High-strength steel projection welding sealing nut

Abstract

The utility model belongs to the technical field of nut projection welding, and discloses a high-strength steel projection welding sealing nut which comprises a nut base body provided with an inner threaded hole. The convex ring is arranged at the bottom of the nut base body; the sealing structure is arranged at the joint of the nut base body and the convex ring; and the sealing structure has a high melting point, and a gap between the convex ring and the nut base body is filled in a high-temperature state. The high-strength steel projection welding sealing nut can achieve good welding sealing performance. And compared with a common nut, the high-strength steel projection welding sealing nut is higher in welding adaptability and can adapt to more diversified welding processes.

Description

TECHNICAL FIELD

[0001] The utility model belongs to nut projection welding technical field, concretely relates to a high -strength steel projection welding sealing nut with good airtight stability. BACKGROUND

[0002] In new energy electric automobile, the sealing of battery box as the core component of vehicle directly influences the safe use of whole automobile system, and the battery box is installed in the low position in electric automobile and is exposed in the relatively open space, and these conditions all put forward higher requirement to the sealing of battery box.

[0003] In order to solve the above problems, a high-strength steel projection welding sealing nut with good welding sealing is needed. CONTENT OF UTILITY MODEL

[0004] To solve the above technical problems, the utility model aims at providing a high-strength steel projection welding sealing nut.

[0005] To achieve the purpose of solving the above problems, the utility model provides a high-strength steel projection welding sealing nut, comprising,

[0006] The nut base body has an internal thread hole;

[0007] The convex ring is arranged at the bottom of the nut base body;

[0008] The gasket is arranged at the connection between the nut base body and the convex ring; the gasket has a high melting point and compensates for the gap between the convex ring and the nut base body under high temperature.

[0009] According to the utility model, further, the annular groove is embedded in the annular groove.

[0010] According to the utility model, further, the convex ring has a certain height and its diameter is greater than the diameter of the annular groove.

[0011] According to the utility model, further, the sealing structure is made of polytetrafluoroethylene.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The high-strength steel projection welding sealing nut can achieve good welding sealing, and compared with the ordinary nut, the welding adaptability is stronger, and more diversified welding processes can be adapted.

[0014] By reasonable adjustment parameter and suitable process selection can make high strength steel projection welding sealing nut reaches higher weld quality, nut projection welding welding quality directly affects its later assembly, debugging and the overall performance of product. The high strength projection welding sealing nut of the utility model is suitable for the new product of higher requirement to sealing property and welding quality, solves the problem of weld quality and the problem of projection welding sealing stability of product in the welding process, improves the qualified rate of welded product. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of a high strength steel projection welding sealing nut of the utility model;

[0016] Figure 2 It is a structure schematic view of a high strength steel projection welding sealing nut welding state of the utility model.

[0017] BRIEF DESCRIPTION OF DRAWINGS:

[0018] 1-nut body, 11-flange, 2-internal thread hole, 3-annular boss, 31-toothed sealing geometry, 4-fluted tooth. DETAILED DESCRIPTION

[0019] In order to make the utility model more obvious and easy to understand, with preferred embodiment, and cooperate with the drawings, detailed description is as follows:

[0020] Please refer to Figure 1 And Figure 2 The application embodiment provides a kind of high strength steel projection welding sealing nut, including the nut base body 1 with internal thread hole 2, annular groove 3 being arranged in the bottom of nut base body 1, washer 4 being embedded in recess 3, convex ring 5 being arranged in the bottom of nut base body 1. Wherein, convex ring 5 has certain height and its diameter is greater than the diameter of annular groove 3. In use, convex ring 5 is contacted with workpiece 7. In order to improve the stability of washer 4, avoid being melted in the welding process, washer 4 uses high melting point polytetrafluoroethylene washer. Washer 4 is compressed and deformed in the welding process, fills the gap of convex ring forming poor place, improves the air tightness stability of sealing projection welding.

[0021] The welding process of the utility model is as follows:

[0022] 1, wire is fed through straightening machine, is processed into nut base body 1 by punch equipment.

[0023] 2, the nut base body 1 processed is processed into internal thread hole 2 by thread processing equipment;

[0024] 3, polytetrafluoroethylene material is processed into washer 4;

[0025] 4, washer is placed in annular groove 3.

[0026] 5. A convex ring 5 is welded and fixed at the bottom of the nut base 1.

[0027] The working principle of the utility model is as follows: in the welding process of the workpiece, the bottom of the convex ring 5 contacts the surface of the workpiece 7, the outer periphery of the nut base 1 is connected with an upper electrode 6, the lower part of the nut base 1 is connected with a lower electrode 9, the lower electrode 9 is located below the workpiece 7, one end of the positioning pin 8 is connected with the internal thread hole 2, and the other end is connected with the lower electrode 9 after penetrating the convex ring 5 and the workpiece 7 in sequence, so that the workpiece and the nut are tightly attached; then the welding current is connected, and the high-strength convex welding sealing nut and the workpiece 7 are welded together. In a high-temperature environment, the gasket 4 blocks the threads of the internal thread hole 2 from being damaged by the melting and splashing of the convex ring 5, and the gasket 4 made of polytetrafluoroethylene material with high melting point is compressed and deformed during the welding process, filling the gap of the convex ring 5, improving the air tightness stability of the sealing convex welding. Compared with the convex ring area, the convex point area is much larger, and the plate material may have surface defects, poor welding machine electrode follow-up performance and uniformity, and various problems such as nut and plate coating, which will cause poor sealing convex welding stability. Under reasonable welding process parameters, due to the fast melting speed of the convex welding and the fast cooling speed of the electrode water cooling, the heat transferred to the polytetrafluoroethylene gasket is less, the polytetrafluoroethylene gasket will not melt and deform, and the stability of the sealing convex welding is further guaranteed.

[0028] The above is only the preferred embodiment of the utility model, and is not any form and substantial limitation of the utility model. It should be pointed out that for ordinary skilled personnel in the technical field, some improvements and supplements can be made without departing from the utility model, and these improvements and supplements should be regarded as the protection range of the utility model. For those skilled in the art, some changes, modifications and equivalent changes of the above disclosed technical content without departing from the spirit and scope of the utility model are equivalent embodiments of the utility model; at the same time, any equivalent change, modification and evolution of the above-mentioned embodiments according to the essential technology of the utility model are still within the scope of the technical scheme of the utility model.

Claims

1. A high-strength steel projection weld seal nut characterized by, The utility model relates to a nut structure, comprising a nut base with an internally threaded hole; a convex ring is arranged at the bottom of the nut base; a gasket is arranged at the joint of the nut base and the convex ring; the gasket has a high melting point and can compensate for the gap between the convex ring and the nut base under high temperature. The bottom of the nut base has an annular groove, and the gasket is embedded in the annular groove. The convex ring has a certain height and a diameter greater than that of the annular groove. The sealing structure is made of polytetrafluoroethylene.

2. A high-strength steel pop rivet seal nut according to claim 1, wherein ​ 3. A high-strength steel pop rivet seal nut as claimed in claim 2, wherein, ​ 4. A high-strength steel projection weld seal nut as defined in claim 1, wherein, ​

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