A sunroof sealing system design method

Abstract

The application relates to a sunroof sealing system design method, which comprises the following steps: obtaining a top cover outer plate modeling surface, determining a rubber belt bonding surface; determining the upper boundary of a sunroof outer sealing strip; determining the upper boundary of a sunroof glass surface; determining the intersection of the upper boundary of the sunroof glass surface and a sunroof glass movement track; determining the width definition value of a sunroof glass injection sealing surface; taking the upper boundary point of the sunroof glass injection sealing surface as a starting point, and making a chord length line with a length of the width definition value along the sunroof glass movement track; taking the midpoint of the chord length line and the midpoint of the section line of the rubber belt bonding surface to form a straight line; taking the midpoint of the section line of the rubber belt bonding surface as a circle center, and making a circle with the length of the straight line as a radius to obtain a first circle; taking the sealing fit amount of a bubble tube of the sunroof outer sealing strip and the sunroof glass injection sealing surface as an offset value, and offsetting the first circle concentrically to obtain a second circle. The application can more accurately find the best fit position of the sunroof sealing system.

Description

Technical Field

[0001] This invention relates to automobiles, and more specifically to a design method for a sunroof sealing system. Background Technology

[0002] The vehicle body's sealing system involves performance indicators such as NVH performance, waterproof and dustproof performance, airtightness, and sound quality of opening and closing parts. The same applies to the sunroof sealing system, which is a result of consumer configuration upgrades. The direct factor determining the sealing effect of the sunroof sealing system is the cooperation between the sealing strip installation subsystem and the sealing strip compression subsystem.

[0003] like Figure 1 As shown, the theoretical basis of the conventional sunroof sealing system design method is that the centerline of the sunroof outer sealing strip is perpendicular to the sealing surface at a 90-degree angle. The conventional sunroof sealing system design method includes the following steps:

[0004] S1: Determine the outer panel of the roof hood 101 and the sunroof glass 104 based on the preliminary styling of the automobile;

[0005] S2: Through the engineering of the outer panel of the roof (engineering of the outer panel of the roof: analysis of the stamping process of the flange angle of the outer panel of the roof), the flange at the skylight opening of the outer panel of the roof is determined, and the adhesive tape bonding surface 102 is determined on the flange.

[0006] S3: Determine the midpoint 103 of the cross-sectional line of the adhesive tape bonding surface 102, and determine the auxiliary straight line 107 that passes through the midpoint 103 and is perpendicular to the cross-sectional line of the adhesive tape bonding surface 102. The auxiliary straight line 107 is the center line of the sunroof outer sealing strip 110.

[0007] S4: Determine the intersection point 106 of the auxiliary straight line 107 and the trajectory line 111 of the sunroof glass injection molding edge 105. The intersection point 106 is the point where the amount of fit between the bubble tube of the sunroof outer sealing strip 110 and the sunroof glass injection molding edge 105 is the maximum when the sunroof is closed.

[0008] S5: With midpoint 103 as the center and the distance between midpoint 103 and intersection point 106 as the radius, draw a circle to obtain the first auxiliary circle 108; then, with the sealing fit between the bubble tube of the sunroof outer sealing strip 110 and the sunroof glass injection molding edge 105 as the offset value, offset the first auxiliary circle 108 outward concentrically to obtain the second auxiliary circle 109. The boundary of the inner ring of the sunroof outer sealing strip 110 can be determined according to the first auxiliary circle 108 and the second auxiliary circle 109.

[0009] Conventional sunroof sealing system design methods have the following technical problems:

[0010] The intersection point 106 obtained by conventional sunroof sealing system design methods is biased towards the outside of the vehicle. Furthermore, because the sunroof glass injection molding edge 105 requires a certain angle during manufacturing, in actual engineering, the sealing surface on the sunroof glass injection molding edge 105 that mates with the sunroof outer sealing strip 110 is difficult to make perfectly perpendicular to the auxiliary straight line 107. This results in a larger sealing gap in the sunroof sealing system, causing the position of maximum sealing fit between the sunroof outer sealing strip 110 and the sunroof glass injection molding edge 105 to shift towards the outside of the vehicle. The closer the optimal sealing position is to the outside of the vehicle, the worse the sealing effect. In other words, conventional sunroof sealing system design methods cannot obtain the optimal sealing point (i.e., the position of maximum sealing fit) between the sunroof outer sealing strip and the sunroof front glass injection molding edge, leading to poor and unstable sealing performance, and even problems that consumers can directly perceive, such as water leakage, poor airtightness, and poor sound insulation. Summary of the Invention

[0011] The purpose of this invention is to propose a design method for a sunroof sealing system, which is beneficial to improving the sealing performance of the sunroof sealing system.

[0012] The present invention discloses a design method for a sunroof sealing system, comprising the following steps:

[0013] S1: Obtain the shape surface of the outer panel of the roof, determine the flange at the skylight opening of the outer panel of the roof through engineering, and determine the adhesive tape bonding surface on the flange.

[0014] S2: Based on the DTS definition of the outer surface of the car body, determine the surface difference definition value between the outer panel of the roof and the outer sealing strip of the sunroof; based on the shape surface of the outer panel of the roof obtained in S1, determine the upper boundary of the outer sealing strip of the sunroof.

[0015] S3: Based on the DTS definition of the outer surface of the car body, determine the surface difference definition value between the sunroof outer sealing strip and the sunroof glass surface; based on the upper boundary of the sunroof outer sealing strip determined in S2, determine the upper boundary of the sunroof glass surface.

[0016] S4: Determine the intersection point of the upper boundary of the sunroof glass surface and the movement trajectory of the sunroof glass. This intersection point is the upper boundary point of the injection-molded sealing surface of the sunroof glass.

[0017] S5: Based on the standard cross-section design definition, determine the width definition value of the sunroof glass injection molding sealing surface. Taking the upper boundary point of the sunroof glass injection molding sealing surface as the starting point, draw a chord line with a length equal to the width definition value along the movement trajectory of the sunroof glass. The endpoint of the chord line is the lower boundary point of the sunroof glass injection molding sealing surface. The chord line is the cross-sectional line of the sunroof glass injection molding sealing surface.

[0018] S6: Take the straight line connecting the midpoint of the chord length line and the midpoint of the cross-sectional line of the adhesive tape bonding surface;

[0019] S7: Using the midpoint of the cross-sectional line of the adhesive tape as the center and the length of the straight line as the radius, draw a circle to obtain a first circle; using the sealing fit between the bubble tube of the sunroof outer sealing strip and the injection molding sealing surface of the sunroof glass as the offset value, the first circle is offset concentrically to obtain a second circle, and the inner ring boundary of the sunroof outer sealing strip is determined according to the second circle.

[0020] Optionally, in S1, the roof outer panel styling surface is obtained from the vehicle styling surface.

[0021] Optionally, the cross-sectional line of the injection-molded sealing surface of the sunroof glass and the cross-sectional line of the adhesive tape bonding surface are both located at the Y0 position of the entire vehicle.

[0022] Optionally, after S1, the following step is also included: determining the width of the edge on the flange for engaging with the outer sealing strip of the sunroof, based on the standard cross-section design definition.

[0023] This invention can more accurately locate the optimal matching position of the sunroof sealing system, which is beneficial to improving the sealing effect of the panoramic sunroof sealing system. Attached Figure Description

[0024] Figure 1 A schematic diagram illustrating a conventional sunroof sealing system design method;

[0025] Figure 2 This is one of the schematic diagrams of the sunroof sealing system design method proposed in this invention;

[0026] Figure 3 This is the second schematic diagram of the sunroof sealing system design method proposed in this invention;

[0027] Figure 4 For comparison.

[0028] Among them, 1-top cover outer panel shape surface; 2-adhesive tape bonding surface; 3-first midpoint; 4-sunroof glass surface; 5-sunroof glass movement trajectory; 6-upper boundary point; 7-lower boundary point; 8-sunroof glass injection molding sealing surface; 9-second midpoint; 10-straight line; 11-first circle; 12-second circle; 13-sunroof outer sealing strip; 14-sunroof glass movement trajectory axis. Detailed Implementation

[0029] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0030] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] like Figure 2 and Figure 3 The above-described design method for a sunroof sealing system includes the following steps:

[0032] S1: Obtain the top cover outer panel shaping surface 1, determine the flange at the skylight opening of the top cover outer panel through engineering, determine the tape bonding surface 2 on the flange, and determine the outer ring boundary of the skylight outer sealing strip 13 based on the tape bonding surface 2 and the size of the selected tape; in specific implementation, the engineering of the top cover outer panel includes the analysis of the stamping process of the flange angle of the top cover outer panel. The skylight outer sealing strip 13 and the tape bonding surface 2 are usually bonded with 3M tape. The defined value B of the tape bonding surface 2 can be determined according to the standard cross-section design definition;

[0033] S2: Based on the DTS definition of the outer surface of the car body, determine the surface difference definition value between the outer panel of the roof and the outer sealing strip of the sunroof 13. Based on the outer panel of the roof shape surface 1 obtained in S1 and the surface difference definition value determined in this step, determine the upper boundary of the outer sealing strip of the sunroof 13. The DTS definition of the outer surface of the car body includes the gap and surface difference design requirements between various components of the interior and exterior of the vehicle.

[0034] S3: Based on the DTS definition of the outer surface of the car body, determine the surface difference definition value A between the sunroof outer sealing strip 13 and the sunroof glass surface 4. Based on the upper boundary of the sunroof outer sealing strip 13 determined in S2 and the surface difference definition value A determined in this step, determine the upper boundary of the sunroof glass surface 4.

[0035] S4: Determine the intersection point of the upper boundary of the sunroof glass surface 4 and the sunroof glass movement trajectory 5. This intersection point is the upper boundary point 6 of the sunroof glass injection molding sealing surface 8. In specific implementation, the sunroof glass movement trajectory 5 and the sunroof glass movement trajectory axis 14 can be obtained from the sunroof supplier.

[0036] S5: Based on the standard cross-sectional design definition, determine the width definition value C of the sunroof glass injection molding sealing surface 8. Taking the upper boundary point 6 of the sunroof glass injection molding sealing surface 8 as the starting point, draw a chord line with a length of the width definition value C along the sunroof glass movement trajectory 5. The endpoint of the chord line is the lower boundary point 7 of the sunroof glass injection molding sealing surface 8. The chord line is the cross-sectional line of the sunroof glass injection molding sealing surface 8. The width and angle of the sunroof glass injection molding sealing surface 8 can be determined through this chord line. At the same time, the midpoint of this chord line can optimize the rotation axis of the sunroof movement mechanism, so that the curvature of the movement curve during the opening and closing process of the sunroof is similar to the curvature of the sunroof glass injection molding sealing surface 8, thereby ensuring the best fit between the sunroof glass injection molding sealing surface 8 and the sunroof outer sealing strip 13 during the opening and closing process of the sunroof.

[0037] S6: The midpoint of the cross-sectional line of the adhesive tape bonding surface 2 is the first midpoint 3, and the midpoint of the chord line is the second midpoint 9. The straight line 10 connecting the first midpoint 3 and the second midpoint 9 is taken. According to the matching relationship between the bubble tube of the sunroof outer sealing strip 13 and the injection molding sealing surface 8 of the sunroof glass, the sealing effect is best when the interference between the bubble tube of the sunroof outer sealing strip 13 and the injection molding sealing surface 8 of the sunroof glass is the largest at the center. The straight line 10 connecting the midpoint of the chord line and the midpoint of the cross-sectional line of the adhesive tape bonding surface 2 can guide the cross-sectional design of the sunroof outer sealing strip 13. The straight line 10 is called the center line of the sunroof outer sealing strip 13.

[0038] S7: Using the midpoint of the cross-sectional line of the adhesive tape 2 as the center and the length of the straight line 10 as the radius, draw a circle to obtain the first circle 11; using the sealing fit between the bubble tube of the sunroof outer sealing strip 13 and the sunroof glass injection molding sealing surface 8 as the offset value, the first circle 11, which is concentrically offset, is used to obtain the second circle 12. The inner ring boundary of the sunroof outer sealing strip 13 is determined according to the second circle 12. The first circle 11 and the second circle 12 can guide the cross-sectional design of the sunroof outer sealing strip 13.

[0039] In some embodiments, in S1, the roof outer panel styling surface 1 is obtained from the vehicle styling surface. The vehicle styling surface can be a preliminary vehicle styling surface or a final vehicle styling surface, and can be obtained from the styling department.

[0040] In some embodiments, the cross-sectional lines of the sunroof glass injection molding sealing surface 8 and the adhesive tape bonding surface 2 are both located at the Y0 position of the entire vehicle. In other words, the above-described sunroof sealing system design method involves designing the cross-section of the sunroof sealing system at the Y0 position, using the designed cross-sectional parameters to guide the design of the sunroof sealing system.

[0041] In some embodiments, after S1, the following step is further included: determining the width of the edge on the flange for engaging with the outer sealing strip 13 of the sunroof based on the standard cross-sectional design definition, thereby determining the design cross-sectional boundary of the outer cover panel.

[0042] like Figure 4 As shown, relative to the midpoint of the chord length line determined by the sunroof sealing system design method proposed in this invention, the intersection of the auxiliary straight line 107 determined by the conventional sunroof sealing system design method and the sunroof glass injection molding sealing surface 8 is biased towards the outside of the vehicle. Moreover, since the sunroof glass injection molding sealing surface 8 needs to be demolded at a certain angle during the manufacturing process, the actual engineered sunroof glass injection molding sealing surface 8 cannot be completely perpendicular to the auxiliary straight line 107. Therefore, compared to the sunroof sealing system designed by the sunroof sealing system design method proposed in this invention, the sealing gap of the sunroof sealing system designed according to the conventional sunroof sealing system design method will be larger, and the optimal sealing position will be biased towards the outside of the vehicle.

[0043] Comparative analysis reveals that the sunroof sealing system design method proposed in this invention can more accurately identify the optimal sealing position of the sunroof sealing system from both static design and motion simulation design perspectives. It also more systematically correlates the relationships between the shape, DTS (Design for System), motion simulation, and standard cross-sections. Furthermore, it guides the optimization of the outer, upper, and inner boundary designs of the sunroof outer sealing strip 13. The optimal sealing position of the sunroof sealing system is the best position where the outer sealing strip 13 and the sunroof glass injection-molded edge seal are properly fitted when the sunroof is closed.

[0044] This invention improves the accuracy of the design, increases the tolerance of the sunroof sealing system assembly process, enhances the sealing effect of the sunroof sealing system, and prevents defects such as water leakage, air leakage, and poor sound insulation from occurring in the sunroof sealing system.

[0045] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. In the description of this specification, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A sunroof sealing system design method, characterized by, The method comprises the following steps: S1: obtaining a roof outer plate molding surface, determining a flange at a sunroof aperture of the roof outer plate through roof outer plate engineering, and determining a adhesive bonding surface on the flange; S2: determining a surface difference definition value of the roof outer plate and a sunroof outer sealing strip based on a vehicle body outer surface DTS definition, and determining an upper boundary of the sunroof outer sealing strip based on the roof outer plate molding surface obtained in S1; S3: determining a surface difference definition value of the sunroof outer sealing strip and a sunroof glass surface based on the vehicle body outer surface DTS definition, and determining an upper boundary of the sunroof glass surface based on the upper boundary of the sunroof outer sealing strip determined in S2; S4: determining an intersection point of the upper boundary of the sunroof glass surface and a sunroof glass movement track, and the intersection point is an upper boundary point of a sunroof glass injection sealing surface; S5: determining a width definition value of the sunroof glass injection sealing surface based on a standard section design definition, taking the upper boundary point of the sunroof glass injection sealing surface as a starting point, and drawing a chord line with a length of the width definition value along the sunroof glass movement track, and a terminal point of the chord line is a lower boundary point of the sunroof glass injection sealing surface, and the chord line is a section line of the sunroof glass injection sealing surface; S6: connecting a straight line with a midpoint of the chord line and a midpoint of a section line of the adhesive bonding surface; S7: taking the midpoint of the section line of the adhesive bonding surface as a center, and taking a length of the straight line as a radius to draw a first circle, taking a sealing fit amount of a bubble tube of the sunroof outer sealing strip and the sunroof glass injection sealing surface as an offset value, and offsetting the first circle concentrically to obtain a second circle, and determining an inner ring boundary of the sunroof outer sealing strip according to the second circle.

2. The sunroof sealing system design method of claim 1, wherein In S1, the roof outer plate molding surface is obtained from a vehicle molding surface.

3. The sunroof sealing system design method of claim 1, wherein The section line of the sunroof glass injection sealing surface and the section line of the adhesive bonding surface are located at a Y0 position of the whole vehicle.

4. The sunroof sealing system design method of claim 1, wherein After S1, the following step is further included: determining a width of an edge of the flange for clamping the sunroof outer sealing strip based on a standard section design definition.

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