinder 44. The material fixing cylinder 44 is fixed to the rear side of the material fixing frame 41. The other end of the material fixing swing rod 42 is equipped with a material fixing block 43, which is detachably connected to the material fixing swing rod 42. The upper part of the fixed material swing rod 42 has an adjustment groove 10. The fixed material pressure block 43 is engaged in the adjustment groove 10 and moves along the groove to change its position. In this embodiment, the upper part of the fixed material pressure block 43 has a threaded structure. The lower part of the fixed material pressure block 43 is larger than the groove width of the adjustment groove 10. The nut is tightened and connected to the threaded structure to fix the fixed material pressure block 43 on the adjustment swing rod. The fixed material cylinder 44 drives the fixed material swing rod 42 to swing. The fixed material swing rod 42 drives the fixed material pressure block 43 to press against the upper end face of the workpiece. Multiple fixed material components 4 cooperate to form multi-point pressing and positioning, thereby blocking the movement of the workpiece along the Z-axis direction and further improving the stability of the workpiece.

[0032] Four nuts need to be welded to each end of the workpiece. Specifically, two nuts are symmetrically welded to each of the opposite sides of each end of the workpiece, for a total of eight nuts. The workpiece has through holes corresponding to the nut installation positions, and the loading slide 32 has clearance holes 9 corresponding to each through hole. The worktable 101 has several positioning components 8, with the positions of the positioning components 8 corresponding to the positions of the clearance holes 9. Each positioning component 8 includes a base 81, a positioning drive 82, and a positioning pin 83. The base 81 is fixedly installed on the lower end face of the worktable 101, and the positioning drive 82 is installed on the base 81 away from the workpiece. On one side of the worktable 101, a positioning pin 83 is set at the output end of the positioning drive 82. It slides through the base 81 and is aligned with the corresponding clearance hole 9. The positioning drive 82 drives the positioning pin 83 to move up and down. The positioning pin 83 moves upward and passes through the clearance hole 9 and the through hole in sequence, forcibly constraining the workpiece in the preset position, eliminating the deviation of manual placement. After positioning is completed, the positioning drive 82 drives the positioning pin 83 to exit and reset, avoiding mechanical interference with the movement of the subsequent feeding slide 32. At this time, the workpiece is in the correct position, ensuring the accuracy of subsequent nut feeding and welding operations, and improving accuracy.

[0033] See Figure 5 and Figure 6The loading slide 32 carries the workpiece to the processing station. The nut fixing device 6 includes a fixing cylinder 61, a fixing block 62, and a fixing rod 63. The fixing cylinder 61 is fixed on the side of the corresponding operating table 102 near the loading slide 32. The fixing block is located above the fixing cylinder 61 and is connected to the output end of the fixing cylinder 61. It is movable relative to the operating table 102. The fixing rod 63 is fixed on the outside of the fixing block 62 away from the operating table 102. The upper end of the fixing rod 63 is fixed with a fixing pin 601. The fixing pin 601 has an annular arc surface, which makes the upper part of the fixing pin 601 gradually narrow outward. The fixing cylinder 61 drives the fixing block 62 to move upward. The fixing block 62 drives the fixing rod 63 to move synchronously, so that the fixing pin 601 passes through the clearance hole 9 and the through hole in sequence and is exposed on the workpiece.

[0034] It also includes several nut feeding devices 2, each including a nut vibrating plate 21, a nut conveying pipe, and a nut feeding gun 22. Each of the several nut feeding devices 2 corresponds to a certain number of nut fixing devices 6. The nut vibrating plate 21 is installed on the side of the frame 1 and is used to place and output nuts. The two ends of the nut conveying pipe are respectively connected to the nut vibrating plate 21 and the nut feeding gun 22. The nut feeding gun 22 is mounted on the frame 1. The nut vibrating plate 21 feeds out nuts one by one. Each nut is fed along the nut conveying pipe. After the output end of the nut feeding gun 22 approaches the corresponding positioning pin 83, the nut is fitted onto the positioning pin 83, completing the feeding.

[0035] Each soldering device 7 includes a solder drive 71, a solder block 72, and a welding tube 73. The solder drive 71 is fixed to the side of the corresponding operating table 102 near the loading slide 32. The solder block 72 is located below the solder drive 71, connected to the output end of the solder drive 71, and is movable relative to the operating table 102. The moving direction of the solder block 72 is parallel to the stationary block 62. The welding tube 73 is fixedly installed on the side of the solder block 72 away from the operating table 102. The welding tube 73 is positioned directly opposite the stationary rod 63. The solder drive 71 drives... The movable welding block 72 moves up and down, causing the welding tube 73 to move synchronously closer to the fixed rod 63. The welding tube 73 abuts against the nut and welds it to the workpiece. After the welding is completed, the welding tube 73 returns to its original position, and the fixed rod 63 returns to its original position. At this time, the welding of four nuts on the workpiece is completed. The feeding drive 33 drives the feeding slide 32 to move, moving the other nuts to be installed into the processing station for a second spot welding process, completing the welding of eight nuts. Alternatively, the position of the operating table 102 can be moved according to the actual application scenario of the workpiece to accommodate different types of workpieces.

[0036] The specific work process of this plan is as follows: This technical solution involves manually or robotically placing the reinforcing rib workpiece from a flatbed cart onto the loading slide 32. The positioning component 4 secures the workpiece, and then the loading drive 33 drives the loading slide 32 along the loading rail 31 to the processing station. The nut feeding device 2 delivers the nut to its corresponding nut positioning device 6, where the positioning pin 601 on the upper part of the device passes through the inner hole of the nut for positioning, ensuring accurate posture. The welding device 7 mounted above automatically spot welds the positioned nut to the contact point between the nut and the workpiece. After welding, the loading slide 32 can move to perform secondary or multiple nut welding operations. After welding, the loading slide 32 returns to the loading station to replace the new workpiece and enters the next cycle. Through automated collaborative control of nut delivery and positioning, precise workpiece transfer, and welding operations, manual intervention is reduced, improving product quality stability and production efficiency.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A special welding machine for reinforcing rib nuts on flatbed trucks, comprising a frame (1), characterized in that: Also includes The feeding device (3) is installed on the frame (1) and is used to carry and transport the workpiece; Nut feeding device (2), which is set on the frame (1) on one side of the feeding device (3), is used to feed nuts to the feeding device; Nut positioning device (6), which is disposed on one side of the nut feeding device (2), is used to position the nuts conveyed by the nut feeding device (2) on the workpiece; The welding device (7) is movably mounted on the frame (1) and mounted above the feeding device (3) for spot welding nuts to the corresponding positions on the workpiece (100); The feeding device (3) includes a feeding slide rail (31), a feeding slide table (32) that slides on the feeding slide rail (31), and a feeding drive (33). The feeding slide table (32) is provided with at least one fixing component (4) for fixing the workpiece. The feeding drive (33) drives the feeding slide table (32) to move between the loading station and the processing station. When the feeding slide table (32) is in the loading station, the workpiece is prepared on the feeding slide table (32), and the fixing component (4) presses against the workpiece for positioning. When the feeding slide table (32) is in the processing station, the workpiece receives the nut conveyed by the nut feeding device (2) and is positioned, and then the welding device (7) is used to complete the welding of the nut.

2. The special welding machine for reinforcing rib nuts of a flatbed truck according to claim 1, characterized in that: The frame (1) is provided with a plurality of positioning components (8). The positioning components (8) include a base (81), a positioning drive (82), and a positioning pin (83) disposed at the output end of the positioning drive (82). The positioning pin (83) slides through the base (81). The loading slide (32) has a plurality of clearance holes (9) corresponding to the nut installation position. The positioning drive (82) drives the positioning pin (83) to move, so that the positioning pin (83) passes through the clearance hole (9) and the through hole on the workpiece in sequence.

3. The special welding machine for reinforcing rib nuts of a flatbed truck according to claim 1, characterized in that: The feeding assembly (4) includes: A fixed material rack (41) is installed on the loading slide (32); The material-fixing swing arm (42) is hinged to the material-fixing frame (41); A fixed material pressing block (43) is disposed on the fixed material swing rod (42), the fixed material swing rod (42) has an adjustment groove (10), the fixed material pressing block (43) is engaged in the adjustment groove (10), and the fixed material pressing block (43) can be adjusted to different engagement positions along the length direction of the adjustment groove (10); A material-fixing cylinder (44) is installed on the material-fixing frame (41). The material-fixing cylinder (44) is used to drive the material-fixing swing arm (42) to swing so as to drive the material-fixing pressure block (43) to approach the feeding slide (32).

4. The special welding machine for reinforcing rib nuts of flatbed trucks according to claim 1, characterized in that: The loading slide (32) is provided with two stops (11), which cooperate to limit the opposite ends of the workpiece. The loading slide (32) is also provided with a stop block (5) that is adapted to the groove of the workpiece.

5. A special welding machine for reinforcing rib nuts on a flatbed truck according to claim 2, characterized in that: The frame (1) is provided with a workbench (101), and the feeding device (3) is installed on the workbench (101). The frame (1) has a plurality of operating tables (102) arranged on opposite sides of the workbench (101). The nut fixing device (6) is installed on the operating table (102). The nut fixing device (6) includes: The second feed cylinder (61) is installed on the side corresponding to the operating table (102); The fixed material block (62) is located at the output end of the fixed material cylinder (61) and is movable relative to the operating table (102); A material fixing rod (63) is set on the material fixing block (62). A fixing pin (601) is fixed at the upper end of the material fixing rod (63). The material fixing cylinder (61) drives the material fixing block (62) to slide, so as to drive the fixing pin (601) to pass through the relief hole (9) and the through hole on the workpiece in sequence and then be exposed.

6. A special welding machine for reinforcing rib nuts on a flatbed truck according to claim 5, characterized in that: The soldering device (7) includes a soldering drive (71) disposed on the side of the operating table (102), a soldering block (72) disposed at the output end of the soldering drive (71), and a welding tube (73) disposed on the soldering block (72). The welding tube (73) is disposed opposite to the fixed rod (63). The soldering block (72) is movable relative to the operating table (102). The soldering drive (71) drives the soldering block (72) to move up and down, thereby driving the welding tube (73) to move synchronously and weld the nut onto the workpiece.

7. A special welding machine for reinforcing rib nuts on flatbed trucks according to claim 1 or 5, characterized in that: The nut feeding device (2) includes a nut vibratory plate (21) for placing nuts, a nut transmission pipe and a nut feeding gun (22). The nut vibratory plate (21) transmits nuts to the nut feeding gun (22) through the nut transmission pipe. The output end of the nut feeding gun (22) is fitted with a nut to a fixed pin (601).

8. A special welding machine for reinforcing rib nuts on a flatbed truck according to claim 5, characterized in that: The operating table (102) is slidably connected to the frame (1) via a slide rail structure.

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