Positioning welding equipment for assembling a shelf

Abstract

This invention relates to the field of welding equipment technology, and more particularly to a positioning welding device for assembling a shelf, comprising a welding table, a mechanical welding arm for welding the shelf mounted on the outer side of the welding table, and a clamping assembly for fixing the shelf, including two sets of clamping plates, a displacement chamber, a motor, a bidirectional screw, and a guide rod. Both sets of clamping plates are disposed inside the displacement chamber, and the motor is mounted on the outer side of the displacement chamber. This invention achieves automatic lifting and flipping of the workpiece through the linkage of the lifting and rotating components. Lifting the workpiece before flipping it effectively avoids the welding table and prevents collisions. The entire flipping process requires no disassembly or secondary clamping, ensuring positioning accuracy and operational continuity. During flipping, welding slag is effectively removed under gravity and vibration, improving the quality of subsequent welds. The initial low-position design also facilitates workpiece loading, unloading, and alignment, significantly improving the automation level of the welding operation.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a positioning welding device for assembling a shelf. Background Technology

[0002] A shelving unit is a storage device widely used in homes, warehouses, shopping malls, garages and other scenarios. It is usually assembled into a frame structure by welding, bolting or snapping together multiple metal profiles, and is used to store items in layers. Its structure generally includes basic components such as columns, beams and shelf supports.

[0003] In the welding and assembly of metal frames for shelving units, after welding one side of the uprights and crossbeams, it is often necessary to flip the workpiece over to weld the other side. However, this flipping operation brings two problems: First, the workpiece clamps need to be loosened, which can easily cause the positioned components to shift, affecting the assembly accuracy; second, welding slag that falls off during the flipping process may become embedded in the joint gaps, forming inclusions and damaging the fusion quality and connection strength of subsequent welds. Therefore, this application proposes a positioning welding device for assembling shelving units. Summary of the Invention

[0004] The purpose of this invention is to address the problems in the prior art, such as the tedious workpiece flipping process and the easy embedding of welding slag in the joint gaps, by proposing a positioning welding device for assembling a shelf.

[0005] The technical solution of the present invention: A positioning welding device for assembling a storage rack, comprising a welding table, wherein a mechanical welding arm for welding the storage rack is mounted on the outer side of the welding table, and further comprising: A clamping assembly for fixing a shelf includes two sets of clamping plates, a displacement chamber, a motor, a bidirectional screw, and a guide rod. Both sets of clamping plates are disposed inside the displacement chamber. The motor is installed on the outside of the displacement chamber. The bidirectional screw is drivenly connected to the output end of the motor. The end of the bidirectional screw away from the motor is rotatably connected to the inner wall of the displacement chamber. Both ends of the bidirectional screw are threadedly connected to the two sets of clamping plates respectively. The guide rod is fixed to the inner wall of the displacement chamber and slides through the two sets of clamping plates. The anti-touch flipping mechanism includes a lifting component and a rotating component, wherein: The lifting component is connected to the displacement chamber and is used to drive the clamping component to lift and lower. The rotating component is connected to the lifting component and is used to drive the clamping component to flip over when the lifting mechanism is running. A locking mechanism, connected to the rotating assembly, is used to lock the position of the workpiece.

[0006] Optionally, the lifting assembly includes a hydraulic cylinder, a connecting block, a rotating rod, two sets of side plates, a second guide rod, and a top plate. The hydraulic cylinder is installed inside the welding table. The connecting block is drivenly connected to the output end of the hydraulic cylinder. The rotating rod is rotatably connected inside the connecting block and fixedly connected to the outside of the displacement chamber. The two sets of side plates are respectively fixedly connected to both ends of the connecting block. The second guide rod slides through the two sets of side plates and is fixedly connected to the top of the welding table. The top plate is fixedly connected to the top of the two sets of second guide rods.

[0007] Optionally, the rotating assembly includes a spur gear and a rack, the spur gear being fixed to the outside of the rotating rod, and the rack being fixed between the welding table and the top plate.

[0008] Optionally, the locking mechanism includes a linkage plate, a fixed plate, a spring, and two sets of limiting rods. The linkage plate is fixed to the outside of the rotating rod, the fixed plate is fixed to the outside of the connecting block, the two ends of the spring are respectively sleeved on the outside of the linkage plate and the fixed plate, and both sets of limiting rods are fixed to the end of the connecting block near the linkage plate.

[0009] Optionally, a limiting mechanism is provided around the periphery of both sets of clamps, the limiting mechanism being used to restrict the vertical position of the shelf.

[0010] Optionally, the limiting mechanism includes two sets of limiting plates, transmission rods, and a second spring. The two sets of limiting plates are arranged in a cross configuration. A connecting rod is rotatably connected inside the two sets of limiting plates. The connecting rod is fixed to the outside of the clamping plate. The transmission rods are respectively fixed inside the two ends of the two sets of limiting plates. The second spring is sleeved between each pair of adjacent transmission rods.

[0011] Optionally, a friction ring, which is a rubber ring, is fixed to the outer side of the transmission rod.

[0012] Optionally, a storage box is slidably connected to the top of the welding station, and a storage groove is provided on the top of the storage box.

[0013] Optionally, a scraper is slidably connected inside the storage slot, and two sets of fixing rods slide through the inside of the storage box, with both sets of fixing rods being fixedly connected to the scraper.

[0014] Optionally, a pull plate is fixed to the end of each of the two sets of fixing rods away from the scraper.

[0015] Compared with the prior art, this application includes at least one of the following beneficial technical effects: This invention achieves automatic lifting and flipping of the workpiece through the linkage of the lifting and rotating components. The lifting of the workpiece before flipping it can effectively avoid the welding table and prevent collisions. The entire flipping process does not require disassembly or secondary clamping, ensuring positioning accuracy and operational continuity. During flipping, welding slag can be effectively removed under the action of gravity and vibration, improving the quality of subsequent welds. The initial low-position design also facilitates the picking, placing, and positioning of the workpiece, significantly improving the automation level of the welding operation.

[0016] Furthermore, through the structural design of the locking mechanism, the workpiece can be locked in a processing position parallel to the welding table after it is flipped over, ensuring welding accuracy. The impact vibration generated at the moment of locking can effectively shake off the attached welding slag, preventing it from embedding into the weld and affecting quality. At the same time, it can partially release the residual welding stress, which helps to reduce the workpiece deformation and cracking tendency. This design combines the functions of positioning and locking, welding slag cleaning and stress relief, improving process quality and reliability. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a positioning welding device for assembling a shelf; Figure 2 A partial structural schematic diagram of a positioning welding device for assembling a shelf; Figure 3 This is a cross-sectional schematic diagram of the displacement chamber; Figure 4 This is a cross-sectional view of the welding station; Figure 5 This is a schematic diagram of the structure of a spur gear and a rack. Figure 6 This is a structural diagram of the linkage plate and spring one; Figure 7 This is a schematic diagram of the structure of spring two and the friction ring; Figure 8 This is a schematic diagram of the scraper and pull plate.

[0018] Reference numerals: 1. Welding table; 2. Mechanical welding arm; 3. Clamping plate; 4. Displacement chamber; 5. Motor; 6. Bidirectional screw; 7. Guide rod one; 8. Hydraulic cylinder; 9. Connecting block; 10. Rotating rod; 11. Side plate; 12. Guide rod two; 13. Top plate; 14. Spur gear; 15. Rack; 16. Linkage plate; 17. Fixing plate; 18. Spring one; 19. Limiting rod; 20. Limiting plate; 21. Transmission rod; 22. Spring two; 23. Friction ring; 24. Storage box; 25. Storage slot; 26. Scraper; 27. Fixing rod; 28. Pulling plate. Detailed Implementation

[0019] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, 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, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 - Figure 3 As shown, the present invention proposes a positioning welding device for assembling a storage rack, including a welding table 1. A mechanical welding arm 2 for welding the storage rack is installed on the outer side of the welding table 1. The welding table 1 supports the mechanical welding arm 2. The mechanical welding arm 2 is existing technology and is mature. In this embodiment, it is used to automatically weld workpieces (workpieces refer to the uprights and beams in the storage rack), which will not be elaborated further. The positioning welding device also includes a clamping assembly for fixing the storage rack, including two sets of clamping plates 3, a displacement chamber 4, a motor 5, a bidirectional screw 6, and a guide rod 7. The clamping assembly is described in detail below: Both sets of clamping plates 3 are installed inside the displacement chamber 4. First, the two sets of columns are placed between the two sets of clamping plates 3, and then the crossbeam is placed between the two sets of columns. The motor 5 is installed on the outside of the displacement chamber 4. At this time, the motor 5 is started, and the bidirectional screw 6 is driven by the output end of the motor 5. When the motor 5 runs, it will drive the bidirectional screw 6 to rotate. The end of the bidirectional screw 6 away from the motor 5 is rotatably connected to the inner wall of the displacement chamber 4. The two ends of the bidirectional screw 6 are respectively threadedly connected to the two sets of clamping plates 3. When the bidirectional screw 6 rotates, because the threads at both ends are opposite, the bidirectional screw 6 will drive... The two sets of clamping plates 3 move synchronously in different directions. When the two sets of clamping plates 3 move towards each other, they will apply a compressive force to the column. When the two sets of columns are under force, they will simultaneously compress the crossbeam located between the two sets of columns, thereby achieving the purpose of compressing and positioning the column and the crossbeam. The guide rod 7 is fixed to the inner wall of the displacement chamber 4 and slides through the two sets of clamping plates 3. The guide rod 7 can guide the movement of the clamping plates 3, so that it moves stably in the preset direction. Then, the connection between the clamped column and the crossbeam can be welded by the mechanical welding arm 2.

[0023] As one implementation method, such as Figure 3 - Figure 6 As shown, the positioning welding equipment also includes an anti-touch flipping mechanism, which comprises a lifting assembly and a rotating assembly. The lifting assembly is connected to the displacement chamber 4 and is used to drive the clamping assembly to rise and fall. After welding is completed at one side of the connection between the column and the beam, the lifting assembly can drive the displacement chamber 4 to rise. When the displacement chamber 4 rises, it can drive the clamping plate 3 to rise via the bidirectional screw 6 and guide rod 7. The rise of the clamping plate 3 will eventually drive the column and beam, which are now welded on one side, to rise synchronously. The rotating assembly is connected to the lifting assembly and is used to drive the clamping assembly to flip when the lifting mechanism is running. After the column and beam have risen a certain distance, the rotating assembly will be triggered to operate. The lifting assembly drives the displacement chamber 4 to rotate and flip. Finally, the displacement chamber 4, through the bidirectional screw 6, guide rod 7, and clamping plate 3, drives the column and crossbeam to flip synchronously. During the flipping process, the welding slag at the connection between the column and crossbeam falls off under the action of gravity. After the flipping is complete, the mechanical welding arm 2 can weld the other side of the column and crossbeam. Through the above structural design, the column and crossbeam are close to the welding table 1 in the initial state, so that the staff can check and pick them up. When the column and crossbeam are flipped, they will rise a certain distance first, thereby avoiding the column and crossbeam from colliding with the welding table 1 during the flipping process. This achieves the function of flipping without secondary fixing of the workpiece.

[0024] Furthermore, such as Figure 5 and Figure 6As shown, the positioning welding equipment also includes a locking mechanism connected to the rotating assembly to lock the position of the workpiece. After the rotating assembly drives the column and crossbeam to flip, the locking mechanism restricts the position of the workpiece, ensuring that the column and crossbeam are parallel to the top of the welding table 1, so as to facilitate the processing of the mechanical welding arm 2. When the locking mechanism is running, it also applies a vibration force to the lifting assembly, which ultimately transmits the vibration force to the column and crossbeam through the clamping assembly. At this time, the welding slag at the connection between the column and crossbeam will be further shaken off under the action of the vibration force, thereby effectively preventing the welding slag from embedding into the joint gap. In addition, the vibration force can also release the welding residual stress and reduce the tendency of deformation and cracking.

[0025] As one implementation method, such as Figure 3 , Figure 5 and Figure 6 As shown, the lifting assembly includes a hydraulic cylinder 8, a connecting block 9, a rotating rod 10, two sets of side plates 11, a guide rod 12, and a top plate 13. The lifting assembly is described in detail below: The hydraulic cylinder 8 is installed inside the welding table 1. The connecting block 9 is connected to the output end of the hydraulic cylinder 8. As a prior art technology, the output end of the hydraulic cylinder 8 extends during operation, subsequently controlling the connecting block 9 to move upward. The rotating rod 10 is rotatably connected inside the connecting block 9. The upward movement of the connecting block 9 will drive the rotating rod 10 to move upward synchronously. The rotating rod 10 is fixedly connected to the outer side of the displacement chamber 4. The upward movement of the rotating rod 10 will drive the displacement chamber 4 to move upward. The upward movement of the displacement chamber 4 will ultimately drive the workpiece to move upward through the bidirectional screw 6, guide rod 7, and clamping plate 3. The two sets of side plates 11 are respectively fixed... Connected to both ends of the connecting block 9, the second guide rod 12 slides through the two sets of side plates 11 respectively. When the connecting block 9 moves up and down, it will move stably along the outside of the second guide rod 12 through the side plates 11, avoiding wobbling during movement. The second guide rod 12 is fixed to the top of the welding table 1, which supports the position of the second guide rod 12. The top plate 13 is fixed to the top of the two sets of the second guide rod 12. The top plate 13 can enhance the connection between the tops of the two sets of the second guide rod 12, thereby avoiding the instability of the second guide rod 12 relying solely on the welding table 1 for support.

[0026] Furthermore, such as Figure 3 , Figure 5 and Figure 6 As shown, the rotating assembly includes a spur gear 14 and a rack 15. The rotating assembly is described in detail below: The spur gear 14 is fixed to the outside of the rotating rod 10. When the rotating rod 10 moves, it will drive the spur gear 14 to move synchronously. The rack 15 is fixed between the welding table 1 and the top plate 13. After the rotating rod 10 rises a certain distance, the spur gear 14 will mesh with the rack 15. Since the position of the rack 15 is fixed, when the rotating rod 10 continues to rise, the rack 15 will drive the spur gear 14 to rotate. The rotation of the spur gear 14 will drive the rotating rod 10 to rotate. The rotation of the rotating rod 10 will drive the displacement chamber 4 to rotate and flip. The rotation of the displacement chamber 4 will eventually drive the workpiece to rotate and flip through the bidirectional screw 6, the guide rod 7 and the clamping plate 3, so that the mechanical welding arm 2 can perform welding processing on the other side of the workpiece.

[0027] Furthermore, such as Figure 3 , Figure 5 and Figure 6 As shown, the locking mechanism includes a linkage plate 16, a fixing plate 17, a spring 18, and two sets of limiting rods 19. The locking mechanism is described in detail below: The linkage plate 16 is fixed to the outside of the rotating rod 10. When the rotating rod 10 rotates, it synchronously drives the linkage plate 16 to rotate. Both sets of limiting rods 19 are fixed to the end of the connecting block 9 near the linkage plate 16. In the initial state, the linkage plate 16 and a set of limiting rods 19 are in contact. At this time, the displacement chamber 4 and the top of the welding table 1 are parallel. When the rotating rod 10 drives the linkage plate 16 to rotate, the linkage plate 16 will rotate and disengage from the contact with the limiting rods 19. The fixing plate 17 is fixed to the outside of the connecting block 9. The two ends of the spring 18 are respectively sleeved on the outside of the linkage plate 16 and the fixing plate 17. When the linkage plate 16 rotates, it will also cooperate with the fixing plate 17 to pull the spring 18, causing the spring 18 to deform under force and generate elastic potential energy. When the rotating rod 10 rotates more than 90 degrees... °, and after the spur gear 14 disengages from the rack 15, the spring 18 will instantly release its elastic potential energy, pulling the linkage plate 16 to strike another set of limit rods 19. When the linkage plate 16 and the other set of limit rods 19 are in contact, the clamping plate 3 just drives the workpiece to flip over and the workpiece is parallel to the top of the welding table 1. At this time, the mechanical welding arm 2 can process the other side of the workpiece. When the linkage plate 16 strikes the limit rod 19, the two will vibrate. The linkage plate 16 will then transmit the vibration force to the displacement chamber 4 through the rotating rod 10. The displacement chamber 4 will then transmit the vibration force to the clamping plate 3 through the bidirectional screw 6 and the guide rod 7. Finally, the clamping plate 3 will transmit the vibration force to the workpiece. This vibration force can shake off the welding slag at the workpiece welding point and release the welding residual stress, reducing the tendency of deformation and cracking.

[0028] As one implementation method, such as Figure 7As shown, both sets of clamping plates 3 are provided with limiting mechanisms on their periphery. These limiting mechanisms are used to restrict the vertical position of the shelf. Each limiting mechanism includes two sets of limiting plates 20, a transmission rod 21, and a spring 22. The limiting mechanisms are described in detail below: The two sets of limiting plates 20 are arranged in a cross configuration, and a connecting rod is rotatably connected inside the two sets of limiting plates 20. The connecting rod is fixed to the outside of the clamping plate 3, and the two sets of limiting plates 20 can rotate together along the connecting rod. The transmission rods 21 are respectively fixed inside the two ends of the two sets of limiting plates 20. When the two sets of clamping plates 3 clamp the workpiece, the top and bottom ends of the workpiece are exactly between the two adjacent sets of transmission rods 21. The second spring 22 is sleeved between each pair of adjacent sets of transmission rods 21. At this time, the second spring 22 itself has a spring force of 22. The potential energy will pull the two sets of transmission rods 21 to squeeze towards the workpiece, thereby limiting the top and bottom of the workpiece. Combined with the squeezing and positioning of the clamping plate 3, it enhances the stability of fixing the workpiece. When the two sets of adjacent transmission rods 21 squeeze and fix the workpiece, the two sets of adjacent transmission rods 21 will also drive the two sets of limiting plates 20 to perform a "folding" action (similar to the working principle of scissors). At this time, the other two sets of adjacent transmission rods 21 are also in a squeezing and fixing state on the workpiece, thus fixing both ends of the workpiece at the same time.

[0029] Furthermore, such as Figure 7 As shown, a friction ring 23 is fixedly connected to the outer side of the transmission rod 21. When the transmission rod 21 squeezes the workpiece, it will first drive the friction ring 23 to squeeze the workpiece. The friction ring 23 is a rubber ring. The material of the rubber ring can increase the friction with the workpiece, thereby improving the clamping and fixing effect.

[0030] As one implementation method, such as Figure 2 and Figure 8 As shown, a storage box 24 is slidably connected to the top of the welding table 1. The welding slag produced by the workpiece will fall into the inside of the storage box 24 under the action of gravity. The top of the storage box 24 is provided with a storage groove 25, which is finally stored inside the storage groove 25.

[0031] Furthermore, such as Figure 8As shown, a scraper 26 is slidably connected inside the storage groove 25. In the initial state, the scraper 26 is in contact with the inner wall of the storage groove 25. After a certain amount of welding slag is collected, two sets of fixing rods 27 slide through the inside of the storage box 24. Both sets of fixing rods 27 are fixedly connected to the scraper 26. A pull plate 28 is fixedly connected to the end of the two sets of fixing rods 27 away from the scraper 26. The pull plate 28 can be pulled to move away from the scraper 26. The movement of the pull plate 28 will drive the scraper 26 to move synchronously through the two sets of fixing rods 27. At this time, the scraper 26 will scrape off the welding slag, causing the welding slag to accumulate in one place. The scraper 26 will also squeeze the accumulated welding slag to reduce its footprint.

[0032] In this embodiment, firstly, the worker places the two uprights of the shelf between the two sets of clamping plates 3 and the crossbeam between the two uprights. The motor 5 is started to drive the bidirectional screw 6 to rotate, causing the two sets of clamping plates 3 to move towards each other along the guide rod 7, thereby simultaneously clamping and positioning the uprights and the crossbeam. Subsequently, the mechanical welding arm 2 welds the connection on one side of the workpiece. After welding on one side is completed, the hydraulic cylinder 8 is activated, pushing the connecting block 9 and the internal rotating rod 10 upwards. This, in turn, drives the entire clamping assembly (including the displacement chamber 4 and the workpiece) to rise via the rotating rod 10. During the lifting process, when the spur gear 14 fixed to the rotating rod 10 meshes with the fixed rack 15, the continuous upward motion is converted into the rotational motion of the spur gear 14 and the rotating rod 10, ultimately driving the workpiece to flip over. At the end of the flipping action, the spur gear 14 disengages from the rack 15. At this time, the torn spring 18 releases its elastic potential energy, pulling the linkage plate 16 to violently impact the limiting rod 19. This impact not only achieves precise locking of the position after flipping, ensuring that the workpiece is parallel to the welding table 1, but also transmits the vibration force generated to the workpiece through the structure, effectively shaking off the welding slag and partially releasing the welding stress. After that, the mechanical welding arm 2 can weld the other side of the workpiece. Throughout the process, the falling welding slag is collected by the collection box 24 and can be periodically cleaned by pulling the pull plate 28 to drive the scraper 26. The vertical limiting of the workpiece is completed by the limiting mechanism. The tension of the spring 22 always applies a constraint force to the upper and lower ends of the workpiece through the transmission rod 21 and the friction ring 23, enhancing the clamping stability.

[0033] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A positioning welding device for assembling a shelf, comprising a welding table (1), wherein a mechanical welding arm (2) for welding the shelf is mounted on the outer side of the welding table (1), characterized in that, Also includes: The clamping assembly for fixing the shelf includes two sets of clamping plates (3), a displacement chamber (4), a motor (5), a bidirectional screw (6), and a guide rod (7). The two sets of clamping plates (3) are both located inside the displacement chamber (4). The motor (5) is installed on the outside of the displacement chamber (4). The bidirectional screw (6) is connected to the output end of the motor (5). The end of the bidirectional screw (6) away from the motor (5) is rotatably connected to the inner wall of the displacement chamber (4). The two ends of the bidirectional screw (6) are threadedly connected to the two sets of clamping plates (3) respectively. The guide rod (7) is fixed to the inner wall of the displacement chamber (4) and slides through the two sets of clamping plates (3). The anti-touch flipping mechanism includes a lifting component and a rotating component, wherein: The lifting component is connected to the displacement chamber (4) and is used to drive the clamping component to lift. The rotating component is connected to the lifting component and is used to drive the clamping component to flip when the lifting mechanism is running. A locking mechanism, connected to the rotating assembly, is used to lock the position of the workpiece.

2. The positioning and welding equipment for assembling a shelf according to claim 1, characterized in that, The lifting assembly includes a hydraulic cylinder (8), a connecting block (9), a rotating rod (10), two sets of side plates (11), a second guide rod (12), and a top plate (13). The hydraulic cylinder (8) is installed inside the welding table (1). The connecting block (9) is connected to the output end of the hydraulic cylinder (8). The rotating rod (10) is rotatably connected inside the connecting block (9). The rotating rod (10) is fixed to the outside of the displacement chamber (4). The two sets of side plates (11) are fixed to the two ends of the connecting block (9). The second guide rod (12) slides through the two sets of side plates (11) and is fixed to the top of the welding table (1). The top plate (13) is fixed to the top of the two sets of second guide rods (12).

3. The positioning and welding equipment for assembling a storage rack according to claim 2, characterized in that, The rotating assembly includes a spur gear (14) and a rack (15), the spur gear (14) being fixed to the outside of the rotating rod (10), and the rack (15) being fixed between the welding table (1) and the top plate (13).

4. The positioning and welding equipment for assembling a shelf according to claim 2, characterized in that, The locking mechanism includes a linkage plate (16), a fixing plate (17), a spring (18), and two sets of limiting rods (19). The linkage plate (16) is fixed to the outside of the rotating rod (10), the fixing plate (17) is fixed to the outside of the connecting block (9), the two ends of the spring (18) are respectively sleeved on the outside of the linkage plate (16) and the fixing plate (17), and the two sets of limiting rods (19) are fixed to the end of the connecting block (9) near the linkage plate (16).

5. The positioning and welding equipment for assembling a storage rack according to claim 4, characterized in that, Both sets of clamps (3) are provided with a limiting mechanism on their periphery, which is used to limit the vertical position of the shelf.

6. The positioning and welding equipment for assembling a storage rack according to claim 5, characterized in that, The limiting mechanism includes two sets of limiting plates (20), transmission rods (21) and springs (22). The two sets of limiting plates (20) are arranged in a cross configuration. A connecting rod is rotatably connected inside the two sets of limiting plates (20). The connecting rod is fixed to the outside of the clamping plate (3). The transmission rods (21) are respectively fixed inside the two ends of the two sets of limiting plates (20). The springs (22) are sleeved between each pair of adjacent transmission rods (21).

7. The positioning and welding equipment for assembling a shelf according to claim 6, characterized in that, A friction ring (23) is fixed to the outside of the transmission rod (21), and the friction ring (23) is a rubber ring.

8. The positioning and welding equipment for assembling a shelf according to claim 1, characterized in that, The top of the welding station (1) is slidably connected to a storage box (24), and the top of the storage box (24) is provided with a storage groove (25).

9. The positioning and welding equipment for assembling a shelf according to claim 8, characterized in that, The storage slot (25) is slidably connected to a scraper (26), and the storage box (24) is slidably connected to two sets of fixing rods (27), both sets of fixing rods (27) being fixedly connected to the scraper (26).

10. A positioning welding device for assembling a shelf according to claim 9, characterized in that, The two sets of fixing rods (27) are fixed with a pull plate (28) at the end away from the scraper (26).

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