Automobile rear roof sharp corner fabric welding device

Abstract

This utility model provides a welding device for the sharp corner fabric of a car rear roof, including a frame. A positioning mold for placing and positioning the rear roof is mounted on the base of the frame. A first pressing component for pressing the fabric onto the upper surface of the rear roof is located on the outer periphery of the positioning mold on the base. A lifting plate and a lifting drive cylinder for driving the lifting plate up and down are connected to the top plate of the frame. A second pressing component for pressing the fabric at the sharp corner of the rear roof and an ultrasonic welding component for welding the fabric at the sharp corner are connected to the lower end of the lifting plate. A trimming component for straightening and flattening the fabric to be welded is also connected to the base at a position corresponding to the sharp corner of the rear roof. This utility model discloses a welding device for the sharp corner fabric of a car rear roof, which achieves automatic positioning of the car roof and straightening and trimming of the fabric at the welding point. Automatic welding is performed using an ultrasonic welding component, effectively improving work efficiency and producing a smooth and aesthetically pleasing weld surface.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive roof processing equipment, and more specifically, to a welding device for the sharp corner fabric of an automotive rear roof. Background Technology

[0002] With economic development, most households now own cars. As the car market continues to expand and people's understanding of cars changes, competition in the automotive industry has become increasingly fierce, especially in terms of the diversification of interior options.

[0003] As an interior component, the manufacturing process of the rear headliner is particularly important. After the injection-molded semi-finished rear headliner is completed, an interior fabric layer needs to be laminated to its lower surface, and the outer edges of the main body of the rear headliner need to be bound. Because one end of the rear headliner has a sharp corner, the fabric at the corner tends to overlap after binding, making it impossible to achieve a completely flat surface. Therefore, special treatment is needed for the overlapped fabric. Currently, a common method is to use ultrasonic welding to weld and fix the overlapped fabric, improving the flatness of the fabric layer at the sharp corner of the rear headliner.

[0004] In existing technologies, there is no dedicated positioning fixture, requiring manual positioning of the car's rear roof before welding the fabric at the sharp corners using a handheld welding gun. This entirely manual positioning method is not only time-consuming, labor-intensive, and inefficient, but also lacks accuracy, resulting in inconsistent positioning each time and poor uniformity of the welded car roof fabric. Utility Model Content

[0005] To overcome at least one of the defects in the prior art, this utility model provides a welding device for the pointed corner fabric of a car rear roof, which realizes automatic positioning of the car roof and straightening and trimming of the fabric at the welding point, and automatically welds it through an ultrasonic welding component, effectively improving work efficiency and ensuring that the welding point is consistent each time, and the fabric is flatter and more beautiful after welding.

[0006] The present invention provides a welding device for the fabric at the sharp corner of a car rear roof: It includes a frame, a positioning mold for placing and positioning the rear roof on the base of the frame, and a first pressing component for pressing against the upper surface of the rear roof on the outer periphery of the positioning mold on the base; a lifting plate and a lifting drive cylinder for driving the lifting plate up and down are connected to the top plate of the frame; a second pressing component for pressing the fabric at the sharp corner of the rear roof and an ultrasonic welding component for welding the fabric at the sharp corner of the rear roof are connected to the lower end of the lifting plate; a trimming component for straightening and flattening the fabric to be welded is also connected to the base at a position corresponding to the sharp corner of the rear roof.

[0007] Compared with the prior art, the welding device for the pointed corner fabric of the automobile rear roof of this utility model has the following advantages: This utility model relates to a specialized tooling device for welding the pointed corner fabric of a car rear roof. It achieves initial positioning of the car roof by setting positioning components on the worktable of the frame. The pressing and clamping components flatten and press the fabric to be welded at multiple locations on the car roof, ensuring the flatness of the fabric at each welding point. Next, the second pressing components press and limit the fabric at the upper end of the car roof, achieving secondary positioning and further ensuring the stability of the car roof's position. Finally, the ultrasonic welding components on the lifting plate perform ultrasonic welding on the corresponding positions of the fabric on the car roof, making the fabric at those positions tighter and more aesthetically pleasing. The entire welding process requires no manual intervention, and the fabric at the welding points can be automatically pressed, improving work efficiency and ensuring the flatness and aesthetics of the welded surface.

[0008] Furthermore, the first pressing assembly includes a plurality of flipping drive cylinders disposed on the outer periphery of the positioning mold core, and each flipping drive cylinder has a flipping pressing block connected to its flipping arm for pressing against the upper end face of the rear roof.

[0009] Furthermore, the second pressing assembly includes a mounting base connected to the lower end face of the lifting plate, and a horizontally arranged first slide cylinder is connected to the lower end of the mounting base. A horizontal pressing block is connected to the first slide plate of the first slide cylinder.

[0010] Furthermore, the ultrasonic welding assembly includes an ultrasonic generator, a transducer, and a welding head. The ultrasonic generator is fixed to the lifting plate, and a fixing rod is connected to the lower end of the lifting plate. A second slide cylinder is rotatably connected to the lower end of the fixing rod. The transducer is fixed to the second slide plate of the second slide cylinder, and the welding head is connected to one end of the transducer.

[0011] As an improvement, the second slide plate is also connected to two air blowing pipes located on both sides of the welding head, with the outlet ends of the two air blowing pipes facing the free end of the welding head.

[0012] Furthermore, the trimming assembly includes a mounting frame and a translation drive cylinder for driving the mounting frame to move horizontally. The mounting frame is connected to a scraper plate for flattening the fabric to be welded and a scraper drive cylinder for driving the scraper plate to move. Pneumatic fingers are connected to the scraper plate. When the two grippers of the pneumatic fingers are used to clamp the fabric to be welded, the translation drive cylinder is used to drive the mounting frame to move horizontally so that the fabric is in a taut state. The scraper drive cylinder is used to drive the scraper plate to move from top to bottom along the fabric. The free end of the scraper plate is provided with a clearance through hole for the welding head to pass through.

[0013] Furthermore, the mounting bracket is also connected to two pressure plates for pressing the fabric on the two side walls forming sharp angles on the rear roof, and a pressure drive cylinder for driving the two pressure plates to move.

[0014] In a further improvement, the upper end of the lifting plate is connected to at least two guide rails and / or guide rods, the top plate has at least two connecting holes, and guide sliders and / or guide sleeves are connected to the positions corresponding to each connecting hole on the top plate. The upper ends of each guide rail and / or guide rod are slidably connected to the corresponding guide slider and / or guide sleeve.

[0015] The aforementioned improvements and advantages of this invention will be set forth in detail in the following specific embodiments, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures particularly pointed out in the description and drawings. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the welding device for the sharp corner fabric of the rear roof of an automobile according to this utility model. Figure 2 for Figure 1 Simplified structural diagram of the welding device for the sharp corner fabric of the rear roof of a Chinese automobile; Figure 3 This is a partial schematic diagram of the connection structure of the first pressing component, the second pressing component, and the ultrasonic welding component in this utility model. Figure 4 for Figure 3 Another perspective view of the local structure; Figure 5 This is a partial structural diagram of the trimming component and the positioning mold core in this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Base; 2. Positioning mold core; 3. Top plate; 4. Lifting plate; 5. Lifting drive cylinder; 6. Tilting drive cylinder; 7. Tilting pressure block; 8. Mounting base; 9. First slide cylinder; 10. Horizontal pressure block; 11. Ultrasonic generator; 12. Transducer; 13. Welding head; 14. Fixing rod; 15. Second slide cylinder; 16. Air blowing pipe; 17. Mounting bracket; 18. Translation drive cylinder; 19. Shovel plate; 20. Shovel drive cylinder; 21. Pneumatic finger; 22. Clearance through hole; 23. Horizontal pressure plate; 24. Vertical pressure plate; 25. Pressure drive cylinder; 26. Guide slide rail; 27. Guide rod; 28. Air tank; 29. ​​Clamping plate. Detailed Implementation

[0018] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0019] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "fixed" and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0020] In the description of the embodiments of this application, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0021] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] See Figures 1-5As shown in the figure, this application discloses a welding device for the sharp corner fabric of a car rear roof, including a frame. The frame includes a rectangular base 1, with supporting columns at the four corners of the base 1. A top plate 3 is connected to the top of the four supporting columns. A positioning mold 2 for placing and positioning the car rear roof is provided on the base 1. Specifically, a curved surface matching the shape of the rear roof is formed on the upper end face of the positioning mold 2 to ensure that the rear roof is more flat and stable after positioning. In addition, to further ensure the stability of the rear roof after positioning, a plurality of first pressing components are provided on the base 1 at the outer periphery of the positioning mold 2 for pressing and limiting the upper end face of the rear roof. In addition, a lifting plate 4 that can slide up and down and a lifting drive cylinder 5 for driving the lifting plate 4 to move up and down are connected to the top plate 3. In this embodiment, preferably, two vertically arranged hydraulic drive cylinders are connected to the upper end face of the top plate 3, and the piston rods of the two hydraulic drive cylinders are connected to the upper end face of the lifting plate 4. At the lower end of the lifting plate 4, there is a second pressing component for pressing the fabric to be welded at the sharp corner of the rear roof and an ultrasonic welding component for welding the fabric at the sharp corner of the rear roof; at the position corresponding to the sharp corner of the rear roof, there is also a trimming component for straightening and flattening the fabric to be welded. Before ultrasonic welding, the fabric is straightened and flattened by the trimming component to ensure that the outer surface fabric of the corresponding position of the rear roof is flat and beautiful after welding.

[0023] In this embodiment, in order to improve work efficiency, the positioning and welding of two rear canopies are realized simultaneously in one welding device; that is, two positioning molds 2 are set at intervals along the length of the base 1, and a corresponding first pressing component and trimming component are set on the outer periphery of each positioning mold. Similarly, a second pressing component and an ultrasonic welding component corresponding to the two positioning molds 2 are set on the lifting plate 4. Since the structures (stations) of the two pressing and welding parts are exactly the same, the following description will take the structure of one of the stations as an example.

[0024] In this embodiment, the first pressing assembly includes multiple flipping drive cylinders 6 disposed around the outer periphery of the positioning mold core 2. Each flipping drive cylinder 6 has a flipping pressing block 7 connected to its flipping arm for pressing against the upper surface of the rear roof. Preferably, there are four flipping drive cylinders 6, which are evenly divided into two groups. The two groups of flipping drive cylinders 6 are respectively disposed on both sides of the positioning mold core 2 in the width direction, and the two flipping drive cylinders 6 on the same side are spaced apart by a certain distance to ensure stable pressing of the rear roof.

[0025] The second pressing assembly includes a mounting base 8 connected to the lower end face of the lifting plate 4. A horizontally positioned first sliding cylinder 9 is connected to the lower end of the mounting base 8, and a horizontal pressing block 10 is connected to the first sliding plate of the first sliding cylinder 9. Specifically, there are two mounting bases 8 and two horizontal pressing blocks 10, corresponding to the two sharp corners of the rear ceiling. The horizontal pressing blocks 10 are mainly used to press the sharp corners of the rear ceiling. Since the protruding fabric at the welding position needs to be tightened before ultrasonic welding, improper tension control can cause bending deformation at the sharp corners of the rear ceiling. Therefore, the horizontal pressing blocks 10 are used to press the sharp corners of the rear ceiling to prevent deformation when tightening the fabric.

[0026] In this embodiment, the ultrasonic welding assembly includes an ultrasonic generator 11, a transducer 12, and a welding head 13. The ultrasonic generator 11 is fixed to the lifting plate 4. A fixing rod 14 is connected to the lower end of the lifting plate 4. A second sliding cylinder 15 is rotatably connected to the lower end of the fixing rod 14. The transducer 12 is fixed to the second sliding plate of the second sliding cylinder 15. The welding head 13 is connected to one end of the transducer 12. The ultrasonic generator 11 and the transducer 12 are electrically connected. More specifically, to accelerate cooling after welding, two air blowing pipes 16 are connected to the second sliding plate, located on both sides of the welding head 13. The outlet ends of both air blowing pipes 16 face the free end of the welding head 13. That is, after the welding head 13 completes the fabric welding, the two air blowing pipes 16 blow air towards the welding position to accelerate cooling and improve work efficiency.

[0027] On the other hand, see Appendix Figure 5 In this embodiment, the trimming assembly includes a mounting frame 17 and a translation drive cylinder 18 for driving the mounting frame 17 to move. A scraper plate 19 for flattening the material to be welded and a scraper drive cylinder 20 for driving the scraper plate 19 are connected to the mounting frame 17. A pneumatic finger 21 is connected to the scraper plate 19, and a clamping plate 29 is connected to each of the two grippers of the pneumatic finger 21. Anti-slip teeth are provided on the opposite sidewalls of the two clamping plates 29 to facilitate clamping. When the two clamping plates 29 of the pneumatic finger 21 are used to clamp the material to be welded... When welding fabric, the translation drive cylinder 18 is used to drive the mounting frame 17 to move horizontally so that the fabric is in a taut state. The scraper drive cylinder 20 is used to drive the scraper plate 19 to move from top to bottom along the fabric, so that the fabric to be welded is straightened and flattened. In addition, a clearance through hole 22 is provided at the free end of the scraper plate 19 for the welding head 13 to pass through. During welding, the welding head 13 passes through the clearance through hole 22 to perform welding. The advantage of doing this is that the fabric is always in a taut and flattened state during welding, ensuring the flatness and aesthetics of the fabric after welding.

[0028] Furthermore, the mounting bracket 17 is also connected to two pressure plates for pressing the fabric on the two side walls forming sharp angles on the rear roof, and pressure drive cylinders 25 for driving the movement of the two pressure plates respectively. Figure 5 The rear canopy's pointed corner is a right-angled structure. Once the rear canopy is positioned and stable, the pointed corner presents a horizontal and a vertical surface. The two pressure plates include a horizontal pressure plate 23 and a vertical pressure plate 24. The horizontal pressure plate 23 is used to press the fabric from top to bottom onto the horizontal surface, and the vertical pressure plate 24 is used to press the fabric from front to back onto the vertical surface. Both pressure plates are driven by corresponding drive cylinders to ensure the fabric at the pointed corner is fully positioned, further improving the flatness and aesthetics of the fabric after welding at the corresponding position of the rear canopy.

[0029] On the other hand, in order to improve the stability and straightness of the lifting plate 4 during its up-and-down movement, at least two guide rails 26 are connected to the upper end of the lifting plate 4, and guide sliders are connected to the top plate 3 at positions corresponding to each connecting hole. The upper end of each guide rail 26 is slidably connected to the corresponding guide slider. In this embodiment, guide rails 26 are connected to the four corners of the lifting plate 4, and four guide sliders are correspondingly provided on the top plate 3; and a guide rod 27 is also connected near each guide rail 26, and a guide sleeve is also provided on the fixed plate near each guide slider; that is, in this embodiment, the four guide rails 26 and four guide rods 27 are combined to limit the movement, thus fully ensuring the stability and straightness of the up-and-down movement of the lifting plate 4.

[0030] In some other embodiments, only the guide rail 26 structure or only the guide rod 27 structure can be provided to guide and limit the up and down movement of the lifting plate 4.

[0031] Working principle: The rear roof of the car is placed on the positioning mold 2 by a person or a robot. The first pressing component moves to achieve the initial positioning of the rear roof. Then, the lifting plate 4 moves down to close the mold, and the second pressing component moves to horizontally press the sharp corner of the rear roof. Then, the pneumatic finger 21 moves to clamp the protruding fabric at the position to be welded. The translation drive cylinder 18 moves, driving the entire mounting frame 17 to move the pneumatic finger 21 horizontally, so that the fabric is in a taut state. Then, the scraping drive cylinder 20 descends, driving the scraping plate 19 to move slowly downward against the fabric, so as to flatten the fabric. Until the scraping plate 19 moves to the set position, the welding head 13 moves to pass through the clearance through hole 22 to perform ultrasonic welding on the fabric at this position, so that the protruding fabric becomes flat. After the welding is completed, each drive component returns to the initial position to wait for the welding of the next rear roof.

[0032] In the above structure of this embodiment, the tilting drive cylinder 6, the translation drive cylinder 18, the shoveling drive cylinder 20, and the pressing drive cylinder 25 are all cylinders, and air tanks 28 connected to each cylinder are connected on the frame. This makes the entire welding device more flexible in application scenarios and eliminates the need for additional compressor configuration.

[0033] In the description of this application, the references to terms such as "this embodiment," "some embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A welding device for the sharp corner fabric of a car rear roof, characterized in that: The system includes a frame, on which a positioning mold (2) for placing and positioning the rear ceiling is provided on the base (1), and a first pressing assembly for pressing the upper surface of the rear ceiling is provided on the base (1) around the positioning mold (2); a lifting plate (4) and a lifting drive cylinder (5) for driving the lifting plate (4) to move up and down are connected to the top plate (3) of the frame; a second pressing assembly for pressing the fabric at the sharp corner of the rear ceiling and an ultrasonic welding assembly for welding the fabric at the sharp corner of the rear ceiling are connected to the lower end of the lifting plate (4); a trimming assembly for straightening and flattening the fabric to be welded is also connected to the position on the base (1) corresponding to the sharp corner of the rear ceiling.

2. The automotive headliner sharp corner fabric welding apparatus of claim 1, wherein: The first pressing assembly includes a plurality of flipping drive cylinders (6) disposed on the outer periphery of the positioning mold core (2), and each flipping drive cylinder (6) has a flipping block (7) connected to its flipping arm for pressing against the upper end face of the rear roof.

3. The automotive headliner sharp corner fabric welding apparatus according to claim 1 or 2, characterized by: The second pressing assembly includes a mounting base (8) connected to the lower end face of the lifting plate (4), and a horizontally arranged first slide cylinder (9) is connected to the lower end of the mounting base (8). A horizontal pressing block (10) is connected to the first slide plate of the first slide cylinder (9).

4. The welding device for the sharp corner fabric of the rear roof of an automobile according to claim 1, characterized in that: The ultrasonic welding assembly includes an ultrasonic generator (11), a transducer (12), and a welding head (13). The ultrasonic generator (11) is fixed on the lifting plate (4). The lower end of the lifting plate (4) is connected to a fixing rod (14). The lower end of the fixing rod (14) is rotatably connected to a second slide cylinder (15). The transducer (12) is fixed on the second slide plate of the second slide cylinder (15). The welding head (13) is connected to one end of the transducer (12).

5. The apparatus according to claim 4, wherein: The second slide plate is also connected to two air blowing pipes (16) located on both sides of the welding head (13), and the outlet ends of the two air blowing pipes (16) are facing the free end of the welding head (13).

6. The apparatus according to claim 4 or 5, wherein: The trimming assembly includes a mounting frame (17) and a translation drive cylinder (18) for driving the mounting frame (17) to translate. The mounting frame (17) is connected to a scraper plate (19) for scraping the fabric to be welded and a scraper drive cylinder (20) for driving the scraper plate (19) to move. The scraper plate (19) is connected to a pneumatic finger (21). When the two jaws of the pneumatic finger (21) are used to clamp the fabric to be welded, the translation drive cylinder (18) is used to drive the mounting frame (17) to move horizontally so that the fabric is in a taut state. The scraper drive cylinder (20) is used to drive the scraper plate (19) to move from top to bottom along the fabric. The free end of the scraper plate (19) is provided with a clearance through hole (22) for the welding head (13) to pass through.

7. The automotive headliner sharp corner fabric welding apparatus of claim 6, wherein: The mounting bracket (17) is also connected to two pressing plates for pressing the fabric on the two side walls forming sharp angles on the rear roof, and a pressing drive cylinder (25) for driving the two pressing plates to move.

8. The automotive headliner sharp corner fabric welding apparatus of claim 1, wherein: The upper end of the lifting plate (4) is connected to at least two guide rails (26) and / or guide rods (27). The top plate (3) has at least two connecting holes, and guide sliders and / or guide sleeves are connected to the positions corresponding to each connecting hole on the top plate (3). The upper ends of each guide rail (26) and / or guide rod (27) are slidably connected to the corresponding guide sliders and / or guide sleeves.

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