Special nut pressure welding electrode for automobile industry

Abstract

The utility model belongs to the technical field of automobile pressure welding, especially is six foot special type nut pressure welding electrode of automobile industry, including upper electrode and matched lower electrode, be equipped with die sleeve on lower electrode, upper electrode includes upper fixed block, is equipped with with six foot special type nut's down pressure leg on upper fixed block, be equipped with die sleeve for six foot special type nut positioning on lower electrode. The utility model discloses through setting up with six foot special type nut matched upper electrode, and cooperate lower electrode, make the down pressure foot on upper fixed block and six foot special type nut's six foot matching setting, pressure concentration and point to point matching welding, effectively eliminated the problem such as insufficient fusion depth in projection welding, cannot weld etc. bad quality;Through setting up die sleeve on lower electrode, effectively guarantee six foot special type nut positioning, avoid six foot special type nut displacement in the process of pressure application, can prevent six foot special type nut from deforming under the condition of uneven pressure application simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of automotive pressure welding technology, and in particular to a pressure welding electrode for a six-pin special type nut in the automotive industry. Background Technology

[0002] Projection welding, a branch of resistance welding, achieves metallurgical bonding between metal atoms by concentrating current and pressure through pre-designed projection points. During welding, the projection points first contact the base material surface. Under the combined action of electrode pressure and high-density current, the projection points rapidly melt and collapse to form a weld nugget, which eventually cools and solidifies into a high-strength connection. This process is particularly suitable for the batch connection of thin plates (0.5–4 mm) with fasteners (such as nuts and bolts) in automobile manufacturing. The special hexagonal projection welding connection method of the rear underbody bracket involved in this invention cannot be effectively covered by ordinary conventional electrodes, resulting in obvious defects such as insufficient penetration and protrusions, which do not meet quality requirements. Therefore, this is a technical problem that urgently needs to be solved. Utility Model Content

[0003] This utility model provides a special six-pin nut pressure welding electrode for the automotive industry, which solves the problem that existing electrodes cannot effectively cover the surface and produce obvious defects such as insufficient penetration and protrusions, thus failing to meet quality requirements.

[0004] This utility model provides the following technical solution:

[0005] The pressure welding electrode for a six-pin special nut in the automotive industry includes an upper electrode and a matching lower electrode. The lower electrode is provided with a mold sleeve. The upper electrode includes an upper fixing block, which is provided with a lower pressure leg that corresponds to the six-pin special nut. The lower electrode is provided with a mold sleeve for positioning the six-pin special nut.

[0006] This invention features an upper electrode that matches a six-pin special-type nut, allowing the lower pressure foot on the upper fixing block to match the six pins of the nut. This concentrated pressure and point-to-point welding effectively eliminates problems such as insufficient penetration and welding failure in projection welding. Furthermore, the invention's specially designed copper electrode mechanism serves as the contact surface, significantly improving quality while also reducing labor time and the consumption of grinding materials.

[0007] Furthermore, the lower pressure leg is integrally formed with the upper fixing block, and the six lower pressure legs are distributed in a matrix at the lower end of the upper fixing block and extend downward. The six lower pressure legs are matched with the six feet on the six-foot special-type nut, which ensures the pressure of the lower pressure legs on the six-foot special-type nut is concentrated. The point-to-point matching ensures the penetration depth of the six feet of the six-foot special-type nut during projection welding.

[0008] Furthermore, the lower pressure leg and the upper fixing block are provided with first clearance grooves on their front and rear sides, and the lower pressure leg and the upper fixing block are flush with each other. The first clearance grooves facilitate the installation of the upper fixing block.

[0009] Furthermore, a first positioning hole is provided between the lower pressing legs, the first positioning hole is close to the front and rear sides of the upper fixing block, and a first electrode hole is provided in the middle of the upper fixing block.

[0010] Furthermore, the lower electrode includes a lower fixing block, with a second clearance groove provided at each of the four corners of the lower fixing block, a second fixing hole provided in the second clearance groove, and two second electrode holes provided on the lower fixing block.

[0011] Furthermore, the lower fixing block is provided with a third clearance groove on both sides, a compensation block is provided in the third clearance groove, a third fixing hole is provided on the compensation block, and a first through hole is provided on the left and right ends of the lower fixing block, and the first through hole is connected to the second electrode hole.

[0012] Furthermore, the mold sleeve includes an integrally formed frame and a retainer. The retainer is engaged within the third clearance groove, and the frame is laid on the upper surface of the lower fixing block. The mold sleeve is used to position the six-pin special-type nut, preventing displacement during welding and ensuring welding quality.

[0013] Furthermore, the frame is provided with a second through hole that matches the six-pin special type nut.

[0014] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0015] In this invention, by setting an upper electrode that matches the six-pin special-type nut and cooperating with the lower electrode, the lower pressure foot on the upper fixing block is matched with the six pins of the six-pin special-type nut. The pressure is concentrated and the point-to-point matching welding is performed, which effectively eliminates the problems of insufficient penetration depth and inability to weld in projection welding.

[0016] By setting a mold sleeve on the lower electrode, the positioning of the six-pin special nut is effectively guaranteed, preventing the six-pin special nut from shifting during the pressure application process. At the same time, it can prevent the six-pin special nut from deforming under uneven pressure.

[0017] By setting a third clearance groove, the installation and positioning of the mold sleeve are facilitated, and displacement of the mold sleeve is prevented. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the upper fixed block;

[0019] Figure 2 This is a longitudinal cross-sectional view of the upper fixed block;

[0020] Figure 3 This is a three-dimensional schematic diagram of the upper fixed block when it is placed on its side;

[0021] Figure 4 This is a cross-sectional view of the lower fixed block;

[0022] Figure 5 This is a longitudinal cross-sectional view of the lower fixed block;

[0023] Figure 6 This is a three-dimensional schematic diagram of the lower fixed block;

[0024] Figure 7 This is a schematic diagram of the mold installation.

[0025] Figure 8 A schematic diagram of welding a six-pin special type nut;

[0026] Figure 9 A schematic diagram of a nut bracket structure for a six-pin special type nut;

[0027] 1. Upper fixing block; 2. Positioning protrusion; 3. First positioning hole; 4. First clearance groove; 5. First electrode hole; 6. Lower pressure leg; 7. Rounded corner; 8. Lower fixing block; 9. Second electrode hole; 10. First through hole; 11. Second clearance groove; 12. Second positioning hole; 13. Third positioning hole; 14. Compensation block; 15. Third clearance groove; 16. Tapered hole; 17. Mold sleeve; 18. Card holder; 19. Second through hole; 20. Nut bracket; 21. Bracket foot. Detailed Implementation

[0028] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0029] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0030] In this embodiment of the invention, 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. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0031] In this embodiment of the utility model, "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0032] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0033] Example

[0034] Reference Figures 1-8 A pressure welding electrode for a six-pin special nut in the automotive industry includes an upper electrode and a matching lower electrode. The lower electrode has a mold sleeve 17. The upper electrode includes an upper fixing block 1 with a lower pressure leg 6 that matches the six-pin special nut. The lower electrode has a mold sleeve 17 for positioning the six-pin special nut. Preferably, the mold sleeve 17 includes an integrally formed frame and a clamping bracket 18. The clamping bracket 18 is engaged within a third recessed groove 15. The frame is laid on the upper surface of the lower fixing block 8, and the frame has a second through hole 19 that matches the six-pin special nut. The mold sleeve 17 is used to position the six-pin special nut, preventing displacement during welding and ensuring welding quality.

[0035] This invention, by setting an upper electrode that matches a six-pin special-type nut, allows the lower pressure foot on the upper fixing block 1 to match the six pins of the six-pin special-type nut, concentrating pressure and performing point-to-point matching welding, effectively eliminating the problems of insufficient penetration and inability to weld in projection welding. This invention also designs a special-type copper electrode mechanism as the contact surface, effectively improving quality, while also reducing the time spent on grinding and the consumption of grinding auxiliary materials.

[0036] In this embodiment, the lower pressure leg 6 is integrally formed with the upper fixing block 1. The six lower pressure legs 6 are distributed in a matrix at the lower end of the upper fixing block 1 and extend downward. The six lower pressure legs 6 are matched with the six feet on the six-foot special-type nut, ensuring concentrated pressure from the lower pressure legs on the six-foot special-type nut. This point-to-point matching ensures the penetration depth of the six feet of the six-foot special-type nut during projection welding. Preferably, the lower pressure legs 6 and the front and rear sides of the upper fixing block 1 are provided with first clearance grooves 4, and the lower pressure legs 6 and the left and right sides of the upper fixing block 1 are flush. The first clearance grooves 4 facilitate the installation of the upper fixing block 1. The lower pressure legs 6 are provided with first positioning holes 3, which are close to the front and rear sides of the upper fixing block 1. The upper fixing block 1 is provided with a first electrode hole 5 in the middle. There are four first positioning holes 3. Two positioning holes are provided on both the front and rear sides of the upper fixing block 1 to improve the installation and fixing effect of the upper fixing block 1. The lower pressing leg 6 has a rounded corner 7 on the side near the first positioning hole 3 to facilitate the installation of the positioning bolt. The top of the upper fixing block 1 is provided with a positioning protrusion 2 to play a positioning role in the installation of the upper fixing block 1.

[0037] In another embodiment, the difference is that the lower pressure leg 6 is detachably connected to the lower end of the upper fixing block 1 via a thread, so as to avoid excessive wear of the lower pressure leg 6 after long-term use, which would cause uneven pressure and affect the welding quality.

[0038] In this embodiment, the lower electrode includes a lower fixing block 8, and each of the four corners of the lower fixing block 8 is provided with a second clearance groove 11. The second clearance groove 11 is provided with a second fixing hole, and the lower fixing block 8 is provided with two second electrode holes 9.

[0039] The lower fixing block 8 has a third clearance groove 15 on both sides, a compensation block 14 in the third clearance groove 15, a third fixing hole on the compensation block 14, and a first through hole 10 on the left and right ends of the lower fixing block 8. The first through hole 10 is connected to the second electrode hole 9. The bottom of the lower fixing block 8 has a positioning seat, and a conical hole 16 is opened in the positioning seat. The positioning seat is used to position the lower fixing block 8 to prevent the lower fixing block 8 from deviating during installation.

[0040] This invention, by setting an upper electrode that matches the six-pin special-type nut and cooperating with the lower electrode, ensures that the lower pressure foot on the upper fixing block 1 matches the six pins of the six-pin special-type nut, concentrating pressure and performing point-to-point matching welding, effectively eliminating the problems of insufficient penetration and inability to weld in projection welding; by setting a mold sleeve 17 on the lower electrode, the positioning of the six-pin special-type nut is effectively guaranteed, preventing displacement of the six-pin special-type nut during pressure application, and preventing deformation of the six-pin special-type nut under uneven pressure; by setting a third clearance groove 15, the installation and positioning of the mold sleeve 17 are facilitated, preventing displacement of the mold sleeve 17.

[0041] In this embodiment, as Figure 9 As shown, the six-legged special type nut includes a nut and a nut bracket 20. The nut bracket 20 is provided with 6 bracket legs 21, which are the six legs of the six-legged special type nut in this utility model.

[0042] The working principle of this application is as follows: During use, the upper fixing block 1 is first installed and fixed on the equipment through the first positioning hole 3, and the electrode is inserted into the first electrode hole 5; then the lower fixing block 8 is installed on the equipment through the second positioning hole 12, and the tapered hole 16 at the bottom is connected to the equipment. Then the electrode is inserted into the electrode hole and fixed in the first through hole 10 through the set screw. Then the mold sleeve 17 is installed on the lower fixing block 8, and the bracket 18 on the mold sleeve 17 is fixed through the third positioning hole 13. Then the six-pin special nut is installed on the mold sleeve 17, and the position of the nut to be welded on the automotive sheet is aligned with the six-pin special nut. Then the equipment drives the upper fixing block 1 to press down and energize to weld and fix the six pins of the six-pin special nut to the automotive sheet, thereby realizing the welding operation.

[0043] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A special six-pin nut pressure welding electrode for the automotive industry, comprising an upper electrode and a matching lower electrode, wherein the lower electrode is provided with a mold sleeve, characterized in that: The upper electrode includes an upper fixing block, which has a lower pressure leg for a six-legged special-type nut, and the lower electrode has a mold for positioning the six-legged special-type nut.

2. The automotive industry six-pin special type nut pressure welding electrode according to claim 1, characterized in that: The lower pressing leg is integrally formed with the upper fixing block, and the six lower pressing legs are distributed in a matrix at the lower end of the upper fixing block and extend downward.

3. The automotive industry six-pin special type nut pressure welding electrode according to claim 2, characterized in that: The lower pressing leg and the upper fixing block are provided with first clearance grooves on the front and rear sides, and the lower pressing leg and the upper fixing block are flush with each other.

4. The automotive industry six-pin special type nut pressure welding electrode according to claim 3, characterized in that: A first positioning hole is provided between the lower pressing legs. The first positioning hole is located near the front and rear sides of the upper fixing block. A first electrode hole is provided in the middle of the upper fixing block.

5. The automotive industry six-pin special type nut pressure welding electrode according to claim 1, characterized in that: The lower electrode includes a lower fixing block, and each of the four corners of the lower fixing block is provided with a second clearance groove. The second clearance groove is provided with a second fixing hole, and the lower fixing block is provided with two second electrode holes.

6. The automotive industry six-pin special type nut pressure welding electrode according to claim 5, characterized in that: The lower fixing block is provided with a third clearance groove on both sides, and a compensation block is provided in the third clearance groove. The compensation block is provided with a third fixing hole. The left and right ends of the lower fixing block are provided with a first through hole, and the first through hole is connected to the second electrode hole.

7. The automotive industry six-pin special type nut pressure welding electrode according to claim 1, characterized in that: The mold includes an integrally formed frame and a clip, with the clip being engaged in the third clearance groove and the frame being laid on the upper surface of the lower fixing block.

8. The automotive industry six-pin special type nut pressure welding electrode according to claim 7, characterized in that: The frame is provided with a second through hole that matches the six-pin special type nut.

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