Electromagnetic welding sealing blind hole nut

Abstract

The utility model relates to the technical field of blind hole sealing nuts, and provides an electromagnetic welding blind hole sealing nut which comprises a nut sleeve part and a welding flange part, the nut sleeve part is provided with a blind hole, and the welding flange part is arranged at an opening of the blind hole. The face, away from an opening of the blind hole, of the welding flange part is a welding conical face. By means of the technical scheme, the problems that in the prior art, a blind hole nut is sealed through dispensing, the sealing effect is unstable, and aging is prone to occurring are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealed blind hole nuts, and specifically, to an electromagnetic welding sealed blind hole nut. Background Art

[0002] A nut, also known as a screw nut, is a fixing tool with a hole in the center and internal threads on the inner side of the hole. Nuts are often used in combination with screws of appropriate sizes to fix relevant joints. Nuts are mostly hexagonal, followed by square. There are many types of nuts. A blind hole nut is a nut installed on a workpiece to provide an installation position for a bolt.

[0003] In the prior art, in some application scenarios, it is necessary to seal the connection between the blind hole nut and the workpiece. In the prior art, glue is applied on the side of the blind hole nut close to the workpiece for sealing, and then riveting is used to connect with the workpiece, and the sealing is achieved by squeezing the rubber ring. However, due to the unevenness of glue application and the problems of rubber ring aging, instability, and high cost, based on the above problems, a more reliable and stable new type of blind hole nut is urgently needed. Summary of the Utility Model

[0004] The utility model provides an electromagnetic welding sealed blind hole nut, which solves the problems of unstable sealing effect and easy aging of the blind hole nut using glue for sealing in the prior art.

[0005] The technical solution of the utility model is as follows:

[0006] An electromagnetic welding sealed blind hole nut, the sealed blind hole nut includes a nut sleeve portion and a welding flange portion. The nut sleeve portion is provided with a blind hole, the welding flange portion is arranged at the opening of the blind hole, and the side of the welding flange portion away from the blind hole opening is set as a welding conical surface.

[0007] The side of the welding flange portion close to the blind hole opening is set as a welding plane, and the included angle between the welding conical surface and the welding plane is between 2° and 5°.

[0008] A guiding step is arranged at the connection between the welding conical surface and the outer surface of the nut sleeve portion.

[0009] A guiding notch is arranged at the connection between the welding plane and the nut sleeve portion.

[0010] Internal threads are arranged in the blind hole.

[0011] The working principle and beneficial effects of the utility model are as follows:

[0012] In the present utility model, an electromagnetic welding sealed blind hole nut is disclosed, which has a nut sleeve part and a welding flange part. The welding flange part is at one end of the nut sleeve part and is located at the opening of the blind hole on the nut sleeve part. Among them, the surface of the welding flange part away from the blind hole opening is set as a welding conical surface, that is, the thickness of the welding flange part gradually decreases from the center to the outside. Adopting this structure is based on the principle of electromagnetic welding and sealing. During electromagnetic welding and sealing, the annular coil is connected to the circuit. When high-frequency pulsed current passes through the annular coil, a strong magnetic field is generated around the coil. When the coil approaches the welding flange part, under the action of the electromagnetic field, the welding flange part moves away from the coil (towards the workpiece) at a speed close to or supersonic speed, and then the welding flange part collides with the workpiece at a high speed, thus realizing metallurgical bonding. Designing a welding conical surface with an inclination angle can make there be a certain collision gap between the welded parts, thereby increasing the collision speed, improving the welding efficiency, and ensuring the welding tightness. Through the welding and sealing structure, the sealing stability is good and it will not lose the sealing function due to aging after long-term use; at the same time, through the above scheme, it can reduce the large welding error caused by humans, reduce the labor cost, and improve the production efficiency. Brief Description of the Drawings

[0013] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0014] Figure 1 It is a schematic structural diagram of one of the embodiments of the nut in the present utility model;

[0015] Figure 2 It is a schematic structural diagram of another embodiment of the nut in the present utility model;

[0016] Figure 3 It is a structural layout diagram of the welding of the nut and the workpiece in the present utility model;

[0017] In the figure: 1. Nut sleeve part, 2. Welding flange part, 3. Blind hole, 4. Welding conical surface, 5. Welding plane, 6. Guide step, 7. Guide notch, 8. Thread, 9. Coil, 10. Workpiece, 11. Groove. Specific Embodiments

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] Such as Figures 1 to 3As shown in the figure, this embodiment provides an electromagnetic welding sealed blind hole nut. The sealed blind hole nut includes a nut sleeve portion 1 and a welding flange portion 2. A blind hole 3 is provided in the nut sleeve portion 1, and the welding flange portion 2 is arranged at the opening of the blind hole 3. The surface of the welding flange portion 2 away from the opening of the blind hole 3 is set as a welding tapered surface 4.

[0020] In this embodiment, an electromagnetic welding sealed blind hole nut is disclosed. Its structure is a nut sleeve portion 1 and a welding flange portion 2. The welding flange portion 2 is at one end of the nut sleeve portion 1 and is located at the opening of the blind hole 3 on the nut sleeve portion 1. Among them, the surface of the welding flange portion 2 away from the opening of the blind hole 3 is set as a welding tapered surface 4, that is, the thickness of the welding flange portion 2 gradually decreases from the center to the outside. Adopting this structure is combined with the principle of electromagnetic welding and sealing. During electromagnetic welding and sealing, the annular coil 9 is connected to the circuit. When a high-frequency pulsed current passes through the annular coil 9, a strong magnetic field is generated around the coil 9. When the coil 9 approaches the welding flange portion 2, under the action of the electromagnetic field, the welding flange portion 2 moves away from the coil 9 (towards the workpiece 10) at a speed close to or supersonic speed, and then the welding flange portion 2 collides with the workpiece 10 at a high speed, thereby realizing metallurgical bonding. Designing a welding tapered surface 4 with an inclination angle can make there be a certain collision gap between the welded parts, thereby increasing the collision speed, improving the welding efficiency, and ensuring the welding tightness. Through the welding and sealing structure, the sealing stability is good and it will not lose the sealing function due to aging after long-term use.

[0021] Furthermore, on the basis of the above embodiment, in a possible implementation manner, an annular groove 11 can also be provided on the welding tapered surface 4. The depth of the groove 11 can be selected according to needs or can also be a relatively shallow indentation. By providing the annular groove 11, the formation position of the metallurgical bonding weld formed by the high-speed collision can be effectively guided, making its position more regular and controllable. At the same time, it also helps to make the formed weld have better tightness, and the metallurgical bonding occurs on both sides of the indentation towards the indentation, and the tightness is more reliable.

[0022] The surface of the welding flange portion 2 close to the opening of the blind hole 3 is set as a welding plane 5, and the included angle between the welding tapered surface 4 and the welding plane 5 is between 2° and 5°.

[0023] On the basis of the above embodiment, the surface of the welding flange portion 2 close to the opening side of the blind hole 3 is a welding plane 5, and the included angle between the welding tapered surface 4 and the welding plane 5 is α. α can be selected in the range of 2° to 5°, which can not only provide welding space but also achieve the welding and sealing effect.

[0024] A guiding step 6 is provided at the connection between the welding tapered surface 4 and the outer surface of the nut sleeve portion 1.

[0025] On the basis of the above embodiments, a guiding boss is provided at the connection between the welded conical surface 4 and the nut sleeve portion 1. The guiding boss is used for guiding the installation and reducing the extrusion deformation near the installation hole so as to reduce the local stress. The guiding boss can be designed into a regular rhombus or an arc with a gentle transition according to needs.

[0026] A guiding notch 7 is provided at the connection between the welded plane 5 and the nut sleeve portion 1.

[0027] A thread 8 is provided in the blind hole 3.

[0028] On the basis of the above embodiments, a guiding notch 7 is provided at the connection between the welded plane 5 and the inner side surface of the nut sleeve portion 1, and a thread 8 is provided on the inner side of the blind hole 3. When installing the bolt, the guiding notch 7 helps the bolt to align with the installation position, so that the bolt and the thread 8 can be quickly matched.

[0029] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electromagnetically welded sealed blind hole nut, characterized in that: The sealing blind hole nut comprises a nut sleeve portion (1) and a welding flange portion (2), wherein the nut sleeve portion (1) is provided with a blind hole (3), the welding flange portion (2) is arranged at the opening of the blind hole (3), and a side of the welding flange portion (2) away from the opening of the blind hole (3) is arranged as a welding conical surface (4).

2. The electromagnetic welding sealed blind hole nut according to claim 1, characterized in that: A surface of the welding flange portion (2) close to the opening of the blind hole (3) is arranged as a welding plane (5), and an angle between the welding conical surface (4) and the welding plane (5) is between 2° and 5°.

3. The electromagnetic welding sealed blind hole nut according to claim 2, characterized in that: A guide step (6) is provided at the connection between the welding conical surface (4) and the outer surface of the nut sleeve portion (1).

4. The electromagnetic welding sealed blind hole nut according to claim 3, characterized in that: A guide notch (7) is provided at the connection between the welding plane (5) and the nut sleeve portion (1).

5. The electromagnetic welding sealed blind hole nut according to claim 4, characterized in that: A thread (8) is provided in the blind hole (3).

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