Protection structure and laser welding device

Abstract

The embodiment of the utility model discloses a protection structure and a laser welding device, and relates to the technical field of production equipment. The protection structure comprises a cap body and an air inlet unit. The cap body is of a cover-shaped structure with an opening in one side and is used for covering a machined product. The gas inlet unit is used for introducing protective gas. Wherein a flow channel is formed in the cap body, and the air inlet unit is in fluid communication with the opening of the cap body through the flow channel. According to the protection structure, through the arrangement of the air inlet unit and the flow channel, the interior of the cap body can be in a positive pressure state in the machining process, so that welding spatter in the laser welding process is effectively prevented from entering the surface of a sensing element of a machined product in the cap body, and then the welding quality of the machined product can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of production equipment, in particular to a protective structure and a laser welding device. Background Art

[0002] In the application scenarios of laser welding, spatter during welding is always a difficult problem.

[0003] There are two main methods used to prevent laser welding in related technologies. The first is to develop new laser technology and optimize welding parameters to reduce the amount of spatter accordingly, but the laser hardware investment cost involved in this solution is relatively high. The second method is to add a mechanical shielding mechanism to prevent spatter from affecting the corresponding functional area, but this solution is restricted by factors such as the installation space and the space between components. For example, the sensor element welding anti-splash device in the related technology only relies on a protective cap to cover the upper surface and side of the sensor element, thereby preventing the sensor element welding spatter from reaching the sensor element surface. However, in this solution, due to the mechanical design of the protective cap, it is necessary to ensure that there is a gap between the protective cap and the sensor element (such as Figure 1 As shown in the figure, this gap is used for the product to move into the protective cap). At this time, laser welding spatter still has a probability of falling onto the surface of the sensor element, thus causing product function failure. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a protective structure and a laser welding device to avoid laser welding spatter and improve the product quality of the processed product.

[0005] The utility model embodiment discloses a protection structure for protecting a processed product, the protection structure comprising:

[0006] The cap body has a cover-like structure with one side open and is used to cover the processed product;

[0007] An air inlet unit, used for introducing protective gas;

[0008] A flow channel is provided in the cap body, and the air inlet unit is fluidically connected with the opening of the cap body through the flow channel.

[0009] Furthermore, the flow channel includes an air inlet and an air outlet that are interconnected, the air inlet is connected to the air inlet unit, the air outlet is arranged on the inner bottom wall of the cap body away from the outlet, and the air outlet is set through the axial direction of the cap body.

[0010] Furthermore, there are multiple air outlet holes, and the multiple air outlet holes are evenly spaced and arranged in the circumferential direction of the inner bottom wall.

[0011] Furthermore, there are multiple air inlet holes, and any air inlet hole is fluidically connected to multiple air outlet holes.

[0012] Furthermore, the number of the air outlet holes is the same as the number of the air inlet holes, and the multiple air inlet holes are respectively arranged on the circumference of the side wall of the cap body, the air inlet holes correspond to the air outlet holes one by one, and the multiple air inlet holes are respectively close to the corresponding air outlet holes.

[0013] Furthermore, the radial plane where the air inlet is located is higher than the radial plane where the air outlet is located.

[0014] Furthermore, the protective gas introduced into the air intake unit is an inert gas.

[0015] The utility model embodiment also discloses a laser welding device, including the above-mentioned protective structure, the laser welding device also includes: a moving structure, the cap body is installed on the moving structure, and the moving structure can move the cap body to a preset position; a welding structure, used for laser welding the processed product.

[0016] Furthermore, the movable structure includes a first fixed bracket, a slider and a second fixed bracket, the cap body is connected to one side of the second fixed bracket, the other side of the second fixed bracket is slidably set in the conducting groove of the slider along the first preset direction, and the slider is slidably set in the sliding groove of the first fixed bracket along the second preset direction, wherein the first preset direction and the second preset direction are perpendicular to each other.

[0017] Furthermore, the laser welding device also includes an exhaust pipe, which is close to the opening of the cap body.

[0018] Furthermore, the laser welding device also includes a fixing device for mounting the processed product, and the fixing device can rotate along its own axis direction.

[0019] The protective structure provided by the utility model has the following beneficial effects, including but not limited to:

[0020] 1) The protective structure can be arranged with the air inlet unit and the flow channel so that the inside of the cap body can be in a positive pressure state during the processing, thereby effectively preventing welding spatter during the laser welding process from entering the sensor element surface of the processed product in the cap body;

[0021] 2) The inert gas introduced by the air intake unit in the protection structure can effectively protect the weld surface from oxidation, thereby improving the quality of the product weld appearance;

[0022] 3) The structural design of the protective structure is compact and will not interfere with other hardware facilities of the equipment. It does not require a large installation space, the cost of the protective gas used is relatively low, and the maintenance is relatively simple. It has a wide range of applications and can be used in most laser welding anti-splash application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0024] Figure 1 A schematic diagram of a sensor element welding splash prevention method in the related art;

[0025] Figure 2 A schematic diagram of a protection structure provided by an embodiment of the utility model;

[0026] Figure 3 Another structural schematic diagram of the protection structure provided by the embodiment of the utility model;

[0027] Figure 4 A cross-sectional view of a protective structure provided by an embodiment of the utility model;

[0028] Figure 5 A bottom view of the protection structure provided by the embodiment of the utility model;

[0029] Figure 6 A schematic diagram of the structure of the mobile structure and the protective structure provided in the embodiment of the utility model in cooperation with each other;

[0030] Figure 7 This is a schematic diagram of the application of the laser welding device provided in an embodiment of the utility model.

[0031] Icon: 100-Protective structure;

[0032] 10-cap body; 101-opening; 102-flow channel; 103-air inlet; 104-air outlet; 105-inner bottom wall; 106-side wall;

[0033] 111-first fixed bracket; 1111-sliding groove; 112-sliding block; 1121-conducting groove; 113-second fixed bracket;

[0034] 12-exhaust pipe; 13-welding structure; 14-fixed tooling;

[0035] 200-Processed products. DETAILED DESCRIPTION

[0036] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0037] It should be noted that the illustrations provided in the following embodiments are only used to schematically illustrate the basic concept of the present invention, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0038] Please refer to Figure 2 and Figure 3 The utility model provides a protective structure 100, which includes a cap body 10 and an air intake unit (not shown in the figure). The cap body 10 is a cover-shaped structure with an opening 101 on one side, and is used to cover the processed product 200. The air intake unit is used to introduce protective gas. Among them, a flow channel 102 is opened in the cap body 10, and the air intake unit is fluidically connected with the opening 101 of the cap body 10 through the flow channel 102.

[0039] It is worth noting that the protective structure 100 can be arranged with the air intake unit and the flow channel 102 so that the inside of the cap body 10 can be in a positive pressure state during the processing, thereby effectively preventing welding spatter during laser welding from entering the sensor element surface of the processed product 200 in the cap body 10, thereby improving the welding quality of the processed product 200.

[0040] In this embodiment, the flow channel 102 includes an air inlet 103 and an air outlet 104 that are interconnected. The air inlet 103 is connected to the air inlet unit. The air outlet 104 is arranged on the inner bottom wall 105 of the cap body 10 away from the outlet 101, and the air outlet 104 is set through the axial direction of the cap body 10.

[0041] It is worth noting that the air outlet 104 passes through the entire cap body 10 along the axial direction of the cap body 10, that is, the air outlet 104 extends from the opening direction to the bottom position of the inner bottom wall 105 of the cap body 10. This structural setting can enable the shielding gas to flow smoothly along the axial direction of the cap body 10, thereby optimizing the flow path of the shielding gas, improving the flow efficiency of the shielding gas, and thus enhancing the anti-interference ability against welding spatter.

[0042] like Figure 3 and Figure 5As shown, there are multiple air outlet holes 104 , and the multiple air outlet holes 104 are evenly spaced and arranged in the circumferential direction of the inner bottom wall 105 .

[0043] It is worth noting that the multiple air outlet holes 104 are evenly distributed in the circumferential direction, which can ensure that the protective gas discharged from the flow channel 102 is evenly distributed in space, avoiding the problem of protective gas accumulation or uneven flow in certain areas. In addition, due to the uniform arrangement of the multiple air outlet holes 104, the ventilation effect in the space can be enhanced, so that the gas can be discharged more effectively, and the efficiency of air flow is improved. The multiple air outlet holes 104 in this embodiment are arranged in a ring shape around the circumferential edge of the inner bottom wall 105 of the cap body 10. Depending on the specific implementation environment, the multiple air outlet holes 104 can also be arranged evenly spaced on the circumference of the inner bottom wall 105 in other structural forms according to the different structural shapes of the cap body 10, for example, a rectangle.

[0044] Please refer to Figure 4 , there are multiple air inlet holes 103, and any air inlet hole 103 is in fluid communication with multiple air outlet holes 104. It is understandable that the communication setting of multiple air inlet holes 103 and multiple air outlet holes 104 can further improve the transmission efficiency of the fluid, and avoid the problem of channel blockage when the air inlet hole 103 and the air outlet hole 104 are connected separately. For example, when a certain air inlet hole 103 is damaged and blocked, the protective gas can also be introduced into the remaining air inlet holes 103, and then enter different air outlet holes 104, so as to achieve uniform distribution of the protective gas, increase the flexibility of the flow channel 102 structure, and improve the ventilation effect.

[0045] Please refer again Figure 3 In this embodiment, the number of the air outlet holes 104 is the same as the number of the air inlet holes 103, and the multiple air inlet holes 103 are respectively arranged on the circumference of the side wall 106 of the cap body 10, the air inlet holes 103 correspond to the air outlet holes 104 one by one, and the multiple air inlet holes 103 are respectively close to the corresponding air outlet holes 104.

[0046] It is worth noting that each air inlet 103 is directly connected to its corresponding air outlet 104, which can ensure the accurate matching of the protective gas from intake to exhaust, realize precise fluid control and regulation, and facilitate the uniform distribution and transmission of the protective gas in the flow channel 102, avoiding the problem of local pressure unevenness or gas accumulation.

[0047] In this embodiment, the radial plane where the air inlet 103 is located is higher than the radial plane where the air outlet 104 is located.

[0048] It is understandable that the radial plane where the air inlet 103 is located is higher than the radial plane where the air outlet 104 is located, that is, in terms of axial height, the air inlet 103 is higher than the air outlet 104. At this time, due to the influence of gravity, the phenomenon of reverse flow of the protective gas can be prevented, the accumulation of the protective gas can be reduced, the exhaust efficiency can be improved, and the distribution of the protective gas can be improved, thereby improving the overall performance of the flow channel 102 and further avoiding the occurrence of laser splashing to the processed product 200.

[0049] In this embodiment, the protective gas introduced into the air inlet unit is an inert gas.

[0050] Specifically, the gas introduced into the air intake unit in this embodiment is nitrogen. It can be understood that by filling the inert protective gas nitrogen, it is ensured that the internal cavity of the cap body 10 is always in a positive pressure state, thereby effectively preventing the welding spatter during the laser welding process from entering the sensor element surface of the processed product 200 inside the cap body 10. At the same time, the protective gas nitrogen can also effectively protect the weld surface from oxidation, thereby improving the quality of the product weld appearance. The protective gas nitrogen used is also relatively low in cost and relatively simple to maintain, and is suitable for most laser welding anti-splash application scenarios. Depending on the specific implementation environment, argon, helium, etc., as well as some other gases can also be used as protective gases, such as carbon dioxide, which can help prevent oxygen from entering the area in contact with the metal surface during welding to reduce oxidation.

[0051] Please refer to Figure 6 and Figure 7 The embodiment of the present application also provides a laser welding device, including the protective structure 100 as described above, and the laser welding device also includes a moving structure and a welding structure 13. The cap body 10 is installed on the moving structure, and the moving structure can move the cap body 10 to a preset position. The welding structure 13 is used to perform laser welding on the processed product 200.

[0052] In this embodiment, the movable structure includes a first fixed bracket 111, a slider 112 and a second fixed bracket 113. The cap body 10 is connected to one side of the second fixed bracket 113. The other side of the second fixed bracket 113 is slidably set in the guide groove 1121 of the slider 112 along a first preset direction (as shown in the figure). The slider 112 is slidably set in the slide groove 1111 of the first fixed bracket 111 along a second preset direction (as shown in the figure), wherein the first preset direction and the second preset direction are perpendicular to each other.

[0053] It can be understood that the first preset direction is perpendicular to the second preset direction, and can provide multi-directional movement capabilities, so that the protective structure 100 can be accurately positioned and adjusted in different directions. It has greater flexibility, can meet the needs of different scenarios, and improves the applicability of the device.

[0054] In this embodiment, the laser welding device further includes an exhaust pipe 12, which is close to the opening 101 of the cap body 10. It is understandable that the exhaust pipe 12 can adopt a structural device in the relevant technology, which can absorb the spatter and shielding gas during the laser welding process to avoid gas accumulation or laser spatter from scattering to other areas.

[0055] In this embodiment, the laser welding device further includes a fixing fixture 14 for mounting the processed product 200 , and the fixing fixture 14 can rotate along its own axis direction.

[0056] In summary, the working process of the laser welding device is as follows:

[0057] First, the processed product 200 is placed in the fixed tooling 14; then the fixed tooling 14 moves the processed product 200 from the original position to the working position ( Figure 7 The cap body 10 is then moved to a preset position ( Figure 7 As shown in the area, the surface and sides of the sensor element of the processed product 200 are covered by the cap body 10; when the fixed tooling 14 starts to rotate, the inert protective gas nitrogen (N2) is introduced into the air inlet 103 on the protective cap, so that the inside of the cap body 10 is under positive pressure; when the rotation speed of the fixed tooling 14 reaches the required welding speed, the laser starts to emit light for welding. At this time, the spatters generated during the laser welding process cannot enter the cap body 10 and are sucked away by the exhaust pipe 12; after the laser welding is completed, the fixed tooling 14 stops rotating, and then the fixed tooling 14 returns to its original position, completing the laser welding of the sensor element of the processed product 200.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

[0059] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more specific details or by other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

[0060] References throughout the specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described herein and shown may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0061] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0062] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

[0063] As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless otherwise indicated.

[0064] The above description of the illustrated embodiments of the present invention (including the contents in the abstract of the specification) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and understood by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments of the present invention, and these modifications will be within the spirit and scope of the present invention.

[0065] Systems and methods have been generally described herein as details that are helpful for understanding the present invention. In addition, various specific details have been given to provide an overall understanding of the embodiments of the present invention. However, those skilled in the relevant art will recognize that the embodiments of the present invention can be practiced without one or more specific details, or practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of the embodiments of the present invention.

Claims

1. A protective structure for protecting a processed product, characterized in that: include: A cap body, which has a cover-like structure with one side open, and is used to cover the processed product; An air inlet unit, used for introducing protective gas; Wherein, a flow channel is opened in the cap body, and the air intake unit is in fluid communication with the opening of the cap body through the flow channel.

2. The protective structure according to claim 1, characterized in that: The flow channel includes an air inlet and an air outlet that are interconnected. The air inlet is connected to the air inlet unit. The air outlet is arranged on the inner bottom wall of the cap body away from the opening, and the air outlet is set through the axial direction of the cap body.

3. The protective structure according to claim 2, characterized in that: There are multiple air outlet holes, and the multiple air outlet holes are evenly spaced and arranged in the circumferential direction of the inner bottom wall.

4. The protective structure according to claim 3, characterized in that: There are multiple air inlet holes, and any one of the air inlet holes is fluidically connected to multiple air outlet holes.

5. The protective structure according to claim 3 or 4, characterized in that: The number of the air outlet holes is the same as the number of the air inlet holes, and the multiple air inlet holes are respectively arranged on the circumference of the side wall of the cap body, the air inlet holes correspond to the air outlet holes one by one, and the multiple air inlet holes are respectively close to the corresponding air outlet holes.

6. The protective structure according to claim 2, characterized in that: The radial plane where the air inlet hole is located is higher than the radial plane where the air outlet hole is located.

7. The protective structure according to claim 1, characterized in that: The protective gas introduced into the air inlet unit is an inert gas.

8. A laser welding device, comprising the protective structure according to any one of claims 1 to 7, characterized in that: The laser welding device also includes: A moving structure, the cap body is mounted on the moving structure, and the moving structure is capable of moving the cap body to a preset position; The welding structure is used for laser welding the processed product.

9. The laser welding device according to claim 8, characterized in that: The movable structure includes a first fixed bracket, a slider and a second fixed bracket, the cap body is connected to one side of the second fixed bracket, the other side of the second fixed bracket is slidably set in the conducting groove of the slider along a first preset direction, and the slider is slidably set in the sliding groove of the first fixed bracket along a second preset direction, wherein the first preset direction and the second preset direction are perpendicular to each other.

10. The laser welding device according to claim 8, characterized in that: The laser welding device further includes an exhaust pipe, which is close to the opening of the cap body.

11. The laser welding device according to claim 8, characterized in that: The laser welding device further comprises a fixing fixture for mounting the processed product, and the fixing fixture can rotate along its own axis direction.

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