Automobile tail trim panel suitable for ultrasonic puncture welding

Abstract

The utility model relates to the technical field of automobile parts, in particular to an automobile tail trim panel suitable for ultrasonic puncture welding, which comprises an upper body and a lower body, the lower body is provided with a plurality of welding grooves arranged along the edge of the lower body, and at least one welding groove forms a welding spot area on the lower body. At least one protruding block protruding along the surface of the lower body is arranged at the adjacent position of each welding spot area. When the top of the welding groove is attached to the lower surface of the upper body, the top of the protruding block is attached to the lower surface of the upper body. After the upper body and the lower body are assembled, the top of the welding groove and the top of the protruding block are attached to the lower surface of the upper body, the protruding block plays a pre-pressing role, the friction force around the welding groove is increased, the stability of the upper body and the lower body in the welding groove position is guaranteed, and the accuracy rate of the welding position is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an automobile tail trim plate suitable for ultrasonic puncture welding. Background Art

[0002] Ultrasonic puncture welding is a welding method that uses ultrasonic technology. In this method, the welding head vibrates the molecular level of the welding material through ultrasonic vibration, generating friction heat, thereby achieving welding. Ultrasonic puncture welding has the advantages of fast welding speed, high welding quality, and low requirements for welding materials. It is suitable for welding materials such as metals, plastics, and ceramics. This method is widely used in industries such as electronics, automobiles, and medical devices.

[0003] The rear trim of a car is a decorative part installed at the rear of the car, usually under the rear bumper. The rear trim can beautify the appearance of the car body and enhance the overall atmosphere of the vehicle. It is usually made of plastic, aluminum alloy and other materials, and has the characteristics of corrosion resistance, wear resistance and high temperature resistance. Ultrasonic puncture welding can achieve fast and precise welding, while reducing heat effects and avoiding material deformation or burning. This is very important for high-precision and high-quality decorative parts such as the rear trim of a car. The use of ultrasonic puncture welding technology can improve the production efficiency and quality of the rear trim of a car, while reducing production costs.

[0004] CN210363655U discloses an upper trim panel assembly for a front door of an automobile, comprising an upper trim panel frame, a front door water-cut bracket, an upper trim panel skin, a front door upper decorative strip and a lower trim panel, wherein the front door water-cut bracket is transversely extended and fixed on the upper part of the upper trim panel frame, vacuum adsorption holes are evenly spaced on the upper trim panel skin, the upper trim panel frame and the front door water-cut bracket are releasably located in the male mold adsorption tooling, the vacuum adsorption holes are releasably connected to the male mold adsorption tooling, the upper trim panel skin is transversely extended and adsorbed and connected to the lower part of the upper trim panel frame through the vacuum adsorption holes, the front door upper decorative strip is transversely extended and fixed on the middle part of the upper trim panel frame, the lower trim panel is fixed on the rear side of the upper trim panel frame, and the upper trim panel skin is located on the lower trim panel.

[0005] The above technical solution adopts a positive mold vacuum forming process, which is lower in cost than a negative mold vacuum forming process, and is more efficient than manual wrapping. Moreover, the above technical solution states in paragraph 0033 of the specification that "the front door water-cut bracket 2 is provided with face-to-face welding points 11 at equal intervals in the horizontal direction, and the front door water-cut bracket 2 is welded and fixed to the upper part of the upper decorative panel frame 1 by extending the face-to-face welding points 11 in the horizontal direction", so the above technical solution discloses the setting of welding points in automobile parts, and combined with the drawings of the above technical solution, it discloses welding points of rectangular structure, but the above technical solution cannot guarantee the stability of its welding points when in contact with the upper decorative panel frame, and defects of welding gap or welding dislocation may occur after welding, which reduces the subsequent assembly matching degree and increases the difficulty of assembly. Utility Model Content

[0006] The utility model aims to solve the above-mentioned problems and provides a car tail trim panel suitable for ultrasonic puncture welding. The car tail trim panel is provided with a plurality of welding grooves arranged along the edge of the lower body on the lower body, and at least one welding groove forms a welding point area on the lower body, and at least one protruding block protruding along the surface of the lower body is provided at an adjacent position of each welding point area. After the upper body and the lower body are assembled, the top of the welding groove and the top of the protruding block are both in contact with the lower surface of the upper body, and the protruding block plays a pre-pressing role, thereby increasing the friction around the welding groove, ensuring the stability of the upper body and the lower body in the welding groove position, and improving the accuracy of the welding position.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A car rear trim suitable for ultrasonic puncture welding comprises an upper body and a lower body, wherein the lower body is provided with a plurality of welding grooves arranged along the edge of the lower body, and at least one welding groove forms a welding point area on the lower body, and at least one protruding block protruding along the surface of the lower body is provided at an adjacent position of each welding point area; when the top of the welding groove is in contact with the lower surface of the upper body, the top of the protruding block is in contact with the lower surface of the upper body.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model has a plurality of welding grooves arranged along the edge of the lower body on the lower body, and at least one welding groove forms a welding point area on the lower body, and at least one protrusion protruding along the surface of the lower body is provided at an adjacent position of each welding point area. After the upper body and the lower body are assembled, the top of the welding groove and the top of the protrusion are both in contact with the lower surface of the upper body, and the protrusion plays a pre-pressing role, thereby increasing the friction around the welding groove, ensuring the stability of the upper body and the lower body at the welding groove position, and improving the accuracy of the welding position. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a three-dimensional view of the automobile rear trim panel of Example 1;

[0012] Figure 2 is a three-dimensional view of the upper body of the automobile rear trim panel of Example 1;

[0013] Figure 3 It is one of the three-dimensional views of the lower body of the automobile tail panel of Example 1;

[0014] Figure 4 This is a second perspective view of the lower body of the automobile rear trim panel of Example 1;

[0015] Figure 5 is a top view of the lower body of the automobile rear trim panel of Example 1;

[0016] Figure 6 yes Figure 3 A partial enlarged view of point B;

[0017] Figure 7 It is a schematic diagram of the contact between the welding groove of the automobile rear trim panel and the upper body in Example 1. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example 1

[0020] refer to Figures 1 to 7 A car tail trim suitable for ultrasonic puncture welding comprises an upper body 1 and a lower body 2, wherein the lower body 2 is provided with a plurality of welding grooves 3 arranged along the edge of the lower body 2, and at least one welding groove 3 forms a welding point area A on the lower body 2, and at least one protrusion 4 protruding along the surface of the lower body 2 is provided at an adjacent position of each welding point area A; when the top of the welding groove 3 is in contact with the lower surface of the upper body 1, the top of the protrusion 4 is in contact with the lower surface of the upper body 1.

[0021] In this design, the operator first assembles the upper body 1 and the lower body 2 of the automobile rear trim. After the assembly is completed, the tops of the multiple welding grooves 3 on the lower body 2 are in contact with the lower surface of the upper body 1, and the tops of the protrusions 4 are also in contact with the lower surface of the upper body 1, and ultrasonic puncture welding can be performed. Because the use of one welding groove 3 in the special areas of the lower body 2 and the upper body 1 cannot ensure the stability of welding, at least one welding groove 3 forms a welding point area A, and during welding, it is necessary to ensure that the welding grooves 3 in each welding point area A complete the welding work.

[0022] In this way, the bump 4 plays a role of pre-compression, increases the friction around the welding groove 3, ensures the stability of the position of the upper body 1 and the lower body 2 in the welding groove 3, and improves the accuracy of the welding position.

[0023] In this embodiment, the lower body 2 is provided with a first welding surface 21 and a second welding surface 22 matching the welding position of the upper body 1 , and the welding point area A and the bump 4 are both located on the first welding surface 21 and the second welding surface 22 .

[0024] Even if the lower body 2 and the upper body 1 are assembled, the assembly method cannot guarantee the stability of the connection between the upper body 1 and the lower body 2. Therefore, a first welding surface 21 and a second welding surface 22 are set on the lower body 2. Through the two welding surfaces, the stability of the connection between the lower body 2 and the upper body 1 is guaranteed by assembly and welding.

[0025] Preferably, the first welding surface 21 is provided with a plurality of symmetrically arranged protrusions 211 and first concave portions 212, the welding point areas A are respectively located on the protrusions 211 and the first concave portions 212, and the bumps 4 and the welding point areas A are arranged on the protrusions 211 and the first concave portions 212 in a one-to-one correspondence.

[0026] Specifically, according to the shape of the lower body 2, in order to match the external parts, the lower body 2 is usually uneven, so there will be multiple symmetrically arranged protrusions 211 and first recesses 212 on its first welding surface 21. Precisely because there are multiple protrusions 211 and first recesses 212, the bumps 4 and the welding point areas A are arranged on the protrusions 211 and the first recesses 212 in a one-to-one correspondence, so as to ensure that there are bumps 4 near each welding point area A.

[0027] Furthermore, the height of the solder groove 3 and the bump 4 on the first recess 212 is greater than the height of the solder groove 3 and the bump 4 on the convex portion 211, and the highest point of the solder groove 3 and the bump 4 on the first recess 212 and the highest point of the solder groove 3 and the bump 4 on the convex portion 211 are located on the same horizontal plane.

[0028] In actual use, because the shape of the lower body 2 is uneven, but the fitting surface between the upper body 1 and the lower body 2 is flat, in order to ensure that the welding groove 3 on the convex part 211 and the welding groove 3 on the first concave part 212 can both contact with the upper body 1, the height of the welding groove 3 and the protrusion 4 on the first concave part 212 is greater than the height of the welding groove 3 and the protrusion 4 on the convex part 211, so that the highest point of the welding groove 3 and the protrusion 4 on the first concave part 212 and the highest point of the welding groove 3 and the protrusion 4 on the convex part 211 are on the same horizontal plane.

[0029] Preferably, the welding groove 3 is concavely formed from the bottom of the first welding surface 21 to the top of the first welding surface 21, and the concave depth of the welding groove 3 located on the first concave portion 212 is greater than the concave depth of the welding groove 3 located on the convex portion 211, and a connecting column 2121 is also provided on the first concave portion 212, and the protrusion 4 on the first concave portion 212 is located on the connecting column 2121.

[0030] The welding groove 3 is recessed from the bottom of the first welding surface 21 to the top of the first welding surface 21, so that the weight of the lower body 2 can be reduced. In order to ensure that the highest point of the welding groove 3 located on the first recessed portion 212 and the highest point of the welding groove 3 located on the convex portion 211 are located on the same horizontal plane, the recessed depth of the welding groove 3 located on the first recessed portion 212 is greater than the recessed depth of the welding groove 3 located on the convex portion 211; and by providing a connecting column 2121 on the first recessed portion 212 and providing the bump 4 on the connecting column 2121, the height of the bump 4 can also be increased, so that the highest point of the bump 4 located on the first recessed portion 212 and the highest point of the bump 4 located on the convex portion 211 are located on the same horizontal plane.

[0031] In this embodiment, the thickness of the top of the welding groove 3 is less than the thickness of the first welding surface 21. For thin workpieces, ultrasonic puncture welding can quickly generate friction heat and achieve efficient welding. For thicker workpieces, higher ultrasonic frequencies or greater power may be required to achieve effective welding. Through such a design, the welding effect of ultrasonic puncture welding can be guaranteed.

[0032] More preferably, the connecting column 2121 is recessed from the bottom of the first welding surface 21 to the top of the first welding surface 21. Of course, the connecting column 2121 can also be directly formed on the upper surface of the first welding surface 21, but this will increase the weight of the lower body 2, so the connecting column 2121 is recessed from the bottom of the first welding surface 21 to the top of the first welding surface 21, so that the connecting column 2121 is an inner hollow structure with an open lower surface, and a bulge is formed in a way to increase the minimum weight.

[0033] In this embodiment, a symmetrically arranged second recess 221 is provided on the second welding surface 22, and the welding point area A adjacent to the second recess 221 includes a plurality of welding grooves 3, and the plurality of welding grooves 3 are arranged around the second recess 221, and on the second welding surface 22, the protrusion 4 is located between two adjacent welding point areas A.

[0034] In practical applications, in order to match the external parts, the lower body 2 is provided with a second recess 221 on the second welding surface 22. The difference between the second recess 221 and the first recess 212 is that the recessed portion of the first recess 212 is the width of the entire first welding surface 21; the recessed portion of the second recess 221 is only a part of the width of the second welding surface 22. Therefore, in order to ensure the stability of welding in the area around the second recess 221, the welding point area A adjacent to the second recess 221 needs to include a plurality of welding grooves 3 so that the welding grooves 3 can be arranged around the second recess 221. However, because a plurality of welding grooves 3 are provided and the position of the second welding surface 22 is limited, it is not possible to provide a convex block 4 corresponding to the welding groove 3. Therefore, on the second welding surface 22, the convex block 4 is located between two adjacent welding point areas A, which can also assist each welding point area A, and there will be two convex blocks 4 at the adjacent positions of the welding point area A in the central area to assist, which can also ensure the stability during welding.

[0035] Preferably, the protrusion 4 is a cylindrical structure or an annular structure, and the protrusion 4 is integrally formed with the lower body 2 .

[0036] Simply put, compared with other shapes, cylindrical structures or annular structures can disperse and withstand pressure more evenly when subjected to external forces; and in this embodiment, annular structures are preferably used because we find that the annular structures can already achieve the desired effect. If a cylindrical structure is used, the weight of the lower body 2 will increase and the mold processing cost will also increase.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements or modifications without departing from the principle of the present invention. These improvements or modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A car tail trim suitable for ultrasonic puncture welding, comprising an upper body and a lower body, characterized in that: The lower body is provided with a plurality of welding grooves arranged along the edge of the lower body, and at least one welding groove forms a welding point area on the lower body, and at least one protruding block protruding along the surface of the lower body is provided at an adjacent position of each welding point area; when the top of the welding groove is in contact with the lower surface of the upper body, the top of the protruding block is in contact with the lower surface of the upper body.

2. The automobile rear trim according to claim 1, characterized in that: The lower body is provided with a first welding surface and a second welding surface which match the welding position of the upper body, and the welding point area and the convex block are both located on the first welding surface and the second welding surface.

3. The automobile rear trim according to claim 2, characterized in that: The first welding surface is provided with a plurality of symmetrically arranged protrusions and first concave portions, the soldering point regions are respectively located on the protrusions and the first concave portions, and the protrusions and the soldering point regions are arranged on the protrusions and the first concave portions in a one-to-one correspondence.

4. The automobile rear trim according to claim 3, characterized in that: The height of the solder groove and the bump on the first concave portion is greater than the height of the solder groove and the bump on the convex portion, and the highest point of the solder groove and the bump on the first concave portion and the highest point of the solder groove and the bump on the convex portion are located on the same horizontal plane.

5. The automobile rear trim according to claim 4, characterized in that: The welding groove is concavely formed from the bottom of the first welding surface to the top of the first welding surface, and the concave depth of the welding groove on the first concave part is greater than the concave depth of the welding groove on the convex part. A connecting column is also provided on the first concave part, and the convex block on the first concave part is located on the connecting column.

6. The automobile rear trim according to claim 5, characterized in that: The thickness of the top of the welding groove is smaller than the thickness of the first welding surface.

7. The automobile rear trim according to claim 5, characterized in that: The connecting column is concavely formed from the bottom of the first welding surface to the top of the first welding surface.

8. The automobile rear trim according to claim 2, characterized in that: The second welding surface is provided with symmetrically arranged second recesses, the welding spot area adjacent to the second recesses includes a plurality of welding grooves, and the plurality of welding grooves are arranged around the second recesses, and on the second welding surface, the protrusion is located between two adjacent welding spot areas.

9. The automobile rear trim according to claim 1, characterized in that: The protrusion is a cylindrical structure or an annular structure, and the protrusion is integrally formed with the lower body.

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