Die structure applied to bushing riveting

Abstract

The die structure applied to bushing riveting comprises a punch and a lower die body matched with the punch, the lower die body is used for supporting a product, and the punch is used for punching a bushing so that the bushing can be riveted into the product; an arc-shaped part is arranged at the lower end of the punch, a guide part is arranged between the arc-shaped part and the lower surface of the punch, the chamfer angle of the guide part ranges from 1.3 mm to 1.5 mm, a guide inclined face connected with the guide part is further arranged on the lower surface of the punch, and the inclination angle of the guide inclined face ranges from 3 degrees to 5 degrees. And the bushing can be riveted on a product from a vertical state to a flanging and pressing state only through one-time punching, so that the production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile hardware stamping, in particular to a die structure used for riveting of bushings. Background Art

[0002] Figure 4 The process flow of the existing technology currently requires two steps to complete the riveting process of hardware products. The left picture shows the first step, pre-bending the bushing at 45 degrees, and the right picture shows the second step, flanging the bushing to press the edge of the bushing. This production method is inefficient and requires two types of punches. It is also easy to miss a step during production, resulting in product scrapping. Utility Model Content

[0003] In order to solve the above problems, the present technical solution provides a mold structure applied to bushing riveting.

[0004] To achieve the above purpose, the technical solution is as follows:

[0005] A die structure used for bushing riveting comprises a punch and a lower die body matched with the punch, wherein the lower die body is used to support the product, and the punch is used to punch the bushing to rivet it into the product;

[0006] An arc portion is provided at the lower end of the punch, and a guide portion is provided between the arc portion and the lower surface of the punch. The chamfer of the guide portion is between 1.3-1.5 mm. The lower surface of the punch is also provided with a guide slope connected to the guide portion, and the inclination angle of the guide slope is between 3-5 degrees.

[0007] In some embodiments, the diameter of the arc portion is between 11-13 mm.

[0008] In some embodiments, the upper end surface of the lower mold body is provided with a step.

[0009] The beneficial effects of this application are:

[0010] The present application improves the riveting tooling structure, and only one punch is required to change the bushing from a vertical state to a flanged and compressed state and rivet it onto the product, thereby greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0012] Figure 1 It is a schematic diagram of the exploded structure of an embodiment of the utility model;

[0013] Figure 2 It is a schematic diagram of the punch structure of an embodiment of the utility model;

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of an embodiment of the utility model;

[0015] Figure 4 It is a schematic diagram of the prior art structure. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0017] Please refer to Figure 1-3 As shown, the die structure used for bushing riveting includes a punch 1 and a lower die body 2 matched with the punch 1, the lower die body 2 is used to support the product 3, and the punch 1 is used to punch the bushing 4 to rivet it into the product 3;

[0018] The lower end of the punch 1 is provided with an arc portion 5, and a guide portion 6 is provided between the arc portion 5 and the lower surface of the punch 1. The chamfer of the guide portion 6 is between 1.3-1.5 mm. The lower surface of the punch 1 is also provided with a guide slope 7 connected to the guide portion 6, and the inclination angle of the guide slope 7 is between 3-5 degrees.

[0019] When the punch moves downward, since the lower end face of the punch is designed with a guide part with an R angle of 1.5mm, the vertical bushing will be limited by its left and right edges and expand outward. As the punch continues to move downward, the 4-degree inclined guide slope continues to turn the edge outward until the punch is closed. At this time, the edge of the bushing will be flanged 90 degrees. The structure of this application is streamlined, which effectively reduces maintenance costs. It can be completed in another process, thereby improving production efficiency.

[0020] In this structure, the flanging punch is optimized, and the punch contacting the bushing surface has a 3-5° forming slope (originally a flat surface) added to play a guiding role. If the slope of the slope is not within this range, the flanging effect may not be achieved in one go.

[0021] In this embodiment, the diameter of the arc portion 5 is between 11 and 13 mm, which is conducive to perforating the product.

[0022] In this embodiment, the upper end surface of the lower die body 2 is provided with a step 8 to cooperate with the punch to achieve mold closing.

[0023] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application. Other principles and basic structures that are the same or similar to those of the present application are within the protection scope of the present application.

Claims

1. Die structure used for bushing riveting, It is characterized in that It comprises a punch (1) and a lower die body (2) cooperating with the punch (1), wherein the lower die body (2) is used to support a product (3), and the punch (1) is used to punch a bushing (4) so ​​as to rivet it into the product (3); The lower end of the punch (1) is provided with an arc-shaped portion (5), and a guide portion (6) is provided between the arc-shaped portion (5) and the lower surface of the punch (1), and the chamfer of the guide portion (6) is between 1.3 and 1.5 mm. The lower surface of the punch (1) is also provided with a guide inclined surface (7) connected to the guide portion (6), and the inclination angle of the guide inclined surface (7) is between 3 and 5 degrees.

2. The mold structure for bushing riveting according to claim 1, Features: The diameter of the arc-shaped portion (5) is between 11 and 13 mm.

3. The mold structure for bushing riveting according to claim 2, Features: The upper end surface of the lower mold body (2) is provided with a step (8).

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