Computer display support welding device

Abstract

A computer display support welding device comprises a main supporting frame and a to-be-welded pipe, a circular seam welding mechanism is arranged at the top of the main supporting frame, the circular seam welding mechanism conducts pre-cleaning and welding operation on the to-be-welded pipe through a plasma welding head, bottom supporting bases are arranged on the two sides of the main supporting frame, and an auxiliary righting mechanism is arranged on the side face of the main supporting frame. The centering and positioning mechanisms are arranged on the two sides of the auxiliary righting mechanism, the auxiliary righting mechanism controls the centering and positioning mechanisms to be close to or away from to-be-welded pipes, so that feeding or discharging of the to-be-welded pipes is completed, the centering and positioning mechanisms clamp and position the to-be-welded pipes, and the to-be-welded pipes located on the two sides are in the state that the central axes coincide. And the to-be-welded pipes on the two sides are controlled to move to the to-be-welded positions. And only the plasma welding head moves in the overall welding process, so that the device consumes less energy in the welding process, and the overall welding cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of plasma welding, and in particular to a computer display bracket welding device. Background Art

[0002] The existing patent (publication number: CN118002898A) proposes a plasma welding device, including an electromagnetic guide rail fixedly mounted on the side of a base, and a linear motor is connected thereto in a transmission manner. A plasma nozzle is provided on one side of the linear motor, and a welding wire conduit communicated with a wire feeding mechanism is provided on the other side of the linear motor. The high-temperature plasma beam sprayed by the plasma nozzle is located at the contact point between the welding wire transported by the welding wire conduit and the welds of pipes A and B. However, this device requires relatively precise placement of the pipes during the installation of the computer monitor stand pipes, which is inconvenient to operate, thereby affecting the installation convenience of the device, and needs to be improved. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a computer display stand welding device in which a positioning roller for a pipe to be welded can automatically straighten, lift and dock the pipe to be welded during movement, thereby reducing the position requirements of operators when placing the pipe to be welded, thereby making it more labor-saving and convenient for operators to carry and place the pipe to be welded, thereby increasing the overall welding efficiency.

[0004] The purpose of the present invention is to be achieved through the following technical solutions: A computer display bracket welding device comprises a main support frame and a pipe to be welded. Bottom support seats are provided on both sides of the main support frame. Auxiliary straightening mechanisms are arranged on the sides of the main support frame. Centering positioning mechanisms are arranged on both sides of the auxiliary straightening mechanisms. The auxiliary straightening mechanisms control the centering positioning mechanisms to approach or move away from the pipe to be welded, thereby completing the loading or unloading of the pipe to be welded. The centering positioning mechanism clamps and positions the pipe to be welded, so that the pipes to be welded on both sides are in a state of overlapping central axes, and controls the pipes to be welded on both sides to move to the position to be welded. A girth welding mechanism is arranged on the top of the main support frame, and the girth welding mechanism performs pre-cleaning and welding operations on the pipe to be welded through a plasma welding head.

[0005] The auxiliary straightening mechanism includes a straightening drive hydraulic cylinder, a support roller, and a side movable support frame. The side movable support frame is arranged on the side of the main support frame. One side of the side movable support frame facing the main support frame has a moving frame positioning rod, and the inside of the main support frame has a moving frame positioning groove. The moving frame positioning groove is adapted to the moving frame positioning rod. The moving frame positioning groove is connected to the moving frame positioning rod, and the moving frame positioning rod slides inside the moving frame positioning groove. The bottom of the main support frame is fixedly connected to the straightening drive hydraulic cylinder, and the hydraulic rod of the straightening drive hydraulic cylinder is fixedly connected to the side movable support frame. The bottom of the side movable support frame has a support roller mounting groove, and the support roller mounting groove is rotationally connected to the support roller.

[0006] The centering positioning mechanism includes a positioning roller for the pipe to be welded, a locking chuck, a locking drive hydraulic cylinder, a displacement drive motor, a linear displacement gear, a centering mechanism bearing block, a bidirectional drive screw, a centering drive block, a driven traction ring, a traction connecting rod, a screw drive motor, and a driving traction ring. Both sides of the side movable support frame have side support frames. The middle of the side support frames has a middle positioning slideway and side positioning slideways. The middle positioning slideway is in the centering position, and the side positioning slideways are located on both sides of the middle positioning slideway. One side of the side positioning slideway facing the middle positioning slideway has a displacement drive rack. There are two groups of positioning mechanism bearing blocks arranged on each side positioning slideway. The positioning mechanism bearing blocks are adapted to the side positioning slideways. The positioning mechanism bearing blocks are connected to the side positioning slideways and slide on the outside of the side positioning slideways. One side of the positioning mechanism bearing block facing the middle positioning slideway has a displacement gear mounting platform, which is rotatably connected to the linear displacement gear. The linear displacement gear meshes with the displacement drive rack. The side of the displacement gear mounting platform has a displacement motor mounting platform. The displacement drive motor is inserted into the displacement motor mounting platform and fixed. The transmission shaft of the displacement drive motor is fixedly connected to the linear displacement gear. The side of the positioning mechanism bearing block has a positioning roller bearing groove. The side of the side positioning slideway is provided with a positioning claw. One side of the positioning claw facing the side positioning slideway has a claw rotating connection ring, which is rotatably connected to the positioning roller bearing groove. One side of the positioning claw facing the middle positioning slideway has a driven block bearing plate. The middle of the driven block bearing plate has a driven block bearing rod. Both sides of the driven block bearing rod have driven block mounting grooves, which are rotatably connected to the driven traction ring. The side of the driven traction ring has an outer traction rod connection block. The middle of the middle positioning slideway is provided with a centering mechanism bearing block. Both sides of the centering mechanism bearing block have middle positioning slideway connection grooves and bidirectional screw mounting grooves. The bidirectional screw mounting grooves are in the centering position, and the middle positioning slideway connection grooves are distributed on both sides of the bidirectional screw mounting grooves. The middle positioning slideway connection grooves are adapted to the middle positioning slideways. The middle positioning slideway connection grooves are connected to the middle positioning slideways and slide on the outside of the middle positioning slideways. Both sides of the bidirectional drive screw are rotatably connected to the bidirectional screw mounting grooves. The side of the bidirectional screw mounting groove has a screw motor mounting platform. The screw drive motor is inserted into the screw motor mounting platform and fixed. The transmission shaft of the screw drive motor is fixedly connected to the bidirectional drive screw. The middle of the centering mechanism bearing block has a centering block positioning slideway. Two groups of centering drive blocks are arranged in the middle of the centering block positioning slideway. The middle of the centering drive block has a screw connection block. Both sides of the centering drive block have centering block positioning sliders. The screw connection block is adapted to the bidirectional drive screw. The bidirectional drive screw is threadedly connected to the screw connection block. The centering block positioning sliders are adapted to the centering block positioning slideway. The centering block positioning sliders are connected to the centering block positioning slideway and slide on the outside of the centering block positioning slideway. The side of the centering block positioning slider has a driving traction ring mounting groove, and the driving traction ring is rotatably connected to the driving traction ring mounting groove. The side of the driving traction ring has an inner traction rod connection block. One side of the traction connecting rod is rotatably connected to the inner traction rod connection block.On the other side of the traction connecting rod, it is rotatably connected to the outer traction rod connecting block. On the side of the positioning claw away from the side positioning slideway, there is a positioning roller mounting table, and the positioning roller mounting table is rotatably connected to the positioning roller of the pipe to be welded. The positioning roller of the pipe to be welded is pressed against the outer surface of the pipe to be welded. On both sides of the positioning claw, there are locking block positioning chutes. Inside the positioning claw, there is a locking block. On both sides of the locking block, there are locking block positioning sliders. The locking block positioning sliders are adapted to the locking block positioning chutes. The locking block positioning sliders are connected to the locking block positioning chutes, and the locking block positioning sliders slide inside the locking block positioning chutes. On the side of the locking block positioning slider, there is a locking driven block. On both sides of the positioning claw, there are fixedly connected locking drive hydraulic cylinders. The hydraulic rods of the locking drive hydraulic cylinders are fixedly connected to the locking driven blocks. The locking block is pressed against the side of the positioning roller of the pipe to be welded.,

[0007] Advantages: 1. During the movement of the positioning roller of the pipe to be welded in the present invention, it can automatically straighten, lift, and dock the pipe to be welded, reducing the position requirements for the operator to place the pipe to be welded. Thus, it is more labor-saving and convenient for the operator to carry and place the pipe to be welded, increasing the overall welding efficiency.

[0008] 2. Before welding in the present invention, the high-pressure air jet cleaning gun can pre-clean the joint, thus blowing away dust, oil rust, etc. at the joint before welding, avoiding defects such as pores caused by the contamination of the weld seam by debris during the welding process, and thus increasing the subsequent welding quality.

[0009] 3. During the overall welding process of the present invention, the pipe to be welded remains stationary, and only the plasma welding head moves around the pipe to be welded for welding, effectively avoiding the generation of welding cracks caused by asynchronous movement of the pipe to be welded during the welding process.

[0010] 4. During the overall welding process of the present invention, only the plasma welding head moves. Compared with driving the relatively heavy pipe to be welded to rotate, only driving the plasma welding head to rotate makes the device consume less energy during the welding process, thus reducing the overall welding cost. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of a welding device for a computer monitor bracket according to the present invention.

[0012] Figure 2 It is a schematic bottom view structural diagram of a welding device for a computer monitor bracket according to the present invention.

[0013] Figure 3 It is a diagram of the state of the welding device for a computer monitor bracket according to the present invention before loading.

[0014] Figure 4 It is a partially enlarged view of the circumferential seam welding mechanism 4 according to the present invention.

[0015] Figure 5 This is the installation state diagram of the upright driving hydraulic cylinder described in the present invention.

[0016] Figure 6 This is the installation state diagram of the inner welding mechanism bearing ring described in the present invention.

[0017] Figure 7 This is the installation state diagram of the plasma welding head described in the present invention.

[0018] Figure 8 This is the side view cross-sectional diagram of a computer monitor bracket welding device described in the present invention.

[0019] Figure 9 This is the Figure 8 partial enlarged view described in the present invention.

[0020] Figure 10 This is the structural schematic diagram of the centering positioning mechanism described in the present invention.

[0021] Figure 11 This is the Figure 10 partial enlarged view described in the present invention.

[0022] Figure 12 This is the structural schematic diagram of the main support frame described in the present invention.

[0023] Figure 13 This is the partial enlarged view of the main support frame described in the present invention.

[0024] Figure 14 This is the structural schematic diagram of the side movable support frame described in the present invention.

[0025] Figure 15 This is the partial enlarged view of the side movable support frame described in the present invention.

[0026] Figure 16 This is the structural schematic diagram of the positioning mechanism bearing block described in the present invention.

[0027] Figure 17 This is the structural schematic diagram of the centering mechanism bearing block described in the present invention.

[0028] Figure 18 This is the structural schematic diagram of the centering drive block described in the present invention.

[0029] Figure 19 This is the structural schematic diagram of the positioning claw described in the present invention.

[0030] In the figure: main support frame 1; auxiliary alignment mechanism 2; centering positioning mechanism 3; circumferential seam welding mechanism 4; pipe to be welded 9; side support frame 11; middle positioning slideway 12; side positioning slideway 13; displacement drive rack 14; bottom support base 15; moving frame positioning groove 16; moving frame positioning rod 17; outer welding mechanism bearing ring 18; 19; inner welding mechanism bearing ring 20; alignment drive hydraulic cylinder 21; support roller mounting groove 22; support roller 23; circumferential seam welding drive gear 24; circumferential seam welding motor mounting platform 25; circumferential seam welding drive motor 26; welding head bearing platform 27; welding head bearing groove 28; welding head lifting hydraulic cylinder 29; plasma welding head 30; hydraulic cylinder docking platform 31; integrated pipe 32; outer integrated pipe mounting hole 33; inner integrated pipe mounting hole 34; cleaning gun mounting platform 35; cleaning gun lifting hydraulic cylinder 36; high-pressure air jet cleaning gun 37; positioning claw 38; locking driven block 39; pipe to be welded positioning roller 40; positioning roller mounting platform 41; locking block 42; locking drive hydraulic cylinder 43; claw rotating connection ring 44; locking block positioning slider 45; fixed tooth ring 46; positioning mechanism bearing block 54; positioning roller bearing groove 55; displacement drive motor 56; linear displacement gear 57; centering mechanism bearing block 58; middle positioning slideway connection groove 59; bidirectional screw mounting groove 60; bidirectional drive screw 61; centering drive block 62; screw connection block 63; centering block positioning slideway 64; centering block positioning slider 65; driven block bearing rod 66; driven block mounting groove 67; driven traction ring 68; traction connecting rod 69; inner traction rod connection block 70; outer traction rod connection block 71; locking block positioning chute 72; displacement motor mounting platform 73; displacement gear mounting platform 74; screw motor mounting platform 75; screw drive motor 76; driven block bearing plate 77; side movable support frame 78; active traction ring 79; main traction ring mounting groove 80; rotating gear bearing ring 181; integrated pipe bearing ring 182; rotating gear bearing groove 191; integrated pipe bearing groove 192; gear closing plate 201; integrated pipe closing plate 202; hollowing avoidance groove 203. Detailed implementation mode

[0031] The present invention will be further described in detail below with reference to the drawings and embodiments: Embodiment 1: A welding device for a computer monitor bracket, comprising a main support frame 1 and a pipe to be welded 9. The two sides of the main support frame 1 are provided with bottom support seats 15. An auxiliary alignment mechanism 2 is arranged on the side of the main support frame 1. Centering positioning mechanisms 3 are arranged on both sides of the auxiliary alignment mechanism 2. The auxiliary alignment mechanism 2 controls the centering positioning mechanisms 3 to approach or move away from the pipe to be welded 9, so as to complete the loading or unloading of the pipe to be welded 9. The centering positioning mechanisms 3 clamp and position the pipe to be welded 9, so that the pipes to be welded 9 on both sides are in a state where their central axes coincide, and control the pipes to be welded 9 on both sides to move to the welding position. A circumferential seam welding mechanism 4 is arranged on the top of the main support frame 1. The circumferential seam welding mechanism 4 performs pre-cleaning and welding operations on the pipe to be welded 9 through a plasma welding head 30.

[0032] Embodiment 2: The auxiliary alignment mechanism 2 of the present invention comprises an alignment driving hydraulic cylinder 21, a support roller 23, and a side movable support frame 78. A side movable support frame 78 is arranged on the side of the main support frame 1. One side of the side movable support frame 78 facing the main support frame 1 is provided with a moving frame positioning rod 17. The inside of the main support frame 1 is provided with a moving frame positioning groove 16. The moving frame positioning groove 16 is adapted to the moving frame positioning rod 17. The moving frame positioning groove 16 is connected to the moving frame positioning rod 17. The moving frame positioning rod 17 slides inside the moving frame positioning groove 16. The bottom of the main support frame 1 is fixedly connected to the alignment driving hydraulic cylinder 21. The hydraulic rod of the alignment driving hydraulic cylinder 21 is fixedly connected to the side movable support frame 78. The bottom of the side movable support frame 78 is provided with a support roller mounting groove 22. The support roller mounting groove 22 is rotatably connected to the support roller 23.

[0033] Embodiment 3: The centering positioning mechanism 3 of the present invention includes a positioning roller 40 for the pipe to be welded, a locking chuck 42, a locking drive hydraulic cylinder 43, a displacement drive motor 56, a linear displacement gear 57, a centering mechanism carrier block 58, a bidirectional drive screw 61, a centering drive block 62, a driven traction ring 68, a traction connecting rod 69, a screw drive motor 76, and a driving traction ring 79. Both sides of the side movable support frame 78 are provided with side support frames 11. The middle of the side support frame 11 is provided with a middle positioning slideway 12 and side positioning slideways 13. The middle positioning slideway 12 is in the centering position, and the side positioning slideways 13 are located on both sides of the middle positioning slideway 12. One side of the side positioning slideway 13 facing the middle positioning slideway 12 is provided with a displacement drive rack 14. Two groups of positioning mechanism carrier blocks 54 are arranged on each side positioning slideway 13. The positioning mechanism carrier block 54 is adapted to the side positioning slideway 13. The positioning mechanism carrier block 54 is connected to the side positioning slideway 13 and slides on the outside of the side positioning slideway 13. One side of the positioning mechanism carrier block 54 facing the middle positioning slideway 12 is provided with a displacement gear mounting platform 74. The displacement gear mounting platform 74 is rotatably connected to the linear displacement gear 57. The linear displacement gear 57 meshes with the displacement drive rack 14. The side of the displacement gear mounting platform 74 is provided with a displacement motor mounting platform 73. The displacement drive motor 56 is inserted into the displacement motor mounting platform 73 and fixed. The transmission shaft of the displacement drive motor 56 is fixedly connected to the linear displacement gear 57. The side of the positioning mechanism carrier block 54 is provided with a positioning roller bearing groove 55. The side of the side positioning slideway 13 is provided with a positioning claw 38. One side of the positioning claw 38 facing the side positioning slideway 13 is provided with a claw rotating connection ring 44. The claw rotating connection ring 44 is rotatably connected to the positioning roller bearing groove 55. One side of the positioning claw 38 facing the middle positioning slideway 12 is provided with a driven block bearing plate 77. The middle of the driven block bearing plate 77 is provided with a driven block bearing rod 66. Both sides of the driven block bearing rod 66 are provided with driven block mounting grooves 67. The driven block mounting grooves 67 are rotatably connected to the driven traction ring 68. The side of the driven traction ring 68 is provided with an outer traction rod connection block 71. The middle of the middle positioning slideway 12 is provided with a centering mechanism carrier block 58. Both sides of the centering mechanism carrier block 58 are provided with middle positioning slideway connection grooves 59 and bidirectional screw mounting grooves 60. The bidirectional screw mounting groove 60 is in the centering position, and the middle positioning slideway connection grooves 59 are distributed on both sides of the bidirectional screw mounting groove 60. The middle positioning slideway connection groove 59 is adapted to the middle positioning slideway 12. The middle positioning slideway connection groove 59 is connected to the middle positioning slideway 12 and slides on the outside of the middle positioning slideway 12. Both sides of the bidirectional drive screw 61 are rotatably connected to the bidirectional screw mounting grooves 60. The side of the bidirectional screw mounting groove 60 is provided with a screw motor mounting platform 75. The screw drive motor 76 is inserted into the screw motor mounting platform 75 and fixed. The transmission shaft of the screw drive motor 76 is fixedly connected to the bidirectional drive screw 61. The middle of the centering mechanism carrier block 58 is provided with a centering block positioning slideway 64. Two groups of centering drive blocks 62 are arranged in the middle of the centering block positioning slideway 64.The middle part of the center driving block 62 has a screw connection block 63. On both sides of the center driving block 62, there are center block positioning sliders 65. The screw connection block 63 is adapted to the bidirectional driving screw 61. The bidirectional driving screw 61 is threadedly connected to the screw connection block 63. The center block positioning slider 65 is adapted to the center block positioning slideway 64. The center block positioning slider 65 is connected to the center block positioning slideway 64. The center block positioning slider 65 slides on the outside of the center block positioning slideway 64. On the side surface of the center block positioning slider 65, there is a main traction ring mounting groove 80. The active traction ring 79 is rotatably connected to the main traction ring mounting groove 80. On the side surface of the active traction ring 79, there is an inner traction rod connection block 70. One side of the traction connecting rod 69 is rotatably connected to the inner traction rod connection block 70. The other side of the traction connecting rod 69 is rotatably connected to the outer traction rod connection block 71. On the side of the positioning claw 38 away from the side positioning slideway 13, there is a positioning roller mounting table 41. The positioning roller mounting table 41 is rotatably connected to the pipe to be welded positioning roller 40. The pipe to be welded positioning roller 40 is pressed against the outer surface of the pipe to be welded 9. On both sides of the positioning claw 38, there are locking block positioning chutes 72. Inside the positioning claw 38, there is a locking block 42. On both sides of the locking block 42, there are locking block positioning sliders 45. The locking block positioning sliders 45 are adapted to the locking block positioning chutes 72. The locking block positioning sliders 45 are connected to the locking block positioning chutes 72. The locking block positioning sliders 45 slide inside the locking block positioning chutes 72. On the side surface of the locking block positioning slider 45, there is a locking driven block 39. On both sides of the positioning claw 38, there are fixedly connected locking drive hydraulic cylinders 43. The hydraulic rods of the locking drive hydraulic cylinders 43 are fixedly connected to the locking driven block 39. The locking block 42 is pressed against the side surface of the pipe to be welded positioning roller 40.,

[0034] Furthermore, an operating method of a computer display stand welding device is provided. When the pipe 9 to be welded is not placed, the upper and lower positioning rollers 40 of the pipe to be welded are at the extreme positions away from each other, and the positioning roller 40 of the pipe to be welded at the bottom is in contact with the ground. After the pipe 9 to be welded is placed between the two sets of centering positioning mechanisms 3, the straightening driving hydraulic cylinder 21 drives the two sets of side movable support frames 78 to approach each other, and the side movable support frames 78 drive the centering positioning mechanism 3 to approach the pipe 9 to be welded. During the process of the centering positioning mechanism 3 approaching the pipe 9 to be welded, The positioning roller 40 of the pipe to be welded at the bottom first contacts the pipe 9 to be welded, and as the two sets of side movable support frames 78 continue to approach each other, the positioning rollers 40 of the pipe to be welded on both sides lift the pipe 9 to be welded. In this process, the pipe 9 to be welded is gradually straightened. At this time, the straightening drive hydraulic cylinder 21 stops working, and the screw drive motor 76 starts. The screw drive motor 76 drives the two-way drive screw 61 to rotate. When the two-way drive screw 61 rotates, it drives the two centering drive blocks 62 to approach each other. In the process of the centering drive block 62 approaching, the active The connecting rod mechanism composed of the traction ring 79, the traction connecting rod 69 and the driven traction ring 68 pulls the two positioning claws 38 closer to each other, so that the positioning roller 40 of the pipe to be welded at the bottom lifts the pipe 9 to be welded, and the positioning roller 40 of the pipe to be welded at the top continues to approach the pipe 9 to be welded, until the pipe 9 to be welded contacts with the four groups of positioning rollers 40 to be welded at the same time, and the pipe 9 to be welded is centered. According to the position of the pipe 9 to be welded, the displacement drive motor 56 is started, and the displacement drive motor 56 is connected to the linear displacement gear 57. The meshing between the displacement-driven racks 14 drives the centering positioning mechanism 3 and the pipe 9 to be welded to move as a whole along the side positioning slide 13, so that the pipes 9 to be welded on both sides are docked. After the docking of the pipes 9 to be welded is completed, the operator can freely rotate the pipes 9 to be welded according to needs to adjust the docking position of the pipes 9 to be welded. After the adjustment of the pipes 9 to be welded is completed, the locking drive hydraulic cylinder 43 drives the locking block 42 to press on the surface of the positioning roller 40 of the pipe to be welded, so that the positioning roller 40 of the pipe to be welded cannot rotate, so that the pipe 9 to be welded is completely fixed.

[0035] It should be noted that the positioning roller 40 for the pipe to be welded can automatically straighten, lift and dock the pipe to be welded 9 during movement, thereby reducing the position requirements for the operator when placing the pipe to be welded 9, thereby making it easier and more convenient for the operator to transport and place the pipe to be welded 9, thereby increasing the overall welding efficiency.

[0036] Embodiment 4: The circumferential seam welding mechanism 4 of the present invention includes a circumferential welding drive gear 24, a circumferential welding drive motor 26, a welding head lifting hydraulic cylinder 29, a plasma welding head 30, an integrated pipe 32, a cleaning gun lifting hydraulic cylinder 36, and a high-pressure air jet cleaning gun 37. The top of the main support frame 1 has an external welding mechanism bearing ring 18, which is composed of a rotating gear bearing ring 181 and an integrated pipe bearing ring 182. The rotating gear bearing ring 181 is located on the side of the integrated pipe bearing ring 182. The rotating gear bearing ring 181 has a rotating gear bearing groove 191 inside, and the integrated pipe bearing ring 182 has an integrated pipe bearing groove 192 inside. An internal welding mechanism bearing ring 20 is provided in the middle of the external welding mechanism bearing ring 18. One side of the internal welding mechanism bearing ring 20 has a gear closing plate 201, which is adapted to the rotating gear bearing groove 191. The gear closing plate 201 is connected to the rotating gear bearing groove 191 and slides inside the rotating gear bearing groove 191. A fixed tooth ring 46 is provided inside the rotating gear bearing groove 191. A circumferential welding motor mounting platform 25 is provided on the side of the gear closing plate 201. The circumferential welding drive motor 26 is inserted and fixed inside the circumferential welding motor mounting platform 25. The driving shaft of the circumferential welding drive motor 26 is fixedly connected to the circumferential welding drive gear 24, and the circumferential welding drive gear 24 meshes with the fixed tooth ring 46. The other side of the internal welding mechanism bearing ring 20 has an integrated pipe closing plate 202, which is adapted to the integrated pipe bearing groove 192. The integrated pipe closing plate 202 is connected to the integrated pipe bearing groove 192 and slides inside the integrated pipe bearing groove 192. A hollow avoidance groove 203 is provided inside the internal welding mechanism bearing ring 20, and multiple groups of hollow avoidance grooves 203 are evenly arranged around the internal welding mechanism bearing ring 20. A welding head bearing platform 27 is provided in the middle of one of the hollow avoidance grooves 203. A welding head bearing groove 28 is provided inside the welding head bearing platform 27. The welding head lifting hydraulic cylinder 29 is inserted and fixed inside the welding head bearing groove 28. A plasma welding head 30 is provided on the side of the welding head bearing platform 27. The central axis of the plasma welding head 30 intersects with the central axis of the pipe 9 to be welded. A hydraulic cylinder docking platform 31 is provided on the side of the plasma welding head 30. The top of the hydraulic rod of the welding head lifting hydraulic cylinder 29 is fixedly connected to the hydraulic cylinder docking platform 31. The top of the plasma welding head 30 is connected to the integrated pipe 32. The other side of the integrated pipe 32 sequentially passes through the internal integrated pipe mounting hole 34, the integrated pipe bearing groove 192, and the external integrated pipe mounting hole 33 and is connected to the power supply and gas supply mechanism. The integrated pipe 32 is coiled inside the integrated pipe bearing groove 192. A cleaning gun mounting platform 35 is provided in the middle of another hollow avoidance groove 203. The cleaning gun lifting hydraulic cylinder 36 is inserted and fixed inside the cleaning gun mounting platform 35. The bottom of the cleaning gun lifting hydraulic cylinder 36 has a hydraulic rod fixedly connected to the high-pressure air jet cleaning gun 37.

[0037] Further, after the positioning of the pipe 9 to be welded is completed, the cleaning gun lifting hydraulic cylinder 36 drives the high-pressure air jet cleaning gun 37 to approach the pipe 9 to be welded until the high-pressure air jet cleaning gun 37 moves to the cleaning predetermined position. The welding head lifting hydraulic cylinder 29 drives the plasma welding head 30 to approach the pipe 9 to be welded until the plasma welding head 30 moves to the welding predetermined position. After the plasma welding head 30 and the high-pressure air jet cleaning gun 37 are moved, the circumferential welding drive motor 26 is started. The circumferential welding drive motor 26 drives the circumferential welding drive gear 24 to rotate, so that the inner welding mechanism carrier ring 20 generally rotates around the pipe 9 to be welded. Synchronously, the high-pressure air jet cleaning gun 37 is started to clean the seam between the pipes 9 to be welded before welding. Synchronously, the plasma welding head 30 is started to perform circumferential seam welding on the seam between the pipes 9 to be welded. Until after the inner welding mechanism carrier ring 20 rotates one week, the circumferential seam welding of the pipe 9 to be welded is completed. The inner welding mechanism carrier ring 20, the plasma welding head 30, and the high-pressure air jet cleaning gun 37 retract in the reverse direction to the initial position for subsequent welding operations.

[0038] It should be noted that the high-pressure air jet cleaning gun 37 can pre-clean the seam before welding, so as to blow away dust, oil rust, etc. at the seam before welding, avoid defects such as pores caused by foreign matter contamination of the weld during welding, and thus improve the subsequent welding quality. The force application of the present invention is balanced to prevent the occurrence of welding beads or unevenness, and effectively prevent the danger of deformation caused by inaccurate welding or uneven weld seams. The automatic calibration of the pipe axis is synchronously completed during the lifting process, and the radial offset can be eliminated without an additional guiding device. At the same time, the problem of weld cracks caused by pipe vibration is eliminated. Traditional pre-cleaning requires a separate station, and the pipe may be re-contaminated due to pipe movement after cleaning. However, this device integrates cleaning and welding on the same rotation path, and the welded seam after cleaning is welded within 3 seconds, reducing the porosity defect rate. The high-pressure air jet cleaning gun 37 of the present invention is inclined, and the purging air flow not only removes impurities, but also forms a local air curtain on the surface of the weld to block the interference of external dust during welding, which is equivalent to a "dynamic protective gas shield", further improving the welding quality.

[0039] It should also be noted that during the overall welding process, the pipe 9 to be welded remains stationary, and only the plasma welding head 30 rotates around the pipe 9 to be welded for welding, effectively avoiding the generation of welding cracks caused by asynchronous movement of the pipe 9 to be welded during welding.

[0040] It should also be noted that only the plasma welding head 30 moves during the overall welding process. Compared with driving the pipe 9 to be welded with a large mass to rotate, only driving the plasma welding head 30 to rotate makes the device consume less energy during welding, thereby reducing the overall welding cost.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A computer display bracket welding device, characterized in that The invention comprises a main support frame (1), a pipe to be welded (9), and a plasma welding head (30). A girth welding mechanism (4) is arranged on the top of the main support frame (1). The girth welding mechanism (4) performs welding operation on the pipe to be welded (9) through the plasma welding head (30). Bottom support seats (15) are arranged on both sides of the main support frame (1). An auxiliary straightening mechanism (2) is arranged on the side of the main support frame (1). Centering positioning mechanisms (3) are arranged on both sides of the auxiliary straightening mechanism (2). The auxiliary straightening mechanism (2) controls the centering positioning mechanism (3) to approach or move away from the pipe to be welded (9), thereby completing the loading or unloading of the pipe to be welded (9). The centering positioning mechanism (3) clamps and positions the pipe to be welded (9), so that the pipes to be welded (9) on both sides are in a state where the central axes coincide, and controls the pipes to be welded (9) on both sides to move to the welding position.

2. A computer display bracket welding device according to claim 1, characterized in that The auxiliary righting mechanism (2) comprises a righting driving hydraulic cylinder (21), a support roller (23), and a side movable support frame (78). The side of the main support frame (1) is provided with a side movable support frame (78). The side of the side movable support frame (78) facing the main support frame (1) has a movable frame positioning rod (17). The main support frame (1) has a movable frame positioning groove (16) inside. The movable frame positioning groove (16) is adapted to the movable frame positioning rod (17). The movable frame positioning groove (16) is connected to the movable frame positioning rod (17). The movable frame positioning rod (17) slides inside the movable frame positioning groove (16). The bottom of the main support frame (1) is fixedly connected to the righting driving hydraulic cylinder (21). The hydraulic rod of the righting driving hydraulic cylinder (21) is fixedly connected to the side movable support frame (78). The bottom of the side movable support frame (78) has a support roller mounting groove (22). The support roller mounting groove (22) is rotatably connected to the support roller (23).

3. A computer display bracket welding device according to claim 2, characterized in that The centering positioning mechanism (3) comprises a positioning roller (40) for a pipe to be welded, a locking block (42), a locking driving hydraulic cylinder (43), a displacement driving motor (56), a linear displacement gear (57), a centering mechanism bearing block (58), a bidirectional driving screw (61), a centering driving block (62), a driven traction ring (68), a traction connecting rod (69), a screw driving motor (76), and an active traction ring (79). The two sides of the side movable support frame (78) are provided with side support frames (11), and the middle part of the side support frame (11) is provided with a center positioning slideway (12) and a side positioning slideway (13). The center positioning slideway (12) is located in a center position, and the side positioning slideways (13) are located on both sides of the center positioning slideway (12). The side positioning slideway (13) has a side facing the center positioning slideway (12). A displacement drive rack (14) is provided. Two groups of positioning mechanism bearing blocks (54) are provided on each side positioning slideway (13). The positioning mechanism bearing blocks (54) are adapted to the side positioning slideway (13). The positioning mechanism bearing blocks (54) are connected to the side positioning slideway (13). The positioning mechanism bearing blocks (54) slide on the outside of the side positioning slideway (13). A displacement gear mounting platform (74) is provided on the side of the positioning mechanism bearing block (54) facing the middle positioning slideway (12). The displacement gear mounting platform (74) is rotationally connected to a linear displacement gear (57). The linear displacement gear (57) is meshed with the displacement drive rack (14). A displacement motor mounting platform (73) is provided on the side of the displacement gear mounting platform (74). The displacement drive motor (56) is inserted into the displacement motor mounting platform (73) and fixed.

4. A computer display bracket welding device according to claim 2, characterized in that The displacement drive motor (56) has a transmission shaft fixedly connected to the linear displacement gear (57), the side of the positioning mechanism bearing block (54) has a positioning roller bearing groove (55), the side of the side positioning slideway (13) is provided with a positioning claw (38), the side of the positioning claw (38) facing the side positioning slideway (13) has a claw rotation connection ring (44), the claw rotation connection ring (44) is rotatably connected to the positioning roller bearing groove (55), the side of the positioning claw (38) facing the middle positioning slideway (12) has a driven block bearing plate (77), the middle of the driven block bearing plate (77) has a driven block bearing rod (66), both sides of the driven block bearing rod (66) have driven block mounting grooves (67), the driven block mounting grooves (67) are rotatably connected to the driven traction ring (68), and the side of the driven traction ring (68) has an external traction rod connection block (71).

5. A computer display bracket welding device according to claim 2, characterized in that A centering mechanism bearing block (58) is arranged in the middle of the centering mechanism bearing block (58), and both sides of the centering mechanism bearing block (58) are provided with a centering guideway connecting groove (59) and a bidirectional screw mounting groove (60), wherein the bidirectional screw mounting groove (60) is located in the center, and the centering guideway connecting groove (59) is distributed on both sides of the bidirectional screw mounting groove (60), and the centering guideway connecting groove (59) is adapted to the centering guideway (12), and the centering guideway connecting groove (59) is connected to the centering guideway (12), and the centering guideway connecting groove (59) slides on the outside of the centering guideway (12).

6. A computer display bracket welding device according to claim 2, characterized in that : The two sides of the bidirectional drive screw (61) are rotatably connected to the bidirectional screw mounting groove (60), the side of the bidirectional screw mounting groove (60) is provided with a screw motor mounting platform (75), the screw drive motor (76) is inserted into the screw motor mounting platform (75) and fixed, the screw drive motor (76) has a transmission shaft fixedly connected to the bidirectional drive screw (61), the centering mechanism bearing block (58) has a centering block positioning slideway (64) in the middle, the centering block positioning slideway (64) is provided with two sets of centering drive blocks (62) in the middle, the centering drive block (62) has a screw connecting block (63) in the middle, the centering drive block ( The center block positioning slider (65) is provided on both sides of the center block positioning slider (62), the screw connecting block (63) is adapted to the bidirectional drive screw (61), the bidirectional drive screw (61) is threadedly connected to the screw connecting block (63), the center block positioning slider (65) is adapted to the center block positioning slideway (64), the center block positioning slider (65) is connected to the center block positioning slideway (64), the center block positioning slider (65) slides outside the center block positioning slideway (64), the center block positioning slider (65) has a main traction ring mounting groove (80) on the side surface, and the active traction ring (79) is rotatably connected to the main traction ring mounting groove (80).

7. A computer display bracket welding device according to claim 2, characterized in that The active traction ring (79) has an inner traction rod connecting block (70) on its side, one side of the traction link (69) is rotatably connected to the inner traction rod connecting block (70), and the other side of the traction link (69) is rotatably connected to the outer traction rod connecting block (71). The positioning claw (38) has a positioning roller mounting platform (41) on the side away from the side positioning slideway (13). The positioning roller mounting platform (41) is rotatably connected to the positioning roller (40) of the pipe to be welded. The positioning roller (40) of the pipe to be welded is pressed against the outer surface of the pipe to be welded (9). The positioning claw (38) has locking block positioning grooves (72) on both sides. The positioning claw (38) is provided with a locking block (42) inside. ), the locking block (42) has locking block positioning sliders (45) on both sides, the locking block positioning sliders (45) are adapted to the locking block positioning chute (72), the locking block positioning sliders (45) are connected to the locking block positioning chute (72), the locking block positioning sliders (45) slide inside the locking block positioning chute (72), the locking block positioning sliders (45) have locking driven blocks (39) on the sides, the positioning claws (38) are fixedly connected to the locking driving hydraulic cylinder (43) on both sides, the locking driving hydraulic cylinder (43) has a hydraulic rod fixedly connected to the locking driven block (39), and the locking block (42) is pressed against the side of the positioning roller (40) of the pipe to be welded.

8. A computer display bracket welding device according to claim 1, characterized in that The circumferential seam welding mechanism (4) comprises a circumferential welding drive gear (24), a circumferential welding drive motor (26), a welding head lifting hydraulic cylinder (29), a plasma welding head (30), an integrated pipe (32), a cleaning gun lifting hydraulic cylinder (36), and a high-pressure jet cleaning gun (37). The top of the main support frame (1) is provided with an external welding mechanism bearing ring (18), the external welding mechanism bearing ring (18) is composed of a rotating gear bearing ring (181) and an integrated pipe bearing ring (182), the rotating gear bearing ring (181) is located on the side of the integrated pipe bearing ring (182), the rotating gear bearing ring (181) has a rotating gear bearing groove (191) inside, and the integrated pipe bearing ring (182) has a rotating gear bearing groove (191) inside. An integrated pipe bearing groove (192) is provided with an inner welding mechanism bearing ring (20) in the middle of the outer welding mechanism bearing ring (18), a gear closing plate (201) is provided on one side of the inner welding mechanism bearing ring (20), the gear closing plate (201) is adapted to the rotating gear bearing groove (191), the gear closing plate (201) is connected to the rotating gear bearing groove (191), the gear closing plate (201) slides inside the rotating gear bearing groove (191), a fixed gear ring (46) is provided inside the rotating gear bearing groove (191), a ring welding motor mounting platform (25) is provided on the side of the gear closing plate (201), and the ring welding drive motor (26) is inserted into the ring welding motor mounting platform (25) for fixing.

9. A computer display bracket welding device according to claim 2, characterized in that The ring welding drive motor (26) has a trigger shaft fixedly connected to the ring welding drive gear (24), the ring welding drive gear (24) is meshed with the fixed gear ring (46), the other side of the inner welding mechanism bearing ring (20) has an integrated pipe closing plate (202), the integrated pipe closing plate (202) is adapted to the integrated pipe bearing groove (192), the integrated pipe closing plate (202) is connected to the integrated pipe bearing groove (192), the integrated pipe closing plate (202) slides inside the integrated pipe bearing groove (192), the inner welding mechanism bearing ring (20) has a hollow avoidance groove (203), a plurality of groups of hollow avoidance grooves (203) are evenly arranged around the inner welding mechanism bearing ring (20), the middle part of the hollow avoidance groove (203) has a welding head bearing platform (27), the welding head bearing platform (27) has a welding head bearing groove (28), and the welding head lifting hydraulic cylinder (29) is inserted into the welding head bearing groove (28) and fixed.

10. A computer display bracket welding device according to claim 2, characterized in that A plasma welding head (30) is arranged on the side of the welding head bearing platform (27), the central axis of the plasma welding head (30) intersects with the central axis of the pipe (9) to be welded, the side of the plasma welding head (30) is provided with a hydraulic cylinder docking platform (31), the top of the hydraulic rod of the welding head lifting hydraulic cylinder (29) is fixedly connected to the hydraulic cylinder docking platform (31), the top of the plasma welding head (30) is connected to the integrated pipe (32), the other side of the integrated pipe (32) passes through the inner integrated pipe mounting hole (34), the integrated pipe bearing groove (192), and the outer integrated pipe mounting hole (33) in sequence and is connected to the power supply and gas supply mechanism, the integrated pipe (32) is coiled inside the integrated pipe bearing groove (192), and the middle of another hollow avoidance groove (203) is provided with a cleaning gun mounting platform (35), the cleaning gun lifting hydraulic cylinder (36) is inserted into the cleaning gun mounting platform (35) and fixed, and the bottom of the cleaning gun lifting hydraulic cylinder (36) is provided with a hydraulic rod fixedly connected to the high-pressure jet cleaning gun (37).

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