Laser welding structure and vehicle lamp

Abstract

The utility model relates to the technical field of laser welding, and specifically discloses a laser welding structure and a car lamp, the laser welding structure comprises a first component, a second component, a surface contact welding part and a overflow groove, the first component and the second component are respectively equipped with first connecting part and second connecting part along the vertical direction arrangement, and the first connecting part and the second connecting part form the surface contact welding part through opposite side face, realize laser welding connection, the overflow groove is located above the surface contact welding part and is used for accommodating welding molten overflow, the first component adopts the light -transmitting material, the second component adopts the light -absorbing material, the second connecting part is equipped with the recess, and the side wall is the second welding inclined plane, and is pasted with the first welding inclined plane of the first connecting part, and the structure reduces the horizontal space occupation through the vertical butt welding, is suitable for the compact space such as car lamp, and the overflow groove effectively collects the molten material, ensures the sealing property and waterproof performance, avoids the interference headlighting area.

Description

Technical Field

[0001] This utility model relates to the technical field of laser welding, and specifically to a laser welding structure and a vehicle lamp. Background Technology

[0002] Automotive lights need to be sealed and waterproofed by welding to ensure their service life. However, as the functions of automotive lights increase and their internal structures become more complex, the physical space available for welding becomes extremely limited. Traditional laser welding structures require a large dimensional space to form overflow channels, which severely limits their application in the front lighting area of ​​automotive lights or complex shaped parts.

[0003] In existing technologies, laser welding structures are generally divided into two types, one of which is shown in the attached diagram of the specification. Figure 1 As shown, it includes a first component 100 and a second component 200, which uses a light-absorbing material and a light-transmitting material. A welded rib is designed on the light-absorbing material for fusion sealing. This serves two purposes: firstly, to provide a place for the molten material to overflow and form a barrier; and secondly, to improve weather resistance and stability, preventing seal failure due to contact with external media. However, according to this design, the flange size must be at least 5.5mm. Secondly, as shown in the attached diagram of the specification... Figure 2 As shown, it also includes a first component 100 and a second component 200, which also use a conventional material and a light-transmitting material. It cuts off half of the overflow groove on the side, but its flange size still needs to be kept above 4mm, and it cannot prevent overflow. Utility Model Content

[0004] This utility model was developed in consideration of the aforementioned problems. The purpose of this utility model is to provide a laser welding structure and a vehicle light, which has small space requirements and good anti-overflow effect.

[0005] To achieve the above objectives, this utility model provides a laser welding structure, comprising:

[0006] The first component has a first connecting part arranged vertically thereon;

[0007] The second component is disposed adjacent to the first component, and the second component is provided with a second connecting part arranged in a vertical direction, the second connecting part corresponding to the first connecting part;

[0008] A surface-contact welding portion is formed between the opposite side surfaces of the first connecting portion and the second connecting portion;

[0009] An overflow groove, located above the surface-contact welding part, is used to collect molten overflow generated during laser welding.

[0010] The first component and the second component are connected by laser welding through the surface contact welding part.

[0011] According to the laser welding structure described above, the first component is made of a light-transmitting material, and the second component is made of a light-absorbing material.

[0012] According to the laser welding structure described above, a first welding slope is provided on one side of the first connecting part, and a second welding slope is provided on one side of the second connecting part. The first welding slope can fit into the second welding slope to form the surface contact welding part.

[0013] According to the laser welding structure described above, the second connecting part is provided with a groove, and one side wall of the groove is provided as the second welding slope. The end of the first connecting part can be inserted into the groove so that the first welding slope and the second welding slope fit together.

[0014] According to the laser welding structure described above, the side of the groove away from the second welding slope is set as a vertical plane, the end of the first connecting part is fitted with the bottom of the groove, and the side of the first connecting part away from the second connecting part is fitted with the vertical plane.

[0015] According to the laser welding structure described above, the first component is located above the second component, and the second connecting part extends upward on the side away from the second welding slope to form a retaining wall, and the retaining wall and the first connecting part together form the overflow trough.

[0016] According to the laser welding structure described above, the inclination angle of the second welding bevel is between 145° and 155°.

[0017] According to the laser welding structure described above, the inclination angle of the second welding bevel is 150°.

[0018] According to the laser welding structure described above, the thickness of the surface contact welding part is 0.5 mm.

[0019] A vehicle light, comprising:

[0020] The laser-welded structure as described above.

[0021] This utility model has the following beneficial effects:

[0022] 1. The first connecting part and the second connecting part are vertically welded together, which significantly reduces the horizontal space occupied and is suitable for extremely compact spaces;

[0023] 2. The end of the first connecting part is fitted with the bottom of the groove, and one side of it is fitted with the vertical plane of the groove, which can play a sealing role. The molten material produced by laser welding can only enter the overflow tank. The overflow tank can effectively collect the molten material, form a sealing structure, and ensure waterproof sealing performance.

[0024] 3. The overflow trough is located above the surface contact welding part, which can avoid interference with the front lighting area. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the existing technology's solution one;

[0026] Figure 2 This is a schematic diagram of the overall structure of the existing technology's second solution;

[0027] Figure 3 This is a schematic diagram of the overall structure of the embodiment.

[0028] In the picture:

[0029] 100. First component; 110. First connecting part; 111. First welding bevel;

[0030] 200. Second component; 210. Second connecting part; 211. Second welding bevel; 212. Groove; 213. Retaining wall;

[0031] 300, overflow trough 300. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] like Figure 3 As shown, a laser welding structure includes a first component 100, a second component 200, a surface contact welding part, and an overflow groove 300.

[0034] The first component 100 has a first connecting portion 110 arranged vertically. The second component 200 is adjacent to the first component 100 and has a second connecting portion 210 arranged vertically on the second component 200. The second connecting portion 210 corresponds to the first connecting portion 110. A surface contact weld portion is formed between the opposing side surfaces of the first connecting portion 110 and the second connecting portion 210. The surface contact weld portion refers to the part formed by the mutual contact and adhesion of the opposing side surfaces of the first connecting portion 110 and the second connecting portion 210 through laser welding. That is, the opposing side surfaces of the first connecting portion 110 and the second connecting portion 210 are adhered to each other, and then the laser welding melts the first connecting portion 110 or the second connecting portion 210, connecting them together. Welding the first connecting portion 110 and the second connecting portion 210 together can connect the first connecting portion 110 and the second connecting portion 210. Component 100 is welded to component 200, that is, component 100 and component 200 are laser welded together through surface contact welding part. Since both the first connecting part 110 and the second connecting part 210 are arranged vertically, their side surfaces are arranged vertically as a whole, so there is no need to arrange the flange structure laterally, reducing the lateral space occupied, which is suitable for welding assembly in very small spaces. At the same time, the overflow groove 300 is located above the surface contact welding part, so during the laser welding process, part of the molten material generated will overflow into the overflow groove. Therefore, the overflow groove 300 is used to contain the molten overflow generated during the laser welding process. After cooling, it can form a sealing structure in the overflow groove to improve the sealing performance between component 100 and component 200 after welding. Moreover, the overflow groove 300 is located above the surface contact welding part, which can avoid interference with the front lighting area.

[0035] Unlike existing technologies, its overflow groove 300 and the surface contact welding part are arranged in the vertical direction. There is no need to add an overflow groove 300 arranged in the horizontal direction on the first component 100 or the second component 200, and there is no need to arrange a corresponding flange structure, which can save space and is suitable for welding assembly in small spaces.

[0036] Of course, let me explain the principle of plastic laser welding: We need two materials, one that can transmit infrared light and the other that can absorb infrared light. A high-energy laser beam is irradiated onto the light-absorbing material, causing it to melt rapidly and form a permanent connection in the overflow melting tank, thereby ensuring the sealing and waterproof performance.

[0037] Therefore, in this embodiment, there are two schemes. One is that the first component 100 is made of a light-transmitting material and the second component 200 is made of a light-absorbing material. The second component 200 can be fused and welded. The other scheme is that the first component 100 is made of a light-absorbing material and the second component 200 is made of a light-transmitting material. The first component 100 can be fused and welded. Of course, the material of the first connecting part 110 is the same as the material of the first component 100, and the material of the second connecting part 210 is the same as the material of the second component 200. In this embodiment, the first scheme is adopted. The first component 100 is made of a light-transmitting material and the second component 200 is made of a light-absorbing material. A laser emitter can be set on one side of the first connecting part 110. The light emitted by the laser emitter can pass through the first connecting part 110 and act on the side surface of the second connecting part 210, so that it melts and adheres to the first connecting part 110.

[0038] Specifically, a first welding slope 111 is provided on one side of the first connecting part 110, and a second welding slope 211 is provided on one side of the second connecting part 210. The first welding slope 111 can fit with the second welding slope 211 to form a surface contact welding part. By setting the two side surfaces as matching welding slopes, the contact area between the two can be increased. After laser welding, the connection area between the first connecting part 110 and the second connecting part 210 can be increased, thereby making the connection between the first component 100 and the second component 200 more stable.

[0039] Furthermore, a groove 212 is provided on the second connecting part 210. One side wall of the groove 212 is provided as a second welding slope 211. The end of the first connecting part 110 can be inserted into the groove 212 so that the first welding slope 111 and the second welding slope 211 fit together. The groove 212 can be initially positioned, that is, the end of the first connecting part 110 is inserted into the groove 212 so that the relative position of the first component 100 and the second component 200 will not change, which facilitates subsequent positioning and laser welding.

[0040] Furthermore, in addition to its initial positioning, the groove 212 also serves a sealing function. A vertical plane is set on the side of the groove 212 away from the second welding slope 211. The end of the first connecting part 110 is in contact with the bottom of the groove 212, and the side of the first connecting part 110 away from the second connecting part 210 is in contact with the vertical plane. During the melting process, a small portion of the molten material will enter between the end of the first connecting part 110 and the bottom of the groove 212. However, due to the obstruction of the vertical plane, the molten material will not overflow from the vertical plane and the side of the first connecting part 110. Most of the molten material will still enter the overflow groove 300, avoiding side overflow that affects the appearance. At the same time, the molten material flowing into the area between the end of the first connecting part 110 and the bottom of the groove 212 can achieve a seal between the two after cooling, thereby achieving a waterproof seal on the other side of the surface-contact welding part, further improving the connection force between the first component 100 and the second component 200.

[0041] In this embodiment, the first component 100 is located above the second component 200. The second connecting portion 210 extends upward from the side away from the second welding slope 211 to form a baffle wall 213. The baffle wall 213 and the first connecting portion 110 together form an overflow groove 300. That is, the side of the second connecting portion 210 away from the second welding slope 211 has an upwardly protruding baffle wall 213. The baffle wall 213 and the first connecting portion 110 together form an open overflow groove 300. The opening of the overflow groove 300 is located in the gap between the baffle wall 213 and the first component 100. The amount of molten material overflowing generally does not exceed the capacity of the overflow groove 300 and will not overflow from the opening.

[0042] In this embodiment, the inclination angle of the second welding slope 211 is between 145° and 155°. Within this range, the contact area between the first connecting part 110 and the second connecting part 210 is guaranteed, while the overall lateral width is avoided from increasing.

[0043] In this embodiment, the tilt angle of the second welding slope 211 is preferably 150°, but other angles such as 145° and 155° can also be selected.

[0044] In this embodiment, the thickness of the surface contact welding part is 0.5mm. This thickness can ensure the welding strength between the first connecting part 110 and the second connecting part 210, and can also avoid energy loss caused by excessive welding time due to excessive thickness.

[0045] A vehicle lamp includes a laser welding structure as described above, wherein the laser welding structure is suitable for small space structures such as vehicle lamps, wherein the first component 100 is configured as a vehicle lamp lens or lamp cover, and the second component 200 is configured as a vehicle lamp housing.

[0046] Of course, in addition to vehicle lights, this laser welding structure can also be applied to other structures with high space requirements, as it does not exceed the scope of this application.

[0047] In this embodiment, a laser welding structure and a vehicle lamp are disclosed. The laser welding structure includes a first component 100, a second component 200, a surface contact welding part, and an overflow groove 300. The first component 100 and the second component 200 are respectively provided with a first connecting part 110 and a second connecting part 210 arranged in a vertical direction. The first connecting part 110 and the second connecting part 210 form a surface contact welding part through opposite side surfaces to achieve laser welding connection. The overflow groove 300 is located above the surface contact welding part and is used to collect the welding molten overflow. The first component 100 is made of a light-transmitting material, and the second component 200 is made of a light-absorbing material. The second connecting part 210 is provided with a groove 212, and its side wall is a second welding slope 211, which fits with the first welding slope 111 of the first connecting part 110. This structure reduces the lateral space occupation through vertical butt welding and is suitable for compact spaces such as vehicle lamps. At the same time, the overflow groove 300 effectively collects the molten material, ensuring sealing and waterproof performance and avoiding interference with the front lighting area.

[0048] The technical solution of this utility model has been described in detail above with reference to the accompanying drawings. The described embodiments are used to help understand the concept of this utility model. The specific embodiments described herein are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0049] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0050] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A laser welding structure, characterized in that, include: The first component has a first connecting part arranged vertically thereon; The second component is disposed adjacent to the first component, and the second component is provided with a second connecting part arranged in a vertical direction, the second connecting part corresponding to the first connecting part; A surface-contact welding portion is formed between the opposite side surfaces of the first connecting portion and the second connecting portion; An overflow groove, located above the surface-contact welding part, is used to collect molten overflow generated during laser welding. The first component and the second component are connected by laser welding through the surface contact welding part.

2. The laser welding structure according to claim 1, characterized in that, The first component is made of a light-transmitting material, and the second component is made of a light-absorbing material.

3. The laser welding structure according to claim 1, characterized in that, The first connecting part has a first welding slope on one side, and the second connecting part has a second welding slope on one side. The first welding slope can fit into the second welding slope to form the surface contact welding part.

4. The laser welding structure according to claim 3, characterized in that, The second connecting part is provided with a groove, and one side wall of the groove is provided as the second welding slope. The end of the first connecting part can be inserted into the groove so that the first welding slope and the second welding slope fit together.

5. A laser welding structure according to claim 4, characterized in that, The side of the groove away from the second welding slope is set as a vertical plane, the end of the first connecting part is in contact with the bottom of the groove, and the side of the first connecting part away from the second connecting part is in contact with the vertical plane.

6. A laser welding structure according to claim 4, characterized in that, The first component is located above the second component, and the second connecting part extends upward on the side away from the second welding slope to form a retaining wall. The retaining wall and the first connecting part together form the overflow trough.

7. A laser welding structure according to claim 3, characterized in that, The inclination angle of the second welding bevel is between 145° and 155°.

8. A laser welding structure according to claim 7, characterized in that, The inclination angle of the second welding bevel is 150°.

9. A laser welding structure according to claim 1, characterized in that, The thickness of the surface contact weld is 0.5 mm.

10. A vehicle light, characterized in that, include: The laser-welded structure as described in any one of claims 1-9.

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