Bonding method, rolling tool, coating guide tool, and vehicle

Abstract

The present application provides a bonding method, a rolling tool, a coating guide tool and a vehicle. The bonding method is used to bond a part to be bonded to a sheet metal part with a painted surface, and comprises: S100, coating a primer having an isocyanate group on the painted surface to be bonded of the sheet metal part; S200, bonding the part to be bonded to the painted surface to be bonded of the sheet metal part via an adhesive material. According to the bonding method of the present application, the bonding reliability is effectively improved. The rolling tool and the coating guide tool according to the present application can better assist the implementation of the aforementioned bonding method, improve the bonding reliability or process efficiency. The vehicle applying the aforementioned bonding method therefore also has better bonding reliability between the sheet metal part and the part to be bonded, thereby improving the vehicle quality and user comfort, and enhancing user satisfaction.

Description

Technical Field

[0001] The present application relates to the field of process processing, and more specifically, to a method for bonding a part to be bonded to a sheet metal part with a paint surface, and a tooling for assisting in implementing the bonding method. Background Art

[0002] As vehicles mature, the industry is shifting towards optimizing them across multiple R&D areas, aiming to further enhance performance, comfort, and environmental friendliness. One such area of focus is vehicle sealing.

[0003] As an integral part of vehicle sealing performance, the seal between the door and the vehicle's main door frame is essential. Currently, sealing strips are typically bonded to the door to provide a seal between the two. More specifically, some manufacturers directly use pressure-sensitive adhesives to bond the sealing strips to the door sheet metal, while others use pressure-sensitive adhesives combined with adhesion promoters such as SIKA205 to bond the sealing strips to the door sheet metal. These bonding processes primarily achieve bonding through van der Waals forces and hydrogen bonds between molecules. However, due to the difficulty in adhering to smooth painted sheet metal, debonding of door sealing strips is a common phenomenon among major vehicle manufacturers. This affects the sealing quality and appearance of the entire vehicle and reduces the customer experience and comfort. Summary of the Invention

[0004] In view of this, the present application provides a bonding method, a rolling tool, a coating guide tool and a vehicle, which can solve or at least alleviate one or more of the above-mentioned and other problems existing in the prior art, or can provide an alternative technical solution for the prior art.

[0005] To achieve at least one purpose of the present application, according to one aspect of the present application, a bonding method is provided for bonding a part to be bonded to a sheet metal part having a painted surface, comprising: S100, coating a primer having an isocyanate group on the painted surface to be bonded of the sheet metal part; S200, bonding the part to be bonded to the painted surface to be bonded of the sheet metal part via an adhesive material.

[0006] In addition to one or more of the above features, or as an alternative, in another embodiment, S200 includes: applying adhesive to the surface to be bonded of the part to be bonded, and then bonding the part to be bonded to the painted surface to be bonded of the sheet metal part.

[0007] In addition to one or more of the above features, or as an alternative, in another embodiment, S200 includes: applying adhesive to the paint surface of the sheet metal to be bonded, and then bonding the part to be bonded to the paint surface of the sheet metal to be bonded.

[0008] In addition to one or more of the above features, or as an alternative, in another embodiment, S200 includes: providing an adhesive tape on the surface to be bonded of the part to be bonded, and then bonding the part to be bonded to the painted surface to be bonded of the sheet metal part.

[0009] In addition to one or more of the above features, or as an alternative, in another embodiment, a chemical reaction occurs between the paint surface of the sheet metal to be bonded and the primer having an isocyanate group to form a chemical bond; and a chemical reaction occurs between the bonding material and the primer having an isocyanate group to form a chemical bond.

[0010] In addition to one or more of the above features, or as an alternative, in another embodiment, the paint surface of the sheet metal to be bonded has a hydroxyl group that chemically reacts with the isocyanate group of the primer; and the bonding material has a hydroxyl group that chemically reacts with the isocyanate group of the primer.

[0011] In addition to one or more of the above features, or as an alternative, in another embodiment, the bonding material is a pressure-sensitive adhesive; S200 also includes: bonding the part to be bonded to the painted surface to be bonded of the sheet metal part via the pressure-sensitive adhesive, and squeezing the joint position between the rubber strip and the painted surface to be bonded of the sheet metal part.

[0012] To achieve at least one purpose of the present application, according to another aspect of the present application, a vehicle is provided, comprising: a part to be bonded and a sheet metal part with a painted surface; wherein the part to be bonded and the sheet metal part with a painted surface are bonded by the bonding method as described above.

[0013] In addition to one or more of the above features, or as an alternative, in another embodiment, the sheet metal part is a vehicle door, the part to be bonded is a rubber strip, and the rubber strip is bonded to the vehicle door at the joint surface between the vehicle door and the body of the vehicle.

[0014] To achieve at least one purpose of the present application, according to another aspect of the present application, a rolling tool for bonding is provided, which includes: a hand-held part; a driving part, which is arranged in the hand-held part and is used to provide power; and a rolling head, which is detachably mounted on the hand-held part and rotates in a controlled manner; wherein the rolling head has a rolling section, and the rolling section has an arc surface profile that tapers axially from the middle toward the two ends.

[0015] In order to achieve at least one purpose of the present application, according to another aspect of the present application, a coating guide tool is provided, which is used for the bonding method as described above, wherein the coating guide tool includes: a tool body; a guide groove, which is opened on the tool body and corresponds to the paint surface to be bonded of the sheet metal part, so as to guide the primer and / or adhesive material to be applied to the paint surface to be bonded of the sheet metal part along a preset trajectory.

[0016] According to the bonding method of the present application, by first applying a primer containing isocyanate groups between the paint surface of the sheet metal to be bonded and the bonding material, a chemical reaction can occur between the two to produce a stronger adsorption force, thereby preventing debonding at the bonding location due to high temperature and lateral force of the vehicle body, thereby improving bonding reliability. The rolling tool and coating guide tool according to the present application can better assist in the implementation of the aforementioned bonding method, improving bonding reliability or process efficiency. Vehicles using the aforementioned bonding method therefore also have better bonding reliability between the sheet metal and the parts to be bonded, thereby improving vehicle quality and user comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flow chart of an embodiment of the bonding method of the present application.

[0018] Figure 2 It is a schematic diagram of an embodiment of a rolling head of a rolling tool of the present application.

[0019] Figure 3 Schematic diagram of an embodiment of the rolling tool of the present application.

[0020] Figure 4 It is a schematic diagram of performing a rolling operation using the rolling tool of the present application.

[0021] Figure 5 Schematic diagram of a coating guide tool according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present application will be described in detail below with reference to the exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided herein to make the disclosure of the present application more complete and detailed and to fully convey the concepts of the present application to those skilled in the art.

[0023] In addition, for any single technical feature described or implied in the embodiments mentioned in this document, or any single technical feature shown or implied in the drawings, this application still allows for continued arbitrary combination or deletion between these technical features (or their equivalents) without any technical obstacles, thereby obtaining more other embodiments of the present application that may not be directly mentioned in this document.

[0024] The following will be combined Figure 1 To describe an embodiment of the bonding method of the present application, which is used to bond a rubber part to a sheet metal part with a paint surface. In summary, the bonding method includes a primer step and a bonding step. First, the primer step S100 is performed to apply a primer having an isocyanate group on the paint surface of the sheet metal part to be bonded; after the primer dries, the bonding step S200 is performed to bond the rubber part to the paint surface of the sheet metal part to be bonded via the bonding material. In this process, the isocyanate group in the primer chemically reacts with the paint surface of the sheet metal part to be bonded and the bonding material, respectively, thereby generating a stronger adsorption force, avoiding debonding at the bonding position due to high temperature and lateral force of the vehicle body, and improving bonding reliability.

[0025] Specifically, the chemical reactions between the materials in the aforementioned process may include: a chemical reaction and formation of a chemical bond between the paint surface of the sheet metal to be bonded and the primer having an isocyanate group; and a chemical reaction and formation of a chemical bond between the adhesive material and the primer having an isocyanate group. Compared to the van der Waals force and hydrogen bond between molecules, this chemical bond can generate a greater force, thereby ensuring a more reliable bonding of the materials and avoiding debonding due to external force or high temperature. As one example, the generated chemical bond can be derived from the chemical reaction between the hydroxyl groups contained in the paint surface of the sheet metal to be bonded and the isocyanate groups of the primer, and can also be derived from the chemical reaction between the hydroxyl groups contained in the adhesive material and the isocyanate groups of the primer.

[0026] The details of each step of the bonding method and their interrelationships will be described below. In addition, in order to further improve reliability, practicality, economy or for other improvement considerations, other steps may be added, which are also exemplarily described below.

[0027] For example, as a detailed example of the bonding step, S200 includes applying adhesive to the surface of the rubber component to be bonded, followed by bonding the rubber component to the painted surface of the sheet metal component to be bonded. Alternatively, S200 includes applying adhesive to the painted surface of the sheet metal component to be bonded, followed by bonding the rubber component to the painted surface of the sheet metal component to be bonded. As can be seen, there are many options for applying the adhesive, as long as the adhesive is applied after the primer is applied.

[0028] For another example, as another detailed example of the bonding step, S200 includes: providing a bonding tape on the surface of the rubber part to be bonded, and then bonding the rubber part to the painted surface of the sheet metal part to be bonded.

[0029] It can be seen that bonding materials can be used in various forms, among which bonding tape is a more common and easy to implement bonding process.

[0030] For example, when the adhesive material is a pressure-sensitive adhesive, S200 further includes: bonding the rubber piece to the painted surface of the sheet metal component to be bonded via the pressure-sensitive adhesive, and compressing the joint between the rubber strip and the painted surface of the sheet metal component to be bonded. This applies sufficient pressure to the rubber strip and the pressure-sensitive adhesive at the joint to ensure that the pressure-sensitive adhesive is bonded in place.

[0031] While the aforementioned bonding methods all utilize rubber components as the bonding target for painted sheet metal parts, the present invention focuses on how to bond various components to painted sheet metal parts, which are typically difficult to bond securely. Therefore, with the guidance of this invention, those skilled in the art will be able to apply this bonding method to bond other non-rubber components to painted sheet metal parts, thereby improving the bonding effect.

[0032] In addition, in order to facilitate the execution of the aforementioned bonding method embodiments, a partial tooling embodiment may also be provided.

[0033] For example, see Figures 2 to 4 , which shows a rolling tool for bonding. The tool includes a handheld part, a driving part and a rolling head. Among them, the driving part is arranged in the handheld part and is used to provide power; and the rolling head can be detachably mounted on the handheld part and rotates in a controlled manner. The aforementioned components can also directly use some of the rolling head electric tools currently available on the market. However, the key structure that provides improved rolling and bonding effects is that the rolling head has a rolling section, and the rolling section has an arc profile that tapers axially from the middle toward the two ends. Under this arrangement, the middle part of the rolling section is relatively thick, and the ends are relatively thinner, so that during the driven rotational rolling process, sufficient pressure can be provided to the sealing rubber strip and the pressure-sensitive adhesive at the joint position to ensure that it fully fits the paint surface of the sheet metal and is bonded in place. More specifically, as Figure 4 As shown, the operator inserts an elliptical rolling head (a type of rolling section) between the foam tube and the dense colloid of the sealing rubber strip, applying rolling pressure directly to the dense colloid. This rolling pressure extends from the center outward, facilitating the removal of air between the sealing rubber strip and the painted surface of the sheet metal component, ensuring proper adhesion. Finally, the isocyanate-containing primer secures the bond, preventing the sealing rubber strip from peeling due to high temperatures and lateral forces from the vehicle body.

[0034] For example, see Figure 5 , which shows a coating guide tool. The tool comprises a tool body and a guide groove defined therein. The guide groove corresponds to the painted surface of the sheet metal component to be bonded. With this arrangement, when the tool body is positioned, the guide groove can be used to accurately guide the primer and / or adhesive along a predetermined path to the painted surface of the sheet metal component to be bonded, thereby improving the process.

[0035] As one example application of the aforementioned method, a vehicle may include a rubber component and a painted sheet metal component. More specifically, the sheet metal component may be a door, and the rubber component may be a rubber sealing strip bonded to the door at the interface between the door and the vehicle's main body. In this case, bonding the two components using any of the aforementioned bonding methods or combinations thereof can ensure greater bonding reliability between the sheet metal component and the rubber component, thereby improving vehicle quality and user comfort.

[0036] The above examples primarily illustrate bonding methods, rolling tools, coating guide tools, and vehicles. Although only some embodiments of the present application have been described, those skilled in the art will appreciate that the present application may be implemented in many other forms without departing from its spirit and scope. Therefore, the examples and embodiments presented are to be considered illustrative rather than restrictive, and the present application may encompass various modifications and substitutions without departing from the spirit and scope of the present application as defined by the appended claims.

Claims

1. A bonding method for bonding a part to be bonded to a sheet metal part with a painted surface, characterized in that: include: S100, coating a primer having an isocyanate group on the paint surface to be bonded of the sheet metal part; S200, bonding the part to be bonded to the painted surface to be bonded of the sheet metal part via bonding material, Wherein, a chemical reaction occurs between the paint surface of the sheet metal to be bonded and the primer having isocyanate groups to form a chemical bond; and a chemical reaction occurs between the adhesive material and the primer having isocyanate groups to form a chemical bond.

2. The bonding method according to claim 1, wherein: S200 includes: applying adhesive to the surface to be bonded of the part to be bonded, and then bonding the part to be bonded to the painted surface to be bonded of the sheet metal part.

3. The bonding method according to claim 1, wherein: S200 includes: applying adhesive to the paint surface of the sheet metal component to be bonded, and then bonding the part to be bonded to the paint surface of the sheet metal component to be bonded.

4. The bonding method according to claim 1, wherein: S200 includes: providing an adhesive tape on the surface to be bonded of the part to be bonded, and then bonding the part to be bonded to the painted surface to be bonded of the sheet metal part.

5. The bonding method according to claim 1, wherein: The paint surface of the sheet metal part to be bonded has a hydroxyl group that chemically reacts with the isocyanate group of the primer; and the bonding material has a hydroxyl group that chemically reacts with the isocyanate group of the primer.

6. The bonding method according to claim 1, wherein: The bonding material is a pressure-sensitive adhesive; S200 further includes: bonding the part to be bonded to the painted surface to be bonded of the sheet metal part via the pressure-sensitive adhesive, and squeezing the joint between the part to be bonded and the painted surface to be bonded of the sheet metal part.

7. A vehicle, characterized in that: include: A part to be bonded and a sheet metal part with a painted surface; wherein the part to be bonded and the sheet metal part with a painted surface are bonded by the bonding method according to any one of claims 1 to 6.

8. The vehicle according to claim 7, characterized in that The sheet metal part is a vehicle door, the part to be bonded is a rubber strip, and the rubber strip is bonded to the vehicle door at a joint surface between the vehicle door and a main body of the vehicle.

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