A device for flexible welding of a subway passenger room seat framework

Abstract

The utility model discloses a device for metro passenger room seat skeleton flexible welding relates to metro passenger room seat processing technical field, including two main body board and adjusting frame, be equipped with I -beam between two main body board, be equipped with linear track on I -beam, be equipped with the positioning template through sliding component sliding connection on linear track, be equipped with locating block on positioning template, install the first quick clamping and second quick clamping of workpiece clamping on locating block, be equipped with the adjusting mechanism for adjusting the height and angle of main body board on adjusting frame, the utility model discloses the locating block on positioning template and first quick clamping, second quick clamping cooperation, can realize the quick accurate positioning of metro passenger room seat skeleton multi -component, need not operating personnel repeatedly adjust component position, and the height and angle of main body board can be adjusted flexibly on adjusting mechanism of adjusting frame, and the welding operation space layout is optimized.

Description

Technical Field

[0001] This utility model relates to the field of subway passenger seat processing technology, specifically a device for flexible welding of subway passenger seat frames. Background Technology

[0002] As an important component of subway car interiors, subway seats primarily function to provide passengers with a comfortable resting place and a pleasant riding experience. Therefore, designing comfortable and safe subway seats is receiving increasing attention. The frame, as a crucial component of the seat, provides sufficient strength and rigidity, ensuring better safety for the subway seat.

[0003] The subway passenger seat frame is a multi-part assembly structure. Traditional manufacturing requires manual assembly of each component, with extremely high demands on the assembly sequence and fit of the parts to ensure the overall frame dimensions meet design standards (such as length, width, and hole spacing). Operators must repeatedly adjust component positions to avoid assembly deviations, resulting in assembly times of 30-60 minutes per session, severely restricting production cycle time. Furthermore, this method is highly dependent on the dimensional accuracy of component positioning surfaces. If a component positioning surface has a dimensional deviation of more than 0.1mm, critical dimensions of the frame after welding (such as seat spacing and mounting hole coaxiality) will exceed tolerances, requiring rework and further increasing production and time costs.

[0004] The average length of a subway passenger seat frame is approximately 3 meters. Traditional processing requires a separate rigid tooling table for each frame, typically 3.5-4 meters long, with ample space for welding operations (at least 0.8-1 meter on each side). Assuming a single production line processes 20 frames per day, this requires at least 150-200 square meters of production space. However, actual welding time at a single unit only accounts for 40%-50% of the total working hours, with the remaining time spent waiting for assembly or adjustments. This results in less than 50% space utilization, significantly limiting production line capacity expansion and optimized space layout. Therefore, those skilled in the art have developed a device for flexible welding of subway passenger seat frames to address the problems described in the background. Utility Model Content

[0005] The purpose of this invention is to provide a device for flexible welding of subway passenger seat frames, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An apparatus for flexible welding of subway passenger compartment seat frames, comprising:

[0008] Two main body plates are provided, and an I-beam is provided between the two main body plates. A linear track is provided on the I-beam. A positioning template is slidably connected to the linear track through a sliding component. A positioning block is provided on the positioning template. A first quick clamp and a second quick clamp for clamping the workpiece are installed on the positioning block.

[0009] An adjustment frame is provided, which is equipped with an adjustment mechanism for adjusting the height and angle of the main body plate.

[0010] Preferably, the sliding assembly includes a slider, a steel ball, a retainer, an internal sealing plate, and a bottom sealing plate. The slider is slidably connected to a linear track, the steel ball is disposed between the slider and the linear track, the retainer is used to hold the position of the steel ball, and the internal sealing plate and the bottom sealing plate are respectively disposed inside the slider and on the bottom surface.

[0011] Preferably, the sliding assembly further includes end caps, end face sealing sheets, and grease fittings. The end caps are disposed at both ends of the slider, the end face sealing sheets are disposed between the end caps and the slider, and the grease fittings are disposed on the slider.

[0012] Preferably, the first quick clamp includes a mounting block, a fixing member, a first rotating handle, a rotating member, and a pressure block. The mounting block is mounted on the positioning block, the fixing member is fixedly connected to the mounting block, the rotating member is rotatably connected to the mounting block, the first rotating handle is rotatably connected to the fixing member, and one end of the first rotating handle is rotatably connected to one end of the rotating member. The pressure block is fixedly connected to the end of the rotating member away from the first rotating handle, and the pressure block is in contact with the workpiece.

[0013] Preferably, the second quick clamp includes a second rotating handle, a mounting bracket, a sleeve, and a fixing rod. The mounting bracket is fixedly mounted on the positioning block, the sleeve is disposed on the mounting bracket, the second rotating handle is rotatably connected to the mounting bracket, the fixing rod is slidably connected inside the sleeve, one end of the second rotating handle is rotatably connected to one end of the fixing rod, and the end of the fixing rod away from the second rotating handle is in contact with the workpiece.

[0014] Preferably, the adjustment mechanism includes a connecting frame, a lifting frame, a first servo motor, and a bevel gear. The connecting frame is mounted on the main body plate, the output end of the first servo motor is connected to the bevel gear, the connecting frame and the lifting frame are rotatably connected by a rotating rod, the first servo motor is mounted on the lifting frame, and one side of the connecting frame is provided with a bevel tooth edge that meshes with the bevel gear.

[0015] Preferably, the adjustment mechanism further includes a second servo motor and a threaded rod, the threaded rod being rotatably connected to the adjustment frame, the second servo motor being mounted on the adjustment frame, and the output end of the second servo motor being connected to the threaded rod, and the lifting frame being threadedly connected to the threaded rod.

[0016] Preferably, a controller is installed on the adjustment frame, and the controller is electrically connected to the first servo motor and the second servo motor respectively.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model significantly improves production efficiency and ensures assembly accuracy, effectively solving the problems of low efficiency and reliance on component dimensions in traditional manual component positioning assembly. The device, through the cooperation of positioning blocks on the positioning template with the first and second quick clamps, enables rapid and accurate positioning of multiple components of the subway passenger seat frame. This eliminates the need for operators to repeatedly adjust component positions, drastically reducing assembly time from the traditional 30-60 minutes and significantly accelerating the production cycle. Simultaneously, the standardized positioning structure of the positioning template reduces reliance on the dimensional accuracy of component positioning surfaces. Even with slight dimensional deviations in component positioning surfaces, the constraint effect of the positioning blocks ensures that key dimensions of the frame after welding (such as seat spacing and mounting hole coaxiality) meet tolerances, reducing rework and lowering production and time costs.

[0019] 2. This utility model significantly improves the utilization rate of production sites, overcoming the limitations of traditional rigid tooling tables that occupy large spaces and restrict production capacity. The device utilizes a linear track and sliding components on the I-beam, allowing the positioning template to move flexibly along the track, eliminating the need for a separate 3.5-4 meter long rigid tooling table for each frame. Simultaneously, the adjustment mechanism on the adjustment frame can flexibly adjust the height and angle of the main plate, optimizing the welding operation space layout and avoiding the redundant occupation of 0.8-1 meter of operating space required on one side in traditional processing. Based on an average daily processing capacity of 20 frames per production line, the original 150-200㎡ production site area can be significantly reduced, and the idle time of tooling tables waiting for assembly or adjustment can be decreased, significantly improving site utilization from the traditional less than 50%, providing strong support for increasing production line capacity and optimizing space layout. Attached Figure Description

[0020] Figure 1 This is a schematic front view of a device for flexible welding of subway passenger compartment seat frames according to an embodiment of this application;

[0021] Figure 2 This is a side view of a device for flexible welding of subway passenger compartment seat frames according to an embodiment of this application.

[0022] Figure 3 This is a schematic diagram of the flexible welding device structure of a device for flexible welding of subway passenger compartment seat frames according to an embodiment of this application;

[0023] Figure 4This is a schematic diagram of the assembled structure of a device for flexible welding of subway passenger seat frames according to an embodiment of this application.

[0024] Figure 5 This is a schematic diagram of the first quick clamp structure of a device for flexible welding of subway passenger compartment seat frames according to an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of the second quick clamp structure of a device for flexible welding of subway passenger compartment seat frames according to an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of the sliding component structure of a device for flexible welding of subway passenger seat frames according to an embodiment of this application.

[0027] In the diagram: 1. Main body plate; 2. I-beam; 3. Linear track; 4. Positioning template; 5. Positioning block; 6. Adjusting frame; 7. Slider; 8. Steel ball; 9. Retainer; 10. Internal sealing plate; 11. Bottom sealing plate; 12. End cap; 13. End face sealing plate; 14. Grease nipple; 15. Mounting block; 16. Fixing component; 17. First rotating handle; 18. Rotating component; 19. Pressure block; 20. Second rotating handle; 21. Mounting frame; 22. Sleeve; 23. Fixing rod; 24. Connecting frame; 25. Lifting frame; 26. First servo motor; 27. Bevel gear; 28. Second servo motor; 29. ​​Threaded rod; 30. Controller. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-7 This utility model provides a technical solution:

[0030] An apparatus for flexible welding of subway passenger compartment seat frames, comprising:

[0031] Two main body plates 1 are provided, and an I-beam 2 is provided between the two main body plates 1. A linear track 3 is provided on the I-beam 2. A positioning template 4 is slidably connected to the linear track 3 through a sliding assembly. The sliding assembly includes a slider 7, a steel ball 8, a retainer 9, an internal sealing plate 10, and a bottom sealing plate 11. The slider 7 is slidably connected to the linear track 3. The steel ball 8 is located between the slider 7 and the linear track 3. The retainer 9 is used to hold the position of the steel ball 8. The internal sealing plate 10 and the bottom sealing plate 11 are respectively located inside the slider 7 and on the bottom surface. The sliding assembly also includes an end cap 12, an end face sealing plate 13, and a grease nipple 14. The end cap 12 is located at both ends of the slider 7. The end face sealing plate 13 is located between the end cap 12 and the slider 7. The grease nipple 14 is located on the slider 7. A positioning block 5 is provided on the positioning template 4. A first quick clamp and a second quick clamp for clamping the workpiece are installed on the positioning block 5.

[0032] Specifically, the first quick clamp includes a mounting block 15, a fixing member 16, a first rotating handle 17, a rotating member 18, and a pressure block 19. The mounting block 15 is mounted on the positioning block 5, the fixing member 16 is fixedly connected to the mounting block 15, the rotating member 18 is rotatably connected to the mounting block 15, the first rotating handle 17 is rotatably connected to the fixing member 16, and one end of the first rotating handle 17 is rotatably connected to one end of the rotating member 18. The pressure block 19 is fixedly connected to the end of the rotating member 18 away from the first rotating handle 17, and the pressure block 19 is in contact with the workpiece. The second quick clamp includes a second rotating handle 20, a mounting frame 21, a sleeve 22, and a fixing rod 23. The mounting frame 21 is fixedly mounted on the positioning block 5, the sleeve 22 is set on the mounting frame 21, the second rotating handle 20 is rotatably connected to the mounting frame 21, the fixing rod 23 is slidably connected inside the sleeve 22, one end of the second rotating handle 20 is rotatably connected to one end of the fixing rod 23, and the end of the fixing rod 23 away from the second rotating handle 20 is in contact with the workpiece.

[0033] The operator pushes the positioning template 4 at workstation 1, and the slider 7 of the sliding component slides along the linear track 3 on the I-beam 2. The sliding friction between the slider 7 and the track is converted into rolling friction by steel balls 8, and a retainer 9 stabilizes the position of the steel balls 8. Internal sealing plates 10, bottom sealing plates 11, and end sealing plates 13 (which work with end caps 12) prevent welding impurities, and grease nipples 14 inject grease to reduce wear. This sliding positioning principle allows the positioning template 4 to be easily moved to the target position, even when facing a 3-meter-long six-person seat frame. The frame component is then placed on the positioning block 5, and clamping is achieved through the lever principle of the first and second quick clamps: rotating the first handle 17 causes the pressure block 19 to press the workpiece, and rotating the second handle 20 pushes the fixing rod 23 to hold the workpiece in place. This double clamping ensures that the workpiece does not shift during welding. Compared to traditional manual positioning (which takes 30-60 minutes), this significantly shortens the clamping time and improves efficiency.

[0034] The adjustment frame 6 is equipped with an adjustment mechanism for adjusting the height and angle of the main body plate 1. The adjustment mechanism includes a connecting frame 24, a lifting frame 25, a first servo motor 26, and a bevel gear 27. The connecting frame 24 is mounted on the main body plate 1. The output end of the first servo motor 26 is connected to the bevel gear 27. The connecting frame 24 and the lifting frame 25 are rotatably connected via a rotating rod. The first servo motor 26 is mounted on the lifting frame 25. One side of the connecting frame 24 has a conical tooth edge that meshes with the bevel gear 27. The adjustment mechanism also includes a second servo motor 28 and a threaded rod 29. The threaded rod 29 is rotatably connected to the adjustment frame 6. The second servo motor 28 is mounted on the adjustment frame 6, and the output end of the second servo motor 28 is connected to the threaded rod 29. The lifting frame 25 is threadedly connected to the threaded rod 29.

[0035] In the above embodiment, a controller 30 is installed on the adjustment frame 6, and the controller 30 is electrically connected to the first servo motor 26 and the second servo motor 28 respectively.

[0036] For workstation 1, after the second servo motor 28 starts, it drives the threaded rod 29 to rotate. Since the lifting frame 25 is threadedly connected to the threaded rod 29, the lifting frame 25 moves linearly along the adjusting frame 6, driving the connecting frame 24 and the main body plate 1 to complete the height adjustment. Subsequently, the first servo motor 26 drives the main body plate 1 to adjust its angle around the rotating rod through the meshing of the bevel gear 27 and the bevel tooth edge of the connecting frame 24. This is the core working principle of the adjustment mechanism "servo motor-mechanical transmission", which can achieve precise control of height and angle and avoid the errors of traditional manual adjustment.

[0037] After clamping, the process enters a dual-station alternating welding and cooling phase. After welding at station 1, the angle or position of the main plate 1 is adjusted via an adjustment mechanism, allowing station 2 to rotate to the operating position for immediate welding. At this time, the workpiece at station 1 is idle, allowing for sufficient cooling during the welding time at station 2. This process follows the "cooling to prevent deformation principle": traditional single-station workpieces need to wait for cooling after welding, which can easily lead to deformation due to stress concentration. This device, however, utilizes the time difference between "station 2 welding - station 1 cooling" to allow the workpiece to fully release stress, reducing post-weld deformation, ensuring product accuracy, and lowering rework costs. After welding at station 2, the device is rotated back to station 1. By this time, the workpiece at station 1 has cooled, and a quick reverse clamping operation allows for removal, forming a cycle of "station 1 clamping - welding - station 2 welding - station 1 cooling removal." Simultaneously, the dual stations operate alternately within a 3-meter area, eliminating the need for redundant space for each workpiece as in traditional single-station systems. It also avoids tooling space occupation during model changes (model changes only require parameter adjustments to the controller), significantly improving space utilization.

[0038] Once a batch of processing is completed, the servo motor is controlled by the controller 30 to reverse, so that the dual-station main board 1 is reset and the positioning template 4 is pushed back to the initial end.

[0039] It should be noted that the specific models and specifications of the controller 30, the first servo motor 26, and the second servo motor 28 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for flexible welding of a subway passenger room seat framework, characterized in that, include: Two main body plates (1), an I-beam (2) is provided between the two main body plates (1), a linear track (3) is provided on the I-beam (2), a positioning template (4) is slidably connected on the linear track (3) through a sliding component, a positioning block (5) is provided on the positioning template (4), and a first quick clamp and a second quick clamp for clamping the workpiece are installed on the positioning block (5); An adjustment frame (6) is provided with an adjustment mechanism for adjusting the height and angle of the main body plate (1).

2. The device for flexible welding of the subway passenger room seat framework according to claim 1, characterized in that: The sliding assembly includes a slider (7), a steel ball (8), a retainer (9), an internal sealing plate (10), and a bottom sealing plate (11). The slider (7) is slidably connected to the linear track (3). The steel ball (8) is disposed between the slider (7) and the linear track (3). The retainer (9) is used to hold the position of the steel ball (8). The internal sealing plate (10) and the bottom sealing plate (11) are respectively disposed inside the slider (7) and on the bottom surface.

3. The device for flexible welding of the subway passenger room seat framework according to claim 2, characterized in that: The sliding assembly also includes an end cap (12), an end face sealing plate (13), and a grease nipple (14). The end cap (12) is disposed at both ends of the slider (7), the end face sealing plate (13) is disposed between the end cap (12) and the slider (7), and the grease nipple (14) is disposed on the slider (7).

4. The device for flexible welding of the subway passenger room seat framework according to claim 1, characterized in that: The first quick clamp includes a mounting block (15), a fixing member (16), a first rotating handle (17), a rotating member (18), and a pressure block (19). The mounting block (15) is mounted on the positioning block (5). The fixing member (16) is fixedly connected to the mounting block (15). The rotating member (18) is rotatably connected to the mounting block (15). The first rotating handle (17) is rotatably connected to the fixing member (16), and one end of the first rotating handle (17) is rotatably connected to one end of the rotating member (18). The pressure block (19) is fixedly connected to the end of the rotating member (18) away from the first rotating handle (17). The pressure block (19) is in contact with the workpiece.

5. The device for flexible welding of the subway passenger room seat framework according to claim 1, characterized in that: The second quick clamp includes a second rotating handle (20), a mounting bracket (21), a sleeve (22), and a fixing rod (23). The mounting bracket (21) is fixedly mounted on the positioning block (5), and the sleeve (22) is disposed on the mounting bracket (21). The second rotating handle (20) is rotatably connected to the mounting bracket (21), and the fixing rod (23) is slidably connected inside the sleeve (22). One end of the second rotating handle (20) is rotatably connected to one end of the fixing rod (23), and the end of the fixing rod (23) away from the second rotating handle (20) is in contact with the workpiece.

6. The device for flexible welding of the subway passenger room seat framework according to claim 1, characterized in that: The adjustment mechanism includes a connecting frame (24), a lifting frame (25), a first servo motor (26), and a bevel gear (27). The connecting frame (24) is mounted on the main body plate (1). The output end of the first servo motor (26) is connected to the bevel gear (27). The connecting frame (24) and the lifting frame (25) are rotatably connected by a rotating rod. The first servo motor (26) is mounted on the lifting frame (25). One side of the connecting frame (24) is provided with a conical tooth edge that meshes with the bevel gear (27).

7. The device for flexible welding of a subway passenger room seat framework according to claim 6, characterized in that: The adjustment mechanism also includes a second servo motor (28) and a threaded rod (29). The threaded rod (29) is rotatably connected to the adjustment frame (6). The second servo motor (28) is mounted on the adjustment frame (6), and the output end of the second servo motor (28) is connected to the threaded rod (29). The lifting frame (25) is threadedly connected to the threaded rod (29).

8. The device for flexible welding of a subway passenger room seat framework according to claim 7, characterized in that: A controller (30) is installed on the adjustment frame (6), and the controller (30) is electrically connected to the first servo motor (26) and the second servo motor (28).

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