Multi-station automatic welding machine based on self-circulation transmission line

Abstract

The utility model discloses a multi-station automatic welding machine based on a self-circulation transmission line. The multi-station automatic welding machine comprises an installation bottom plate, a transmission device installed on the installation bottom plate, a welding installation frame arranged on one side of the transmission device and a plurality of welding devices installed on the welding installation frame. And the welding device comprises a welding X-axis translation mechanism mounted at the top of the welding mounting frame, a welding Y-axis translation mechanism connected with the welding X-axis translation mechanism, a welding ZR-axis mechanism connected with the welding Y-axis translation mechanism, and a welding mechanism connected with the welding ZR-axis mechanism. According to the utility model, multi-type point location welding can be realized, the automation degree is high, the working efficiency is high, meanwhile, the carrier can be recycled, the loading and unloading time can be reduced, the production process can be accelerated, the overall operation smoothness can be improved, the labor cost can be saved, and the practicability is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic welding, in particular to a multi-station automatic welding machine based on a self-circulating transmission line. Background Art

[0002] The existing soldering machines are mainly used for welding single-type welding points (that is, they can only handle single-type welding tasks, lacking flexibility and adaptability), and usually require manual loading and unloading operations. This working mode not only has low efficiency, but also cannot meet the requirements of modern manufacturing for high efficiency and automation. At the same time, the carriers used in the loading and unloading process cannot be recycled, the operation is cumbersome, which also limits the production efficiency and is difficult to meet the needs of large-scale production. Content of the Utility Model

[0003] The purpose of the utility model is to provide a multi-station automatic welding machine based on a self-circulating transmission line. This welding machine can realize multi-type point welding, has a high degree of automation and high working efficiency. At the same time, the carrier can be recycled, which can reduce the loading and unloading time, speed up the production process, improve the overall operation fluency, and can save labor costs, with strong practicability.

[0004] To achieve the above purpose, the following technical solutions are adopted:

[0005] A multi-station automatic welding machine based on a self-circulating transmission line includes a mounting base plate, a transmission device mounted on the mounting base plate, a welding mounting frame arranged on one side of the transmission device, and a plurality of welding devices mounted on the welding mounting frame; the welding device includes a welding X-axis translation mechanism mounted on the top of the welding mounting frame, a welding Y-axis translation mechanism connected to the welding X-axis translation mechanism, a welding ZR-axis mechanism connected to the welding Y-axis translation mechanism, and a welding mechanism connected to the welding ZR-axis mechanism; the welding mechanism includes a welding fixed block, a welding head, a first connecting arm, a first rotating arm, and a solder feeding tube; the welding fixed block is connected to the welding ZR-axis mechanism, and the welding head is mounted on one side of the welding fixed block; one end of the first connecting arm is sleeved on the welding head, and the other end of the first connecting arm is provided with a first U-shaped notch; a first connecting shaft is connected between the inner walls on both sides of the first U-shaped notch; one end of the first rotating arm is inserted into the first U-shaped notch and is rotatably connected to the first connecting arm through the first connecting shaft; the solder feeding tube is obliquely mounted on the other end of the first rotating arm, and the end of the solder feeding tube for feeding solder is arranged towards the bottom direction of the welding head.

[0006] Further, the welding mechanism further includes a limiting plate and a direction ball; a second connecting shaft is connected to the middle of one side of the first rotating arm, the limiting plate is arranged on one side of the first rotating arm and is connected to the first rotating arm through the second connecting shaft; a first limiting hole is further opened at the other end of the first rotating arm, and a second limiting hole is also opened at the corresponding position of one side of the limiting plate; the direction ball is arranged between the limiting plate and the first rotating arm, and a part of the surface of the direction ball is clamped in the first limiting hole and the second limiting hole; a first mounting hole is further opened on the direction ball, and the middle part of the solder feeding tube is mounted in the first mounting hole.

[0007] Further, the welding mechanism further includes a first connecting block sleeved on the solder feeding tube, and a blowing tube mounted on the first connecting block; one end of the blowing tube extends towards the bottom direction of the welding head.

[0008] Further, the welding mechanism further includes a second connecting block, a first connecting plate, and a first locking plate; the second connecting block is connected to the welding ZR-axis mechanism, and a first clamping groove is opened on one side of the second connecting block; the first connecting plate has a convex arc-shaped structure, and the middle part of the first connecting plate is clamped in the first clamping groove; a first sliding hole with an arc-shaped structure is further opened on one side of the first connecting plate, the first locking plate is mounted on the first connecting plate, and a first locking hole is also opened at the corresponding position of the first locking plate and the first sliding hole; the welding fixing block is mounted on the first connecting plate.

[0009] Further, a first clamping block is further connected to one side of the welding fixing block, and a second mounting hole is opened on the first clamping block; the middle part of the welding head is mounted in the second mounting hole.

[0010] Further, the transmission device includes a feeding lifting mechanism mounted at one end of the mounting base plate, a receiving lifting mechanism mounted at the other end of the mounting base plate, a feeding transmission mechanism mounted on the top of the mounting base plate and located between the feeding lifting mechanism and the receiving lifting mechanism, and a return transmission mechanism mounted on the bottom of the mounting base plate and located between the feeding lifting mechanism and the receiving lifting mechanism; the feeding transmission mechanism includes two feeding transmission frames arranged in parallel and spaced apart on the top of the mounting base plate, a feeding transmission belt module mounted on the feeding transmission frame, and a transmission motor assembly mounted on the feeding transmission frame and connected to the feeding transmission belt module; a jacking positioning mechanism is further mounted on the top of the mounting base plate, and the jacking positioning mechanism is arranged between the two feeding transmission frames; a first blocking mechanism is further mounted on one side of the jacking positioning mechanism.

[0011] Furthermore, the lifting and positioning mechanism includes a first base plate installed on the top of the mounting base plate, a first fixing plate arranged above the first base plate, a lifting cylinder installed between the first base plate and the first fixing plate, a first connecting rod connected to the output shaft of the lifting cylinder, and a first lifting plate arranged above the first fixing plate and connected to the first connecting rod; positioning pins are respectively installed at the four corners of the top of the first lifting plate.

[0012] Furthermore, a second through hole is respectively opened at both ends of the top of the mounting base plate; both the feeding lifting mechanism and the discharging lifting mechanism include a first mounting frame, a Z-axis lifting mechanism, and a transfer transmission mechanism; the upper part of the first mounting frame passes through the second through hole, and a first connecting seat connected to the top of the mounting base plate is also installed on one side of the upper part of the first mounting frame; the Z-axis lifting mechanism is installed on the other side of the first mounting frame, and the Z-axis lifting mechanism is also drivingly connected to a Z-axis lifting frame; the transfer transmission mechanism is installed on the Z-axis lifting frame.

[0013] Adopting the above scheme, the beneficial effects of the present utility model are as follows:

[0014] The present utility model can realize multi-type spot welding, with high automation and high working efficiency. At the same time, the carrier can be recycled, which can reduce the loading and unloading time, speed up the production process, improve the overall operation fluency, and can save labor costs, with strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the welding device of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the welding mechanism of the present utility model;

[0018] Figure 4 is a schematic structural diagram of the transmission device of the present utility model;

[0019] Figure 5 is a schematic structural diagram of the feeding lifting mechanism of the present utility model;

[0020] Figure 6 is a schematic structural diagram of the lifting and positioning mechanism of the present utility model;

[0021] Among them, the description of the attached drawing reference numerals is as follows:

[0022] 1. Transmission device; 2. Welding mounting frame; 3. Welding device; 11. Mounting base plate; 12. Feeding lifting mechanism; 13. Receiving lifting mechanism; 14. Loading transmission mechanism; 15. Return flow transmission mechanism; 16. Jacking positioning mechanism; 17. First blocking mechanism; 18. Second blocking mechanism; 19. Third blocking mechanism; 31. Welding X-axis translation mechanism; 32. Welding Y-axis translation mechanism; 33. Welding ZR-axis mechanism; 34. Welding mechanism; 35. Tin feeder; 121. First mounting frame; 122. Z-axis lifting mechanism; 123. Transfer transmission mechanism; 124. First connecting seat; 125. Z-axis lifting frame; 126. Limiting rod; 127. Second position sensor; 161. First base plate; 162. First fixing plate; 163. Jacking cylinder; 164. First connecting rod; 165. First jacking plate; 166. Positioning pin; 167. Linear bearing; 168. Lifting guide rod; 169. First position sensor; 341. Welding fixing block; 342. Welding head; 343. First connecting arm; 344. First rotating arm; 345. Tin feeding pipe; 346. Limiting plate; 347. Direction ball; 348. First connecting block; 349. Air blowing pipe; 301. Second connecting block; 302. First connecting plate; 303. First locking plate; 304. First sliding hole; 305. First clamping block. Detailed implementation mode

[0023] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Refer to Figures 1 to 6As shown in the figure, the present utility model provides a multi-station automatic welding machine based on a self-circulating transmission line. In one embodiment, it includes a mounting base plate 11, a transmission device 1 mounted on the mounting base plate 11, a welding mounting frame 2 arranged on one side of the transmission device 1, and a plurality of welding devices 3 mounted on the welding mounting frame 2; the welding device 3 includes a welding X-axis translation mechanism 31 mounted on the top of the welding mounting frame 2, a welding Y-axis translation mechanism 32 connected to the welding X-axis translation mechanism 31, a welding ZR-axis mechanism 33 connected to the welding Y-axis translation mechanism 32, and a welding mechanism 34 connected to the welding ZR-axis mechanism 33; the welding mechanism 34 includes a welding fixing block 341, a welding head 342, a first connecting arm 343, a first rotating arm 344, and a solder feeding tube 345; the welding fixing block 341 is connected to the welding ZR-axis mechanism 33, and the welding head 342 is mounted on one side of the welding fixing block 341; one end of the first connecting arm 343 is sleeved on the welding head 342, and a first U-shaped notch is opened at the other end of the first connecting arm 343; a first connecting shaft is connected between the inner walls on both sides of the first U-shaped notch; one end of the first rotating arm 344 is inserted into the first U-shaped notch and is rotatably connected to the first connecting arm 343 through the first connecting shaft; the solder feeding tube 345 is obliquely mounted on the other end of the first rotating arm 344, and the end of the solder feeding tube 345 for feeding solder is arranged towards the bottom direction of the welding head 342.

[0025] In this embodiment, the number of welding devices 3 is three. The welding X-axis translation mechanism 31 and the welding Y-axis translation mechanism 32 of the welding device 3 can directly adopt linear modules. The welding ZR-axis mechanism 33 includes a welding Z-axis lifting mechanism 122 (linear module) connected to the welding Y-axis translation mechanism 32, and a welding R-axis rotation mechanism connected to the welding Z-axis lifting mechanism 122 (either by using a rotary motor in cooperation with a synchronous belt or directly adopting an existing ZR module, and there is no limitation on this). At the same time, a solder feeder 35 is also arranged on the welding ZR-axis mechanism 33. With the mutual cooperation of the above four mechanisms, the welding mechanism 34 can be driven to perform translational, lifting, and rotational movements so as to weld the product; at the same time, the first rotating arm 344 can rotate relative to the first connecting arm 343, and thus the angle of the solder feeding tube 345 can be adjusted to meet different usage requirements, with strong versatility.

[0026] In addition, the welding mechanism 34 further includes a limit plate 346 and a direction ball 347. A second connecting shaft is connected to the middle of one side of the first rotating arm 344. The limit plate 346 is arranged on one side of the first rotating arm 344 and is connected to the first rotating arm 344 through the second connecting shaft. A first limit hole is further opened at the other end of the first rotating arm 344, and a second limit hole is also opened at the position corresponding to the first limit hole on one side of the limit plate 346. The direction ball 347 is arranged between the limit plate 346 and the first rotating arm 344, and a part of the surface of the direction ball 347 is clamped in the first limit hole and the second limit hole. A first mounting hole is further opened on the direction ball 347, and the middle part of the solder feeding tube 345 is mounted in the first mounting hole.

[0027] In this embodiment, the bottom of the first rotating arm 344 has an inverted hook-shaped structure. The lower part of the limit plate 346 is located inside the inverted hook, which can limit the limit plate 346. At the same time, the middle part of the solder feeding tube 345 is mounted inside the direction ball 347, and the swinging direction of the solder feeding tube 345 can be freely adjusted through the direction ball 347. In addition, the welding mechanism 34 further includes a first connecting block 348 sleeved on the solder feeding tube 345 and a blow pipe 349 mounted on the first connecting block 348. One end of the blow pipe 349 extends towards the bottom of the welding head 342. The blow pipe 349 can be connected to an external air source to blow air towards the bottom of the welding head 342 to clean the solder slag. At the same time, three solder slag cleaning boxes are also mounted on the transmission device 1 (one is arranged below each welding mechanism 34). After the welding mechanism 34 welds a certain number of products, it will automatically run to the solder slag cleaning box for automatic cleaning to increase the service life of the welding head 342.

[0028] At the same time, the welding mechanism 34 further includes a second connecting block 301, a first connecting plate 302, and a first locking plate 303. The second connecting block 301 is connected to the welding ZR-axis mechanism 33, and a first clamping groove is opened on one side of the second connecting block 301. The first connecting plate 302 has an outwardly convex arc-shaped structure, and the middle part of the first connecting plate 302 is clamped in the first clamping groove. A first sliding hole 304 with an arc-shaped structure is further opened on one side of the first connecting plate 302. The first locking plate 303 is mounted on the first connecting plate 302, and a first locking hole corresponding to the first sliding hole 304 is also opened on the first locking plate 303. The welding fixing block 341 is mounted on the first connecting plate 302. A first clamping block 305 is further connected to one side of the welding fixing block 341, and a second mounting hole is also opened on the first clamping block 305. The middle part of the welding head 342 is mounted in the second mounting hole. The first connecting plate 302 can move relative to the first clamping groove, so as to freely adjust the installation angle of the welding mechanism 34. After the angle is adjusted, a screw can be locked in the first locking hole to lock and fix it.

[0029] In one embodiment, the transfer device 1 includes a feeding lifting mechanism 12 installed at one end of the mounting base plate 11, a receiving lifting mechanism 13 installed at the other end of the mounting base plate 11, a feeding transfer mechanism 14 installed on the top of the mounting base plate 11 and located between the feeding lifting mechanism 12 and the receiving lifting mechanism 13, and a return transfer mechanism 15 installed at the bottom of the mounting base plate 11 and located between the feeding lifting mechanism 12 and the receiving lifting mechanism 13; the feeding transfer mechanism 14 includes two feeding transfer racks arranged in parallel and spaced apart on the top of the mounting base plate 11, a feeding transfer belt module installed on the feeding transfer racks, and a transfer motor assembly installed on the feeding transfer racks and connected to the feeding transfer belt module; a jacking positioning mechanism 16 is further installed on the top of the mounting base plate 11, and the jacking positioning mechanism 16 is arranged between the two feeding transfer racks; a first blocking mechanism 17 is further installed on one side of the jacking positioning mechanism 16.

[0030] In this embodiment, the number of the jacking positioning mechanisms 16 is three, and the three jacking positioning mechanisms 16 are arranged at intervals in the length direction of the mounting base plate 11 between the two feeding transfer racks (that is, three welding stations are provided, and each welding station welds one welding point of the product, and each jacking positioning mechanism 16 is arranged below a welding mechanism 34), and a first blocking mechanism 17 is arranged on one side of each jacking positioning mechanism 16; at the same time, three second blocking mechanisms 18 are further provided (the installation position of each second blocking mechanism 18 is a buffer station), one of which is arranged between every two adjacent jacking positioning mechanisms 16, and the other second blocking mechanism 18 is arranged on one side of the receiving lifting mechanism 13; both the first blocking mechanism 17 and the second blocking mechanism 18 include a first blocking cylinder.

[0031] During operation, first, a product is placed on a carrier manually or by an external manipulator, and then the carrier is transferred to the feeding lifting mechanism 12, and the feeding lifting mechanism 12 conveys the carrier to the feeding transfer mechanism 14; the feeding transfer mechanism 14 then transfers the carrier to the No. 1 welding position (for the convenience of description, Figure 1From left to right, the positions of the three lifting and positioning mechanisms 16 are the 1st welding position, the 2nd welding position, and the 3rd welding position respectively. At the same time, the material discharging lifting mechanism 12 descends to wait for the recycling carrier; subsequently, the first blocking mechanism 17 at the 1st welding position blocks the carrier, and the lifting and positioning mechanism 16 jacks up the carrier to disengage it from the feeding conveyor module; then, the welding mechanism 34 at the 1st welding position welds one point of the product. After the welding is completed, the lifting and positioning mechanism 16 and the first blocking mechanism 17 descend, and the carrier flows to the first buffer station for storage along with the feeding conveyor mechanism 14; if there is a carrier at the 2nd welding position, the second blocking mechanism 18 at the first buffer station blocks the carrier. If there is no carrier at the 2nd welding position, the second blocking mechanism 18 descends, and the carrier flows to the 2nd welding position along with the feeding conveyor mechanism 14. The first blocking mechanism 17 at the 2nd welding position blocks the carrier, and the lifting and positioning mechanism 16 jacks up the carrier to wait for the welding mechanism 34 to weld another welding point of the product. By repeating this operation, the welding of 3 welding points is achieved.

[0032] After the welding mechanism 34 at the 3rd welding position completes the welding of the product, the carrier flows to the material receiving lifting mechanism 13. The material receiving lifting mechanism 13 descends and transports the carrier to the return conveyor mechanism 15. The return conveyor mechanism 15 then conveys the carrier to the material discharging lifting mechanism 12. The material discharging lifting mechanism 12 ascends, and a worker or a manipulator takes away the welded product and then puts in a new product, thereby realizing the cyclic operation of the carrier; in this embodiment, the structure and working mode of the return conveyor mechanism 15 are similar to those of the feeding conveyor mechanism 14 and will not be elaborated here. At the same time, two third blocking mechanisms 19 are also installed at one end of the return conveyor mechanism 15 close to the material receiving lifting mechanism 13. The third blocking mechanisms 19 play a role in blocking and buffering to prevent the carrier from being prematurely transported onto the material receiving lifting mechanism 13.

[0033] In one embodiment, the lifting and positioning mechanism 16 includes a first base plate 161 installed on the top of the installation base plate 11, a first fixing plate 162 arranged above the first base plate 161, a lifting cylinder 163 installed between the first base plate 161 and the first fixing plate 162, a first connecting rod 164 connected to the output shaft of the lifting cylinder 163, and a first lifting plate 165 arranged above the first fixing plate 162 and connected to the first connecting rod 164. The carrier is arranged on the first lifting plate 165. Driven by the lifting cylinder 163, the first lifting plate 165 can be driven by the first connecting rod 164 to drive the carrier to rise, so as to weld the product. At the same time, a positioning pin 166 is installed at each of the four corners of the top of the first lifting plate 165. Positioning holes are provided at the four corners of the bottom of the carrier corresponding to the positioning pins 166, so that positioning can be quickly carried out when the carrier is lifted. In addition, a linear bearing 167 is installed at each of the four corners of the first fixing plate 162, and a lifting guide rod 168 is installed on each linear bearing 167; the top of the lifting guide rod 168 is connected to the bottom of the first lifting plate 165. When the carrier is lifted, the lifting guide rod 168 can be used to guide it to improve the stability of its movement. In addition, a first position sensor 169 is installed on the top of the first fixing plate 162, and a first through hole is provided at the position corresponding to the first position sensor 169 on the top of the first lifting plate 165. The first position sensor 169 can be used to detect whether the carrier is in place.

[0034] In one embodiment, a second through hole is provided at each of the two ends of the top of the installation base plate 11; both the feeding lifting mechanism 12 and the discharging lifting mechanism 13 include a first installation frame 121, a Z-axis lifting mechanism 122, and a transfer and transmission mechanism 123; the upper part of the first installation frame 121 passes through the second through hole and is arranged, and a first connecting seat 124 connected to the top of the installation base plate 11 is also installed on one side of the upper part of the first installation frame 121; the Z-axis lifting mechanism 122 is installed on the other side of the first installation frame 121, and the Z-axis lifting mechanism 122 is also drivingly connected to a Z-axis lifting frame 125; the transfer and transmission mechanism 123 is installed on the Z-axis lifting frame 125.

[0035] In this embodiment, the Z-axis lifting mechanism 122 adopts a linear module, and the transfer and transmission mechanism 123 can adopt a conventional conveyor belt assembly line, which is not limited thereto. At the same time, a limiting rod 126 is installed at one end of the top of the transfer and transmission mechanism 123; a second position sensor 127 is also installed on the Z-axis lifting frame 125. Through the limiting rod 126, the carrier transported to the transfer and transmission mechanism 123 can be limited to prevent it from falling off the transfer and transmission mechanism 123. At the same time, through the second position sensor 127, it can be detected whether the carrier is in place, so that the background control system can perform the next motion control.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A multi-station automatic welding machine based on a self-circulating transmission line, characterized in that: It includes a mounting base plate, a transmission device mounted on the mounting base plate, a welding mounting frame arranged on one side of the transmission device, and a plurality of welding devices mounted on the welding mounting frame; the welding device includes a welding X-axis translation mechanism mounted on the top of the welding mounting frame, a welding Y-axis translation mechanism connected to the welding X-axis translation mechanism, a welding ZR-axis mechanism connected to the welding Y-axis translation mechanism, and a welding mechanism connected to the welding ZR-axis mechanism; the welding mechanism includes a welding fixing block, a welding head, a first connecting arm, a first rotating arm, and a tin feeding tube; the welding fixing block is connected to the welding ZR-axis mechanism, and the welding head is mounted on one side of the welding fixing block; one end of the first connecting arm is sleeved on the welding head, and a first U-shaped notch is provided at the other end of the first connecting arm; a first connecting shaft is connected between the inner walls on both sides of the first U-shaped notch; one end of the first rotating arm is inserted into the first U-shaped notch, and is rotationally connected to the first connecting arm via the first connecting shaft; the tin feeding tube is obliquely installed at the other end of the first rotating arm, and the end of the tin feeding tube used for feeding tin is arranged toward the bottom direction of the welding head.

2. The multi-station automatic welding machine based on the self-circulating transmission line according to claim 1 is characterized in that: The welding mechanism also includes a limit plate and a direction ball; a second connecting shaft is connected to the middle part of one side of the first rotating arm, and the limit plate is arranged on one side of the first rotating arm and connected to the first rotating arm via the second connecting shaft; a first limit hole is also provided at the other end of the first rotating arm, and a second limit hole is also provided on one side of the limit plate corresponding to the first limit hole; the direction ball is arranged between the limit plate and the first rotating arm, and part of the surface of the direction ball is clamped in the first limit hole and the second limit hole; a first mounting hole is also provided on the direction ball, and the middle part of the tin feeding tube is installed in the first mounting hole.

3. The multi-station automatic welding machine based on the self-circulating transmission line according to claim 2 is characterized in that: The welding mechanism also includes a first connecting block sleeved on the tin feeding tube, and an air blowing pipe installed on the first connecting block; one end of the air blowing pipe is extended toward the bottom direction of the welding head.

4. The multi-station automatic welding machine based on the self-circulating transmission line according to claim 3 is characterized in that: The welding mechanism also includes a second connecting block, a first connecting plate, and a first locking plate; the second connecting block is connected to the welding ZR axis mechanism, and a first card slot is provided on one side of the second connecting block; the first connecting plate is in an outwardly convex arc shape, and the middle part of the first connecting plate is clamped in the first card slot; a first sliding hole in an arc shape is also provided on one side of the first connecting plate, the first locking plate is installed on the first connecting plate, and a first locking hole is also provided on the first locking plate corresponding to the first sliding hole; the welding fixing block is installed on the first connecting plate.

5. The multi-station automatic welding machine based on the self-circulating transmission line according to claim 4 is characterized in that: A first clamping block is also connected to one side of the welding fixing block, and a second mounting hole is also provided on the first clamping block; the middle part of the welding head is installed in the second mounting hole.

6. The multi-station automatic welding machine based on the self-circulating transmission line according to claim 1 is characterized in that: The transmission device includes a material unloading lifting mechanism installed at one end of the mounting base plate, a material receiving lifting mechanism installed at the other end of the mounting base plate, a loading transmission mechanism installed at the top of the mounting base plate and located between the material unloading lifting mechanism and the material receiving lifting mechanism, and a reflux transmission mechanism installed at the bottom of the mounting base plate and located between the material unloading lifting mechanism and the material receiving lifting mechanism; the loading transmission mechanism includes two loading transmission frames arranged in parallel and at intervals on the top of the mounting base plate, a loading conveyor belt module installed on the loading transmission frame, and a transmission motor assembly installed on the loading transmission frame and connected to the loading conveyor belt module; a jacking and positioning mechanism is also installed on the top of the mounting base plate, and the jacking and positioning mechanism is arranged between the two loading transmission frames; a first blocking mechanism is also installed on one side of the jacking and positioning mechanism.

7. The multi-station automatic welding machine based on the self-circulating transmission line according to claim 6 is characterized in that: The lifting and positioning mechanism includes a first base plate installed on the top of the installation base plate, a first fixed plate arranged above the first base plate, a lifting cylinder installed between the first base plate and the first fixed plate, a first connecting rod connected to the output shaft of the lifting cylinder, and a first lifting plate arranged above the first fixed plate and connected to the first connecting rod; a positioning pin is also installed at each of the four corners of the top of the first lifting plate.

8. The multi-station automatic welding machine based on the self-circulating transmission line according to claim 6 is characterized in that: A second through hole is respectively provided at both ends of the top of the mounting base; the material discharge lifting mechanism and the material collection lifting mechanism both include a first mounting frame, a Z-axis lifting mechanism, and a transfer transmission mechanism; the upper part of the first mounting frame is arranged through the second through hole, and a first connecting seat connected to the top of the mounting base is also installed on one side of the upper part of the first mounting frame; the Z-axis lifting mechanism is installed on the other side of the first mounting frame, and the Z-axis lifting mechanism is also driven and connected to the Z-axis lifting frame; the transfer transmission mechanism is installed on the Z-axis lifting frame.

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