Car body corner sealing structure and stamping forming process method thereof

Abstract

The invention discloses a vehicle body corner sealing structure and a stamping forming process method thereof, the vehicle body corner sealing structure comprises a side wall outer plate, a gutter channel plate, a first connecting assembly, a second connecting assembly and a sealing assembly, and the side wall outer plate is provided with an arc-shaped opening; the first connecting assembly comprises a connecting side wall, a connecting inclined plane and a side wall flange, the first side of the connecting side wall is vertically connected with the side edge of the side wall outer plate, the second side of the connecting side wall is connected with the first side of the connecting inclined plane, and the second side of the connecting inclined plane is connected with the side wall flange; the second connecting assembly is arranged at the end of the gutter channel plate, the side edge of the gutter channel plate is connected with an arc-shaped opening of the side wall outer plate, and the second connecting assembly is connected with the connecting side wall, the connecting inclined face and the side wall flange. The sealing assembly is arranged between the first connecting assembly and the second connecting assembly and outside the second connecting assembly. The connecting side wall, the connecting inclined face, the side wall flange and the second connecting assembly form multi-face and multi-layer lap joint matching, and the effective lap joint area between the sheet metal parts is greatly increased.

Description

Technical Field

[0001] This invention relates to the field of automotive processing technology, and more specifically, to a corner sealing structure for a car body and its stamping forming process. Background Technology

[0002] In traditional vehicle body design, the corner area above the drainage channel faces challenges during stamping due to space constraints and complex geometry, including difficulties in material flow and a tendency to wrinkle and crack. Consequently, the flange height in this area is often designed to be short, resulting in insufficient effective overlap between sheet metal parts and weak connection rigidity. During vehicle use, the body structure is subjected to various loads and vibrations. Due to insufficient local strength, this area is prone to micro-deformation, causing excessive shear stress on the sealing adhesive layer. Over time, this can lead to adhesive layer cracking, seal failure, and ultimately, water leakage, affecting vehicle quality and lifespan.

[0003] Currently, the industry often addresses such issues by adding a reinforcing plate, using manual brazing to strengthen the parts, and optimizing the gluing process as supplementary measures. This results in increased vehicle weight and higher manufacturing costs. Furthermore, manual welding of thin outer stamping parts is difficult and the quality is hard to control. This approach fails to fundamentally solve the strength and sealing problems caused by insufficient flanges, inadequate number of weld points, and weak structural strength in the stamping parts.

[0004] Therefore, how to provide a vehicle body corner sealing structure and its stamping forming process has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a new technical solution for a vehicle body corner sealing structure and its stamping forming process.

[0006] According to a first aspect of the present invention, a vehicle body corner sealing structure is provided, comprising: a side panel, a water channel plate, a first connecting assembly, a second connecting assembly, and a sealing assembly, wherein one end of the side panel has an arc-shaped opening;

[0007] The first connecting assembly includes a connecting sidewall, a connecting ramp, and a side flange. The first side of the connecting sidewall is perpendicularly connected to the side edge of the outer side panel. The second side of the connecting sidewall is connected to the first side of the connecting ramp. The second side of the connecting ramp is connected to the side flange.

[0008] The second connecting component is disposed at the end of the water trough plate, the side of the water trough plate is connected to the arc-shaped opening of the side outer plate, and the second connecting component is connected to the connecting side wall, the connecting inclined surface and the side flange respectively;

[0009] The sealing assembly is disposed between the first connecting assembly and the second connecting assembly, and on the outside of the second connecting assembly.

[0010] Optionally, the second connecting component includes a first flange, a second flange, and a transition plate. The first flange and the second flange are respectively disposed on both sides of the end of the water trough plate. The transition plate is connected to the first flange and the second flange respectively, and the included angle between the transition plate and the second flange is greater than the included angle between the transition plate and the first flange.

[0011] The inner wall of the first flange is connected to the outer wall of the connecting side wall, the inner wall of the second flange is connected to the outer wall of the side flange, and the inner wall of the transition plate is connected to the outer wall of the connecting slope.

[0012] Optionally, the first flange is perpendicularly connected to the transition plate.

[0013] Optionally, the width of the first flange, the width of the second flange, and the width of the transition plate are all at least 15 mm.

[0014] Optionally, the overlap length between the first flange and the connecting sidewall, the overlap length between the second flange and the side flange, and the overlap length between the transition plate and the connecting slope are all at least 12 mm.

[0015] Optionally, the water trough plate has an arc-shaped edge, and an Apras welding point is provided on the arc-shaped edge. The water trough plate and the outer side panel are welded through the Apras welding point, and the distance between two adjacent Apras welding points near the first connecting component is less than 60mm.

[0016] Optionally, the sealing assembly includes an inner sealant and an outer sealant, the inner sealant being disposed between the first connecting assembly and the second connecting assembly, and the outer sealant being coated on the outside of the second connecting assembly.

[0017] According to a second aspect of the present invention, a stamping forming process for a vehicle body corner sealing structure is provided, comprising the following steps:

[0018] The stamping process involves stamping the workpiece of the water tank to obtain a stamped part;

[0019] The drawing process involves drawing and drafting the first flange, second flange, and transition plate of the stamped part to obtain the drawn part. The edge shrinkage is 5mm, and a process supplement surface is designed. The parting line bends along the product structure.

[0020] The straightening process involves straightening the drawn part along the straightening edge line to obtain the straightened part, wherein the straightening edge line is 10mm away from the process supplement surface;

[0021] The side repair process involves performing side repair on the part being repaired along the trimming edge line to obtain a preformed part. The angle between the direction of the trimming edge line and the process supplementary surface is 75° to 105°.

[0022] The shaping process involves shaping the preform along the side trimming line to obtain the water trough.

[0023] Optionally, in the drawing process, the draft angle is increased by 3° to 5°.

[0024] The beneficial effects of this invention are as follows:

[0025] This invention replaces the traditional single complex corner with a segmented, gradually changing geometric structure of connecting sidewalls, connecting slopes, and side flanges. This optimizes the material flow path of sheet metal parts and alleviates the problems of material accumulation and flow obstruction caused by limited space and geometric abrupt changes in traditional corners. Furthermore, the connecting sidewalls, connecting slopes, and side flanges form a multi-faceted and multi-level overlapping fit with the second connecting component, which greatly increases the effective overlap area between sheet metal parts. This is far superior to the small-area overlap of traditional short flanges, effectively reducing the risk of sheet metal wrinkling and cracking during stamping. It also eliminates the design limitation of shortening the flange height due to stamping defects, thus avoiding stamping process defects from the source.

[0026] Furthermore, the sealing components are arranged between and outside the connecting components to form a multi-layer, fully enclosed seal. The sealing path is longer and the sealing effect is more stable, which fundamentally solves the problems of adhesive layer failure and water leakage, improves the vehicle's sealing performance, quality and service life, and also greatly reduces the shear stress on the sealing components, preventing the adhesive layer from cracking and falling off due to excessive shear stress.

[0027] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0029] Figure 1 This is a structural diagram of the vehicle body corner sealing structure of the present invention;

[0030] Figure 2 This is a structural diagram of the sealing assembly of the present invention;

[0031] Figure 3 This is an exploded view of the vehicle body corner sealing structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the drawing process of the present invention;

[0033] Figure 5 This is a schematic diagram of the repair process of the present invention;

[0034] Figure 6 This is a schematic diagram of the side repair process of the present invention;

[0035] Figure 7 This is a schematic diagram of the shaping process of the present invention.

[0036] The following are marked in the diagram: 1. Side panel; 11. Arc-shaped opening; 2. Flow channel plate; 3. First connecting assembly; 31. Connecting side wall; 32. Connecting slope; 33. Side flange; 4. Second connecting assembly; 41. First flange; 42. Second flange; 43. Transition plate; 44. Apras welding point; 5. Sealing assembly; 51. Inner sealant; 52. Outer sealant; 10. Process supplementary surface; 20. Parting line; 30. Front trimming line; 40. Hook trimming line; 50. Side trimming line. Detailed Implementation

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0038] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0039] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0040] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0041] like Figures 1 to 3 As shown, an embodiment of the present invention provides a vehicle body corner sealing structure, including: a side outer panel 1, a water channel plate 2, a first connecting component 3, a second connecting component 4, and a sealing component 5, wherein one end of the side outer panel 1 has an arc-shaped opening 11.

[0042] The first connecting assembly 3 includes a connecting sidewall 31, a connecting ramp 32, and a side flange 33. The first side of the connecting sidewall 31 is perpendicularly connected to the side edge of the outer side panel 1, the second side of the connecting sidewall 31 is connected to the first side of the connecting ramp 32, and the second side of the connecting ramp 32 is connected to the side flange 33.

[0043] The second connecting component 4 is located at the end of the water trough plate 2. The side of the water trough plate 2 is connected to the arc-shaped opening 11 of the side outer plate 1. The second connecting component 4 is connected to the connecting side wall 31, the connecting inclined surface 32 and the side flange 33 respectively.

[0044] The sealing component 5 is disposed between the first connecting component 3 and the second connecting component 4 and on the outside of the second connecting component 4.

[0045] This invention replaces the traditional single complex corner with a segmented, gradually changing geometric structure of connecting sidewall 31, connecting slope 32, and side flange 33, optimizing the material flow path of sheet metal parts and alleviating the problems of material accumulation and flow obstruction caused by limited space and geometric abrupt changes in traditional corners. Furthermore, the connecting sidewall 31, connecting slope 32, and side flange 33 form a multi-faceted and multi-level overlapping fit with the second connecting component 4, which greatly increases the effective overlapping area between sheet metal parts. This is far superior to the small-area overlapping of traditional short flanges, effectively reducing the risk of sheet metal wrinkling and cracking during stamping. It also eliminates the design limitation of shortening the flange height due to stamping defects, thus avoiding stamping process defects from the source.

[0046] Furthermore, the sealing component 5 is arranged between and outside the connecting components to form a multi-layer, fully enclosed seal. The sealing path is longer and the sealing effect is more stable, which fundamentally solves the problems of adhesive layer failure and sealing leakage, improves the vehicle's sealing performance, quality and service life, and also greatly reduces the shear stress on the sealing component 5, preventing the adhesive layer from cracking and falling off due to excessive shear stress.

[0047] In one embodiment of the vehicle body corner sealing structure of the present invention, such as Figure 1 and Figure 3 As shown, the second connecting component 4 includes a first flange 41, a second flange 42, and a transition plate 43. The first flange 41 and the second flange 42 are respectively disposed on both sides of the end of the water trough plate 2. The transition plate 43 is connected to the first flange 41 and the second flange 42 respectively, and the included angle between the transition plate 43 and the second flange 42 is greater than the included angle between the transition plate 43 and the first flange 41.

[0048] The inner wall of the first flange 41 is connected to the outer wall of the connecting side wall 31, the inner wall of the second flange 42 is connected to the outer wall of the side flange 33, and the inner wall of the transition plate 43 is connected to the outer wall of the connecting slope 32.

[0049] Specifically, the first flange 41, the second flange 42, and the transition plate 43 respectively match and connect to the side wall 31, the side flange 33, and the connecting slope 32, forming a multi-faceted, multi-segmented, and continuously fitted overlapping structure. This significantly increases the effective overlapping area between the outer side panel 1 and the water channel plate 2, improves the connection rigidity and local structural strength, and suppresses micro-deformation in the corner area of ​​the vehicle body. The multi-segmented fitting structure forms a multi-layered, long-path sealing area. The sealing component 5 can be arranged in the fitting gap and on the outside, forming a double sealing guarantee, effectively reducing the risk of water leakage, and improving the sealing performance and service life of the vehicle body.

[0050] The transition plate 43 forms different included angles with the first flange 41 and the second flange 42, forming a gradually changing and smooth transition curved surface structure. This avoids the problems of geometric abrupt changes and sharp space contraction in traditional corners, improves the material flow path of the sheet during stamping, alleviates material accumulation and stress concentration, reduces the risk of wrinkling and cracking, and allows for the design of higher flange heights, thus breaking through the limitations of traditional structures in terms of process.

[0051] Furthermore, the first flange 41, the second flange 42, and the transition plate 43 are all connected to the outer wall of the corresponding connecting component by their inner sidewalls. The bonding surface is flat and the bonding area is large, which facilitates welding, gluing and other processes. The connection accuracy is high and the stability is good, providing a stable and non-deformable mounting base for the sealing component 5, reducing the shear stress of the adhesive layer and avoiding sealing failure.

[0052] In one embodiment of the vehicle body corner sealing structure of the present invention, the first flange 41 and the transition plate 43 are vertically connected to avoid material flow disorder and stress concentration caused by non-right angle transition, effectively reduce the risk of wrinkling and cracking during stamping, and facilitate high dimensional accuracy stamping forming.

[0053] In one embodiment of the vehicle body corner sealing structure of the present invention, the width of the first flange 41, the width of the second flange 42, and the width of the transition plate 43 are all at least 15mm. This configuration significantly expands the contact and overlap range between the first flange 41 and the connecting side wall 31, the second flange 42 and the side flange 33, and the transition plate 43 and the connecting inclined surface 32. Compared with the traditional narrow and short flange, the effective overlap area is increased several times, completely avoiding the defect of insufficient overlap area of ​​the original sheet metal parts.

[0054] Furthermore, the ample overlap width can accommodate a larger number of weld points with more standardized arrangement, achieving uniform stress distribution at multiple points, avoiding local stress concentration, and significantly improving the overall connection rigidity and bonding strength of the corner between the side outer panel 1 and the water channel panel 2. When the vehicle is subjected to load and vibration for a long time, it can effectively suppress local micro-deformation, eliminate a series of chain problems caused by structural deformation, and extend the structural service life of the corner of the vehicle body.

[0055] In one embodiment of the vehicle body corner sealing structure of the present invention, the overlap length of the first flange 41 and the connecting side wall 31, the overlap length of the second flange 42 and the side flange 33, and the overlap length of the transition plate 43 and the connecting inclined surface 32 are all at least 12mm.

[0056] Specifically, the sufficient overlap length creates a continuous and regular sealing gap, avoiding abrupt gap changes and sealing surface discontinuities caused by short overlaps. On the one hand, it provides a stable and continuous adhesion carrier for the sealing component 5, ensuring that the sealant can be evenly applied and fully fill the gap, forming a complete and continuous sealing barrier. On the other hand, sufficient overlap can effectively suppress microscopic deformation of the structure, significantly reduce the shear and tensile stress on the sealant layer, and prevent the sealant layer from cracking or delaminating due to excessive stress. This eliminates the quality risks of seal failure and water leakage from the source, ensuring the long-term stability of the vehicle's sealing performance and improving the quality of vehicle use.

[0057] In one embodiment of the vehicle body corner sealing structure of the present invention, the water channel plate 2 has an arc-shaped edge, and an Apras welding point 44 is provided on the arc-shaped edge. The water channel plate 2 and the side outer panel 1 are welded through the Apras welding point 44, and the distance between two adjacent Apras welding points 44 near the first connecting component 3 is less than 60mm.

[0058] This invention uses the Apras welding process to adapt to the arc-shaped edges of the side panel 1 and the water channel plate 2. Targeting the welding characteristics of thin sheet metal for vehicle body panels, Apras welding is a high-quality pressure welding method with minimal thermal deformation and aesthetically pleasing weld points. It does not damage the paint or substrate of the outer panel surface, avoiding problems such as weld penetration, deformation, panel dents, and excessive thermal stress caused by traditional manual brazing and ordinary spot welding. It perfectly solves the industry pain points of difficult manual welding of thin outer panels and the difficulty in controlling quality. The welded joint has stable mechanical properties and no risk of welding cracks or incomplete welds.

[0059] In one embodiment of the vehicle body corner sealing structure of the present invention, such as Figure 2 As shown, the sealing assembly 5 includes an inner sealant 51 and an outer sealant 52. The inner sealant 51 is disposed between the first connecting assembly 3 and the second connecting assembly 4, and the outer sealant 52 is coated on the outside of the second connecting assembly 4.

[0060] Specifically, the double-layer sealing structure combined with a high-strength rigid connection base significantly optimizes the stress conditions of the sealing layer, fundamentally solving the problem of shear stress overload in the sealing layer caused by large local deformation in traditional structures.

[0061] The inner sealant 51 is located between the two sets of connecting components, encased in a stable internal gap. It does not directly bear external vibration, water flow impact, or alternating loads, resulting in uniform and gentle stress distribution. This effectively prevents excessive shear and tensile deformation of the sealant layer, thus preventing cracking, delamination, and accelerated aging. The outer sealant 52 only serves an external protective function. Relying on the advantage of its internal rigid structure and lack of microscopic deformation, it does not experience excessive stress due to structural misalignment, maintaining a complete seal at all times. Compared to the problem of traditional single-layer sealants being prone to cracking and failure under long-term high shear stress, this structure's double-layer sealant is in a low-stress stable state, significantly improving sealing durability and providing long-term protection for the vehicle body's sealing performance, eliminating the need for seal failure and leak repairs during later use.

[0062] The sealing component 5 of this invention abandons the simple design of a traditional single adhesive layer and adopts a two-layer split layout of inner sealant 51 and outer sealant 52 to form a fully enclosed sealing system with internal and external linkage, completely blocking the channels for rainwater and moisture to seep in. The outer sealant 52 is applied to the outside of the second connecting component 4 to form an outer protective sealing layer, covering all external butt joints and weld edges, serving as a second strong protection to prevent external water from directly washing away and penetrating. The two layers of sealing each perform their respective functions, completely solving the problem of failure when the traditional single adhesive layer is damaged, and the sealing reliability is improved by a factor of two.

[0063] According to a second aspect of the present invention, a stamping forming process for a vehicle body corner sealing structure is provided, employing a vehicle body corner sealing structure, such as... Figures 5 to 7 As shown, it includes the following steps:

[0064] The stamping process involves stamping the workpiece of the water tank to obtain a stamped part;

[0065] The drawing process involves drawing and drafting the first flange 41, the second flange 42, and the transition plate 43 of the stamped part to obtain the drawn part. The edge shrinkage is 5mm, and the process supplementary surface 10 is designed. The parting line 20 bends along the product structure.

[0066] The forward trimming process involves trimming 30 pairs of drawn parts along the forward trimming edge line to obtain the trimmed part. The forward trimming edge line 30 is 1010mm away from the process supplement surface. Specifically, this quantitative parameter precisely controls the trimming allowance, avoiding damage to the effective forming surface of the product due to excessively close trimming distance, resulting in insufficient flange width or overlap length. It also prevents material waste and increased difficulty in subsequent secondary trimming due to excessively long trimming distance. Simultaneously, the standardized trimming parameters maximize the offset of sheet metal springback errors, ensuring the fit and alignment accuracy when the water channel plate 2 and the side outer plate 1 are joined. This eliminates problems such as excessive clearance and misalignment caused by trimming dimensional deviations, laying a solid dimensional foundation for subsequent welding and sealing construction.

[0067] The side trimming process involves side-trimming the workpiece along the trimming edge line 40 to obtain a preformed part. The angle between the trimming edge line 40 and the process supplement surface 10 is 75°–105°. Specifically, this angle range covers the optimal trimming angles for vertical and near-vertical edges, adapting to the trimming needs of complex corner contours. This avoids tool interference, excessive trimming burrs, and edge chipping caused by small-angle trimming, while also preventing material stretching deformation caused by large-angle trimming. Compared to the traditional single-edge trimming process, the side trimming process can precisely remove excess process waste at corners, ensuring that the edges of the flange and transition plate 43 are smooth, burr-free, and deformation-free. This improves the product's appearance quality and prevents edge burrs from scratching the sealant layer and affecting the welding tightness, comprehensively ensuring subsequent sealing and connection performance.

[0068] The shaping process involves shaping 50 pairs of preformed parts along the side trimming line to obtain the water trough.

[0069] This invention addresses the complex corner structure composed of the first flange 41, the second flange 42, and the transition plate 43. It simultaneously completes drawing and draft processing during the drawing process, and incorporates the core parameter of the process supplement surface 10 with a 5mm edge shrinkage design. Sufficient material flow allowance is reserved in advance, avoiding excessive material stretching and localized excessive thinning caused by direct drawing at the corner. The process supplement surface 10 is designed with a parting line 20 along the product structure's bend, conforming to the product's own arc and asymmetrical geometric contour, achieving smooth material flow and uniform deformation. This overcomes the stress concentration and material accumulation tearing problems at corners caused by traditional straight parting lines 20, eliminating the core defects of wrinkling, cracking, and hidden cracking in stamping from the process path, significantly improving the sheet metal part forming qualification rate, and reducing the defect rate and rework costs.

[0070] This invention employs a step-by-step forming logic of stamping, drawing, front trimming, side trimming, and shaping, breaking down the complex corner forming, flanging, and trimming processes. This avoids the problems of complex mold structure, high processing difficulty, and cumbersome debugging caused by single-process composite molding. The optimized design of the process supplementary surface 10 and the parting line 20 reduces the processing accuracy requirements and wear rate of the mold surface, reduces mold jamming and sticking problems, extends the service life of stamping dies, and reduces mold development and maintenance costs. At the same time, the step-by-step process is compatible with automated stamping production lines, with low single-process operation difficulty and convenient debugging, enabling rapid and stable batch production and improving overall manufacturing efficiency.

[0071] In one embodiment of the stamping forming process of the vehicle body corner sealing structure of the present invention, the draft angle is increased by 3° to 5° in the drawing process. This setting can significantly reduce the contact friction and clamping force between the inner wall of the sheet metal part and the mold cavity and punch after drawing, fundamentally alleviating the problem of excessive demolding resistance in narrow corner areas. It avoids scratches, dents, and edge damage to the parts surface during demolding caused by traditional small-angle drafting. Especially for thin-walled irregular parts such as the flange of the flow channel plate 2 and the transition plate 43, it can completely eliminate defects such as warping, twisting, and excessive springback caused by demolding pull, ensuring the appearance integrity and structural stability of the sheet metal parts throughout the process, and reducing the scrap of defective products due to poor demolding.

[0072] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A vehicle body corner sealing structure, characterized in that, include: The components include a side panel, a water channel plate, a first connecting assembly, a second connecting assembly, and a sealing assembly, wherein one end of the side panel has an arc-shaped opening. The first connecting assembly includes a connecting sidewall, a connecting ramp, and a side flange. The first side of the connecting sidewall is perpendicularly connected to the side edge of the outer side panel. The second side of the connecting sidewall is connected to the first side of the connecting ramp. The second side of the connecting ramp is connected to the side flange. The second connecting component is disposed at the end of the water trough plate, the side of the water trough plate is connected to the arc-shaped opening of the side outer plate, and the second connecting component is connected to the connecting side wall, the connecting inclined surface and the side flange respectively; The sealing assembly is disposed between the first connecting assembly and the second connecting assembly, and on the outside of the second connecting assembly.

2. The vehicle body corner sealing structure according to claim 1, characterized in that, The second connecting component includes a first flange, a second flange, and a transition plate. The first flange and the second flange are respectively disposed on both sides of the end of the water trough plate. The transition plate is connected to the first flange and the second flange respectively, and the included angle between the transition plate and the second flange is greater than the included angle between the transition plate and the first flange. The inner wall of the first flange is connected to the outer wall of the connecting side wall, the inner wall of the second flange is connected to the outer wall of the side flange, and the inner wall of the transition plate is connected to the outer wall of the connecting slope.

3. The vehicle body corner sealing structure according to claim 2, characterized in that, The first flange is perpendicularly connected to the transition plate.

4. The vehicle body corner sealing structure according to claim 2, characterized in that, The width of the first flange, the width of the second flange, and the width of the transition plate are all at least 15 mm.

5. The vehicle body corner sealing structure according to claim 2, characterized in that, The overlap length between the first flange and the connecting side wall, the overlap length between the second flange and the side flange, and the overlap length between the transition plate and the connecting slope are all at least 12mm.

6. The vehicle body corner sealing structure according to claim 1, characterized in that, The water trough plate has an arc-shaped edge, and an Apras welding point is provided on the arc-shaped edge. The water trough plate and the outer side panel are welded together through the Apras welding point. The distance between two adjacent Apras welding points near the first connecting component is less than 60mm.

7. The vehicle body corner sealing structure according to claim 6, characterized in that, The sealing assembly includes an inner sealant and an outer sealant. The inner sealant is disposed between the first connecting assembly and the second connecting assembly, and the outer sealant is coated on the outside of the second connecting assembly.

8. A stamping forming process for a vehicle body corner sealing structure, employing the vehicle body corner sealing structure as described in any one of claims 1-7, characterized in that, Includes the following steps: The stamping process involves stamping the workpiece of the water tank to obtain a stamped part; The drawing process involves drawing and drafting the first flange, second flange, and transition plate of the stamped part to obtain the drawn part. The edge shrinkage is 5mm, and a process supplement surface is designed. The parting line bends along the product structure. The straightening process involves straightening the drawn part along the straightening edge line to obtain the straightened part, wherein the straightening edge line is 10mm away from the process supplement surface; The side repair process involves performing side repair on the part being repaired along the trimming edge line to obtain a preformed part. The angle between the direction of the trimming edge line and the process supplementary surface is 75° to 105°. The shaping process involves shaping the preform along the side trimming line to obtain the water trough.

9. The stamping forming process of the vehicle body corner sealing structure according to claim 8, characterized in that, In the drawing process, the draft angle is increased by 3° to 5°.

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