A projection welding bolt for automobile sheet metal and an automobile

Abstract

This application discloses a projection weld bolt for automotive sheet metal, comprising: a base and a stud connected to the base; a welding structure, a limiting structure, and a sealing structure are provided on the side of the base near the stud; the welding structure protrudes from the surface of the base and is wrapped around the outer periphery of the stud; the limiting structure protrudes from the surface of the base and is wrapped around the outer periphery of the welding structure, the protrusion height of the limiting structure being less than the protrusion height of the first welding structure; the sealing structure protrudes from the surface of the base and is wrapped around the outer periphery of the limiting structure. The projection weld bolt for automotive sheet metal of this application achieves reliable welding between the projection weld bolt and the sheet metal by setting the welding structure and the limiting structure, providing a first layer of sealing at the weld joint; by setting the sealing structure, a second layer of sealing is provided at the weld joint. Compared with the prior art, the projection weld bolt for automotive sheet metal has better sealing performance and provides higher installation point strength.

Description

Technical Field

[0001] This application relates to the automotive field, and more particularly to a projection weld bolt for automotive sheet metal and an automotive product. Background Technology

[0002] As society develops, people have increasingly higher requirements for automobiles, moving from basic safety and performance stability to comfort, such as NVH (noise, vibration, and harshness) performance. Among these, the sealing of the vehicle assembly has a significant impact on the overall NVH of the vehicle.

[0003] Currently, the use of projection weld bolts in automobile body panels is extensive, distributed across sheet metal parts in the engine compartment, passenger compartment, and trunk. In existing technology, to ensure the strength of the projection weld bolt mounting point, the bolt stud is passed through a pre-drilled sheet metal section before welding. However, due to its structural design and the influence of weld quality, the sealing performance at the projection weld bolt location is very poor.

[0004] To improve the sealing of the weld, existing projection weld bolts are directly welded to the sheet metal surface. However, projection weld bolts directly welded to the sheet metal surface have low installation point strength and are prone to falling off. Summary of the Invention

[0005] This application provides a projection weld bolt for automotive sheet metal and an automobile. By setting a welding structure and a limiting structure, reliable welding of the projection weld bolt and the sheet metal is achieved, providing a first layer of sealing at the weld joint. By setting a sealing structure, a second layer of sealing is achieved at the weld joint. Compared with the prior art, the projection weld bolt for automotive sheet metal has better sealing performance and provides higher installation point strength.

[0006] On the one hand, this application provides a projection weld bolt for automotive sheet metal, including a base and a stud connected to the base;

[0007] The base is provided with a welding structure, a limiting structure and a sealing structure on the side near the stud;

[0008] The welding structure protrudes from the surface of the base and is arranged around the outer periphery of the stud.

[0009] The limiting structure protrudes from the surface of the base and is arranged around the outer periphery of the welding structure. The protrusion height of the limiting structure is less than the protrusion height of the welding structure.

[0010] The sealing structure protrudes from the surface of the base and is arranged around the outer periphery of the limiting structure.

[0011] Preferably, the protrusion height of the sealing structure is greater than the protrusion height of the limiting structure.

[0012] Preferably, the sealing structure is provided with a fixedly connected embedded part and a sealing protrusion, the embedded part being embedded in the base and the sealing protrusion protruding from the surface of the base.

[0013] Preferably, the sealing structure includes a zinc ring.

[0014] Preferably, the welding structure, the limiting structure, and the sealing structure are coaxial with the stud.

[0015] Preferably, the welding structure includes a welding convex ring, which is a triangular ring, a boss ring, or a convex circular ring.

[0016] Preferably, the limiting structure includes a limiting boss ring.

[0017] Preferably, the sealing protrusion includes a sealing convex ring.

[0018] Preferably, the welding structure and the limiting structure are connected together.

[0019] On the other hand, this application provides an automobile, including a projection weld bolt for automobile sheet metal and sheet metal as described in any of the above claims, wherein the projection weld bolt for automobile sheet metal is welded to the sheet metal via the welding structure.

[0020] The projection weld bolt for automotive sheet metal and the automobile provided in this application have the following beneficial effects:

[0021] The projection weld bolt for automotive sheet metal in this application achieves reliable welding between the projection weld bolt and the sheet metal by setting a welding structure and a limiting structure, thus providing a first layer of sealing at the weld joint. By setting a sealing structure, a second layer of sealing is achieved at the weld joint. Compared with the prior art, the projection weld bolt for automotive sheet metal has better sealing performance and provides higher strength at the mounting point. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a projection weld bolt and sheet metal welding structure in the prior art.

[0024] Figure 2 This is a schematic diagram of another existing projection weld bolt and sheet metal welding structure.

[0025] Figure 3 A cross-sectional view of a projection weld bolt for automotive sheet metal is provided as an embodiment of this application;

[0026] Figure 4 A schematic diagram of a projection weld bolt and sheet metal welding structure for automotive sheet metal is provided in an embodiment of this application;

[0027] Figure 5 A schematic diagram of a projection weld bolt structure for automotive sheet metal is provided in an embodiment of this application;

[0028] Figure 6 A top view of a projection weld bolt for automotive sheet metal, provided as an embodiment of this application;

[0029] Figure 7 A front view of a projection weld bolt for automotive sheet metal, provided as an embodiment of this application;

[0030] Figure 8 Another partial view of the base provided for an embodiment of this application.

[0031] The following is supplementary explanation of the attached figures:

[0032] 1-Base; 11-Welded structure; 12-Limiting structure; 13-Sealing structure; 131-Embedded part; 132-Sealing protrusion; 2-Stud; 3-Sheet metal. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0034] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, 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 number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0035] To facilitate the explanation of the advantages of the projection weld bolts used in automotive sheet metal in the embodiments of this application, the relevant content of the prior art is first summarized at the beginning of the detailed description of the technical solutions of the embodiments of this application:

[0036] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a projection weld bolt and sheet metal welding structure in the prior art. The sheet metal 5 is provided with a through hole 51 for the stud of the projection weld bolt 4 to pass through. The stud of the projection weld bolt 4 passes through the through hole 51, and the flange face of the bolt head of the projection weld bolt 4 is welded to the sheet metal 5 to achieve the fixing of the projection weld bolt 4.

[0037] Figure 1 Although the projection weld bolt 4 can provide a high-strength mounting point, the sealing performance at the projection weld bolt 4 is very poor due to the through-hole design of the sheet metal 5 and the influence of the welding surface quality.

[0038] Please refer to Figure 2 , Figure 2 This is a schematic diagram of another existing projection weld bolt and sheet metal welding structure. The bolt head of the projection weld bolt 6 is directly welded to the sheet metal 7 on the side away from the stud, thereby fixing the projection weld bolt 6.

[0039] Figure 2 Although the projection weld bolt 6 can ensure the sealing at the projection weld bolt 6, the projection weld bolt 6 is directly welded to the sheet metal 7, resulting in low strength of the mounting point provided by the projection weld bolt 6, and the projection weld bolt 6 is easy to fall off.

[0040] The above analysis shows that the existing technology of welding the projection bolt to the sheet metal cannot simultaneously achieve both the sealing effect at the projection bolt and the strength of the mounting point provided by the projection bolt. In view of the shortcomings of the existing technology, the projection bolt for automotive sheet metal in this application achieves reliable welding between the projection bolt and the sheet metal by setting a welding structure and a limiting structure, which plays a first-layer sealing role at the weld joint; by setting a sealing structure, a second-layer sealing role at the weld joint is achieved. Compared with the existing technology, the projection bolt for automotive sheet metal has better sealing performance and provides higher mounting point strength.

[0041] Please refer to Figure 3 , Figure 3 This application provides a cross-sectional view of a projection weld bolt for automotive sheet metal, which includes a base 1 and a stud 2 connected to the base 1. The base 1 has a welding structure 11, a limiting structure 12, and a sealing structure 13 on the side near the stud 2. The welding structure 11 protrudes from the surface of the base 1 and is arranged around the outer periphery of the stud 2. The limiting structure 12 protrudes from the surface of the base 1 and is arranged around the outer periphery of the welding structure 11, with the protrusion height of the limiting structure 12 being less than the protrusion height of the first welding structure 11. The sealing structure 13 protrudes from the surface of the base 1 and is arranged around the outer periphery of the limiting structure 12.

[0042] In one embodiment, please refer to Figure 4 The projection weld bolts used for automotive sheet metal are welded to the perforated sheet metal 3 using projection welding equipment. The projection weld bolts used for automotive sheet metal, which are welded to the sheet metal 3, provide mounting points for other components. The projection weld bolts used for automotive sheet metal include a base 1 and a stud 2 fixedly connected to the base 1. The base 1 is used for welding to the sheet metal, and the stud 2 is used to provide mounting points for other components.

[0043] Furthermore, the base 1 is provided with a welding structure 11, a limiting structure 12 and a sealing structure 13 on the side near the stud 2.

[0044] Furthermore, the welding structure 11 protrudes from the surface of the base 1 and is arranged around the outer periphery of the stud 2.

[0045] Specifically, the welding structure 11 protrudes from the surface of the base 1. The welding structure 11 provides material for welding the projection bolts of the automotive sheet metal to the sheet metal 3. The welding structure 11 is heated and melted under the action of welding current to form a molten pool. The molten pool contacts the lower surface of the sheet metal 3. After cooling, the molten pool seals the base 1 and the sheet metal 3 together. The cooled molten pool forms the first layer of seal at the projection bolts of the automotive sheet metal.

[0046] Preferably, the welding structure 11 is a uniform, full-circumferential circular structure surrounding the stud 2, so that the molten pool formed by the welding structure 11 under the action of welding current is also a uniform, full-circumferential circular structure, so as to ensure better sealing at the projection weld bolts used for automotive sheet metal and the welding strength between the projection weld bolts used for automotive sheet metal and the sheet metal 3.

[0047] Preferably, the welding structure 11 is not connected to the stud 2, and a certain space is left between the welding structure 11 and the stud 2 to accommodate the molten pool formed by the welding structure 11 being heated and melted under the action of welding current.

[0048] Meanwhile, the limiting structure 12 protrudes from the surface of the base 1 and is arranged around the outer periphery of the welding structure 11, and the protrusion height of the limiting structure 12 is less than the protrusion height of the welding structure 11.

[0049] Specifically, the limiting structure 12, whose protrusion height is less than that of the welded structure 11, is used to limit the melting height of the welded structure 11 and provide space for the flow of the molten pool formed by the welded structure 11 under the action of welding current, close to the stud 2. This ensures better contact between the molten pool and the lower surface of the sheet metal 3, achieving more reliable welding between the welded structure 11 and the sheet metal 3. The sealing performance of the projection weld bolts used in automotive sheet metal is better, and the welding strength between the projection weld bolts used in automotive sheet metal and the sheet metal 3 is higher. The mounting point strength provided by the projection weld bolts used in automotive sheet metal is also higher.

[0050] Preferably, the limiting structure 12 is a uniform, full-circumference circular structure surrounding the outer periphery of the welding structure 11, corresponding to the uniform, full-circumference circular structure of the welding structure 11, so as to ensure better sealing at the projection weld bolts used for automotive sheet metal and the welding strength between the projection weld bolts used for automotive sheet metal and the sheet metal 3.

[0051] Meanwhile, the sealing structure 13 protrudes from the surface of the base 1 and is arranged around the outer periphery of the limiting structure 12.

[0052] Specifically, the sealing structure 13 protruding from the surface of the base 1 contacts the lower surface of the sheet metal 3, forming a second layer of seal at the projection weld bolts used in automotive sheet metal.

[0053] Preferably, the sealing structure 13 is a uniform, full-circumference annular structure surrounding the limiting structure 12 to ensure better sealing at the projection weld bolts used in automotive sheet metal, forming a second layer of seal at the projection weld bolts used in automotive sheet metal.

[0054] Preferably, the sealing structure 13 and the limiting structure 12 are not connected. The gap between the sealing structure 13 and the limiting structure 12 can accommodate the deformation of the sealing structure 13 and facilitates manufacturing.

[0055] In another embodiment, please refer to Figure 8 The sealing structure 13 is connected to the limiting structure 12. The inner circumference of the sealing structure 13 in the radial direction contacts the outer circumference of the limiting structure 12 in the radial direction. This can reduce the sealing space between the sealing structure 13 and the limiting structure 12 after the projection welding bolts used for automotive sheet metal are welded and pressed, and reduce the amount of air residue in the sealing space. The structure is also compact, saving space occupied by the base 1.

[0056] The projection weld bolts for automotive sheet metal provided in this application achieve reliable welding between the projection weld bolts and sheet metal 3 by setting a welding structure 11 and a limiting structure 12, thus achieving a first layer of sealing at the weld joint; by setting a sealing structure, a second layer of sealing at the weld joint is achieved. Compared with the prior art, the projection weld bolts for automotive sheet metal have better sealing performance and provide higher installation point strength.

[0057] The projection welding bolts for automotive sheet metal provided in this application embodiment can be used to install heavy components after welding with the sheet metal, and can ensure the operating environment of electronic components when applied to locations with electronic components.

[0058] In this embodiment, the protrusion height of the sealing structure 13 is greater than the protrusion height of the limiting structure 12.

[0059] In one embodiment, the protrusion height of the sealing structure 13 is greater than that of the limiting structure 12 to ensure full contact between the sealing structure 13 and the sheet metal 3, thereby achieving a second seal at the projection weld bolt of the automotive sheet metal, which can compensate for the lack of sealing performance between the welding structure 11 and the sheet metal 3 due to unreliable welding.

[0060] In this embodiment, the sealing structure 13 is provided with a fixedly connected embedded part 131 and a sealing protrusion 132. The embedded part 131 is embedded in the base 1, and the sealing protrusion 132 protrudes from the surface of the base 1.

[0061] In one embodiment, the sealing structure 13 is integrally formed with the projection weld bolt for automotive sheet metal in an inlay form. As an insert for the projection weld bolt for automotive sheet metal, the sealing structure 13 can be firmly embedded in the base 1 and is not easy to fall off.

[0062] Furthermore, the sealing structure 13 includes a fixedly connected embedded part 131 and a sealing protrusion 132, wherein the embedded part 131 is embedded in the base 1, and the sealing protrusion 132 protrudes from the surface of the base 1.

[0063] In this embodiment, the sealing structure 13 includes a zinc ring.

[0064] In one embodiment, the sealing structure 13 is a uniform circumferential zinc ring surrounding the outer periphery of the limiting structure 12.

[0065] Specifically, zinc is a soft material. When the zinc ring is subjected to welding pressure, the highest part of the zinc ring will be flattened. The flattened zinc ring makes more full contact with the lower surface of the sheet metal 3, which can better ensure the second layer of seal at the weld.

[0066] Meanwhile, zinc is more chemically reactive than iron, making it more susceptible to electrochemical corrosion of other materials, thus preventing rust and corrosion at the weld joints of projection weld bolts used in automotive sheet metal.

[0067] In this embodiment, the welding structure 11, the limiting structure 12, and the sealing structure 13 are coaxial with the stud 2.

[0068] In one embodiment, the welding structure 11, the limiting structure 12, and the sealing structure 13 are all coaxially arranged with the stud 2, ensuring the aesthetics of the projection weld bolts used in automotive sheet metal, ease of manufacturing, and ease of assembly and welding with the sheet metal 3. Please refer to [reference needed]. Figure 5 , Figure 6 and Figure 7 .

[0069] In this embodiment, the welding structure 11 and the limiting structure 12 are connected together.

[0070] In one embodiment, the welding structure 11 and the limiting structure 12 are connected, wherein the outer periphery of the welding structure 11 in the radial direction is in contact with the inner periphery of the limiting structure 12 in the radial direction. The connection between the welding structure 11 and the limiting structure 12 can save structural space, limit the melting height of the welding structure 11, and provide space for the flow of the molten pool formed by the welding structure 11 under the action of welding current near the stud 2.

[0071] In this embodiment, the welding structure 11 includes a welding convex ring, which can be a triangular ring, a boss ring, or a convex circular ring. The welding structure 11 is integrally formed with the base 1, resulting in a robust structure that is easy to manufacture. Please refer to [reference needed]. Figure 3 .

[0072] In one embodiment, the inner diameter of the welded structure 11 is (1.1-1.15)R, the outer diameter of the welded structure 11 is (1.4-1.5)R, and the height of the welded structure 11 protruding from the base 1 is (0.15-0.25)R, where R is the outer diameter of the stud 2.

[0073] In this embodiment, the limiting structure 12 includes a limiting boss ring. The limiting structure 12 is integrally formed with the base 1, resulting in a robust structure that is easy to manufacture. Please refer to [reference needed]. Figure 3 .

[0074] In one embodiment, specifically, the inner diameter of the limiting structure 12 is (1.4-1.5)R, the difference between the outer diameter and the inner diameter of the limiting structure 12 is (0.1-0.15)R, and the height of the limiting structure 12 protruding from the base 1 is (0.05-0.08)R, where R is the outer diameter of the stud 2.

[0075] In this embodiment, the sealing protrusion 132 includes a sealing convex ring. The sealing protrusion 132, as part of the sealing structure 13, is integrally formed with the base 1, resulting in a robust structure that is easy to manufacture. Please refer to [reference needed]. Figure 3 .

[0076] In one embodiment, specifically, the inner diameter of the sealing protrusion 132 is (1.6-1.7)R, the outer diameter of the sealing protrusion 132 is (1.9-2)R, the height of the sealing structure 13 protruding from the base 1 is (0.1-0.15)R, and the difference between the inner diameter of the sealing structure 13 and the outer diameter of the limiting structure is 0.1R, where R is the outer diameter of the stud 2.

[0077] By combining and setting specific parameters of welding structure 11, limiting structure 12 and sealing structure 13, better welding of projection bolts for automotive sheet metal and sheet metal 3 can be achieved, better sealing at projection bolts for automotive sheet metal and higher installation point strength provided by projection bolts for automotive sheet metal.

[0078] The projection weld bolts for automotive sheet metal provided in this embodiment achieve reliable welding between the projection weld bolts and sheet metal 3 by setting a welding structure 11 and a limiting structure 12, thus achieving a first layer of sealing at the weld joint; by setting a zinc ring sealing structure, a second layer of sealing at the weld joint is achieved, and at the same time, it can also play a role in preventing rust and corrosion.

[0079] In addition, this application embodiment also provides an automobile, including the projection weld bolts for automobile sheet metal and sheet metal 3 as described above, wherein the projection weld bolts for automobile sheet metal are welded to sheet metal 3 through welding structure 11.

[0080] The automobile in this embodiment includes the projection weld bolts for automobile sheet metal as described above. The projection weld bolts for automobile sheet metal achieve reliable welding between the projection weld bolts and the sheet metal 3 by setting the welding structure 11 and the limiting structure 12, which plays a first-layer sealing role at the weld joint. By setting the sealing structure of zinc ring, a second-layer sealing role at the weld joint is achieved, and at the same time, it can also play a role in rust prevention and corrosion prevention.

[0081] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A projection-welded bolt for use in automobile sheet metal, characterized by, It includes a base (1) and a stud (2) connected to the base (1); The base (1) is provided with a welding structure (11), a limiting structure (12) and a sealing structure (13) on the side near the stud (2); The welding structure (11) protrudes from the surface of the base (1) and is arranged around the outer periphery of the stud (2); The limiting structure (12) protrudes from the surface of the base (1) and is arranged around the outer periphery of the welding structure (11). The protrusion height of the limiting structure (12) is less than the protrusion height of the welding structure (11). The sealing structure (13) protrudes from the surface of the base (1) and is arranged around the outer periphery of the limiting structure (12). The protrusion height of the sealing structure (13) is greater than the protrusion height of the limiting structure (12).

2. The projection weld bolt for automotive sheet metal as described in claim 1, characterized in that, The sealing structure (13) is provided with a fixedly connected embedded part (131) and a sealing protrusion (132). The embedded part (131) is embedded in the base (1), and the sealing protrusion (132) protrudes from the surface of the base (1).

3. The projection weld bolt for automotive sheet metal as described in claim 1, characterized in that, The sealing structure (13) includes a zinc ring.

4. The projection weld bolt for automotive sheet metal as described in claim 1, characterized in that, The welding structure (11), the limiting structure (12), and the sealing structure (13) are coaxial with the stud (2).

5. The projection weld bolt for automotive sheet metal as described in claim 1, characterized in that, The welding structure (11) includes a welding convex ring, which is a triangular ring, a boss ring, or a convex circular ring.

6. The projection weld bolt for automotive sheet metal as described in claim 1, characterized in that, The limiting structure (12) includes a limiting boss ring.

7. The projection weld bolt for automotive sheet metal as described in claim 2, characterized in that, The sealing protrusion (132) includes a sealing convex ring.

8. The projection weld bolt for automotive sheet metal as described in claim 1, characterized in that, The welding structure (11) and the limiting structure (12) are connected together.

9. A car, characterized in that, Includes the projection weld bolt for automotive sheet metal as described in any one of claims 1-8 and the sheet metal, wherein the projection weld bolt for automotive sheet metal is welded to the sheet metal via the welding structure (11).

Images