Laser welding device

Abstract

The utility model provides a laser welding device. The laser welding device comprises a laser generator and a compound mirror, and the laser generator is used for emitting laser; the compound mirror is located on the light emitting side of the laser generator and comprises a redirection part and a focusing part, and at least one of the redirection part and the focusing part is located on a light emitting path of the laser generator; wherein the laser penetrating through the focusing part forms a welding light spot on the welding plane, and the laser penetrating through the redirection part forms a heating light spot on the welding plane. The laser welding device is simple in structure, the welding effect can be improved, and the use flexibility of the laser welding device is improved.

Description

Technical Field

[0001] The present application relates to the field of laser technology, and in particular to a laser welding device. Background Art

[0002] In today's society, lasers are used more and more widely, for example, in welding, material surface treatment, etc. In actual welding applications, due to the large temperature difference between the welding point and the material around the welding point, large thermal stress is easily generated; under the influence of thermal stress, the welded product will deform, thus affecting the final welding effect. Utility Model Content

[0003] The present application provides a laser welding device with a simple structure, which can improve the welding effect and increase the flexibility of use of the laser welding device.

[0004] In order to solve the above technical problems, the present application provides a laser welding device, which includes a laser generator and a compound mirror. The laser generator is used to emit laser light; the compound mirror is located on the light-emitting side of the laser generator, and the compound mirror includes a redirecting part and a focusing part. At least one of the redirecting part and the focusing part is located on the light-emitting optical path of the laser generator; wherein the laser light passing through the focusing part forms a welding spot on the welding plane, and the laser light passing through the redirecting part forms a heating spot on the welding plane.

[0005] The beneficial effects of the present application are as follows: the laser welding device of the present application includes a laser generator and a composite mirror, the composite mirror includes a redirecting part and a focusing part, at least one of the redirecting part and the focusing part is located on the light output path of the laser generator, so that the laser welding device can form a heating spot and a welding spot as needed, which can improve the use flexibility of the laser welding device and improve the welding effect; further, the present embodiment can realize the shaping of the laser emitted by the laser generator to form a heating spot and a welding spot through a composite mirror, has a simple structure, is easy to assemble and use, can effectively reduce the assembly complexity of the laser welding device, and improve the use flexibility of the laser welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0007] Figure 1 It is a structural schematic diagram of an embodiment of the laser welding device of the present application;

[0008] Figure 2 yes Figure 1A front view schematic diagram of an embodiment;

[0009] Figure 3 yes Figure 1 A schematic top view of an embodiment;

[0010] Figure 4 yes Figure 1 A schematic side view of an embodiment;

[0011] Figure 5 is a schematic structural diagram of another embodiment of the laser welding device of the present application;

[0012] Figure 6 yes Figure 5 A front view schematic diagram of an embodiment;

[0013] Figure 7 yes Figure 5 A schematic top view of an embodiment;

[0014] Figure 8 yes Figure 5 A schematic side view of an embodiment. DETAILED DESCRIPTION

[0015] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0016] The terms "first", "second" and the like in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that when used in this specification and the appended claims, the term "including" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. It should also be understood that the terms used in this specification of the application are only for the purpose of describing a specific embodiment and are not intended to limit the application. As used in this specification of the application and the appended claims, unless the context clearly indicates otherwise, the singular forms of "one", "an" and "the" are intended to include plural forms. It should also be further understood that the term "and / or" used in this specification of the application and the appended claims refers to any combination of one or more of the items listed in association and all possible combinations, and includes these combinations.

[0017] It should be noted that when a certain element is fixed to another element, it includes directly fixing the element to the other element, or fixing the element to the other element through at least one other element in the middle. When an element is connected to another element, it includes directly connecting the element to the other element, or connecting the element to the other element through at least one other element in the middle.

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

[0019] This application first proposes a laser welding device, such as Figure 1 As shown, the laser welding device includes a laser generator 10 and a composite mirror 20. The laser generator 10 is used to emit laser light. The composite mirror 20 is located at the light-emitting side of the laser generator 10. The composite mirror 20 includes a redirecting portion 21 and a focusing portion 22. At least one of the redirecting portion 21 and the focusing portion 22 is located on the light-emitting optical path of the laser generator 10. Figure 3 , Figure 4 As shown, the laser light passing through the focusing portion 22 forms a welding spot on the welding plane A, and the laser light passing through the redirecting portion 21 forms a heating spot on the welding plane A.

[0020] The laser generator 10 is used to emit laser light, and the emitted laser light beam can be an array parallel light beam; the composite mirror 20 of this embodiment can shape the laser light beam emitted by the laser generator 10, so that the laser welding device can form a welding spot and a heating spot; in some embodiments, the laser welding device can only form a welding spot (such as Figure 7 In other embodiments, the laser welding device may only form a heating spot (not shown); in other embodiments, the laser welding device may simultaneously form a welding spot and a heating spot (such as Figure 3 shown).

[0021] It should be noted that the light spot emitted by the laser welding device can be controlled by adjusting the relative position of the composite mirror 20 and the laser generator 10 as needed, or by adjusting the size of the laser beam emitted by the laser generator 10.

[0022] Among them, the welding spot can be used as a high-energy welding light source for welding material fusion welding. In actual welding applications, the large temperature difference between the welding point and the materials around the welding point can easily generate large thermal stress, which can cause the welded product to deform, thus affecting the welding quality. The heating spot can be used for preheating and post-heating the welding area, or can be used to heat the surrounding area of ​​the welding area during the welding process to reduce the thermal stress during welding, thereby effectively reducing the thermal deformation of the welding material and improving the welding effect.

[0023] Among them, preheating refers to heating the workpiece to be welded before welding begins, the purpose is to increase the temperature of the workpiece to be welded, reduce its thermal conductivity, reduce the temperature gradient during welding, and thus reduce welding stress; post-heating refers to the heating treatment of the workpiece to be welded after welding is completed, the purpose is to slowly cool the welding area and reduce welding stress.

[0024] In one application scenario, when a heating spot is needed for preheating or post-heating, the laser welding device can be controlled to emit a heating spot alone; in another application scenario, when a heating spot is needed for preheating or post-heating, the laser welding device can be controlled to emit a heating spot and a welding spot at the same time, and the welding spot is used to weld the area currently being welded, while the heating spot is controlled to preheat the area to be welded or post-heat the area that has been welded. The positional relationship between the heating spot and the welding spot is not limited, for example, they can overlap, connect, or be set at intervals.

[0025] The beneficial effect of the above arrangement is that the laser welding device of the present embodiment comprises a laser generator 10 and a compound mirror 20, the compound mirror 20 comprises a redirecting portion 21 and a focusing portion 22, at least one of the redirecting portion 21 and the focusing portion 22 is located on the light output path of the laser generator 10, so that the laser welding device can form a heating spot and a welding spot as needed, which can improve the use flexibility of the laser welding device and improve the welding effect; further, the present embodiment can realize the shaping of the laser emitted by the laser generator to form a heating spot and a welding spot through a compound mirror 20, has a simple structure, is easy to assemble and use, can effectively reduce the assembly complexity of the laser welding device, and improve the use flexibility of the laser welding device.

[0026] In some embodiments, Figure 3 , Figure 4 As shown, the refraction direction of the laser by the redirecting portion 21 is inclined toward the focal line of the focusing portion 22, so that the welding spot and the heating spot are partially overlapped or connected.

[0027] The welding spot and the heating spot are partially overlapped or connected, which makes it easy to use the heating spot to heat the welding peripheral area connected to the welding area during the welding process, thereby reducing the thermal stress during welding, and effectively reducing the thermal deformation of the welding material and improving the welding effect.

[0028] In other embodiments, the structure of the redirecting portion can be adjusted to adjust the refraction angle of the laser passing through the redirecting portion, so as to adjust the specific position of the heating spot formed by the laser welding device, thereby making the laser welding device adaptable to corresponding usage scenarios, for example, making the heating spot and the welding spot not connected, etc., and the details are not repeated here.

[0029] In some embodiments, the redirecting portion 21 includes a first redirecting portion 211 and a second redirecting portion 212 , and the first redirecting portion 211 and the second redirecting portion 212 are located on two opposite sides of the focusing portion 22 .

[0030] The first redirecting portion 211 and the second redirecting portion 212 are located on two sides of the focusing portion 22 that are relatively arranged, so that the heating spot is distributed on both sides of the welding spot, that is, it is convenient to improve the distribution uniformity of the heating spot on the periphery of the welding spot. Therefore, during the welding process, the welding peripheral area connected to the welding area can be heated more evenly, thereby reducing the thermal stress during welding, reducing the thermal deformation of the welding material, and improving the welding effect.

[0031] For example, in an application scenario, the first redirecting portion 211, the focusing portion 22, and the second redirecting portion 212 are sequentially arranged along the first direction x, and the first direction x is perpendicular to the light path. This arrangement can also facilitate adjusting whether the redirecting portion 21 and the focusing portion 22 are located on the light path by adjusting the relative position of the composite mirror 20 and the laser generator 10, thereby facilitating the control of the light spot emitted by the laser welding device.

[0032] In other embodiments, the redirecting portion may be provided only on one side of the focusing portion, or the redirecting portion may be provided around the circumference of the focusing portion, etc., and the specific embodiments are not limited thereto.

[0033] In some embodiments, the laser passing through the first redirecting portion 211 and the second redirecting portion 212 respectively forms a first heating spot and a second heating spot on the welding plane A, and the first heating spot and the second heating spot are partially overlapped or connected.

[0034] The first redirecting portion 211 and the second redirecting portion 212 are located on two sides of the focusing portion 22 that are opposite to each other, and the first heating spot and the second heating spot are partially overlapped or connected, so that the heating spot formed by the first heating spot and the second heating spot completely covers the welding spot, thereby facilitating the improvement of the uniformity of the distribution of the heating spot formed by the first heating spot and the second heating spot around the welding spot. Therefore, during the welding process, the welding peripheral area connected to the welding area can be heated more evenly, thereby reducing the thermal stress during welding, reducing the thermal deformation of the welding material, and improving the welding effect.

[0035] In other embodiments, the refraction angle of the first redirecting portion or the second redirecting portion to the laser beam can be adjusted by adjusting the structure of the first redirecting portion or the second redirecting portion, thereby adjusting the position of the first heating spot or the second heating spot (for example, the first heating spot and the second heating spot are arranged at intervals, and the two are located on both sides of the welding spot and are arranged in connection with the welding spot, etc.) to adjust the shape of the heating spot formed by the first heating spot and the second heating spot, etc., so as to adapt to different usage scenarios. The details will not be repeated here.

[0036] In some embodiments, the spot emitted by the laser welding device can be controlled by controlling the size of the laser beam emitted by the laser generator 10. In one application scenario (not shown), by controlling the size of the laser beam emitted by the laser generator, the laser beam can be controlled to pass only through the focusing portion to form a welding spot; in another application scenario (not shown), the size of the laser beam is controlled so that the laser beam only passes through the redirecting portion to form a heating spot; in another application scenario, Figure 3 As shown, the size of the laser beam is controlled so that the laser beam passes through the focusing portion and the redirecting portion at the same time to form a heating spot and a welding spot.

[0037] In some embodiments, the laser generator 10 includes a plurality of light-emitting units arranged in an array, and the light-emitting units are selectively controlled to emit light to adjust the light output path of the laser emitted by the laser generator 10, so that at least one of the redirecting part 21 and the focusing part 22 is located on the light output path of the laser generator.

[0038] The above-mentioned arrangement can adjust the light path of the laser generator 10 by controlling the light emission of different light-emitting units, thereby facilitating the control of the size of the laser beam emitted by the laser generator 10. Since this arrangement facilitates the adjustment of whether the redirecting part 21 and the focusing part 22 are located on the light path, it is possible to facilitate the control of the light spot emitted by the laser welding device.

[0039] In some embodiments, the light spot emitted by the laser welding device can also be controlled by controlling the relative position of the composite mirror 20 and the laser generator 10 .

[0040] In some embodiments, Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, the redirecting portion 21 and the focusing portion 22 are arranged along the first direction x, the first direction x is perpendicular to the light-emitting optical path, and the light-emitting optical path is parallel to the fourth direction y; the laser welding device also includes a rotating component, which is connected to the laser generator 10 and drives the laser generator 10 to rotate in a plane perpendicular to the light-emitting optical path, so that the laser generator 10 and the composite mirror 20 move relative to each other to switch between the first state and the second state; wherein, in the first state, as Figure 5 , Figure 6 As shown, only the focusing portion 22 is located on the light-emitting path; in the second state, as shown Figure 1 , Figure 2 As shown, the redirecting portion 21 and the focusing portion 22 are both located on the light-emitting path.

[0041] The setting of the rotating component can realize the control of the light spot emitted by the laser welding device by controlling the relative movement of the laser generator 10 and the composite mirror 20, which is convenient for realizing the switching of the laser welding device between different states of emitting different light spots, thereby improving the convenience of using the laser welding device; further, the redirecting part 21 and the focusing part 22 are arranged along the first direction x, and the first direction x is perpendicular to the light output path, which can facilitate the switching between the first state and the second state by controlling the laser generator 10 to rotate in a plane perpendicular to the light output path, which is convenient for operation and has a simple structure and is easy to assemble.

[0042] In some embodiments, the laser welding device further includes a driving member connected to the rotating assembly, and configured to drive the rotating assembly to drive the laser generator 10 to rotate at a first angle within a plane perpendicular to the first direction x.

[0043] The arrangement of the driving member can realize the driving of the rotating assembly, can improve the automation degree of the laser welding device, and improve the convenience of use for users. The driving member of this embodiment can be a motor, a cylinder, etc., which is not specifically limited.

[0044] In some embodiments, the laser welding device further comprises a controller, which is electrically connected to the driving component, the laser generator, etc., to control the operation of these components. The controller comprises a chip or an integrated circuit, etc., which at least has a control function.

[0045] In other embodiments, the rotating component may also be connected to the compound mirror to drive the compound mirror to rotate in a plane perpendicular to the light output path, so that the laser generator and the compound mirror move relative to each other to switch between the first state and the second state.

[0046] In other embodiments, the laser generator or the compound mirror may be manually controlled to rotate in a plane perpendicular to the light output path, so that the laser generator and the compound mirror move relative to each other to switch between the first state and the second state.

[0047] In some embodiments, a first dimension of a laser spot along a second direction of a laser emitted by a laser generator 10 at a composite mirror 20 is greater than a second dimension of a laser spot along a third direction; the second direction is perpendicular to the third direction, and the second direction and the third direction are parallel to a plane, which is a plane perpendicular to the light output path, that is, the second direction, the third direction, and the light output path are perpendicular to each other.

[0048] The laser spot of the laser emitted by the laser generator 10 on the compound mirror 20 refers to the laser spot formed on the light incident side of the compound mirror 20 by the laser emitted by the laser generator 10 .

[0049] The beneficial effect of the above-mentioned arrangement is that the first dimension is set larger than the second dimension, and the second direction, the third direction, and the light-emitting optical path are perpendicular to each other, which makes it easier to realize the switching of the focusing part 22 being located alone on the light-emitting optical path or the focusing part 22 and the redirecting part 21 being located on the light-emitting optical path at the same time through the rotation of the laser generator 10 or the compound mirror 20, that is, to realize the switching between the first state and the second state.

[0050] In the first state, the first direction x is parallel to the third direction, the first size is smaller than or equal to the size of the focusing portion 22 along the second direction, and the second size is smaller than the size of the focusing portion 22 along the third direction.

[0051] Specifically, in some embodiments, the laser spot is a rectangular array spot, the first size of the laser spot along the second direction is used as the long side size of the rectangular array spot, and the second size of the laser spot along the third direction is used as the wide side size of the rectangular array spot, wherein the first size is larger than the second size.

[0052] Taking the rectangular array spot as an example, in the first state, Figure 5 , Figure 6 As shown, the first direction x is parallel to the third direction, that is, the arrangement direction of the redirecting portion 21 and the focusing portion 22 is parallel to the direction of the wide side of the rectangular array light spot; since the second direction is perpendicular to the third direction and the light path, the second direction is perpendicular to the third direction and the light path. Figure 6 The first dimension is smaller than the dimension of the focusing part 22 along the second direction, that is, the dimension of the rectangular array light spot in the direction z is smaller than the dimension of the focusing part. Therefore, it is convenient for the light beam corresponding to the rectangular array light spot in the direction z (i.e., the second direction) to pass through the compound mirror 20 completely, thereby reducing the risk of the light beam directly irradiating the welding plane A without passing through the compound mirror 20; the second dimension is smaller than the dimension of the focusing part 22 along the third direction, that is, the dimension of the rectangular array light spot in the arrangement direction of the redirecting part 21 and the focusing part 22 is smaller than the dimension of the focusing part 22. Therefore, it is convenient to realize that in the first state, only the focusing part 22 is located on the light emitting path, that is, the light beam corresponding to the rectangular array light spot can only pass through the focusing part 22 in the compound mirror 20, thereby forming a welding spot on the welding plane A.

[0053] In the second state, the first direction x is parallel to the second direction, the first dimension is larger than the dimension of the focusing portion 22 along the second direction, and the second dimension is smaller than the dimension of the focusing portion 22 along the third direction.

[0054] Specifically, taking the rectangular array spot as an example, in the second state, Figure 1 , Figure 2 , Figure 3 As shown in the figure, the first direction x is parallel to the second direction, that is, the arrangement direction of the redirecting portion 21 and the focusing portion 22 is parallel to the direction in which the long side of the rectangular array light spot is located; the first size is larger than the size of the focusing portion 22 along the second direction, that is, the size of the rectangular array light spot is larger than the size of the focusing portion 22 in the arrangement direction of the redirecting portion 21 and the focusing portion 22, so it is easy to realize that the redirecting portion 21 and the focusing portion 22 are both located on the light output path in the second state, so it is easy to make the light beam corresponding to the rectangular array light spot pass through the redirecting portion 21 and the focusing portion 22 at the same time, and then a heating spot and a welding spot can be formed on the welding plane A; since the second direction is perpendicular to the third direction and the light output path, the third direction is perpendicular to the third direction at this time. Figure 2 The second dimension is smaller than the dimension of the focusing portion 22 along the third direction, that is, the dimension of the rectangular array light spot in the direction z is smaller than the dimension of the focusing portion 22. This facilitates the light beam corresponding to the rectangular array light spot in the direction z (i.e., the third direction) to pass through the compound mirror 20, thereby reducing the risk of the light beam directly irradiating the welding plane A without passing through the compound mirror 20.

[0055] In other embodiments, in the above-mentioned first state, the first direction is parallel to the third direction, and in the second direction perpendicular to the third direction and the light emitting direction, the size of the rectangular array light spot can also be equal to the size of the focusing part, which also facilitates that the light beam corresponding to the rectangular array light spot can all pass through the compound mirror in the second direction, thereby reducing the risk of the light beam directly irradiating the welding plane without passing through the compound mirror.

[0056] In other embodiments, in the above-mentioned first state, the first direction is parallel to the third direction, and the size of the rectangular array light spot in the first direction may also be equal to the size of the focusing part, that is, in the arrangement direction of the redirecting part and the focusing part, the size of the rectangular array light spot may also be equal to the size of the focusing part, and only the focusing part may be located on the light output path, which will not be repeated here.

[0057] In other embodiments, in the above-mentioned second state, the first direction is parallel to the second direction, and in a third direction perpendicular to the second direction and the light emitting direction, the size of the rectangular array light spot can also be equal to the size of the focusing part, which also facilitates the light beam corresponding to the rectangular array light spot to pass through the compound mirror in the third direction, thereby reducing the risk of the light beam directly irradiating the welding plane without passing through the compound mirror.

[0058] In other embodiments, the laser spot of the laser emitted by the laser generator on the composite mirror can also be an array spot of other shapes such as a trapezoid, not limited to a rectangle, and the first dimension of the array spot along the second direction is greater than the second dimension along the third direction; the second direction is perpendicular to the third direction, and the second direction and the third direction are parallel to the plane, which refers to the plane perpendicular to the light output path; in the first state, the first direction (i.e., the arrangement direction of the redirecting part and the focusing part) is parallel to the third direction, the first dimension of the array spot is less than or equal to the dimension of the focusing part along the second direction, and the second dimension of the array spot is less than or equal to the dimension of the focusing part along the third direction; in the second state, the first direction (i.e., the arrangement direction of the redirecting part and the focusing part) is parallel to the second direction, the first dimension of the array spot is greater than the dimension of the focusing part along the second direction, and the second dimension of the array spot is less than or equal to the dimension of the focusing part along the third direction.

[0059] In some embodiments, the laser generator 10 is controlled to rotate 90 degrees in a plane perpendicular to the light path of the emitted light to complete the switching between the first state and the second state.

[0060] Specifically, in the first state, the first direction x is parallel to the third direction, that is, the arrangement direction of the redirecting portion 21 and the focusing portion 22 is parallel to the third direction; in the second state, the first direction x is parallel to the second direction, that is, the arrangement direction of the redirecting portion 21 and the focusing portion 22 is parallel to the second direction; and the second direction is perpendicular to the third direction. Therefore, the rotation from the first state to the second state is 90 degrees.

[0061] This arrangement makes it easy to make more areas of the redirecting portion 21 located on the light emitting path, thereby making it easy to obtain a heating spot with a larger coverage area on the welding plane A; and rotating 90 degrees is easy to control, which can increase the operational convenience of the laser welding device.

[0062] In other embodiments, in order to achieve switching between the first state and the second state, the composite mirror may be controlled to rotate 90 degrees in a plane perpendicular to the light output path, which will not be described in detail here.

[0063] In other embodiments, in order to achieve the switching between the first state and the second state, the laser generator can also be controlled to rotate a first angle in a plane perpendicular to the light-emitting optical path, and the first angle is an acute angle (for example, 30°, 38°, 45°, 60°, 69°, 80°, etc.) to achieve the switching between the first state and the second state. For example, in an application scenario, in the first state, the first direction is parallel to the third direction, and only the focusing part is located on the light-emitting optical path of the laser generator; in the second state, the first direction is arranged to intersect with the second direction and the third direction, and the focusing part and the redirecting part are simultaneously located on the light-emitting optical path of the laser generator.

[0064] The beam size of the laser passing through the redirecting portion 21 can be adjusted by controlling the specific angle value of the acute angle, thereby adjusting the size of the heating spot on the welding plane A; further, the position of the light output path of the laser passing through the redirecting portion 21 can be adjusted by controlling the specific angle value of the acute angle, thereby adjusting the position of the heating spot on the welding plane A, thereby improving the flexibility of use of the laser welding device.

[0065] In some embodiments, the redirecting portion 21 and the focusing portion 22 are integrally formed.

[0066] This arrangement has a simple structure and is convenient for assembly and production of the laser welding device.

[0067] In some embodiments, the redirecting portion 21 and the focusing portion 22 are arranged along the first direction x and are connected to each other.

[0068] This arrangement can more easily adjust whether the redirecting portion 21 and the focusing portion 22 are located on the light output path by changing the relative position between the composite mirror 20 and the laser generator 10, and is convenient for improving the structural integration of the composite mirror 20 and reducing the size. For example, in an application scenario, the redirecting portion 21 includes a first redirecting portion 211 and a second redirecting portion 212, and the first redirecting portion 211, the focusing portion 22, and the second redirecting portion 212 are sequentially arranged along the first direction x and are connected.

[0069] In some embodiments, the redirecting portion 21 and the focusing portion 22 may be separately provided, and the connection between the redirecting portion 21 and the focusing portion 22 may be achieved by a conventional connection structure such as adhesive, without specific limitation.

[0070] In some embodiments, the redirecting portion 21 includes a planar refractive portion, which facilitates setting the position of the heating spot on the welding plane A.

[0071] In other embodiments, the redirecting portion includes a curved refractive portion. The refraction angle of the laser beam passing through the redirecting portion can be adjusted by adjusting the curvature of the curved refractive portion, thereby adjusting the position and size of the heating spot on the welding plane.

[0072] In other embodiments, the redirecting portion includes a curved refractive portion and a flat refractive portion, for example, the first redirecting portion includes a flat refractive portion, and the second redirecting portion includes a curved refractive portion, etc., and the specific details are not limited. For example, in an application scenario, the first redirecting portion and the second redirecting portion can be arranged in contact with the focusing portion, and the first redirecting portion is arranged on the side of the focusing portion where the second redirecting portion is arranged, and the first redirecting portion and the second redirecting portion are arranged in contact with each other; wherein the first redirecting portion includes a flat refractive portion, and the second redirecting portion includes a curved refractive portion. That is, the position, size, shape, etc. of the heating spot can be adjusted by adjusting the position and structure of the first redirecting portion and the second redirecting portion.

[0073] For example, in some application scenarios, a first redirecting portion, a focusing portion, and a second redirecting portion can be arranged in sequence along the first direction, and the first redirecting portion and the second redirecting portion can be arranged along a direction perpendicular to the first direction and the light output path; wherein the first direction is perpendicular to the light output path.

[0074] Different from the prior art, the laser welding device of the present application includes a laser generator and a composite mirror. The composite mirror includes a redirecting part and a focusing part. At least one of the redirecting part and the focusing part is located on the light output path of the laser generator, so that the laser welding device can form a heating spot and a welding spot as needed, thereby improving the flexibility of use of the laser welding device. Furthermore, the present embodiment can realize the shaping of the laser emitted by the laser generator to form a heating spot and a welding spot through a composite mirror. The structure is simple and easy to assemble and use. It can effectively reduce the assembly complexity of the laser welding device and improve the flexibility of use of the laser welding device.

[0075] It is worth noting that the drawings in this article are only intended to illustrate the structural relationship and connection relationship of the product of the present application, and do not limit the specific structural dimensions of the product of the present application.

[0076] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A laser welding device, characterized in that: include: A laser generator, used for emitting laser light; A composite mirror, located at the light-emitting side of the laser generator, the composite mirror comprising a redirecting portion and a focusing portion, at least one of the redirecting portion and the focusing portion being located on the light-emitting optical path of the laser generator; The laser light passing through the focusing portion forms a welding spot on the welding plane, and the laser light passing through the redirecting portion forms a heating spot on the welding plane.

2. The laser welding device according to claim 1, characterized in that: The refraction direction of the laser by the redirecting portion is inclined toward the focal line of the focusing portion, so that the welding spot and the heating spot are partially overlapped or connected.

3. The laser welding device according to claim 1, characterized in that: The redirecting portion and the focusing portion are arranged along a first direction, and the first direction is perpendicular to the light output path; the laser welding device further includes: A rotating assembly connected to the laser generator or the compound mirror, driving the laser generator or the compound mirror to rotate in a plane perpendicular to the light output path, so that the laser generator and the compound mirror move relative to each other, so as to switch between the first state and the second state; Wherein, in the first state, only the focusing portion is located on the light-emitting optical path; In the second state, the redirecting portion and the focusing portion are both located on the light-emitting optical path.

4. The laser welding device according to claim 2, characterized in that: The redirecting portion includes a first redirecting portion and a second redirecting portion, and the first redirecting portion and the second redirecting portion are located at two opposite sides of the focusing portion.

5. The laser welding device according to claim 4, characterized in that: The laser light passing through the first redirecting portion and the second redirecting portion respectively forms a first heating spot and a second heating spot on the welding plane, and the first heating spot and the second heating spot are partially overlapped or connected.

6. The laser welding device according to claim 3, characterized in that: The first size of the laser spot of the composite mirror along the second direction of the laser emitted by the laser generator is greater than the second size of the laser spot along the third direction; the second direction is perpendicular to the third direction, and the second direction and the third direction are parallel to the plane; In the first state, the first direction is parallel to the third direction, the first size is smaller than or equal to the size of the focusing portion along the second direction, and the second size is smaller than or equal to the size of the focusing portion along the third direction; In the second state, the first direction is parallel to the second direction, the first size is larger than a size of the focusing portion along the second direction, and the second size is smaller than or equal to a size of the focusing portion along the third direction.

7. The laser welding device according to claim 1, characterized in that: The redirecting portion includes a curved refractive portion and / or a flat refractive portion.

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