Car body nut pressing rivet device capable of increasing bearing capacity

Abstract

The utility model relates to a vehicle body nut pressing rivet device capable of increasing bearing capacity. The vehicle body nut pressing rivet device comprises an upper pressing die, a nut, a plate and a lower pressing die which are sequentially arranged from top to bottom. Under the action of pressure, the upper pressing die moves downwards, the lower pressing die moves upwards, and the upper pressing die and the lower pressing die extrude each other to press and rivet the nut onto the plate; the nut is square, and a square groove is formed in the bottom of the nut; the upper part of the lower pressing die is provided with a square boss matched with the groove; the upper pressing die and the lower pressing die extrude each other to enable the plate to be embedded into the square groove of the nut to form curved surface contact. According to the utility model, the bearing capacity, the accuracy and the product quality of pressure riveting connection are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile covering production, and specifically relates to a body nut press-in device with increased bearing capacity. BACKGROUND

[0002] In the production process of automobile covering and body, it is often required to firmly connect nuts to metal plates. Most of the traditional connection methods adopt welding method. However, in some specific cases, such as the connection of steel nuts and dissimilar metal plates, the welding method is not applicable. At this time, the press-in process needs to be used to realize the connection.

[0003] The press-in process is a technology for pressing nuts into plates through the mutual extrusion of upper and lower molds. This connection method can make the nuts bear certain load and meet the connection requirements of automobile body parts. However, the traditional press-in process and device have limitations in bearing capacity, especially when facing high-strength and high-standard automobile production standards, the performance is often difficult to reach the ideal state. SUMMARY

[0004] The utility model aims at overcoming the defects of the prior art and provides a body nut press-in device with increased bearing capacity to solve the problem of insufficient bearing capacity of the traditional press-in process.

[0005] In order to solve the above technical problems, the utility model is realized as follows:

[0006] A body nut press-in device with increased bearing capacity, characterized in that it comprises an upper press mold, a nut, a plate and a lower press mold arranged in sequence from top to bottom. Under the action of pressure, the upper press mold moves downward, the lower press mold moves upward, and the mutual extrusion between the upper and lower press molds presses the nut into the plate.

[0007] The nut is square, and the bottom is provided with a square groove. The upper part of the lower press mold has a square boss matched with the groove. The mutual extrusion of the upper and lower press molds embeds the plate into the square groove of the nut, forming a curved surface contact.

[0008] The body nut press-in device with increased bearing capacity is characterized in that the groove in the bottom of the nut is uniformly distributed with several pits, and the lower press mold is provided with a protrusion matched with the pit.

[0009] The body nut press-in device with increased bearing capacity is characterized in that the bottom of the upper press mold and the top of the nut are provided with a protrusion and a hole matched with each other, realizing the positioning of the upper press mold to the nut.

[0010] The utility model discloses a beneficial effect is: through above -mentioned technical scheme can see, the application provides a kind of vehicle body nut press riveting device of increasing bearing capacity, first make the lower surface of nut square recess, the bottom of square recess is provided with several pits;The lower die of nut press riveting device has the square boss that cooperates with rivet nut square recess, and the boss has the protrusion that cooperates with the pit in the pit of rivet nut recess;After press riveting is completed, plate material is extruded into the pit of square recess and concave bottom of nut, and the bearing capacity is improved with the curved surface contact between nut and plate material. BRIEF DESCRIPTION OF DRAWINGS

[0011] The utility model will be further explained in detail in connection with the drawings and embodiment:

[0012] Fig. 1 It is pressure riveting process schematic diagram;

[0013] Fig. 2 It is pressure riveting nut schematic diagram;

[0014] Fig. 3 It is pressure riveting lower die schematic diagram. DETAILED DESCRIPTION

[0015] The technical scheme of the embodiment of the application will be described clearly and completely in connection with the drawings, and obviously, the described embodiment is a part of the embodiment of the application, not all the embodiment. Based on the embodiment in the embodiment of the application, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of the application claimed.

[0016] As Figs. 1-3 Shown: a kind of vehicle body nut press riveting device of increasing bearing capacity, it includes upper die 1, nut 2, plate material 3 and lower die 4 sequentially arranged from top to bottom;Under the action of pressure, upper die moves downward, lower die moves upward, and the mutual extrusion between upper and lower die press rivet nut on plate material;

[0017] The nut is square, and the bottom is provided with square recess 5;The upper part of lower die has square boss 7 matched with recess;The mutual extrusion of upper and lower die makes plate material embed in the square recess of nut, and form curved surface contact. To enhance the connection strength with plate material, so as to improve bearing capacity.

[0018] Further, the recess in the bottom of nut is uniformly distributed with several pits 6, and the lower die is provided with protrusion 8 matched with pit.

[0019] Further, the bottom of upper die and the top of nut are provided with protrusion and hole matched with each other, to realize the positioning of upper die to nut. Ensure the accuracy and stability of press riveting process.

[0020] The application improves the structure of the nut, designs a groove and a pit on the bottom surface of the nut, cooperates with the square boss and the protrusion of the lower mold, realizes the curved surface contact between the nut and the plate, and significantly improves the bearing capacity of the rivet connection.

[0021] The upper mold of the nut riveting device is not only used for pressing the rivet nut, but also has the function of positioning the nut, ensures the accuracy and stability of the riveting process, and reduces the riveting quality problems caused by position deviation.

[0022] The riveting device is not only suitable for riveting the nut of the automobile body, but also can be used for riveting other similar plates and nuts, and has wide application prospect and adaptability.

[0023] By changing the traditional riveting process method, adopting the new nut structure and the lower mold design, more efficient riveting connection is realized, the production cost is reduced, and the production efficiency is improved.

[0024] After riveting, the plate is tightly embedded in the groove and pit of the nut to form a stable connection structure, improve the overall quality and reliability of the product, and prolong the service life.

[0025] The utility model innovatively improves the nut inner groove structure and the lower mold structure, fills the blank in the related technical field, and provides a new technical solution for the automobile cover and the automobile body production field.

[0026] The above is the embodiment provided by the application, and is not used to limit the application, although the application is described in detail with reference to the embodiment, for the person skilled in the art, the technical scheme recorded in the foregoing embodiment can be modified, or some technical features can be replaced, but any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A vehicle body nut pressing and riveting device to increase load-bearing capacity, characterized in that: It includes an upper die, a nut, a plate, and a lower die arranged from top to bottom; under pressure, the upper die moves downward and the lower die moves upward, and the mutual squeezing between the upper and lower dies presses the nut onto the plate. The nut is square with a square groove at its bottom; the upper part of the lower die has a square boss that matches the groove; the upper and lower dies press against each other to make the plate embed into the square groove of the nut, forming a curved surface contact.

2. The vehicle body nut riveting device for increasing load-bearing capacity according to claim 1, characterized in that: The nut has a groove at the bottom with several pits evenly distributed inside, and the lower die has a protrusion that matches the pits.

3. The vehicle body nut riveting device for increasing load-bearing capacity according to claim 1, characterized in that: The bottom of the upper die and the top of the nut are provided with matching protrusions and holes to achieve the positioning of the nut by the upper die.

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