Display screen support precise alignment welding tool device

Abstract

The application discloses a display screen support precise alignment welding tool device, relates to the technical field of support welding tool, and comprises a rack, a rotating frame is rotationally connected on the rack, a plurality of material placing racks are fixedly connected on the rotating frame, and the device further comprises a welding mechanism. The adjusting unit is arranged, the clamping point of the support of different sizes is adaptively adjusted, an operator only needs to rotate a threaded rod, a plurality of baffle plates can be synchronously driven to move through the mounting block and the connecting rod, the first sliding piston rod, the L-shaped rod and the sliding block are driven to move by using oil transmission, the telescopic frame is uniformly extended and retracted, and then the positions of all the pressing plates are synchronously adjusted according to the size of the support. The design not only simplifies the adjusting operation, but also ensures that the pressing plates can act on reasonable and symmetrical clamping positions regardless of the change of the size of the support, the stability and the universality of clamping are remarkably improved, and the production of products of various specifications can be adapted without replacing the clamp.

Description

Technical Field

[0001] This invention relates to the field of bracket welding fixture technology, and in particular to a precision alignment welding fixture for display screen brackets. Background Technology

[0002] In the manufacturing process of display modules, bracket components usually need to be connected into an overall frame structure by diagonal welding of multiple strip or frame-shaped parts.

[0003] Chinese patent CN115476077A discloses a bracket rotary welding fixture, which includes a support mechanism, a rotary drive mechanism and a moving welding mechanism. The support mechanism includes a rotary support component, a sliding support component and a fixed frame component. The rotary drive mechanism includes a rotary drive component. The moving welding mechanism includes a horizontal moving component and a vertical moving component that slides on one side of the upper end of the horizontal moving component.

[0004] However, the above invention has the following shortcomings: When performing diagonal welding on existing brackets, due to the significant differences in the external dimensions and component layouts of different specifications of display brackets, traditional fixed clamps cannot quickly adapt to the switching between various models. Because the bracket is elongated, multiple clamping points need to be arranged along the length of the bracket. The position adjustment of each clamping point is independent of each other, making it difficult to ensure the symmetry and uniformity of all clamping points relative to the reference plane. During operator adjustments, inconsistencies in the positions of the clamping points can easily occur, resulting in uneven force on the bracket after clamping, causing slight deformation or positioning deviations, which in turn affect the overall dimensional accuracy and flatness of the bracket after welding. Summary of the Invention

[0005] The purpose of this invention is to provide a precision alignment and welding fixture for display screen brackets to solve the problems mentioned in the background art.

[0006] The technical solution of the present invention is: a precision alignment and welding fixture for a display screen bracket, comprising a frame, a rotating frame rotatably connected to the frame, and multiple feeding racks fixedly connected to the rotating frame, and further comprising: A welding mechanism, which is located on a feeding rack; The welding mechanism includes an adjustment unit, a rotation unit, a docking unit, and a fixing unit. The adjustment unit includes fixed rails fixedly connected to each feeding rack, a fixed block fixedly connected to each fixed rail, multiple sliders slidably connected to each fixed rail, a telescopic frame mounted on the fixed block and multiple sliders, a fixed rod fixedly connected to the fixed block and each slider, a U-shaped rod slidably connected to each fixed rod, a pressure plate fixedly connected to one end of each U-shaped rod, an L-shaped rod fixedly connected to the slider near the fixed block, a fixed tube fixedly connected to the bottom of the feeding rack, a fixed cylinder fixedly connected to the bottom end of the fixed tube, a first sliding piston rod slidably connected to the fixed cylinder, one end of the first sliding piston rod fixedly connected to the L-shaped rod, a cavity opened in the feeding rack, a piston slidably connected in the cavity, a sliding rod fixedly connected to the piston, a baffle fixedly connected to one end of the sliding rod, a through groove opened in the feeding rack, the two ends of the through groove being connected to the cavity and the fixed tube respectively.

[0007] Preferably, the rotating unit includes a threaded rod rotatably connected to the rotating frame, a mounting block screwed onto the threaded rod, and multiple connecting rods rotatably connected to the mounting block. One end of each of the multiple connecting rods is rotatably connected to multiple baffles. A return spring is provided inside a U-shaped rod located above the fixed block, and the two ends of the return spring are fixedly connected to the U-shaped rod and the fixed rod, respectively.

[0008] Preferably, a motor is fixedly connected to the bottom of the frame, a worm gear is fixedly connected to the output end of the motor, a worm wheel is fixedly connected to the bottom end of the rotating frame, the worm gear and the worm wheel mesh with each other, and multiple spring pieces are fixedly connected to the inner walls on both sides of each feeding frame.

[0009] Preferably, the docking unit includes a loading rack fixedly connected to the frame, a slide rail fixedly connected to the loading rack, a hydraulic rod fixedly connected to the slide rail, a sliding plate fixedly connected to the output end of the hydraulic rod, the sliding plate slidably connected to the slide rail, an installation tube fixedly connected to the sliding plate, sliding pins slidably connected to both ends of the installation tube, and a clamping plate fixedly connected to one end of each of the two sliding pins.

[0010] Preferably, each of the two sliding pins is fitted with a compression spring, and the two ends of the compression spring are fixedly connected to the mounting tube and the clamping plate, respectively.

[0011] Preferably, the fixing unit includes a fixing seat fixedly connected to the sliding plate, a rotating shaft rotatably connected to the fixing seat, a fixing shell fixedly connected to the rotating shaft, a second sliding piston rod slidably connected to the fixing shell, a push plate rotatably connected to one end of the second sliding piston rod, a pressing rod fixedly connected to the push plate, an inclined rod fixedly connected to a U-shaped rod located above the fixing block, a telescopic rod fixedly connected to two adjacent U-shaped rods, and a flexible hose fixedly connected to both the fixing shell and the mounting tube.

[0012] Preferably, a torsion spring is sleeved on the rotating shaft, and the two ends of the torsion spring are fixedly connected to the fixed seat and the rotating shaft, respectively.

[0013] Preferably, a telescopic spring is sleeved on the second sliding piston rod, and the two ends of the telescopic spring are fixedly connected to the fixed shell and the second sliding piston rod, respectively.

[0014] Preferably, a movable rod is slidably connected to the feeding rack, a fixed plate is fixedly connected to one end of the movable rod, a connecting spring is sleeved on the movable rod, and the two ends of the connecting spring are fixedly connected to the feeding rack and the movable rod, respectively.

[0015] This invention provides an improved precision alignment and welding fixture for display screen brackets, which has the following improvements and advantages compared to the prior art: Firstly, this invention achieves adaptive adjustment of the clamping points for supports of different sizes by incorporating an adjustment unit. The operator simply rotates the threaded rod, which synchronously drives multiple baffles to move via the mounting block and connecting rod. Simultaneously, hydraulic transmission moves the first sliding piston rod, L-shaped rod, and slider, causing the telescopic frame to extend and retract uniformly. This allows the positions of all pressure plates to adjust synchronously with the support size. This design not only simplifies the adjustment operation but also ensures that regardless of changes in support size, the pressure plates operate in reasonable and symmetrical clamping positions, significantly improving clamping stability and versatility. It can adapt to the production of various product specifications without changing the fixtures.

[0016] Secondly, this invention achieves precise alignment and automatic clamping through the coordinated operation of the docking unit and the fixing unit. The hydraulic rod pushes the sliding plate and clamping plate to transport the docking bracket to the welding bracket on the feeding rack. During the pushing process, the push plate first contacts the welding bracket and pushes it against the baffle, ensuring complete contact of the docking reference surface and achieving precise positioning. When the push plate stops moving forward due to obstruction, the pressing rod on it pushes the inclined rod, which, through the U-shaped rod and telescopic rod, drives all the clamping plates to press down synchronously, completing automatic clamping. The second sliding piston rod presses oil into the installation pipe through the hose, enhancing the clamping force of the clamping plates. The entire process is completed seamlessly, achieving reliable fixing while completing precise alignment, avoiding errors introduced by operating the alignment and clamping actions separately.

[0017] Thirdly, this invention achieves continuous cyclic operation by setting up a rotating frame, a motor, a worm gear, and multiple feeding racks. The motor drives the rotating frame to rotate intermittently, moving the feeding rack that has been welded out of the workstation while simultaneously rotating the next feeding rack to be welded to the loading position. In conjunction with the reciprocating motion of the hydraulic rod, the processes of loading, alignment, clamping, welding, and unloading can be performed in parallel on different feeding racks, greatly improving production efficiency, shortening the production cycle, and making it suitable for automated mass production. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure from a first-view perspective in this invention; Figure 2 This is a schematic diagram of the overall three-dimensional structure from a second perspective in this invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the adjustment unit in this invention; Figure 4 This is a schematic diagram of the internal cross-sectional structure of the feeding rack in this invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the docking unit in this invention; Figure 6 This is a three-dimensional structural diagram of the rotating shaft and torsion spring in this invention; Figure 7 This is a schematic diagram of the internal cross-sectional structure of the feeding rack in this invention; Figure 8 This is a schematic diagram of the feeding rack and spring sheet cooperation structure in this invention; Figure 9 This is a schematic diagram of the internal cross-sectional structure of the U-shaped rod in this invention.

[0020] Figure label: 1. Frame; 11. Rotating frame; 12. Feeding frame; 13. Baffle; 14. Threaded rod; 15. Mounting block; 16. Connecting rod; 17. Sliding rod; 18. Piston; 19. Cavity; 110. Through groove; 2. Fixed track; 21. Fixed block; 22. Slider; 23. Telescopic frame; 24. L-shaped rod; 25. Fixed cylinder; 26. Fixed tube; 27. First sliding piston rod; 28. Fixed rod; 29. ​​U-shaped rod; 210. Pressure plate; 211. Telescopic rod; 212. Diagonal rod; 21 3. Return spring; 3. Motor; 31. Worm gear; 32. Worm wheel; 4. Feeding rack; 41. Slide rail; 42. Hydraulic rod; 43. Sliding plate; 44. Mounting tube; 45. Sliding pin; 46. Clamping plate; 47. Compression spring; 5. Fixed seat; 51. Rotating shaft; 52. Fixed shell; 53. Second sliding piston rod; 54. Push plate; 55. Hoses; 56. Telescopic spring; 57. Torsion spring; 58. Compression rod; 6. Movable rod; 61. Fixed plate; 62. Connecting spring; 7. Spring sheet. Detailed Implementation

[0021] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] This invention provides an improved precision alignment and welding fixture for display screen brackets. The technical solution of this invention is as follows: like Figures 1 to 9 As shown, this embodiment of the invention provides a precision alignment and welding fixture for a display screen bracket, including a frame 1, a rotating frame 11 rotatably connected to the frame 1, and multiple feeding racks 12 fixedly connected to the rotating frame 11, and further including: Welding mechanism, located on feeding rack 12; The welding mechanism includes an adjustment unit, a rotation unit, a docking unit, and a fixing unit. The adjustment unit includes fixed rails 2 fixedly connected to each feeding rack 12. Each fixed rail 2 has a fixed block 21 fixedly connected to it. Multiple sliders 22 are slidably connected to each fixed rail 2. A telescopic frame 23 is mounted on the fixed blocks 21 and the multiple sliders 22. Fixed rods 28 are fixedly connected to each fixed block 21 and each slider 22. A U-shaped rod 29 is slidably connected to each fixed rod 28. A pressure plate 210 is fixedly connected to one end of each U-shaped rod 29. An L-shaped rod 24 is fixedly connected to the slider 22 closest to the fixed block 21. A fixed tube 26 is fixedly connected to the bottom of the feeding rack 12. A fixed cylinder 25 is fixedly connected to the bottom end of the fixed tube 26. A first sliding piston rod 27 is slidably connected to the fixed cylinder 25. One end of the first sliding piston rod 27 is fixedly connected to the L-shaped rod 24. A cavity 19 is provided on the feeding rack 12, and a piston is slidably connected within the cavity 19. 18. A sliding rod 17 is fixedly connected to the piston 18. A baffle 13 is fixedly connected to one end of the sliding rod 17. A through groove 110 is provided on the feeding rack 12. The two ends of the through groove 110 are connected to the cavity 19 and the fixed tube 26, respectively. With the setting of the adjustment unit, when the baffle 13 moves along the axial direction of the sliding rod 17, it can weld display brackets of different sizes. The movement of the baffle 13 drives the sliding rod 17 and the piston 18 to move. The movement of the piston 18 squeezes the oil in the cavity 19 into the fixed cylinder 25 through the through groove 110 and the fixed tube 26. The oil drives the first sliding piston rod 27, the L-shaped rod 24 and the slider 22 connected to it to slide along the fixed track 2. The movement of the slider 22 drives the telescopic frame 23 to extend, so that the distance between all sliders 22 changes evenly. This drives all fixed rods 28, U-shaped rods 29 and pressure plates 210 to adjust their positions synchronously. When welding brackets of different sizes, the clamping point can be adaptively adjusted to improve the stability of the bracket.

[0023] Furthermore, the rotating unit includes a threaded rod 14 rotatably connected to the rotating frame 11. A mounting block 15 is screwed onto the threaded rod 14, and multiple connecting rods 16 are rotatably connected to the mounting block 15. One end of each connecting rod 16 is rotatably connected to multiple baffles 13. A return spring 213 is provided inside the U-shaped rod 29 located above the fixed block 21. The two ends of the return spring 213 are fixedly connected to the U-shaped rod 29 and the fixed rod 28, respectively. With the setting of the rotating unit, the operator can pre-rotate the threaded rod 14, which drives the mounting block 15 to move up and down. When the mounting block 15 moves upward, it pulls multiple baffles 13 simultaneously through the connecting rods 16, realizing the simultaneous adjustment of multiple baffles 13. With the setting of the return spring 213, the return spring 213 can drive the U-shaped rod 29 to return to its original position.

[0024] Furthermore, a motor 3 is fixedly connected to the bottom of the frame 1, and a worm gear 31 is fixedly connected to the output end of the motor 3. A worm wheel 32 is fixedly connected to the bottom end of the rotating frame 11. The worm gear 31 and the worm wheel 32 mesh with each other. Multiple spring pieces 7 are fixedly connected to the inner walls on both sides of each feeding frame 12. Through the setting of the worm wheel 32, under the cooperation of the worm wheel 32 and the worm gear 31, the starting motor 3 drives the rotating frame 11 to rotate intermittently through the worm gear 31 and the worm wheel 32, realizing the precise intermittent rotation of the rotating frame 11. The worm wheel 32 and the worm gear 31 have self-locking characteristics, which can ensure that the rotating frame 11 is fixed in position when it stops. The spring pieces 7 are used to provide elastic pre-support when the support is put in, to prevent the support from moving or tilting significantly before it is pressed.

[0025] Furthermore, the docking unit includes a feeding rack 4 fixedly connected to the frame 1. A slide rail 41 is fixedly connected to the feeding rack 4. A hydraulic rod 42 is fixedly connected to the slide rail 41. A sliding plate 43 is fixedly connected to the output end of the hydraulic rod 42. The sliding plate 43 is slidably connected to the slide rail 41. An installation tube 44 is fixedly connected to the sliding plate 43. Sliding pins 45 are slidably connected to both ends of the installation tube 44. Clamping plates 46 are fixedly connected to one end of each of the two sliding pins 45. Compression springs 47 are sleeved on each of the two sliding pins 45. The two ends of the compression springs 47 are fixedly connected to the installation tube 44 and the clamping plates 46, respectively. With the docking unit, the hydraulic rod 42 is activated to push the sliding plate 43 to move along the slide rail 41 toward the unloading rack 12. The sliding plate 43 drives the installation tube 44 and the clamping plates 46 to move downward. Under the action of the compression springs 47, the two clamping plates 46 clamp the docking bracket. The movement of the clamping plates 46 drives the docking bracket to move downward until the docking bracket docks with the bracket on the unloading rack 12.

[0026] Furthermore, the fixing unit includes a fixing seat 5 fixedly connected to the sliding plate 43, a rotating shaft 51 rotatably connected to the fixing seat 5, a fixing shell 52 fixedly connected to the rotating shaft 51, a second sliding piston rod 53 slidably connected to the fixing shell 52, a push plate 54 rotatably connected to one end of the second sliding piston rod 53, a pressing rod 58 fixedly connected to the push plate 54, a diagonal rod 212 fixedly connected to a U-shaped rod 29 located above the fixing block 21, a telescopic rod 211 fixedly connected to two adjacent U-shaped rods 29, and a flexible hose 55 fixedly connected to the fixing shell 52 and the mounting tube 44. Through the setting of the fixing unit, the movement of the sliding plate 43 drives the fixing seat 5, the fixing shell 52, the second sliding piston rod 53, and the push plate 54 to move. When the push plate 54 contacts the bracket on the feeding rack 12, because the push plate 54 is made of rubber, the push plate 54 can push the bracket towards the stop. The plate 13 moves in the direction of the baffle 13, which ensures that the bracket can fully fit with the baffle 13 and achieve precise docking of the bracket. When the bracket does not move, the push plate 54 slides on the surface of the bracket, so that the pressing rod 58 on the push plate 54 contacts the inclined rod 212 and pushes the inclined rod 212, so that the U-shaped rod 29 is pressed down. And through the telescopic rod 211, the adjacent U-shaped rod 29 and the pressure plate 210 are pressed down synchronously, pressing the bracket tightly on the feeding rack 12. When the push plate 54 stops moving, the second sliding piston rod 53 enters the fixed shell 52, so that the telescopic spring 56 is compressed and undergoes elastic deformation. The second sliding piston rod 53 moves to let the oil in the fixed shell 52 enter the installation pipe 44 through the hose 55, so that the oil presses the clamping plate 46 on the docking bracket through the sliding pin 45, increasing the clamping force of the clamping plate 46, improving the stability of the docking bracket, and thus improving the precise docking effect of the bracket.

[0027] Furthermore, a torsion spring 57 is sleeved on the rotating shaft 51, and the two ends of the torsion spring 57 are fixedly connected to the fixed base 5 and the rotating shaft 51 respectively; through the setting of the torsion spring 57, the torsion spring 57 can drive the rotating shaft 51 and the fixed shell 52 to reset.

[0028] Furthermore, a telescopic spring 56 is sleeved on the second sliding piston rod 53, and the two ends of the telescopic spring 56 are fixedly connected to the fixed shell 52 and the second sliding piston rod 53 respectively; through the setting of the telescopic spring 56, the telescopic spring 56 can drive the second sliding piston rod 53 to reset.

[0029] Furthermore, a movable rod 6 is slidably connected to the feeding rack 4. A fixing plate 61 is fixedly connected to one end of the movable rod 6. A connecting spring 62 is sleeved on the movable rod 6. The two ends of the connecting spring 62 are fixedly connected to the feeding rack 4 and the movable rod 6, respectively. With the setting of the fixing plate 61, the docking bracket placed on the feeding rack 4 can be fixed. Under the action of the connecting spring 62, the docking bracket can be pushed to move to the predetermined position.

[0030] Working principle: The cavity 19 and the fixed shell 52 are filled with oil. According to the size specifications of the display bracket to be welded, the operator can pre-rotate the threaded rod 14, which drives the mounting block 15 to move up and down. When the mounting block 15 moves upward, it pulls multiple baffles 13 simultaneously through the connecting rod 16, causing the baffles 13 to move along the axis of the sliding rod 17. This enables welding of display brackets of different sizes. The movement of the baffles 13 drives the sliding rod 17 and the piston 18 to move. The movement of the piston 18 forces the oil in the cavity 19 into the fixed cylinder 25 through the through groove 110 and the fixed tube 26. The oil drives the first sliding piston rod 27, the L-shaped rod 24 and the connected slider 22 to slide along the fixed track 2. The movement of the slider 22 causes the telescopic frame 23 to extend, making the spacing between all sliders 22 change uniformly. This causes all fixed rods 28, U-shaped rods 29 and pressure plates 210 to adjust their positions synchronously, enabling adaptive adjustment of the clamping points when welding brackets of different sizes, thus improving the stability of the bracket.

[0031] The starting motor 3 drives the rotating frame 11 to rotate intermittently via the worm gear 31 and worm wheel 32, rotating 90° each time. This places the display screen bracket to be welded onto the feeding rack 12. The spring plates 7 on both sides of the feeding rack 12 provide initial elastic support for the bracket to prevent it from shifting. Then, the hydraulic rod 42 is activated to push the sliding plate 43 along the slide rail 41 toward the feeding rack 12. The sliding plate 43 drives the mounting tube 44 and clamping plate 46 to move downwards. Under the action of the compression spring 47, the two clamping plates 46 clamp the docking bracket. The movement of the clamping plates 46 drives the docking bracket to move downwards until the docking bracket is docked with the bracket on the feeding rack 12.

[0032] The movement of the sliding plate 43 drives the fixed seat 5, the fixed shell 52, the second sliding piston rod 53, and the push plate 54 to move. When the push plate 54 contacts the bracket on the feeding rack 12, because the push plate 54 is made of rubber, it can push the bracket towards the baffle 13, thereby ensuring that the bracket can fully fit with the baffle 13 and achieve precise docking of the bracket. When the bracket does not move, the push plate 54 slides on the surface of the bracket, causing the pressing rod 58 on the push plate 54 to contact the inclined rod 212 and push the inclined rod 212, causing the U-shaped rod 29 to press down and pass through... The telescopic rod 211 drives the adjacent U-shaped rod 29 and the pressure plate 210 to press down synchronously, pressing the bracket onto the feeding rack 12. When the push plate 54 stops moving, the second sliding piston rod 53 enters the fixed shell 52, causing the telescopic spring 56 to compress and undergo elastic deformation. The movement of the second sliding piston rod 53 causes the oil in the fixed shell 52 to enter the installation pipe 44 through the hose 55, so that the oil presses the clamping plate 46 onto the docking bracket through the sliding pin 45, increasing the clamping force of the clamping plate 46, improving the stability of the docking bracket, and thus improving the precise docking effect of the bracket.

[0033] After the brackets are docked, the welding robot welds the joints of the brackets. After welding, the hydraulic rod 42 retracts in the opposite direction, the clamping force of the clamping plate 46 weakens and slides on the docking bracket, then the pressing rod 58 disengages from the inclined rod 212, the pressure plate 210 is lifted by the return spring 213, and finally the clamping plate 46 disengages from the docking bracket. Then the rotating frame 11 rotates to move the next feeding frame 12 to the feeding station, realizing continuous cycle operation.

[0034] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A precision alignment and welding fixture for a display screen bracket, comprising a frame (1), characterized in that: A rotating frame (11) is rotatably connected to the frame (1), and multiple feeding racks (12) are fixedly connected to the rotating frame (11). The machine also includes: A welding mechanism located on a feeding rack (12); The welding mechanism includes an adjustment unit, a rotation unit, a docking unit, and a fixing unit. The adjustment unit includes a fixed rail (2) fixedly connected to each feeding rack (12). A fixed block (21) is fixedly connected to each fixed rail (2). Multiple sliders (22) are slidably connected to each fixed rail (2). A telescopic frame (23) is installed on the fixed block (21) and the multiple sliders (22). A fixed rod (28) is fixedly connected to each fixed block (21) and each slider (22). A U-shaped rod (29) is slidably connected to each fixed rod (28). A pressure plate (210) is fixedly connected to one end of each U-shaped rod (29). A fixed plate (210) is fixedly connected to the slider (22) located near the fixed block (21). An L-shaped rod (24) is connected to the bottom of the feeding rack (12), and a fixed tube (26) is fixedly connected to the bottom of the fixed tube (26). A fixed cylinder (25) is fixedly connected to the bottom end of the fixed tube (26). A first sliding piston rod (27) is slidably connected to the fixed cylinder (25). One end of the first sliding piston rod (27) is fixedly connected to the L-shaped rod (24). A cavity (19) is opened on the feeding rack (12). A piston (18) is slidably connected inside the cavity (19). A sliding rod (17) is fixedly connected to the piston (18). A baffle (13) is fixedly connected to one end of the sliding rod (17). A through groove (110) is opened on the feeding rack (12). The two ends of the through groove (110) are connected to the cavity (19) and the fixed tube (26) respectively.

2. The precision alignment and welding fixture for a display screen bracket according to claim 1, characterized in that: The rotating unit includes a threaded rod (14) rotatably connected to the rotating frame (11), a mounting block (15) is screwed onto the threaded rod (14), and a plurality of connecting rods (16) are rotatably connected to the mounting block (15). One end of the plurality of connecting rods (16) is rotatably connected to a plurality of baffles (13). A return spring (213) is provided in the U-shaped rod (29) located above the fixed block (21). The two ends of the return spring (213) are fixedly connected to the U-shaped rod (29) and the fixed rod (28) respectively.

3. The precision alignment and welding fixture for a display screen bracket according to claim 2, characterized in that: A motor (3) is fixedly connected to the bottom of the frame (1), a worm (31) is fixedly connected to the output end of the motor (3), a worm wheel (32) is fixedly connected to the bottom end of the rotating frame (11), the worm (31) and the worm wheel (32) mesh with each other, and multiple spring pieces (7) are fixedly connected to the inner walls on both sides of each feeding frame (12).

4. The precision alignment and welding fixture for a display screen bracket according to claim 2, characterized in that: The docking unit includes a loading rack (4) fixedly connected to the frame (1), a slide rail (41) fixedly connected to the loading rack (4), a hydraulic rod (42) fixedly connected to the slide rail (41), a sliding plate (43) fixedly connected to the output end of the hydraulic rod (42), the sliding plate (43) slidably connected to the slide rail (41), an installation tube (44) fixedly connected to the sliding plate (43), sliding pins (45) slidably connected to both ends of the installation tube (44), and clamping plates (46) fixedly connected to one end of each of the two sliding pins (45).

5. The precision alignment and welding fixture for a display screen bracket according to claim 4, characterized in that: Each of the two sliding pins (45) is fitted with a compression spring (47), and the two ends of the compression spring (47) are fixedly connected to the mounting tube (44) and the clamp (46) respectively.

6. The precision alignment and welding fixture for a display screen bracket according to claim 4, characterized in that: The fixing unit includes a fixing seat (5) fixedly connected to the sliding plate (43), a rotating shaft (51) rotatably connected to the fixing seat (5), a fixing shell (52) fixedly connected to the rotating shaft (51), a second sliding piston rod (53) slidably connected to the fixing shell (52), a push plate (54) rotatably connected to one end of the second sliding piston rod (53), a pressing rod (58) fixedly connected to the push plate (54), a diagonal rod (212) fixedly connected to the U-shaped rod (29) located above the fixing block (21), a telescopic rod (211) fixedly connected to two adjacent U-shaped rods (29), and a flexible hose (55) fixedly connected to the fixing shell (52) and the mounting tube (44).

7. The precision alignment and welding fixture for a display screen bracket according to claim 6, characterized in that: A torsion spring (57) is sleeved on the rotating shaft (51), and the two ends of the torsion spring (57) are fixedly connected to the fixed seat (5) and the rotating shaft (51) respectively.

8. The precision alignment and welding fixture for a display screen bracket according to claim 6, characterized in that: A telescopic spring (56) is sleeved on the second sliding piston rod (53), and the two ends of the telescopic spring (56) are fixedly connected to the fixed shell (52) and the second sliding piston rod (53) respectively.

9. The precision alignment and welding fixture for a display screen bracket according to claim 6, characterized in that: A movable rod (6) is slidably connected to the feeding rack (4). A fixed plate (61) is fixedly connected to one end of the movable rod (6). A connecting spring (62) is sleeved on the movable rod (6). The two ends of the connecting spring (62) are fixedly connected to the feeding rack (4) and the movable rod (6) respectively.

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