Nut projection welding quality rapid inspection tool

Abstract

The utility model discloses a kind of nut projection welding quality rapid inspection tool, including detection table (1), the detection table (1) is equipped with projection welding nut welding assembly (3) and pressing plate (4), the projection welding nut welding assembly (3) is located in the middle part of pressing plate (4), the detection table (1) is equipped with placing groove (2), the projection welding nut welding assembly (3) is placed in placing groove (2), the pressing plate (4) is equipped with multiple detection components for detecting the welding quality of projection welding nut welding assembly (3), and detection component (6) is divided into the structure for detecting vertical direction and the structure of detecting horizontal direction;Utilize detection component, compared with prior art, increase the stress direction of projection welding nut welding assembly (3) inspection, improve inspection effect, and increase the pressure vertical inspection in vertical direction, so that inspection data is more abundant, guarantee the accuracy of inspection.

Description

Technical Field

[0001] This utility model belongs to the field of testing device technology. Specifically, this utility model relates to a tooling for rapid inspection of the welding quality of nut projections. Background Technology

[0002] In the modern automotive industry, many car body parts are welded with projection weld nuts (hereinafter referred to as projection weld nuts) during assembly. These nuts are welded using pressure welding, and the welding strength testing of the nuts is crucial. During the production process, it is necessary to test the weld strength of the projection weld nuts on the manufactured products.

[0003] A specification published on April 19, 2024, with application number 202322523418.8, discloses a testing device for detecting the weld strength of projection weld nuts, comprising: a worktable for mounting various parts; a first clamping assembly for clamping a first end of the projection weld nut assembly to be tested; the first clamping assembly is disposed on the worktable; a projection weld nut positioning groove for receiving a second end of the projection weld nut assembly to be tested; the projection weld nut positioning groove is disposed on the worktable; a striking pin assembly for acting on the projection weld nut assembly to be tested; the striking pin assembly is disposed on the worktable and located directly above the projection weld nut positioning groove; a guide assembly for guiding the striking pin assembly; the guide assembly is disposed on the worktable and located directly above the striking pin assembly; and a moving assembly for impacting the guide assembly; the moving assembly is disposed on the worktable and located directly above the guide assembly.

[0004] In the aforementioned prior art, the device performs vertical pressure testing on the projection weld nut assembly through the impact pin assembly, but cannot perform lateral pressure testing. The force direction is singular, and the testing is incomplete, requiring improvement. Therefore, a rapid inspection fixture for the projection weld quality of nuts is proposed to address the above problems. Utility Model Content

[0005] The present invention aims to provide a tooling for rapid inspection of nut projection weld quality with more comprehensive detection data.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tooling for rapid inspection of the quality of nut projection welding, including a testing table, on which a projection welding nut assembly and a pressure plate are provided, the projection welding nut assembly is located in the middle of the pressure plate, a placement groove is provided on the testing table, the projection welding nut assembly is placed in the placement groove, and a plurality of testing components for inspecting the welding quality of the projection welding nut assembly are provided on the pressure plate.

[0007] The detection assembly includes a main hydraulic rod mounted on a pressure plate. The output end of the main hydraulic rod is provided with a lateral detection block. The lateral detection block has a sliding groove, and a limit block is slidably connected in the sliding groove. The sliding groove passes through the bottom of the lateral detection block. The top of the lateral detection block is provided with an inner hydraulic rod, and the end of the inner hydraulic rod is connected to the limit block.

[0008] The detection components are evenly distributed in a circle on the outside of the projection weld nut assembly, with four components in total.

[0009] The pressure plate has a detection port in the middle, the projection weld nut assembly is located inside the detection port, and the detection component is arranged around the detection port.

[0010] The projection weld nut assembly consists of a bottom plate and an upper nut.

[0011] The diameter of the detection port is smaller than the diameter of the plate but larger than the diameter of the nut.

[0012] The top of the testing platform is provided with a support, and the testing assembly also includes a top hydraulic rod set on the support and a vertical testing block set at the output end of the top hydraulic rod. The vertical testing block is located above the projection weld nut welding assembly.

[0013] An electric push rod is provided between the pressure plate and the testing table, and a support rod penetrating the testing table is provided at the bottom of the pressure plate.

[0014] The technical advantages of this invention are as follows: by utilizing the detection components, compared with the prior art, the force direction of the projection weld nut assembly is increased, improving the inspection effect. Furthermore, the vertical pressure inspection is added, resulting in richer inspection data and ensuring the accuracy of the inspection. Attached Figure Description

[0015] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of the structure of a tooling for rapid inspection of the weld quality of a nut projection according to the present invention; Figure 2 for Figure 1 A schematic diagram of the fit between the projection weld nut assembly and the placement groove in a tooling for rapid inspection of the projection weld quality of nuts. Figure 3 for Figure 1 A schematic diagram of the inspection components of a rapid inspection tooling for the quality of nut projection welding; Figure 4 for Figure 1 A schematic diagram of the lateral inspection block of a tooling for rapid inspection of the weld quality of a nut projection; Figure 5 for Figure 1 A schematic diagram of the pressure plate of a tooling for rapid inspection of the weld quality of a nut projection.

[0016] The markings in the diagram are as follows: 1. Inspection table; 2. Placement slot; 3. Projection weld nut assembly; 4. Pressure plate; 5. Inspection port; 6. Inspection component; 61. Main hydraulic rod; 62. Lateral inspection block; 63. Slide groove; 64. Limiting block; 65. Inner hydraulic rod; 66. Top hydraulic rod; 67. Vertical inspection block; 7. Electric push rod; 8. Support rod; 9. Bracket. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution, and to facilitate its implementation.

[0018] Please see Figure 1-5 A rapid inspection fixture for the quality of projection welds on nuts includes an inspection table 1, on which a projection weld nut assembly 3 and a pressure plate 4 are mounted. The projection weld nut assembly 3 is located in the middle of the pressure plate 4. A placement groove 2 is provided on the inspection table 1, and the projection weld nut assembly 3 is placed in the placement groove 2. The pressure plate 4 is provided with multiple inspection components for inspecting the welding quality of the projection weld nut assembly 3. Compared with the prior art, the inspection fixture increases the direction of force applied to the projection weld nut assembly 3, improves the inspection effect, and adds vertical pressure inspection, resulting in richer inspection data and ensuring the accuracy of the inspection.

[0019] The testing assembly includes a main hydraulic rod 61 mounted on a pressure plate 4. A lateral testing block 62 is located at the output end of the main hydraulic rod 61. A groove 63 is located within the lateral testing block 62, and a limit block 64 is slidably connected within the groove 63. The groove 63 extends through the bottom of the lateral testing block 62. An inner hydraulic rod 65 is located at the top of the lateral testing block 62, and the end of the inner hydraulic rod 65 is connected to the limit block 64. During testing, the projection weld nut assembly 3 is placed on the testing table 1. The main hydraulic rods 61 mounted on the pressure plate 4 push the lateral testing blocks 62 towards the projection weld nut assembly 3. One side of the lateral testing block 62 is grounded onto the nut of the projection weld nut assembly 3, while the other side is located on the plate of the projection weld nut assembly 3. At the outer edge of the material, the inner hydraulic rod 65 pushes the limiting block 64 down, the limiting block 64 extends out of the lateral detection block 62, and the limiting block 64 abuts against the plate of the projection weld nut assembly 3. Pressure is gradually applied by the two main hydraulic rods 61 on the opposite side, and the staggered pressure is fed back to the projection weld nut assembly 3. The shearing force causes the nut of the projection weld nut assembly 3 to separate from the plate, thereby achieving the peeling of the adhesive weld point between the projection weld nut assembly 3 and the plate. The welding strength of the projection weld nut assembly 3 is judged by the peeling state of the nut and the plate to determine whether it meets the process requirements. The cross-section of the limiting block 64 is cross-shaped, and the shape of the groove 63 is adapted to the shape of the limiting block 64. The cross-shaped limiting block 64 has higher structural strength and can reduce the risk of breakage.

[0020] The detection components are evenly distributed in a circle on the outer side of the projection weld nut assembly 3, with four components in total; this enables multi-directional detection, improves detection accuracy, and helps improve product quality.

[0021] The pressure plate 4 has a detection port 5 in the middle, and the projection weld nut assembly 3 is located inside the detection port 5. The detection components are arranged around the detection port 5; this facilitates detection and allows the pressure plate 4 to press down the projection weld nut assembly 3.

[0022] The projection weld nut assembly consists of a bottom plate and an upper nut.

[0023] The diameter of the detection port 5 is smaller than the diameter of the plate but larger than the diameter of the nut; so that when the pressure plate 4 descends, the pressure plate 4 can press on the plate without affecting the nut.

[0024] The top of the testing table 1 is provided with a support 9. The testing assembly also includes a top hydraulic rod 66 set on the support 9 and a vertical testing block 67 set at the output end of the top hydraulic rod 66. The vertical testing block 67 is located above the projection weld nut assembly 3. The top hydraulic rod 66 pushes the vertical testing block 67 down to press on the projection weld nut assembly 3, applying pressure to the projection weld nut assembly 3 for vertical inspection. The vertical testing block 67 is hemispherical, and the pressure can be applied evenly by the hemispherical vertical testing block 67 pressing against the nut.

[0025] An electric push rod 7 is provided between the pressure plate 4 and the testing table 1, and a support rod 8 is provided at the bottom of the pressure plate 4 that passes through the testing table 1. The electric push rod 7 is used to push the pressure plate 4 up and down. When it rises, it is convenient to place the projection welding nut assembly 3. When it falls, it can press down the plate. The support rod 8 is used to limit the pressure plate 4 to prevent it from tilting. At the same time, it can share the reaction force brought by the main hydraulic rod 61 to prevent the electric push rod 7 from breaking.

[0026] Working principle: During inspection, the projection weld nut assembly 3 is placed in the placement groove 2, with the nut located inside the inspection port 5. The main hydraulic rod 61 drives the lateral inspection block 62 to move, thereby pushing the projection weld nut assembly 3 to the center of the inspection port 5 and keeping it directly below the vertical inspection block 67. Then, the electric push rod 7 is operated to push the pressure plate 4 down to press on the surface of the plate. The top hydraulic rod 66 is activated to push the vertical inspection block 67 down, and the vertical inspection block 67 is used to apply pressure to the projection weld nut assembly 3 for vertical inspection. After the vertical inspection is completed, the main hydraulic rods 61 on the pressure plate 4 start to push the lateral detection blocks 62 towards the projection weld nut assembly 3. One side of the lateral detection block 62 is grounded on the nut of the projection weld nut assembly 3, while the other side of the lateral detection block 62 is located at the outer edge of the plate of the projection weld nut assembly 3. The inner hydraulic rod 65 pushes the limiting block 64 down, and the limiting block 64 extends out of the lateral detection block 62 and abuts against the plate of the projection weld nut assembly 3. The two main hydraulic rods 61 on the opposite side gradually apply pressure, and the staggered pressure is fed back to the projection weld nut assembly 3. The shearing force causes the nut of the projection weld nut assembly 3 to separate from the plate, thereby peeling the adhesive weld point of the projection weld nut assembly 3 from the plate. The welding strength of the projection weld nut assembly 3 is determined by the peeling state of the nut and the plate.

[0027] The technical advantages of this invention are as follows: Compared with the prior art, the detection component adds the force direction inspection of the projection weld nut assembly 3, improving the inspection effect. It also adds vertical pressure inspection in the vertical direction, making the inspection data richer and ensuring the accuracy of the inspection.

[0028] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A tooling for rapid inspection of the quality of nut projection welding, characterized in that: The system includes a testing platform (1), on which a projection weld nut assembly (3) and a pressure plate (4) are provided. The projection weld nut assembly (3) is located in the middle of the pressure plate (4). A placement groove (2) is provided on the testing platform (1), and the projection weld nut assembly (3) is placed in the placement groove (2). The pressure plate (4) is provided with multiple testing components for testing the welding quality of the projection weld nut assembly (3).

2. The tooling for rapid inspection of nut projection weld quality according to claim 1, characterized in that: The detection assembly includes a main hydraulic rod (61) mounted on a pressure plate (4). The output end of the main hydraulic rod (61) is provided with a lateral detection block (62). The lateral detection block (62) is provided with a sliding groove (63). A limit block (64) is slidably connected in the sliding groove (63). The sliding groove (63) passes through the bottom of the lateral detection block (62). The top of the lateral detection block (62) is provided with an inner hydraulic rod (65). The end of the inner hydraulic rod (65) is connected to the limit block (64).

3. A tooling for rapid inspection of nut projection weld quality according to claim 1 or 2, characterized in that: The detection components are evenly distributed in a circle on the outside of the projection weld nut assembly (3), with four components in total.

4. The tooling for rapid inspection of nut projection weld quality according to claim 2, characterized in that: The pressure plate (4) has a detection port (5) in the middle, the projection weld nut assembly (3) is located inside the detection port (5), and the detection component is arranged around the detection port (5).

5. The tooling for rapid inspection of nut projection weld quality according to claim 4, characterized in that: The projection weld nut assembly (3) is divided into a bottom plate and an upper nut.

6. The tooling for rapid inspection of nut projection weld quality according to claim 5, characterized in that: The diameter of the detection port (5) is smaller than the diameter of the plate and larger than the diameter of the nut.

7. The tooling for rapid inspection of nut projection weld quality according to claim 1, characterized in that: The testing platform (1) is provided with a support (9) on top. The testing assembly also includes a top hydraulic rod (66) set on the support (9) and a vertical testing block (67) set at the output end of the top hydraulic rod (66). The vertical testing block (67) is located above the projection weld nut welding assembly (3).

8. The tooling for rapid inspection of nut projection weld quality according to claim 1, characterized in that: An electric push rod (7) is provided between the pressure plate (4) and the testing table (1), and a support rod (8) that penetrates the testing table (1) is provided at the bottom of the pressure plate (4).

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