Sealing strip bending assembly

Abstract

The utility model discloses a sealing strip bending assembly and belongs to the technical field of sealing strip machining, the sealing strip bending assembly comprises a base plate, the base plate is provided with a first section, a second section and a third section which are connected in sequence and used for installing a sealing strip, the first section is an installation strip, a clamping strip is arranged on the top face of the installation strip, and the second section comprises a plurality of vertical guide pieces which are rotationally connected; the third section is of a long-strip-shaped block structure, one end of the third section is rotationally connected with the second section, the other end of the third section is connected with the tensioning assembly, a bent rail is formed in the base plate, and the tensioning assembly is located in the rail and moves along the rail. By optimizing the structural design, the problem that in the prior art, when an elastic piece is bent by a large angle, resilience is large is effectively solved, and meanwhile the bending precision and the forming quality of a product are improved.

Description

Technical Field

[0001] This application relates to the field of sealing strip processing technology, and in particular to a sealing strip bending assembly. Background Technology

[0002] Sealing strips play a vital role in the automotive industry, widely used in the joints of car doors, windows, sunroofs, and other areas. By installing sealing strips, gaps between body components are effectively filled, forming a physical barrier. Sealing strips effectively prevent rainwater, dust, and pollutants from entering the vehicle interior through these gaps, protecting electronic equipment and interior materials from damage and extending the vehicle's lifespan. By filling these gaps, sealing strips significantly reduce wind noise, tire noise, and external noise during driving, improving cabin quietness and optimizing ride comfort.

[0003] To meet the installation requirements of different vehicle models or locations, some sealing strips need to be pre-bent according to installation standards. Relevant prior art, such as the Chinese patent application "Bending Device for Automotive Sealing Strips," publication number CN111113863A, discloses a device including a base plate, a reference block and a first pressing block disposed opposite each other on the base plate. The surfaces of the reference block and the first pressing block opposite each other are standard curved surfaces. An elastic sheet is disposed between the reference block and the pressing block, with one end fixed to the base plate and the other end connected to a power device. The sealing strip is snapped onto the elastic sheet along its length. The power device drives the elastic sheet to bend and fully conform to the standard curved surface of the reference block. A second pressing block is also disposed above the reference block. The first and second pressing blocks are respectively connected to the power device. The power device drives the first pressing block to move horizontally and press against the elastic sheet conforming to the standard curved surface, and the power device drives the second pressing block to press vertically downward, acting on the elastic sheet and the standard curved surface.

[0004] In the aforementioned patent application, an elastic sheet is used as the carrier for installation and bending of the sealing strip. However, this solution still has certain limitations in practical applications. First, the elastic sheet itself has a certain elastic restoring force. When the sealing strip needs to be bent at a large angle, the restoring force of the elastic sheet will exert a reverse force on the sealing strip, causing the sealing strip to exhibit a large springback phenomenon after bending. This springback will affect the forming accuracy of the sealing strip and may even cause the sealing strip to fail to meet installation requirements. Second, the elastic sheets used in the prior art can usually only achieve small-angle bending or require a complex multi-segment bending structure. This not only increases the complexity of the equipment but may also cause wrinkles or deformation of the sealing strip during the bending process, affecting product quality.

[0005] Therefore, there is still room for improvement in the application scenarios of large-angle bending of sealing strips, and there is an urgent need for a sealing strip bending component that can effectively reduce springback and improve bending accuracy. Utility Model Content

[0006] The technical problem to be solved by this application is to provide a sealing strip bending assembly. By optimizing the structural design, it effectively solves the problem of large springback of the elastic sheet when bent at a large angle in the prior art, while improving the bending accuracy and the forming quality of the product.

[0007] The technical solution adopted in this application is as follows: a sealing strip bending assembly, including a base plate, on which a first section, a second section and a third section are arranged in sequence for mounting a sealing strip. The first section is an mounting strip, and a retaining strip is provided on the top surface of the mounting strip. The second section includes a plurality of vertical guide plates rotatably connected, and the sealing strip is snapped onto the retaining strip and the vertical guide plates. The third section is a long strip-shaped block structure, one end of the third section is rotatably connected to the second section, and the other end of the third section is connected to a tensioning assembly. The base plate has a curved track, and the tensioning assembly is located in the track and moves along the track.

[0008] Compared with existing technologies, the advantages of this application are that it uses multiple vertical guide plates with rotating connections to install the sealing strip. The connection between the vertical guide plates has good flexibility and very low elastic recovery force. This contrasts with the high elastic recovery force of the elastic plates in existing technologies, effectively avoiding the rebound phenomenon caused by elastic recovery force after the sealing strip is bent at a large angle, thereby improving bending accuracy. The rotating connection design of the vertical guide plates gives the sealing strip better flexibility and adaptability during bending, thus adapting to bending requirements of different shapes and angles.

[0009] This application features a curved track, and the tensioning component ensures that the first, second, and third sections remain taut throughout the movement. This design prevents the sealing strip from wrinkling or deforming during bending, thus guaranteeing product quality.

[0010] In summary, the synergistic effect of the rotating connection of the vertical guide plate and the tensioning component enables large-angle bending without being limited by the elastic restoring force of the elastic sheet. This gives the component a significant advantage in applications involving large-angle bending, overcoming the limitation of existing technologies where elastic sheets can only achieve small-angle bending.

[0011] In some embodiments of this application, the tensioning assembly includes a tensioning power cylinder, which is horizontally positioned within the track and aligned with the first, second, and third sections on the same straight line. The horizontal alignment of the tensioning power cylinder ensures that the sealing strip maintains a straight line during bending, preventing offset or deformation of the sealing strip due to the tilting of the power cylinder. Here, "the tensioning power cylinder is aligned with the first, second, and third sections on the same straight line" means that the sealing strip is also a straight strip structure in its non-working state and unprocessed state.

[0012] In some embodiments of this application, an auxiliary plate is provided below the substrate, the auxiliary plate is arranged parallel to the substrate, a guide groove is formed on the auxiliary plate, a connecting plate is installed below the auxiliary plate, one end of the connecting plate is connected to a rotating shaft movably mounted on the auxiliary plate, and the other end of the connecting plate is connected to a connecting rod. The rotating shaft is located at the center of the guide groove, and the connecting rod passes vertically through the guide groove and is connected to the tensioning power cylinder.

[0013] The auxiliary plate and the parallel-arranged base plate work together to provide additional support structure, enhancing the stability of the overall assembly. This application lowers the entire bending assembly, thereby improving its compactness and reducing the size of the equipment. The cooperation between the guide groove and the rotating shaft ensures that the design of the connecting plate and connecting rod of the tensioning power cylinder allows for smooth movement of the tensioning power cylinder, preventing it from wobbling within the track and improving bending accuracy.

[0014] In some embodiments of this application, a first cylinder is rotatably mounted below the auxiliary plate, the output shaft of the first cylinder acts on the connecting plate and is movably connected to the connecting plate, and an inner baffle and an outer baffle with an L-shaped longitudinal section are respectively provided below the auxiliary plate, and the two ends of the connecting plate are respectively embedded in the inner baffle and the outer baffle.

[0015] The inner and outer baffles assist in the movement of the connecting plate, ensuring that it does not wobble during operation. The L-shaped inner and outer baffles provide additional support and limiting functions.

[0016] In some embodiments of this application, the top surface of the mounting strip is provided with limiting grooves at both ends, the vertical guide plate passes through the middle of the limiting groove, and one of the limiting grooves is provided adjacent to the second segment; an auxiliary plate is provided at one end of the third segment, a baffle is provided on the rear side of the auxiliary plate, the baffle is provided parallel to the auxiliary plate, the end of the sealing strip is mounted on the auxiliary plate and the rear side is limited by the baffle, a positioning seat is provided on the front side of the auxiliary plate, the positioning seat is located at the junction of the second segment and the rear side of the positioning seat forms the grid surface on the front side of the sealing strip.

[0017] The design of the limiting groove ensures stable installation of the sealing strip, preventing it from shifting during movement. The cooperation of the auxiliary plate and the baffle plate ensures stable installation of the sealing strip, preventing it from sliding or shifting during bending. The positioning seat provides a limiting function to ensure the sealing strip is installed in place.

[0018] In this application, the position of the positioning seat can be adjusted as needed. Specifically, a strip-shaped mounting member is provided on the substrate, and multiple mounting holes are regularly formed on the strip-shaped mounting member. The positioning seat can be adjusted and mounted on the strip-shaped mounting member through the mounting holes.

[0019] In some embodiments of this application, a forming seat is provided on the rear side of the second segment. The forming seat is equipped with several standard blocks. The standard blocks are detachably connected to the forming seat. The outer surface of the standard blocks forms the side reference surface for bending the sealing strip. The tensioning component moves to drive the sealing strip to bend backward until the sealing strip adheres to the side reference surface.

[0020] The detachable connection design of the forming base and the standard block allows for quick replacement of the standard block according to different bending requirements, improving the flexibility and adaptability of the equipment. The side reference surface provides a precise bending reference, ensuring high fit and good forming accuracy of the sealing strip during bending.

[0021] In some embodiments of this application, the forming seat is provided with a pressure block connected to the downward pressing power cylinder. The structure of the pressure block is adapted to the structure of the standard block. The pressure block presses down on the top surface of the standard block. The bottom surface of the pressure block forms the upper reference surface of the sealing strip bending. The bottom surface of the pressure block is curved. The top surface structure formed by all the vertical guide plates attached to the side reference surface is adapted to the bottom surface structure of the pressure block.

[0022] The cooperation between the pressure block and the downward-pressing power cylinder ensures that the sealing strip is subjected to downward pressure during bending. The bottom surface of the pressure block is adapted to the side reference surface, ensuring a high degree of fit and good forming quality of the sealing strip during bending. The curved design of the bottom surface of the pressure block indicates that the sealing strip processed in this application also has a bend in the Z-axis direction, rather than a simple horizontal bending structure.

[0023] In some embodiments of this application, the second segment includes multiple base blocks and multiple connecting blocks. The base block is an inverted T-shaped structure block, which includes a horizontal plate and a vertical plate. A vertical guide plate is installed on the top of the vertical plate. Adjacent base blocks are connected by connecting blocks. The connecting blocks have a racetrack-shaped structure and are mounted on the horizontal plate of the base block. The two ends of the connecting blocks are rotatably connected to two adjacent base blocks respectively. A vertical guide plate is installed on the top of the connecting block. There is a gap between two adjacent vertical guide plates and a gap between two adjacent horizontal plates.

[0024] The combination of base blocks and connecting blocks provides excellent flexibility and adaptability, allowing the second section to adjust its angle flexibly during bending. The racetrack-shaped connecting blocks enhance structural stability while allowing relative rotation between adjacent base blocks, accommodating different bending requirements.

[0025] In some embodiments of this application, an embedding groove is provided at the bottom of the outer peripheral surface of the molding seat, and the embedding groove is adapted to the rear end structure of the connecting block horizontal plate; when the sealing strip is attached to the side reference surface, the rear end of the connecting block horizontal plate is inserted into the embedding groove.

[0026] The embedded groove design ensures that the connecting block is locked in place by the forming seat after it has moved into position, preventing it from shaking. This locking function ensures the stability of the bent sealing strip shape and prevents deformation due to the shaking of the connecting block.

[0027] In some embodiments of this application, the surface of the standard block is provided with a clearance groove corresponding to the baffle; when the sealing strip is attached to the side reference surface, the baffle is embedded in the clearance groove. The clearance groove design provides space for the baffle, avoids interference between the baffle and the standard block, and ensures that the sealing strip can smoothly fit the side reference surface during bending. The baffle embedded in the clearance groove further defines the position of the sealing strip and ensures bending accuracy.

[0028] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0029] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0030] Figure 1 A schematic diagram of the structure with the sealing strip installed in this application;

[0031] Figure 2 This is a schematic diagram of the bottom structure of this application;

[0032] Figure 3 This is a schematic diagram of the substrate of this application without the sealing strip installed;

[0033] Figure 4 for Figure 3 Sectional view of the second section;

[0034] Figure 5 This is a schematic diagram of the molding seat in this application.

[0035] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Base plate; 41. First segment; 42. Second segment; 43. Third segment; 44. Mounting strip; 46. Clamping strip; 47. Vertical guide plate; 49. Tensioning assembly; 50. Track; 51. Tensioning power cylinder; 52. Auxiliary plate; 53. Guide groove; 54. Connecting plate; 55. Rotating shaft; 56. Connecting rod; 57. First cylinder; 58. Inner baffle; 59. Outer baffle; 60. Limiting groove; 61. Auxiliary piece; 62. Baffle; 63. Positioning seat; 64. Strip mounting piece; 65. Mounting hole; 66. Forming seat; 67. Standard block; 68. Side reference surface; 69. Pressure block; 70. Downward pressing power cylinder; 71. Upper reference surface; 72. Base block; 73. Connecting block; 74. Horizontal plate; 75. Vertical plate; 76. Embedded groove; 77. Clearance groove. Detailed Implementation

[0036] The present application will now be described in detail with reference to the accompanying drawings.

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] A sealing strip bending assembly, as described in Embodiment 1 Figures 1 to 2 As shown: A substrate 1 is included, on which a first segment 41, a second segment 42, and a third segment 43 are sequentially connected for mounting a sealing strip. The first segment 41 is a mounting strip 44, with a retaining strip 46 on its top surface. The second segment 42 includes multiple vertically connected guide pieces 47, with the sealing strip secured to the retaining strip 46 and the guide pieces 47. The third segment 43 is a long, strip-shaped block structure, with one end rotatably connected to the second segment 42. This application uses multiple rotatably connected vertically connected guide pieces 47 to mount the sealing strip. The connection between the vertically connected guide pieces 47 has good flexibility and very low elastic recovery force. This contrasts with the high elastic recovery force of elastic sheets in the prior art, effectively avoiding the springback phenomenon caused by elastic recovery force after the sealing strip is bent at a large angle, thereby improving bending accuracy. The rotatable connection design of the vertically connected guide pieces 47 gives the sealing strip better flexibility and adaptability during bending, thus adapting to bending requirements of different shapes and angles.

[0039] The other end of the third segment 43 is connected to the tensioning assembly 49. The substrate 1 has a curved track 50, and the tensioning assembly 49 is located within the track 50 and moves along the track 50. This application designs a curved track 50, and the design of the tensioning assembly 49 ensures that the first segment 41, the second segment 42, and the third segment 43 remain taut during movement. This design prevents the sealing strip from wrinkling or deforming during bending, ensuring product quality.

[0040] In summary, through the synergistic effect of the rotating connection of the vertical guide plate 47 and the tensioning assembly 49, large-angle bending can be achieved without being limited by the elastic restoring force of the elastic sheet. This gives the assembly a significant advantage in applications involving large-angle bending, overcoming the limitation of existing technologies where elastic sheets can only achieve small-angle bending.

[0041] Example 2, as Figures 1 to 5 As shown, the tensioning assembly 49 includes a tensioning power cylinder 51, which is horizontally positioned within the track 50. The tensioning power cylinder 51 is aligned with the first section 41, the second section 42, and the third section 43 on the same straight line. The horizontal alignment of the tensioning power cylinder 51 ensures that the sealing strip maintains a straight line during bending, preventing offset or deformation of the sealing strip caused by the tilting of the power cylinder. The phrase "the tensioning power cylinder 51 is aligned with the first section 41, the second section 42, and the third section 43 on the same straight line" refers to the sealing strip being in a straight strip structure even in its non-working and unprocessed states.

[0042] An auxiliary plate 52 is disposed below the base plate 1, parallel to the base plate 1. A guide groove 53 is formed on the auxiliary plate 52, and a connecting plate 54 is mounted below it. One end of the connecting plate 54 is connected to a rotating shaft 55 movably mounted on the auxiliary plate 52, and the other end is connected to a connecting rod 56. The rotating shaft 55 is located at the center of the guide groove 53, and the connecting rod 56 vertically passes through the guide groove 53 and connects to the tensioning power cylinder 51. The auxiliary plate 52 and the parallel base plate 1 work together to provide additional support structure, enhancing the stability of the overall assembly. This application lowers the entire bending assembly, thereby improving its compactness and reducing the size of the equipment. The cooperation between the guide groove 53 and the rotating shaft 55 ensures that the design of the connecting plate 54 and the connecting rod 56 of the tensioning power cylinder 51 allows for smooth movement of the tensioning power cylinder 51, preventing the power cylinder from wobbling within the track 50 and improving bending accuracy.

[0043] A first cylinder 57 is rotatably mounted below the auxiliary plate 52. The output shaft of the first cylinder 57 acts on the connecting plate 54 and is movably connected to the connecting plate 54. An inner baffle 58 and an outer baffle 59 with an L-shaped longitudinal section are respectively provided below the auxiliary plate 52. Both ends of the connecting plate 54 are embedded in the inner baffle 58 and the outer baffle 59, respectively. The inner baffle 58 and the outer baffle 59 assist the movement of the connecting plate 54, ensuring that the connecting plate 54 does not wobble during movement. The L-shaped inner baffle 58 and the outer baffle 59 provide additional support and limiting functions.

[0044] The mounting strip 44 has limiting grooves 60 at both ends of its top surface. The vertical guide plate 47 passes through the middle of the limiting grooves 60, with one limiting groove 60 adjacent to the second segment 42. An auxiliary piece 61 is provided at one end of the third segment 43, and a baffle 62 is provided on the rear side of the auxiliary piece 61. The baffle 62 is parallel to the auxiliary piece 61, and the end of the sealing strip is mounted on the auxiliary piece 61 and limited at the rear by the baffle 62. A positioning seat 63 is provided on the front side of the auxiliary piece 61, located at the junction of the second segment 42. The rear side of the positioning seat 63 forms the front guard surface of the sealing strip. The design of the limiting grooves 60 ensures stable installation of the sealing strip, preventing it from shifting during movement. The cooperation of the auxiliary piece 61 and the baffle 62 ensures stable installation of the sealing strip, preventing it from sliding or shifting during bending. The positioning seat 63 provides a limiting function, ensuring the sealing strip is installed in place.

[0045] In this application, the position of the positioning seat 63 can be adjusted as needed. Specifically, a strip-shaped mounting member 64 is provided on the substrate 1, and a plurality of mounting holes 65 are regularly opened on the strip-shaped mounting member 64. The positioning seat 63 can be adjusted and mounted on the strip-shaped mounting member 64 through the mounting holes 65.

[0046] The rest of the contents of Example 2 are the same as those of Example 1.

[0047] Example 3, as Figures 1 to 5 As shown, a forming seat 66 is provided on the rear side of the second segment 42. The forming seat 66 is equipped with several standard blocks 67. The standard blocks 67 are detachably connected to the forming seat 66. The outer surface of the standard blocks 67 forms the side reference surface 68 for bending the sealing strip. The tensioning component 49 moves to drive the sealing strip to bend backward until the sealing strip fits against the side reference surface 68. The detachable connection design of the forming seat 66 and the standard blocks 67 allows for quick replacement of the standard blocks 67 according to different bending requirements, improving the flexibility and adaptability of the equipment. The side reference surface 68 provides a precise bending reference, ensuring high fit and good forming accuracy of the sealing strip during bending.

[0048] The forming seat 66 is provided with a pressure block 69 connected to the downward pressing power cylinder 70. The structure of the pressure block 69 is adapted to the structure of the standard block 67. The pressure block 69 presses down on the top surface of the standard block 67. The bottom surface of the pressure block 69 forms the upper reference surface 71 for bending the sealing strip. The bottom surface of the pressure block 69 is curved, and the top surface structure formed by all the vertical guide plates 47 that are attached to the side reference surface 68 is adapted to the bottom surface structure of the pressure block 69. The cooperation between the pressure block 69 and the downward pressing power cylinder 70 ensures that the sealing strip is also subjected to downward pressure during the bending process. The adaptation of the bottom surface of the pressure block 69 to the side reference surface 68 ensures high fit and good forming quality of the sealing strip during bending. The curved design of the bottom surface of the pressure block 69 indicates that the sealing strip processed in this application also has a bend in the Z-axis direction, rather than a simple horizontal bending structure.

[0049] The second segment 42 includes multiple base blocks 72 and multiple connecting blocks 73. Each base block 72 is an inverted T-shaped structure, comprising a horizontal plate 74 and a vertical plate 75. A vertical guide plate 47 is mounted on the top of the vertical plate 75. Adjacent base blocks 72 are connected by connecting blocks 73, which have a racetrack-shaped structure. The connecting blocks 73 are mounted on the horizontal plate 74 of the base blocks 72, and their ends are rotatably connected to two adjacent base blocks 72. Vertical guide plates 47 are mounted on the top of the connecting blocks 73, with a gap between adjacent vertical guide plates 47 and a gap between adjacent horizontal plates 74. The combined design of the base blocks 72 and connecting blocks 73 provides good flexibility and adaptability, allowing the second segment 42 to adjust its angle flexibly during bending. The racetrack-shaped connecting blocks 73 enhance structural stability while allowing relative rotation between adjacent base blocks 72, adapting to different bending requirements.

[0050] The bottom of the outer peripheral surface of the molding base 66 is provided with an embedding groove 76, which is adapted to the rear end structure of the horizontal plate 74 of the connecting block 73. When the sealing strip is attached to the side reference surface 68, the rear end of the horizontal plate 74 of the connecting block 73 is inserted into the embedding groove 76. The setting of the embedding groove 76 ensures that after the connecting block 73 moves into place, it is locked by the molding base 66 to prevent shaking. The locking function ensures that the shape of the bent sealing strip is stable and will not be deformed due to the shaking of the connecting block 73.

[0051] The standard block 67 has a clearance groove 77 on its surface corresponding to the baffle 62. When the sealing strip is attached to the side reference surface 68, the baffle 62 is embedded in the clearance groove 77. The clearance groove 77 provides space for the baffle 62, avoiding interference between the baffle 62 and the standard block 67, and ensuring that the sealing strip can smoothly fit the side reference surface 68 during bending. The baffle 62 embedded in the clearance groove 77 further defines the position of the sealing strip, ensuring bending accuracy.

[0052] The other contents of Example 3 are the same as those of Example 1 or Example 2.

[0053] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A sealing strip bending assembly, characterized in that, The substrate (1) includes a first section (41), a second section (42) and a third section (43) connected in sequence for mounting a sealing strip. The first section (41) is a mounting strip (44), and a retaining strip (46) is provided on the top surface of the mounting strip (44). The second section (42) includes a plurality of vertical guide plates (47) rotatably connected. The sealing strip is snapped onto the retaining strip (46) and the vertical guide plates (47). The third section (43) is a long strip block structure. One end of the third section (43) is rotatably connected to the second section (42), and the other end of the third section (43) is connected to the tensioning assembly (49). The substrate (1) has a curved track (50), and the tensioning assembly (49) is located in the track (50) and moves along the track (50).

2. The sealing strip bending assembly according to claim 1, characterized in that, The tensioning assembly (49) includes a tensioning power cylinder (51), which is horizontally positioned within the track (50). The tensioning power cylinder (51) is located on the same straight line as the first section (41), the second section (42), and the third section (43).

3. A sealing strip bending assembly according to claim 1, characterized in that, An auxiliary plate (52) is provided below the base plate (1). The auxiliary plate (52) is parallel to the base plate (1). A guide groove (53) is provided on the auxiliary plate (52). A connecting plate (54) is installed below the auxiliary plate (52). One end of the connecting plate (54) is connected to a rotating shaft (55) that is movably installed on the auxiliary plate (52). The other end of the connecting plate (54) is connected to a connecting rod (56). The rotating shaft (55) is located at the center of the guide groove (53). The connecting rod (56) passes vertically through the guide groove (53) and is connected to the tensioning power cylinder (51).

4. A sealing strip bending assembly according to claim 3, characterized in that, A first cylinder (57) is rotatably mounted below the auxiliary plate (52). The output shaft of the first cylinder (57) acts on the connecting plate (54) and is movably connected to the connecting plate (54). An inner baffle (58) and an outer baffle (59) with an L-shaped longitudinal section are respectively provided below the auxiliary plate (52). The two ends of the connecting plate (54) are respectively embedded in the inner baffle (58) and the outer baffle (59).

5. A sealing strip bending assembly according to claim 1, characterized in that, The mounting strip (44) has limiting grooves (60) at both ends of its top surface. The vertical guide plate (47) passes through the middle of the limiting groove (60). One of the limiting grooves (60) is located near the second section (42). The third section (43) has an auxiliary plate (61) at one end. A baffle (62) is provided on the rear side of the auxiliary plate (61). The baffle (62) is parallel to the auxiliary plate (61). The end of the sealing strip is mounted on the auxiliary plate (61) and its rear side is limited by the baffle (62). A positioning seat (63) is provided on the front side of the auxiliary plate (61). The positioning seat (63) is located at the junction of the second section (42) and the second section (42). The rear side of the positioning seat (63) forms the grid surface on the front side of the sealing strip.

6. A sealing strip bending assembly according to claim 1, characterized in that, The second segment (42) is provided with a molding seat (66) on the rear side. The molding seat (66) is equipped with several standard blocks (67). The standard blocks (67) are detachably connected to the molding seat (66). The outer surface of the standard blocks (67) forms the side reference surface (68) for the sealing strip to be bent. The tensioning component (49) moves to drive the sealing strip to bend backward until the sealing strip is attached to the side reference surface (68).

7. A sealing strip bending assembly according to claim 6, characterized in that, The forming seat (66) is provided with a pressure block (69) connected to the pressing power cylinder (70). The structure of the pressure block (69) is adapted to the structure of the standard block (67). The pressure block (69) presses down on the top surface of the standard block (67). The bottom surface of the pressure block (69) forms the upper reference surface (71) of the sealing strip bending. The bottom surface of the pressure block (69) is curved. The top surface structure formed by all the vertical guide plates (47) attached to the side reference surface (68) is adapted to the bottom surface structure of the pressure block (69).

8. A sealing strip bending assembly according to claim 1, characterized in that, The second segment (42) includes multiple base blocks (72) and multiple connecting blocks (73). The base block (72) is an inverted T-shaped structure block. The base block (72) includes a horizontal plate (74) and a vertical plate (75). A vertical guide plate (47) is installed on the top of the vertical plate (75). Two adjacent base blocks (72) are connected by a connecting block (73). The connecting block (73) has a racetrack-shaped structure. The connecting block (73) is mounted on the horizontal plate (74) of the base block (72). The two ends of the connecting block (73) are rotatably connected to two adjacent base blocks (72) respectively. A vertical guide plate (47) is installed on the top of the connecting block (73). There is a gap between two adjacent vertical guide plates (47) and between two adjacent horizontal plates (74).

9. A sealing strip bending assembly according to claim 6, characterized in that, The bottom of the outer peripheral surface of the molding seat (66) is provided with an embedding groove (76), which is adapted to the rear end structure of the horizontal plate (74) of the connecting block (73); when the sealing strip is attached to the side reference surface (68), the rear end of the horizontal plate (74) of the connecting block (73) is inserted into the embedding groove (76).

10. A sealing strip bending assembly according to claim 6, characterized in that, The standard block (67) has a clearance groove (77) on its surface corresponding to the baffle (62); when the sealing strip is attached to the side reference surface (68), the baffle (62) is embedded in the clearance groove (77).

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