A welding device for car seat side panel bracket nuts

Abstract

This utility model relates to a welding device for the nut of a car seat side panel bracket, belonging to the field of car seat welding. It includes a frame, a side panel positioning mechanism, a welding machine, a nut positioning mechanism base, a lower electrode, and a lower electrode seat. The side panel positioning mechanism includes a contour positioning plate. The upper electrode seat is fixedly connected to the piston rod of a hydraulic cylinder. The upper electrode is connected to the lower part of the upper electrode seat. The nut positioning mechanism includes a slider, a first guide rod seat, an adjustable positioning block, and a nut positioning rod. A lower electrode hole is opened on the lower electrode seat. The lower electrode is inserted into the lower electrode hole. The workpiece contact portion has a first plane and a second plane. The upper and lower electrodes are electrically connected to the welding machine. Because the workpiece contact portion of the lower electrode has a first plane and a second plane, without significantly reducing the contact area between the lower electrode and the workpiece, it effectively avoids contact between the workpiece contact portion of the lower electrode and the two reinforcing ribs of the bracket, thereby preventing current shunting and improving welding stability.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat welding, and in particular to a welding device for automotive seat side panel bracket nuts. Background Technology

[0002] The side panel bracket of the car seat has a through hole, and a nut needs to be welded above this hole. This nut is typically welded using resistance welding with upper and lower electrodes. In existing technology, the lower electrode is round, while the side panel bracket usually has two reinforcing ribs. The round lower electrode is prone to contacting these ribs, causing current shunting and reducing welding stability. Furthermore, the nut is usually placed manually on the upper part of the side panel bracket by a worker, and their concentricity is visually assessed. Although the diameter of the through hole in the bracket is larger than the diameter of the nut's threaded hole, as the upper electrode is pressed down, the concentricity between the through hole and the nut may change significantly. This can prevent the threaded rod from passing smoothly through the through hole in the bracket during subsequent processes, resulting in rework and wasted costs. Summary of the Invention

[0003] This utility model addresses the shortcomings of existing technologies by developing a welding device for the nuts of a car seat side panel bracket. The technical solution adopted by this utility model is: a welding device for the nuts of a car seat side panel bracket, characterized by comprising a frame 1, a side panel positioning mechanism 2, a welding machine 3, a nut positioning mechanism 10 base 16, a lower electrode 17, and a lower electrode seat 18; the frame 1 is fixedly connected to the base 16; the side panel positioning mechanism 2 includes a contour positioning plate 4; a first positioning pin 6, a second positioning pin 9, and a first magnet 21 are fixedly disposed within the contour positioning plate 4; the lower end of a second guide rod 19 is fixedly connected to the base 16, and its upper end is inserted into the contour positioning plate 4; a second spring 20 is sleeved on the second guide rod 19; a hydraulic cylinder 5 is fixedly disposed at the lower part of the frame 1; an upper electrode seat 7 is fixedly connected to the piston rod of the hydraulic cylinder 5; an upper electrode 8 is connected to the lower part of the upper electrode seat 7; the nut positioning mechanism 10 includes a slider 11, a first guide rod seat 13, an adjustable positioning block 15, and... Nut positioning rod 25; the adjustable positioning block 15 is disposed on the base 16; the first guide rod seat 13 is connected to the adjustable positioning block 15; the first guide rod 14 is fixedly connected to the first guide rod seat 13; the slider 11 is slidably connected to the first guide rod 14; the nut positioning rod is fixedly connected to the slider 11; a second magnet 26 is fixedly disposed inside the front end of the nut positioning rod; a first spring 12 is sleeved on the first guide rod 14; the lower electrode seat 18 is fixedly disposed on the base 16; a lower electrode hole 22 is opened on the lower electrode seat 18; the lower electrode 17 includes a workpiece contact part 23 and an insertion part 24; the insertion part 24 is inserted into the lower electrode hole 22; the workpiece contact part 23 has a first plane 30 and a second plane 31; the upper electrode 8 and the lower electrode 17 are respectively electrically connected to the welding machine 3.

[0004] The advantages of this utility model are as follows: Since the workpiece contact part of the lower electrode has a first plane and a second plane, without significantly reducing the contact area between the lower electrode and the workpiece, the contact between the workpiece contact part of the lower electrode and the two reinforcing ribs of the bracket is effectively avoided, thereby avoiding current shunting and improving welding stability; Since the nut positioning mechanism has a nut positioning rod, the worker places the nut at the front end of the nut positioning rod, and the nut is attracted and positioned by the second magnet. As the upper electrode is pressed down, the nut positioning rod also moves downward, ensuring the relative position of the nut and the bracket is stable, avoiding rework caused by a large difference in concentricity between the two, which would prevent the threaded rod from being installed, and improving production efficiency. Attached Figure Description

[0005] Figure 1 This is a schematic diagram of the main structure of a welding device for a car seat side panel bracket nut according to the present invention;

[0006] Figure 2 yes Figure 1 A schematic diagram of the structure of the contour positioning plate in the diagram;

[0007] Figure 3 yes Figure 1 A top view of the structure of the lower electrode holder in the middle;

[0008] Figure 4 yes Figure 1 A schematic diagram of the structure of the lower electrode in the middle;

[0009] Figure 5 yes Figure 1 A top view of the structure of the lower electrode in the middle;

[0010] Figure 6 yes Figure 1 A top view of the nut positioning rod structure;

[0011] Figure 7 This is a front view schematic diagram of the seat side panel after it has been fitted with the contour positioning plate of this utility model and positioned.

[0012] Figure 8 This is a front view schematic diagram of the state when the nut is installed into the nut positioning rod of this utility model;

[0013] Figure 9 This is a top view of the state when the nut is inserted into the nut positioning rod of this utility model;

[0014] Figure 10 This is a front view schematic diagram of the state when the upper electrode of this utility model is pressed down to complete the welding process;

[0015] Figure 11 This is a magnified front view schematic diagram of the state when the lower electrode of this utility model is in contact with the support.

[0016] In the diagram: 1. Frame; 2. Side plate positioning mechanism; 3. Welding machine; 4. Contouring positioning plate; 5. Hydraulic cylinder; 6. First positioning pin; 7. Upper electrode seat; 8. Upper electrode; 9. Second positioning pin; 10. Nut positioning mechanism; 11. Slider; 12. First spring; 13. First guide rod seat; 14. First guide rod; 15. Adjustable positioning block; 16. Base; 17. Lower electrode; 18. Lower electrode seat; 19. Second guide rod; 20. Second spring; 21. First magnet; 22. Lower electrode hole; 23. Workpiece contact part; 24. Insertion part; 25. Nut positioning rod; 26. Second magnet; 27. Seat side plate; 28. Bracket; 29. ​​Nut; 30. First plane; 31. Second plane. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] like Figures 1 to 6 As shown, the present invention discloses a welding device for welding nuts on a car seat side panel bracket, comprising: a welding device for welding nuts on a car seat side panel bracket, characterized in that it includes a frame 1, a side panel positioning mechanism 2, a welding machine 3, a nut positioning mechanism 10 base 16, a lower electrode 17, and a lower electrode seat 18; the frame 1 is fixedly connected to the base 16; the side panel positioning mechanism 2 includes a contour positioning plate 4; a first positioning pin 6, a second positioning pin 9, and a first magnet 21 are fixedly disposed inside the contour positioning plate 4; the lower end of a second guide rod 19 is fixedly connected to the base 16, and its upper end is inserted into the contour positioning plate 4; a second spring 20 is sleeved on the second guide rod 19; a hydraulic cylinder 5 is fixedly disposed at the lower part of the frame 1; an upper electrode seat 7 is fixedly connected to the piston rod of the hydraulic cylinder 5; an upper electrode 8 is connected to the lower part of the upper electrode seat 7; the nut positioning mechanism 10 includes a slider 11, a first guide rod seat 13, and a... The adjustable positioning block 15 and the nut positioning rod 25 are provided; the adjustable positioning block 15 is disposed on the base 16; the first guide rod seat 13 is connected to the adjustable positioning block 15; the first guide rod 14 is fixedly connected to the first guide rod seat 13; the slider 11 is slidably connected to the first guide rod 14; the nut positioning rod is fixedly connected to the slider 11; a second magnet 26 is fixedly disposed inside the front end of the nut positioning rod; a first spring 12 is sleeved on the first guide rod 14; the lower electrode seat 18 is fixedly disposed on the base 16; a lower electrode hole 22 is opened on the lower electrode seat 18; the lower electrode 17 includes a workpiece contact part 23 and an insertion part 24; the insertion part 24 is inserted into the lower electrode hole 22; the workpiece contact part 23 has a first plane 30 and a second plane 31; the upper electrode 8 and the lower electrode 17 are electrically connected to the welding machine 3 respectively.

[0019] In specific operations, such as Figures 7 to 9 As shown, the worker first places the seat side panel 27 into the contour positioning plate 4, and uses the first positioning pin 6 and the second positioning pin 9 to position the seat side panel 27. Then the worker places the nut 29 at the front end of the nut positioning rod 25, and the second magnet 26 attracts the nut 29. This step completes the pre-welding positioning process of the seat side panel 27 and the nut 29.

[0020] like Figure 10 and Figure 11As shown, the worker operates the piston rod of hydraulic cylinder 5 to press down, and the upper electrode 8 and lower electrode 17 press the bracket 28 and nut 29 from above and below, respectively. At this time, welding machine 3 works to complete the welding. During the downward pressing of the upper electrode 8, the contour positioning plate 4 can move downward along the second guide rod 19 to avoid workpiece deformation; the slider 11 can also move downward along the first guide rod 14 to ensure that the relative position of nut 29 and bracket 28 does not change significantly. Figure 11 As shown in the figure, the first plane 30 and the second plane 31 on both sides of the workpiece contact portion 23 of the lower electrode 17 can effectively avoid contact with the reinforcing ribs of the bracket 28, and effectively avoid current shunting without significantly reducing the contact area between the lower electrode and the bracket.

[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the scope of protection of the present utility model.

Claims

1. A welding device for nut on a car seat side panel bracket, characterized in that, The system includes a frame (1), a side plate positioning mechanism (2), a welding machine (3), a nut positioning mechanism (10), a base (16), a lower electrode (17), and a lower electrode seat (18); the frame (1) is fixedly connected to the base (16); the side plate positioning mechanism (2) includes a contour positioning plate (4); a first positioning pin (6), a second positioning pin (9), and a first magnet (21) are fixedly installed inside the contour positioning plate (4); the lower end of the second guide rod (19) is fixedly connected to the base (16). The upper end of the spring is inserted into the contour positioning plate (4); the second spring (20) is sleeved on the second guide rod (19); the hydraulic cylinder (5) is fixedly installed in the lower part of the frame (1); the upper electrode seat (7) is fixedly connected to the piston rod of the hydraulic cylinder (5); the upper electrode (8) is connected to the lower part of the upper electrode seat (7); the nut positioning mechanism (10) includes a slider (11), a first guide rod seat (13), an adjustable positioning block (15) and a nut positioning rod (25); the adjustable positioning block (15) ...) and the second guide rod (25) is inserted into the contour positioning plate (4); the second guide rod (20) is sleeved on the second guide rod (19); the second guide rod (20) is fixedly installed in the lower part of the frame (1); the upper electrode seat (7) is The positioning block (15) is set on the base (16); the first guide rod seat (13) is connected to the adjustable positioning block (15); the first guide rod (14) is fixedly connected to the first guide rod seat (13); the slider (11) is slidably connected to the first guide rod (14); the nut positioning rod is fixedly connected to the slider (11); a second magnet (26) is fixedly installed inside the front end of the nut positioning rod; a first spring (12) is sleeved on the first guide rod (14); the lower electrode seat (18) is fixedly set on the base (16); a lower electrode hole (22) is opened on the lower electrode seat (18); the lower electrode (17) includes a workpiece contact part (23) and an insertion part (24); the insertion part (24) is inserted into the lower electrode hole (22); the workpiece contact part (23) has a first plane (30) and a second plane (31); the upper electrode (8) and the lower electrode (17) are electrically connected to the welding machine (3) respectively.

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