Riveting stud for connecting aluminum alloy sections
By employing a mechanical interlocking structure in aluminum alloy profile connections, which combines polygonal petal-shaped pressing blocks with grooves, the problem of easy loosening of traditional pressing studs is solved, achieving high-strength connection stability and reliability, especially in aerospace applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU INDAL PARK XINKAI PRECISION FASTENERSCO
- Filing Date
- 2025-06-11
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional press-fit studs are prone to loosening in aluminum alloy profile connections, and their resistance to torsion and push-out is insufficient, failing to meet the requirements for high-strength connections.
A polygonal petal-shaped pressing block is used in conjunction with a groove, along with limiting teeth and silicone strips, to form a mechanically fitted structure, increasing the contact area and pull-out resistance. In some embodiments, a tapered guide stage is used to improve alignment accuracy and anti-rotation performance.
It improves the torsional and push-out resistance of aluminum alloy profile connections, enhances the stability and reliability of the connections, meets the high-strength connection requirements of aviation aluminum profile brackets, and provides sealing and vibration buffering effects in some embodiments.
Smart Images
Figure CN224245233U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of riveting technology, specifically to a riveting stud for connecting aluminum alloy profiles. Background Technology
[0002] Press-fit nut studs, also known as press-fit studs or nut studs, are a type of fastener used in sheet metal, thin plates, chassis, and cabinets.
[0003] Traditional press-fit studs often employ a ring-shaped flange structure, resulting in a small contact area with the profile and low rotational torque after press-fitting. For example, M4 studs are prone to loosening under vibration. For instance, when using traditional studs in automotive aluminum alloy chassis connectors, the loosening rate reached 30% after 500 vibration tests. Furthermore, traditional press-fit studs rely solely on spur tooth friction for axial locking, which lacks sufficient resistance to pull-out force and cannot meet the requirements for high-strength connections. Utility Model Content
[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the purpose of this invention is to provide a riveting stud for connecting aluminum alloy profiles, thereby improving the torsional and push-out resistance of the connection with the aluminum alloy profiles.
[0005] The objective of this utility model can be achieved through the following technical solutions:
[0006] A riveting stud for connecting aluminum alloy profiles includes a stud body, the outer wall of which is provided with axially distributed limiting teeth, at least one end of which is provided with a mouth for embedding into the profile, a circumferential groove is provided on the surface of the stud body near the mouth, a rivet block is sleeved in the groove, and an inner hole is provided through the middle of the stud body.
[0007] In some embodiments of this utility model, the inner wall of the receiving groove is fitted with a silicone strip and a metal mesh embedded in the silicone strip, the metal mesh having an annular corrugated structure.
[0008] In some embodiments of this utility model, 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 this utility model, the riveting block is a polygonal petal-shaped structure with serrated edges, and after riveting, it forms an interlocking structure with the mounting holes of the aluminum alloy profile.
[0010] In some embodiments of this utility model, the limiting tooth is a shark tooth structure that extends horizontally or obliquely in the radial direction.
[0011] In some embodiments of this utility model, when the limiting tooth is in an inclined extension state, its inclination angle is 15°-30° and the tooth height is 0.3-0.8mm.
[0012] In some embodiments of this utility model, a tapered guide platform is installed at the end of the nozzle along the axial direction of the stud body, and the tapered surface of the tapered guide platform is formed with anti-slip texture.
[0013] In some embodiments of this utility model, the cone angle of the conical guide platform is 120°-140°, the anti-slip texture is a spirally distributed convex ridge along the conical surface, the height of the convex ridge is 0.1-0.3mm, and the spacing between adjacent convex ridges is 0.5-1.5mm.
[0014] In some embodiments of this utility model, 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 0.5-1mm larger than the diameter of the stud body, and the crest height of the metal mesh is 1 / 3 of the thickness of the silicone strip.
[0015] In some embodiments of this utility model, the stud body, the nozzle, and the rivet block are all integrally formed from aluminum alloy material, the hardness of which is HB60-90 and the tensile strength is ≥200MPa.
[0016] The beneficial effects of this utility model are:
[0017] Compared to traditional methods, this technical solution uses a polygonal petal-shaped pressing block in conjunction with a groove, which increases the contact area compared to the traditional annular flange, resulting in better fixing and less loosening. Through the synergistic effect of the limiting teeth and the petal-shaped pressing block, the resistance to pushing force and anti-rotation capability are also effectively improved, meeting the high-strength connection requirements of aviation aluminum profile brackets. Attached Figure Description
[0018] The present invention will be further described below with reference to the accompanying drawings.
[0019] Figure 1 This is a schematic diagram illustrating the riveting process between the present invention and the profile.
[0020] Figure 2 This is a perspective view of Embodiment 1 of this utility model;
[0021] Figure 3 This is a perspective view of Embodiment 2 of this utility model;
[0022] Figure 4 This is a side view of Embodiment 2 of this utility model;
[0023] Figure 5 This is a perspective view of the pressure rivet block in this utility model;
[0024] Figure 6 This is an internal cross-sectional view of the silicone strip in this utility model.
[0025] In the diagram: 1. Stud body; 11. Limiting tooth; 12. Nozzle; 13. Inner hole; 14. Pressing block; 15. Receiving groove; 16. Conical guide platform; 17. Anti-slip texture; 2. Profile; 3. Upper tooling; 4. Lower tooling; 5. Silicone strip; 51. Metal mesh. Detailed Implementation
[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0027] Example 1:
[0028] like Figure 1 , Figure 2 As shown, a riveting 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] The stud body 1 has at least one end with a nozzle 12 for embedding into the profile 2. The nozzle 12, as the guide part of the stud, can be easily aligned and inserted into the pre-made mounting hole of the aluminum alloy profile 2. Its size is usually slightly smaller than the mounting hole for easy initial positioning. At the same time, the structure of the nozzle 12 also provides space and guidance for the plastic flow of the profile 2 material during the subsequent riveting process.
[0030] A groove 15 is circumferentially formed on the surface of the stud body 1 near the nozzle 12. A rivet block 14 is fitted inside the groove 15. The groove 15 provides a space where, during the rivet process, the aluminum alloy material around the mounting hole deforms under pressure and flows into the groove 15. The rivet block 14 plays a crucial role in this process. It is either compressed or its specific shape unfolds / deforms under pressure, further squeezing and locking the profile material flowing into the groove 15, forming a strong mechanical locking structure that significantly improves pull-out resistance.
[0031] The stud body 1 has a through-hole 13 in its center, which provides the core function of the stud—connection. It can be used to pass through bolts or screws, or it can act as a threaded hole to mate with other threaded parts, achieving a fastening connection between the aluminum alloy profile 2 and other components. For example... 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 can be connected and locked to the upper tooling 3 and the lower tooling 4 respectively by screws, thereby expanding the functionality.
[0032] As an example, the inner hole 13 can be either a threaded hole or a smooth hole. A threaded hole has a standard thread on its inner wall, and threaded connections are one of the most common fastening methods. When the inner hole 13 is a threaded hole, screws or bolts can be directly screwed in, simplifying assembly. The standard thread ensures the versatility and interchangeability of the connection. When the inner hole 13 is a smooth hole, it can be used with bolts and nuts, or for positioning or connection through pins.
[0033] As an example, the limiting tooth 11 is a shark tooth structure extending horizontally in the radial direction. The design of the limiting tooth 11 allows it to embed into the material of the hole wall of the aluminum alloy profile 2 during the riveting process, forming a mechanical interlock. This greatly increases the axial pull-out resistance and torsional torque resistance 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, such as Figure 5 As shown, the rivet block 14 has a polygonal petal-shaped structure with serrated edges. After riveting, it forms an interlocking structure with the mounting holes of the aluminum alloy profile 2. The polygonal petal-shaped structure makes it easier for the "petals" of the rivet block 14 to deflect outward or in a specific direction, unfold, or deform under axial pressure. During deformation, the serrated edges can more deeply and firmly "bite" the aluminum alloy profile material flowing into the groove 15 and deforming, forming a complex mechanical interlock, further enhancing the reliability of the connection, especially the torsional resistance.
[0035] In this embodiment, the nozzle 12 of the riveting stud is first aligned with the pre-drilled mounting hole on the aluminum alloy profile 2. Then, axial pressure is applied (using a riveting device), and the nozzle 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 initial anti-torsional locking. Simultaneously, the aluminum alloy material at the edge and below the mounting hole undergoes plastic deformation under pressure and begins to flow into the receiving groove 15. The flowing material compresses the polygonal petal-shaped riveting block 14. The petal structure of the riveting block 14 deforms / unfolds outward or in a specific direction under pressure, and its serrated edges further engage and embed into the flowing aluminum alloy material. The profile material fills the receiving groove 15 and is firmly locked by the deformed riveting block 14, forming a strong mechanical interlocking structure that provides primary pull-out resistance and auxiliary torsional resistance. After the pressure is removed, the stud is firmly fixed to the aluminum alloy profile through the insertion fit of the limiting teeth 11 and the fitting structure formed in the groove 15. The inner hole 13 can be used for subsequent threaded connections with other components.
[0036] Example 2:
[0037] Based on Example 1, this embodiment, while ensuring high locking force, increases the sealing performance (waterproof and dustproof) and a certain vibration buffering capacity at the connection.
[0038] like Figure 6 As shown, in some embodiments of this utility model, the inner wall of the groove 15 is fitted with a silicone strip 5 and a metal mesh 51 embedded in the silicone strip 5. The metal mesh 51 has an annular corrugated structure. In certain applications, such as outdoor equipment, humid environments, or situations requiring airtight / watertight connections, gaps may exist at the connection between the stud body 1 and the profile 2, leading to the intrusion of moisture, dust, or other media, causing corrosion or affecting equipment performance. Simultaneously, the connection may be subject to vibration, requiring buffering and energy absorption. Therefore, the silicone strip 5 is provided, possessing good elasticity and sealing properties. During the riveting process, the silicone strip 5 is compressed, filling the potential tiny gaps 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 the friction at the interface and may help absorb vibration energy. The corrugated structure provides better adaptability and resilience during 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 crest 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 being greater than the depth of the groove 15 ensures sufficient material is compressed during the riveting process, generating an effective axial sealing force. The outer diameter of the silicone strip 5 being slightly larger than the diameter of the stud body 1 helps it maintain its position before riveting and generates radial sealing pre-pressure against the hole wall of the profile 2 during riveting. The crest height of the metal mesh 51 being approximately 1 / 3 of the thickness of the silicone strip 5 is designed to provide sufficient structural support to prevent the silicone from being over-compressed and failing, while maintaining the overall structural flexibility.
[0040] In some embodiments of this utility model, the limiting tooth 11 is a shark tooth structure that extends radially at an angle. The angled shark tooth (usually tilted away from the mouth 12) not only provides anti-torsional 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 its 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° strikes a balance between ensuring effective pull-out resistance, avoiding excessive indentation force, and reducing excessive damage to the substrate of profile 2. The tooth height of 0.3-0.8mm ensures that the tooth can effectively embed into the aluminum alloy profile 2, forming a sufficient mechanical locking depth to accommodate profiles 2 of different thicknesses and strengths.
[0042] In this second embodiment, the key difference from the first embodiment is that the material of the profile 2 deforms and flows into the receiving groove 15. The flowing 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 receiving groove 15 and the deformed profile 2. The metal mesh 51 provides support for the silicone strip, restricting its excessive flow and ensuring that it can maintain a certain structural integrity and resilience under compression. Further pressure and / or material flow action act on the rivet block 14, deforming it and locking the flowing profile 2 material to form a mechanically fitted structure. Here, the rivet block 14 works in conjunction 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 joint, while the elastic silicone also provides a certain vibration damping effect.
[0043] Example 3:
[0044] This embodiment optimizes the installation process based on Embodiment 1, improving alignment accuracy and installation efficiency.
[0045] like Figure 3 , Figure 4 As shown, in some embodiments of this invention, a tapered guide plate 16 is mounted on the end of the nozzle 12 along the axial direction of the stud body 1, and the tapered surface of the tapered guide plate 16 is formed with anti-slip texture 17. In automated assembly or applications requiring high-precision alignment, the standard nozzle 12 may still have problems such as insufficient alignment, initial slippage or rotation during insertion, affecting installation efficiency and quality. The tapered guide plate 16 provides a more progressive and stable guiding slope than the nozzle 12, enabling more precise and easier insertion of the stud into the mounting hole of the profile 2, especially when the hole diameter and the stud body 1 diameter are closely matched. The anti-slip texture 17 on the tapered surface provides additional friction during the initial insertion, preventing the stud body 1 from rotating unexpectedly when contacting the profile, ensuring that the limiting teeth 11 can be inserted in the expected direction.
[0046] As an example, the tapered guide plate 16 has a cone angle of 120°-140°, and the anti-slip texture 17 consists of spirally distributed raised ridges along the tapered surface, with a height of 0.1-0.3 mm and a spacing of 0.5-1.5 mm between adjacent ridges. The large cone angle of 120°-140° provides a stable and effective self-centering guide function. The spirally distributed raised ridges of the anti-slip texture 17 provide continuous and progressive anti-slip action during insertion, while the spiral shape may also help guide minor rotational adjustments. The height and spacing parameters of the raised ridges ensure sufficient friction to contact the edge of the profile 2 opening without excessively increasing insertion resistance, thus preventing slippage.
[0047] In some embodiments of this utility model, the stud body 1, the nozzle 12, and the riveting block 14 are all integrally formed from aluminum alloy. The hardness of the aluminum alloy is HB60-90, and the tensile strength is ≥200MPa. Using aluminum alloy to manufacture the stud body 1, which is the same as or similar to the base material of the aluminum alloy profile 2, 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 riveting structure, while also having a sufficient hardness difference relative to the profile 2 to achieve effective embedding and locking, but without being too hard to cause cracking of the profile during riveting. The tensile strength of ≥200MPa ensures that the stud body 1 can withstand the expected tensile load.
[0048] In this second embodiment, the conical guide platform 16 of the stud body 1 is first aligned with the mounting hole of the aluminum alloy profile 2. The large cone angle allows the stud body 1 to automatically slide in and center itself at the hole opening even if there is a slight initial misalignment. When initial pressure is applied and the conical guide platform 16 contacts the hole opening of the profile 2, the anti-slip texture 17 on its surface generates friction with the profile 2, effectively preventing unnecessary rotation of the stud body 1 before entering the hole and ensuring that the subsequent limiting teeth 11 are inserted in the designed direction. As the pressure increases, the conical guide platform 16 completes its guidance, the nozzle 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 in the first embodiment: the material of the profile 2 flows into the receiving groove 15, and the rivet block 14 deforms to lock the material, forming an interlocking structure. After the pressure is removed, the stud body 1 is firmly fixed. Due to the effect of the conical guide platform 16 and the anti-slip texture 17, the entire installation process is smoother, more precise, and more reliable.
[0049] The key difference between this embodiment and the first embodiment is that the mouth part 12 has an added conical guide platform 16 with anti-slip texture 17, which optimizes the installation guidance and initial positioning anti-rotation performance.
[0050] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples.
[0051] The above description is merely an example and illustration of the present utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present utility model.
Claims
1. A riveting 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. At least one end of the stud body is provided with a mouth for embedding into the profile. A receiving groove is circumferentially opened on the surface of the stud body near the mouth. A rivet block is sleeved in the receiving groove. An inner hole is opened through the middle of the stud body.
2. The riveting stud for connecting aluminum alloy profiles according to claim 1, characterized in that, The inner wall of the container is fitted with a silicone strip and a metal mesh embedded in the silicone strip. The metal mesh has an annular corrugated structure.
3. The riveting 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. A riveting stud for connecting aluminum alloy profiles according to claim 1, characterized in that, The riveting block has a polygonal petal-shaped structure with serrated edges. After riveting, it forms an interlocking structure with the mounting holes of the aluminum alloy profile.
5. A riveting stud for connecting aluminum alloy profiles according to claim 1, characterized in that, The limiting teeth are shark tooth structures that extend horizontally or obliquely in the radial direction.
6. A riveting stud for connecting aluminum alloy profiles according to claim 5, characterized in that, When the limiting tooth is in an inclined extension state, its inclination angle is 15°-30°.
7. A riveting stud for connecting aluminum alloy profiles according to claim 1, characterized in that, A tapered guide plate is installed at the end of the nozzle along the axial direction of the stud body, and the tapered surface of the tapered guide plate is formed with anti-slip texture.
8. A riveting stud for connecting aluminum alloy profiles according to claim 7, characterized in that, The cone angle of the conical guide platform is 120°-140°, and the anti-slip texture is a spiral distribution of raised ridges along the cone surface. The height of the raised ridges is 0.1-0.3mm, and the spacing between adjacent raised ridges is 0.5-1.5mm.
9. A riveting 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 0.5-1mm 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. A riveting stud for connecting aluminum alloy profiles according to claim 1, characterized in that, The stud body, the nozzle, and the rivet block are all integrally formed from aluminum alloy.