Riveting stud for connecting aluminum alloy sections

Abstract

The invention relates to the technical field of riveting parts, in particular to a riveting stud for connecting aluminum alloy profiles, which comprises a stud body, the outer wall of the stud body is provided with limiting teeth distributed along the axial direction, at least one end of the stud body is provided with a mouth part for embedding a profile, and the surface of the stud body close to the mouth part is annularly provided with a containing groove. A pressing rivet block is arranged in the containing groove in a sleeved mode, and an inner hole is formed in the middle of the stud body in a penetrating mode. The polygonal petal-shaped pressing rivet blocks are matched with the containing grooves, the contact area is increased compared with a traditional annular flange, and therefore the fixing effect is better, and looseness is not likely to happen; and through the synergistic effect of the limiting teeth and the petal pressing rivet blocks, the push-out force resistance and the rotation prevention capacity are effectively improved, and the high-strength connection requirement of the aviation aluminum profile support is met.

Description

Technical Field

[0001] The present invention relates to the technical field of riveted parts, and in particular to a riveted stud for connecting aluminum alloy profiles. Background Art

[0002] Self-clinching nut standoffs, also known as self-clinching studs or nut standoffs, are a type of fastener used in sheet metal, thin plates, chassis, and cabinets.

[0003] Traditional self-clinching studs often utilize an annular flange structure, resulting in a small contact area with the profile and low rotational torque after riveting. For example, M4 studs, for example, are prone to loosening under vibration. For example, when traditional studs are used in automotive aluminum alloy chassis connectors, the loosening rate reached 30% after 500 vibration tests. Furthermore, traditional self-clinching studs rely solely on friction locking with straight teeth in the axial direction, resulting in insufficient push-out resistance and unable to meet the requirements of high-strength connections. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the present invention aims to provide a riveted stud for connecting aluminum alloy profiles to improve the torsion resistance and push-out resistance of the connection with the aluminum alloy profiles.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A riveted stud for connecting aluminum alloy profiles includes a stud body, the outer wall of the stud body is provided with axially distributed limiting teeth, at least one end of the stud body is provided with a mouth for embedding the profile, a surface of the stud body is circumferentially provided with a receiving groove near the mouth, a rivet block is sleeved in the receiving groove, and an inner hole is provided through the middle of the stud body.

[0007] In some embodiments of the present invention, the inner side wall of the containing tank is provided with a silicone strip and a metal mesh embedded in the silicone strip, and the metal mesh is an annular corrugated structure.

[0008] In some embodiments of the present invention, the inner hole is a threaded hole or a smooth hole, and the inner wall of the threaded hole is provided with a standard thread.

[0009] In some embodiments of the present invention, the rivet block is a polygonal petal-shaped structure, the edges of the petal-shaped structure are serrated, and after riveting, a chimeric structure is formed with the mounting hole of the aluminum alloy profile.

[0010] In some embodiments of the present invention, the limiting teeth are shark tooth structures extending horizontally or obliquely along the radial direction.

[0011] In some embodiments of the present invention, when the limiting teeth are in an inclined extended state, the inclination angle thereof is 15°-30°, and the tooth height is 0.3-0.8 mm.

[0012] In some embodiments of the present invention, a conical guide platform is installed at the end of the mouth along the axial direction of the stud body, and anti-slip grooves are formed on the conical surface of the conical guide platform.

[0013] In some embodiments of the present invention, the cone angle of the conical guide platform is 120°-140°, the anti-slip pattern is a ridge spirally distributed along the conical surface, the height of the ridge is 0.1-0.3 mm, and the spacing between adjacent ridges is 0.5-1.5 mm.

[0014] In some embodiments of the present invention, the axial thickness of the silicone strip is 1.2-1.5 times the depth of the groove, the outer diameter of the silicone strip is 0.5-1 mm larger than the diameter of the stud body, and the peak height of the metal mesh is 1 / 3 of the thickness of the silicone strip.

[0015] In some embodiments of the present invention, the stud body, the mouth and the rivet block are all integrally formed of an aluminum alloy material, and the hardness of the aluminum alloy material is HB60-90 and the tensile strength is ≥200 MPa.

[0016] Beneficial effects of the present invention:

[0017] Compared with the traditional method, this technical solution adopts polygonal petal-shaped rivet blocks in combination with the receiving groove, and the contact area is improved compared with the traditional annular flange, so the fixing effect is better and not easy to loosen; through the coordinated action of the limiting teeth and the petal rivet blocks, the anti-push-out force and anti-rotation ability are also effectively improved, meeting the high-strength connection requirements of aviation aluminum profile brackets. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the working process of riveting the present invention with a profile;

[0020] Figure 2 It is a three-dimensional view of the first embodiment of the present invention;

[0021] Figure 3 This is a three-dimensional view of Example 2 of the present invention;

[0022] Figure 4 It is a side view of the second embodiment of the present invention;

[0023] Figure 5 This is a three-dimensional view of the rivet block in the present invention;

[0024] Figure 6 It is an internal cross-sectional view of the silicone strip in the present invention.

[0025] In the figure: 1. Stud body; 11. Limiting teeth; 12. Mouth; 13. Inner hole; 14. Rivet block; 15. Receiving groove; 16. Conical guide platform; 17. Anti-slip groove; 2. Profile; 3. Upper tooling; 4. Lower tooling; 5. Silicone strip; 51. Metal mesh. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] Example 1:

[0028] like Figure 1 、 Figure 2 As shown, a riveted stud for connecting aluminum alloy profiles includes a stud body 1, and the outer wall of the stud body 1 is provided with limiting teeth 11 distributed along the axial direction.

[0029] At least one end of the stud body 1 is provided with a mouth 12 for insertion into the profile 2. This mouth 12 serves as a guide for the stud, allowing for easy alignment and insertion into the prefabricated mounting hole in the aluminum alloy profile 2. Its size is typically slightly smaller than the mounting hole, facilitating initial positioning. Furthermore, the structure of the mouth 12 provides space and guidance for the plastic flow of the profile 2 material during the subsequent riveting process.

[0030] A circumferential groove 15 is formed on the surface of the stud body 1 near the mouth 12. A compression block 14 is sleeved within the groove 15. The groove 15 provides a space where the aluminum alloy material surrounding the mounting hole deforms under pressure and flows into the groove 15 during the compression riveting process. The compression block 14 plays a key role in this process. It is either compressed or its specific shape expands / deforms under pressure, further squeezing and locking the profile material flowing into the groove 15, forming a strong mechanical locking structure and significantly improving the pull-out resistance.

[0031] The middle of the stud body 1 is penetrated by an inner hole 13, which provides the core function of the stud - connection. It can be used to pass bolts, screws, or itself as a threaded hole to cooperate with other threaded parts to achieve a fastening connection between the aluminum alloy profile 2 and other components. Figure 1 As shown, after the stud body 1 is connected to the profile 2, the upper and lower ends of the stud body 1 are respectively connected and locked with the upper tooling 3 and the lower tooling 4 by screws to achieve functional expansion.

[0032] As an example, inner hole 13 may be a threaded hole or a smooth hole, with the inner wall of the threaded hole having a standard thread. Threaded connection is one of the most common fastening methods. When inner hole 13 is a threaded hole, a screw or bolt can be directly inserted, simplifying assembly. Standard threads ensure universality and interchangeability of the connection. When inner hole 13 is a smooth hole, it can be used with bolts and nuts, or for inserting pins for positioning or connection.

[0033] As an example, the limiting teeth 11 are shark-tooth structures extending horizontally in the radial direction. During the riveting process, the limiting teeth 11 are designed to embed into the material of the hole wall of the aluminum alloy profile 2, forming a mechanical interlock. This greatly increases the axial pull-out resistance and torsional torque between the stud body 1 and the profile 2, ensuring the stability and reliability of the connection and preventing the stud from loosening or falling off.

[0034] As an example, Figure 5 As shown, the rivet block 14 has a polygonal, petal-like structure with serrated edges. After riveting, it forms a chiseled structure with the mounting hole of the aluminum alloy profile 2. The polygonal, petal-like structure makes it easier for the "petals" of the rivet block 14 to deflect, expand, or deform outward or in a specific direction under axial pressure. During the deformation process, the serrated edge structure can more deeply and firmly "bite" the aluminum alloy profile material that flows into the groove 15 and deforms, forming a complex mechanical interlock, further enhancing the reliability of the connection, especially the torsional resistance.

[0035] When this embodiment 1 is used, the mouth 12 of the riveted stud is first aligned with the prefabricated mounting hole on the aluminum alloy profile 2, and then axial pressure is applied (through a riveting device), and the mouth 12 guides the stud body 1 into the hole. As the pressure increases, the limiting teeth 11 (horizontal shark teeth) begin to press into and embed into the aluminum alloy material of the hole wall of the profile 2, providing a preliminary anti-torsion lock. At the same time, the aluminum alloy material at the edge and below the mounting hole undergoes plastic deformation under pressure and begins to flow into the groove 15. The inflowing material squeezes the polygonal petal-shaped rivet block 14. The petal structure of the rivet block 14 is deformed / expanded outward or in a specific direction under pressure, and its serrated edges further bite and embed the inflowing aluminum alloy material. The profile material fills the groove 15 and is firmly locked by the deformed rivet block 14, forming a powerful mechanical interlocking structure that provides the main anti-pull-out force and auxiliary anti-torsion force. After the pressure is removed, the stud is firmly fixed to the aluminum alloy profile through the embedded cooperation between the limiting teeth 11 and the profile and the interlocking structure formed in the groove 15. The inner hole 13 can be used for subsequent threaded connection with other components.

[0036] Example 2:

[0037] This embodiment, based on the first embodiment, increases the sealing performance (waterproof and dustproof) of the connection and a certain vibration buffering capacity while ensuring a high locking force.

[0038] like Figure 6 As shown, in some embodiments of the present invention, the inner wall of the groove 15 is sheathed with a silicone strip 5 and a metal mesh 51 embedded within the silicone strip 5. The metal mesh 51 has an annular corrugated structure. In certain applications, such as outdoor equipment, humid environments, or where an airtight or watertight connection is required, gaps may exist at the connection between the stud body 1 and the profile 2, allowing moisture, dust, or other media to intrude, causing corrosion or affecting equipment performance. Furthermore, the connection may be subject to vibration, requiring buffering and energy absorption. Therefore, the silicone strip 5 is provided, which has excellent elasticity and sealing properties. During the riveting process, the silicone strip 5 is compressed, filling the potential micro-gap between the inner wall of the groove 15 and the deformed profile 2 material, forming an effective sealing barrier. The embedded metal mesh 51 provides structural support for the silicone strip 5, preventing it from excessively deforming or being completely squeezed out under pressure. It also increases friction at the interface and may help absorb vibration energy. The corrugated structure provides better adaptability and resilience under compression.

[0039] As an example, the axial thickness of the silicone strip 5 is 1.2-1.5 times the depth of the groove 15, the outer diameter of the silicone strip 5 is 0.5-1 mm larger than the diameter of the stud body 1, and the peak height of the metal mesh 51 is 1 / 3 of the thickness of the silicone strip 5. The axial thickness of the silicone strip 5 is greater than the depth of the groove 15 to ensure that sufficient material is compressed during the riveting process to generate an effective axial sealing force. The outer diameter of the silicone strip 5 is slightly larger than the diameter of the stud body 1, which helps to maintain its position before riveting and generate radial sealing pre-pressure with the hole wall of the profile 2 during riveting. The peak height of the metal mesh 51 is approximately 1 / 3 of the thickness of the silicone strip 5. This ratio is intended to provide sufficient structural support to prevent the silicone from being excessively squeezed and failing, while maintaining the flexibility of the overall structure.

[0040] In some embodiments of the present invention, the limiting tooth 11 is a shark tooth structure extending radially and tilted. The tilted shark tooth (usually tilted away from the mouth 12) not only provides anti-torsion force, but also provides significant anti-axial pull-out force.

[0041] When the limiting tooth 11 is in an inclined extended state, its inclination angle is 15°-30° and the tooth height is 0.3-0.8mm. This parameter range defines the geometric characteristics of the inclined shark tooth. The inclination angle of 15°-30° is a balance between ensuring effective anti-pull-out force while not excessively increasing the pressing force and reducing excessive damage to the base material of the profile 2. The tooth height of 0.3-0.8mm ensures that the teeth can be effectively embedded in the aluminum alloy profile 2, forming a sufficient mechanical locking depth to adapt to profiles 2 of different thicknesses and strengths.

[0042] When this second embodiment is used, the key difference between it and the first embodiment is that the material of the profile 2 is deformed and flows into the groove 15, and the inflowing material first contacts and compresses the silicone strip 5. Under external force, the silicone strip 5 fills the tiny gap between the inner wall of the groove 15 and the deformed profile 2. The metal mesh 51 provides support for the silicone strip, limits its excessive flow, and ensures that it can still maintain a certain structural integrity and rebound potential under compression. Further pressure and / or material flow acts on the rivet block 14, causing it to deform and lock the inflowing profile 2 material to form a mechanical interlocking structure. The rivet block 14 here works in synergy with the silicone strip 5 / metal mesh 51 to jointly complete the locking and sealing. After the pressure is removed, the stud body 1 is firmly fixed. Due to the presence and compression of the silicone strip 5, an effective sealing layer is formed at the connection, and the elastic silicone also provides a certain vibration absorption and buffering effect.

[0043] Example 3:

[0044] This embodiment optimizes the installation process based on the first embodiment, and improves the alignment accuracy and installation efficiency.

[0045] like Figure 3 、 Figure 4 As shown, in some embodiments of the present invention, a conical guide platform 16 is installed at the end of the mouth 12 along the axial direction of the stud body 1, and the conical surface of the conical guide platform 16 is formed with anti-slip grooves 17. In automated assembly or situations requiring high-precision alignment, the standard mouth 12 may still have problems such as inaccurate alignment and initial slippage or rotation during insertion, affecting installation efficiency and quality. The conical guide platform 16 provides a more gradual and stable guiding slope than the mouth 12, which can more accurately and easily guide the stud into the mounting hole of the profile 2, especially when the hole diameter is closely matched with the diameter of the stud body 1. The anti-slip grooves 17 on the conical surface provide additional friction in the initial stage of insertion, preventing the stud body 1 from accidentally rotating when contacting the profile, and ensuring that the limiting teeth 11 can be embedded in the expected direction.

[0046] As an example, the cone angle of the conical guide platform 16 is 120°-140°, and the anti-slip groove 17 is a ridge distributed in a spiral along the cone surface. The height of the ridge is 0.1-0.3mm, and the spacing between adjacent ridges is 0.5-1.5mm. The larger cone angle of 120°-140° provides a stable and effective self-centering introduction function. The anti-slip groove 17 adopts the form of spirally distributed ridges, which can provide a continuous and gradual anti-slip effect during insertion. At the same time, the spiral form may help guide small rotational adjustments. The height and spacing parameters of the ridges ensure that sufficient friction is provided to contact the edge of the hole of the profile 2 to prevent slipping without excessively increasing the insertion resistance.

[0047] In some embodiments of the present invention, the stud body 1, the mouth 12 and the rivet block 14 are all integrally formed of an aluminum alloy material, the hardness of the aluminum alloy material is HB60-90, and the tensile strength is ≥200MPa. The use of an aluminum alloy material to manufacture the stud body 1 is the same as or similar to the base material of the aluminum alloy profile 2, which can minimize the risk of galvanic corrosion. The hardness range of HB60-90 ensures that the stud body 1 has sufficient rigidity to support the limiting teeth 11 and the rivet structure, while having a sufficient hardness difference relative to the profile 2 to achieve effective embedding and locking, but not so hard that the profile cracks during rivet. The tensile strength of ≥200MPa ensures that the stud body 1 can withstand the expected tensile load.

[0048] When this second embodiment is used, the conical guide platform 16 of the stud body 1 is first aligned with the mounting hole of the aluminum alloy profile 2. The larger cone angle allows the stud body 1 to automatically slide in and center at the hole opening even if the initial alignment is slightly deviated. When the initial pressure is applied and the conical guide platform 16 contacts the hole opening of the profile 2, the anti-slip grooves 17 on its surface contact the profile 2 to generate friction, effectively preventing the stud body 1 from rotating unnecessary before entering the hole, ensuring that the subsequent limiting teeth 11 are embedded in the designed direction. As the pressure increases, the conical guide platform 16 completes the guidance, the mouth 12 enters, and the inclined limiting teeth 11 begin to embed into the hole wall of the profile 2. The subsequent process is the same as that of the first embodiment: the material of the profile 2 flows into the receiving groove 15, and the rivet block 14 deforms and locks the material to form a chimeric structure. After the pressure is removed, the stud body 1 is firmly fixed. Due to the effects of the conical guide platform 16 and the anti-slip grooves 17, the entire installation process is smoother, more precise, and more reliable.

[0049] The key difference between the embodiment 1 and the embodiment 1 is that a conical guide platform 16 with anti-slip grooves 17 is added to the mouth 12, thereby optimizing the installation guidance and initial positioning anti-rotation performance.

[0050] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0051] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in similar ways. As long as they do not deviate from the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A riveted stud for connecting aluminum alloy profiles, comprising a stud body, characterized in that: The outer wall of the stud body is provided with limiting teeth distributed along the axial direction, and at least one end of the stud body is provided with a mouth for embedding the profile. A groove is circumferentially opened on the surface of the stud body near the mouth, and a rivet block is sleeved in the groove. An inner hole is opened through the middle of the stud body.

2. A riveted stud for connecting aluminum alloy profiles according to claim 1, characterized in that: The inner side wall of the containing tank is provided with a silicone strip and a metal mesh embedded in the silicone strip, and the metal mesh is an annular corrugated structure.

3. The riveted stud for connecting aluminum alloy profiles according to claim 1, characterized in that: The inner hole is a threaded hole or a smooth hole, and the inner wall of the threaded hole is provided with a standard thread.

4. The riveted stud for connecting aluminum alloy profiles according to claim 1, characterized in that: The rivet block is a polygonal petal-shaped structure, the edge of the petal-shaped structure is serrated, and after riveting, a chimeric structure is formed with the mounting hole of the aluminum alloy profile.

5. The riveted stud for connecting aluminum alloy profiles according to claim 1, characterized in that: The limiting teeth are shark tooth structures extending horizontally or obliquely along the radial direction.

6. The riveted stud for connecting aluminum alloy profiles according to claim 5, characterized in that: When the limiting teeth are in an inclined extended state, the inclination angle thereof is 15°-30°.

7. The riveted stud for connecting aluminum alloy profiles according to claim 1, characterized in that: A conical guide platform is installed at the end of the mouth along the axial direction of the stud body, and anti-slip grooves are formed on the conical surface of the conical guide platform.

8. The riveted stud for connecting aluminum alloy profiles according to claim 7, characterized in that: The cone angle of the conical guide platform is 120°-140°, the anti-slip pattern is ridges spirally distributed along the cone surface, the height of the ridges is 0.1-0.3 mm, and the spacing between adjacent ridges is 0.5-1.5 mm.

9. The riveted stud for connecting aluminum alloy profiles according to claim 2, characterized in that: The axial thickness of the silicone strip is 1.2-1.5 times the depth of the groove, the outer diameter of the silicone strip is 0.5-1 mm larger than the diameter of the stud body, and the peak height of the metal mesh is 1 / 3 of the thickness of the silicone strip.

10. The riveted stud for connecting aluminum alloy profiles according to claim 1, characterized in that: The stud body, the mouth and the rivet block are all integrally formed of aluminum alloy.

Images