Vehicle door assembly and preparation method thereof

Abstract

The invention provides a vehicle door assembly and a preparation method thereof, the vehicle door assembly comprises a vehicle door inner plate and a window frame structure, and the window frame structure is fixedly connected with the vehicle door inner plate; the automobile door inner plate and the window frame structure are made of steel materials, at least part of the connecting position of the automobile door inner plate and the window frame structure is provided with a first sealing structure formed through the laser welding technology, and the at least part of the connecting position is the position needing to be sealed. According to the invention, low cost, low pollution and high vehicle door rigidity can be ensured at the same time.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a vehicle door assembly and a preparation method thereof. Background Art

[0002] A vehicle door assembly refers to a structure that enables a user to enter and exit a vehicle and that can close the vehicle door opening.

[0003] In the related technology, the door assembly can include aluminum doors and steel doors. Aluminum doors do not require production links such as electrophoresis and painting, but have the disadvantages of high material cost, low rigidity and poor modal analysis results. Although the material cost of steel doors is low, they require a full set of coating production lines including gluing, electrophoresis, and painting to produce, resulting in large fixed investment, difficulty in factory construction review, and serious pollution.

[0004] For vehicles with all-aluminum bodies, since the bodies do not require a paint production line, they often face a dilemma when choosing the material for the doors. Summary of the invention

[0005] In view of this, the present disclosure provides a vehicle door assembly and a method for preparing the same, which can simultaneously ensure low cost, low pollution and high door rigidity.

[0006] Specifically, the following technical solutions are included:

[0007] In a first aspect, the present disclosure provides a vehicle door assembly, comprising a vehicle door inner panel and a window frame structure, wherein the window frame structure is fixedly connected to the vehicle door inner panel;

[0008] The door inner panel and the window frame structure are made of steel, and at least part of the connection position between the door inner panel and the window frame structure has a first sealing structure formed by a laser welding process, and the at least part of the connection position is a position that needs to be sealed.

[0009] Optionally, the window frame structure includes a first extension section and a second extension section;

[0010] One end of the second extension section is connected to the door inner panel, and the other end of the second extension section extends away from the door inner panel and is connected to one end of the first extension section;

[0011] The first extension section transitionally extends from the other end of the second extension section until it connects with the vehicle door inner panel.

[0012] Optionally, the window frame structure is made of a plate-like material through a rolling process.

[0013] Optionally, at least one of the first extension segment and the second extension segment includes a first portion, a second portion and a middle portion, and the middle portion is connected between the first portion and the second portion;

[0014] The first portion, the second portion, and the middle portion define a first mounting slot located on one side of the first extension segment and a second mounting slot located on the other side of the first extension segment.

[0015] Optionally, the middle portion includes a first sub-board, a second sub-board and a third sub-board;

[0016] The first sub-plate includes a first flat plate portion and a first free end, wherein the first flat plate portion is connected to the first portion;

[0017] The second sub-plate includes a second flat plate portion and a second free end, the second flat plate portion extending to connect with the second portion;

[0018] The third sub-plate is stacked and attached to the second flat plate portion and the first flat plate portion, and two ends of the third sub-plate extend to connect with the first portion and the second portion respectively;

[0019] The first free end is staggered with the second free end, and a gap between the first free end and the second flat plate portion is filled with a second sealing structure formed by a laser welding process.

[0020] Optionally, a welding width between the first free end and the second flat plate portion is in the range of 1-2 mm.

[0021] Optionally, the outer surface of the window frame structure has an electrophoretic paint layer formed by an electrophoretic process.

[0022] Optionally, the window frame structure and the door inner panel are welded together using a resistance welding process.

[0023] On the other hand, the present disclosure provides a method for preparing a vehicle door assembly, wherein the vehicle door assembly comprises a vehicle door inner panel and a window frame structure, wherein the window frame structure is fixedly connected to the vehicle door inner panel, and the vehicle door inner panel and the window frame structure are made of steel;

[0024] The method comprises:

[0025] A laser welding process is used to form a first sealing structure at at least a portion of the connection position between the door inner panel and the window frame structure, and the at least a portion of the connection position is a position that needs to be sealed.

[0026] Optionally, also include:

[0027] An electrophoretic paint layer is formed on the outer surface of the window frame structure by means of an electrophoretic process.

[0028] The disclosed embodiment provides a vehicle door assembly and a method for manufacturing the same. The door inner panel and the window frame structure of the vehicle door assembly are made of steel, and thus the vehicle door assembly has the advantages of low material cost and high rigidity. At the same time, the position between the vehicle door inner panel and the window frame structure that needs to be sealed has a first sealing structure formed by a laser welding process, and thus the vehicle door inner panel and the window frame structure do not need to be sealed by a traditional gluing process, which can effectively reduce pollution and effectively reduce the fixed cost of setting up a production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A partial structural exploded schematic diagram of a vehicle door assembly provided by an embodiment of the present disclosure;

[0031] Figure 2 A partial structural schematic diagram of a vehicle door assembly provided in an embodiment of the present disclosure;

[0032] Figure 3 for Figure 2 An enlarged schematic diagram of the structure shown at box C;

[0033] Figure 4 for Figure 2 A cross-sectional view of the structure shown at line AA;

[0034] Figure 5 for Figure 2 A portion of a cross-sectional view of the structure shown at line BB;

[0035] Figure 6 A flow chart of a method for preparing a vehicle door assembly provided in an embodiment of the present disclosure;

[0036] Figure 7 A flow chart of another method for preparing a vehicle door assembly provided in an embodiment of the present disclosure.

[0037] The reference numerals in the figures represent respectively:

[0038] 1-Inner door panel;

[0039] 2-Window frame structure;

[0040] 21- first extension section;

[0041] 22- second extension section;

[0042] x1-part 1;

[0043] x2-second part;

[0044] x3 - middle part;

[0045] x31-first sub-board; x311-first flat plate portion; x312-first free end;

[0046] x32-second sub-board; x321-second flat plate portion; x322-second free end;

[0047] x33-third daughter board;

[0048] y1-first mounting slot;

[0049] y2-second mounting slot;

[0050] 3-first sealing structure; 4-second sealing structure.

[0051] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0053] The directional nouns involved in the embodiments of the present disclosure, such as "upper", "lower", "side", etc., are generally based on the relative directional relationship between the structures when the components are usually arranged in the vehicle, and these directional nouns are used only to more clearly describe the relationship between the structures, and are not intended to describe the absolute directional. When the components are placed in different postures in the vehicle, the directional may change, for example, "upper" and "lower" may be interchangeable.

[0054] Unless otherwise defined, all technical terms used in the embodiments of the present disclosure have the same meanings as commonly understood by those of ordinary skill in the art.

[0055] In order to make the technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0056] In a first aspect, an embodiment of the present disclosure provides a vehicle door assembly.

[0057] refer to Figure 1-3 , the vehicle door assembly of the embodiment of the present disclosure comprises a vehicle door inner panel 1 and a window frame structure 2, and the window frame structure 2 is fixedly connected to the vehicle door inner panel 1;

[0058] The door inner panel 1 and the window frame structure 2 are made of steel, and at least part of the connection position between the door inner panel 1 and the window frame structure 2 has a first sealing structure 3 formed by a laser welding process, and at least part of the connection position is a position that needs to be sealed.

[0059] In the disclosed embodiment, the door inner panel and the window frame structure of the door assembly are both made of steel, so that the overall rigidity of the door assembly is high, the manufacturing cost is low, and the door closing quality is better. At the same time, the positions between the door inner panel and the window frame structure that need to be sealed are all formed by a laser welding process to form a first sealing structure to achieve sealing of these positions. In this way, there is no need for an additional glue coating process to seal between the door inner panel and the window frame structure, which can effectively reduce pollution and significantly reduce the fixed cost corresponding to setting up a complete set of coating production lines.

[0060] In some embodiments, reference Figure 2 , the window frame structure 2 includes a first extension section 21 and a second extension section 22;

[0061] One end of the second extension section 22 is connected to the door inner panel 1, and the other end of the second extension section 22 extends away from the door inner panel 1 and is connected to one end of the first extension section 21;

[0062] The first extension section 21 transitionally extends from the other end of the second extension section 22 until it connects with the door inner panel 1 .

[0063] In the disclosed embodiment, the window frame structure includes at least two sections, and the two sections cooperate to frame the space for setting the window glass. The two sections can have similar structures or different structures to meet the rigidity requirements of the window frame at different locations. For the second extension section, it can correspond to the position of the B-pillar in an actual vehicle, which can help improve the vehicle's ability to resist impact. For the first extension section, its shape can be designed according to requirements to meet different window shape design requirements.

[0064] Optional, reference Figure 3 The at least part of the connection position mentioned above may include the connection position between one end of the second extension section of the window frame structure close to the door inner panel and the door inner panel. The position may include one or more positions according to actual conditions.

[0065] Optionally, the window frame structure 2 is made of a plate-like material through a rolling process.

[0066] In other words, the window frame structure as a whole can actually be made of a whole sheet of plate, but different shapes are rolled out of different parts by means of rolling technology. In this way, the integrity of the window frame structure can be improved, the number of parts can be reduced, and the overall strength and corrosion resistance of the window frame structure can be improved.

[0067] In some embodiments, reference Figure 4-5 , at least one of the first extension section 21 and the second extension section 22 includes a first portion x1, a second portion x2 and a middle portion x3, and the middle portion x3 is connected between the first portion x1 and the second portion x2;

[0068] The first portion x1 , the second portion x2 , and the middle portion x3 define a first mounting groove y1 located on one side of the first extension section 21 and a second mounting groove y2 located on the other side of the first extension section 21 .

[0069] Based on the above arrangement, the window frame structure can be installed in coordination with other structures at the vehicle door by means of the first installation groove and the second installation groove. For example, for the first extension section, the first installation groove can be coordinated with the structure at the top of the vehicle door, while the second installation groove is coordinated with the vehicle window glass; for the second extension section, the first installation groove can be coordinated with the structure at the side of the vehicle door, while the second installation groove is coordinated with the vehicle window glass, so as to realize the coordinated installation of the vehicle door assembly with other structures and improve the airtightness of the vehicle.

[0070] The aforementioned first part and second part can correspond to the vehicle exterior structure and vehicle interior structure of the window frame structure respectively, and the two can be coordinated with other structures (such as decorative parts or seals, etc.) according to vehicle design requirements, so that the window frame structure can achieve corresponding functions or corresponding appearances on both sides inside and outside the vehicle.

[0071] Optional, reference Figure 4-5 , the middle part x3 includes a first sub-board x31, a second sub-board x32 and a third sub-board x33;

[0072] The first sub-plate x31 includes a first flat plate portion x311 and a first free end x312, and the first flat plate portion x311 is connected to the first portion x1;

[0073] The second sub-plate x32 includes a second flat plate portion x321 and a second free end x322, and the second flat plate portion x321 extends to connect with the second portion x2;

[0074] The third sub-plate x33 is stacked and attached to the second flat plate portion x321 and the first flat plate portion x311, and two ends of the third sub-plate x33 extend to connect with the first portion x1 and the second portion x2 respectively;

[0075] The first free end x312 is staggered with the second free end x322, and a gap between the first free end x312 and the second flat plate portion x321 is filled with a second sealing structure 4 formed by a laser welding process.

[0076] Based on the above arrangement, the middle part is actually obtained by stacking a plurality of sub-plates, and can have a relatively high strength as a whole. The first sub-plate has a first free end, and the second sub-plate has a second free end. The two free ends actually correspond to the two opposite ends of a whole plate used to form the window frame structure, that is, the first part, the middle part or the second part are all obtained by shaping a part of the whole plate. The two free ends are staggered, and the gap between the first free end and the second flat plate portion of the second sub-plate is sealed by the second sealing structure, so that the window frame structure as a whole is formed into a cylindrical structure, and the side wall of the cylindrical structure is completely formed into one piece without any gap. It should be noted that if the window frame structure is understood as a cylindrical structure, the openings on both sides of the cylindrical structure actually correspond to the positions where the window frame structure is connected to the inner panel of the vehicle door, and these positions can be sealed with the help of the first sealing structure, and then the window frame structure forms an integral sealing structure. In this way, there is no need to perform traditional glue sealing work, which can effectively reduce pollution and reduce costs.

[0077] in addition, Figure 4-5 Cross-sectional views at different positions of the window frame are given. The above description only describes the common features of the two, but in fact there may be differences in the cross-sectional views at the two positions. Figure 5 The cross section at line BB shown in the figure is actually only a partial view, and those skilled in the art can design the unshown parts according to their needs. In addition, the drawings only show the cross-sectional views at lines AA and BB, and other positions may have similar cross-sectional views, which will not be described in detail in this disclosure.

[0078] Optionally, the welding width between the first free end x312 and the second flat plate portion x321 is within the range of 1-2 mm. In this way, it can be fully ensured that the gap between the first free end and the second flat plate portion is completely sealed, thereby improving the sealing effect. Optionally, the welding width can be 1.5 mm, with a tolerance within the range of 0-0.15 mm.

[0079] In some embodiments, the outer surface of the window frame structure has an electrophoretic paint layer formed by an electrophoretic process.

[0080] In this embodiment, in addition to the aforementioned sealing treatment, an electrophoretic paint layer is formed on the outer surface of the window frame structure by means of an electrophoretic process, which can achieve excellent anti-corrosion performance, prevent the window frame structure from rusting, achieve excellent appearance quality, and increase the service life of the door assembly. In addition, the traditional painting process can be avoided, thereby further avoiding the cost caused by the painting process.

[0081] Optionally, the electrophoretic paint layer can be directly formed on the overall outer surface of the window frame structure and the door inner panel, so that the corrosion resistance of the window frame structure and the door inner panel as a whole can be improved, thereby achieving the overall corrosion resistance performance requirements of the door assembly.

[0082] In some embodiments, the window frame structure 2 and the door inner panel 1 are welded together using a resistance welding process.

[0083] In this embodiment, the window frame structure and the door inner panel are first welded and fixed by a resistance welding process, and then the gap is filled and sealed by a laser welding process, which can effectively improve the preparation efficiency of the door assembly.

[0084] In some embodiments, the vehicle door assembly further includes a vehicle door outer panel, which is opposite to the vehicle door inner panel and welded together to form a split vehicle door assembly.

[0085] Optionally, the door inner panel is formed by a steel plate through a stamping process. This method has high preparation efficiency and high forming accuracy, which is conducive to improving the overall preparation efficiency of the door assembly and increasing the service life of the door assembly.

[0086] It should be noted that the door assembly of the embodiment of the present disclosure can be applicable to the front door or the rear door. When applied to doors in different positions, the shape of the window frame structure may be different, but the application principle is always similar. The present disclosure does not specifically limit the type of door applied.

[0087] In summary, the disclosed embodiment provides a vehicle door assembly, which uses a steel door inner panel and window frame structure, which can effectively improve the rigidity and impact resistance of the vehicle door assembly, ensure that the vehicle door assembly has a simple structure and high reliability, and reduce the material cost of the vehicle door assembly. At the same time, the positions of the window frame structure itself that need to be sealed and the connection positions between the window frame structure and the door inner panel that need to be sealed are formed with the help of laser welding technology to form corresponding gap filling and sealing structures, which can effectively ensure the sealing effect, improve the sealing efficiency, avoid the traditional glue coating process, effectively reduce pollution, and reduce the overall preparation process cost. In addition, an electrophoretic paint layer is formed on the outer surface of the window frame structure with the help of an electrophoretic process, which can avoid the traditional spray painting process, and can also ensure that the vehicle door assembly has excellent anti-corrosion performance and excellent appearance quality, improve the stability of vehicle use, and reduce after-sales problems caused by corrosion problems.

[0088] In a second aspect, an embodiment of the present disclosure provides a method for preparing a vehicle door assembly. The method can be used to prepare the vehicle door assembly as described above. The detailed features of the vehicle door assembly can refer to the aforementioned embodiment.

[0089] refer to Figure 6 , the method comprising:

[0090] Step 601: A first sealing structure 3 is formed at least partially at the connection position between the door inner panel 1 and the window frame structure 2 by using a laser welding process, and at least partially at the connection position is a position that needs to be sealed.

[0091] This step is performed after the door inner panel and the window frame structure are welded and fixed together, so as to seal the position that needs to be sealed.

[0092] The method of the disclosed embodiment can seal the position between the door inner panel and the window frame structure that needs to be sealed by means of the laser welding process. In this way, there is no need for an additional glue coating process to seal the door inner panel and the window frame structure, which can effectively reduce pollution and significantly reduce the fixed cost corresponding to setting up a complete coating production line.

[0093] In some embodiments, reference Figure 7 , the above method further comprises:

[0094] Step 602: Form a second sealing structure on the window frame structure using a laser welding process.

[0095] In this step, the second sealing structure is formed in the gap between the first free end and the second flat plate portion in the middle portion of at least one of the first extension section and the second extension section of the window frame structure. In this way, the positions of the window frame structure that need to be sealed are sealed by means of the laser welding process, which can avoid the traditional glue coating sealing process, thereby effectively reducing pollution.

[0096] In some embodiments, continue to refer to Figure 7 , the above method further comprises:

[0097] Step 603: forming an electrophoretic paint layer on the outer surface of the window frame structure by means of an electrophoretic process.

[0098] In this step, an electrophoretic paint layer is formed on the outer surface of the window frame structure, which can achieve excellent anti-corrosion performance, prevent the window frame structure from rusting, achieve excellent appearance quality, and increase the service life of the door assembly. In addition, the traditional painting process can be avoided, thereby further avoiding the cost caused by the painting process.

[0099] Optionally, the electrophoretic paint layer can be directly formed on the overall outer surface of the window frame structure and the door inner panel, so that the corrosion resistance of the window frame structure and the door inner panel as a whole can be improved, thereby achieving the overall corrosion resistance performance requirements of the door assembly.

[0100] In summary, the preparation method of the vehicle door assembly provided by the embodiment of the present disclosure can use the laser welding process to fill and seal the gaps at the positions where the window frame structure itself needs to be sealed and the connection positions between the window frame structure and the door inner panel that need to be sealed, which can effectively ensure the sealing effect, improve the sealing efficiency, and avoid the traditional gluing process, effectively reduce pollution, and reduce the overall preparation process cost. In addition, an electrophoretic paint layer is formed on the outer surface of the window frame structure by means of the electrophoretic process, which can avoid the traditional spray painting process, and can also ensure that the vehicle door assembly has excellent anti-corrosion performance and excellent appearance quality, improve the stability of vehicle use, and reduce after-sales problems caused by corrosion problems.

[0101] In the present disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

[0102] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only.

[0103] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A vehicle door assembly, characterized in that: It comprises a vehicle door inner panel (1) and a window frame structure (2), wherein the window frame structure (2) is fixedly connected to the vehicle door inner panel (1); The vehicle door inner panel (1) and the window frame structure (2) are made of steel, and at least part of the connection position between the vehicle door inner panel (1) and the window frame structure (2) has a first sealing structure (3) formed by a laser welding process, and the at least part of the connection position is a position that needs to be sealed.

2. The vehicle door assembly according to claim 1, characterized in that: The window frame structure (2) comprises a first extension section (21) and a second extension section (22); One end of the second extension section (22) is connected to the vehicle door inner panel (1), and the other end of the second extension section (22) extends in a direction away from the vehicle door inner panel (1) and is connected to one end of the first extension section (21); The first extension section (21) transitionally extends from the other end of the second extension section (22) until it connects with the vehicle door inner panel (1).

3. The vehicle door assembly according to claim 2, characterized in that: The window frame structure (2) is made of a plate-shaped material through a rolling process.

4. The vehicle door assembly according to claim 2, characterized in that: At least one of the first extension section (21) and the second extension section (22) comprises a first portion (x1), a second portion (x2) and a middle portion (x3), wherein the middle portion (x3) is connected between the first portion (x1) and the second portion (x2); The first part (x1), the second part (x2) and the middle part (x3) define a first mounting groove (y1) located on one side of the first extension section (21) and a second mounting groove (y2) located on the other side of the first extension section (21).

5. The vehicle door assembly according to claim 4, characterized in that: The middle part (x3) includes a first sub-board (x31), a second sub-board (x32) and a third sub-board (x33); The first sub-plate (x31) comprises a first flat plate portion (x311) and a first free end (x312), wherein the first flat plate portion (x311) is connected to the first portion (x1); The second sub-plate (x32) comprises a second flat plate portion (x321) and a second free end (x322), wherein the second flat plate portion (x321) extends to connect with the second portion (x2); The third sub-plate (x33) is stacked and attached to the second flat plate portion (x321) and the first flat plate portion (x311), and two ends of the third sub-plate (x33) extend to connect with the first portion (x1) and the second portion (x2) respectively; The first free end (x312) and the second free end (x322) are staggered, and the gap between the first free end (x312) and the second flat plate portion (x321) is filled with a second sealing structure (4) formed by a laser welding process.

6. The vehicle door assembly according to claim 5, characterized in that: The welding width between the first free end (x312) and the second flat plate portion (x321) is in the range of 1-2 mm.

7. The vehicle door assembly according to any one of claims 1 to 6, characterized in that: The outer surface of the window frame structure (2) has an electrophoretic paint layer formed by means of an electrophoretic process.

8. The vehicle door assembly according to any one of claims 1 to 6, characterized in that: The window frame structure (2) and the door inner panel (1) are welded together using a resistance welding process.

9. A method for preparing a vehicle door assembly, characterized in that: The vehicle door assembly comprises a vehicle door inner panel (1) and a window frame structure (2), wherein the window frame structure (2) is fixedly connected to the vehicle door inner panel (1), and the vehicle door inner panel (1) and the window frame structure (2) are made of steel; The method comprises: A first sealing structure (3) is formed at least partially at a connection position between the door inner panel (1) and the window frame structure (2) by using a laser welding process, wherein at least partially at a connection position is a position that needs to be sealed.

10. The method according to claim 9, characterized in that Also includes: An electrophoretic paint layer is formed on the outer surface of the window frame structure (2) by means of an electrophoretic process.

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