A stamping method for automobile fender outer panel

Abstract

This application relates to a stamping method for an automotive fender outer panel, comprising the following steps: performing a flanging and shaping process on an intermediate automotive fender outer panel part obtained after a drawing process and an outer contour trimming process to obtain a semi-finished automotive fender outer panel; performing a wedge flanging and punching process on the semi-finished automotive fender outer panel to obtain a finished automotive fender outer panel; wherein, the flanging and shaping process includes: dividing the headlight side into a wedge flanging section on the near hood side, a cross-cut composite section, and a vertical flanging section on the far hood side arranged sequentially; performing wedge flanging on the wedge flanging section on the near hood side, performing vertical flanging on the vertical flanging section on the far hood side, and performing wedge flanging and vertical flanging sequentially on the cross-cut composite section. This application solves the problems in the prior art where the investment cost of parts is high and the manufacturing cost is large due to the large number of stamping processes, and the more stamping processes there are, the greater the risk of positioning accuracy of parts, which can easily lead to poor product quality.

Description

Technical Field

[0001] This application relates to the field of automotive parts manufacturing technology, and in particular to a stamping method for an outer fender panel of an automobile. Background Technology

[0002] The fender is an important exterior component of a car, primarily used to enhance the vehicle's styling, conceal irregular internal structural parts, protect pedestrians from collisions, protect the vehicle from mud, rain, snow, and debris that could damage surrounding components, and reduce air resistance. Depending on the car's design, various fender types are used. This component has a complex structure and numerous interlocking relationships with surrounding parts, making it a crucial component that tests the stamping process's capabilities.

[0003] Some related technologies provide automotive fender outer panels (taking the left part as an example), such as Figure 1 As shown, the sharp corner of the headlight end 5 on the side of the hood of this part ( Figure 1 The middle elliptical dotted circle) is narrow and long, and the front door is concave near the side wall overlap side 8 ( Figure 1 The large arc of the dotted circle (in the middle) and the complex structure on the door sill side, with a U-shaped mounting notch 20 in the Z direction of the vehicle coordinate system, the wheel arch area is the exterior surface, and the wheel arch area has a mounting hole 13 on the upper part of the wheel arch with a negative angle in the Y direction of the vehicle coordinate system. There is a camera mounting hole 22 near the middle of the front door on the exterior surface. There is a negative angle in the Y direction of the vehicle coordinate system at the water channel 6 on the side of the hood. There is a fender reinforcement plate mounting hole 16 near the front of the headlight on the hood. The mounting hole 21 at the front bumper is perpendicular to the Y axis of the vehicle coordinate system. This part has a sharp shape, novel structure, and extremely high requirements for craftsmanship.

[0004] The car features a novel, sharply styled segmented structure for the front fender, headlights, and front bumper. The narrow, pointed front end is prone to deformation, so a fender reinforcement plate has been incorporated to prevent deformation. Therefore, mounting holes for the fender reinforcement plate are designed on the fender near the front of the headlights on the hood. The front bumper is not mounted in the traditional Y-axis direction, but rather perpendicular to the Y-axis, with the holes on its mounting surface also perpendicular to the Y-axis.

[0005] Conventional stamping forming of fender outer panel parts mainly involves processes such as drawing, trimming and punching, flanging and shaping with wedge flanging, wedge flanging and punching with wedges, and wedge punching. For the aforementioned automotive fender outer panel parts, some existing technologies employ five stamping processes to complete the manufacturing of the fender outer panel parts: drawing, trimming and wedge flanging with partial holes, flanging and shaping with wedges, side punching of partial holes with flanging and wedge flanging with partial holes, and wedge punching of the remaining holes.

[0006] This solution breaks down the work processes of each part of the automotive fender outer panel component into smaller, segmented steps, reducing the complexity of the manufacturing process. If the fender outer panel component were produced using the aforementioned five processes, the breakdown of each process would result in higher investment costs and manufacturing expenses due to the increased number of stamping steps. Furthermore, the more stamping steps involved, the greater the risk to the part's positioning accuracy, potentially leading to poor product quality. Summary of the Invention

[0007] This application provides a stamping method for an outer fender of an automobile, which solves the problems of high part manufacturing cost, high risk of part positioning accuracy, and easy to cause poor product quality in the related technology that uses five processes.

[0008] This application provides a stamping method for an outer fender of an automobile, which includes the following steps:

[0009] The intermediate part of the outer fender of the car is obtained by the drawing process and the outer contour trimming process. The fender forming process is carried out to obtain the semi-finished car fender.

[0010] The semi-finished automobile fender outer panel is subjected to a wedge flanging and shaping process and a wedge punching process to obtain the finished automobile fender outer panel;

[0011] The flanging and shaping process includes: dividing the headlight side into a near-mounted hood side oblique wedge flanging section, a cross-cut composite section, and a far-mounted hood side vertical flanging section arranged sequentially; performing oblique wedge flanging on the near-mounted hood side oblique wedge flanging section; performing vertical flanging on the far-mounted hood side vertical flanging section; and performing oblique wedge flanging and vertical flanging on the cross-cut composite section sequentially.

[0012] In some embodiments, the length of the cross-cutting composite section is not less than a first design value.

[0013] In some embodiments, the first design value is 50 mm.

[0014] In some embodiments, the flanging and shaping process further includes:

[0015] Apply a wedge-shaped flange to the headlight end on the side of the hood;

[0016] And / or, perform a wedge flange on the side water channel of the hood;

[0017] And / or, perform a wedge flange on the side circumference of the hood;

[0018] And / or, perform pre-vertical flanging on the overlapping side of the side panel;

[0019] And / or, perform pre-vertical flanging on the front door side;

[0020] And / or, perform a vertical flange on the threshold side;

[0021] And / or, vertically flange the wheel arch area and wedge punch some holes to form mounting holes at the bottom of the wheel arch;

[0022] And / or, perform a vertical flange on the overlapping side of the front bumper.

[0023] In some embodiments, the wedge flanging and shaping wedge punching process includes:

[0024] A wedge-shaped punch is made at the headlight end on the side of the hood to form mounting holes for the fender reinforcement plate;

[0025] And / or, make oblique wedge punches at the side water channel of the hood to form snap-fit ​​holes, installation tightening holes and installation positioning holes, and finely trim the outer contour edge;

[0026] And / or, perform a wedge flange on the overlapping side of the side panel;

[0027] And / or, perform a wedge flange on the front door side;

[0028] And / or, make a wedge punch on the sill side to form an installation notch;

[0029] And / or, make a wedge punch on the overlapping side of the front bumper to form a mounting hole for the front bumper.

[0030] In some embodiments, the outer contour trimming process includes:

[0031] Perform vertical trimming on the side of the headlights;

[0032] And / or, perform bevel trimming on the headlight end of the hood;

[0033] And / or, perform rough vertical trimming on the outer contour of the side water channel of the hood;

[0034] And / or, perform bevel trimming on the side edges of the hood;

[0035] And / or, perform vertical trimming on the outer contour of the side panel overlap;

[0036] And / or, perform vertical trimming on the outer contour of the front door side;

[0037] And / or, vertically trim the outer contour of the wheel arch area and vertically punch partial holes to form upper wheel arch mounting holes and middle wheel arch mounting holes;

[0038] And / or, perform vertical trimming on the outer contour of the front bumper overlap side;

[0039] And / or, for the intermediate face punch camera mounting hole.

[0040] In some embodiments, the drawing process includes:

[0041] Process compensation is performed on the raw material of the outer fender of the automobile to form the blanking surface and draw beads, and to determine the parting line.

[0042] In some embodiments, a wedge flanging die is used for wedge flanging.

[0043] In some embodiments, the wedge-shaped flange mold includes a fixed punch and a movable punch located below the fixed punch, wherein the fixed punch and the movable punch are fitted together to form a dividing line;

[0044] In the area covered by the dividing line, the thinnest part of the fixed punch is located at the sharp corner of the fixed punch, and the thickness of the sharp corner is not less than the second design value.

[0045] In the area covered by the dividing line, the thickness of the thinnest part of the movable punch is not less than the third design value;

[0046] The distance between the pointed end of the fixed punch and the pointed end of the movable punch is not less than the fourth design value.

[0047] In some embodiments, the second design value is 10 mm;

[0048] And / or, the third design value is 15mm;

[0049] And / or, the fourth design value is 40mm.

[0050] The beneficial effects of the technical solution provided in this application include:

[0051] The stamping method for the outer fender of an automobile provided in this application divides the headlight side into three sequentially arranged regions: a near-hood side wedge-flanged section, a cross-cut composite section, and a far-hood side vertical flanged section. The near-hood side wedge-flanged section is wedge-flanged, the far-hood side vertical flanged section is vertically flanged, and the cross-cut composite section is sequentially wedge-flanged and vertically flanged. By setting overlapping areas to perform the cross-cut treatment of wedge-flanging and vertical flanging, it is ensured that the flanging on the headlight side can be completed entirely in the third flanging and shaping process. This provides sufficient space for the subsequent fourth process, wedge-flanging shaping and wedge-punching, thus achieving the goal of stamping the outer fender of an automobile only requiring four processes: drawing, outer contour trimming, flanging and shaping, and wedge-flanging shaping and wedge-punching.

[0052] Compared to existing technologies where the headlight side wedge flanging and vertical flanging are completed in two processes, leading to an increase in the number of processes, this application completes the flanging around the headlight side of the fender in the third process, leaving space for the wedge punching at the front bumper and the front end of the hood in the fourth process. This reduces the fender outer panel parts that require five processes in the traditional process to four processes. It solves the problems of high investment costs and manufacturing expenses in existing technologies due to the large number of stamping processes, and the increased risk of positioning accuracy issues due to the increased number of stamping processes, which can easily lead to poor product quality. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the outer fender structure of an automobile in related technologies.

[0055] Figure 2 A schematic diagram of the structure of the raw material for the outer fender of an automobile after the drawing process, as provided in the embodiments of this application;

[0056] Figure 3 A schematic diagram of the structure of the intermediate part of the outer panel of a car fender obtained after the outer contour trimming process, provided for an embodiment of this application;

[0057] Figure 4 A schematic diagram of the semi-finished automotive fender outer panel structure obtained after the flanging and shaping process, provided for an embodiment of this application;

[0058] Figure 5 This is a schematic diagram of the headlight side provided in an embodiment of this application;

[0059] Figure 6 A schematic diagram of the outer structure of an automobile fender after the wedge flanging and shaping process and the wedge punching process provided in this application embodiment;

[0060] Figure 7 for Figure 6 A bottom view;

[0061] Figure 8 This is a schematic diagram of the wedge flange mold structure provided in the embodiments of this application.

[0062] In the diagram: 1. Headlight side; 2. Near-hood side inclined wedge flange section; 3. Cross-cut composite section; 4. Far-hood side vertical flange section; 5. Hood side headlight end; 6. Hood side water channel; 7. Hood side side panel end; 8. Side panel overlap side; 9. Front door side; 10. Door sill side; 11. Wheel arch area; 12. Front bumper overlap side; 13. Upper wheel arch mounting hole; 14. Middle wheel arch mounting hole; 15. Lower wheel arch mounting hole; 16. Fender reinforcement plate mounting hole; 17. Clip hole; 18. Mounting tightening hole; 19. Mounting positioning hole; 20. Mounting notch; 21. Front bumper mounting hole; 22. Camera mounting hole; 23. Fixed punch; 24. Movable punch; 25. Parting line; 26. Blanking surface; 27. Draw bead; 28. Parting line. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0064] This application provides a stamping method for an outer fender of an automobile, which can solve the problems in related technologies where the five-process method results in high part manufacturing costs, high risk of part positioning accuracy issues, and easy occurrence of poor product quality.

[0065] This application provides a stamping method for an outer fender of an automobile, which includes the following steps:

[0066] 101: Combined with Appendix Figure 2 , Figure 3 and Figure 4 As shown, the intermediate part of the outer fender of the car is subjected to a flanging and shaping process after the drawing process and the outer contour trimming process to obtain the semi-finished car fender.

[0067] There are usually two outer fender panels on a car, and these two outer fender panels are chirally symmetrical, referred to as the left panel and the right panel, and are installed on the left and right sides of the vehicle, respectively. See [link / reference]. Figure 3As shown, taking the left part as an example, the outer contour of the car fender is divided into twelve parts: headlight side 1, hood side headlight end 5, hood side water channel 6, hood side side wall end 7, side wall overlap side 8, front door side 9, sill side 10, wheel arch area 11, and front bumper overlap side 12. The headlight side 1, hood side headlight end 5, hood side water channel 6, hood side side wall end 7, side wall overlap side 8, front door side 9, sill side 10, wheel arch area 11, and front bumper overlap side 12 are connected in a clockwise direction.

[0068] The headlight side 1 is biased towards the headlight and can be connected to the headlight later. The headlight end 5 on the hood side is biased towards the hood and can be connected to the hood later.

[0069] Among them, see Figure 5 As shown, the flanging and shaping process includes: dividing the headlight side 1 into three areas arranged sequentially: a near-mounted hood side wedge flanging section 2, a cross-cut composite section 3, and a far-mounted hood side vertical flanging section 4. Specifically, the near-mounted hood side wedge flanging section 2 is wedge flanged, the far-mounted hood side vertical flanging section 4 is vertical flanged, and the cross-cut composite section 3 is wedge flanged and vertical flanged sequentially.

[0070] 102: See also Figure 6 and Figure 7 As shown, the semi-finished car fender outer panel is subjected to a wedge flanging and wedge punching process to obtain the finished car fender outer panel.

[0071] The stamping method for the outer fender of an automobile provided in this application divides the headlight side 1 into three sequentially arranged regions: a near-hood side wedge-flanged section 2, a cross-cut composite section 3, and a far-hood side vertical flanged section 4. The near-hood side wedge-flanged section 2 is wedge-flanged, the far-hood side vertical flanged section 4 is vertically flanged, and the cross-cut composite section 3 is sequentially wedge-flanged and vertically flanged. By setting overlapping areas to perform the cross-cut treatment of wedge-flanging and vertical flanging, it is ensured that the flanging of the headlight side 1 can be completed entirely in the third flanging and shaping process. This provides sufficient space for the subsequent fourth process, wedge-flanging and shaping with wedge punching, thus achieving the goal of stamping the outer fender of an automobile only requiring four processes: drawing, outer contour trimming, flanging and shaping, and wedge-flanging and shaping with wedge punching.

[0072] Compared to existing technologies where the headlight side wedge flanging and vertical flanging are completed in two processes, leading to an increase in the number of processes, this application completes the flanging around the headlight side of the fender in the third process, leaving space for the wedge punching at the front bumper and the front end of the hood in the fourth process. This reduces the fender outer panel parts that require five processes in the traditional process to four processes. It solves the problems of high investment costs and manufacturing expenses in existing technologies due to the large number of stamping processes, and the increased risk of positioning accuracy issues due to the increased number of stamping processes, which can easily lead to poor product quality.

[0073] To ensure the quality of the flanging on the outer fender of the car fender, the transition between the wedge flanging and the vertical flanging must be gradual. This places certain requirements on the length of the intersection section 3. For example, see [reference needed]. Figure 5 As shown, the length L1 of the cross-cutting composite section 3 is not less than the first design value. The first design value can be determined by multiple trial processing, production experience, or model simulation.

[0074] Furthermore, as an example, the first design value is 50mm. That is to say, in order to ensure the flanging quality of the outer flanging of the car fender, the intersection of the wedge flanging and the vertical flanging needs to be transitioned slowly, and the length L1 of the intersection composite section 3 is not less than 50mm.

[0075] In step 101 above, the third step, the flanging and shaping step, mainly involves flanging and shaping. Specifically, in addition to flanging the headlight side 1 as described above, the flanging and shaping step also includes:

[0076] The headlight end 5 on the hood side is flared with a wedge, the water channel 6 on the hood side is flared with a wedge, the side wall end 7 on the hood side is flared with a wedge, the side wall overlap side 8 is pre-vertically flared, the front door side 9 is pre-vertically flared, the door sill side 10 is vertically flared, the wheel arch area 11 is vertically flared and wedge punched with some holes to form the lower wheel arch mounting hole 15; the front bumper overlap side 12 is vertically flared.

[0077] It should be noted that the pre-vertical flanging of the overlapping side 8 and the front door side 9 was not completed in the fourth process. This is because the flanging was interfered with during the actual stamping process in the third process, making it impossible to complete the flanging in one step. Therefore, the flanging was completed in two steps. Although the flanging was completed in two steps, the stamping of the outer fender of the car can still be achieved in the fourth process.

[0078] The completion of the aforementioned work on the wedge flanges at the headlight end 5, the water channel at the side of the hood 6, and the side circumference end 7 of the hood in one go also leaves space for the wedge punching at the headlight end of the hood, ensuring the completion of the process.

[0079] In step 102 above, see Figure 6 and Figure 7 As shown, the fourth process, the wedge flanging and shaping, and the wedge punching process, includes:

[0080] A wedge punch is made on the headlight end 5 on the hood side to form the fender reinforcement plate mounting hole 16; a wedge punch is made on the water channel 6 on the hood side to form the snap hole 17, the installation tightening hole 18 and the installation positioning hole 19, and the outer contour edge is finely trimmed; a wedge flange is made on the side panel overlap side 8; a wedge flange is made on the front door side 9; a wedge punch is made on the sill side 10 to form the installation notch 20; a wedge punch is made on the front bumper overlap side 12 to form the front bumper mounting hole 21. Since a vertical flange was made in the third process, the wedge punching at this time ensures that the front bumper mounting hole 21 is perpendicular to the Y-axis.

[0081] In step 101 above, see Figure 3 As shown, the second process, the outer contour trimming process, includes:

[0082] Vertical trimming is performed on the headlight side 1; bevel trimming is performed on the headlight end 5 on the hood side; rough vertical trimming is performed on the outer contour of the water channel 6 on the hood side; bevel trimming is performed on the side wall end 7 on the hood side; vertical trimming is performed on the outer contour of the side wall overlap side 8; vertical trimming is performed on the outer contour of the front door side 9; vertical trimming is performed on the outer contour of the wheel arch area 11 and vertical punching is performed to form the upper wheel arch mounting hole 13 and the middle wheel arch mounting hole 14; vertical trimming is performed on the outer contour of the front bumper overlap side 12; camera mounting hole 22 is punched on the middle face.

[0083] For many car models, the front camera is either standard or optional. Therefore, depending on the actual situation, the camera mounting hole 22 on the middle surface can be punched or not. Considering the diversity of configurations in the process design, preferably, the camera mounting hole 22 is punched on the middle surface in the second process of outer contour trimming.

[0084] In step 101 above, see Figure 2 As shown, the first process, the drawing process, includes:

[0085] Process compensation is performed on the raw material of the outer fender of the automobile to form the blanking surface 26 and the draw bead 27, and to determine the parting line 28.

[0086] Specifically, based on the part's shape and forming characteristics, the minimum drawing depth of the part can be comprehensively evaluated, a suitable stamping direction can be selected to set the coordinate system of the drawing process, process compensation can be performed on the part, and blank holders, draw beads, parting lines, etc. can be set.

[0087] This application also provides a wedge flanging mold for wedge flanging.

[0088] Specifically, see Figure 8 As shown, the wedge-shaped flange mold includes a fixed punch 23 and a movable punch 24 located below the fixed punch 23. After the fixed punch 23 and the movable punch 24 are fitted together, a dividing line 25 is formed. In the area of ​​the fixed punch 23 covered by the dividing line 25, the thinnest part is located at the pointed end of the fixed punch 23, and the thickness of the pointed end is not less than a second design value. In the area of ​​the movable punch 24 covered by the dividing line 25, the thinnest part is not less than a third design value. The distance from the pointed end of the fixed punch 23 to the pointed end of the movable punch 24 is not less than a fourth design value.

[0089] The purpose of designing the second, third, and fourth design values ​​is to ensure that the mold has sufficient strength and that the part product is realized through four processes.

[0090] The second, third, and fourth design values ​​can be determined based on multiple trial processing steps, production experience, or model simulation.

[0091] As an example, the second design value L2 is 10mm, the third design value L3 is 15mm, and the fourth design value L4 is 40mm. This ensures that the entire mold has sufficient strength and service life.

[0092] In summary, this application achieves a certain balance by optimizing the content of each process and rationally designing the parting lines of local structures, ensuring the four-process manufacturing of the extra-long fender outer panel part. From the perspective of process and mold design, this process method is effective throughout the entire process, ensuring the compositeness of part production and product quality, and greatly reducing production costs.

[0093] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0094] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0095] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method of stamping an outer panel of an automobile fender, characterized by, It comprises the following steps: The outer panel of the automobile fender outer panel intermediate part obtained after the drawing process and the outer contour trimming process is subjected to a flanging shaping process to obtain an automobile fender outer panel semi-finished product; The automobile fender outer panel semi-finished product is subjected to a wedge flanging shaping wedge punching process to obtain a finished automobile fender outer panel; The flanging shaping process comprises: dividing the headlamp side (1) into a near-hood-side wedge flanging section (2), a cross-cutter composite section (3) and a far-hood-side vertical flanging section (4) arranged in sequence, wedge flanging the near-hood-side wedge flanging section (2), vertical flanging the far-hood-side vertical flanging section (4), and sequentially wedge flanging and vertical flanging the cross-cutter composite section (3).

2. The method of claim 1, wherein: The length of the cross-cutter composite section (3) is not less than a first design value.

3. The method of claim 2, wherein: The first design value is 50mm.

4. The method of claim 1, wherein the fender outer panel is formed by a press process. The flanging shaping process further comprises: Wedge flanging the hood side headlamp end (5); And / or, wedge flanging the hood side gutter (6); And / or, wedge flanging the hood side side wall end (7); And / or, pre-vertical flanging the side wall lap side (8); And / or, pre-vertical flanging the front door side (9); And / or, vertical flanging the rocker side (10); And / or, vertical flanging the wheel arch area (11) and wedge punching part of the hole to form the lower wheel arch mounting hole (15); And / or, vertical flanging the front bumper lap side (12).

5. The method of claim 1, wherein the fender outer panel is formed by a press process. The wedge flanging shaping wedge punching process comprises: Wedge punching the hood side headlamp end (5) to form the fender reinforcement plate mounting hole (16); And / or, wedge punching the hood side gutter (6) to form the buckle hole (17), the installation tightening hole (18) and the installation positioning hole (19), and finishing the outer contour edge; And / or, wedge flanging the side wall lap side (8); And / or, wedge flanging the front door side (9); And / or, wedge punching the rocker side (10) to form the installation gap (20); And / or, wedge punching the front bumper lap side (12) to form the front bumper installation hole (21).

6. The method of claim 1, wherein the fender outer panel is formed by a press process. The outer contour trimming process comprises: Vertical trimming the headlamp side (1); And / or, wedge trimming the hood side headlamp end (5); And / or, rough vertical trimming the outer contour of the hood side gutter (6); And / or, wedge trimming the hood side side wall end (7); And / or, vertical trimming the outer contour of the side wall lap side (8); And / or, vertical trimming the outer contour of the front door side (9); And / or, vertical trimming the outer contour of the wheel arch area (11) and vertically punching part of the hole to form the upper wheel arch mounting hole (13) and the middle wheel arch mounting hole (14); And / or, vertical trimming the outer contour of the front bumper lap side (12); And / or, punching the camera installation hole (22) on the intermediate profile.

7. The method of claim 1, wherein the fender outer panel is formed by a press process. The drawing process comprises: Process compensation is performed on the automobile fender outer panel raw material to form a pressing surface (26) and a drawing rib (27), and a parting line (28) is determined.

8. The method of stamping an outer panel of an automobile fender as set forth in any one of claims 1 to 7, wherein: Wedge flanging is performed using a wedge flanging die.

9. The method of claim 8, wherein: The inclined flanging die comprises a fixed punch (23) and a movable punch (24) below the fixed punch (23), and a boundary line (25) is formed after the fixed punch (23) and the movable punch (24) are attached to each other; In the area covered by the boundary line (25), the thinnest part of the fixed punch (23) is located at the sharp corner end of the fixed punch (23), and the thickness of the sharp corner end is not less than a second design value; In the area covered by the boundary line (25), the thickness of the thinnest part of the movable punch (24) is not less than a third design value; The distance from the sharp corner end of the fixed punch (23) to the sharp corner end of the movable punch (24) is not less than a fourth design value.

10. The stamping method of the automobile fender outer panel according to claim 9, characterized in that: The second design value is 10 mm; And / or, the third design value is 15 mm; And / or, the fourth design value is 40 mm.

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