A stamping structure for suppressing material spillage at the flange and rounded corners

Abstract

This utility model discloses a stamping structure for suppressing material overflow at the flanged corner, comprising: a sheet metal body; a vertical wall, vertically disposed on the edge of the sheet metal body, the height of the vertical wall being 4-8mm; an offset plane, extending outward in the horizontal direction, the length of the offset plane being 3-5mm; a first transition fillet, provided on the vertical wall; and a second transition fillet, provided on the offset plane; the first transition fillet and the second transition fillet are connected, which can effectively suppress material overflow at the flanged corner when there is insufficient material, improve the appearance quality of large automotive body panels, increase acceptance satisfaction, and reduce after-sales maintenance costs.

Description

Technical Field

[0001] This utility model belongs to the field of stamping technology, and in particular relates to a stamping structure that suppresses material spillage at the rounded corners of the flange. Background Technology

[0002] In the process of realizing this utility model, the inventors discovered that the prior art has at least the following problems:

[0003] For large automotive body panels, insufficient material during the stamping process can cause material spillage at the rounded corners, which is a quality defect that affects the overall aesthetics of the car.

[0004] In the process of flanging and edge-flaring large automotive body panels (fenders, side panels, door panels, etc.), material flow instability and uneven internal stress distribution cause material spillage at the rounded corners, resulting in raised wrinkles of 0.3-1.1mm at the corners. For example, consider the fastening claws at the A-pillar overlap of the fender (this feature is found in...). Figure 1 (As indicated), to form the product features here, it is necessary to form them through the side flanging process. This type of rounded corner feature with less material flanging is prone to the problem of material overflowing at the rounded corner during the forming process.

[0005] This wrinkling at the rounded corners is a serious appearance quality defect. Moreover, since most products currently feature straight-wall structures, the resulting material spillage at the rounded corners is difficult to repair by fitters, resulting in low efficiency and high cost. It seriously affects the smoothness of the paint surface and the precision of assembly of the entire vehicle. This problem is a serious appearance quality issue that requires additional repair costs, increasing the cost by more than 25%.

[0006] CN209006489U - A stamping die suitable for stamping rounded corners of copper busbars discloses a stamping die suitable for stamping rounded corners of copper busbars, including an upper die base, an upper clamping plate, a cutting punch, a stripper plate, a lower die plate, and a lower die base. The cutting punch includes a rounded corner punching edge, a sheet metal cutting edge, and a punch fixing protrusion. The lower die plate is provided with an insert fixing groove and a positioning block fixing groove. A punch fixing insert is provided in the insert fixing groove. A cutting positioning block is provided in the positioning block fixing groove. A stamping reserved groove for the cutting punch to pass through is also provided between the insert fixing groove and the positioning block fixing groove. However, this does not solve the above-mentioned technical problems. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a stamping structure that suppresses material overflow at the flange and rounded corner, which can effectively suppress the situation of insufficient material overflow at the flange and rounded corner, improve the appearance quality of large automotive body panels, increase acceptance satisfaction, and reduce after-sales maintenance costs.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a stamping structure for suppressing material spillage at the flange rounded corners, having:

[0009] Sheet metal body;

[0010] A vertical wall is vertically installed on the edge of the sheet metal body, and the height of the vertical wall is 4-8mm;

[0011] An offset plane extends outward in a horizontal direction, and the length of the offset plane is 3-5 mm;

[0012] A first transition fillet is provided on the vertical wall;

[0013] The second transition fillet is provided on the offset plane; the first transition fillet is connected to the second transition fillet.

[0014] The height of the vertical wall is 6mm.

[0015] The length of the bias plane is 4 mm.

[0016] The radii of the first and second transition fillets are both 2 mm.

[0017] The vertical wall extends from the rounded corner of the sheet metal body along the working direction of the forming process.

[0018] The sheet metal body includes fenders, side panels, and door panels.

[0019] One of the above technical solutions has the following advantages or beneficial effects: it can effectively suppress the situation of insufficient material overflowing at the edge and rounded corners, improve the appearance quality of large automotive body panels, increase acceptance satisfaction, and reduce after-sales maintenance costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the stamping structure for suppressing material spillage at the flange rounded corners provided in this embodiment of the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the stamping structure for suppressing material spillage at the rounded corners of the flange;

[0022] The markings in the above figures are: 1. Vertical wall, 2. First transition fillet, 3. Second transition fillet, 4. Offset plane, 5. Sheet metal body. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] See Figures 1-2 A stamping structure for suppressing material spillage at the flanged corner includes: an offset plane 45; a vertical wall 1, vertically disposed on the edge of the offset plane 45, with a height of 4-8mm; an offset plane extending outward in a horizontal direction, with a length of 3-5mm; a first transition fillet 2, provided on the vertical wall 1; and a second transition fillet 3, provided on the offset plane. The first transition fillet 2 and the second transition fillet 3 are connected, which can effectively suppress material spillage at the flanged corner due to insufficient material, improve the appearance quality of large automotive body panels, increase acceptance satisfaction, and reduce after-sales maintenance costs.

[0026] The height of the vertical wall 1 is 6mm. The length of the offset plane is 4mm. The radii of the first transition fillet 2 and the second transition fillet 3 are both 2mm. This countersunk feature consists of three parts: the vertical wall 1, the fillet transition area, and the offset plane, which together constitute the process insert surface of the forming process. The vertical wall 1 serves as the initial guide wall for the flanging material, constraining the flow direction of the material and preventing radial overflow. The arc transition area reduces the flow resistance of the material during the forming process and eliminates wrinkles caused by stress concentration. The offset plane, by offsetting outward by 4mm, forms a dynamic material storage space to accommodate excess sheet material generated during flanging with insufficient material. The three features work together to solve the problem of material overflow at the fillet corner during flanging with insufficient material.

[0027] The vertical wall 1 extends from the rounded corner of the offset plane 45 along the working direction of the forming process.

[0028] Offset plane 45 includes fenders, side panels, and door panels, and is used in large automotive body panels.

[0029] By adopting the above structure, the situation of insufficient material overflowing at the flange and rounded corners can be effectively suppressed, improving the appearance quality of large automotive body panels, increasing acceptance satisfaction, and reducing after-sales maintenance costs.

[0030] Example 2

[0031] A stamping structure for suppressing material spillage at the flanged corners; the process involves a special recessed platform feature, the location of which is as follows: Figure 1As shown, the specific form is as follows: Figure 2 As shown, a vertical wall 1 with a height of 6mm extends from the product's rounded corner along the positive shaping direction, and a horizontal plane offset outward by 4mm is formed. This plane is connected by two rounded corners with a radius of 2mm (R=2mm) to form a rounded transition area.

[0032] The vertical wall 1 is an extension surface stretched from the rounded corner of the product along the working direction of the forming process. The curvature of this extension surface is the same as the curvature of the rounded corner horizontal line. The length of this extension surface is 6mm. Next is the offset plane, which is a plane offset outward from the product by 4mm and is a flat plane. The stretching direction of this plane is also along the forming direction. Finally, the vertical wall 1 and the offset plane are connected by an arc transition area, thus forming the recessed platform feature proposed in this utility model.

[0033] The settling platform consists of three parts: a vertical wall 1, a rounded transition zone, and an offset plane, which together form the process insert surface for the forming process. The vertical wall 1 serves as the initial guide wall for the flanging material, constraining the material flow direction and preventing radial overflow. The rounded transition zone reduces material flow resistance during forming, eliminating wrinkles caused by stress concentration. The offset plane, offset outward by 4mm, creates a dynamic storage space to accommodate excess sheet material generated during flanging with insufficient material. These three features work together to solve the problem of material overflow at the rounded corners during flanging with insufficient material.

[0034] By adopting the above structure, the situation of insufficient material overflowing at the flange and rounded corners can be effectively suppressed, improving the appearance quality of large automotive body panels, increasing acceptance satisfaction, and reducing after-sales maintenance costs.

[0035] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 utility model.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A press structure for suppressing the flanging of a round cornered stock, characterized by, have: Sheet metal body; A vertical wall is vertically installed on the edge of the sheet metal body, and the height of the vertical wall is 4-8mm; An offset plane extends outward in a horizontal direction, and the length of the offset plane is 3-5 mm; A first transition fillet is provided on the vertical wall; The second transition fillet is provided on the offset plane; the first transition fillet is connected to the second transition fillet.

2. The press structure for suppressing the flange of the round corner material according to claim 1, wherein The height of the vertical wall is 6mm.

3. The press structure for suppressing the flange of the round corner material according to claim 2, wherein The length of the bias plane is 4 mm.

4. The press structure for suppressing the flange of the round corner material according to claim 3, wherein The radii of the first and second transition fillets are both 2 mm.

5. The press structure for suppressing the flange of the round corner material according to claim 4, wherein The vertical wall extends from the rounded corner of the sheet metal body along the working direction of the forming process.

6. The press structure for suppressing the flange of the round corner material according to claim 5, wherein The sheet metal body includes fenders, side panels, and door panels.

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