Vehicle door glass pre-bending molded surface design method, analogue simulation system, device and storage medium

Abstract

The invention provides a vehicle door glass pre-bending molded surface design method, an analogue simulation system, a device and a storage medium. The vehicle door glass pre-bending molded surface design method comprises the following steps: defining a pre-bending area and a pre-bending amount according to glass molded surface data, and constructing a glass pre-bending molded surface according to the pre-bending area and the pre-bending amount data; the pre-bending molded surface of the vehicle door glass is designed by optimizing the pre-bending molded surface of the glass according to the glass forming parameters, the vehicle door glass with the molded surface pre-bending in a local area can be obtained by means of the design method, and outward deformation of the vehicle door glass is counteracted; and a good sealing state of a vehicle door glass area and a normal lifting function of glass are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of door glass design and assembly, and in particular relates to a door glass pre-bent profile design method, a simulation system, a device and a storage medium. Background Art

[0002] During the vehicle assembly process, the door glass in the installed state (especially for frameless doors) is easily squeezed by the sealing strip and deformed toward the outside of the vehicle due to the interference fit with the door sealing strip, resulting in poor matching and affecting the sealing effect of the window. When the vehicle is driving, especially when driving at high speed and the windows are closed, the air flow inside the car is poor. The air outside the car is flowing relative to the car. According to the principles of fluid mechanics, the air pressure inside the car is higher and the air pressure outside the car is lower, resulting in an air pressure difference inside and outside the car. Since the door glass is movable glass and is not completely fixed to the car body by means of glass glue bonding, the door glass tends to deform toward the outside of the car under the action of the air pressure difference, affecting the sealing of the door system and the lifting of the door glass, especially the area above the door glass that is not constrained by the glass lifter. This problem is particularly obvious.

[0003] For the above problems, some models start from the perspective of door sheet metal and perform certain pre-deformation design on the sheet metal to improve the matching effect between the whole door and the sealing strip. Pre-deformation design of sheet metal is helpful to improve the matching effect between the whole door and the sealing strip to a certain extent. However, the door glass and the door sheet metal are actually in soft contact, and have a certain amount of relative movement along the side of the car. They will be squeezed outward by the sealing strip, and affected by the pressure difference between the inside and outside of the car, they will further deform outward on the basis of the deformation of the door. The above design schemes fail to solve the problem of door glass deformation.

[0004] Invention patent content

[0005] In view of the above problems, the present invention seeks a solution from the perspective of door glass deformation, and provides a door glass pre-bent profile design method, simulation system, device and storage medium. With the help of the design method, a door glass with a pre-bent profile in a local area can be obtained, which can offset the outward deformation of the door glass, ensure a good sealing state of the door glass area and normal lifting function of the glass. The purpose of the present invention is achieved through the following technical solutions:

[0006] The present invention first provides a method for designing a pre-bent profile of a vehicle door glass, which comprises:

[0007] Step S10: defining a pre-bending area according to glass profile data;

[0008] Step S20: defining the pre-bending amount; in particular, defining the maximum pre-bending position and the maximum pre-bending amount;

[0009] Step S30: constructing a glass pre-bending profile according to the pre-bending area and pre-bending amount data;

[0010] Step S40: Optimizing the glass pre-bent profile according to the glass forming parameters.

[0011] Further, in step S10, the pre-bending area is defined including the following steps:

[0012] Step S11: confirming the pre-bending area definition model according to the glass shape and the window constraint conditions; different glass shapes have different pre-bending area definition models and algorithms, so as to better match the pre-bending deformation required by different vehicle models and window structures;

[0013] Step S12a: when the pre-bending area definition model confirmed in step S11 is a first type of model, locating the glass vertex and upper edge curve according to the pre-bending area definition model, and generating a first pre-bending line according to the acquired vertex and upper edge curve;

[0014] Step S12b: when the pre-bending area definition model confirmed in step S11 is a second type of model, locating a projection line of the window sill molding projected onto the door glass according to the pre-bending area definition model, and generating a second pre-bending line according to the projection line;

[0015] Step S13: Define a pre-bending zone according to parameters including the first pre-bending line or the second pre-bending line, and a glass boundary line; typically the pre-bending zone is defined as the area between the first pre-bending line or the second pre-bending line and the glass boundary above the first pre-bending line or the second pre-bending line.

[0016] Generally, the first type of model is set for the case where the glass is constrained by the window rail and cannot move in the lateral direction of the vehicle or the movement is small, and the second type of model is set for the case where the window rail cannot provide sufficient constraint force on the side of the glass (such as the door glass of a frameless door, etc.). In most cases, since the pre-bending deformation area required by the first type of model is smaller than the pre-bending deformation area required by the second type of model, the second pre-bending line is usually lower than the first pre-bending line.

[0017] Further, in step S20, the following steps are included when defining the pre-bending amount:

[0018] Step S21: locating the maximum pre-bending position in the pre-bending area defined in step S10;

[0019] Step S22: Define the maximum pre-bending amount required for deformation at the maximum pre-bending position according to the glass profile data, wherein the glass profile data includes the glass shape, structure and thickness. Usually, the maximum pre-bending amount does not exceed 3 mm.

[0020] Furthermore, when constructing the glass pre-bending profile in step S30, the pre-bending amount at the first pre-bending line obtained in step S12a or the second pre-bending line obtained in step S12b is 0, and the deformation amount at the maximum pre-bending is the maximum pre-bending amount to make the profile uniformly gradually changed.

[0021] Further, when optimizing the pre-bent profile of the glass in step S40, the curvature of the pre-bent profile of the glass formed after pre-bending in step S30 is analyzed, and the pre-bent profile is optimized according to the glass forming parameters. In this step, the pre-bent profile is optimized by combining the manufacturing feasibility of the glass to ensure that the designed pre-bent profile can be effectively manufactured.

[0022] Furthermore, for door glass that needs secondary pre-bending, the entire profile pre-bending process is usually completed according to the second type of model, and then the secondary pre-bending profile design is completed according to the first type of model in step S10 based on the profile data after the initial pre-bending, and subsequent steps are executed to achieve the pre-bending of the door glass profile of vehicles with special requirements for secondary pre-bending.

[0023] A second aspect of the present invention is to provide a simulation system for pre-bending of vehicle door glass, which comprises:

[0024] A data acquisition module, used to collect glass surface data, wherein the glass surface data includes glass shape, structure, thickness and boundary size data;

[0025] A model matching module, used for matching the pre-bending zone definition model according to the glass shape. Preferably, the model matching module stores the pre-bending zone definition parameters and corresponding definition algorithms preset according to the door glass shape structure matching different vehicle models;

[0026] A pre-bending zone definition module, used to define the pre-bending zone according to the glass profile data, preferably, the pre-bending zone is defined by inputting corresponding parameters according to the pre-bending zone definition model matched by the model matching module;

[0027] A pre-bending amount definition module is used to define the maximum pre-bending position and the maximum pre-bending amount in the designated pre-bending area;

[0028] A glass pre-bending profile construction module is used to construct a glass pre-bending profile according to glass profile data, pre-bending area and maximum pre-bending amount;

[0029] The verification and optimization module is used to analyze the curvature of the glass pre-bent profile formed by the glass pre-bent profile construction module, and to optimize the pre-bent profile according to the manufacturing feasibility of the glass to generate the optimally designed glass pre-bent profile.

[0030] The third aspect of the present invention is to provide a simulation device for pre-bending of vehicle door glass, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and is characterized in that the processor implements the aforementioned method for designing the pre-bending profile of vehicle door glass when executing the computer program.

[0031] A fourth aspect of the present invention is to provide a computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the aforementioned method for designing a pre-bent profile of a vehicle door glass.

[0032] The beneficial effects of the present invention are:

[0033] (1) The present invention provides an effective solution to the door assembly stability, door sealing, and glass lifting stability from the perspective of glass surface design by defining the door glass pre-bend;

[0034] (2) The design method of the present invention takes into account the impact of glass manufacturing feasibility on the profile structure when optimizing the construction of the glass pre-bent profile, so that the glass pre-bent profile generated by the design method of the present invention can effectively match the production and application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 FIG. 1 is a schematic diagram of a process of designing a pre-bent profile of a vehicle door glass in Embodiment 1 of the present invention;

[0036] Figure 2 It is a schematic diagram of defining the pre-bending area in Embodiment 1 of the present invention;

[0037] Figure 3 It is a schematic diagram of defining the pre-bending amount in Embodiment 1 of the present invention;

[0038] Figure 4 FIG. 1 is a schematic diagram of the construction of a glass pre-bending model in Example 1 of the present invention;

[0039] Figure 5 It is a schematic diagram of defining the pre-bending area in Embodiment 2 of the present invention;

[0040] Figure 6 Shown is a schematic diagram of a vehicle door glass pre-bent profile design system in Example 3 of the present invention. DETAILED DESCRIPTION

[0041] The technical scheme of the preferred embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Embodiment 1:

[0043] This embodiment provides a method for designing a pre-bent profile of a door glass. Figure 1 to Figure 4 As shown, the process of implementing the glass pre-bent profile design method is as follows:

[0044] Step S10: define the pre-bending area according to the glass profile data; Figure 2 Taking the door glass shown in the figure as an example, the process includes the following steps:

[0045] Step S11: confirming the pre-bending area definition model according to the glass shape; different glass shapes have different pre-bending area definition models and algorithms, so as to better match the pre-bending deformation required by different vehicle models and window structures;

[0046] When the pre-bending area definition model confirmed in step S11 is a first type of model, step S12a is executed: according to the pre-bending area definition model confirmed in step S11, the upper edge curve of the glass vertex is located, and a first pre-bending line is generated according to the acquired vertex and upper edge curve; Figure 2 As shown, the first vertex A and the second vertex B of the door glass and the upper edge curve AB from the first vertex A to the second vertex B are located; the first vertex A and the second vertex B are connected to form a line segment AB, and the upper edge curve AB of the door glass is rotated around the line segment AB as an axis and intersects with the glass profile to obtain a first pre-bent line a;

[0047] Step S13: Define the pre-bending area according to the parameters including the first pre-bending line and the glass boundary line. Figure 2 When the sides where AF and BE are located) are constrained by the window track and basically have no movement or the movement is small along the vehicle side direction, the area surrounded by the first pre-bending line a and the glass boundary above the first pre-bending line a is defined as the pre-bending area.

[0048] When the pre-bending zone definition model confirmed in step S11 is a second type model, step S12b is executed: locate the projection line of the window sill molding projected onto the door glass according to its pre-bending zone definition model, and generate a second pre-bending line according to the projection line. For example, if the window guide rail cannot provide sufficient restraint force on the side of the glass, especially for the door glass of a frameless door, the second pre-bending line c is generated according to the projection line of the window sill molding projected onto the door glass. In this case, in step S13, the area surrounded by the second pre-bending line c and the glass boundary above the second pre-bending line c is defined as the pre-bending zone.

[0049] Step S20: define the pre-bending amount; Figure 3 As shown, the specific process is as follows:

[0050] Step S21: The pre-bending area defined in step S10 is located at the maximum pre-bending point; the maximum pre-bending point is generally near the center of the upper edge curve of the glass, such as Figure 2 SS position shown;

[0051] Step S22: defining a maximum pre-bending amount required to be deformed at the maximum pre-bending position according to the glass profile data, wherein the glass profile data includes glass shape, structure and thickness. Depending on the specific glass profile data, the maximum pre-bending amount is generally within 3 mm (e.g., 1 mm, 2 mm, etc.);

[0052] Step S30: construct the glass pre-bending profile according to the pre-bending area and pre-bending amount data; in a preferred embodiment, the pre-bending amount at the first pre-bending line or the second pre-bending line is usually 0, and the deformation at the maximum pre-bending amount is the maximum pre-bending amount (0-3mm) to make the profile uniformly gradient. In a specific embodiment, the process is implemented with the help of Catia software, and a free surface transformation command can be used, or several constraint lines can be made using splines, and the constraint lines can be connected and filled, etc.

[0053] Step S40: Optimizing the pre-bent profile of the glass according to the glass forming parameters. In a preferred embodiment, in this step, it is necessary to analyze the curvature of the pre-bent profile of the glass to ensure a uniform curvature transition, and optimize the pre-bent profile according to the manufacturability of the glass to ensure that the pre-bent profile of the glass can be realized in actual manufacturing.

[0054] Embodiment 2:

[0055] The basic principle of this embodiment is the same as that of the first embodiment, except that the door glass used in this embodiment has a glass profile structure different from that of the first embodiment, and the method of defining the pre-bending area is different from the specific process of the first embodiment, mainly in terms of the specific implementation process of step S10 and step S20. Figure 5 Provide explanation.

[0056] The implementation process of step S10 in this embodiment is as follows:

[0057] Step S11: confirming the pre-bending zone definition model according to the glass shape;

[0058] When the pre-bending zone model confirmed in step S11 is a first type of model, step S12a is executed: according to the pre-bending zone definition model confirmed in step S11, the upper edge curve of the glass vertex is located, and the first pre-bending line is generated according to the acquired vertex and upper edge curve; Figure 5As shown, locate the first vertex A', the second vertex B' and the third vertex C of the door glass and the upper edge curve A'CB' from the first vertex A' through the third vertex C to the second vertex B'; take the angle bisector of ∠A'CB', intercept CD on the angle bisector, let the length of CD = the length of CB', and get point D. Make a three-point circle through the three points A', D, and B', and project the circle on the glass surface to form a curve A'DB', which is the first pre-bend line b of the door glass;

[0059] Step S13: Define the pre-bending area according to the parameters including the first pre-bending line and the glass boundary line. Figure 5 When the edges A'F' and B'E' are located) are constrained by the window track and basically have no movement or a small amount of movement along the vehicle side direction, the area surrounded by the first pre-bending line b and the glass boundary above the first pre-bending line b is defined as the pre-bending area.

[0060] When the pre-bending zone definition model confirmed in step S11 is a second type of model, step S12b is executed: locate the projection line of the window sill molding projected onto the door glass according to the pre-bending zone definition model, and generate a second pre-bending line according to the projection line. For example, if the window guide rail cannot provide sufficient restraint force on the side of the glass, especially for the door glass of a frameless door, the second pre-bending line c is generated according to the projection line of the window sill molding projected onto the door glass. In this case, the area surrounded by the second pre-bending line c and the glass boundary above the second pre-bending line c is defined as the pre-bending zone in step S13.

[0061] The specific process of step S20 in this embodiment is as follows:

[0062] Step S21: The pre-bending area defined in step S10 locates the maximum pre-bending point; the maximum pre-bending point is generally near the center of the upper edge curve of the glass slightly offset from point C, such as Figure 5 The S'-S' position shown;

[0063] Step S22: defining the maximum pre-bending amount required to be deformed at the maximum pre-bending position according to the glass profile data, wherein the glass profile data includes the glass shape, structure and thickness. Depending on the specific glass profile data, the maximum pre-bending amount is generally within 3 mm (e.g., 1 mm, 2 mm, etc.), such as Figure 3 shown.

[0064] In other embodiments, the first pre-bending line and the second pre-bending line may also be determined in other ways, but are usually defined near a, b, and c. Alternatively, the above method may be referred to and defined in combination with actual deformation conditions of door glasses of different vehicle models.

[0065] In some embodiments, when secondary pre-bending is required, the entire profile pre-bending process is usually completed according to the second type of model, and the glass profile data formed after the initial pre-bending is input into the system, and the system enters step S10 to complete the secondary pre-bending profile design according to the first type of model, and executes subsequent steps to achieve pre-bending of the door glass profile of vehicles with special needs for secondary pre-bending.

[0066] Embodiment 3:

[0067] The second aspect of the present invention is to provide a simulation system for pre-bending of vehicle door glass. Figure 6 As shown, the system has:

[0068] A data acquisition module, used to collect glass surface data, wherein the glass surface data includes glass shape, structure, thickness and boundary size data;

[0069] A model matching module, used for matching the pre-bending zone definition model according to the glass shape. Preferably, the model matching module stores the pre-bending zone definition parameters and corresponding definition algorithms preset according to the door glass shapes and structures of different vehicle models;

[0070] A pre-bending zone definition module, used to define the pre-bending zone according to the glass profile data, preferably, the pre-bending zone is defined by inputting corresponding parameters according to the pre-bending zone definition model matched by the model matching module;

[0071] A pre-bending amount definition module is used to define the maximum pre-bending position and the maximum pre-bending amount in the designated pre-bending area;

[0072] A glass pre-bending profile construction module is used to construct a glass pre-bending profile according to glass profile data, pre-bending area and maximum pre-bending amount;

[0073] The verification and optimization module is used to analyze the curvature of the glass pre-bent profile formed by the glass pre-bent profile construction module, and to optimize the pre-bent profile according to the manufacturability of the glass to generate the optimally designed glass pre-bent profile.

[0074] The third aspect of the present invention is to provide a simulation device for pre-bending of vehicle door glass, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and is characterized in that the processor implements the aforementioned method for designing the pre-bending profile of vehicle door glass when executing the computer program.

[0075] A fourth aspect of the present invention is to provide a computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the method for designing a pre-bent profile of a vehicle door glass of Embodiment 1 and Embodiment 2.

[0076] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention. The dimensions described in the drawings and embodiments are not related to the specific objects and are not used to limit the protection scope of the present invention. The dimensions of the objects can be selected and changed according to actual needs.

Claims

1. A method for designing a pre-bent profile of a vehicle door glass, comprising: Step S10: defining a pre-bending area according to glass profile data; Step S20: defining the pre-bending amount; Step S30: constructing a glass pre-bending profile according to the pre-bending area and pre-bending amount data; Step S40: Optimizing the glass pre-bent profile according to the glass forming parameters.

2. A method for designing a pre-bent profile of a vehicle door glass according to claim 1, characterized in that: Defining the pre-bending area in step S10 includes the following steps: Step S11: confirming the pre-bending area definition model according to the glass shape and window constraints; Step S12a: when the pre-bending area definition model confirmed in step S11 is a first type of model, locating the glass vertex and upper edge curve according to the pre-bending area definition model, and generating a first pre-bending line according to the vertex and the upper edge curve; Step S12b: when the pre-bending area definition model confirmed in step S11 is a second type of model, locating a projection line of the window sill molding projected onto the door glass according to the pre-bending area definition model, and generating a second pre-bending line according to the projection line; Step S13: defining a pre-bending area according to parameters including the first pre-bending line or the second pre-bending line, and a glass boundary line.

3. A method for designing a pre-bent profile of a vehicle door glass according to claim 2, characterized in that: Defining the pre-bending amount in step S20 includes the following steps: Step S21: locating the maximum pre-bending position in the pre-bending area defined in step S10; Step S22: defining the maximum pre-bending amount required for deformation at the maximum pre-bending position according to the glass profile data, wherein the glass profile data includes the glass shape, structure and thickness.

4. A method for designing a pre-bent profile of a vehicle door glass according to claim 3, characterized in that: When constructing the glass pre-bending profile in step S30, the pre-bending amount at the first pre-bending line or the second pre-bending line is 0, and the deformation amount at the maximum pre-bending point is the maximum pre-bending amount to make the profile uniformly and gradually changed.

5. A method for designing a pre-bent profile of a vehicle door glass according to claim 4, characterized in that: Optimizing the pre-bent profile of the glass in step S40 includes analyzing the profile curvature of the pre-bent profile of the glass formed after pre-bending in step S30, and optimizing the pre-bent profile according to the manufacturing feasibility of the glass.

6. A simulation system for pre-bending of door glass, comprising: A data acquisition module, used to collect glass surface data, wherein the glass surface data includes glass shape, structure, thickness and boundary size data; Model matching module, used to match the pre-bending area definition model according to the glass shape; A pre-bending area definition module is used to define the pre-bending area according to glass profile data; The pre-bending amount definition module is used to define the maximum pre-bending position and the maximum pre-bending amount; A glass pre-bending profile construction module is used to construct a glass pre-bending profile according to glass profile data, pre-bending area and maximum pre-bending amount; The verification and optimization module is used to analyze the curvature of the glass pre-bent profile formed by the glass pre-bent profile construction module, and to optimize the pre-bent profile according to the glass forming parameters to generate the optimally designed glass pre-bent profile.

7. A simulation device for pre-bending of vehicle door glass, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method for designing a pre-bent profile of a vehicle door glass as described in any one of claims 1 to 5 is implemented.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for designing a pre-bent profile of a vehicle door glass as claimed in any one of claims 1 to 5 is implemented.

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