A fender processing method capable of correcting the springback amount of a part surface

Abstract

The application discloses a fender processing method capable of correcting part surface rebound, and relates to the technical field of automobile fender manufacturing. The method comprises the following steps: S1, drawing; S2, trimming; S3, flanging and shaping: flanging along a flanging contour line to form an equidistant flanging surface and an outer edge fold surface, shaping an equal-height protrusion surface on one side of the equidistant flanging surface close to the outer edge fold surface, and connecting the equidistant flanging surface and the equal-height protrusion surface by an equal-R shaping surface to obtain a fender semi-finished product; and S4, side shaping to eliminate the equal-height protrusion surface and the equal-R shaping surface to obtain a finished fender. The fender processing method provided by the application can greatly relieve the local subsidence and upward bending of the type surface on the A column side, so that the produced fender meets the type surface tolerance requirements, and repeated adjustment of the stamping die is not needed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile fender manufacturing, and particularly relates to a fender processing method capable of correcting part surface springback. BACKGROUND

[0002] In the existing automobile panel production industry, the fender is an irregular part and is an important appearance part of the automobile. Since the automobile fender is a reference part connecting the side wall, the outer panel of the hood, the front bumper and the front door outer panel, and needs to match high precision after assembly, the quality requirement for the automobile fender is very high. At present, the production and processing of the fender is mainly completed through three process steps of drawing, trimming and flanging.

[0003] However, after the plate material passes through the drawing and trimming processes, the semi-finished fender is prone to springback deformation due to insufficient rigidity of the part itself curved surface modeling, that is, a large area of the middle part of the profile on the A column side of the fender will appear to sink and springback, and the upper and lower parts of the A column will also appear to be upturned.

[0004] In the face of this situation, if the conventional vertical flanging structure form is continued to be used in the subsequent vertical flanging process, the support and correction of the product profile on the A column side cannot be strengthened, and the local sinking and upturning phenomenon after flanging will not be improved, and the sinking springback amount will be further increased until the side flanging is completed. This leads to that the profile tolerance of the produced fender does not meet the requirements, and the fender stamping die must be restructured and repeatedly corrected, which is a huge workload. SUMMARY

[0005] The purpose of the present application is to provide a fender processing method capable of correcting part surface springback, which can greatly alleviate the local sinking and upturning phenomenon of the profile on the A column side, so that the produced fender meets the profile tolerance requirements without repeated adjustment of the stamping die.

[0006] To achieve the above purpose, the present application provides a fender processing method capable of correcting part surface springback, comprising the following steps:

[0007] S1, drawing: using a drawing die, so that the flat plate material becomes a fender drawing part in a convex special-shaped closed form after the material is extended and compressed by the die stamping;

[0008] S2, trimming: using a trimming die to remove the supplementary waste of the fender drawing part to obtain a fender trimming part;

[0009] S3, flanging and shaping: flanging the outer side of the fender A column along the flanging contour line to form an equidistant flanging surface and an outer edge fold surface, shaping an isometric protrusion surface extending towards both ends of the fender A column on the side of the equidistant flanging surface close to the outer edge fold surface, and connecting the equidistant flanging surface and the isometric protrusion surface by an equi-R-shaped surface to obtain a fender semi-finished product;

[0010] S4, side shaping: eliminating the isometric protrusion surface and the equi-R-shaped surface by shaping to obtain a finished fender.

[0011] As a further improvement of the application, the part of the isometric protrusion surface close to the lower end of the fender A column is a gradual surface with gradually decreasing protrusion height and eventually zero.

[0012] As a further improvement of the application, the distance between the main part of the equi-R-shaped surface and the flanging contour line remains consistent, and the lower part of the equi-R-shaped surface gradually expands the distance between the flanging contour line in the process of approaching the lower end of the fender A column, in this expansion process, the equi-R-shaped surface and the isometric protrusion surface will disappear on the outer edge fold surface.

[0013] As a further improvement of the application, the part of the equi-R-shaped surface and the isometric protrusion surface close to the upper end of the fender A column extends to the product trimming line division position and stops.

[0014] As a further improvement of the application, the height of the equi-R-shaped surface is the same as the height of the isometric protrusion surface.

[0015] As a further improvement of the application, the equi-R-shaped surface is an arc-shaped surface with a central angle of 90°.

[0016] As a further improvement of the application, the height of the isometric protrusion surface is 3mm-50mm.

[0017] As a further improvement of the application, the angle between the equidistant flanging surface and the outer edge fold surface is 90°.

[0018] As a further improvement of the application, the side of the isometric protrusion surface close to the outer edge fold surface is an integral structure with the outer edge fold surface.

[0019] As a further improvement of the application, the extension length of the equi-R-shaped surface and the isometric protrusion surface includes the range where the sinking rebound amount occurs.

[0020] Advantages

[0021] Compared with the prior art, the fender processing method of the application has the following advantages:

[0022] The method can increase the rigidity of the equal-distance flanging surface of the outer side of the product profile of the fender A column side, thereby greatly relieving the partial sinking of the middle part of the product profile of the fender A column side in the subsequent process, the upwarping of the upper and lower parts of the fender A column, avoiding the further increase of the sinking rebound amount, and making the produced fender meet the profile tolerance requirements, without repeatedly adjusting the stamping die.

[0023] The present application will become more apparent from the following description when taken in conjunction with the accompanying drawings, which are intended to explain embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings are within the scope of the present application.

[0025] Figure 1 The process flow diagram of the present application is shown in the figure.

[0026] Figure 2 The structure diagram of the fender drawing part to be trimmed is shown in the figure.

[0027] Figure 3 The structure diagram of the finished fender is shown in the figure.

[0028] Figure 4 The perspective view of the fender semi-finished part is shown in the figure.

[0029] Figure 5 The fender A column outer side cross-sectional structure diagram of the fender semi-finished part is shown in the figure.

[0030] Wherein: 1-fender drawing part; 11-fender semi-finished part; 2-flanging contour line; 3-equal-distance flanging surface; 31-outer edge folding surface; 4-equal-height protruding surface; 5-equal-R forming surface; 6-gradient surface. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will further describe the present application in combination with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0032] The embodiments of the present application will now be described with reference to the accompanying drawings.

[0033] EMBODIMENT

[0034] The specific embodiments of the present application are shown as Figures 1-5 A fender processing method capable of correcting the springback amount of a part surface, comprising the following steps:

[0035] S1, drawing: using a drawing die, the flat plate material is subjected to drawing and compression deformation after passing through the die, and becomes a fender drawing part 1 in a convex special-shaped closed form;

[0036] S2, trimming: using a trimming die, the trimming waste of the fender drawing part is removed to obtain a fender trimming part;

[0037] S3, flanging and shaping: on the fender A-pillar outer side, flanging is performed along the flanging contour line 2 to form an equidistant flanging surface 3 and an outer edge fold surface 31, an isometric convex surface 4 extending towards the two ends of the fender A-pillar is shaped on the side of the equidistant flanging surface 3 close to the outer edge fold surface 31, and an equal-R shaping surface 5 is connected between the equidistant flanging surface 3 and the isometric convex surface 4 to obtain a fender semi-finished part 11;

[0038] S4, side shaping: the isometric convex surface 4 and the equal-R shaping surface 5 are eliminated by shaping to obtain a finished fender.

[0039] In this method, after the plate material passes through the drawing and trimming processes, the middle part of the product profile on the side of the fender A-pillar is locally sunken, and the upper and lower parts of the fender A-pillar are raised. In the subsequent flanging process, instead of using the conventional vertical direct flanging, the fender A-pillar outer side is flanged along the flanging contour line 2, and the isometric convex surface 4 and the equal-R shaping surface 5 are additionally shaped on the equidistant flanging surface 3 during the flanging process. Through the isometric convex surface 4 and the equal-R shaping surface 5 shaped by shaping, the rigidity of the equidistant flanging surface 3 on the outer side of the product profile on the side of the fender A-pillar is increased, thereby greatly alleviating the phenomenon of the middle part of the product profile on the side of the fender A-pillar being locally sunken and the upper and lower parts of the fender A-pillar being raised in the subsequent process, avoiding further increase in the sinking springback amount, and thus making the produced fender meet the profile tolerance requirements, without the need for repeated adjustment of the stamping die.

[0040] Among them, the part of the isometric convex surface 4 close to the lower end of the fender A-pillar is a gradual change surface 6 with gradually decreasing convex height and eventually zero. The distance between the main part of the equal-R shaping surface 5 and the flanging contour line 2 remains consistent, and the lower part of the equal-R shaping surface 5 gradually expands the distance between the flanging contour line 2 during the process of approaching the lower end of the fender A-pillar. During this expansion process, both the equal-R shaping surface 5 and the isometric convex surface 4 will disappear on the outer edge fold surface 31. Such design facilitates the subsequent shaping to eliminate the isometric convex surface 4 and the equal-R shaping surface 5, and the flanging contour of the lower part of the fender A-pillar remains smooth.

[0041] In the embodiment, the extension of the equal-R forming surface 5 and the equal-height raised surface 4 to the product trimming line partition position is stopped.

[0042] Meanwhile, the height of the equal-R forming surface 5 is the same as the height of the equal-height raised surface 4. Specifically, the height of the equal-height raised surface 4 is 3-50 mm. In the embodiment, the equal-R forming surface 5 is an arc surface with a central angle of 90°. In this way, when the equal-height raised surface 4 and the equal-R forming surface 5 are subsequently removed, the equal-distance flanging surface 3 can be flat, and the flanging contour line 2 does not change.

[0043] In addition, the equal-height raised surface 4 is integrally formed with the outer edge fold surface 31 on the side close to the outer edge fold surface 31.

[0044] It should be noted that the extension length of the equal-R forming surface 5 and the equal-height raised surface 4 in the embodiment includes the range in which the sinking rebound amount occurs.

[0045] The above describes the present application in combination with the best embodiment, but the present application is not limited to the above disclosed embodiments, and should cover various modifications, equivalent combinations according to the essence of the present application.

Claims

1. A fender processing method capable of correcting the springback amount of a part surface, characterized by, It comprises the following steps: S1, drawing: using a drawing die, so that the flat plate material is punched through the die to realize extension and compression deformation of the material, and becomes a fender drawing part (1) in a convex special-shaped closed form; S2, trimming: using a trimming die, removing the supplementary waste of the fender drawing part, to obtain a fender trimming part; S3, flanging and shaping: on the fender A column outer side, flanging along the flanging contour line (2) to form an equidistant flanging surface (3) and an outer edge folding surface (31), shaping an isometric convex surface (4) extending towards the two ends of the fender A column on the side of the equidistant flanging surface (3) close to the outer edge folding surface (31), and connecting the equidistant flanging surface (3) and the isometric convex surface (4) by an equal R shaping surface (5), to obtain a fender semi-finished part (11); S4, side shaping: eliminating the isometric convex surface (4) and the equal R shaping surface (5) by shaping to obtain a finished fender.

2. The fender processing method capable of correcting the springback amount of the part surface according to claim 1, characterized in that, The part of the isometric convex surface (4) close to the lower end of the fender A column is a gradual change surface (6) with gradually decreasing convex height and eventually zero.

3. The fender processing method capable of correcting the springback amount of a part surface according to claim 2, characterized by The distance between the main part of the equal R shaping surface (5) and the flanging contour line (2) remains consistent, and the lower part of the equal R shaping surface (5) gradually expands the distance between the flanging contour line (2) in the process of approaching the lower end of the fender A column, and in this expansion process, the equal R shaping surface (5) and the isometric convex surface (4) will disappear on the outer edge folding surface (31).

4. The fender processing method capable of correcting springback amount of a part surface according to any one of claims 1 to 3, characterized by The part of the equal R shaping surface (5) and the isometric convex surface (4) close to the upper end of the fender A column extends to the product trimming line division position and stops.

5. The fender processing method capable of correcting springback amount of a part surface according to claim 1, characterized by The height of the equal R shaping surface (5) is the same as the height of the isometric convex surface (4).

6. The fender processing method capable of correcting the springback amount of a part surface according to claim 5, characterized by The equal R shaping surface (5) is an arc surface with a central angle of 90°.

7. The fender processing method of claim 1 or 5 or 6, wherein The height of the isometric convex surface (4) is 3mm-50mm.

8. The fender processing method capable of correcting springback amount of a part surface according to claim 1, characterized by The included angle between the equidistant flanging surface (3) and the outer edge folding surface (31) is 90°.

9. The fender processing method of claim 1 or 8, wherein The side of the isometric convex surface (4) close to the outer edge folding surface (31) is an integral structure with the outer edge folding surface (31).

10. The fender processing method of claim 1, wherein The extension length of the equal R shaping surface (5) and the isometric convex surface (4) includes the range of the amount of sinking and rebounding.

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