Method of controlling springback in flanging, flanging process and flanged part

Abstract

The application discloses a method for controlling springback of flanging, a flanging process and a flanged part, and relates to the technical field of stamping processes. The method for controlling springback of flanging comprises the following steps: obtaining a preset target shaping rib parameter; according to the target shaping rib parameter, a shaping rib is pre-pressed at the midpoint of the chord length of the preset flanging inner round corner of a product in the direction perpendicular to the plane where the flanging inner round corner is located, wherein the recessed side of the shaping rib and the recessed side of the flanging inner round corner face the same direction; the product is flanged, and the shaping rib is flattened during the flanging process to obtain a formed part. According to the preset target shaping rib parameter, a shaping rib is pre-pressed at the midpoint of the chord length of the flanging inner round corner in the direction parallel to the preset bending line, and then the shaping rib is flattened during the flanging process. The pre-pressed shaping rib generates a reverse bending moment during the reverse pressing and shaping (i.e. flattening) process, and then at least partially offsets the springback bending moment of the formed part, so that the shaping is stable.

Description

Technical Field

[0001] This application relates to the field of stamping technology, and in particular to a method for controlling the springback of a flange, a flange process, and flanged parts. Background Technology

[0002] In existing technologies, many automotive sheet metal parts (such as A-pillar reinforcements and door frame flanged parts) require a flanged process during production; flanged, simply put, is bending the edge of a sheet metal part at an angle. However, after flanged processing, the formed part often springs back—that is, the bent area springs back slightly, causing a deviation between the final shape and the desired dimensions. The traditional solution is "mold compensation." Simply put, since the product will spring back, the mold is intentionally bent further in the opposite direction so that it springs back to its original position. This method works well for products with simple shapes and uniform springback, but for flanged parts with high curvature, the springback itself is easily affected by slight variations in material batches and mold clearances, making it very unstable. Consequently, mold compensation often cannot fully account for all aspects, and the development cycle is long and the mold modification cost is high. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a method, a flanging process, and a flanging part for controlling the springback of a flanging edge. At the midpoint of the inner fillet chord of the flanging edge, a shaped rib is pre-pressed in a direction parallel to a preset bending line according to preset target shaped rib parameters. Then, during the flanging process, the shaped rib is flattened. The pre-pressed shaped rib generates a reverse bending moment during the back pressing and shaping (i.e., flattening) process, which at least partially cancels out the rebound bending moment of the formed part, thereby stabilizing the forming process.

[0004] The method for controlling the springback of the flange according to the first aspect of this application includes: Obtain the preset target shape reinforcement parameters; According to the target shaping rib parameters, at the midpoint of the preset inner rounded corner chord of the flange, a shaping rib is pre-pressed out in a direction perpendicular to the plane where the inner rounded corner of the flange is located, wherein the concave side of the shaping rib faces the same direction as the concave side of the inner rounded corner of the flange. The product is flanged, and the shaping ribs are flattened during the flanging process to obtain a shaped part.

[0005] The method for controlling the springback of the flange according to the embodiments of this application has at least the following beneficial effects: This application pre-presses ribs onto the product using preset target rib parameters, and then flattens the ribs during the flange-flanging process. Since the ribs generate a reverse bending moment during flattening, this reverse bending moment can at least partially offset the rebound bending moment generated by the flange springback, thereby effectively suppressing springback and stabilizing the accuracy of the formed part. Compared with traditional mold compensation methods, this application reduces the cost of repeated mold trials and also reduces reliance on the experience and skills of operators.

[0006] According to some embodiments of this application, obtaining the preset target shape reinforcement parameters includes: Using simulation software, a shaping rib is pre-pressed at the midpoint of the chord length of the inner rounded corner of the flange, in a direction perpendicular to the plane where the inner rounded corner of the flange is located. The concave side of the shaping rib faces the same direction as the concave side of the inner rounded corner of the flange. The simulation model corresponds to the product. The simulation model is subjected to a flanging simulation, and the shaping ribs are flattened during the flanging process to obtain a shaped part; Obtain the springback contour map of the formed part; The ribs are adjusted according to the springback cloud diagram to obtain the adjusted target rib parameters.

[0007] According to some embodiments of this application, the shaping rib includes a first end and a second end, and adjusting the shaping rib according to the springback contour map to obtain the target shaping rib parameters includes: Based on the rebound cloud map, the rebound amount of the first end and the second end is obtained; The actual rebound difference is obtained by taking the absolute value of the difference between the rebound amount at the first end and the rebound amount at the second end. The target rib parameters are obtained based on the actual springback difference and the preset springback error.

[0008] According to some embodiments of this application, According to some embodiments of this application, calculating the widths corresponding to the first end and the second end based on the springback amount of the first end and the springback amount of the second end includes: Compare the rebound amount at the first end with the rebound amount at the second end; Substitute the springback amount of the larger end into the preset first rib width allocation function to calculate the corresponding width; Substitute the springback amount of the smaller end into the preset second rib width allocation function to calculate the corresponding width.

[0009] According to some embodiments of this application, the simulation model includes a preset first region and a second region, the first end is located in the first region, and the second end is located in the second region. Obtaining the rebound amount of the first end and the second end based on the rebound contour map includes: Obtain the rebound amount at multiple preset first sampling positions within the first region to obtain multiple first region rebound amounts; The average value of the rebound amounts of multiple first regions is taken as the rebound amount of the first end; Obtain the rebound amount at multiple preset second sampling positions within the second region to obtain multiple rebound amounts for the second region; The average value of the rebound amounts of multiple second regions is taken as the rebound amount of the second end.

[0010] According to some embodiments of this application, the first rib width allocation function is as follows: ; in, W represents the width at the end with the larger rebound amount, and W represents the initial width. This represents the rebound amount at the end with the larger rebound amount. It represents the rebound amount at the smaller end of the rebound amount.

[0011] According to some embodiments of this application, the second rib width allocation function is as follows: ; in, W represents the width at the end with the smaller rebound amount, and W represents the initial width. This represents the rebound amount at the end with the larger rebound amount. It represents the rebound amount at the smaller end of the rebound amount.

[0012] The flanging process according to the second aspect of this application includes: The method for controlling the springback of the flange according to the first aspect of this application.

[0013] The flanging part according to the third aspect embodiment of this application is manufactured according to the flanging process of the second aspect embodiment of this application.

[0014] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a flowchart illustrating the steps of a method for controlling the springback of a flange according to an embodiment of this application. Figure 2 This is a schematic flowchart of step S101 in an embodiment of this application; Figure 3 This is a schematic flowchart of step S204 in an embodiment of this application; Figure 4 This is a schematic flowchart of step S301 in an embodiment of this application; Figure 5 This is a schematic flowchart of step S303 in an embodiment of this application; Figure 6 This is a schematic flowchart of step S503 in an embodiment of this application; Figure 7 This is a schematic diagram of the simulation model after the molding ribs have been pre-pressed according to an embodiment of this application; Figure 8 This is a simplified schematic diagram of the edge-flipping simulation performed on the simulation model of the embodiment of this application.

[0016] Figure label: 100 shaping rib; 101 first end; 102 second end; 200 simulation model; 210 pressure plate; 220 lower flanging cutter; 230 upper flanging cutter. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0018] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0019] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0020] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0021] Currently, in the production process of automotive sheet metal parts (such as A-pillar reinforcements and door frame flanged parts), many products require a flanged process; flanged, simply put, is bending the edge of a sheet metal part at an angle. However, after flanged processing, the formed part often springs back—that is, the bent area springs back slightly, causing a deviation between the final shape and the desired dimensions. The traditional solution is "mold compensation." Simply put, since the product will spring back, the mold is intentionally bent further in the opposite direction so that it springs back to its original position. This method works well for products with simple shapes and uniform springback, but for flanged parts with high curvature, the springback itself is easily affected by slight variations in material batches and mold clearances, making it very unstable. As a result, mold compensation often cannot fully account for all aspects, and the development cycle is long and the mold modification cost is high.

[0022] Based on this, this application proposes a method, a flanging process, and a flanging part for controlling the springback of the flanging. The aim is to pre-press a rib at the midpoint of the inner fillet chord length of the flanging, according to the preset target rib parameters, along a direction parallel to the preset bending line. Then, during the flanging process, the rib is flattened. The pre-pressed rib will generate a reverse bending moment during the back pressing and shaping (i.e., flattening) process, which will at least partially offset the rebound bending moment of the formed part, thereby stabilizing the forming. The required cost is low, and it can be adapted to various products with a wide range of applications.

[0023] The first aspect of this application provides a method for controlling the springback of a flange. (Refer to...) Figure 1 , Figure 1 This is a flowchart illustrating the steps of a method for controlling the springback of a flange according to an embodiment of this application. Figure 1 The illustrated process steps include, but are not limited to, steps S101 to S103.

[0024] Step S101: Obtain the preset target shape reinforcement parameters.

[0025] Step S102: According to the target shaping rib parameters, at the midpoint of the preset inner rounded corner chord of the flange, a shaping rib is pre-pressed in a direction perpendicular to the plane where the inner rounded corner of the flange is located. The concave side of the shaping rib faces the same direction as the concave side of the inner rounded corner of the flange.

[0026] Step S103: Flang the product and flatten the shaping ribs during the flanging process to obtain the shaped part.

[0027] The method for controlling springback during flanging according to embodiments of this application has at least the following beneficial effects: This application pre-presses ribs onto the product using preset target rib parameters, and then flattens the ribs during the flanging process. Since the ribs generate a reverse bending moment during flattening, this reverse bending moment can at least partially offset the rebound bending moment generated by the springback, thereby effectively suppressing springback and stabilizing the accuracy of the formed part. Compared to traditional mold compensation methods, this application reduces the cost of repeated mold trials and also reduces reliance on the experience and skills of operators.

[0028] In some embodiments, refer to Figure 2 Step S101 may include, but is not limited to, steps S201 to S204.

[0029] Step S201: Using simulation software, a shaping rib is pre-pressed at the midpoint of the chord length of the inner rounded corner of the flange, in a direction perpendicular to the plane where the inner rounded corner of the flange is located. The concave side of the shaping rib faces the same direction as the concave side of the inner rounded corner of the flange, and the simulation model corresponds to the product.

[0030] Step S202: Perform a flanging simulation on the simulation model and flatten the shaping ribs during the flanging process to obtain the formed part.

[0031] Step S203: Obtain the springback contour map of the formed part.

[0032] Step S204: Adjust the shaping ribs according to the springback cloud map to obtain the adjusted target shaping rib parameters.

[0033] In step S201 of some embodiments, a simulation model for simulating the product is constructed in the simulation software. The inner rounded corner of the flange is the flange R-angle. The position of the inner rounded corner of the flange is predetermined. At the midpoint of the chord length of the inner rounded corner of the flange, a shaping rib is pre-pressed on the simulation model along the plane direction perpendicular to the inner rounded corner of the flange. The shaping rib includes a raised side and a recessed side. The inner rounded corner of the flange also includes a raised side (outside the rounded corner) and a recessed side (inside the rounded corner). The recessed side of the shaping rib and the recessed side of the inner rounded corner of the flange face the same direction.

[0034] In step S202 of some embodiments, while performing simulated flanging on the simulation model, the shaping ribs are pressed back, i.e. flattened, so that the shaping ribs will not affect the structural shape of the final formed part.

[0035] In step S203 of some embodiments, the springback cloud map of the molded part, i.e., the distribution map of the springback amount on the molded part, is viewed through simulation software.

[0036] In some embodiments, refer to Figure 7 The styling rib 100 includes a first end 101 and a second end 102, as shown in the reference. Figure 3Step S204 may include, but is not limited to, steps S301 to S303.

[0037] Step S301: Obtain the rebound amount of the first end 101 and the second end 102 based on the rebound cloud map.

[0038] In step S302, the absolute value of the difference between the springback amount of the first end 101 and the springback amount of the second end 102 is taken to obtain the actual springback difference.

[0039] Step S303: Based on the actual springback difference and the preset springback error, obtain the target rib parameters.

[0040] In some embodiments, the simulation model 200 includes a preset first region and a second region, with a first end 101 located within the first region and a second end 102 located within the second region, as shown in the reference. Figure 4 Step S301 may include, but is not limited to, steps S401 to S404.

[0041] Step S401: Obtain the rebound amount of multiple preset first sampling positions within the first region to obtain multiple rebound amounts of the first region.

[0042] Step S402: Take the average value of the rebound amount of multiple first regions as the rebound amount of the first end 101.

[0043] Step S403: Obtain the rebound amount of multiple preset second sampling positions within the second region to obtain multiple rebound amounts of the second region.

[0044] Step S404: Take the average value of the rebound amounts of multiple second regions as the rebound amount of the second end 102.

[0045] It should be noted that the first and second regions are areas on the boundary of the simulation model where the first or second end needs to be set, and these can be manually divided.

[0046] In step S401 of some embodiments, the number of first sampling positions is not less than five. Based on the rebound cloud map, the rebound amount corresponding to each first sampling position is obtained, that is, the rebound amount of the first region.

[0047] In step S402 of some embodiments, the average value of the rebound amounts of the multiple first regions is taken as the rebound amount of the first end 101.

[0048] In step S403 of some embodiments, the number of second sampling positions is not less than five. Based on the rebound cloud map, the rebound amount corresponding to each second sampling position is obtained, that is, the rebound amount of the second region.

[0049] In step S404 of some embodiments, the average value of the rebound amounts of the multiple second regions is taken as the rebound amount of the second end 102.

[0050] In the embodiments of this application, steps S401 to S404 involve taking the average value to obtain the springback amount of the first end 101 and the second end 102 of the shaping rib 100, which facilitates subsequent calculations.

[0051] In step S302 of some embodiments, the absolute value of the difference between the springback amount of the first end 101 and the second end 102 of the shaping rib 100 is taken as the actual springback difference.

[0052] In some embodiments, refer to Figure 5 Step S303 may include, but is not limited to, steps S501 to S507.

[0053] Step S501: Compare the actual rebound difference with the rebound error.

[0054] Step S502: When the actual springback difference is less than or equal to the springback error, the widths of the first end 101 and the second end 102 are both set to a preset initial width to obtain the target rib parameters.

[0055] Step S503: When the actual rebound difference is greater than the rebound error but less than or equal to twice the rebound error, the widths corresponding to the first end 101 and the second end 102 are calculated based on the rebound amount of the first end 101 and the rebound amount of the second end 102, so as to obtain the target rib parameters.

[0056] Step S504: When the actual rebound difference is greater than twice the rebound error, the first part and the second part are divided sequentially between the first end 101 and the second end 102. The difference between the rebound amount of the first end 101 and the rebound amount of the first part is equal to the difference between the rebound amount of the second part and the rebound amount of the second end 102. The rebound amount of the first part and the rebound amount of the second part are equal.

[0057] Step S505: Divide the shaping rib 100 into two independent sections: the first end 101 to the first part and the second part to the second end 102.

[0058] Step S506: For the interval from the first end 101 to the first part, the absolute value of the difference between the springback amount of the first end 101 and the springback amount of the first part is taken to obtain a new actual springback difference. The first part is then taken as the new second end 102, and the process jumps to compare the actual springback difference with the springback error.

[0059] Step S507: For the interval from the second part to the second end 102, the absolute value of the difference between the springback amount of the second part and the springback amount of the second end 102 is taken to obtain a new actual springback difference. The second part is then taken as the new first end 101, and the process jumps to compare the actual springback difference with the springback error.

[0060] In step S501 of some embodiments, the actual rebound difference is compared with a preset rebound error.

[0061] In step S502 of some embodiments, when the actual springback difference is less than or equal to the springback error, it indicates that the springback control effect is good. At this time, the shaping rib 100 can be formed in a way that is equal in width, that is, the width of the first end 101 and the second end 102 are the same and are both set to a preset initial width, thereby obtaining the target shaping rib parameters. The value of the initial width is from 0.75 to 1 times the value of the inner radius chord of the flange.

[0062] In some embodiments, refer to Figure 6 Step S503 may include, but is not limited to, steps S601 to S603.

[0063] Step S601: Compare the springback amount of the first end 101 and the springback amount of the second end 102.

[0064] Step S602: Substitute the springback amount of the end with the larger springback amount into the preset first rib width allocation function to calculate the corresponding width.

[0065] Step S603: Substitute the springback amount of the smaller end into the preset second rib width allocation function to calculate the corresponding width.

[0066] In step S601 of some embodiments, when the actual springback difference is greater than the springback error but less than or equal to twice the springback error, the shaping rib 100 is formed in an unequal width manner; the springback amount of the first end 101 and the second end 102 are compared, and the width of the end with the larger springback amount is also larger, so as to constrain it.

[0067] In step S602 of some embodiments, the springback amount of the larger springback end is substituted into the first rib width allocation function to calculate the corresponding width. The first rib width allocation function is as follows: ; in, W represents the width at the end with the larger rebound amount, and W represents the initial width. This represents the rebound amount at the end with the larger rebound amount. It represents the rebound amount at the smaller end of the rebound amount.

[0068] In step S603 of some embodiments, the springback amount of the smaller end is substituted into the second rib width allocation function to calculate the corresponding width. The second rib width allocation function is as follows: ; in, W represents the width at the end with the smaller rebound amount, and W represents the initial width. This represents the rebound amount at the end with the larger rebound amount. It represents the rebound amount at the smaller end of the rebound amount.

[0069] In the embodiments of this application, steps S601 to S603 are performed when the springback difference is greater than the springback error but less than or equal to twice the springback error. By setting unequal widths, a wider width is set at the end with a larger springback amount, so that more reverse bending moment can be generated when the shaping rib 100 is flattened, so as to offset more rebound bending moment of the simulation model 200, thereby achieving stable molding.

[0070] In step S504 of some embodiments, when the springback difference is greater than twice the springback error, a segmented design is adopted, that is, the first part and the second part are sequentially divided between the first end 101 and the second end 102, so that the first end 101, the first part, the second part and the second end 102 are arranged in sequence, the springback amount of the first part and the second part are the same, and the first part and the second part are not connected to each other, with a gap of 1 to 2 mm between them. At the same time, the difference in springback amount between the first end 101 and the first part is equal to the difference in springback amount between the second part and the second end 102. That is, the original section of shaping rib 100 formed by the first end 101 and the second end 102 is divided into two sections of shaping rib 100 with equal difference in springback amount at both ends. The section from the first end 101 to the first part is one section of shaping rib 100, and the section from the second end 102 to the second part is another section of shaping rib 100.

[0071] In step S505 of some embodiments, the shaping rib 100 is divided into two independent sections: the first section is from the first end 101 to the first part, and the second section is from the second part to the second end 102.

[0072] In step S506 of some embodiments, for the interval between the first end 101 and the first part, the absolute value of the difference between the first end 101 and the first part is taken as the new actual rebound difference, and the first part is taken as the new second end 102, and the first end 101 is taken as the new first end 101. Then, the process jumps to step S501, and the width of the shaping rib 100 is set in a cyclical manner of equal width, unequal width, or segmentation, so that the actual rebound difference of each segment is less than or equal to twice the rebound error.

[0073] In step S507 of some embodiments, similarly, for the interval between the second part and the second end 102, the absolute value of the difference between the second end 102 and the second part is taken as the new actual rebound difference, and the second part is taken as the new first end 101, the second end 102 is taken as the new second end 102, and the process jumps to step S501. The width of the shaping rib 100 is set in a cyclical manner of equal width, unequal width, or segmentation, so that the actual rebound difference of each segment is less than or equal to twice the rebound error.

[0074] In steps S501 to S507 of this embodiment, based on the calculated actual springback difference, the widths of the first end 101 and the second end 102 of the shaping rib 100 are designed accordingly to address the problem of uneven springback distribution. This results in a wider width in areas with greater springback, generating more reverse bending moment when the shaping rib 100 is flattened, thereby suppressing the springback of the formed part. In other words, increasing the width of the shaping rib 100 strengthens the constraint and reduces the springback of the flange; conversely, decreasing the width of the shaping rib 100 weakens the constraint and increases the springback of the flange.

[0075] It should be noted that the target rib parameters also include the height and length of the rib 100. The height of the rib 100 is usually set to 3mm (the higher the height, the more it suppresses the springback of the simulation model 200 after the flange is turned). The specific height can be adjusted as needed. The length of the rib 100 is consistent with the width of the simulation model 200 along the plane direction perpendicular to the inner rounded corner of the flange.

[0076] In steps S301 to S303 of this embodiment, the widths of the first end 101 and the second end 102 of the shaping rib 100 are adapted to the actual springback difference between the first end 101 and the second end 102, so as to better suppress the springback after flanging.

[0077] In step S102 of some embodiments, based on the target shaping rib parameters obtained in advance in the simulation software, a shaping rib 100 is pre-pressed out at the midpoint of the inner radius chord of the product flange along a direction perpendicular to the plane where the inner radius of the flange is located, that is, the extension direction of the shaping rib 100 is consistent with the extension direction of the flange.

[0078] In step S103 of some embodiments, the molding rib 100 is flattened while the product is being flanged, so that the reverse bending moment generated by flattening the molding rib 100 is offset by the rebound bending moment generated by flanging, thereby suppressing springback and achieving stable forming.

[0079] For example, in some embodiments, reference is made to Figure 7 , Figure 7 The simulation model 200 is formed after the pre-pressed molding rib 100. The molding rib 100 includes a first end 101 and a second end 102, as shown in the figure. Figure 8 , Figure 8This is a simplified diagram of the flanging simulation of the simulation model 200. The middle area of ​​the upper surface of the simulation model 200 abuts against the pressure plate 210, and the lower surface of the simulation model 200 abuts against the lower flanging blade 220. During the flanging simulation, the upper flanging blades 230 on both sides move downward toward the flanging area close to the upper surface of the simulation model 200. Through the coordinated cooperation of the upper flanging blades 230 and the lower flanging blades 220, the flanging area of ​​the simulation model 200 is flanged while the shaping rib 100 is pressed back. This causes part of the original shaping rib 100 to fit and abut against the lower flanging blade 220. Thus, the springback generated by pressing the shaping rib 100 back offsets the springback generated by the flanging, thereby suppressing the phenomenon of flanging springback.

[0080] The flanging process according to the second aspect of the application includes the method for controlling the flanging springback described in the first aspect of the application above.

[0081] The flanging part according to the third aspect embodiment of the application is manufactured according to the flanging process of the second aspect embodiment of the application.

[0082] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0083] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0084] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0085] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0086] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification 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. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0087] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0088] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0089] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0090] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0091] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0092] Furthermore, it should be noted that in all specific embodiments of this application, when processing data related to user identity or characteristics, such as user information, user behavior data, user historical data, and user location information, user permission or consent will be obtained first. Moreover, the collection, use, and processing of this data will comply with relevant laws, regulations, and standards. Additionally, when embodiments of this application require access to sensitive personal information of users, separate permission or consent from the user will be obtained through pop-ups or redirects to confirmation pages. Only after obtaining the user's separate permission or consent will the necessary user-related data for the proper functioning of these embodiments be acquired.

[0093] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A method for controlling the springback of a flange, characterized in that, The method includes: Obtain the preset target shape reinforcement parameters; According to the target shaping rib parameters, at the midpoint of the preset inner rounded corner chord of the flange, a shaping rib is pre-pressed out in a direction perpendicular to the plane where the inner rounded corner of the flange is located, wherein the concave side of the shaping rib faces the same direction as the concave side of the inner rounded corner of the flange. The product is flanged, and the shaping ribs are flattened during the flanging process to obtain a shaped part.

2. The method for controlling the springback of the flange according to claim 1, characterized in that, The process of obtaining the preset target shape reinforcement parameters includes: Using simulation software, a shaping rib is pre-pressed at the midpoint of the chord length of the inner rounded corner of the flange, in a direction perpendicular to the plane where the inner rounded corner of the flange is located. The concave side of the shaping rib faces the same direction as the concave side of the inner rounded corner of the flange. The simulation model corresponds to the product. The simulation model is subjected to a flanging simulation, and the shaping ribs are flattened during the flanging process to obtain a shaped part; Obtain the springback contour map of the formed part; The ribs are adjusted according to the springback cloud diagram to obtain the adjusted target rib parameters.

3. The method for controlling the springback of the flange according to claim 2, characterized in that, The shaping rib includes a first end and a second end. Adjusting the shaping rib according to the springback contour map to obtain the adjusted target shaping rib parameters includes: Based on the rebound cloud map, the rebound amount of the first end and the second end is obtained; The actual rebound difference is obtained by taking the absolute value of the difference between the rebound amount at the first end and the rebound amount at the second end. The target rib parameters are obtained based on the actual springback difference and the preset springback error.

4. The method for controlling the springback of the flange according to claim 3, characterized in that, The process of obtaining the target shaping rib parameters based on the actual springback difference and the preset springback error includes: Compare the actual rebound difference with the rebound error; When the actual rebound difference is less than or equal to the rebound error, the widths of both the first end and the second end are set to a preset initial width to obtain the target shaping rib parameters. When the actual rebound difference is greater than the rebound error, but less than or equal to twice the rebound error, the widths corresponding to the first end and the second end are calculated based on the rebound amount of the first end and the rebound amount of the second end, so as to obtain the target shaping rib parameters. When the actual rebound difference is greater than twice the rebound error, the first end and the second end are divided into a first part and a second part in sequence, wherein the difference between the rebound amount of the first end and the rebound amount of the first part is equal to the difference between the rebound amount of the second part and the rebound amount of the second end, and the rebound amount of the first part and the rebound amount of the second part are equal. The sculpting rib is divided into two independent sections: from the first end to the first part, and from the second part to the second end. For the interval from the first end to the first part, the absolute value of the difference between the rebound amount of the first end and the rebound amount of the first part is taken to obtain the new actual rebound difference, and the first part is taken as the new second end, and the process jumps to comparing the actual rebound difference with the rebound error. For the interval from the second part to the second end, the absolute value of the difference between the rebound amount of the second part and the rebound amount of the second end is taken to obtain the new actual rebound difference. The second part is then taken as the new first end, and the process jumps to comparing the actual rebound difference with the rebound error.

5. The method for controlling the springback of the flange according to claim 4, characterized in that, The step of calculating the widths corresponding to the first end and the second end based on the springback amount of the first end and the springback amount of the second end includes: Compare the rebound amount at the first end with the rebound amount at the second end; Substitute the springback amount of the larger end into the preset first rib width allocation function to calculate the corresponding width; Substitute the springback amount of the smaller end into the preset second rib width allocation function to calculate the corresponding width.

6. The method for controlling the springback of the flange according to claim 3, characterized in that, The simulation model includes a preset first region and a second region, with the first end located within the first region and the second end located within the second region. Obtaining the rebound amount of the first end and the second end based on the rebound contour map includes: Obtain the rebound amount at multiple preset first sampling positions within the first region to obtain multiple first region rebound amounts; The average value of the rebound amounts of multiple first regions is taken as the rebound amount of the first end; Obtain the rebound amount at multiple preset second sampling positions within the second region to obtain multiple rebound amounts for the second region; The average value of the rebound amounts of multiple second regions is taken as the rebound amount of the second end.

7. The method for controlling the springback of the flange according to claim 5, characterized in that, The first rib width allocation function is as follows: ； in, W represents the width at the end with the larger rebound amount, and W represents the initial width. This represents the rebound amount at the end with the larger rebound amount. It represents the rebound amount at the smaller end of the rebound amount.

8. The method for controlling the springback of the flange according to claim 5, characterized in that, The second rib width allocation function is as follows: ； in, W represents the width at the end with the smaller rebound amount, and W represents the initial width. This represents the rebound amount at the end with the larger rebound amount. It represents the rebound amount at the smaller end of the rebound amount.

9. A flanging process, characterized in that, include: The method for controlling the springback of the flange according to any one of claims 1 to 8.

10. A flanged part, characterized in that, The flanged part is manufactured using the flanged process according to claim 9.

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