A method for forming an automobile outer panel, an automobile outer panel, a door, and an automobile
By designing the arc shape of the R-corner portion of the car outer panel during the drawing process, and utilizing the design of the first and second arc segments, the problems of R-corner warping and unevenness during the flanging process of the car outer panel are solved, thereby improving the forming quality and shortening the design cycle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING CHANGAN AUTOMOBILE CO LTD
- Filing Date
- 2023-09-28
- Publication Date
- 2026-06-19
AI Technical Summary
The outer panels of automobiles are prone to problems such as rounded corner warping and unevenness at non-vertical flange positions, which leads to extended design cycles and is difficult to solve.
The rounded corner of the car body panel is designed during the drawing process. The design of the first and second arc segments solidifies the stress in the rounded corner, reducing stress concentration during the flanging process. The drawing die surface includes the product surface, the process supplement surface, and the blank holder surface to ensure that the rounded corner is less prone to problems during the flanging process.
By solidifying the R-angle stress during the drawing process, stress concentration during the flanging process is reduced, avoiding R-angle warping and unevenness, and shortening the design cycle.
Smart Images
Figure CN117428085B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive technology, and more particularly to a method for forming an automotive outer panel, an automotive outer panel, a car door, and an automotive. Background Technology
[0002] The overall aesthetics of a car depend on its design, and once the design is finalized, the quality of the car's outer panels will directly affect the overall aesthetics.
[0003] The forming of outer panels typically involves processes such as drawing, trimming, and flanging. During the flanging process, especially at non-perpendicular flanging positions, issues such as warping and unevenness of the outer panel's round corners (R-corners) can easily occur. To eliminate the problem of uneven outer panel R-corners, repeated adjustments are required during the later mold debugging stage, resulting in a long design cycle. Summary of the Invention
[0004] This application provides a method for forming an automotive outer panel, an automotive outer panel, a car door, and an automotive vehicle, to at least solve the problem of uneven radius corners (R-angles) in non-perpendicular flange locations. The technical solution of this application is as follows:
[0005] A method for forming an automotive outer panel, comprising:
[0006] The outer panel of the car is drawn, and during the drawing process, a portion of the outer panel is bent to form part of the radius (R) of the outer panel.
[0007] The outer panel of the car is flanged to form the rounded corners of the outer panel as a whole.
[0008] Based on the above technical means, by designing a portion of the radius (R) of the outer car body panel in the drawing process, the stress at the radius (R) of the outer car body panel can be solidified during the flanging process. This can eliminate the problem of uneven flanging radius (R) caused by the stress concentrating at the radius (R) of the flanging during the shaping process of the flanging angle during the subsequent flanging process.
[0009] Furthermore, before drawing the outer panel of the car and bending a portion of the outer panel during the drawing process to form part of the radius (R) of the outer panel, a drawing die surface is designed, which includes a product surface and a process supplement surface connected in sequence.
[0010] The process of drawing an outer panel of a car, and bending a portion of the outer panel during the drawing process to form a portion of the radius (R) of the outer panel, includes:
[0011] The drawing process supplements the surface to form the first arc segment;
[0012] The bending direction of the first arc segment is opposite to the bending direction of the R-angle of the car's outer panel, and the portion between the first arc segment and the product surface forms a part of the R-angle of the car's outer panel.
[0013] Based on the above technical means, the R-corner part of the automobile outer panel product is designed in the drawing process, so that the stress in the R-corner part of the automobile outer panel is solidified. Then, in the subsequent flanging process, the stress concentration of the flanging process has a reduced impact on the R-corner position, thus making it less likely for the R-corner to be uneven.
[0014] Furthermore, the process of drawing the outer panel of the automobile, and bending a portion of the outer panel during the drawing process to form a portion of the radius (R) of the outer panel, includes:
[0015] The drawing process adds a second arc segment to the surface.
[0016] The second arc segment is located at the end of the first arc segment that is furthest from the product surface, and the bending direction of the second arc segment is opposite to that of the first arc segment.
[0017] According to the above technical means, when a portion of the automotive outer panel's radius (R-corner) is formed between the first arc segment and the product surface, a second arc segment is formed on the process supplement surface, and the second arc segment is located at the end of the first arc segment furthest from the product surface. In the subsequent flanging process, the second arc segment can share some of the stress at the automotive outer panel's R-corner position, thereby avoiding the problem of uneven R-corner formation due to stress affecting the R-corner's shape.
[0018] Furthermore, the radius of the first arc segment is R1, where R1 ≥ 5 mm.
[0019] Based on the above technical means, a value of R1 greater than 5mm can ensure that the flanged surface is warped or uneven in the subsequent flanged process.
[0020] Furthermore, the radius of the second arc segment is R2, where R2 ≥ 5 mm.
[0021] According to the above technical means, an R2 value greater than 5mm can ensure that the flanged surface is warped or uneven in the subsequent flanged process.
[0022] Furthermore, the arc length of the radius (R) of the outer plate is L1; the arc length of a portion of the radius (R) of the outer plate designed during the drawing process is L2; where L2 / L1≥0.5.
[0023] Based on the above technical means, the more R-angles of the outer car body are formed after the drawing process, the less impact the subsequent flanging process will have on the R-angles of the outer car body.
[0024] Furthermore, one end of the first arc segment and one end of the second arc segment are connected, and the tangents at the connection point coincide.
[0025] According to the above technical means, since the tangents at the connection points of one end of the first arc segment and one end of the second arc segment coincide, it can be ensured that the second arc segment can share the stress at the R-angle of the outer panel of the car during the flanging process.
[0026] An automotive outer panel is manufactured by the aforementioned automotive outer panel forming method.
[0027] A type of car door, including the outer panel of a car.
[0028] A type of automobile, including doors.
[0029] The beneficial effects of this application are:
[0030] (1) This application improves the drawing process so that a portion of the R-corner of the outer car panel is formed in the drawing process, so that the stress of the formed R-corner is solidified. In the subsequent flanging process, since the stress of the formed R-corner is solidified, the influence of stress concentration on the R-corner position of the outer car panel is small or eliminated during the flanging process, thereby avoiding the problem of warping and unevenness at the R-corner of the outer car panel and solving the problem of uneven R-corner. Attached Figure Description
[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.
[0032] Figure 1 This is a schematic diagram of the structure of an automotive outer panel in related technologies;
[0033] Figure 2 This is one of the schematic diagrams of the automotive outer panel forming process in related technologies;
[0034] Figure 3 This is the second schematic diagram of the automotive outer panel forming process in related technologies;
[0035] Figure 4 This is the third schematic diagram of the automotive outer panel forming process in related technologies;
[0036] Figure 5 for Figure 1 Enlarged view of point a in the middle;
[0037] Figure 6 This is a structural schematic diagram of the outer body panel provided in this application;
[0038] Figure 7 for Figure 6 Enlarged view of point b in the middle;
[0039] Figure 8 One of the schematic diagrams of the forming process of the automobile outer panel forming method provided in this application;
[0040] Figure 9 This is the second schematic diagram of the molding process of the automobile outer panel molding method provided in this application;
[0041] Figure 10 This is the third schematic diagram of the molding process for the automobile outer panel molding method provided in this application.
[0042] Among them, 100-automotive outer panel; 1-process supplementary surface; 2-product surface; 11-first arc segment; 12-second arc segment. Detailed Implementation
[0043] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.
[0044] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0045] Cars are one of the most important means of transportation in people's daily lives. Nowadays, with economic development and improved living standards, people's requirements for cars are not only about performance, but also about appearance and overall aesthetics.
[0046] The overall aesthetics of a car depend on its design; once the design is finalized, the quality of the car's outer panels directly affects the overall appearance. For example... Figure 1 As shown, Figure 1 This is a schematic diagram of an automotive outer panel 100. The forming of an automotive outer panel 100 typically involves processes such as drawing, trimming, and flanging. (See also...) Figures 2 to 4 , Figures 2 to 4 This is a schematic diagram of the forming of an automotive outer panel 100 in related technologies.
[0047] In previous related technologies, the drawing die surface was designed during drawing, and the drawing die surface included a process supplementary surface 1 and a product surface 2 connected in sequence (see...). Figure 1 Among them, the process supplementary surface is the shaped area designed between the pressing surface of the automotive outer panel and the product surface during process design.
[0048] Typically, the drawing process involves drawing W (see drawing process). Figure 5 , Figure 5 for Figure 1(Enlarged view at point a) The overdrawing amount W is 0.5-2mm, and the overdrawing fillet radius is 5-6mm. This design method fails to form the product in the drawing process and needs to be completed in the subsequent flanging process.
[0049] During the flanging process, especially at non-perpendicular flanging positions, problems such as warping of the outer panel's radius corners and uneven surface are prone to occur (see...). Figure 4 ),Depend on Figure 4 It is evident that traditional outer panel processing technology is prone to warping and unevenness at the outer panel's radius (R) corners, resulting in irregular R corners on the car's outer panel. To solve this problem, a long adjustment period is required during the later mold debugging stage, leading to excessively long design cycles and sometimes even failing to resolve the issue of irregular outer panel R corners.
[0050] To address the issue of uneven radius (R) angles at non-perpendicular flange locations, this application provides a method for forming automotive outer panels, which mainly includes the following steps:
[0051] The outer panel of the car is drawn, and a portion of the arc shape of the R-angle of the outer panel is designed during the drawing process;
[0052] The outer panel of the car is flanged to form the rounded corner.
[0053] It should be noted that designing a portion of the radius (R) of the outer plate during the drawing process can solidify the stress at the R-corner position during the flanging process. This can eliminate the problem of uneven flanging R-corners caused by stress concentration at the R-corner position during the forming process of the flanging angle in subsequent flanging processes.
[0054] Furthermore, when drawing automotive outer panels, the drawing die surface design includes the product surface, the process supplement surface, and the blank holder surface connected in sequence.
[0055] The outer panel of the automobile is drawn, and during the drawing process, a portion of the arc length of the radius (R) of the outer panel is designed, including:
[0056] When drawing the outer panel of an automobile, the drawing process supplements the surface to form the first arc segment.
[0057] In this design, the bending direction of the first arc segment is opposite to the bending direction of the radius (R-angle), and a portion of the radius (R-angle) of the outer panel is formed between the first arc segment and the product surface. This allows the stress at the radius (R-angle) of the outer panel to be solidified, thereby eliminating the problem of stress concentration causing unevenness of the radius (R-angle) during subsequent flanging processes.
[0058] Furthermore, the process of drawing the outer panel of the automobile, and designing a portion of the radius (R) of the outer panel during the drawing process, also includes:
[0059] During the drawing process of automotive outer panels, a second arc segment is formed on the supplementary surface of the drawing process.
[0060] The second arc segment is located at the end of the first arc segment furthest from the process supplement surface, and the bending direction of the second arc segment is opposite to that of the first arc segment. This second arc segment can share the stress on the R-corner of the outer panel, preventing excessive stress on the R-corner of the outer panel during the flanging process, which could lead to damage to the outer panel.
[0061] As can be seen from the above, this application provides a method for forming an automotive outer panel. The automotive outer panel forming method provided by this application improves the drawing sequence, which is different from the over-drawing method in related technologies.
[0062] This application provides a method for forming an automotive outer panel, which improves the drawing process to solve quality problems such as warping and unevenness of the R-corner of the automotive outer panel due to stress concentration and other factors during the flanging process.
[0063] like Figure 6 As shown, Figure 6 This is a schematic diagram of the automotive outer panel 100. Please refer to [link / reference] for further details. Figure 7 , Figure 7 for Figure 6 Enlarged view at point b. The automotive outer panel forming method provided in this application improves the drawing process. A first arc segment 11 and a second arc segment 12 are formed on the process supplement surface 1, thereby allowing the process supplement surface 1 to be designed with a partial arc shape of the R-angle of the automotive outer panel. Furthermore, a step is formed at the junction of the first arc segment 11 and the second arc segment 12, with a step depth of H.
[0064] It should be noted that the tangent at the junction of the first arc segment 11 and the second arc segment 12 is parallel to the product surface 2 on the side of the outer car panel whose radius of curvature (R-angle) is away from the first arc segment 11. The aforementioned step depth H is the distance between the tangent at the junction of the first arc segment 11 and the second arc segment 12 and the product surface 2 on the side of the outer car panel whose radius of curvature is away from the first arc segment 11. Furthermore, the greater the depth H after the drawing process, the smaller the impact of stress concentration and other factors on the radius of curvature of the outer car panel during the subsequent flanging process.
[0065] This ensures that the radius (R) of the outer panel of the car is cured after the drawing process, thereby eliminating the impact of stress concentration on the R-corner during the subsequent flanging process. This also avoids problems such as warping or unevenness of the R-corner after flanging.
[0066] In some embodiments, the radius of the first arc segment is R1, and the radius of the second arc segment is R2. Further, R1 and R2 satisfy: R1≥5mm, R2≥5mm. The values of R1 and R2 being greater than 5mm can ensure that the flanged surface is warped or uneven in the subsequent flanged process.
[0067] In other embodiments, the arc length of the radius (R) of the outer plate is L1. It should be noted that L1 refers to the arc length of the outer plate after the radius (R) is formed. Based on this, the arc length of a portion of the radius (R) of the outer plate designed during the drawing process is L2 (see...). Figure 7 Where L2 / L1 ≥ 0.5. In this case, that is, when L1 and L2 satisfy L2 / L1 ≥ 0.5, a portion of the radius (R) of the outer panel has already solidified after drawing, and even if the subsequent flanging angles are inconsistent, there will be no problem with the outer panel's R-corner being uneven. Furthermore, it's easy to understand that the larger the value of L2 / L1, the smaller the influence of stress and other factors on the R-corner of the automotive outer panel during the subsequent flanging process. This is because a larger value of L2 / L1 indicates a longer arc length of L2 after the drawing process, meaning more of the automotive outer panel's R-corner is formed during the drawing process. Thus, the more R-corner portion formed during the drawing process, the smaller the influence of stress and other factors on the R-corner during the flanging process.
[0068] See Figures 8 to 10 , Figures 8 to 10 For the automobile outer panel forming method provided in this application, the forming process of the automobile outer panel 100 is described in [reference needed]. Figure 4 and Figure 10 It is evident that the automotive outer panel forming method provided in this application can solve the problem of uneven R-angles that easily occur during the flanging process of the automotive outer panel 100, especially the problem of uneven R-angles that occur during non-perpendicular flanging.
[0069] In some embodiments, one end of the first arc segment 11 and one end of the second arc segment 12 are connected, and the tangents at the connection point coincide. Since the tangents at the connection point of one end of the first arc segment and one end of the second arc segment coincide, it can be ensured that the second arc segment can share the stress at the R-angle of the outer corner of the car body during the flanging process.
[0070] This application also provides an automotive outer panel, which is manufactured by the above-described automotive outer panel forming method.
[0071] This application also provides a vehicle door, including the aforementioned vehicle outer panel.
[0072] This application also provides a vehicle, including the aforementioned door.
[0073] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A method for forming an automotive outer panel, characterized in that, include: The outer panel of the car is drawn, and during the drawing process, a portion of the outer panel is bent to form a portion of the radius (R) of the outer panel. The outer panel of the car is flanged to form the R-angle of the outer panel as a whole; Before drawing the outer panel of the automobile and bending a portion of the outer panel during the drawing process to form a portion of the radius (R) of the outer panel, a drawing die surface is designed, which includes a product surface and a process supplement surface connected in sequence. The drawing process supplements the surface to form a first arc segment; Wherein, the bending direction of the first arc segment is opposite to the bending direction of the R-angle of the outer car panel; the portion between the first arc segment and the product surface forms a part of the R-angle of the outer car panel; The drawing process supplements the surface to form a second arc segment; Wherein, the second arc segment is located at the end of the first arc segment away from the product surface, and the bending direction of the second arc segment is opposite to the bending direction of the first arc segment; The arc length of the radius (R) of the outer corner of the vehicle body is L1; In the process of drawing the outer panel of the automobile and bending a portion of the outer panel during the drawing process to form a portion of the radius (R) of the outer panel, the arc length of the portion of the radius (R) of the outer panel is L2; wherein, L2 / L1≥0.
5.
2. The method for forming an automotive outer panel according to claim 1, characterized in that, The radius of the first arc segment is R1; R1 ≥ 5mm.
3. The method for forming an automotive outer panel according to claim 1, characterized in that, The radius of the second arc segment is R2; R2 ≥ 5mm.
4. The method for forming an automotive outer panel according to claim 1, characterized in that, One end of the first arc segment is connected to one end of the second arc segment, and the tangents at the connection point coincide.
5. An automotive outer panel, characterized in that, Made by the automobile outer panel forming method according to any one of claims 1-4.
6. A vehicle door, characterized in that, Includes the automotive outer panel as described in claim 5.
7. A car, characterized in that, Includes the vehicle door as described in claim 6.