Automatic bonding system for vehicle door sealing strip

Abstract

The invention discloses a vehicle door sealing strip automatic bonding system which comprises a sealing strip unwinding mechanism, a sealing strip temporary storage mechanism, a robot and a sealing strip bonding mechanism. The sealing strip caching mechanism is mounted on a frame; the sealing strip unwinding mechanism is arranged at the feeding end of the sealing strip temporary storage mechanism, and the robot is arranged at the discharging end of the sealing strip temporary storage mechanism. The sealing strip bonding mechanism is installed at the operation end of the robot. The device is high in automation degree, and the bonding quality and consistency are improved; the production flexibility is improved, and the remodeling cost is reduced; continuous production is achieved, and shutdown caused by material changing is avoided; and the sealing strip is protected through precise tension and track control.

Description

Technical Field

[0001] This invention relates to the technical field of door sealing strip bonding, and in particular to an automatic door sealing strip bonding system. Background Technology

[0002] Door sealing strips can be installed in several ways: adhesive, embedded, clip-on, and inlaid. Currently, the adhesive process for door sealing strips mainly uses manual rolling or semi-automatic disc-type adhesive equipment. Manual rolling is done manually, which can lead to uneven pressure from the operator, causing the sealing strip to stretch and deform. It can also result in unevenness at the bonding point, causing the sealing strip to twist and affecting the bonding quality, thus reducing the appearance of the door. Disc-type sealing strip adhesive equipment involves manually clamping the ring-shaped sealing strip around the adhesive disc, using a semi-automatic method to bond the sealing strip to the door. However, each time a door is bonded, the sealing strip needs to be manually placed before automatic bonding. Each disc-type sealing strip adhesive equipment is only compatible with a single car model, resulting in low automation flexibility. Traditional robotic door-handling systems combined with standing constant-force sealing strip adhesive equipment require the development of specialized grippers for each car model, and changing the gripper when switching car models requires readjustment. Summary of the Invention

[0003] In view of this, in order to solve the above problems, the purpose of this invention is to provide an automatic bonding system for vehicle door sealing strips, comprising: Sealing strip unwinding mechanism, sealing strip buffer mechanism, robot, sealing strip bonding mechanism; The sealing strip buffer mechanism is mounted on a frame; The sealing strip unwinding mechanism is located at the feeding end of the sealing strip buffer mechanism, and the robot is located at the discharging end of the sealing strip buffer mechanism; The sealing strip bonding mechanism is installed on the operating end of the robot.

[0004] The aforementioned automatic bonding system for car door sealing strips includes a sealing strip unwinding mechanism comprising: a motor rotation feeding assembly, a cylinder clamping assembly, and a frame positioning roller conveyor; the two frame positioning roller conveyors are arranged in parallel, and the motor rotation feeding assembly and the cylinder clamping assembly are respectively located on opposite sides of the two frame positioning roller conveyors.

[0005] The aforementioned automatic door sealing strip bonding system includes a sealing strip buffer mechanism comprising: an unwinding and feeding oscillating wheel assembly, a sealing strip buffer wheel assembly, a heating mechanism, and a robot trajectory buffer wheel assembly. The unwinding and feeding oscillating wheel assembly is rotatably mounted on the frame, the sealing strip buffer wheel assembly is mounted on the frame, the heating mechanism is mounted on the frame and is located close to the sealing strip buffer wheel assembly, and the robot trajectory buffer wheel assembly is slidably mounted on the frame. The unwinding and feeding oscillating wheel assembly is positioned close to the sealing strip unwinding mechanism, and the robot trajectory buffer wheel assembly is positioned close to the robot.

[0006] The aforementioned automatic bonding system for car door sealing strips includes an unwinding and feeding oscillating wheel assembly comprising: a mounting frame, oscillating wheels, and limiting rings; the mounting frame is rotatably mounted on the frame, a plurality of limiting rings are mounted on the side of the mounting frame near the sealing strip unwinding mechanism, a plurality of oscillating wheels are mounted on the upper end of the mounting frame, and a limiting ring is correspondingly provided between each pair of adjacent oscillating wheels.

[0007] In the aforementioned automatic door sealing strip bonding system, a slide rail is longitudinally mounted on the side of the frame near the robot, the robot trajectory buffer wheel assembly is rotatably mounted on a sliding frame, and the sliding frame is slidably mounted on the slide rail.

[0008] The aforementioned automatic door sealing strip bonding system includes a sealing strip bonding mechanism comprising: a strip unloading roller assembly, a strip feeding assembly, a corner buffer assembly, and a strip bonding assembly. The strip unloading roller assembly is mounted to the operating end of the robot via a mounting shaft. The strip feeding assembly and the strip bonding assembly are mounted on a mounting frame. The mounting frame is mounted to the operating end of the robot via a constant force floating assembly. The corner buffer assembly is mounted to the mounting frame via a valve island assembly. The inlet end of the corner buffer assembly faces the strip feeding assembly, and the outlet end of the corner buffer assembly faces the strip bonding assembly.

[0009] The aforementioned automatic door sealing strip bonding system includes a strip feeding assembly comprising: a strip guide wheel, a main drive wheel, a main drive clamping assembly, a first drive mechanism, and a flip detection assembly. The strip guide wheel is laterally mounted on one end of the mounting frame near the strip unloading roller assembly along its diameter. The main drive wheel is longitudinally mounted on the outer wall of the mounting frame along its diameter. The main drive clamping assembly is mounted on the outer wall of the mounting frame and is positioned opposite to the outer wall of the main drive wheel. The first drive mechanism is mounted on the inner wall of the mounting frame, and its output shaft is mounted on the main drive wheel. The flip detection assembly is mounted on the mounting frame and is located on the side of the main drive wheel away from the strip guide wheel.

[0010] The aforementioned automatic door sealing strip bonding system includes a strip bonding assembly comprising: a main feed wheel, a second drive mechanism, a feed wheel clamping assembly, a release liner peeling assembly, a strip cutting assembly, a cutter limiting assembly, and a bonding assembly. The main feed wheel and the feed wheel clamping assembly are mounted on the outer wall of the mounting frame, and are arranged opposite to each other. The second drive mechanism is mounted on the inner wall of the mounting frame, and its output shaft is mounted on the main feed wheel. The release liner peeling assembly, the strip cutting assembly, and the cutter limiting assembly are all mounted on the outer wall of the mounting frame. The release liner peeling assembly is located between the main feed wheel and the cutter limiting assembly. The strip cutting assembly matches the cutter limiting assembly. The bonding assembly is mounted on the side of the mounting frame away from the corner buffer assembly.

[0011] The aforementioned automatic bonding system for car door sealing strips includes a bonding component comprising: a roller head, which is rotatably mounted on a mounting frame, the outer circumferential surface of the roller head having a toothed structure, and the outer side wall of the roller head having an inwardly recessed annular clearance groove.

[0012] The aforementioned automatic door sealing strip bonding system includes a corner buffer assembly comprising an upper cover plate, a lower cover plate, a first roller group, and a second roller group. The upper cover plate and the lower cover plate are both installed on the valve island assembly. The upper cover plate and the lower cover plate are connected through the first roller group and the second roller group, and a buffer channel is formed between the first roller group and the second roller group.

[0013] The positive effects of the above technical solution compared with the existing technology are: 1. High degree of automation, improving bonding quality and consistency: This invention, through a robot in conjunction with a sealing strip bonding mechanism, achieves automated feeding, fixed-length cutting, release paper peeling, and roller bonding of the door sealing strip, replacing traditional manual rolling or semi-automatic clamping methods. This eliminates problems such as sealing strip stretching deformation, twisting, and uneven bonding caused by uneven hand force during manual operation, ensuring the smoothness and tightness of the sealing strip bonding, thereby significantly improving the sealing performance and appearance quality of the door.

[0014] 2. Improved production flexibility and reduced changeover costs: Compared to disc bonding equipment where each set of equipment corresponds to only a single car model, this invention, based on robot trajectory motion, can be adapted to the door bonding requirements of different car models simply by changing the program. Compared to the traditional method of using robots to hold car doors, which requires the development of dedicated grippers and involves complex switching and debugging, this system adopts a more versatile bonding mechanism, significantly reducing downtime and debugging time when changing car models and improving the automation flexibility of the production line.

[0015] 3. Enables continuous production and avoids downtime for material changes: By setting up a sealing strip buffer mechanism, the system can continuously perform bonding operations using the sealing strips stored in the buffer mechanism when the sealing strip roll is being changed in the unwinding mechanism. This eliminates the need to interrupt the production process while waiting for material changes, effectively improving production efficiency. Simultaneously, the buffer mechanism, in conjunction with the heating mechanism, ensures that the sealing strip is fed at a constant temperature, guaranteeing the stability of the material's physical properties.

[0016] 4. Precise tension and trajectory control to protect the sealing strip: The system adjusts the ratio of feed speed and discharge speed in real time through the corner buffer component, and combined with the follow-up design of the robot trajectory buffer wheel group, it effectively avoids instantaneous pulling or accumulation of the sealing strip during the robot's rapid turning or acceleration and deceleration, preventing deformation or damage to the sealing strip and ensuring the stability of the bonding process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an automatic bonding system for car door sealing strips according to the present invention.

[0018] Figure 2 This is a schematic diagram of the sealing strip unwinding mechanism in this invention.

[0019] Figure 3 This is a schematic diagram of the sealing strip buffer mechanism in this invention.

[0020] Figure 4 This is a schematic diagram of the sealing strip bonding mechanism in this invention.

[0021] Figure 5 This is a schematic diagram of the rubber strip unloading roller assembly in this invention.

[0022] Figure 6 This is a schematic diagram of the adhesive strip feeding assembly in this invention.

[0023] Figure 7 This is a schematic diagram of the corner buffer component in this invention.

[0024] Figures 8 to 10 This is a schematic diagram of the adhesive strip bonding assembly in this invention.

[0025] Figure 11 This is a schematic diagram of the rolling head in this invention.

[0026] Figure 12 This is a cross-sectional view of the rolling head in this invention.

[0027] Figure 13 This is a top view of the rolling head in this invention.

[0028] 1. Sealing strip unwinding mechanism; 11. Motor rotation feed assembly; 12. Cylinder clamping assembly; 13. Frame positioning roller conveyor; 2. Sealing strip buffer mechanism; 21. Unwinding feed swing wheel assembly; 211. Mounting frame; 212. Swing wheel; 213. Limiting ring; 22. Sealing strip buffer wheel assembly; 23. Heating mechanism; 24. Robot trajectory buffer wheel assembly; 241. Slide rail; 242. Sliding frame; 3. Robot; 4. Sealing strip bonding mechanism; 41. Adhesive strip unloading roller assembly; 42. Adhesive strip feeding assembly; 421. Adhesive strip guide wheel; 422. Main drive wheel; 423. Main drive clamping assembly; 424. First drive mechanism; 425. Tilting detection assembly; 43. Corner buffer assembly Components; 431. Upper cover plate; 432. Lower cover plate; 433. First roller group; 434. Second roller group; 435. Buffer channel; 436. Distance sensor; 44. Adhesive strip bonding assembly; 441. Main feed roller; 442. Feed roller clamping assembly; 443. Release paper peeling assembly; 4431. Release paper sensor; 444. Adhesive strip cutting assembly; 445. Cutter limit assembly; 446. Bonding assembly; 4461. Adhesive strip end position detection assembly; 4462. Adhesive strip start position detection assembly; 4463. Roller head; 4464. Clearance groove; 45. Mounting frame; 46. Constant force floating assembly; 47. Valve island assembly; 5. Frame; 6. Sealing strip; 7. Control box. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0030] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0031] like Figures 1 to 13 As shown, a preferred embodiment of an automatic door sealing strip bonding system is illustrated, which includes: a sealing strip unwinding mechanism 1, a sealing strip buffer mechanism 2, a robot 3, and a sealing strip bonding mechanism 4.

[0032] The sealing strip buffer mechanism 2 is installed on a frame 5; the sealing strip unwinding mechanism 1 is set at the feeding end of the sealing strip buffer mechanism 2, and the robot 3 is set at the discharging end of the sealing strip buffer mechanism 2; the sealing strip bonding mechanism 4 is installed at the operating end of the robot 3.

[0033] In actual use, the sealing strip is transported to the sealing strip unwinding mechanism 1 by a logistics forklift, then the sealing strip 6 enters the sealing strip buffer mechanism 2, and finally enters the sealing strip bonding mechanism 4. The robot 3, along with the sealing strip bonding mechanism 4, bonds the sealing strip 6 to the car door.

[0034] In addition to the above, the present invention also has the following embodiments: Furthermore, an automatic door sealing strip bonding system includes a sealing strip unwinding mechanism 1 comprising: a motor-driven rotary feed assembly 11, a cylinder-driven clamping assembly 12, and a frame positioning roller conveyor 13. Two frame positioning roller conveyors 13 are arranged in parallel, with the motor-driven rotary feed assembly 11 and the cylinder-driven clamping assembly 12 respectively positioned on opposite sides of the two frame positioning roller conveyors 13. Specifically, a forklift is used to place the sealing strip roller, along with the forklift frame, onto the frame positioning roller conveyor 13. After the sealing strip roller is positioned, the cylinder-driven clamping assembly 12 activates to fix the sealing strip roller onto the output shaft of the motor-driven rotary feed assembly 11, enabling the motor-driven rotary feed assembly 11 to drive the sealing strip roller to rotate, thereby unwinding the sealing strip. During production, based on the length of the buffer rubber strip set in the sealing strip buffer wheel assembly 22, the sealing strip in the sealing strip roller is fed into the sealing strip buffer wheel assembly 22 in real time. The sealing strip unwinding mechanism 1 is equipped with a rubber strip detection sensor, which sends an alarm message to the upper control system when the rubber strip on the sealing strip roller is exhausted, reminding the factory logistics department to replace the sealing strip roller in a timely manner.

[0035] Therefore, the process of changing the sealing strip roller in this device is as follows: Step 1: The sealing strip detection sensor detects that the length of the sealing strip 6 on the sealing strip roll is insufficient and uploads an alarm message to the control box 7.

[0036] Step 2: The motor brake of the motor rotation feed assembly 11 is stopped, and the cylinder pressing assembly 12 releases the sealing strip roller.

[0037] Step 3: Unwind the clamping sealing strip 5 on the feed oscillating roller assembly 21. The robot 3 and bonding assembly 446 on the production line continue to produce, consuming the sealing strip 6 that is stored in the heat-insulating buffer in the sealing strip buffer roller assembly 22.

[0038] Step 4: The material changer cuts the sealing strip 6 at point 21 of the unwinding feed oscillating wheel assembly.

[0039] Step 5: The workshop logistics forklift will fork out the sealing strip roll along with the material frame and feed in a new sealing strip roll.

[0040] Step 6: The new sealing strip roll frame is initially positioned on the frame positioning roller conveyor 13 by gravity.

[0041] Step 7: The cylinder clamping assembly 12 clamps the sealing strip roll to ensure that the sealing strip roll is coaxial with the motor rotation feed assembly 11.

[0042] Step 8: The replacement worker connects the old and new sealing strips 6 using a heat fusion method.

[0043] Step 9: The material changer clears the alarm of the main control system of the control box 7, loosens the sealing strip on the unwinding feed swing wheel group 21, and allows the sealing strip buffer wheel group 22 to continue buffering the sealing strip 6 according to the set program.

[0044] Step 10: Production line workers continuously observe the connection point of sealing strip 6 as it passes the sealing strip buffer wheel group 22 and reaches the position of the adhesive strip cutting component 444. They confirm whether the release paper has peeled off normally and whether the flip detection component 425 on the bonding equipment alarms. If there is a problem, manual intervention is required. The new sealing strip roll works normally.

[0045] Furthermore, an automatic bonding system for car door sealing strips includes a sealing strip buffer mechanism 2 comprising: an unwinding and feeding oscillating wheel assembly 21, a sealing strip buffer wheel assembly 22, a heating mechanism 23, and a robot trajectory buffer wheel assembly 24. The unwinding and feeding oscillating wheel assembly 21 is rotatably mounted on a frame 5, the sealing strip buffer wheel assembly 22 is mounted on a frame 5, the heating mechanism 23 is mounted on a frame 5 and is located close to the sealing strip buffer wheel assembly 22, and the robot trajectory buffer wheel assembly 24 is slidably mounted on a frame 5. The unwinding and feeding oscillating wheel assembly 21 is located close to the sealing strip unwinding mechanism 1, and the robot trajectory buffer wheel assembly 24 is located close to the robot 3. Specifically, the unwinding feeding oscillating wheel assembly 21 is located above the sealing strip roller. During the feeding process of the sealing strip roller, the wrapping point of the strip moves back and forth. Because the unwinding feeding oscillating wheel assembly 21 can oscillate relative to the frame 5, it ensures that the sealing strip enters the sealing strip buffer wheel assembly 22 with a constant posture. The sealing strip buffer wheel assembly 22 buffers 10-30m of sealing strip 6 according to the production situation, ensuring continuous production on the production line during the replacement of the sealing strip roller. At the same time, a heating mechanism 23 is set at the sealing strip buffer wheel assembly 22 to ensure that the sealing strip 6 is kept at a constant temperature during the production process, ensuring the tensile elasticity and adhesiveness of the sealing strip 6. The robot trajectory buffer wheel assembly 24 can slide up and down quickly through the sliding frame 242, ensuring that the sealing strip 6 is not pulled or damaged by the rapidly moving robot 3 during the process of the robot 3 holding the sealing strip bonding mechanism 4 and wrapping it around the door.

[0046] Furthermore, an automatic bonding system for car door sealing strips includes an unwinding and feeding oscillating wheel assembly 21 comprising: a mounting frame 211, oscillating wheels 212, and limiting rings 213. The mounting frame 211 is rotatably mounted on the frame 5. Several limiting rings 213 are mounted on the side of the mounting frame 211 near the sealing strip unwinding mechanism 1. Several oscillating wheels 212 are mounted on the upper end of the mounting frame 211, with a corresponding limiting ring 213 between each pair of adjacent oscillating wheels 212. Specifically, the mounting frame 211 can be rotatably mounted on the frame 5 via a rotating shaft, etc. When the sealing strip 6 enters the unwinding and feeding oscillating wheel assembly 21, it is first limited by several limiting rings 213, then its direction is changed and it is conveyed by several oscillating wheels 212, and finally it is conveyed to the sealing strip buffer wheel assembly 22.

[0047] Furthermore, in an automatic door sealing strip bonding system, a slide rail 241 is longitudinally mounted on the side of the frame 5 near the robot 3, and the robot trajectory buffer wheel set 24 is rotatably mounted on a sliding frame 242, which is longitudinally slidably mounted on the slide rail 241.

[0048] Furthermore, an automatic door sealing strip bonding system is provided, wherein the sealing strip bonding mechanism 4 includes: a strip unloading roller assembly 41, a strip feeding assembly 42, a corner buffer assembly 43, and a strip bonding assembly 44; the strip unloading roller assembly 41 is mounted on the operating end of the robot 3 via a mounting shaft, the strip feeding assembly 42 and the strip bonding assembly 44 are mounted on a mounting frame 45, the mounting frame 45 is mounted on the operating end of the robot 3 via a constant force floating assembly 46, and the corner buffer assembly 43 is mounted on the mounting frame 45 via a valve island assembly 47, wherein the inlet end of the corner buffer assembly 43 faces the strip feeding assembly 42, and the outlet end of the corner buffer assembly 43 faces the strip bonding assembly 44. Specifically, the sealing strip 6 is fed into the sealing strip feeding assembly 42 via the adhesive strip unloading roller assembly 41. The adhesive strip feeding assembly 42 drives the sealing strip 6 further into the corner buffer assembly 43, which changes the conveying direction of the sealing strip 6. Finally, the sealing strip is bonded to the door position via the adhesive strip bonding assembly 44. The adhesive strip bonding assembly 44 and the adhesive strip feeding assembly 42 are fixed to the operating end of the robot 3 via the constant force floating assembly 46. During the door bonding process, due to the dimensional errors of the door edge and the bonding trajectory errors, the constant force floating assembly 46 needs to ensure that the rolling head 4463 floats with the operating end of the robot 3 and remains in a close and tight state during the three-dimensional spatial trajectory movement of the robot 3. The output force of the constant force floating component 46 is equal to the sum of the adhesive force, the gravity component of the floating component, and the inertial force of the floating component. The output force of the floating component is controlled to a constant value by an electric proportional valve. The adhesive force fluctuates within a certain range due to the change in the inertial force of the floating component 46. The adhesive force is monitored in real time by a tension and compression sensor to achieve an adhesive force of 20-50N for the sealing strip.

[0049] An automatic door sealing strip bonding system includes a strip feeding assembly 42 comprising: a strip guide wheel 421, a main drive wheel 422, a main drive clamping assembly 423, a first drive mechanism 424, and a flip detection assembly 425. The strip guide wheel 421 is laterally mounted on one end of the mounting frame 45 near the strip unloading roller assembly 41 along its diameter. The main drive wheel 422 is longitudinally mounted on the outer wall of the mounting frame 45 along its diameter. The main drive clamping assembly 423 is mounted on the outer wall of the mounting frame 45 and is positioned opposite to the outer wall of the main drive wheel 422. The first drive mechanism 424 is mounted on the inner wall of the mounting frame 45, and the output shaft of the first drive mechanism 424 is mounted on the main drive wheel 422. The flip detection assembly 425 is mounted on the mounting frame 45 and is located on the side of the main drive wheel 422 away from the strip guide wheel 421. Specifically, after the sealing strip is fed into the sealing strip feeding assembly 42 by the sealing strip unloading roller assembly 41, the direction of the sealing strip is changed by the sealing strip guide wheel 421, and the sealing strip 6 is conveyed in a fixed posture. After being pressed by the main drive pressing assembly 423, the sealing strip 6 is fed by the friction of the main drive wheel 422. A flip detection assembly 425 is installed at the outlet of the main drive wheel 422 to detect whether the sealing strip 6 is twisted or flipped. Finally, it enters the corner buffer assembly 43 through the guide assembly.

[0050] In a preferred embodiment, the main drive clamping assembly 423 in this device may include a drive cylinder and several clamping rollers. The clamping rollers are slidably mounted on the mounting frame 45. The drive cylinder controls the clamping rollers to move closer to or away from the sealing strip, thereby clamping the sealing strip 6. Other structures may also be provided to clamp the sealing strip 6.

[0051] Furthermore, an automatic door sealing strip bonding system includes a strip bonding assembly 44 comprising: a main feed wheel 441, a second drive mechanism, a feed wheel clamping assembly 442, a release paper peeling assembly 443, a strip cutting assembly 444, a cutter limiting assembly 445, and a bonding assembly 446. The main feed wheel 441 and the feed wheel clamping assembly 442 are mounted on the outer side wall of the mounting frame 45, and are arranged opposite to each other. The second drive mechanism is mounted on the mounting frame 45. The inner wall of the frame 45, and the output shaft of the second drive mechanism are mounted on the main feed wheel 441. The release paper peeling assembly 443, the adhesive strip cutting assembly 444, and the cutter limiting assembly 445 are all mounted on the outer wall of the mounting frame 45. The release paper peeling assembly 443 is located between the main feed wheel 441 and the cutter limiting assembly 445. The adhesive strip cutting assembly 444 matches the cutter limiting assembly 445. The bonding assembly 446 is mounted on the side of the mounting frame 45 away from the corner buffer assembly 43. Specifically, the adhesive strip 6 enters the adhesive strip bonding assembly 44 through the corner buffer assembly 43. First, it is continued to be fed by the main feed wheel 441. Then, before entering the adhesive strip cutting assembly 444, the release paper of the sealing strip is peeled and recycled by the release paper peeling assembly 443. The sealing strip is cut by the adhesive strip cutting assembly 444. Finally, the sealing strip 6 is bonded to the door by the bonding assembly 446.

[0052] In a preferred embodiment, the release liner peeling assembly 443 in this device can be driven by roller friction for peeling and can be connected to a release liner collecting assembly. The sealing strip 6 and the release liner enter the guide seat together, and are separated by the mechanical action of the peeling plate or peeling pin. The power roller and the clamping roller clamp the peeled release liner, and rely on friction to continuously pull it and feed it into the release liner collecting assembly. Alternatively, other existing devices capable of peeling the release liner from the sealing strip can be used. This device has a release liner sensor 4431 installed on the mounting frame 45, facing the release liner peeling assembly 443. The release liner sensor 4431 monitors the peeling status of the release liner in real time and transmits the signal to the control box 7.

[0053] In a preferred embodiment, a limiting ring capable of limiting the sealing strip 6 is also provided between the corner buffer assembly 43 and the main feed wheel 441, and a plurality of limiting rings capable of limiting the sealing strip are also provided between the adhesive strip cutting assembly 444 and the adhesive assembly 446.

[0054] Furthermore, a cutting groove is provided on the cutting blade limiting assembly 445. When the adhesive strip cutting assembly 444 cuts the sealing strip 6, the cutting blade of the adhesive strip cutting assembly 444 can engage with the cutting groove, ensuring a cutting accuracy of 0.5±0.5mm. This ensures that the adhesive strip cutting assembly 444 can cut the sealing strip 6 without damaging other devices. The cutting blade limiting assembly 445 is made of Teflon material to prevent adhesion to the sealing strip 6. A quick-replaceable limiting block is provided on the cutting blade limiting assembly 445. The limiting block is fixed by a spring pin, and the cutting groove is set on the limiting block, allowing for quick replacement.

[0055] Furthermore, an automatic door sealing strip bonding system includes a bonding component 446 comprising a roller head 4463 rotatably mounted on a mounting frame 45. The outer circumferential surface of the roller head 4463 has a toothed structure, and the outer side wall of the roller head 4463 is recessed inward to form an annular clearance groove 4464. Specifically, the sealing strip 6 can be deformed by being squeezed by the limiting ring between the adhesive strip cutting component 444 and the bonding component 446 and then enter the roller head 4463. The roller head 4463 is designed with a roller disc structure with a clearance groove 4464 on one side, which can squeeze the excess sealing strip 6 into the clearance groove 4464. The outer circumferential surface of the roller head 4463 is a roller surface with a toothed structure, which thoroughly applies pressure to the bonding area, making the bonding pressure more effectively applied to the bonding area and resulting in higher bonding strength. Furthermore, the rolling head 4463 controls the feeding of the sealing strip 6 through the transmission mechanism driven by the rolling motor. The transmission mechanism includes, but is not limited to, gear transmission, chain transmission, and belt transmission. The feeding speed is synchronized with the tangential speed of the door at the rolling point, thereby ensuring that the relative movement between the rolling head 4463 and the door is pure rolling. The constant force floating component 46 adjusts and controls the bonding rolling pressure to ensure uniform bonding pressure and improve the bonding quality.

[0056] In a preferred embodiment, a retractable adhesive strip end position detection component 4461 and a rotatable adhesive strip initial position detection component 4462 are also installed on the mounting frame 45. The adhesive strip initial position detection component 4462 is located below the bonding component 446 and consists of a rotary drive element, a sensor bracket, and a detection sensor. The rotary drive element is mounted on the mounting frame 45, and the detection sensor is connected to the rotary drive element via the sensor bracket. The detection sensor rotates to the outlet position of the bonding component 446 for detection. When the sensor detects material at the outlet, the conveying of the sealing strip 6 stops, and the rotary drive element drives the detection sensor to rotate downwards by 180 degrees to avoid the door bonding trajectory. The rotary drive element can be, but is not limited to, a cylinder, an electric cylinder, or other rotary motion drive element. The function of the adhesive strip end position detection component 4461 is to determine when to cut the sealing strip, ensuring a joint alignment accuracy of 0.5±0.5mm. The detection component sensor extends through a telescopic drive element, and the detection point is located at the starting point of the door bonding trajectory. During the bonding process, when the sensor detects the bonding starting point of the sealing strip 6 on the door, the adhesive strip cutting component 444 cuts the sealing strip 6. After the detection is completed, it retracts to the interference avoidance position.

[0057] Furthermore, an automatic door sealing strip bonding system is provided, wherein the corner buffer assembly 43 includes: an upper cover plate 431, a lower cover plate 432, a first roller group 433, and a second roller group 434; the upper cover plate 431 and the lower cover plate 432 are both installed on the valve island assembly 47, the upper cover plate 431 and the lower cover plate 432 are connected by the first roller group 433 and the second roller group 434, and a buffer channel 435 is formed between the first roller group 433 and the second roller group 434. Specifically, the corner buffer assembly 43 is located between the main drive wheel 422 and the main feed wheel 441. Its function is to prevent the sealing strip from being stretched or compressed due to the inconsistency between the feeding speed and the discharge speed. A sealing strip buffer channel 435 is formed between the upper cover plate 431 and the lower cover plate 432. The first roller group 433 and the second roller group 434 are both arc-shaped and arranged between the upper cover plate 431 and the lower cover plate 432, and the arc of the arc faces away from the outside of the corner buffer assembly 43, effectively limiting the sealing strip 6 from forming a downward-opening parabolic shape. A buffer channel 435 is provided inside the buffer channel 435. A distance sensor 436 is used to measure the distance between the detection end and the sealing strip 6. The program controls the linear speed of the main drive wheel 422 and the linear speed of the main feed wheel 441. During the process of the sealing strip 6 being transported from the cutting position of the adhesive strip cutting assembly 444 to the rolling position of the bonding assembly 446, or when the ratio of the linear speed of the rolling wheel of the rolling unit approaches 1, the measured value is guaranteed to fluctuate within the set range. When the measured value is higher than the upper limit of the set range, the control ratio decreases, and when the measured value is lower than the lower limit of the set range, the control ratio increases, so that the sealing strip 6 is always in the transmission between the upper and lower boundaries.

[0058] In summary, the specific bonding process of this device for car doors is as follows: Step 1: See details Figure 2 and Figure 3 As shown, the sealing strip roller is placed on the sealing strip unwinding mechanism 1 by a forklift. The sealing strip unwinding mechanism 1 positions the sealing strip roller, and the sealing strip 6 enters the sealing strip buffer mechanism 2.

[0059] Step Two: See details Figure 5 and Figure 6 As shown, the sealing strip 6 enters the position of the main drive wheel 422 through the rubber strip unloading roller assembly 41.

[0060] Step 3: See details Figure 6 As shown, after the main drive wheel clamping assembly 423 clamps the sealing strip 6, it is driven by the first drive mechanism 424 to feed.

[0061] Step 4: See details Figure 7 As shown, the sealing strip controls the speed ratio of the main drive and the main feed in real time through the corner buffer assembly 43.

[0062] Step 5: See details Figure 8 As shown, the initial position detection component 4462 of the adhesive strip rotates and rises to the monitoring point.

[0063] Step Six: See also Figure 8 As shown, the sealing strip 6 has its release paper removed by the release paper peeling assembly 443, and the peeled release paper is vacuumed into the waste bin by the release paper collection assembly.

[0064] Step 7: The sealing strip 6 moves from the cutting position of the strip cutting assembly 444 to the position of the strip starting position detection assembly 4462.

[0065] Step 8: See details Figure 9 As shown, the adhesive strip starting position detection component 4462 rotates and descends to the interference avoidance position.

[0066] Step Nine: See details Figure 10 As shown, after the sealing strip 6 reaches the initial position, the robot 3 drives the adhesive component 446 to move to the starting point of the door adhesive.

[0067] Step 10: Robot 3 drives the bonding component 446 to bond the sealing strip 6 around the car door at a constant speed and with a constant bonding force.

[0068] Step 11: After rotating the adhesive strip around the car door for one full turn, when it approaches the starting point of the adhesive application, the adhesive strip end position detection component 4461 extends.

[0069] Step 12: The sealing strip end position detection component 4461 detects the starting point of the sealing strip that has been adhered to the door.

[0070] Step 13: The adhesive strip cutting assembly 444 extends to cut the sealing strip 6.

[0071] Step Fourteen: Continue the trajectory of the adhesive component 446 and continue to adhesive the remaining cut sealing strip 6 onto the car door, aligning the seam with the starting end.

[0072] Step 15: Robot 3 exits the door roller conveyor line and rotates the bonding equipment in the opposite direction for one revolution, buffering the sealing strip 6 back into the adhesive strip unloading roller assembly 41.

[0073] Step 16: Repeat steps 1-15 to complete the bonding of the next car door.

[0074] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic bonding system for car door sealing strips, characterized in that, include: Sealing strip unwinding mechanism, sealing strip buffer mechanism, robot, sealing strip bonding mechanism; The sealing strip buffer mechanism is mounted on a frame; The sealing strip unwinding mechanism is located at the feeding end of the sealing strip buffer mechanism, and the robot is located at the discharging end of the sealing strip buffer mechanism; The sealing strip bonding mechanism is installed on the operating end of the robot.

2. The automatic bonding system for car door sealing strips according to claim 1, characterized in that, The sealing strip unwinding mechanism includes: a motor rotation feeding assembly, a cylinder clamping assembly, and a frame positioning roller conveyor; the two frame positioning roller conveyors are arranged in parallel, and the motor rotation feeding assembly and the cylinder clamping assembly are respectively located on the opposite sides of the two frame positioning roller conveyors.

3. The automatic bonding system for car door sealing strips according to claim 1, characterized in that, The sealing strip buffer mechanism includes: an unwinding and feeding oscillating wheel assembly, a sealing strip buffer wheel assembly, a heating mechanism, and a robot trajectory buffer wheel assembly; the unwinding and feeding oscillating wheel assembly is rotatably mounted on the frame, the sealing strip buffer wheel assembly is mounted on the frame, the heating mechanism is mounted on the frame and is close to the sealing strip buffer wheel assembly, and the robot trajectory buffer wheel assembly is slidably mounted on the frame, wherein the unwinding and feeding oscillating wheel assembly is located close to the sealing strip unwinding mechanism, and the robot trajectory buffer wheel assembly is located close to the robot.

4. The automatic bonding system for car door sealing strips according to claim 3, characterized in that, The unwinding and feeding oscillating wheel assembly includes: a mounting frame, oscillating wheels, and limiting rings; the mounting frame is rotatably mounted on the frame, a plurality of limiting rings are mounted on the side of the mounting frame near the sealing strip unwinding mechanism, a plurality of oscillating wheels are mounted on the upper end of the mounting frame, and a limiting ring is provided between each pair of adjacent oscillating wheels.

5. The automatic bonding system for car door sealing strips according to claim 3, characterized in that, A slide rail is longitudinally mounted on the side of the frame closest to the robot. The robot trajectory buffer wheel assembly is rotatably mounted on a sliding frame, which is slidably mounted on the slide rail.

6. The automatic bonding system for car door sealing strips according to claim 1, characterized in that, The sealing strip bonding mechanism includes: a strip unloading roller assembly, a strip feeding assembly, a corner buffer assembly, and a strip bonding assembly; the strip unloading roller assembly is mounted on the operating end of the robot via a mounting shaft; the strip feeding assembly and the strip bonding assembly are mounted on a mounting frame; the mounting frame is mounted on the operating end of the robot via a constant force floating assembly; the corner buffer assembly is mounted on the mounting frame via a valve island assembly; wherein the inlet end of the corner buffer assembly faces the strip feeding assembly, and the outlet end of the corner buffer assembly faces the strip bonding assembly.

7. The automatic bonding system for car door sealing strips according to claim 6, characterized in that, The adhesive strip feeding assembly includes: an adhesive strip guide wheel, a main drive wheel, a main drive clamping assembly, a first drive mechanism, and a flip detection assembly; the adhesive strip guide wheel is horizontally mounted on one end of the mounting frame near the adhesive strip unloading roller assembly along its diameter direction; the main drive wheel is longitudinally mounted on the outer wall of the mounting frame along its diameter direction; the main drive clamping assembly is mounted on the outer wall of the mounting frame and is disposed opposite to the outer wall of the main drive wheel; the first drive mechanism is mounted on the inner wall of the mounting frame, and the output shaft of the first drive mechanism is mounted on the main drive wheel; the flip detection assembly is mounted on the mounting frame and is located on the side of the main drive wheel away from the adhesive strip guide wheel.

8. The automatic bonding system for car door sealing strips according to claim 6, characterized in that, The adhesive strip bonding assembly includes: a main feed wheel, a second drive mechanism, a feed wheel clamping assembly, a release liner peeling assembly, an adhesive strip cutting assembly, a cutter limiting assembly, and a bonding assembly. The main feed wheel and the feed wheel clamping assembly are mounted on the outer side wall of the mounting frame, and the main feed wheel and the feed wheel clamping assembly are arranged opposite to each other. The second drive mechanism is mounted on the inner side wall of the mounting frame, and the output shaft of the second drive mechanism is mounted on the main feed wheel. The release liner peeling assembly, the adhesive strip cutting assembly, and the cutter limiting assembly are all mounted on the outer side wall of the mounting frame. The release liner peeling assembly is located between the main feed wheel and the cutter limiting assembly. The adhesive strip cutting assembly matches the cutter limiting assembly. The bonding assembly is mounted on the side of the mounting frame away from the corner buffer assembly.

9. The automatic bonding system for car door sealing strips according to claim 8, characterized in that, The bonding assembly includes a roller head, which is rotatably mounted on the mounting frame. The outer circumferential surface of the roller head has a toothed structure, and the outer side wall of the roller head is recessed inward to provide an annular clearance groove.

10. The automatic bonding system for car door sealing strips according to claim 6, characterized in that, The corner buffer assembly includes: an upper cover plate, a lower cover plate, a first roller group, and a second roller group; the upper cover plate and the lower cover plate are both installed on the valve island assembly, the upper cover plate and the lower cover plate are connected through the first roller group and the second roller group, and a buffer channel is formed between the first roller group and the second roller group.

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