Plastic welding support structure, automobile interior and exterior trim assembly and automobile

Abstract

The utility model relates to the technical field of automobile parts, in particular to a plastic welding support structure, an automobile interior and exterior trim assembly and an automobile. The plastic welding support structure comprises a support body, a plurality of welding spot grooves are formed in the support body, and the welding spot grooves are formed in the support body at intervals. Wherein the welding spot groove is used for welding the support body to the automobile ornament through laser, and the thickness T of the support body at the welding spot groove meets the condition that T is larger than or equal to 0.2 mm and smaller than or equal to 0.5 mm. According to the plastic welding support structure, the automobile interior and exterior trim assembly and the automobile, the problem that when an existing plastic support and automobile interior and exterior trim are subjected to ultrasonic welding, the thickness of interior and exterior trim needs to be increased is solved.

Description

Technical Field

[0001] The present application relates to the technical field of automotive parts, and particularly to a plastic welding bracket structure, an interior and exterior trim assembly of an automobile, and an automobile. Background Art

[0002] Automobiles are often equipped with interior and exterior trims that play a role in decoration and protection, and the interior and exterior trims are usually injection-molded. At present, due to injection molding defects and product configuration requirements of the interior and exterior trims, a large number of plastic brackets need to be welded. The welding of plastic brackets needs to meet both the welding strength requirements and the appearance quality requirements of the interior and exterior trims.

[0003] In the related art, the welding between the plastic bracket and the interior and exterior trims is generally mainly ultrasonic welding. During the welding process, the ultrasonic welding head continuously performs linear vibration, which will cause a certain mechanical energy impact on the welding area of the interior and exterior trims, resulting in quality defects such as deformation and light and shadow on the surface of the interior and exterior trims. In order to eliminate the influence of mechanical energy on the product surface, the thickness of the interior and exterior trims at the welding position needs to be increased, which can effectively reduce the appearance quality defects caused by welding, but this increases the processing difficulty and cost of the interior and exterior trims. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a plastic welding bracket structure, an interior and exterior trim assembly of an automobile, and an automobile to solve the problem that the thickness of the interior and exterior trims needs to be increased when the existing plastic brackets and the interior and exterior trims of an automobile are ultrasonically welded.

[0005] The present application provides a plastic welding bracket structure, which includes a bracket body. A plurality of welding point grooves are formed in the bracket body, and the plurality of welding point grooves are arranged on the bracket body at intervals; wherein, the welding point grooves are used to laser-weld the bracket body to an automotive trim, and the thickness T of the bracket body at the welding point grooves satisfies 0.2 mm ≤ T ≤ 0.5 mm.

[0006] In one embodiment, the area S of the welding point groove satisfies S ≤ 30 mm 2 .

[0007] In one embodiment, the distance L between adjacent welding point grooves satisfies L ≥ 3 mm.

[0008] In one embodiment, the bracket body is configured as a non-transparent part.

[0009] In one embodiment, the cross-sectional shape of the welding point groove is circular.

[0010] In one embodiment, the plastic welding bracket structure further includes a connecting portion, and the connecting portion is connected to the bracket body.

[0011] The present application also provides an interior and exterior trim assembly for an automobile. The interior and exterior trim assembly for an automobile includes a trim piece and the plastic welding bracket structure described in any one of the above embodiments, and the bracket body is laser welded to the trim piece.

[0012] In one embodiment, the bracket body is closely attached to the trim piece.

[0013] In one embodiment, the area on the trim piece that fits with the bracket body is defined as the fitting area, the area in the fitting area corresponding to the solder joint groove is defined as the welding cooperation point, and the thickness at the welding cooperation point is equal to the thickness at other positions on the fitting area.

[0014] The present application also provides an automobile, which includes the above-mentioned interior and exterior trim assembly for an automobile.

[0015] Compared with the prior art, the plastic welding bracket structure, the interior and exterior trim assembly for an automobile, and the automobile provided by the present application, compared with the traditional ultrasonic welding process, by adopting laser welding and providing corresponding solder joint grooves on the bracket body, the present application can utilize the cooperation between the solder joint grooves and the laser to melt the bracket body at the solder joint grooves, thereby conducting heat to the automobile trim piece and forming a molten pool. Moreover, the thickness setting at the solder joint grooves can ensure the reliability of heat transfer, avoiding the situation that heat cannot be effectively conducted to the trim piece during laser irradiation, resulting in welding failure. In this way, after the trim piece is welded to the bracket body, both the connection strength can be ensured, and at the same time, quality defects on the outer surface of the trim piece can be prevented, greatly improving the reliability of the product, and there is no need to locally thicken the trim piece, reducing the processing difficulty and processing cost of the trim piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of a plastic welding bracket structure according to an embodiment provided by the present application;

[0018] Figure 2 It is a cross-sectional view of the cooperation between the bracket body and the trim piece according to an embodiment provided by the present application.

[0019] The meanings of the symbols in the drawings are as follows:

[0020] 100, plastic welding bracket structure; 10, bracket body; 101, solder joint groove; 20, connecting portion; 200, trim piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0022] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present application are only for illustrative purposes and do not represent the only implementation manner.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0024] In the present application, unless otherwise clearly specified and limited, the first feature can be in direct contact with the second feature "above" or "below" the second feature, or the first feature and the second feature can be in indirect contact through an intermediate medium. Moreover, the first feature can be directly above or obliquely above the second feature "above", "over", and "on" the second feature, or it only means that the first feature has a higher horizontal height than the second feature. The first feature can be directly below or obliquely below the second feature "below", "under", and "beneath" the second feature, or it only means that the first feature has a lower horizontal height than the second feature.

[0025] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more of the related listed items.

[0026] Automobiles are often equipped with interior and exterior decorations that serve both decorative and protective purposes. The interior and exterior decorations are usually injection-molded. Currently, due to injection molding defects and product configuration requirements, a large number of plastic brackets need to be welded. The welding of plastic brackets needs to meet both the welding strength requirements and the appearance quality requirements of the interior and exterior decorations.

[0027] In related technologies, the welding between plastic brackets and interior and exterior decorations generally mainly uses ultrasonic welding. During the welding process, the ultrasonic welding head continuously performs linear vibration, which will cause a certain mechanical energy impact on the welding area of the interior and exterior decorations, resulting in quality defects such as deformation and light and shadow on the surface of the interior and exterior decorations. To eliminate the influence of mechanical energy on the product surface, the thickness of the interior and exterior decorations at the welding position needs to be increased, which can effectively reduce the appearance quality defects caused by welding. However, this increases the processing difficulty and cost of the interior and exterior decorations.

[0028] Please refer to Figure 1 and Figure 2 To solve the problem that the thickness of the interior and exterior decorations needs to be increased during the ultrasonic welding of existing plastic brackets and automobile interior and exterior decorations, this application provides a plastic welding bracket structure 100. The plastic welding bracket structure 100 includes a bracket body 10, and a plurality of solder joint grooves 101 are formed on the bracket body 10. The plurality of solder joint grooves 101 are spaced on the bracket body 10. Among them, the solder joint grooves 101 are used to laser-weld the bracket body 10 to the automobile decoration 200. And the thickness T of the bracket body 10 at the solder joint grooves 101 satisfies 0.2mm ≤ T ≤ 0.5mm.

[0029] It can be understood that compared with the traditional ultrasonic welding process, this application uses laser welding and forms corresponding solder joint grooves 101 on the bracket body 10. It can utilize the cooperation between the solder joint grooves 101 and the laser to melt the bracket body 10 at the solder joint grooves 101, thereby conducting heat to the automobile decoration 200 and forming a molten pool. And the thickness setting at the solder joint grooves 101 can ensure the reliability of heat transfer, avoiding the situation where heat cannot be effectively conducted to the decoration 200 during laser irradiation, resulting in welding failure. In this way, after the decoration 200 is welded to the bracket body 10, it can not only ensure the connection strength, but also prevent quality defects from occurring on the outer surface of the decoration 200, greatly improving the reliability of the product, and there is no need to locally thicken the decoration 200, reducing the processing difficulty and processing cost of the decoration 200.

[0030] Specifically, if the thickness T of the bracket body 10 at the solder joint groove 101 is greater than 0.5 mm, the thickness at the solder joint groove 101 is relatively thick, and the heat generated during laser irradiation cannot be effectively conducted to the decorative part 200, which is likely to cause welding failure. If the thickness T of the bracket body 10 at the solder joint groove 101 is less than 0.2 mm, the thickness at the solder joint groove 101 is relatively thin, and the bracket body 10 is likely to be over-melted during laser irradiation, causing the bracket body 10 to break, which is also likely to cause welding failure.

[0031] Optionally, the thickness T of the bracket body 10 at the solder joint groove 101 can be set to 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc., which are not listed one by one here.

[0032] It should be noted that the laser used in this application can be semiconductor laser, galvanometer laser, continuous wave RF laser, etc. Among them, if a semiconductor laser is used, the wavelength of the semiconductor laser can be set to 980 nm, and the core diameter is set to be greater than or equal to 200 nm. If a galvanometer laser is used, the power of the galvanometer laser can be 90 W - 120 W, the speed is 100 mm / s - 200 mm / s, and the trajectory should be 5 - 10 cycles. If a continuous wave RF laser is used, the power of the continuous wave RF laser can be 20 W - 40 W. Among them, to prevent the material of the bracket body 10 from being over-melted due to too long laser irradiation time, the laser irradiation time is usually set to 0.5 s - 1.5 s.

[0033] Furthermore, a special optical glass should be used on the corresponding welding device to ensure that the laser can be normally irradiated to the solder joint groove 101 on the bracket body 10. In addition, after the laser stops irradiating, pressure should be maintained for 1 s - 2 s to solidify the welding position, thereby ensuring the firmness of the welding.

[0034] To reduce the reduction of the structural strength of the bracket body 10 caused by the opening of the solder joint groove 101, in one embodiment, the area S of the solder joint groove 101 satisfies S ≤ 30 mm 2 . By controlling the size of the solder joint groove 101, the influence on the structural strength of the bracket body 10 can be reduced. Among them, the area of the solder joint groove 101 can be set to 10 mm 2 , 15 mm 2 , 20 mm 2 , 25 mm 2 or 30 mm 2 etc., and can be reasonably set according to actual needs.

[0035] Furthermore, in one embodiment, the distance L between adjacent solder joint grooves 101 satisfies L ≥ 3 mm. In this way, the influence of the solder joint groove 101 on the structural strength of the bracket body 10 can be further reduced.

[0036] Exemplarily, the value of the spacing L between adjacent solder joint grooves 101 can be set to 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc., which are not listed one by one here.

[0037] In one embodiment, as Figure 1 shown, the cross-sectional shape of the solder joint groove 101 is circular to facilitate cooperation with the laser beam and improve the utilization rate of the solder joint groove 101.

[0038] In one embodiment, as Figure 1 shown, the plastic welding bracket structure 100 further includes a connecting portion 20, and the connecting portion 20 is connected to the bracket body 10. Among them, the connecting portion 20 mainly plays a connecting role and can achieve the connection effect between the decorative part 200 and other components on the vehicle body.

[0039] In the traditional plastic laser welding process, it is often necessary to perform light-transmitting modification at the welding joint of plastic products, that is, the light transmittance of the plastic is required to be at least 30% to ensure the transmittance of the laser. This not only increases the cost, but also when the light transmittance is relatively high, the welding molten pool often forms on the decorative part 200, resulting in appearance quality defects such as stress marks after welding and cooling.

[0040] In this application, since the laser irradiation melts the solder joint grooves 101 on the bracket body 10, the bracket body 10 can be configured as an opaque part to prevent laser transmission and form welding only through heat transfer. In this way, the probability of forming appearance quality defects on the decorative part 200 is effectively reduced.

[0041] This application also provides an interior and exterior trim assembly for an automobile. The interior and exterior trim assembly for an automobile includes a decorative part 200 and the plastic welding bracket structure 100 described in any one of the above embodiments, and the bracket body 10 is laser welded to the decorative part 200.

[0042] In one embodiment, the bracket body 10 is closely attached to the decorative part 200 to ensure the reliability of the welding between the bracket body 10 and the decorative part 200. Among them, when the bracket body 10 and the decorative part 200 are welded, a fixture or the like can be used for clamping, and the pressure applied by the fixture ensures close attachment.

[0043] Further, define the area on the decorative part 200 that fits with the bracket body 10 as the fitting area, and the area corresponding to the solder joint groove 101 in the fitting area as the welding cooperation point. The thickness at the welding cooperation point is equal to the thickness at other positions on the fitting area. That is, the decorative part 200 of this application does not need to adopt the method of local thickening for welding, thereby reducing the processing difficulty and processing cost of the decorative part 200.

[0044] For example, the thickness of the trim piece 200 is usually 2.5 mm. In the traditional welding process, the thickness of the welding part of the trim piece 200 needs to be increased to 3.2 mm to reduce the probability of welding appearance defects. However, in this application, the thickness of the trim piece 200 can be maintained at 2.5 mm, the overall structure is simpler, and the cost is lower.

[0045] This application also provides a vehicle, which includes the above-mentioned interior and exterior trim assembly of the vehicle.

[0046] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0047] The above-described embodiments only represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the patent protection scope of this application should be subject to the appended claims.

Claims

1. A plastic welding bracket structure, characterized in that: It comprises a bracket body (10), the bracket body (10) is provided with a plurality of welding point grooves (101), and the plurality of welding point grooves (101) are arranged at intervals on the bracket body (10); The welding point groove (101) is used for laser welding the bracket body (10) to the automobile trim (200), and the thickness T of the bracket body (10) at the welding point groove (101) satisfies 0.2 mm ≤ T ≤ 0.5 mm.

2. The plastic welding bracket structure according to claim 1, characterized in that: The area S of the solder joint groove (101) satisfies: S≤30mm 2 .

3. The plastic welding bracket structure according to claim 1, characterized in that: The spacing L between adjacent welding spot grooves (101) satisfies L≥3mm.

4. The plastic welding bracket structure according to claim 1, characterized in that: The support body (10) is configured as a non-transparent part.

5. The plastic welding bracket structure according to claim 1, characterized in that: The cross-sectional shape of the welding spot groove (101) is circular.

6. The plastic welding bracket structure according to claim 1, characterized in that: The plastic welding bracket structure also includes a connecting portion (20), wherein the connecting portion (20) is connected to the bracket body (10).

7. An automobile interior and exterior decoration assembly, characterized in that: It comprises a decorative part (200) and a plastic welding bracket structure according to any one of claims 1 to 6, wherein the bracket body (10) is laser welded to the decorative part (200).

8. The automobile interior and exterior decoration assembly according to claim 7, characterized in that: The support body (10) and the decorative component (200) are tightly fitted.

9. The automobile interior and exterior decoration assembly according to claim 8, characterized in that: The area on the decorative part (200) that is bonded to the bracket body (10) is defined as the bonding area, the area in the bonding area corresponding to the welding point groove (101) is defined as the welding matching point, and the thickness at the welding matching point is equal to the thickness at other positions on the bonding area.

10. An automobile, characterized in that: It includes the automobile interior and exterior decoration assembly as described in claim 7.

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