Vehicle body structure, manufacturing method thereof and vehicle

Abstract

The embodiment of the invention discloses a vehicle body structure, a manufacturing method thereof and a vehicle. The vehicle body structure comprises a side wall inner plate, a side wall outer plate and a door ring arranged between the side wall inner plate and the side wall outer plate. The door ring comprises an A column reinforcing plate, a B column reinforcing plate and a threshold reinforcing plate, the A column reinforcing plate, the B column reinforcing plate and the threshold reinforcing plate are sequentially connected in a tailor welding mode to form a semi-finished door ring, and the semi-finished door ring is subjected to hot stamping forming to form the whole door ring. Wherein the A column reinforcing plate, the B column reinforcing plate and the doorsill reinforcing plate are made of different materials with different thicknesses according to the strength requirements of different parts of the door ring. Based on the structure, materials with different thicknesses can be used for connection according to stress conditions, raw materials can be effectively saved, the vehicle safety is guaranteed, meanwhile, the weight of a vehicle can be reduced, and a patch plate does not need to be additionally arranged to reinforce the strength of the door ring structure.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle manufacturing, and in particular to a vehicle body structure, a manufacturing method thereof, and a vehicle. Background Art

[0002] With the continuous development of the automotive industry, automotive products are gradually moving towards safety, energy conservation, environmental protection, and rapid iteration. The traditional body design method of stamping individual parts and then welding them together has seriously restricted automobile development. Integrated one-piece hot forming technology for automotive parts can effectively balance vehicle collision safety performance and vehicle lightweighting, while significantly reducing tooling and manpower input, improving body precision, shortening development cycles, and facilitating rapid product iteration. It is currently a key direction in the development of body technology.

[0003] Currently, traditional automobile bodies are composed of hundreds of parts welded through multiple processes, first welding individual pieces into subassemblies, and finally welding the subassemblies into the final assembly. However, this approach results in a large number of parts, complex manufacturing processes, complex overlap and matching relationships between parts, excessively long dimensional chains, and discontinuous structures at key attachment points. Furthermore, the spot welding process imposes numerous structural restrictions, preventing the optimal ratio of part material and thickness, resulting in low raw material utilization. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a vehicle body structure, a manufacturing method thereof, and a vehicle.

[0005] In a first aspect, an embodiment of the present application provides a vehicle body structure, comprising a side panel inner plate, a side panel outer plate, and a door ring provided between the side panel inner plate and the side panel outer plate;

[0006] The door ring includes an A-pillar reinforcement plate, a B-pillar reinforcement plate and a door sill reinforcement plate, the A-pillar reinforcement plate, the B-pillar reinforcement plate and the door sill reinforcement plate are sequentially welded together to form a semi-finished door ring, and the semi-finished door ring is hot stamped to form an integral door ring;

[0007] Among them, according to the strength requirements of different parts of the door ring, the A-pillar reinforcement plate, the B-pillar reinforcement plate and the door sill reinforcement plate are made of materials of different materials and thicknesses.

[0008] In one embodiment, the A-pillar reinforcement plate, the B-pillar reinforcement plate and the rocker reinforcement plate are welded together by friction stir welding.

[0009] In one embodiment, the A-pillar reinforcement plate includes an A-pillar lower reinforcement plate and an A-pillar upper reinforcement plate, the A-pillar lower reinforcement plate is provided on a side opposite to the B-pillar reinforcement plate, one end of the A-pillar upper reinforcement plate is welded to one end of the B-pillar reinforcement plate, the other end of the A-pillar upper reinforcement plate is welded to one end of the A-pillar lower reinforcement plate, and the other end of the A-pillar lower reinforcement plate is welded to the rocker reinforcement plate;

[0010] The thickness of the A-pillar lower reinforcement plate is less than or equal to the thickness of the A-pillar upper reinforcement plate, and the thickness of the B-pillar reinforcement plate is less than the thickness of the A-pillar lower reinforcement plate.

[0011] In one embodiment, the A-pillar lower reinforcement plate includes a plurality of first connecting plates that are sequentially welded together, and one end of the first connecting plate close to the A-pillar upper reinforcement plate is welded to the A-pillar upper reinforcement plate;

[0012] The thickness of the plurality of first connecting plates gradually increases in a direction toward the A-pillar upper reinforcement plate.

[0013] In one embodiment, a first positioning block extends from the outer side of both ends of the first connecting plate, and the first positioning block is provided with a first positioning hole. A second positioning block extends from the outer side of the A-pillar upper reinforcement plate, and the second positioning block is provided with a second positioning hole.

[0014] Wherein, when the first connecting plate is connected to the A-pillar upper reinforcement plate, the first positioning block abuts against the second positioning block.

[0015] In one embodiment, the B-pillar reinforcement plate includes a plurality of second connecting plates that are welded together in sequence, and the second connecting plate is welded to the A-pillar upper reinforcement plate at one end close to the A-pillar upper reinforcement plate, and the thickness of the second connecting plate is less than the thickness of the A-pillar lower reinforcement plate; and the thickness of the plurality of second connecting plates gradually increases in the direction toward the A-pillar upper reinforcement plate.

[0016] In one embodiment, a third positioning block is extended from the outer side of both ends of the second connecting plate, and the third positioning block is provided with a third positioning hole. A fourth positioning block is provided on the outer side of the A-pillar upper reinforcement plate, and the fourth positioning block is provided with a fourth positioning hole.

[0017] Wherein, when the second connecting plate is connected to the A-pillar upper reinforcement plate, the third positioning block abuts against the fourth positioning block.

[0018] In one embodiment, the side panel inner panel includes a left side panel inner panel and a right side panel inner panel symmetrically arranged on both sides, and the left side panel inner panel and the right side panel inner panel are welded and hot stamped to form an integral body;

[0019] Wherein, the left side inner panel and the right side inner panel are both formed by welding multiple plates together.

[0020] In one embodiment, the side outer panel includes a left side outer panel and a right side outer panel symmetrically arranged on both sides, and the left side outer panel and the right side outer panel are welded and hot stamped to form an integral body;

[0021] Wherein, the left side outer panel and the right side outer panel are both formed by welding multiple plates together.

[0022] In a second aspect, an embodiment of the present application further provides a method for manufacturing a vehicle body structure, comprising the following steps:

[0023] According to the strength requirements of various parts of the car body, materials of different materials and thicknesses are selected for blanking to obtain blanks for various parts of the car body; wherein, the blanks include A-pillar reinforcement blanks, B-pillar reinforcement blanks, door sill reinforcement blanks, side panel inner blanks and side panel outer blanks;

[0024] The A-pillar reinforcement blanks, the B-pillar reinforcement blanks and the door sill reinforcement blanks are sequentially welded together to form a semi-finished door ring, and the semi-finished door ring is hot stamped to form a door ring;

[0025] The side panel inner panels are formed by sequentially welding the blanks from the side panel inner parts to form semi-finished side panel inner panels, and then the side panel inner panels are thermoformed and stamped to form side panel inner panels;

[0026] The side panel outer panels are formed by welding the side panel outer blanks in sequence, and then the side panel outer panels are thermoformed and stamped to form the side panel outer panels;

[0027] The side panel inner panel, the door ring and the side panel outer panel are connected to form a vehicle body structure.

[0028] In a third aspect, an embodiment of the present application further provides a vehicle comprising the vehicle body structure described in the first aspect.

[0029] Compared with the prior art, the above technical solutions provided by the embodiments of the present application have the following beneficial effects:

[0030] This approach allows for the use of materials of varying thicknesses to be connected based on stress conditions, effectively conserving raw materials and reducing vehicle weight while ensuring safety. It eliminates the need for additional patch panels to reinforce the door ring structure. Furthermore, compared to the traditional stamping-and-welding method, this approach reduces the number of molds, fixtures, and welding robots required, significantly reducing tooling costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of a side panel inner plate and a side panel outer plate in a vehicle body structure of the present application;

[0032] Figure 2 This is a schematic structural diagram of a door ring in a vehicle body structure of the present application;

[0033] Figure 3 This is a structural diagram of an A-pillar reinforcement plate in a vehicle body structure of the present application;

[0034] Figure 4 This is a schematic structural diagram of a B-pillar reinforcement plate and a door sill reinforcement plate in a vehicle body structure of the present application;

[0035] Figure 5 It is a flow chart of a method for manufacturing a vehicle body structure of the present application.

[0036] Numbers in the figure:

[0037] 10. Side outer panel; 20. Side inner panel; 30. Door knocker; 31. A-pillar reinforcement plate; 311. A-pillar upper reinforcement plate; 3111. Second positioning block; 3111a. Second positioning hole; 3112. Fourth positioning block; 3112a. Fourth positioning hole; 312. A-pillar lower reinforcement plate; 3121. First connecting plate; 31211. First positioning block; 31211a. First positioning hole; 31212. First fixing hole; 32. B-pillar reinforcement plate; 321. Second connecting plate; 3211. Third positioning block; 3211a. Third positioning hole; 33. Door sill reinforcement plate; 33a. Second fixing hole. DETAILED DESCRIPTION

[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0039] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0040] Please refer to Figure 1 and Figure 2 The embodiment of the present application provides a vehicle body structure, including a side panel inner 20, a side panel outer 10, and a door ring 30 disposed between the side panel inner 20 and the side panel outer 10. The door ring 30 includes a B-pillar reinforcement plate 32, an A-pillar reinforcement plate 31, and a door sill reinforcement plate 33.

[0041] Specifically, the door ring 30 comprises an A-pillar reinforcement plate 31, a B-pillar reinforcement plate 32, and a door sill reinforcement plate 33. These plates are welded together to form a semi-finished door ring, which is then hot-stamped to form the complete door ring. The A-pillar reinforcement plate 31, the B-pillar reinforcement plate 32, and the door sill reinforcement plate 33 are made of different materials and thicknesses, depending on the strength requirements of different parts of the door ring.

[0042] It should be noted that the side panel inner 20 and side panel outer 10 can also adopt the same structural method as the door ring 30, that is, the various parts of the side panel inner 20 and side panel outer 10 are first welded together to form a single piece, and then thermoformed and stamped to form the side panel inner 20 or side panel outer 10. Because the side panel inner 20 and side panel outer 10 are both welded first and then stamped, the material type and thickness of each part can be selected according to different stress conditions.

[0043] Based on the vehicle body structure with the above technical features, the door ring 30, which is located between the side inner panel 20 and the side outer panel 10, is formed by sequentially welding the A-pillar reinforcement plate 31, the B-pillar reinforcement plate 32, and the door sill reinforcement plate 33 to form a semi-finished door ring. The semi-finished door ring is then hot-stamped using a thermoforming method. The A-pillar reinforcement plate 31, the B-pillar reinforcement plate 32, and the door sill reinforcement plate 33 can be made of different materials and thicknesses according to the strength requirements of different parts of the door ring 30. This allows the use of materials of different thicknesses to be connected according to the stress conditions, effectively saving raw materials. While ensuring vehicle safety, it can also reduce the weight of the vehicle without the need for additional patch plates to strengthen the door ring structure. At the same time, compared with the traditional method of stamping and then welding, it can reduce the required molds, fixtures, welding robots, etc., significantly reducing tooling costs.

[0044] In one embodiment, the A-pillar reinforcement plate 31, the B-pillar reinforcement plate 32, and the rocker reinforcement plate 33 are welded together using friction stir welding. Specifically, the friction welding method used in this embodiment can better weld the A-pillar reinforcement plate 31, the B-pillar reinforcement plate 32, and the rocker reinforcement plate 33 more firmly.

[0045] In other embodiments, the A-pillar reinforcement plate 31 , the B-pillar reinforcement plate 32 and the rocker reinforcement plate 33 may be welded by laser welding or other welding methods in the prior art, which are not limited thereto.

[0046] In one embodiment, the A-pillar reinforcement plate 31 includes an A-pillar lower reinforcement plate 312 and an A-pillar upper reinforcement plate 311. The A-pillar lower reinforcement plate 312 is located on the side opposite the B-pillar reinforcement plate 32. One end of the A-pillar upper reinforcement plate 311 is welded to one end of the B-pillar reinforcement plate 32. The other end of the A-pillar upper reinforcement plate 311 is welded to one end of the A-pillar lower reinforcement plate 312. The other end of the A-pillar lower reinforcement plate 312 is welded to the side sill reinforcement plate 33. The thickness of the A-pillar lower reinforcement plate 312 is less than or equal to the thickness of the A-pillar upper reinforcement plate 311, and the thickness of the B-pillar reinforcement plate 32 is less than the thickness of the A-pillar lower reinforcement plate 312.

[0047] Exemplarily, the A-pillar reinforcement plate 31 is formed by welding the A-pillar lower reinforcement plate 312 and the A-pillar upper reinforcement plate 311 together, so that the material and thickness of different positions of the A-pillar reinforcement plate 31 can be set accordingly according to different collision requirements, that is: since the collision resistance required of the A-pillar upper reinforcement plate 311 is higher than that of the A-pillar lower reinforcement plate 312, the thickness of the A-pillar upper reinforcement plate 311 can be set to be thicker than the A-pillar lower reinforcement plate 312 (for example: the thickness of the A-pillar upper reinforcement plate 311 is 3 mm, and the thickness of the A-pillar lower reinforcement plate 312 is 2 mm).

[0048] In other embodiments, the A-pillar upper reinforcement plate 311 and the A-pillar lower reinforcement plate 312 can be welded together by selecting different materials to meet the anti-collision requirements of different areas, that is: since the anti-collision performance required of the A-pillar upper reinforcement plate 311 is higher than that of the A-pillar lower reinforcement plate 312, the A-pillar upper reinforcement plate 311 is made of 7 series aluminum and the A-pillar lower reinforcement plate 312 is made of 6 series aluminum.

[0049] Similarly, since the collision resistance borne by the B-pillar is slightly lower than that of the A-pillar, the thickness of the B-pillar reinforcement plate 32 can be set to be smaller than the A-pillar lower reinforcement plate 312 and the A-pillar upper reinforcement plate 311 under the premise of the same material. Alternatively, the B-pillar reinforcement plate 32 can be made of 6 series aluminum, and the A-pillar lower reinforcement plate 312 and the A-pillar upper reinforcement plate 311 can be made of 7 series aluminum under the premise of the same thickness.

[0050] In addition, in the process of using the hot forming stamping process to form the side inner panel 20, the side outer panel 10 and the various parts of the door ring into an integrated structure, they need to be artificially aged to eliminate the residual stress of the casting, which can greatly improve the stability of the vehicle body structure.

[0051] In one embodiment, the A-pillar lower reinforcement plate 312 includes multiple first connecting plates 3121 that are welded together in sequence. The first connecting plates 3121 are welded to the A-pillar upper reinforcement plate 311 at one end thereof that is adjacent to the A-pillar upper reinforcement plate 311. The thickness of the multiple first connecting plates 3121 gradually increases toward the A-pillar upper reinforcement plate 311.

[0052] It should be noted that the "multiple blocks" mentioned above refer to two or more blocks, which can be set according to actual needs and are not limited to this.

[0053] For example, the A-pillar lower reinforcement plate 312 is constructed by welding two first connecting plates 3121. The two first connecting plates are respectively referred to as first connecting plate a and first connecting plate b, and the reinforcement plate closer to the A-pillar is first connecting plate a.

[0054] Specifically, the first connecting plate a and the first connecting plate b can be made of the same material but different thicknesses, that is: the first connecting plate a is made of 7 series aluminum, with a thickness of 1.5 mm and a yield tensile strength greater than 500 MPa; the first connecting plate b is made of 7 series aluminum, with a thickness of 1 mm and a yield tensile strength greater than 500 MPa.

[0055] In other embodiments, the first connecting plate a and the first connecting plate b may also be made of different materials and have different thicknesses, that is: the first connecting plate a is made of 7 series aluminum material, with a thickness of 1.5 mm, and a yield tensile strength greater than 500 MPa; the first connecting plate b is made of 6 series aluminum material, with a thickness of 1.2 mm, and a yield tensile strength greater than 500 MPa.

[0056] It can be seen that the various parts of the A-pillar lower reinforcement plate 312 can be set with corresponding materials and thicknesses according to different force analyses, which can achieve the optimal ratio of part materials and material thicknesses, ensuring safety performance while effectively saving raw materials.

[0057] In this embodiment, the A-pillar lower reinforcement plate 312 is formed by welding multiple first connecting plates 3121 in sequence, and the thickness of the multiple first connecting plates 3121 is set to gradually increase in the direction toward the A-pillar upper reinforcement plate 311, so that corresponding materials and thicknesses can be given to various parts of the A-pillar lower reinforcement plate 312 according to the force analysis conditions and collision performance requirements, thereby effectively saving materials and reducing production costs while meeting strength requirements.

[0058] In one embodiment, a first positioning block 31211 extends from the outer sides of both ends of the first connecting plate 3121. The first positioning block 31211 defines a first positioning hole 3121a. A second positioning block 3111 extends from the outer side of the A-pillar upper reinforcement plate 311. The second positioning block 3111 defines a second positioning hole 3111a. When the first connecting plate 3121 is connected to the A-pillar upper reinforcement plate 311, the first positioning block 31211 abuts the second positioning block 3111.

[0059] For example, during the process of butt-welding multiple first connecting plates 3121, the first connecting plates 3121 need to be fixed to prevent movement that affects the welding accuracy. To this end, in this embodiment, first positioning blocks 31211 are provided on the outer sides of both ends of the first connecting plates 3121, and first positioning holes 31211a are opened on the first positioning blocks 31211. This ensures that during the butt-welding process of the first connecting plates 3121, the first positioning holes 31211a cooperate with the positioning members to ensure that the first connecting plates 3121 do not move. This eliminates the need for additional special fixtures to clamp the first connecting plates 3121, thereby reducing the number of required fixtures and further reducing tooling costs.

[0060] In one embodiment, the B-pillar reinforcement plate 32 includes a plurality of second connecting plates 321 that are welded together in sequence. The second connecting plate 321 is welded to the A-pillar upper reinforcement plate 311 at one end thereof close to the A-pillar upper reinforcement plate 311. The thickness of the second connecting plate 321 is less than that of the A-pillar lower reinforcement plate 312. The thickness of the plurality of second connecting plates 321 gradually increases in the direction toward the A-pillar upper reinforcement plate 311.

[0061] It should be noted that the "multiple blocks" mentioned above refer to two or more blocks, which can be set according to actual needs and are not limited to this.

[0062] Exemplarily, the B-pillar reinforcement plate 32 is formed by welding multiple second connecting plates 321 in sequence, and the thickness of the multiple second connecting plates 321 is set to gradually increase in the direction toward the A-pillar upper reinforcement plate 311, so that corresponding materials and thicknesses can be given to various parts of the formed B-pillar reinforcement plate 32 according to the force analysis conditions and collision performance requirements, thereby effectively saving materials and reducing production costs while meeting strength requirements.

[0063] In one embodiment, third positioning blocks 3211 extend from the outer sides of both ends of the second connecting plate 321. The third positioning blocks 3211 are defined by third positioning holes 3211a. Fourth positioning blocks 3112 are defined by fourth positioning holes 3112a on the outer sides of the A-pillar upper reinforcement plate 311. When the second connecting plate 321 is connected to the A-pillar upper reinforcement plate 311, the third positioning blocks 3211 abut against the fourth positioning blocks 3112.

[0064] For example, a third positioning block 3211 is provided on the outer side of both ends of the second connecting plate 321, and a fourth positioning block 3112 is provided on the first connecting end of the A-pillar upper reinforcement plate 311, and a third positioning hole 3211a and a fourth positioning hole 3112a are opened on the third positioning block 3211 and the fourth positioning block 3112, so that when the second connecting plate 321 and the A-pillar upper reinforcement plate 311 are welded together, the second connecting plate 321 and the A-pillar upper reinforcement plate 311 will not move, and there is no need to use special clamps for clamping, which can further reduce tooling costs.

[0065] In order to facilitate understanding of the fixing principle of the welding process between the second connecting plate 321 and the A-pillar upper reinforcement plate 311 , a detailed description thereof is given below.

[0066] The second connecting plate 321 and the A-pillar upper reinforcement plate 311 are placed on their corresponding processing areas, with the third positioning hole 3211a and the fourth positioning hole 3112a secured by their respective positioning members. The third positioning block 3211 on the second connecting plate 321 abuts the fourth positioning block 3112 on the A-pillar upper reinforcement plate 311, and the end surface of the second connecting plate 321 abuts the end surface of the A-pillar upper reinforcement plate 311. The second connecting plate 321 and the A-pillar upper reinforcement plate 311 are then welded together using welding equipment (e.g., a laser welder). This effectively prevents movement during the welding process.

[0067] In one embodiment, a first fixing hole 31212 is defined on the inner side of the first connecting plate 3121 adjacent to the A-pillar upper reinforcement plate 311. The first fixing hole 31212 is used to secure the welded A-pillar lower reinforcement plate 312. A second fixing hole 33a is defined on the inner side of the rocker reinforcement plate 33. The second fixing hole 33a is used to secure the rocker reinforcement plate 33.

[0068] For example, the welded-to-one A-pillar lower reinforcement plate 312 can be fixed by using a fixing member (such as a fixing bolt) through the first fixing hole 31212 to avoid movement during the welding process, which may lead to incomplete welding or poor welding quality.

[0069] Likewise, the rocker reinforcement plate 33 can be fixed by using a fixing piece passing through the second fixing hole 33 a to avoid movement during welding, which may result in incomplete welding or poor welding quality.

[0070] In one embodiment, the side inner panel 20 includes a left side inner panel and a right side inner panel symmetrically arranged on both sides, and the left side inner panel and the right side inner panel are welded together and hot stamped into one piece; wherein, the left side inner panel and the right side inner panel are both welded together by multiple pieces of sheet metal.

[0071] Exemplarily, the side inner panel 20 is formed by welding together a symmetrical left side inner panel and a right side inner panel, and both the left side inner panel and the right side inner panel are formed by welding together multiple sheets of sheet metal, so that different materials and thicknesses can be selected according to the stress analysis of the vehicle body, ensuring safety while saving materials, which is conducive to reducing the weight of the vehicle body.

[0072] In one embodiment, the side outer panel 10 includes a left side outer panel and a right side outer panel symmetrically arranged on both sides, and the left side outer panel and the right side outer panel are welded together and hot stamped into one piece; wherein, the left side outer panel and the right side outer panel are both welded together by multiple pieces of sheet metal.

[0073] Exemplarily, the side outer panel 10 is formed by welding together a symmetrical left side outer panel and a right side outer panel, and both the left side outer panel and the right side outer panel are formed by welding together multiple sheets, so that different materials and thicknesses can be selected according to the stress analysis of the vehicle body, which ensures safety while saving materials and helps to reduce the weight of the vehicle body.

[0074] In summary, the vehicle body structure of the embodiment of the present application can connect materials of different materials and thicknesses by using laser welding or stir friction welding to achieve the performance requirements of the vehicle body in different areas and the optimal ratio of materials and thicknesses, which can effectively save materials; compared with the traditional method of forming first and then spot welding, the use of hot stamping to stamp the overall welded structure can avoid collision performance differences caused by differences in the consistency of the states of multiple parts, and can also reduce the probability of weld failure and improve the safety performance of the entire vehicle.

[0075] The present invention also provides a method for manufacturing a vehicle body structure, comprising the following steps:

[0076] S100. According to the strength requirements of various parts of the vehicle body, materials of different materials and thicknesses are selected for blanking to obtain blanks for various parts of the vehicle body; wherein the blanks include A-pillar reinforcement blanks, B-pillar reinforcement blanks, door sill reinforcement blanks, side panel inner blanks, and side panel outer blanks.

[0077] S200, welding the A-pillar reinforcement blanks, the B-pillar reinforcement blanks and the door sill reinforcement blanks in sequence to form a semi-finished door ring, and hot stamping the semi-finished door ring to form a door ring.

[0078] For example, the A-pillar reinforcement blanks, B-pillar reinforcement blanks and door sill reinforcement blanks are welded together by friction stir welding or laser welding to form a semi-finished door ring, and then the semi-finished door ring is hot stamped by thermoforming to form a door ring. This can achieve connection using materials of different thicknesses according to the stress conditions, effectively saving raw materials, and reducing the weight of the vehicle while ensuring vehicle safety. There is no need to set up additional patch plates to strengthen the strength of the door ring structure.

[0079] S300: Use the side panel inner blanks to weld in sequence to form a semi-finished side panel inner panel, and perform thermoforming and stamping on the side panel inner panel to form the side panel inner panel.

[0080] For example, the side panel inner panel 20 is formed by individually blanking multiple pieces, which are then welded together to form a semi-finished side panel inner panel. Finally, the semi-finished side panel inner panel is stamped out using a thermoforming stamping process to form the side panel inner panel 20. Since the side panel inner panel is welded together from multiple pieces, different materials and thicknesses can be selected based on different stress conditions, achieving an optimal ratio of material and thickness.

[0081] S400: Use the side panel outer blanks to weld in sequence to form a semi-finished side panel outer panel, and perform thermoforming and stamping on the side panel outer panel to form the side panel outer panel.

[0082] For example, the side panel 10 is formed by individually blanking multiple pieces, which are then welded together to form a semi-finished side panel. Finally, the semi-finished side panel is stamped out using a thermoforming stamping process to form the side panel 10. Since the side panel 10 is welded together from multiple pieces, different materials and thicknesses can be selected based on different stress conditions, achieving an optimal ratio of material and thickness.

[0083] S500 , connecting the side panel inner panel 20 , the door ring 30 and the side panel outer panel 10 to form a vehicle body structure.

[0084] Compared with the traditional technical solution of first stamping and then using laser welding to form the body structure, the manufacturing method of the body structure of this embodiment is that the side inner panel 20, the side outer panel 10 and the door ring 30 are first connected into one body by welding, so that different materials and thicknesses can be designed in different areas according to different stress conditions, and the optimal ratio of material and material thickness can be achieved. It can also effectively reduce the weight of the body while ensuring safety performance.

[0085] An embodiment of the present application also provides a vehicle, comprising the vehicle body structure of the above embodiment.

[0086] It should be noted that the vehicle in the embodiment of the present application may be an electric vehicle, a hybrid vehicle, or other types of vehicles, without limitation thereto.

[0087] According to the vehicle of this embodiment, by providing the body structure of the above embodiment, the structural strength of the vehicle is improved, the weight of the vehicle is reduced, the production cost of the vehicle is reduced, the production process of the vehicle is simplified, and production and manufacturing are facilitated.

[0088] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A vehicle body structure, characterized in that: It includes a side panel inner plate, a side panel outer plate and a door ring provided between the side panel inner plate and the side panel outer plate; The door ring includes an A-pillar reinforcement plate, a B-pillar reinforcement plate and a door sill reinforcement plate, the A-pillar reinforcement plate, the B-pillar reinforcement plate and the door sill reinforcement plate are sequentially welded together to form a semi-finished door ring, and the semi-finished door ring is hot stamped to form an integral door ring; Among them, according to the strength requirements of different parts of the door ring, the A-pillar reinforcement plate, the B-pillar reinforcement plate and the door sill reinforcement plate are made of materials of different materials and thicknesses.

2. The vehicle body structure according to claim 1, wherein: The A-pillar reinforcement plate, the B-pillar reinforcement plate and the door sill reinforcement plate are welded together by friction stir welding.

3. The vehicle body structure according to claim 2, characterized in that: The A-pillar reinforcement plate includes an A-pillar lower reinforcement plate and an A-pillar upper reinforcement plate, the A-pillar lower reinforcement plate is provided on a side opposite to the B-pillar reinforcement plate, one end of the A-pillar upper reinforcement plate is welded to one end of the B-pillar reinforcement plate, the other end of the A-pillar upper reinforcement plate is welded to one end of the A-pillar lower reinforcement plate, and the other end of the A-pillar lower reinforcement plate is welded to the rocker reinforcement plate; The thickness of the A-pillar lower reinforcement plate is less than or equal to the thickness of the A-pillar upper reinforcement plate, and the thickness of the B-pillar reinforcement plate is less than the thickness of the A-pillar lower reinforcement plate.

4. The vehicle body structure according to claim 1, wherein: The A-pillar lower reinforcement plate includes a plurality of first connecting plates that are welded together in sequence, and one end of the first connecting plate close to the A-pillar upper reinforcement plate is welded together with the A-pillar upper reinforcement plate; The thickness of the plurality of first connecting plates gradually increases in a direction toward the A-pillar upper reinforcement plate.

5. The vehicle body structure according to claim 4, characterized in that: A first positioning block is extended from the outer side of both ends of the first connecting plate, and a first positioning hole is formed in the first positioning block; a second positioning block is extended from the outer side of the A-pillar upper reinforcement plate, and a second positioning hole is formed in the second positioning block; Wherein, when the first connecting plate is connected to the A-pillar upper reinforcement plate, the first positioning block abuts against the second positioning block.

6. The vehicle body structure according to claim 1, wherein: The B-pillar reinforcement plate includes multiple second connecting plates that are welded together in sequence. The second connecting plate is welded to the A-pillar upper reinforcement plate at one end close to the A-pillar upper reinforcement plate. The thickness of the second connecting plate is less than the thickness of the A-pillar lower reinforcement plate; and the thickness of the multiple second connecting plates gradually increases in the direction toward the A-pillar upper reinforcement plate.

7. The vehicle body structure according to claim 1, wherein: A third positioning block is extended from the outer side of both ends of the second connecting plate, and the third positioning block is provided with a third positioning hole. A fourth positioning block is provided on the outer side of the A-pillar upper reinforcement plate, and the fourth positioning block is provided with a fourth positioning hole. Wherein, when the second connecting plate is connected to the A-pillar upper reinforcement plate, the third positioning block abuts against the fourth positioning block.

8. The vehicle body structure according to claim 1, wherein: The side panel inner plate comprises a left side panel inner plate and a right side panel inner plate symmetrically arranged on both sides, the left side panel inner plate and the right side panel inner plate are welded and hot stamped to form an integral body; Wherein, the left side inner panel and the right side inner panel are both formed by welding multiple plates together.

9. The vehicle body structure according to claim 1, wherein: The side outer panels include a left side outer panel and a right side outer panel symmetrically arranged on both sides, and the left side outer panel and the right side outer panel are welded and hot stamped to form an integral body; Wherein, the left side outer panel and the right side outer panel are both formed by welding multiple plates together.

10. A method for manufacturing a vehicle body structure, characterized in that: The following steps are involved: According to the strength requirements of various parts of the car body, materials of different materials and thicknesses are selected for blanking to obtain blanks for various parts of the car body; wherein, the blanks include A-pillar reinforcement blanks, B-pillar reinforcement blanks, door sill reinforcement blanks, side panel inner blanks and side panel outer blanks; The A-pillar reinforcement blanks, the B-pillar reinforcement blanks and the door sill reinforcement blanks are sequentially welded together to form a semi-finished door ring, and the semi-finished door ring is hot stamped to form a door ring; The side panel inner panels are formed by sequentially welding the blanks from the side panel inner parts to form semi-finished side panel inner panels, and then the side panel inner panels are thermoformed and stamped to form side panel inner panels; The side panel outer panels are formed by welding the side panel outer blanks in sequence, and then the side panel outer panels are thermoformed and stamped to form the side panel outer panels; The side panel inner panel, the door ring and the side panel outer panel are connected to form a vehicle body structure.

11. A vehicle, characterized in that: The vehicle body structure comprises the vehicle body structure according to any one of claims 1 to 9.

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