Welding stud for new energy automobile

Abstract

The utility model discloses a welding stud for a new energy automobile, which comprises a stud body and a stud head, the stud body is positioned below the stud head, the stud body is an external thread column, the welding stud needs to be pre-mounted on a plate of the new energy automobile, pressing teeth are arranged on the peripheral surface of the bottom end of the stud head, and the pressing teeth are arranged on the stud head. The material pressing teeth consist of a plurality of saw teeth which are continuously and adjacently distributed on the peripheral surface; a feeding groove is formed in the position, making contact with the nail body, of the bottom of the nail head. The feeding groove and the pressing teeth are embedded into the plate through a stamping process so as to fix the welding stud on the plate; the plate is welded to the top of the nail head through a welding process. According to the utility model, the tensile strength and positioning stability of the welding stud on the plate can be improved, and the risk of falling of the welding stud is prevented.

Description

Technical Field

[0001] This utility model relates to the field of welding studs for new energy, and in particular to a welding stud for new energy vehicles. Background Technology

[0002] Stud welding is a special welding process that efficiently and cost-effectively welds studs or cylindrical metal pieces with a diameter of 2-25mm to the surface of a metal, achieving full-section fusion. This technology can replace some traditional processing methods, such as drilling, tapping, manual welding, and post-weld treatment. It offers a series of advantages, including full-section fusion of the weld, improved safety of the welded area, a small heat-affected zone, minimal deformation of the base metal, minimal weld damage, little or no weld damage on the back of the base metal, and maintaining the airtightness of hollow parts. Studs generally consist of a stud body, an arc-starting part (stud head), and some may also have threads or various connecting patterns, or a hollow structure; cylindrical-head studs are the most common. Stud welding is widely used in the production of automotive underbody panels and other steel stamped parts for the automotive bottom.

[0003] The welding principle of existing T5 specification welding studs on the market is as follows: At the point to be welded, a stud gun automatically raises the stud to the distance between it and the base material, igniting an electric arc. The heat of the arc melts the stud head and the surface of the base material, forming a molten pool. After the arc extinguishes, the spring pressure of the stud gun forces the molten end of the stud into the molten pool. Once the molten pool solidifies, the welding process is complete. This welding method requires careful consideration of how to precisely position the stud for welding at the designated location. Since the welding work is only completed on the surface of the base material, the stud is merely adhered to the surface and is at risk of detachment upon impact. This is especially true for stud welding on automotive underbody structural components, where the base material is often galvanized steel sheet. The galvanized layer increases the difficulty of stud welding. If the stud falls off during final assembly, it will greatly affect the production cycle, impact the connection strength of related structural components, and cause corresponding parts to loosen, affecting vehicle operation. Therefore, it is necessary to minimize the risk of stud detachment. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a welding stud for new energy vehicles, which can improve the tensile strength and positioning stability of the welding stud on the plate and prevent the risk of the welding stud falling off.

[0005] To address the aforementioned technical problems, this utility model discloses a welding stud for new energy vehicles, comprising a stud body and a stud head, wherein the stud body is located below the stud head, and the stud body is an externally threaded post. The welding stud needs to be pre-installed on the sheet metal of the new energy vehicle.

[0006] The bottom end of the nail head is provided with pressing teeth on its outer peripheral surface, and the pressing teeth are composed of a plurality of serrations that are continuously and adjacently distributed on the outer peripheral surface;

[0007] The bottom of the nail head is provided with a feeding groove at the position where it contacts the nail body; the feeding groove and the pressing teeth are embedded into the plate by a stamping process to fix the welding nail to the plate; the top of the nail head is welded to the plate by a welding process.

[0008] As an optional implementation, the thickness of the outer circumferential surface of the pressure teeth is 0.1~1.5mm.

[0009] As another optional implementation, the width of the feeding trough is 0.1~1mm.

[0010] As another optional implementation, the thickness of the nail head is 1~2mm.

[0011] As another optional implementation, the pressure teeth are formed by sequentially opening multiple grooves along the circumferential direction on the outer peripheral surface of the bottom end of the nail head, with each groove located between two adjacent saw teeth.

[0012] As another alternative implementation, the sharp corners of the serrations face away from the axis of the weld stud.

[0013] As another alternative implementation, the sharp angle of the serrations is 30 to 150 degrees.

[0014] As another optional implementation, the material of the weld stud is hardened carbon steel.

[0015] As another optional implementation, the top of the nail body is also provided with a straight section with a height of 0.7-0.9mm, and the bottom of the straight section is connected to the external thread portion of the nail body.

[0016] As another optional implementation, the surface of the weld stud is provided with an anti-rust coating.

[0017] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0018] This utility model embodiment utilizes a pressing tooth structure: continuous saw teeth form a cutting edge, producing a progressive interlocking effect during stamping, causing the sheet material to plastically flow and fill the feeding groove, forming a mechanical interlocking structure; a dual fixing mechanism: stamping riveting and top welding form a composite fixing, the metallurgical bond produced by welding and the mechanical interlocking work together to improve tensile strength (compared to single welding); a pre-positioning function: the stamping embedding process ensures the perpendicularity of the weld stud, avoiding the skewing problem caused by subsequent welding thermal deformation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a welding stud for new energy vehicles disclosed in an embodiment of this utility model;

[0021] Figure 2 This is a bottom view of a cross-section of a welding stud used in new energy vehicles, as disclosed in an embodiment of this utility model. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] See Figures 1-2 This utility model discloses a welding stud for new energy vehicles, comprising a stud body 1 and a stud head 2, wherein the stud body 1 is located below the stud head 2, and the stud body 1 is an externally threaded post. The plate material 3 of the new energy vehicle needs to be pre-installed with the welding stud.

[0024] The bottom outer circumferential surface of the nail head 2 is provided with pressing teeth 21, which are composed of a plurality of adjacent serrations 211 continuously distributed on the outer circumferential surface; the bottom of the nail head 2 is provided with a feeding groove 22 at the position where it contacts the nail body 1; the feeding groove 22 and the pressing teeth 21 are embedded into the plate 3 by a stamping process to fix the welding nail to the plate 3; the top 23 of the nail head 2 is welded to the plate 3 by a welding process.

[0025] This utility model embodiment utilizes a pressing tooth 21 structure: continuous saw teeth 211 form a cutting edge, producing a progressive interlocking effect during stamping, causing the sheet material 3 to plastically flow and fill the feeding groove 22, forming a mechanical interlocking structure; a dual fixing mechanism: stamping riveting and top welding form a composite fixing, the metallurgical bond produced by welding and the mechanical interlocking work together to improve tensile strength (compared to single welding); a pre-positioning function: the stamping embedding process ensures the perpendicularity of the weld stud, avoiding the skewing problem caused by subsequent welding thermal deformation.

[0026] In another optional embodiment, the thickness of the outer peripheral surface of the pressure tooth 21 is 0.1~1.5mm.

[0027] In yet another optional embodiment, the width of the feeding trough 22 is 0.1~1mm.

[0028] In yet another optional embodiment, the thickness of the nail head 2 is 1-2 mm.

[0029] In another optional embodiment, the pressing teeth 21 are formed by sequentially opening a plurality of grooves 24 along the circumferential direction on the outer peripheral surface of the bottom end of the nail head 2, with each groove located between two adjacent saw teeth 211.

[0030] In yet another alternative embodiment, the sharp corners 2111 of the serrations 211 face away from the axis of the weld stud.

[0031] In yet another optional embodiment, the serration 211 has a sharp angle of 30 to 150 degrees.

[0032] In another optional embodiment, the top of the nail body 1 is further provided with a straight section 11 with a height of 0.7-0.9mm, and the bottom of the straight section is connected to the external thread portion 12 of the nail body 1.

[0033] In yet another alternative embodiment, the weld stud is made of hardened carbon steel.

[0034] In yet another optional embodiment, the pitch of the external thread of the nail body 1 is 1.5-1.7 mm.

[0035] In yet another alternative embodiment, the surface of the weld stud is provided with a rust-proof coating.

[0036] The contents disclosed in this utility model embodiment are merely preferred embodiments of this utility model and are only used to illustrate the technical solutions of this utility model, not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A welding stud for new energy vehicles, comprising a stud body and a stud head, wherein the stud body is located below the stud head, the stud body is an externally threaded post, and the plate material of the new energy vehicle requires pre-installation of the welding stud, characterized in that, The bottom end of the nail head is provided with pressing teeth on its outer peripheral surface, and the pressing teeth are composed of a plurality of serrations that are continuously and adjacently distributed on the outer peripheral surface; The bottom of the nail head is provided with a feeding groove at the position where it contacts the nail body; the feeding groove and the pressing teeth are embedded into the plate by a stamping process to fix the welding nail to the plate; the top of the nail head is welded to the plate by a welding process.

2. The fastener of claim 1 wherein, The outer circumferential surface of the pressure tooth has a thickness of 0.1 to 1.5 mm.

3. The fastener of claim 1 wherein, The width of the feeding trough is 0.1 to 1 mm.

4. The fastener of claim 1 wherein, The thickness of the nail head is 1-2 mm.

5. The fastener of claim 1 wherein, The pressure teeth are formed by sequentially opening multiple grooves along the circumferential direction on the outer circumferential surface of the bottom end of the nail head. Each groove is located between two adjacent saw teeth.

6. The fastener of claim 1 wherein, The sharp corners of the serrations face away from the axis of the weld stud.

7. The fastener of claim 1 wherein, The sharp angle of the saw teeth is 30 to 150 degrees.

8. The fastener of claim 1 wherein, The welding studs are made of hardened carbon steel.

9. The fastener of claim 1 wherein, The top of the nail body is also provided with a straight section with a height of 0.7-0.9mm, and the bottom of the straight section is connected to the external threaded part of the nail body.

10. The fastener of claim 1 wherein, The surface of the welding stud is provided with an anti-rust coating.

Images