Method for rectifying front blocking area of side wall outer plate

Abstract

The invention discloses a rectification method for a front blocking area of a side wall outer panel, and relates to the technical field of vehicles, and the rectification method for the front blocking area of the side wall outer panel comprises the following steps: processing the side wall outer panel to enable contour data of the front blocking area of the side wall outer panel to be larger than a first preset numerical value of theoretical contour data; actual contour data of a front blocking area of the side wall outer plate are measured; and rectifying the front baffle area of the side wall outer plate based on the actual contour data and the theoretical contour data. According to the technical scheme, when the side wall outer plate is machined, the outline of the front blocking area of the side wall outer plate is larger by the first preset value, the probability of repair welding of the male die body during rectification can be effectively reduced, and the size rectification efficiency of the side wall outer plate is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a method for modifying the front windshield area of ​​a side panel. Background Technology

[0002] The side panel is a large and complex sheet metal part in the automotive body panel that connects key areas such as the roof, front and rear doors, and fenders. Its dimensional accuracy directly affects the overall appearance and sealing of the vehicle. However, there are technical problems with low rectification efficiency during the production and processing of the side panel.

[0003] Therefore, it is necessary to provide a new method for modifying the front windshield area of ​​the side panel to solve the above-mentioned technical problems. Summary of the Invention

[0004] The main objective of this invention is to provide a method for rectifying the front fender area of ​​the side panel, aiming to solve the technical problem of low efficiency in dimensional rectification of the outer side panel during production and processing.

[0005] To achieve the above objectives, the present invention proposes a method for rectifying the front fender area of ​​the side panel, comprising the following steps: Process the side panel so that the contour data of the front bumper area of ​​the side panel is greater than the theoretical contour data first preset value; Measure the actual contour data of the front bumper area of ​​the side panel; The front fender area of ​​the side panel is modified based on the actual contour data and the theoretical contour data.

[0006] In one embodiment, the step of modifying the front fender area of ​​the side panel based on the actual contour data and the theoretical contour data includes: Compare the actual contour data with the theoretical contour data; If the actual contour data is greater than the theoretical contour data, the movable punch is machined to remove excess material to adjust the punch surface; and the shaping wedge is welded to make the spacing and material thickness between the shaping wedge and the movable punch equal. If the actual contour data is smaller than the theoretical contour data, then the front windshield area of ​​the side panel is modified based on the difference between the actual contour data and the theoretical contour data.

[0007] In one embodiment, the step of modifying the front fender area of ​​the side panel based on the difference between the actual contour data and the theoretical contour data if the actual contour data is smaller than the theoretical contour data includes: Calculate the difference between the actual contour data and the theoretical contour data; If the difference between the actual contour data and the theoretical contour data is less than the second preset value, the movable punch is repaired by welding to adjust the convex surface of the movable punch; and the shaping wedge is machined to remove excess material so that the distance and material thickness between the shaping wedge and the movable punch are equal. If the difference between the actual contour data and the theoretical contour data is greater than a second preset value, the position of the movable punch is adjusted based on the difference between the actual contour data and the theoretical contour data, and the convex surface of the movable punch is processed according to the theoretical contour data; and the shaping wedge is processed so that the distance and material thickness between the shaping wedge and the movable punch are equal.

[0008] In one embodiment, the movable punch includes a punch body and a small support core. The punch body is slidably disposed on the lower die base along a first direction via a sliding plate. The punch body is provided with a sliding groove, and the small support core is slidably disposed in the sliding groove along a second direction. The punch body is provided with a first profile, and the small support core is provided with a second profile. The first profile and the second profile are smoothly connected to form the punch profile. If the difference between the actual contour data and the theoretical contour data is greater than a second preset value, the position of the movable punch is adjusted based on the difference between the actual contour data and the theoretical contour data, and the convex surface of the movable punch is processed according to the theoretical contour data; and the shaping wedge is processed to make the distance and material thickness between the shaping wedge and the movable punch equal, the steps include: Based on the difference between the actual contour data and the theoretical contour data, the slide plate is processed to remove excess material; Calculate the first distance that the punch body needs to slide, and push the punch body based on the first distance so that the punch body slides along the first direction toward the direction of the shaping wedge; Calculate the second distance that the small support core needs to slide, and push the small support core based on the second distance so that the small support core slides along the second direction toward the direction of the shaping wedge; The first and second surfaces are processed based on the theoretical contour data; The shaping wedge is processed to make the distance and material thickness between the shaping wedge and the movable punch equal.

[0009] In one embodiment, the step of calculating the first distance that the punch body needs to slide, and pushing the punch body based on the first distance to make the punch body slide along the first direction toward the shaping wedge includes: Calculate the first distance that the punch body needs to slide; A first shim is added between the side of the punch body away from the shaping wedge and the lower die base, and the thickness of the first shim is equal to the first distance. The step of calculating the second distance required for the small support core to slide, and pushing the small support core based on the second distance to make the small support core slide along the second direction toward the direction of the shaping wedge includes: Calculate the second distance that the small support core needs to slide; A second shim is added between the small support core and the bottom surface of the slide groove, and the thickness of the second shim is equal to the second distance.

[0010] In one embodiment, the second preset value is 1 mm.

[0011] In one embodiment, the first direction is set at an angle to the bottom surface of the lower mold base, and the second direction is set at an angle to the first direction.

[0012] In one embodiment, the step of modifying the front fender area of ​​the side panel based on the actual contour data and the theoretical contour data includes: Measure the area to be rectified. If the contour rectification range is less than the third preset value, then the front windshield area of ​​the side panel is rectified based on the actual contour data and the theoretical contour data. If the contour rectification range is greater than the third preset value, then the difference between the actual contour data and the theoretical contour data is calculated, the position of the movable punch is adjusted based on the difference between the actual contour data and the theoretical contour data, the convex model surface of the movable punch is processed according to the theoretical contour data, and the shaping wedge is processed so that the distance and material thickness between the shaping wedge and the movable punch are equal.

[0013] In one embodiment, the third preset value is 100 mm.

[0014] In one embodiment, the first preset value is 0.5 mm.

[0015] The technical solution of this invention, by making the contour of the front stop area of ​​the side panel larger than a first preset value during processing, effectively reduces the probability of needing to repair welding the punch body during rectification, thereby improving the efficiency of dimensional rectification of the side panel. In this embodiment, firstly, during the processing stage of the side panel, the contour data of the front stop area of ​​the side panel is increased by a first preset value based on the theoretical contour data. This ensures that the initial part contour tends to have a positive tolerance, effectively avoiding negative contour deviations and reducing the probability of needing to repair welding the punch body during rectification. This avoids the problem of prolonged rectification cycle due to punch body repair welding, thus improving the efficiency of dimensional rectification of the side panel. Subsequently, the actual contour data of the front stop area of ​​the side panel is obtained through coordinate measuring machine (CMM). Finally, by comparing the actual contour data with the theoretical contour data, the dimensions of the side panel can be rectified, completing the dimensional rectification operation. Furthermore, by using the above steps to rectify the front stop area of ​​the side panel, only one round of rectification is needed to ensure that the dimensions of the front stop area of ​​the side panel are up to standard, which greatly improves rectification efficiency. Specifically, by increasing the contour data of the front panel area of ​​the side panel by a first preset value based on the theoretical contour data, problems such as deformation, cracks, and pinholes caused by welding of the punch body can be effectively avoided, ensuring the stability of the mold structure and the controllability of the rectification process. As a result, the front panel area of ​​the side panel can meet the contour size requirements with only one round of rectification. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A flowchart illustrating the rectification method for the front windshield area of ​​the side panel in the first embodiment of the present invention; Figure 2 A flowchart illustrating the rectification method for the front windshield area of ​​the side panel in the second embodiment of the present invention; Figure 3 A flowchart illustrating the rectification method for the front windshield area of ​​the side panel in the third embodiment of the present invention; Figure 4 A schematic diagram of the structure of the lower die holder and the movable punch in one embodiment of the present invention; Figure 5 for Figure 4 Cross-sectional view; Figure 6A flowchart illustrating the rectification method for the front windshield area of ​​the side panel in the fourth embodiment of the present invention; Figure 7 A flowchart illustrating the rectification method for the front windshield area of ​​the side panel in the fifth embodiment of the present invention.

[0018] Explanation of icon numbers: 100. Lower mold base; 200. Movable punch; 210. Punch body; 211. Slide plate; 212. Slide groove; 213. First mold surface; 220. Small support core; 221. Second mold surface.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, if the embodiments of the present invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0023] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0024] The side panel is a large and complex sheet metal part in the automotive body panel that connects key areas such as the roof, front and rear doors, and fenders. Its dimensional accuracy directly affects the overall appearance and sealing of the vehicle. In actual production and R&D, researchers have found through long-term data statistics and on-site tracking that the dimensional pass rate of the first-time side panel is low, especially in the front windshield area, which is a critical dimension in vehicle manufacturing and extremely difficult to rectify. The contour tolerance requirements in this area are extremely high. However, due to the complex mold structure, many moving parts, and large cumulative assembly errors, the traditional rectification method of "welding + deburring" easily leads to a series of derivative problems such as deformation, cracks, and pinholes in the punch body due to welding heat. This not only prolongs the rectification cycle (e.g., requiring multiple rounds of rectification) but also affects the long-term stability of the mold and the rectification quality of the side panel, thus affecting the efficiency of dimensional rectification of the side panel.

[0025] This invention proposes a method for rectifying the front fender area of ​​the side panel, aiming to solve the technical problem of low efficiency in dimensional rectification of the outer edge of the side panel during production and processing.

[0026] Please see Figure 1 , Figure 1 This is a flowchart illustrating a method for rectifying the front windshield area of ​​the side panel in a first embodiment of the present invention. In one embodiment of the present invention, the method for rectifying the front windshield area of ​​the side panel includes the following steps: Step S100: Process the side panel so that the contour data of the front windshield area of ​​the side panel is greater than the theoretical contour data of a first preset value; wherein, the first preset value is 0.5mm; Step S200: Measure the actual contour data of the front fender area of ​​the side panel; Step S300: Modify the front fender area of ​​the side panel based on actual contour data and theoretical contour data.

[0027] The technical solution of this invention, by making the contour of the front blocking area of ​​the side panel larger than a first preset value during processing, can effectively reduce the probability of needing to weld the punch body 210 during rectification, thereby improving the efficiency of dimensional rectification of the side panel. In this embodiment, firstly, during the processing stage of the side panel, the contour data of the front blocking area of ​​the side panel is increased by a first preset value based on the theoretical contour data. This ensures that the initial part contour tends to have a positive tolerance, effectively avoiding negative contour deviations and reducing the probability of needing to weld the punch body 210 during rectification. This avoids the problem of prolonged rectification cycle due to welding of the punch body 210, thus improving the efficiency of dimensional rectification of the side panel. Subsequently, the actual contour data of the front blocking area of ​​the side panel is obtained through coordinate measuring machine (CMM). Finally, by comparing the actual contour data with the theoretical contour data, the dimensions of the side panel can be rectified, completing the dimensional rectification operation of the side panel. Furthermore, by employing the above steps to modify the front fender area of ​​the side panel, only one round of modification is needed to ensure the dimensions of the front fender area meet the requirements, significantly improving modification efficiency. Specifically, increasing the contour data of the front fender area of ​​the side panel by a first preset value based on the theoretical contour data effectively avoids problems such as deformation, cracks, and pinholes caused by welding of the punch body 210, ensuring the stability of the mold structure and the controllability of the modification process. This allows the front fender area of ​​the side panel to meet the contour dimensional requirements with only one round of modification. This modification method for the front fender area of ​​the side panel can be applied in technical fields such as vehicle production.

[0028] In this embodiment, the first preset value is 5mm. By setting the first preset value to 5mm, the probability of the contour being within negative tolerance during the first part production can be significantly reduced, and the possibility of welding the punch body 210 can be significantly reduced. This avoids a series of problems such as cracks and deformation caused by welding the punch body 210, ensuring the stability of the mold structure and the controllability of the rectification process, thereby improving the success rate of the first round of rectification. At the same time, setting the first preset value to 5mm can also prevent excessive deviations in the front area of ​​the side panel, reduce the amount of machining required for rectification, and thus avoid thermal deformation of the punch body 210 due to large machining allowances.

[0029] It should be noted that during the actual processing of the side panel, due to the fact that the accuracy of the processing data simulation cannot reach 100% and the accumulation of errors, even if the outline of the front bumper area of ​​the side panel is larger than the first preset value, the actual outline data of the front bumper area of ​​the side panel is still difficult to predict. There is still a possibility that the actual outline data is larger or larger than the theoretical outline data. Therefore, after the first part is produced, it is still necessary to make corrections based on the actual outline data of the front bumper area of ​​the side panel.

[0030] Please see Figure 2 , Figure 2This is a flowchart illustrating the method for rectifying the front fender area of ​​the side panel in the second embodiment of the present invention. Step S300 includes: Step S310: Compare the actual contour data with the theoretical contour data; Step S320: If the actual contour data is greater than the theoretical contour data, the movable punch 200 is machined to remove excess material in order to adjust the convex surface of the movable punch 200; and the forming wedge is welded to make the spacing and material thickness between the forming wedge and the movable punch 200 equal. Step S330: If the actual contour data is smaller than the theoretical contour data, then the front windshield area of ​​the side panel is modified based on the difference between the actual contour data and the theoretical contour data.

[0031] In this embodiment, when the actual contour data is greater than the theoretical contour data, it indicates that the overall contour of the front blocking area of ​​the side panel is too large. In this case, the convex surface of the movable punch 200 can be directly machined to remove excess material, reducing the contour size until it matches the theoretical contour data. Simultaneously, to ensure a uniform gap of material thickness between the forming wedge and the movable punch 200, the corresponding surface of the forming wedge needs to be welded. When the actual contour data is less than the theoretical contour data, the overall contour of the front blocking area of ​​the side panel is too small. In this case, to avoid deformation, cracks, and pinholes in the punch body 210 due to welding, a corresponding rectification process needs to be selected based on the difference between the actual and theoretical contour data to rectify the front blocking area of ​​the side panel.

[0032] Please see Figure 3 , Figure 3 A flowchart illustrating the rectification method for the front fender area of ​​the side panel in the third embodiment of the present invention. Step S330 includes: Step S331: Calculate the difference between the actual contour data and the theoretical contour data; Step S332: If the difference between the actual contour data and the theoretical contour data is less than the second preset value, the movable punch 200 is repaired by welding to adjust the convex surface of the movable punch 200; and the shaping wedge is processed to remove excess material so that the distance and material thickness between the shaping wedge and the movable punch 200 are equal. Step S333: If the difference between the actual contour data and the theoretical contour data is greater than the second preset value, then adjust the position of the movable punch 200 based on the difference between the actual contour data and the theoretical contour data, and process the convex model surface of the movable punch 200 according to the theoretical contour data; and process the shaping wedge to make the distance and material thickness between the shaping wedge and the movable punch 200 equal. The second preset data is 1 mm.

[0033] In this embodiment, when the difference between the actual contour data and the theoretical contour data is less than the second preset value, it indicates that the deviation of the actual contour data is small. At this time, welding the movable punch 200 will not generate enough heat to cause deformation, cracks, or pinholes in the movable punch 200. Therefore, the convex surface of the movable punch 200 can be directly machined to remove excess material, reducing the contour size until it matches the theoretical contour data. When the difference between the actual contour data and the theoretical contour data is greater than the second preset value, it indicates that the deviation of the actual contour data is large. At this time, welding the movable punch 200 is likely to cause deformation, cracks, or pinholes in the movable punch 200. Therefore, the position of the movable punch 200 needs to be adjusted according to the difference between the actual contour data and the theoretical contour data. After the position of the movable punch 200 is adjusted, the convex surface of the movable punch 200 is machined. At the same time, the forming wedge also needs to be machined to make the distance and material thickness between the forming wedge and the movable punch 200 equal.

[0034] In this embodiment, as Figure 4 and Figure 5 As shown, the movable punch 200 includes a punch body 210 and a small support core 220. The punch body 210 is slidably disposed on the lower die base 100 along a first direction via a slide plate 211. The punch body 210 is provided with a slide groove 212, and the small support core 220 is slidably disposed within the slide groove 212 along a second direction. The punch body 210 is provided with a first profile 213, and the small support core 220 is provided with a second profile 221. The first profile 213 and the second profile 221 are smoothly connected to form the punch surface. The first direction refers to... Figure 5 The direction indicated by M in the diagram, the second direction refers to... Figure 5 The direction indicated by N in the diagram. The first direction is set at an angle to the bottom surface of the lower mold base 100, and the second direction is set at an angle to the first direction.

[0035] Please see Figure 6 , Figure 6 A flowchart illustrating the rectification method for the front fender area of ​​the side panel in the fourth embodiment of the present invention. Step S333 includes: Step S333a: Based on the difference between the actual contour data and the theoretical contour data, the slide plate 211 is processed to remove excess material; Step S333b: Calculate the first distance that the punch body 210 needs to slide, and push the punch body 210 based on the first distance so that the punch body 210 slides along the first direction toward the direction of the shaping wedge; Step S333c: Calculate the second sliding distance required for the small support core 220, and push the small support core 220 based on the second distance so that the small support core 220 slides along the second direction toward the direction of the shaping wedge; Step S333d: Machining the first surface 213 and the second surface 221 based on theoretical contour data; Step S333e: Process the forming wedge to make the distance and material thickness between the forming wedge and the movable punch 200 equal.

[0036] In this embodiment, the above steps can increase the profile of the convex surface of the movable punch 200 to meet the rectification requirements of the front bumper area of ​​the side panel. Specifically, based on the difference between the actual profile data and the theoretical profile data, the sliding is processed to reduce the amount of material, which can lower the punch body 210 and increase the profile of the first surface 213. After the sliding plate 211 of the punch body 210 is processed to reduce the amount of material, the height of the punch body 210 will be too low. At this time, the first distance that the punch body 210 needs to slide is calculated, and the punch body 210 is driven to slide along the first direction towards the direction of the shaping wedge, which can raise the height of the punch body 210 so that the height of the first surface 213 is restored. Simultaneously, after the machining of the slide plate 211 of the punch body 210, the second profile 221 of the small support core 220 will also be too low. At this time, the second sliding distance required for the small support core 220 is calculated, and the small support core 220 is driven to slide along the second direction towards the forming wedge, which can raise the height of the small support core 220 so that the height of the second profile 221 is restored. After the positions of the punch body 210 and the small support core 220 are adjusted, the first profile 213 of the movable punch 200 and the second profile 221 of the small support core 220 can be re-shaped and machined, and then finished according to the theoretical contour data, thereby achieving the effect of increasing the contour while keeping the profiles of the movable punch 200 and the small support core 220 unchanged.

[0037] It should be noted that after machining the sliding surface, in order to eliminate machining accuracy errors and ensure the consistency of the sliding surface between the movable punch 200 and the lower die holder 100, the movable punch 200 needs to be re-slid-assembled on the lower die holder 100 using the Landan Ajing movable punch 200.

[0038] In one specific embodiment, the calculation is based on a difference of 0.75 mm between the actual contour data and the theoretical contour data. Measurements show that the angle between the first direction and the horizontal plane is 20°, therefore the first sliding distance required for the punch body 210 is 0.75 × tan20° = 2.06 mm. Correspondingly, the second sliding distance required for the small support core 220 is... .

[0039] Step S333b includes: Calculate the first sliding distance required for the punch body 210; A first shim is added between the side of the punch body 210 away from the forming wedge and the lower die base 100, and the thickness of the first shim is equal to the first distance. Step S333c includes: Calculate the second distance that the small support core 220 needs to slide; A second shim is added between the bottom surface of the small support core 220 and the slide groove 212, and the thickness of the second shim is equal to the second distance.

[0040] In this embodiment, the positions of the punch body 210 and the small support core 220 are adjusted by adding shims, which can reduce the difficulty of adjusting the position of the movable punch 200.

[0041] Please see Figure 7 , Figure 7 A flowchart illustrating the rectification method for the front fender area of ​​the side panel in the fifth embodiment of the present invention. Step S300 includes: Step S340: Measure the area to be corrected for the outline; Step S350: If the contour rectification range is less than the third preset value, then the front windshield area of ​​the side panel is rectified based on the actual contour data and the theoretical contour data. Step S360: If the contour rectification range is greater than the third preset value, calculate the difference between the actual contour data and the theoretical contour data, adjust the position of the movable punch 200 based on the difference, and process the convex model surface of the movable punch 200 according to the theoretical contour data; and process the forming wedge to make the distance and material thickness between the forming wedge and the movable punch 200 equal. The third preset value is 100mm.

[0042] In this embodiment, by measuring the contour rectification range and selecting different rectification methods, problems such as deformation, cracks, and pinholes caused by welding of the punch body 210 can be effectively avoided, ensuring the stability of the mold structure and the controllability of the rectification process, thereby improving the rectification efficiency of the side panel. Specifically, when the contour rectification range is less than the third preset value, it indicates that the contour rectification range is small. At this time, welding of the movable punch 200 will not generate enough heat to cause deformation, cracks, or pinholes in the movable punch 200. Therefore, the front area of ​​the side panel can be rectified based on the actual contour data and theoretical contour data, i.e., steps S310 to S330 are performed as described above. When the contour rectification range is greater than the third preset value, it indicates that the contour rectification range is large. At this time, welding the movable punch 200 may easily lead to problems such as deformation, cracks, and sand holes in the movable punch 200. Therefore, the difference between the actual contour data and the theoretical contour data is calculated, and the position of the movable punch 200 is adjusted based on the difference between the actual contour data and the theoretical contour data. The convex model surface of the movable punch 200 is processed according to the theoretical contour data. The forming wedge is also processed to make the distance and material thickness between the forming wedge and the movable punch 200 equal, that is, the above step S333 is performed.

[0043] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A method for modifying the front fender area of ​​a side panel, characterized in that, Includes the following steps: Process the side panel so that the contour data of the front bumper area of ​​the side panel is greater than the theoretical contour data first preset value; Measure the actual contour data of the front bumper area of ​​the side panel; The front fender area of ​​the side panel is modified based on the actual contour data and the theoretical contour data.

2. The method for rectifying the front fender area of ​​the side panel as described in claim 1, characterized in that, The steps for modifying the front fender area of ​​the side panel based on the actual contour data and the theoretical contour data include: Compare the actual contour data with the theoretical contour data; If the actual contour data is greater than the theoretical contour data, the movable punch is machined to remove excess material to adjust the punch surface; and the shaping wedge is welded to make the spacing and material thickness between the shaping wedge and the movable punch equal. If the actual contour data is smaller than the theoretical contour data, then the front windshield area of ​​the side panel is modified based on the difference between the actual contour data and the theoretical contour data.

3. The method for rectifying the front fender area of ​​the side panel as described in claim 2, characterized in that, The step of modifying the front fender area of ​​the side panel based on the difference between the actual contour data and the theoretical contour data if the actual contour data is smaller than the theoretical contour data includes: Calculate the difference between the actual contour data and the theoretical contour data; If the difference between the actual contour data and the theoretical contour data is less than the second preset value, the movable punch is repaired by welding to adjust the convex surface of the movable punch; and the shaping wedge is machined to remove excess material so that the distance and material thickness between the shaping wedge and the movable punch are equal. If the difference between the actual contour data and the theoretical contour data is greater than a second preset value, the position of the movable punch is adjusted based on the difference between the actual contour data and the theoretical contour data, and the convex surface of the movable punch is processed according to the theoretical contour data; and the shaping wedge is processed so that the distance and material thickness between the shaping wedge and the movable punch are equal.

4. The method for rectifying the front fender area of ​​the side panel as described in claim 3, characterized in that, The movable punch includes a punch body and a small support core. The punch body is slidably disposed on the lower die base along a first direction via a sliding plate. The punch body is provided with a sliding groove, and the small support core is slidably disposed in the sliding groove along a second direction. The punch body is provided with a first profile, and the small support core is provided with a second profile. The first profile and the second profile are smoothly connected to form the punch profile. If the difference between the actual contour data and the theoretical contour data is greater than a second preset value, the position of the active punch is adjusted based on the difference between the actual contour data and the theoretical contour data, and the convex model surface of the active punch is processed according to the theoretical contour data. The step of machining the shaping wedge to make the distance and material thickness between the shaping wedge and the movable punch equal includes: Based on the difference between the actual contour data and the theoretical contour data, the slide plate is processed to remove excess material; Calculate the first distance that the punch body needs to slide, and push the punch body based on the first distance so that the punch body slides along the first direction toward the direction of the shaping wedge; Calculate the second distance that the small support core needs to slide, and push the small support core based on the second distance so that the small support core slides along the second direction toward the direction of the shaping wedge; The first and second surfaces are processed based on the theoretical contour data; The shaping wedge is processed to make the distance and material thickness between the shaping wedge and the movable punch equal.

5. The method for rectifying the front fender area of ​​the side panel as described in claim 4, characterized in that, The step of calculating the first distance required for the punch body to slide, and pushing the punch body based on the first distance to make the punch body slide along the first direction toward the shaping wedge includes: Calculate the first distance that the punch body needs to slide; A first shim is added between the side of the punch body away from the shaping wedge and the lower die base, and the thickness of the first shim is equal to the first distance. The step of calculating the second distance required for the small support core to slide, and pushing the small support core based on the second distance to make the small support core slide along the second direction toward the direction of the shaping wedge includes: Calculate the second distance that the small support core needs to slide; A second shim is added between the small support core and the bottom surface of the slide groove, and the thickness of the second shim is equal to the second distance.

6. The method for rectifying the front fender area of ​​the side panel as described in claim 3, characterized in that, The second preset value is 1mm.

7. The method for rectifying the front fender area of ​​the side panel as described in claim 4, characterized in that, The first direction is set at an angle to the bottom surface of the lower mold base, and the second direction is set at an angle to the first direction.

8. The method for rectifying the front fender area of ​​the side panel as described in claim 1, characterized in that, The steps for modifying the front fender area of ​​the side panel based on the actual contour data and the theoretical contour data include: Measure the area to be rectified. If the contour rectification range is less than the third preset value, then the front windshield area of ​​the side panel is rectified based on the actual contour data and the theoretical contour data. If the contour rectification range is greater than the third preset value, then the difference between the actual contour data and the theoretical contour data is calculated, the position of the movable punch is adjusted based on the difference between the actual contour data and the theoretical contour data, the convex model surface of the movable punch is processed according to the theoretical contour data, and the shaping wedge is processed so that the distance and material thickness between the shaping wedge and the movable punch are equal.

9. The method for rectifying the front fender area of ​​the side panel as described in claim 8, characterized in that, The third preset value is 100mm.

10. The method for rectifying the front fender area of ​​the side panel as described in any one of claims 1 to 9, characterized in that, The first preset value is 0.5mm.

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