Rotation-stopping sealing structure for riveting piece, riveting piece and welding system

Abstract

The utility model relates to the field of fixing parts, and provides a rotation stopping sealing structure for a riveting piece, the riveting piece and a welding system. The anti-rotation sealing structure for the riveting piece comprises a first welding seam, a second welding seam, a third welding seam, a fourth welding seam and a fourth welding seam, wherein the first welding seam is located on the surface, close to the head of a rivet nut, of a connecting piece; the second welding seam is located at the rod position where the rivet nut penetrates through the connecting piece and connected with the fixing part and the connecting piece; the third welding seam is located on the surface, close to the tail expansion section of the rivet nut, of the connecting piece and connected with the connecting piece and the rivet nut. According to the rotation stopping and sealing structure for the riveting piece, the riveting piece and the welding system, the rotation stopping and sealing functions of the riveting piece are achieved at the same time; the method has the advantages that the structure is simple, prefabricated holes are not needed, the overall structure is not obviously changed, the welding mode is adopted, the machining requirement is low, and the method can be used for repairing loosened fasteners or structure leakage; and after long-term use, the rotation stopping effect and the sealing effect cannot be weakened.

Description

Technical Field

[0001] The utility model relates to the field of fixed parts, and provides an anti-rotation sealing structure for riveting parts, a riveting part and a welding system. Background Art

[0002] A blind rivet nut is a fixing element used to connect parts. Compared with conventional bolting, it has advantages such as lighter weight, lower assembly cost, thinner structure, prevention of self-loosening, and better appearance. It is commonly used in the assembly of metal structures, such as airplanes, automobiles, trains, ships, and building structures, and can provide a strong and reliable connection method, suitable for structures that require high strength and seismic applications. Since blind rivet nuts are usually used in occasions where frequent disassembly and installation are required, the anti-rotation property needs to be considered. At the same time, due to the gap between the nut and the connecting part, the impact on the sealing performance of the overall structure needs to be considered.

[0003] The anti-rotation property of a blind rivet nut usually refers to the connection between the blind rivet nut and the fixed object after riveting, which can prevent self-loosening or rotation. This is very important for ensuring the stability and firmness of the connection. The following are some common anti-rotation methods:

[0004] (1) Spline, square or hexagonal design: On some blind rivet nuts, splines may be designed on the nut head or the nut head may be designed as square or hexagonal, combined with the connected object to prevent the blind rivet nut from rotating by itself. This design usually provides good anti-rotation effect, but has high processing requirements for the connected object, is not suitable for the operation mode of on-site drilling, and there are also sealing problems.

[0005] (2) Gasket design: Appropriate design and selection of gaskets can also help improve the anti-rotation property. The design of the gasket can prevent the nut from rotating during connection. This method cannot completely prevent the rotation of the blind rivet nut and is not suitable for fixing thin and light structures. In addition, there are also sealing problems through gasket connection.

[0006] (3) Thread locking agent: In some cases, a thread locking agent can be used. This is a special coating or colloid that can provide additional resistance at the thread connection to prevent the nut from self-loosening. This method achieves anti-rotation in the short term, but as the coating or colloid ages and fails, the anti-rotation ability decreases, and it also causes a decrease in sealing performance.

[0007] In summary, for the anti-rotation methods of blind rivet nuts in the prior art, there are problems of high processing requirements, reduction of anti-rotation performance during long-term use, and poor sealing performance. Content of the Utility Model

[0008] An embodiment of the utility model provides an anti-rotation sealing structure for a riveting part, a riveting part and a welding system, which are used to solve the defects of relatively high processing requirements, reduced anti-rotation performance during long-term use, and poor sealing performance existing in the blind rivet nut in the related art.

[0009] The utility model provides an anti-rotation sealing structure for a riveting part. The riveting part includes a rivet nut, and the rivet nut has a fixing part for fixing a connecting part.

[0010] The anti-rotation sealing structure for the riveting part includes:

[0011] A first weld seam, located on the surface of the connecting part close to the head side of the rivet nut, and connected to the connecting part and the rivet nut respectively;

[0012] A second weld seam, located at the position of the rod part where the rivet nut passes through the connecting part, and connected to the fixing part and the connecting part respectively;

[0013] A third weld seam, located on the surface of the connecting part close to the expansion section of the tail of the rivet nut, and connected to the connecting part and the rivet nut respectively.

[0014] According to the anti-rotation sealing structure for the riveting part provided by the utility model, a communication groove is provided in the expansion section of the tail of the rivet nut, and the communication groove is located on the contact surface between the rivet nut and the connecting part, and the communication groove is communicated with the fixing part.

[0015] According to the anti-rotation sealing structure for the riveting part provided by the utility model, a plurality of communication grooves are arranged circumferentially along the expansion section of the tail of the rivet nut.

[0016] According to the anti-rotation sealing structure for the riveting part provided by the utility model, the depth value range of the communication groove is 0.05 - 0.1 mm, the interval distance between two adjacent communication grooves is 2 - 5 mm, and the width value range of each communication groove is 2 - 5 mm.

[0017] According to the anti-rotation sealing structure for the riveting part provided by the utility model, the first weld seam is a connection structure formed by laser welding.

[0018] According to the anti-rotation sealing structure for the riveting part provided by the utility model, the second weld seam and the third weld seam are connection structures formed by a ring-shaped solder provided on the connecting part. The ring-shaped solder forms the second weld seam from the contact surface side between the expansion section of the tail of the rivet nut and the connecting part and forms the third weld seam between the fixing part and the connecting part.

[0019] According to the anti-rotation sealing structure for the riveting part provided by the utility model, the ring-shaped solder is a ring-shaped filler metal.

[0020] According to the anti-rotation and sealing structure for riveted parts provided by the present utility model, a through hole for the rod part of the rivet nut to pass through is provided on the connecting part, and the diameter of the through hole is greater than a set value of the diameter of the rod part of the rivet nut;

[0021] The diameter of the through hole is smaller than the diameter of the head of the rivet nut, and the diameter of the through hole is smaller than the diameter of the expansion section at the tail of the rivet nut.

[0022] The present utility model also provides a riveted part, including: the anti-rotation and sealing structure for riveted parts of the present utility model.

[0023] The present utility model also provides a welding system for the anti-rotation and sealing structure of riveted parts, which is used for the anti-rotation and sealing structure of riveted parts of the present utility model. The welding system for the anti-rotation and sealing structure of riveted parts includes:

[0024] An image acquisition device for acquiring image information of the rivet nut and the connecting part;

[0025] A laser welding device for welding to form the first weld seam between the connecting part and the head of the rivet nut, and welding to form the second weld seam and the third weld seam by using the residual heat generated by the laser welding device.

[0026] An anti-rotation and sealing structure for riveted parts provided by the present utility model, the riveted part includes a rivet nut, and the rivet nut has a fixing part for fixing the connecting part; the anti-rotation and sealing structure for riveted parts includes: a first weld seam, located on the surface of the connecting part close to the head of the rivet nut, and connected to the connecting part and the rivet nut respectively; a second weld seam, located at the position of the rod part where the rivet nut passes through the connecting part, and connected to the fixing part and the connecting part respectively; a third weld seam, located on the surface of the connecting part close to the expansion section at the tail of the rivet nut, and connected to the connecting part and the rivet nut respectively. The anti-rotation and sealing structure for riveted parts provided by the present utility model adopts three weld seams, namely the first weld seam, the second weld seam and the third weld seam, and simultaneously realizes the anti-rotation and sealing functions of the riveted part. On the one hand, it has a simple structure, does not require prefabricated holes, the overall structure has no significant change, adopts a welding method, has low processing requirements, and can be used for the repair of loose fasteners or structural leakage problems; on the other hand, it has the advantage of permanent fixation, and the anti-rotation effect and sealing effect will not be weakened after long-term use.

[0027] Furthermore, a riveted part provided by the present utility model includes the anti-rotation and sealing structure for riveted parts of the present utility model, and therefore has the same advantages as above.

[0028] Even further, a welding system provided by the present utility model is used for the anti-rotation and sealing structure of riveted parts of the present utility model, and therefore has the same advantages as above. Brief Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of the anti-rotation and sealing structure provided in one embodiment of the present invention.

[0031] Figure 2 It is a schematic structural diagram of the anti-rotation and sealing structure provided in one embodiment of the present invention before welding.

[0032] Figure 3 It is a partial schematic diagram of the communication groove on the rivet nut provided in one embodiment of the present invention.

[0033] Reference Numerals:

[0034] 1. Communication groove; 2. Rivet nut; 3. Connector; 4. First weld seam; 5. Second weld seam; 6. Third weld seam; 7. Ring solder; 8. Laser welding equipment; 9. Image acquisition device. Detailed Description of the Embodiments

[0035] The following will further describe in detail the embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0036] In the description of the present embodiment, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present embodiment.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this embodiment, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In this embodiment, unless otherwise clearly specified and limited, terms such as "arranged", "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0039] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0040] As Figures 1 to 2 shown, the present application discloses an anti-rotation sealing structure for a riveting part. The riveting part includes a rivet nut 2, and the rivet nut 2 has a fixing portion for fixing a connecting member 3. Specifically, the rivet nut 2 includes a rod portion and a head portion, and the cross-sectional dimension of the head portion is larger than that of the rod portion. When the rod portion of the rivet nut 2 is expanded, a tail expansion section is formed at its tail, and the above-mentioned fixing portion for fixing the connecting member 3 is constituted by the tail expansion section and the head portion. The fixing portion is generally a groove structure for embedding the connecting member 3.

[0041] The anti-rotation sealing structure for a riveting part of the present utility model includes: a first weld 4, a second weld 5 and a third weld 6.

[0042] Among them, the first weld seam 4 is located on the surface of the connecting piece 3 close to the head side of the rivet nut 2 and is respectively connected to the connecting piece 3 and the rivet nut 2; the second weld seam 5 is located at the position of the rod part where the rivet nut 2 passes through the connecting piece 3 and is respectively connected to the fixing part and the connecting piece 3; the third weld seam 6 is located on the surface of the connecting piece 3 close to the expansion section on the tail side of the rivet nut 2 and is respectively connected to the connecting piece 3 and the rivet nut 2.

[0043] Specifically, the first weld seam 4, the second weld seam 5 and the third weld seam 6 all adopt a welding connection method, and the above weld seams can adopt welding methods such as laser welding and brazing.

[0044] The first weld seam 4 welds the connecting piece 3 and the head of the rivet nut 2 to form a weld connection, which increases the fixing strength between the rivet nut 2 and the connecting piece 3, solves the problems of loosening and self-rotation of the rivet nut 2 that are likely to occur during repeated tightening and loosening operations in the operation and maintenance and overhaul processes of the bolted products of the rivet nut 2, avoids the failure of the structure caused by the inability to disassemble and assemble the bolt, and can also be used for the re-fixing and repair of the failed structure.

[0045] The second weld seam 5 is filled between the connecting piece 3 and the rod part of the rivet nut 2, and the third weld seam 6 welds the connecting piece 3 and the rivet nut 2 to form a weld connection. The second weld seam 5 and the third weld seam 6 mainly play a sealing role, effectively blocking the passage of gas and liquid through the gap between the rivet nut 2 and the connecting piece 3, and realizing the overall sealing of the structure.

[0046] It can be seen that the present application adopts three weld seams, namely the first weld seam 4, the second weld seam 5 and the third weld seam 6, and simultaneously realizes the anti-rotation and sealing functions of the riveted parts. On the one hand, it has a simple structure, does not require pre-drilled holes, the overall structure has no significant change, adopts a welding method, has low processing requirements, and can be used for the repair of loose fasteners or structural leakage problems; on the other hand, it has the advantage of permanent fixation, and will not cause the weakening of the anti-rotation effect and the sealing effect after long-term use.

[0047] In one embodiment of the present utility model, as Figure 3 shown, the tail expansion section of the rivet nut 2 is provided with a communication groove 1, and the communication groove 1 is located on the contact surface between the rivet nut 2 and the connecting piece 3, and the communication groove 1 is communicated with the fixing part. In this embodiment, the communication groove 1 communicates the outside of the rivet nut with the gap between the rivet nut 2 (rod part) and the connecting piece 3. During the welding process, the molten solder can enter the gap between the rivet nut 2 and the connecting piece 3 from the tail expansion section through the communication groove, and the second weld seam is formed after the solder cools.

[0048] In one embodiment of the present utility model, a plurality of communication grooves 1 are arranged circumferentially along the tail expansion section of the rivet nut 2 so that the solder can quickly and evenly enter the gap between the rivet nut 2 and the connecting piece 3 through the plurality of communication grooves.

[0049] In one embodiment of the present utility model, the depth of the communication groove 1 ranges from 0.05 to 0.1 mm, the spacing distance between adjacent two communication grooves 1 ranges from 2 to 5 mm, and the width of each communication groove 1 ranges from 2 to 5 mm. The communication grooves with the above dimensions can ensure the rapid entry of solder and do not affect the process performance of the rivet nut.

[0050] It can be understood that the above-mentioned communication groove 1 can be formed by deforming the tail expansion section through a special riveting gun or other processing equipment after the tail expansion section is formed. When the solder cools and solidifies, it can supplement and seal the communication groove 1, and ensure the structural integrity of the rivet nut 2 through the weld.

[0051] In one embodiment of the present utility model, the first weld 4 is a connection structure formed by laser welding.

[0052] In one embodiment of the present utility model, the second weld 5 and the third weld 6 are connection structures formed by the annular solder 7 provided on the connecting member 3. The annular solder 7 forms the second weld 5 on one side of the contact surface between the tail expansion section of the rivet nut 2 and the connecting member 3 and forms the third weld 6 between the fixing portion and the connecting member 3. Specifically, both the second weld 5 and the third weld 6 adopt the method of solder welding. By heating to a high temperature, the solder reaches the molten state and flows into the gap between the rivet nut 2 and the connecting member 3. After the solder cools, the second weld 5 and the third weld 6 are formed. Therefore, the above-mentioned second weld 5 is filled between the connecting member 3 and the rivet nut 2, and the third weld 6 is connected between the connecting member 3 and the rivet nut 2, having a sealing effect.

[0053] In one embodiment of the present utility model, the annular solder 7 is an annular filler metal. The annular solder 7 is sleeved outside the rivet nut 2. By heating the annular solder 7 to a high temperature, the annular solder 7 forms a molten state and flows into the gap between the rivet nut 2 and the connecting member 3 from between the rivet nut 2 and the connecting member 3, thereby forming the second weld 5 and the third weld 6, and the welding process is simple.

[0054] In one embodiment of the present utility model, both the second weld 5 and the third weld 6 are brazed welds. Specifically, the solder is a filler metal, and the filler metal forms a brazed weld through the brazing method. In this embodiment, both the second weld 5 and the third weld 6 adopt the brazing method. Preferably, the filler metal can adopt a tin-based filler metal, which has a lower melting point and avoids damage to the anti-corrosion layer such as dacromet on the rivet fastener during the welding process.

[0055] In one embodiment of the present utility model, the first weld seam 4 is a laser weld seam. When specifically implementing this embodiment: A laser welding device 8 is used between the head of the rivet nut 2 and one side of the connecting piece 3, and a laser weld seam is formed by means of laser welding; and during the laser welding process, the heat generated heats the solder, and the solder is heated to a molten state to form the second weld seam 5 and the third weld seam 6. Specifically, the working temperature of laser welding is relatively high, causing the connection position between the rivet nut 2 and the connecting piece 3 to quickly melt and then quickly cool and solidify, thereby realizing the connection between the two; and during the laser welding process, its heat heats the annular filler metal to a molten state and then fills the gap between the rivet nut 2 and the connecting piece 3 to achieve the sealing of the structure. This step requires special attention to maintaining an appropriate heating temperature to ensure that the filler metal can be effectively filled and form a good metallurgical bond with the base metal.

[0056] In the above embodiment, the rivet fastener adopts a laser welding anti-rotation method and a brazing sealing method, which have lower heat input and a narrower heating area compared with other welding methods, can be used for thin plate structures and will not damage the anti-corrosion layer of the nut; moreover, two kinds of welding (i.e., laser welding and brazing) are achieved by one-time laser heating, effectively reducing the heat loss of the material.

[0057] In one embodiment of the present utility model, a through hole for the rod portion of the rivet nut 2 to pass through is provided on the connecting piece 3, and the diameter of the through hole is greater than a set value of the diameter of the rod portion of the rivet nut 2; the diameter of the through hole is smaller than the diameter of the head of the rivet nut 2, and the diameter of the through hole is smaller than the diameter of the expansion section at the tail of the rivet nut 2.

[0058] When specifically implementing the present utility model, its implementation process is as follows:

[0059] S1. Pre-fabricate an annular filler metal outside the rivet nut 2.

[0060] S2. For the installation of the rivet nut 2, it is necessary to pre-drill or field-drill a hole with a diameter 0.1 mm larger than the diameter of the rivet nut 2, and perform meticulous processing and strict cleaning on the workpiece to remove oil stains and oxide films.

[0061] S3. Then screw the rivet nut 2 onto the corresponding installation tool and implant it into the drilled hole from one side, and its length depends on the material thickness. Use a manual blind rivet installation tool or an automatic rivet gun to deform the rivet nut 2, and after the riveting is in place, the rivet gun withdraws.

[0062] S4. Based on the machine vision technology of a binocular CCD camera, locate the position and depth of the rivet nut 2 and send it to the laser welding execution structure, and use laser welding to form the first weld seam 4 between the rivet nut 2 and the connecting piece 3 to realize the anti-rotation fixation of the rivet fastener.

[0063] S5. Heat the annular filler metal to the molten state using the heat generated during the laser welding process, and then fill the gap between the rivet nut 2 and the material to be joined to achieve the sealing of the structure. In this step, special attention should be paid to maintaining an appropriate heating temperature to ensure that the filler metal can be effectively filled and form a good metallurgical bond with the base material. At the same time, a tin-based filler metal with a melting point below 300°C is used to avoid damaging the anti-corrosion coating of the rivet nut 2 such as Dacromet (which is damaged at around 350°C) during the welding process.

[0064] S6. For the loosened rivet nut 2, the method in step S4 can be used for welding and re-fixing the rivet nut 2.

[0065] S7. For the structure with leakage problems, the weld tin-based filler metal can be heated above the melting temperature and removed by means such as defocused laser, and then the sealing brazing is re-implemented.

[0066] The present utility model also provides a riveted part, which includes: the anti-rotation and sealing structure in the above-mentioned embodiments of the present utility model.

[0067] The riveted part provided by the present utility model includes the anti-rotation and sealing structure in the above-mentioned embodiments of the present utility model, and therefore has the same advantages as above.

[0068] Optionally, the rivet nut 2 can be a press rivet nut 2 and blind rivet nuts 2 such as round, square or hexagonal.

[0069] Specifically, the image acquisition device 9 can adopt a CCD camera, and use machine vision technology to locate the installation position and welding position.

[0070] The present utility model also provides a welding system for the anti-rotation and sealing structure of a riveted part, which is used for the anti-rotation and sealing structure of the riveted part in the above-mentioned embodiments of the present invention. The welding system includes: an image acquisition device 9 and a laser welding device.

[0071] Among them, the image acquisition device 9 is used to acquire the image information of the rivet nut 2 and the connecting part 3; the laser welding device is used to weld and form a first weld seam 4 between the connecting part and the head of the rivet nut 2, and form a second weld seam 5 and a third weld seam 6 by using the residual heat generated by the laser welding device.

[0072] Specifically, the image acquisition device 9 can use a CCD camera and machine vision technology to locate the position and depth of the rivet nut 2, determine the welding position, and send it to the laser welding device. The rivet nut 2 and the connecting part 3 are welded to form a first weld seam 4 by using laser welding to achieve the anti-rotation fixation of the riveted fastener.

[0073] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotation-stop sealing structure for a riveted part, characterized in that: The riveted component comprises a rivet nut (2), wherein the rivet nut (2) has a fixing portion for fixing a connecting component (3); The anti-rotation sealing structure for the riveted part comprises: A first weld (4) is located on a surface of the connecting member (3) close to a side of the head of the rivet nut (2), and is respectively connected to the connecting member (3) and the rivet nut (2); A second weld (5) is located at the position of the rod of the rivet nut (2) passing through the connecting member (3), and is respectively connected to the fixing portion and the connecting member (3); The third weld (6) is located on a surface of the connecting piece (3) close to the rear expansion section of the rivet nut (2), and is respectively connected to the connecting piece (3) and the rivet nut (2).

2. The anti-rotation sealing structure for riveted parts according to claim 1, characterized in that: The expansion section at the rear of the rivet nut (2) is provided with a communication groove (1), and the communication groove (1) is located on the contact surface between the rivet nut (2) and the connecting piece, and the communication groove (1) is connected to the fixing portion.

3. The anti-rotation sealing structure for riveted parts according to claim 2, characterized in that: A plurality of the communicating grooves (1) are arranged along the circumference of the rear expansion section of the rivet nut (2).

4. The anti-rotation sealing structure for riveted parts according to claim 2, characterized in that: The depth of the connecting groove (1) ranges from 0.05 to 0.1 mm, the spacing distance between two adjacent connecting grooves (1) ranges from 2 to 5 mm, and the width of each connecting groove (1) ranges from 2 to 5 mm.

5. The anti-rotation sealing structure for riveted parts according to claim 1, characterized in that: The first weld (4) is a connection structure formed by laser welding.

6. The anti-rotation sealing structure for riveted parts according to claim 1, characterized in that: The second weld (5) and the third weld (6) are connection structures formed by an annular solder (7) provided on the connecting member (3), wherein the annular solder (7) forms the second weld (5) from one side of the contact surface between the rear expansion section of the rivet nut (2) and the connecting member (3), and forms the third weld (6) between the fixing portion and the connecting member (3).

7. The anti-rotation sealing structure for riveted parts according to claim 6, characterized in that: The annular solder (7) is an annular solder.

8. The anti-rotation sealing structure for riveted parts according to any one of claims 1 to 6, characterized in that: The connecting piece (3) is provided with a through hole for the rod of the rivet nut (2) to pass through, and the diameter of the through hole is greater than a set value of the diameter of the rod of the rivet nut (2); The diameter of the through hole is smaller than the diameter of the head of the rivet nut (2), and the diameter of the through hole is smaller than the diameter of the expansion section at the tail of the rivet nut (2).

9. A riveted part, characterized in that: include: The anti-rotation sealing structure for riveted parts according to any one of claims 1 to 8.

10. A welding system for a rotation-stop sealing structure of a riveted part, characterized in that: The anti-rotation sealing structure for a riveted part according to any one of claims 1 to 8, wherein the welding system for the anti-rotation sealing structure for a riveted part comprises: An image acquisition device (9) for acquiring image information of the rivet nut (2) and the connecting member (3); A laser welding device is used for welding between the connecting piece and the head of the rivet nut (2) to form the first weld seam (4), and for welding the second weld seam (5) and the third weld seam (6) by residual heat generated by the laser welding device.

Images