Automatic welding equipment for office chair leg roller seat

Abstract

The utility model discloses automatic welding equipment for an office chair leg roller seat. The automatic welding equipment comprises a rack, the first rotating device is arranged on the rack; the welding workbench is arranged on the first rotating device, is used for bearing the office chair leg main body and can be driven by the first rotating device to drive the office chair leg main body to rotate; the vibration disc is arranged on one side of the rack and is used for conveying the roller seat; the material waiting positioning seat is arranged on the rack and is used for placing and positioning the roller seat; the first feeding device is arranged on the rack, receives the roller seats sent out by the vibration disc and conveys the roller seats to the material waiting positioning seat for positioning; the second feeding device is arranged on the rack and is used for placing the roller seat on the to-be-fed positioning seat on the office chair leg main body; and the welding device is arranged on the rack and is used for welding the joint of the roller seat and the office chair leg main body. Automatic welding of the roller seat and the office chair leg body is achieved, welding is efficient and stable, labor cost is saved, and industrial injury risks can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to an office chair foot roller seat automatic welding equipment. BACKGROUND

[0002] The office chair foot on the market is generally produced according to the forming process disclosed in the Chinese invention patent with the application number 202410663408.0, including a chair foot body formed by metal template stamping, the chair foot body includes a fixed part at the center, a plurality of support parts extending to the periphery of the fixed part and a mounting part at the extension end of the support part, a shaft sleeve in the form of a pipe is welded at the center of the fixed part, a roller seat is welded in the mounting part, a support inner bone is welded at the support part, and the two ends of the support inner bone are fixedly connected with the shaft sleeve and the roller seat by welding. At present, the roller seat fixed at the center of the chair foot body is generally welded manually by artificial, which not only is time-consuming and laborious, but also consumes high labor cost, and the overall efficiency is not high, the staff is also susceptible to strong light and dust to cause occupational diseases, and the welding quality is unstable, and manual welding is prone to unstable factors such as product appearance defect, virtual welding, delamination and missing welding.

[0003] Therefore, the utility model is just based on the above deficiencies. CONTENT OF UTILITY MODEL

[0004] The utility model aims at overcoming the defects of prior art, and provides an office chair foot roller seat automatic welding equipment which saves manpower and improves welding efficiency and quality.

[0005] The utility model is realized through the following technical schemes:

[0006] An office chair foot roller seat automatic welding equipment is characterized by:

[0007] The utility model discloses a kind of office chair foot roller seat automatic welding equipment, it is characterized by:

[0008] First rotating device 2 is arranged on the rack 1;

[0009] Welding workbench 3 is arranged on the first rotating device 2, for carrying office chair foot body and can be driven by first rotating device 2 to drive office chair foot body to rotate;

[0010] Vibration disc 4 is arranged on one side of the rack 1 and is used to convey roller seat;

[0011] Material positioning seat 5 is arranged on the rack 1 and is used to put roller seat into positioning;

[0012] First feeding device 6 is arranged on the rack 1 and receives roller seat sent by vibration disc 4 and conveys roller seat to material positioning seat 5 and positions;

[0013] A second feeding device 7 is arranged on the frame 1 and used to place the roller seat on the office chair leg body;

[0014] A welding device 8 is arranged on the frame 1 and used to weld the roller seat and the office chair leg body.

[0015] The office chair leg roller seat automatic welding equipment has the characteristics that the frame 1 is provided with a second rotating device 9, a flattening workbench 10 driven to rotate by the second rotating device 9, a transfer device 11 used to transfer the office chair leg body after welding to the roller seat to the flattening workbench 10, a first axial pressing positioning device 12 used to axially press and fix the office chair leg body on the flattening workbench 10, and a flattening device 13 used to flatten the roller seat on the office chair leg body.

[0016] The office chair leg roller seat automatic welding equipment has the characteristics that the first rotating device 2 and the second rotating device 9 are cam dividers, the frame 1 is provided with a first support frame 14 arranged on one side of the flattening workbench 10, the first axial pressing positioning device 12 comprises a first axial pressing cylinder 121 arranged vertically on the first support frame 14, a first rotating pressing disc 122 arranged on the piston rod of the first axial pressing cylinder 121 and driven by the first axial pressing cylinder 121 to move towards the flattening workbench 10 or away from the flattening workbench 10, and the flattening device 13 comprises a flattening cylinder 131 arranged vertically on the first support frame 14, and the flattening cylinder 131 is provided with a push rod 132 driven by the flattening cylinder 131 to extend towards the roller seat and flatten the roller seat on the office chair leg body.

[0017] The office chair leg roller seat automatic welding equipment has the characteristics that the first feeding device 6 comprises a mounting frame 61 arranged on the frame 1, a material arranging seat 62 arranged on the mounting frame 61 and connected with the vibration disc 4 to sequentially feed the roller seat, a sliding rail 63 arranged horizontally on the mounting frame 61, a sliding block 64 arranged on the sliding rail 63 in a sliding manner, a first pushing cylinder 65 driven to horizontally move the sliding block 64 along the sliding rail 63, a second pushing cylinder 66 arranged vertically on the sliding block 64, a connecting block 67 driven by the second pushing cylinder 66 to move up and down relative to the mounting frame 61, and a first clamping cylinder 68 arranged on the connecting block 67 and used to place the roller seat on the material arranging seat 62 on the office chair leg body positioning seat 5.

[0018] The office chair leg roller seat automatic welding equipment has the characteristics that the frame 1 is provided with a second support frame 15 arranged on one side of the welding workbench 3, and the second support frame 15 is provided with a second axial pressing positioning device 16 used to axially press and fix the office chair leg body on the welding workbench 3.

[0019] The office chair roller seat automatic welding equipment as described above, characterized in that: the second pressing positioning device 16 comprises a second pressing cylinder 161 vertically arranged on the second support frame 15, a second rotating pressure plate 162 rotatably arranged on the piston rod of the second pressing cylinder 161 and driven by the second pressing cylinder 161 to move towards or away from the welding workbench 3.

[0020] The office chair roller seat automatic welding equipment as described above, characterized in that: the second feeding device 7 comprises a second jaw cylinder 71 capable of clamping the roller seat from the standby material positioning seat 5, a vertical driving mechanism 72 driving the second jaw cylinder 71 to move up and down, and a translation driving mechanism 73 driving the second jaw cylinder 71 to move horizontally above the standby material positioning seat 5 or above the welding workbench 3.

[0021] The office chair roller seat automatic welding equipment as described above, characterized in that: the translation driving mechanism 73 comprises a first guide rail seat 731 arranged on the second support frame 15, a first guide rail 732 transversely arranged on the first guide rail seat 731, a first sliding table 733 slidably arranged on the first guide rail 732, a first lead screw nut seat 734 fixed on the first sliding table 733, a first lead screw 735 arranged in parallel with the first guide rail 732 and passing through the first lead screw nut seat 734, and a first motor 736 driving the first lead screw 735 to rotate, so that the first lead screw nut seat 734 moves along the first lead screw 735, thereby driving the first sliding table 733 to move horizontally, the vertical driving mechanism 72 comprises a second guide rail seat 721 arranged on the first sliding table 733, a second guide rail 722 vertically arranged on the second guide rail seat 721, a second sliding table 723 slidably arranged on the second guide rail 722, a second lead screw nut seat 724 fixed on the second sliding table 723, a second lead screw 725 arranged in parallel with the second guide rail 722 and passing through the second lead screw nut seat 724, and a second motor 726 driving the second lead screw 725 to rotate, so that the second lead screw nut seat 724 moves along the second lead screw 725, thereby driving the second sliding table 723 to move up and down, and the second jaw cylinder 71 is installed on the second sliding table 723.

[0022] The automatic welding equipment for office chair leg roller seats as described above is characterized in that: the welding device 8 includes a third guide rail seat 81 mounted on the second support frame 15, a third guide rail 82 vertically mounted on the third guide rail seat 81, a third slide table 83 slidably mounted on the third guide rail 82, a third lead screw nut seat 84 fixed on the third slide table 83, a third lead screw 85 parallel to the third guide rail 82 and mounted on the third lead screw nut seat 84, a third motor 86 that drives the third lead screw 85 to rotate, causing the third lead screw nut seat 84 to move along the third lead screw 85 and thus driving the third slide table 83 to move up and down, and a welding torch 87 mounted on the third slide table 83.

[0023] The automatic welding equipment for office chair leg casters described above is characterized in that: the transfer device 11 includes a fourth guide rail seat 111 extending from the welding worktable 3 towards the flattening worktable 10; a push screw 112 supported below the fourth guide rail seat 111 and capable of moving up and down relative to the frame 1, which drives the fourth guide rail seat 111 to rise and fall; a fifth motor 113 mounted on the frame 1; a connecting shaft 115 driven by the fifth motor 113 to rotate and, during rotation, drives the push screw 112 to move up and down via a connecting gear set 114; and a shaft along the length of the fourth guide rail seat 111. The system includes a fourth guide rail 116, a fourth slide 117 slidably mounted on the fourth guide rail 116, a fourth lead screw nut seat 118 fixed on the fourth slide 117, a fourth lead screw 119 parallel to the fourth guide rail 116 and mounted on the fourth lead screw nut seat 118, a fourth motor 110 that drives the fourth lead screw 119 to rotate, causing the fourth lead screw nut seat 118 to move along the fourth lead screw 119 and thus driving the fourth slide 117 to move horizontally, and a carrying block 1171 mounted on the fourth slide 117 that can support the main body of the office chair leg after the welded roller seat.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. After the main body of the office chair leg is placed on the welding workbench, this utility model uses a vibratory feeder to transport the roller seats to the first feeding device. The first feeding device positions the roller seats sequentially on the waiting positioning seats to prevent misalignment during vibratory feeding. Then, the second feeding device places the roller seats on the waiting positioning seats onto the main body of the office chair leg. Next, the welding device welds the roller seats to the main body of the office chair leg. After one roller seat is welded, the first rotating device drives the welding workbench to rotate, moving the support leg of one of the roller seats to be welded to the welding station. The aforementioned feeding and welding steps are repeated, realizing the automatic welding of the roller seats to the main body of the office chair leg. The welding is efficient and stable, saving time and effort, reducing labor costs, and helping to reduce production costs and ensure product quality. Moreover, automated production avoids the radiation and harm to employees from the strong light and fumes of welding, minimizing the risk of workplace injuries.

[0026] 2、The utility model discloses still set up the pressure flat device and press flat office chair foot main body on the roller seat, avoid the welding tin cold shrink after spot welding operation and make the roller seat rise and affect the follow -up reinforcement welding. [BRIEF DESCRIPTION OF DRAWINGS]

[0027] Figure 1 Is the exploded view of office chair foot main body and roller seat;

[0028] Figure 2 It is the perspective drawing of the utility model;

[0029] Figure 3 It is the structural diagram of the first pressure tight positioning device and pressure flat device installed in the first support frame;

[0030] Figure 4 It is the structural diagram of the first feeding device of the utility model;

[0031] Figure 5 It is the structural diagram of the second pressure tight positioning device, second feeding device and welding device installed in the second support frame;

[0032] Figure 6 It is the structural diagram of the welding workbench, pressure flat workbench and transfer device on the rack of the utility model;

[0033] Figure 7 It is the front view of the welding workbench, pressure flat workbench and transfer device on the rack of the utility model. [DETAILED DESCRIPTION]

[0034] The utility model will be further described in connection with the drawings:

[0035] As Figures 2 to 7As shown, an office chair foot roller seat automatic welding equipment, including rack 1; First rotating device 2, it is established in the rack 1; Welding workbench 3, it is established in the first rotating device 2, for carrying office chair foot body and can be driven by the first rotating device 2 to drive office chair foot body rotation; Vibration disc 4, it is established in the rack 1 one side and is used to transport roller seat; The positioning seat 5 for the material to be placed, it is established in the rack 1 and is used to place roller seat; First feeding device 6, it is established in the rack 1 and is connected vibration disc 4 sent out roller seat and transports roller seat to the positioning seat 5 on the positioning seat; Second feeding device 7, it is established in the rack 1 and is used to place roller seat on the positioning seat 5 on office chair foot body; Welding device 8, it is established in the rack 1 and is used to weld at the joint of roller seat and office chair foot body. Specifically, the welding workbench has a groove for office chair foot body clamping positioning. After office chair foot body is placed on the welding workbench, the utility model transports roller seat to the first feeding device by vibration disc, the first feeding device places roller seat on the positioning seat in sequence to prevent the misplacement of the vibration disc feeding, then the second feeding device places roller seat on the positioning seat on office chair foot body, and then the welding device welds at the joint of roller seat and office chair foot body. When a roller seat is welded, the first rotating device drives the welding workbench to rotate to make the foot of a roller seat to be welded on office chair foot body move to the welding station, and the foregoing feeding and welding steps are repeated, so that the automatic welding of roller seat and office chair foot body is realized. The welding is efficient and stable, time and labor are saved, labor cost is saved, production cost is reduced, product quality is guaranteed, automatic production avoids the radiation and harm of welding strong light and smoke to employees, and the risk of work injury is minimized.

[0036] Further, the rack 1 is provided with a second rotating device 9, a flattening workbench 10 driven by the second rotating device 9 to rotate, a transfer device 11 for transferring the office chair foot body after welding to the flattening workbench 10, a first pressing positioning device 12 for axially pressing and fixing the office chair foot body on the flattening workbench 10, and a flattening device 13 for flattening the roller seat on the office chair foot body. The above welding is spot welding. When spot welding is completed, the transfer device 11 moves the office chair foot body with the welded roller seat to the flattening workbench 10, and then the first pressing positioning device 12 axially presses and fixes the office chair foot body on the flattening workbench 10 to avoid the office chair foot body from shaking and moving when rotating. Finally, the flattening device 13 flattens the roller seat on the office chair foot body to prevent the roller seat from being raised due to the cold shrinkage of the solder after spot welding, which affects the subsequent reinforcement welding. When a roller seat is flattened, the second rotating device drives the flattening workbench 10 to rotate to make the foot of a roller seat to be flattened on the office chair foot body move to the flattening station, and the foregoing flattening steps are repeated.

[0037] As Figure 3 shown, the first rotating device 2 and the second rotating device 9 are cam dividers, the frame 1 is provided with a first support frame 14 on one side of the flattening workbench 10, the first pressing positioning device 12 comprises a first pressing cylinder 121 vertically arranged on the first support frame 14, a first rotating pressing plate 122 arranged on the piston rod of the first pressing cylinder 121 in a rotatable manner and driven by the first pressing cylinder 121 to move towards the flattening workbench 10 or away from the flattening workbench 10. After the office chair leg body is placed on the flattening workbench 10, the first pressing cylinder 121 drives the first rotating pressing plate 122 to move downward to press and position the office chair leg body on the flattening workbench 10, facilitating the smooth operation of the subsequent flattening roller seat work; the first rotating pressing plate 122 is reset after welding.

[0038] The flattening device 13 comprises a flattening cylinder 131 vertically arranged on the first support frame 14, and a push rod 132 arranged on the flattening cylinder 131 and driven by the flattening cylinder 131 to extend towards the roller seat to flatten the roller seat on the office chair leg body; the push rod 132 is reset after flattening.

[0039] As Figure 4 shown, the first feeding device 6 comprises a mounting frame 61 arranged on the frame 1, a discharging seat 62 arranged on the mounting frame 61 and connected with the vibration disc 4 for the roller seat to enter in sequence, a sliding rail 63 horizontally arranged on the mounting frame 61, a sliding block 64 arranged on the sliding rail 63 in a slidable manner, a first pushing cylinder 65 driving the sliding block 64 to move horizontally along the sliding rail 63, a second pushing cylinder 66 vertically arranged on the sliding block 64, a connecting block 67 driven by the second pushing cylinder 66 to move up and down relative to the mounting frame 61, a first jaw cylinder 68 arranged on the connecting block 67 and capable of placing the roller seat on the discharging seat 62 on the material waiting positioning seat 5 one by one, and the material waiting positioning seat 5 is also arranged on the mounting frame 61. Figure 1As shown, the roller seat 30 is cover-shaped, and has a connecting pipe in the middle for connecting the roller, and the material positioning seat 5 is provided with a boss matched with the roller seat 30 for covering the roller seat 30, and the boss is provided with a positioning hole for inserting and positioning the connecting pipe. Specifically, the two clamping jaws of the first clamping cylinder 68 are provided with half cylinders, and the two half cylinders constitute a cylinder which can be inserted into the connecting pipe, and then the two clamping jaws are opened to the two sides to make the two half cylinders abut against the inner wall of the connecting pipe, so that the roller seat 30 is firmly locked on the clamping jaw and can move with the first clamping cylinder 68. When the roller seat 30 needs to be positioned on the material positioning seat 5, the first pushing cylinder 65 drives the second pushing cylinder 66 to drive the first clamping cylinder 68 to move to one side of the discharging seat 62, the second pushing cylinder 66 drives the first clamping cylinder 68 to move downward, then the clamping jaws of the first clamping cylinder 68 lock the roller seat 30, then the second pushing cylinder 66 drives the first clamping cylinder 68 to move upward to take away the roller seat 30 from the discharging seat 62, the first pushing cylinder 65 drives the second pushing cylinder 66 to drive the first clamping cylinder 68 to move to one side of the material positioning seat 5, and finally the second pushing cylinder 66 drives the first clamping cylinder 68 to move downward to position the roller seat 30 on the material positioning seat 5.

[0040] As shown in the drawings, Figure 2 As shown, the rack 1 is provided with a second support frame 15 located on one side of the welding workbench 3, and the second support frame 15 is provided with a second pressing positioning device 16 for pressing and fixing the office chair leg body axially on the welding workbench 3.

[0041] Specifically, the second pressing positioning device 16 includes a second pressing cylinder 161 vertically arranged on the second support frame 15, and a second rotating pressure plate 162 rotatably arranged on the piston rod of the second pressing cylinder 161 and driven by the second pressing cylinder 161 to move towards or away from the welding workbench 3. When the office chair leg body is placed on the welding workbench 3, the second pressing cylinder 161 drives the second rotating pressure plate 162 to move downward to press and position the office chair leg body on the welding workbench 3, facilitating the smooth progress of subsequent welding roller seat work.

[0042] Specifically, the second feeding device 7 includes a second clamping cylinder 71 capable of clamping the roller seat from the material positioning seat 5, a vertical driving mechanism 72 driving the second clamping cylinder 71 to move up and down, and a translation driving mechanism 73 driving the second clamping cylinder 71 to move horizontally above the material positioning seat 5 or above the welding workbench 3. When the second clamping cylinder 71 clamps the center pipe, the vertical driving mechanism 72 drives the second clamping cylinder 71 to move upward, then the translation driving mechanism 73 drives the second clamping cylinder 71 to move horizontally above the welding workbench 3, and finally the second clamping cylinder 71 places the roller seat 30 on the office chair leg body 20; when the feeding is completed, the second clamping cylinder 71 is reset above the material positioning seat 5.

[0043] Specifically, the horizontal driving mechanism 73 comprises a first guide rail base 731 arranged on the second support frame 15, a first guide rail 732 arranged transversely on the first guide rail base 731, a first sliding table 733 slidably arranged on the first guide rail 732, a first screw nut base 734 fixed on the first sliding table 733, a first screw rod 735 arranged in parallel with the first guide rail 732 and passing through the first screw nut base 734, and a first motor 736 driving the first screw rod 735 to rotate so as to drive the first screw nut base 734 to move along the first screw rod 735 and drive the first sliding table 733 to move horizontally. The vertical driving mechanism 72 comprises a second guide rail base 721 arranged on the first sliding table 733, a second guide rail 722 arranged vertically on the second guide rail base 721, a second sliding table 723 slidably arranged on the second guide rail 722, a second screw nut base 724 fixed on the second sliding table 723, a second screw rod 725 arranged in parallel with the second guide rail 722 and passing through the second screw nut base 724, and a second motor 726 driving the second screw rod 725 to rotate so as to drive the second screw nut base 724 to move along the second screw rod 725 and drive the second sliding table 723 to move up and down. The second clamping jaw cylinder 71 is arranged on the second sliding table 723. Through the above structure, the second clamping jaw cylinder 71 can move up and down and horizontally, and move flexibly between the material positioning seat 5 and the welding workbench 3.

[0044] Specifically, the welding device 8 comprises a third guide rail base 81 arranged on the second support frame 15, a third guide rail 82 arranged vertically on the third guide rail base 81, a third sliding table 83 slidably arranged on the third guide rail 82, a third screw nut base 84 fixed on the third sliding table 83, a third screw rod 85 arranged in parallel with the third guide rail 82 and passing through the third screw nut base 84, a third motor 86 driving the third screw rod 85 to rotate so as to drive the third screw nut base 84 to move along the third screw rod 85 and drive the third sliding table 83 to move up and down, and a welding torch 87 arranged on the third sliding table 83. Through the above structure, the welding torch 87 can move up and down, which is convenient for moving down to the working position for welding and moving up to reset.

[0045] As Figure 6 and Figure 7As shown, the transfer device 11 comprises a fourth guide rail base 111 extending from the welding workbench 3 to the flattening workbench 10, a push screw 112 supported below the fourth guide rail base 111 and capable of moving up and down relative to the rack 1 to drive the fourth guide rail base 111 to lift, a fifth motor 113 arranged on the rack 1, a connecting rotating shaft 115 driven to rotate by the fifth motor 113 and capable of driving the push screw 112 to move up and down through a meshing gear set 114 when rotating, a fourth guide rail 116 arranged along the length direction of the fourth guide rail base 111, a fourth sliding table 117 slidably arranged on the fourth guide rail 116, a fourth screw nut base 118 fixed on the fourth sliding table 117, a fourth screw rod 119 arranged in parallel with the fourth guide rail 116 and sleeved on the fourth screw nut base 118, a fourth motor 110 driving the fourth screw rod 119 to rotate to drive the fourth sliding table 117 to move horizontally, and a carrying block 1171 arranged on the fourth sliding table 117 and capable of carrying the office chair leg body behind the welding roller base. The meshing gear set 114 comprises a plurality of meshing gears, an input gear arranged on the connecting rotating shaft 115 and an output gear meshing with the push screw 112, when the fifth motor 113 drives the connecting rotating shaft 115 to rotate, the meshing gear set 114 is driven to move up and down, thereby driving the push screw 112 to move up and down to lift or lower the fourth guide rail base 111. In the initial state, the carrying block 1171 is below the office chair leg body, after the roller base is spot-welded on the office chair leg body, under the driving of the fifth motor 113, the fourth guide rail base 111 moves up to make the carrying block 1171 move up to support the office chair leg body, then the fourth motor 110 works to drive the fourth screw rod 119 to rotate to drive the fourth sliding table 117 to move horizontally to make the carrying block 1171 with the office chair leg body come to the flattening workbench 10, finally under the driving of the fifth motor 113, the fourth guide rail base 111 moves down to make the office chair leg body fall on the flattening workbench 10 to be positioned for flattening.

Claims

1. An automatic welding device for office chair foot roller seat, characterized in that: it comprises a frame (1); a first rotating device (2) arranged on the frame (1); a welding workbench (3) arranged on the first rotating device (2) and used for carrying an office chair foot body and driven by the first rotating device (2) to rotate the office chair foot body; a vibrating disc (4) arranged on one side of the frame (1) and used for conveying roller seats; a standby positioning seat (5) arranged on the frame (1) and used for positioning the roller seats; a first feeding device (6) arranged on the frame (1) and receiving the roller seats conveyed by the vibrating disc (4) and conveying the roller seats to the standby positioning seat (5); a second feeding device (7) arranged on the frame (1) and used for placing the roller seats on the office chair foot body; and a welding device (8) arranged on the frame (1) and used for welding the roller seats and the office chair foot body. The frame (1) is provided with a second rotating device (9), a flattening workbench (10) driven by the second rotating device (9) to rotate, a transfer device (11) used for conveying the office chair foot body after welding the roller seat to the flattening workbench (10), a first pressing positioning device (12) used for pressing the office chair foot body axially on the flattening workbench (10), and a flattening device (13) used for flattening the roller seat on the office chair foot body. The first rotating device (2) and the second rotating device (9) are cam dividers, the frame (1) is provided with a first support frame (14) arranged on one side of the flattening workbench (10), the first pressing positioning device (12) comprises a first pressing cylinder (121) arranged vertically on the first support frame (14), a first rotating pressing disc (122) arranged rotatably on a piston rod of the first pressing cylinder (121) and driven by the first pressing cylinder (121) to move towards or away from the flattening workbench (10), and the flattening device (13) comprises a flattening cylinder (131) arranged vertically on the first support frame (14), the flattening cylinder (131) is provided with a push rod (132) driven by the flattening cylinder (131) to extend towards the roller seat and flatten the roller seat on the office chair foot body. ​ ​ ​ ​ ​ ​ 2. The office chair foot roller assembly automatic welding apparatus of claim 1, wherein: ​ 3. The office chair foot roller assembly automatic welding apparatus of claim 2, wherein: ​ 4. The office chair foot roller assembly automatic welding apparatus of claim 1, wherein: The first feeding device (6) comprises a mounting frame (61) arranged on the frame (1), a row of material seats (62) arranged on the mounting frame (61) and connected with the vibration disc (4) for sequentially entering the roller seats, a slide rail (63) horizontally arranged on the mounting frame (61), a sliding block (64) arranged on the slide rail (63) in a sliding manner, a first pushing cylinder (65) for driving the sliding block (64) to move horizontally along the slide rail (63), a second pushing cylinder (66) vertically arranged on the sliding block (64), a connecting block (67) driven by the second pushing cylinder (66) to move up and down relative to the mounting frame (61), and a first clamping cylinder (68) arranged on the connecting block (67) and capable of placing the roller seats on the row of material seats (62) on the material positioning seat (5) one by one.

5. The office chair foot roller assembly automatic welding apparatus of claim 1, wherein: The frame (1) is provided with a second support frame (15) located on one side of the welding workbench (3), and the second support frame (15) is provided with a second pressing positioning device (16) for axially pressing and fixing the office chair leg body on the welding workbench (3).

6. The office chair foot roller assembly automatic welding apparatus of claim 5, wherein: The second pressing positioning device (16) comprises a second pressing cylinder (161) vertically arranged on the second support frame (15), and a second rotating pressure disc (162) rotatably arranged on a piston rod of the second pressing cylinder (161) and driven by the second pressing cylinder (161) to move towards or away from the welding workbench (3).

7. The office chair foot roller assembly automatic welding apparatus of claim 5, wherein: The second feeding device (7) comprises a second clamping cylinder (71) capable of clamping the roller seat from the material positioning seat (5), a vertical driving mechanism (72) for driving the second clamping cylinder (71) to move up and down, and a translation driving mechanism (73) for driving the second clamping cylinder (71) to move horizontally above the material positioning seat (5) or above the welding workbench (3).

8. The office chair foot roller assembly automatic welding apparatus of claim 7, wherein: The horizontal driving mechanism (73) comprises a first guide rail base (731) arranged on the second support frame (15), a first guide rail (732) arranged transversely on the first guide rail base (731), a first sliding table (733) slidably arranged on the first guide rail (732), a first screw nut base (734) fixed on the first sliding table (733), a first screw rod (735) arranged in parallel with the first guide rail (732) and penetrating through the first screw nut base (734), and a first motor (736) driving the first screw rod (735) to rotate so as to drive the first screw nut base (734) to move along the first screw rod (735) and drive the first sliding table (733) to move horizontally.

9. The office chair foot roller seat automatic welding apparatus according to claim 5, characterized in that: The welding device (8) comprises a third guide rail base (81) arranged on the second support frame (15), a third guide rail (82) arranged vertically on the third guide rail base (81), a third sliding table (83) slidably arranged on the third guide rail (82), a third screw nut base (84) fixed on the third sliding table (83), a third screw rod (85) arranged in parallel with the third guide rail (82) and penetrating through the third screw nut base (84), a third motor (86) driving the third screw rod (85) to rotate so as to drive the third screw nut base (84) to move along the third screw rod (85) and drive the third sliding table (83) to move vertically, and a welding gun (87) arranged on the third sliding table (83). The horizontal driving mechanism (73) comprises a first guide rail base (731) arranged on the second support frame (15), a first guide rail (732) arranged transversely on the first guide rail base (731), a first sliding table (733) slidably arranged on the first guide rail (732), a first screw nut base (734) fixed on the first sliding table (733), a first screw rod (735) arranged in parallel with the first guide rail (732) and penetrating through the first screw nut base (734), and a first motor (736) driving the first screw rod (735) to rotate so as to drive the first screw nut base (734) to move along the first screw rod (735) and drive the first sliding table (733) to move horizontally. The welding device (8) comprises a third guide rail base (81) arranged on the second support frame (15), a third guide rail (82) arranged vertically on the third guide rail base (81), a third sliding table (83) slidably arranged on the third guide rail (82), a third screw nut base (84) fixed on the third sliding table (83), a third screw rod (85) arranged in parallel with the third guide rail (82) and penetrating through the third screw nut base (84), a third motor (86) driving the third screw rod (85) to rotate so as to drive the third screw nut base (84) to move along the third screw rod (85) and drive the third sliding table (83) to move vertically, and a welding gun (87) arranged on the third sliding table (83).

10. The office chair foot roller assembly automatic welding apparatus of claim 2, wherein: The transport device (11) comprises a fourth guide rail base (111) extending from the welding workbench (3) to the flattening workbench (10), a push screw (112) supported below the fourth guide rail base (111) and capable of driving the fourth guide rail base (111) to move up and down relative to the rack (1), a fifth motor (113) arranged on the rack (1), a connecting rotating shaft (115) driven to rotate by the fifth motor (113) and capable of driving the push screw (112) to move up and down through the engagement gear set (114) during rotation, a fourth guide rail (116) arranged along the length direction of the fourth guide rail base (111), a fourth sliding table (117) slidably arranged on the fourth guide rail (116), a fourth screw nut base (118) fixed on the fourth sliding table (117), a fourth screw rod (119) arranged in parallel with the fourth guide rail (116) and sleeved on the fourth screw nut base (118), a fourth motor (110) driving the fourth screw rod (119) to rotate so that the fourth screw nut base (118) moves along the fourth screw rod (119) to drive the fourth sliding table (117) to move horizontally, and a load block (1171) arranged on the fourth sliding table (117) and capable of bearing the office chair leg body behind the welding roller base.

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