Aluminum magnesium alloy riveting plug

Abstract

The invention relates to an aluminum magnesium alloy rivet plug which comprises a rivet core and a rivet shell. The rivet core comprises a rivet rod and a rivet head arranged at the top of the rivet rod; a fracture is formed in the joint of the nail head and the nail rod, and a locking groove and a first sealing ring groove are formed in the nail head; a squeezing and expanding hole and a limiting hole which are communicated with each other are formed in the nail shell from top to bottom, and the diameter of the squeezing and expanding hole is larger than that of the limiting hole; the nail rod is arranged in the extrusion hole and the limiting hole of the nail shell in a sleeved mode from top to bottom. The nail has the advantages that due to the structural design of the locking groove in the nail head, the part, extruded by the nail head, of the inner wall of the nail shell can be embedded into the locking groove of the nail head when the auxiliary hole is blocked, the nail head is firmly clamped in the nail shell, and then the stability of the nail head and the nail shell is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rivet plugs, in particular to an aluminum-magnesium alloy rivet plug. Background Art

[0002] Process holes are holes specially designed or temporarily processed to meet process requirements during the manufacturing processes of mechanical processing, assembly, and testing. Some of these process holes will eventually need to be plugged, but the requirements for plugging are high, such as the plugging of aluminum-magnesium alloy process holes in aluminum-magnesium alloy substrate engines, electric drive housings, etc.; currently, rivet plugs are generally used as plugging parts in these process holes that need to be plugged, but the existing rivet plugs have an unreasonable structural design. On the one hand, under the extrusion force of the rivet head, thin-walled holes will be squeezed and cracked; on the other hand, the existing rivet plugs still have the safety hazard of leakage. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the prior art and provides an aluminum-magnesium alloy rivet plug.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: An aluminum-magnesium alloy rivet plug, characterized by comprising a rivet core and a rivet shell; The nail core includes a nail rod and a nail head provided on the top of the nail rod; A break is provided at the junction of the nail head and the nail rod, and a locking groove is provided on the nail head; The nail shell is provided with a communicating expansion hole and a limiting hole from top to bottom, and the diameter of the expansion hole is larger than the diameter of the limiting hole; The nail rod is sleeved in the expansion hole and the limiting hole of the nail shell from top to bottom.

[0005] As a further technical solution, two locking grooves are provided on the nail head, and the two locking grooves are respectively located at the upper part and the lower part of the nail head.

[0006] As a further technical solution, a side of the nail rod close to the fracture is provided with a tooth.

[0007] As a further technical solution, a first sealing ring groove is provided on the side of the nail rod away from the fracture.

[0008] As a further technical solution, a row of second sealing ring grooves are provided on the outer wall of the nail shell.

[0009] As a further technical solution, the longitudinal section of each of the second sealing ring grooves is configured as a trapezoid.

[0010] As a further technical solution, the material of the nail core is aluminum, and the material of the nail shell is magnesium.

[0011] The beneficial effects of the present invention are as follows: the structural design of the locking groove on the nail head allows the portion of the inner wall of the nail shell that is squeezed by the nail head to be embedded in the locking groove of the nail head when the process hole is blocked, so that the nail head is firmly stuck in the nail shell, thereby improving the stability of the nail head and the nail shell; The nail rod is made of aluminum, so that it has sufficient hardness when pulled by a rivet gun during the installation of the rivet plug, thereby avoiding abnormal breakage; the nail shell is made of magnesium, which on the one hand reduces the overall weight of the rivet plug, and on the other hand improves the overall corrosion resistance of the rivet plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of an aluminum-magnesium alloy rivet plug of the present invention, in which a second sealing ring groove is provided on the rivet shell; Figure 2 This is a structural schematic diagram of an aluminum-magnesium alloy rivet plug according to the present invention, in which the rivet shell is not provided with a second sealing ring groove.

[0013] In the accompanying drawings, the components represented by the reference numerals are as follows: Nail core 1, nail rod 11, flower teeth 111, first sealing ring groove 112, nail head 12, locking groove 121, fracture 13; Nail shell 2, expansion hole 21, limiting hole 22, second sealing ring groove 23. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0015] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0016] In the description of the present application, the term "for example" is used to indicate "serving as an example, instance, or illustration." Any embodiment described as "for example" in this application is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to practice the present application as claimed. In the following description, details are set forth describing particular embodiments. It will be apparent to those skilled in the art, however, that the present application can be practiced without using these particular details. In other instances, well-known structures and processes have not been described in detail in order to avoid obscuring the present application. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features presented herein.

[0017] Embodiment 1 Referring to Figure 1-Figure 2 , the embodiment provides an aluminum-magnesium alloy rivet plug, comprising a nail core 1 and a nail shell 2; the nail core 1 comprises a nail rod 11 and a nail head 12 arranged at the top of the nail rod 11; a fracture 13 is arranged at the joint of the nail head 12 and the nail rod 11, and a locking groove 121 is arranged on the nail head 12; an extrusion hole 21 and a limiting hole 22 are arranged in the nail shell 2 from top to bottom, and the diameter of the extrusion hole 21 is greater than that of the limiting hole 22; the nail rod 11 is sleeved in the extrusion hole 21 and the limiting hole 22 of the nail shell 2 from top to bottom.

[0018] It should be noted that when the rivet plug is installed in the process hole, the nail head 12 and the nail rod 11 are broken at the fracture 13, at which time the nail head 12 is located in the nail shell 2 to achieve the plugging of the process hole.

[0019] In order to improve the hardness and corrosion resistance while reducing the weight, the material of the nail core 1 is aluminum, and the material of the nail shell 2 is magnesium. Because the electrochemical corrosion potential of magnesium alloy is relatively low compared with steel and aluminum materials, and the electrochemical corrosion feature is divergent and penetrating type, when the process hole of the magnesium alloy material component directly contacts the steel and aluminum material rivet plug, it will seriously affect the reliability of the rivet plug's durable plugging performance. In order to ensure the long-term durability and plugging reliability of the magnesium alloy component process hole, a first protective layer is arranged on the surface of the nail shell 2 to improve the insulation and friction coefficient, and when the nail shell 2 with the first protective layer directly contacts the process hole machining surface without a protective coating, the two contacting metals are equal potential and similar materials, which completely avoids the problem of electrochemical corrosion caused by the potential difference between metals; Correspondingly, the surface of the nail core 1 is provided with a second protective layer (the function of the second protective layer is to adjust the friction coefficient and anti-wear) to contact the nail shell 2 with the first protective layer. Although the first protective layer and the second protective layer will be damaged to a certain extent during the rivet installation process, the shell can avoid or delay the electrochemical corrosion between the nail core 1 and the nail shell 2 to a certain extent, thereby ensuring the long-term reliability of the rivet plug sealing performance.

[0020] The structure of this embodiment allows the portion of the inner wall of the nail shell 2 that is squeezed by the nail head 12 to fit into the locking groove 121 of the nail head 12 when the process hole is blocked, so that the nail head 12 is firmly fixed in the nail shell 2, thereby improving the stability of the nail head 12 and the nail shell 2. Furthermore, the nail head 12 is provided with two locking grooves 121, and the two locking grooves 121 are respectively located at the upper and lower parts of the nail head 12, so that the upper and lower squeezed parts of the inner wall of the nail shell 2 are respectively embedded in the locking grooves 121 on the corresponding sides, thereby improving the stability of the nail shell 2 and the nail core 1; See Figure 1-Figure 2 In the specific implementation process, a flower tooth 111 is provided on the side of the nail rod 11 close to the fracture 13, and the flower tooth 111 is arranged along the circumferential direction of the nail rod 11, so that when the rivet plug is installed in the process hole, the nail rod 11 is interference-fitted with the limiting hole 22 of the nail shell 2 through the flower tooth 111, thereby preventing the nail core 1 from being separated from the nail shell 2. At the same time, the flower tooth 111 can fill the gap between the nail rod 11 and the inner wall of the nail shell 2, thereby reducing the leakage channel and improving the sealing performance.

[0021] See Figure 1-Figure 2 In the specific implementation process, a first sealing ring groove 112 is provided on the side of the nail rod 11 away from the fracture 13, which is used to fix the nail rod 11 on the rivet gun when the rivet plug is installed to improve the stability of the operation.

[0022] See Figure 1 In the specific implementation process, a row of second sealing ring grooves 23 are opened on the outer wall of the nail shell 2, so that when the nail shell 2 undergoes extrusion and expansion deformation, the squeezed part of the inner wall of the process hole can be embedded in the second sealing ring groove 23, which not only improves the firmness of the rivet plug, but also plays a good sealing role.

[0023] Furthermore, the longitudinal cross-section of each of the second sealing ring grooves 23 is constructed as a trapezoid, so that after the rivet plug is installed, the direction of the force between the outer wall of the nail shell 2 and the process hole is opposite to the direction of the force between the inner wall of the nail shell 2 and the nail head 12, thereby improving the stability of the rivet plug between the process holes.

[0024] The present invention is achieved in that: When installing the rivet plug of this embodiment, the nail shell 2 is first placed in the process hole to be blocked, and then a special rivet gun is used to rivet the rivet plug so that the nail head 12 is inserted into the expansion hole 21, and the nail shell 2 is expanded and deformed so that the nail shell 2 is firmly stuck in the process hole; In the above process, the squeezed portion of the inner wall of the process hole can be embedded in the second sealing ring groove 23, thereby improving the firmness of the rivet plug while having a high sealing effect; at the same time, after the bottom of the nail head 12 reaches the limiting hole 22, the nail rod 11 and the nail head 12 are broken at the fracture 13, so that the nail head 12 remains in the nail shell 2. At this time, the squeezed portion of the inner wall of the nail shell 2 is embedded in the locking groove 121.

[0025] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0026] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0027] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. An aluminum-magnesium alloy rivet plug, characterized in that: It comprises a nail core (1) and a nail shell (2); The nail core (1) comprises a nail rod (11) and a nail head (12) provided on the top of the nail rod (11); A fracture (13) is provided at the junction of the nail rod (11) and the nail head (12), and a locking groove (121) is provided on the nail head (12); The nail shell (2) is provided with a communicating extrusion hole (21) and a limiting hole (22) from top to bottom, and the diameter of the extrusion hole (21) is larger than the diameter of the limiting hole (22); The nail rod (11) is sleeved from top to bottom in the expansion hole (21) and the limiting hole (22) of the nail shell (2).

2. The aluminum-magnesium alloy rivet according to claim 1, characterized in that: The nail head (12) is provided with two locking grooves (121), and the two locking grooves (121) are respectively located at the upper part and the lower part of the nail head (12).

3. The aluminum-magnesium alloy rivet plug according to claim 2, characterized in that: A flower tooth (111) is provided on one side of the nail rod (11) close to the fracture (13).

4. The aluminum-magnesium alloy rivet according to claim 3, characterized in that: A first sealing ring groove (112) is provided on the side of the nail rod (11) away from the fracture (13).

5. The aluminum-magnesium alloy rivet according to claim 1, characterized in that: The outer wall of the nail shell (2) is provided with a row of second sealing ring grooves (23).

6. The aluminum-magnesium alloy rivet plug according to claim 5, characterized in that: The longitudinal section of each of the second sealing ring grooves (23) is constructed in a trapezoidal shape.

7. The aluminum-magnesium alloy rivet according to any one of claims 1 to 6, characterized in that: The material of the nail core (1) is aluminum, and the material of the nail shell (2) is magnesium.

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