A method for selecting a laser spot acting position for laser welding of an amorphous alloy foil

Abstract

The application discloses a laser spot action position selection method for laser welding of amorphous alloy foil, comprising the following steps: constructing corresponding geometric models based on the sizes of the amorphous alloy foil, the base and the side part; calculating corresponding joint temperatures at the laser action positions where the laser beam edges irradiate the joint and the multiple laser action positions where the laser beam can irradiate the joint according to the corresponding geometric models and a predetermined temperature calculation equation; and selecting the corresponding laser spot action position as the target laser spot action position according to the highest joint temperature among all the joint temperatures. The application can determine the most suitable or optimal laser spot action position, thereby effectively inhibiting the crystallization behavior of the heat-affected zone and the molten pool area, better enabling the molten metal to bypass the crystallization temperature interval during the cooling process, re-solidifying into an amorphous state or maintaining part of the amorphous structure, and guaranteeing that the amorphous alloy maintains excellent performances such as high strength and high elasticity.

Description

Technical Field

[0001] This application relates to the technical field of amorphous alloy joining, and more specifically, to a method for selecting the laser spot position in laser welding of amorphous alloy foil. Background Technology

[0002] Amorphous alloys are a class of novel metallic materials that achieve long-range disordered atomic arrangements by suppressing crystal nucleus formation and growth through rapid solidification technology. Due to their unique microstructure, amorphous alloys possess high strength, high hardness, excellent elastic strain limit, and good corrosion resistance, making them promising for applications in aerospace, precision machinery, biomedicine, and consumer electronics. However, amorphous alloys have intrinsic limitations in thermal stability; their structure is inherently metastable and thermodynamically prone to transitioning to a crystalline state. When the temperature exceeds the glass transition temperature, atomic mobility significantly increases; if further heated above the crystallization temperature and maintained for a sufficient time, irreversible crystallization occurs, leading to the loss of the amorphous phase and a sharp degradation or even disappearance of excellent properties such as high strength and high elasticity. Therefore, the bonding and forming of amorphous alloys faces a core challenge: how to achieve metallurgical bonding while effectively suppressing crystallization behavior in the heat-affected zone and molten pool region.

[0003] Laser welding boasts significant advantages such as high energy density, controllable heat input, rapid heating and cooling rates, and a narrow heat-affected zone, making it considered the most promising technological path for achieving high-quality joining of amorphous alloys. By precisely controlling process parameters such as laser power, scanning speed, and defocusing amount, it is possible to satisfy the kinetic conditions of "rapid heating-rapid cooling" during the molten pool formation process. This allows the molten metal to bypass the crystallization temperature range during cooling, resolidifying into an amorphous state or maintaining a partially amorphous structure. The laser spot position determines the spatial distribution pattern of laser energy on the workpiece, directly affecting the geometry of the molten pool, temperature field distribution, melt flow behavior, and cooling rate. Consequently, it has a decisive impact on the degree of crystallization, defect formation, and mechanical properties of the amorphous alloy welded joint. Currently, in the connection between amorphous alloy foil and the sidewall of the component, the selection of the laser spot application position mostly relies on the experience of the staff. However, this method often makes it difficult to select a suitable or optimal laser spot application position, which is difficult to effectively suppress the crystallization behavior of the heat-affected zone and the molten pool area. It is also difficult to make the molten metal bypass the crystallization temperature range during the cooling process and resolidify into an amorphous state or maintain a partial amorphous structure. This can easily lead to the loss of the amorphous phase, which in turn causes the excellent properties such as high strength and high elasticity to degrade or even disappear rapidly. Summary of the Invention

[0004] The purpose of this application is to provide a method for selecting the laser spot position in laser welding of amorphous alloy foil. This method can determine the most suitable or optimal laser spot position in the connection between the amorphous alloy foil and the side wall of the side component, thereby effectively suppressing the crystallization behavior of the heat-affected zone and the molten pool region. This allows the molten metal to bypass the crystallization temperature range during the cooling process and resolidify into an amorphous state or maintain a partial amorphous structure, ensuring that the amorphous alloy maintains excellent properties such as high strength and high elasticity.

[0005] To achieve the above objectives, this application provides a method for selecting the laser spot position in laser welding of amorphous alloy foil, used for connecting the amorphous alloy foil to the sidewall of a side component. The amorphous alloy foil is disposed on a substrate, the substrate has a side component, and a seam is formed between the amorphous alloy foil and the sidewall of the side component. The method includes: Based on the dimensions of the amorphous alloy foil, the substrate, and the side components, a corresponding geometric model is constructed. Based on the corresponding geometric model and the predetermined temperature calculation equation, the corresponding joint temperature is calculated at the laser action position where the laser beam edge irradiates the joint and at multiple laser action positions where the laser beam can irradiate the joint. Based on the highest joint temperature among all joint temperatures, the corresponding laser spot location is selected as the target laser spot location.

[0006] In a preferred embodiment of this application, the predetermined temperature calculation equation is as follows: in, The joint temperature is the reduction temperature. This refers to the temperature at which heat is conducted. This indicates the laser irradiation position where the focal plane of the laser beam is located on the surface of the amorphous alloy foil. This indicates the position of the laser beam's effect where the edge of the laser beam strikes the seam. This indicates the location of the highest laser effect in the irradiated area when the laser beam irradiates the seam. The distance from the focal spot is the distance from the focal spot. This is the maximum defocus distance; To reduce power, The reduced time for the laser to reach its peak temperature. To reduce the width of the pulse, For integration variables, To reduce the radius, To reduce the depth; The radius of the beam. The focal radius of the beam. For Ruili length, This is the distance from the central axis of the beam to the side wall of the side component.

[0007] In a preferred embodiment of this application, the power is reduced. ,in, For laser absorption rate, , Thermal conductivity, For reference temperature; Reduction time for laser to reach peak temperature , where τ is the time it takes for the laser temperature to reach its peak temperature; Reduced pulse width ,in, This refers to the laser pulse width. Reduced radius ,in, The radius of the laser beam; Reduction depth ,in, This represents the distance the light beam travels.

[0008] In a preferred embodiment of this application, the thermal conductivity temperature Without calculation, heat conduction temperature Used to indicate that the laser comes from Location to Changes in temperature due to thermal conduction at location.

[0009] In a preferred embodiment of this application, the laser beam can irradiate multiple laser action positions of the joint, and adjacent laser action positions are separated by a predetermined interval distance.

[0010] In a preferred embodiment of this application, selecting the corresponding laser spot action position as the target laser spot action position based on the highest joint temperature among all joint temperatures includes: Based on the highest seam temperature among all seam temperatures, select the corresponding spot defocus distance as the target spot defocus distance; Based on the defocus distance of the target laser spot, the corresponding laser spot action position is determined as the target laser spot action position.

[0011] In a preferred embodiment of this application, determining the corresponding laser spot position as the target laser spot position based on the defocus distance of the target laser spot includes: Based on the defocus distance of the target spot, determine the target distance from the beam centerline to the side wall of the side component; The target laser spot location is determined based on the distance between the beam's central axis and the target's sidewall.

[0012] In a preferred embodiment of this application, selecting the corresponding spot defocus distance as the target spot defocus distance based on the highest seam temperature among all seam temperatures includes: Based on the temperature of all seams and the corresponding defocus distance of the light spot, plot the corresponding defocus-temperature change curve; Based on the highest seam temperature among all seam temperatures, select the corresponding spot defocus distance as the target spot defocus distance.

[0013] In a preferred embodiment of this application, when determining the target distance from the beam centerline to the sidewall of the side component based on the target spot defocus distance, the distance is calculated using the following equation: in, , The focal radius of the beam. The distance from the focal spot is the distance from the focal spot. The maximum defocus distance, The length is for Ruili.

[0014] This application discloses a method for selecting the laser spot position in laser welding of amorphous alloy foils, which, compared with existing technologies, has at least the following advantages: In the connection between amorphous alloy foil and the sidewall of a side component, this application, based on a constructed geometric model and a predetermined temperature calculation equation, calculates the corresponding joint temperature at the laser action position where the laser beam edge irradiates the joint and at multiple laser action positions where the laser beam can irradiate the joint. Using the highest joint temperature among all joint temperatures, the corresponding laser spot action position is selected as the target laser spot action position. This allows for the selection of a highly suitable or optimal laser spot action position. The amorphous alloy foil is then connected to the sidewall of the side component via laser welding based on this laser spot action position. This effectively suppresses crystallization behavior in the heat-affected zone and molten pool region, allowing the molten metal to bypass the crystallization temperature range during cooling and resolidify into an amorphous state or maintain a partially amorphous structure. This ensures that the amorphous alloy maintains its high strength, high elasticity, and other excellent properties, thus maintaining the stability of the amorphous alloy's performance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic flowchart of a method for selecting the laser spot position in laser welding of amorphous alloy foil provided in an embodiment of this application; Figure 2This is a schematic diagram of the geometric model of the amorphous alloy foil, substrate, and side components provided in the embodiments of this application; Figure 3 This is a schematic diagram of the geometric model provided in the embodiments of this application at different laser action positions; Figure 4 This is a temperature change curve provided in the embodiments of this application.

[0017] Reference numerals: 1. Amorphous alloy foil; 2. Substrate; 3. Laser beam; 4. Side component. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0020] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0021] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0023] See Figure 1 , Figure 1 This is a schematic flowchart illustrating a method for selecting the laser spot position in laser welding of amorphous alloy foil, as provided in an embodiment of this application.

[0024] This application provides a method for selecting the laser spot position in laser welding of amorphous alloy foil, used for connecting the amorphous alloy foil to the sidewall of a side component. The amorphous alloy foil is disposed on a substrate, the substrate has a side component, and a seam exists between the amorphous alloy foil and the sidewall of the side component. For details, please refer to... Figure 2 The diagram shows a geometric model of the amorphous alloy foil, the substrate, and the side components. The side components can be integrally formed with the substrate, or they can be additional components set on the substrate.

[0025] A method for selecting the laser spot position in laser welding of amorphous alloy foil according to an embodiment of this application includes the following steps: S110, based on the dimensions of the amorphous alloy foil, the substrate, and the side components, constructs the corresponding geometric model; S120, based on the corresponding geometric model and the predetermined temperature calculation equation, the corresponding joint temperature is calculated at the laser action position where the laser beam edge irradiates the joint and at multiple laser action positions where the laser beam can irradiate the joint. S130: Select the corresponding laser spot action position as the target laser spot action position based on the highest joint temperature among all joint temperatures.

[0026] In this embodiment, the relevant dimensions of the constructed geometric model of the amorphous alloy foil, substrate, and side components can correspond to the dimensions of the amorphous alloy foil, substrate, and side components, or they can be in a corresponding proportional relationship. In this embodiment, the relevant dimensions of the constructed geometric model of the amorphous alloy foil, substrate, and side components correspond to the dimensions of the amorphous alloy foil, substrate, and side components.

[0027] Understandably, the laser action position where the edge of the laser beam irradiates the seam is the laser action position when one edge of the laser beam just happens to irradiate the seam; multiple laser action positions where the laser beam can irradiate the seam are multiple different laser action positions where the laser beam can irradiate the seam, wherein the height of the irradiated area corresponding to different laser action positions when the laser beam irradiates the seam is different; for this, see [reference needed]. Figure 3 The diagram shows the geometric model at different laser irradiation positions. Figure 3 These are comparison images of different laser irradiation positions, with geometric models of the amorphous alloy foil, substrate, and side components. Figure 2 For the sake of accuracy, among which, This indicates the laser irradiation position where the focal plane of the laser beam is located on the surface of the amorphous alloy foil. This indicates the position of the laser beam's effect where the edge of the laser beam strikes the seam. This indicates the location of the highest laser effect in the irradiated area when the laser beam irradiates the seam. Indicates in Changes in position and out-of-focus position.

[0028] In this embodiment, a seam temperature is calculated corresponding to the laser action position where the laser beam irradiates the seam at the edge; if there are ten laser action positions that the laser beam can irradiate the seam, then ten seam temperatures are calculated accordingly.

[0029] In this embodiment, after the highest joint temperature among all joint temperatures is determined, the laser spot action position corresponding to the highest joint temperature can also be determined. Then, the laser spot action position corresponding to the highest joint temperature is taken as the target laser spot action position, which is the laser beam spot action position during laser welding.

[0030] The laser spot action position selection method for laser welding of amorphous alloy foil in this application embodiment, in the connection between amorphous alloy foil and the side wall of the side component, is based on the constructed geometric model and the predetermined temperature calculation equation. The corresponding joint temperature is calculated at the laser action position where the laser beam edge irradiates the joint and at multiple laser action positions where the laser beam can irradiate the joint. The highest joint temperature among all joint temperatures is selected as the target laser spot action position. This allows for the selection of a highly suitable or optimal laser spot action position. The amorphous alloy foil is then connected to the side wall of the side component via laser welding based on this laser spot action position. This effectively suppresses the crystallization behavior of the heat-affected zone and the molten pool region, allowing the molten metal to bypass the crystallization temperature range during cooling and resolidify into an amorphous state or maintain a partially amorphous structure. This ensures that the amorphous alloy maintains its high strength, high elasticity, and other excellent properties, thus maintaining the stability of the amorphous alloy's performance.

[0031] In this embodiment, the predetermined temperature calculation equation is as follows: in, The seam temperature is the reduction temperature; This refers to the temperature at which heat is conducted. This indicates the laser irradiation position where the focal plane of the laser beam is located on the surface of the amorphous alloy foil. This indicates the position of the laser beam's effect where the edge of the laser beam strikes the seam. This indicates the location of the highest laser effect in the irradiated area when the laser beam irradiates the seam. The distance from the focal spot is the distance from the focal spot. This is the maximum defocus distance; To reduce power, The reduced time for the laser to reach its peak temperature. To reduce the width of the pulse, For integration variables, To reduce the radius, To reduce the depth; The radius of the beam. The focal radius of the beam. For Ruili length, This is the distance from the central axis of the beam to the side wall of the side component. Indicates from , Indicates from .

[0032] Specifically, for some of the parameters mentioned above, please refer to [link / reference]. Figure 3 The parameters indicated include, among which, the seam temperature is expressed as a simplified temperature, and the thermal conductivity temperature... That is, in Position Temperature at the location.

[0033] Furthermore, reduce power ,in, For laser absorption rate, , Thermal conductivity, For reference temperature, laser absorption rate Thermal conductivity For known quantities, the reference temperature is... ; Reduction time for laser to reach peak temperature Where τ is the time it takes for the laser temperature to reach its peak temperature; Reduced pulse width ,in, Let the laser pulse width be a known quantity. Reduced radius ,in, The radius of the laser beam; Reduction depth ,in, The distance the light beam travels; Ruili Length The time it takes for the laser temperature to reach its peak can be calculated using the corresponding formula based on the relevant laser process parameters. The calculation formula is an existing one, so it will not be elaborated here. Thermal conductivity temperature Without calculation, heat conduction temperature Used to indicate that the laser comes from Location to Changes in temperature due to thermal conduction at a location; Beam radius Distance between the beam's central axis and the side wall of the side component The calculation formula is used in conjunction with reduced power. Reduced radius Reduction depth Calculation formula solution Location reduction temperature .

[0034] It should be noted that the temperature calculated by this temperature calculation equation is the temperature at the end of the laser pulse, denoted as T. end* ,yes =0, The peak temperature at =0, but as The increase in peak temperature may be accompanied by a lag, and the actual peak temperature may be later. - Obtained within the specified time frame.

[0035] Using the aforementioned predetermined temperature calculation equation, the corresponding seam temperature can be calculated relatively accurately, and thus the target laser spot action position can be accurately selected from the highest seam temperature among all seam temperatures.

[0036] Preferably, the laser beam can irradiate multiple laser action positions of the joint, and adjacent laser action positions are separated by a predetermined interval distance.

[0037] In one embodiment, selecting the laser spot location as the target laser spot location based on the highest seam temperature among all seam temperatures may include the following steps: Based on the highest seam temperature among all seam temperatures, select the corresponding spot defocus distance as the target spot defocus distance; Based on the defocus distance of the target laser spot, the corresponding laser spot action position is determined as the target laser spot action position.

[0038] Understandably, different seam temperatures have corresponding spot defocus distances. Once the highest seam temperature is determined, the spot defocus distance corresponding to the highest seam temperature can be determined, which also means the target spot defocus distance can be determined.

[0039] Furthermore, selecting the corresponding defocus distance of the light spot as the target defocus distance based on the highest seam temperature among all seam temperatures can include the following steps: Based on the temperature of all seams and the corresponding defocus distance of the light spot, plot the corresponding defocus-temperature change curve; Based on the highest seam temperature among all seam temperatures, select the corresponding spot defocus distance as the target spot defocus distance.

[0040] Specifically, see Figure 4 The temperature change curve, where, Figure 4 (a) shows the temperature-defocus curve of the amorphous alloy foil at the corresponding beam radius position. Figure 4 (b) shows the defocus-temperature change curve at the seam location. The defocus-temperature change curve is plotted based on the temperature of all seams and the corresponding defocus distance of the light spot. Figure 4 The curve shown in (b) passes through Figure 4 (b) It can be seen that the focal distance of the light spot corresponding to the highest seam temperature is about 3.25 mm.

[0041] Furthermore, based on the defocus distance of the target laser spot, the corresponding laser spot position is determined as the target laser spot position, including: Based on the defocus distance of the target spot, determine the target distance from the beam centerline to the side wall of the side component; The target laser spot location is determined based on the distance between the beam's central axis and the target's sidewall.

[0042] For example, when determining the target distance from the beam centerline to the sidewall of the side component based on the target spot defocus distance, it is calculated using the following equation: in, , The focal radius of the beam. The distance from the focal spot is the distance from the focal spot. The maximum defocus distance, The length is for Ruili.

[0043] Using the above method, it is easy to determine the corresponding laser spot action position as the target laser spot action position by using the highest seam temperature, and the corresponding laser spot action position can be accurately calculated as the target laser spot action position.

[0044] In all the above embodiments, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0045] It should be understood that phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0046] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0047] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A method for selecting the laser spot position in laser welding of amorphous alloy foil, characterized in that, For connecting amorphous alloy foil to the sidewall of a side component, the amorphous alloy foil is disposed on a substrate, the substrate is provided with a side component, and a seam is formed between the amorphous alloy foil and the sidewall of the side component, the method includes: Based on the dimensions of the amorphous alloy foil, the substrate, and the side components, a corresponding geometric model is constructed. Based on the corresponding geometric model and the predetermined temperature calculation equation, the corresponding joint temperature is calculated at the laser action position where the laser beam edge irradiates the joint and at multiple laser action positions where the laser beam can irradiate the joint. Based on the highest joint temperature among all joint temperatures, the corresponding laser spot location is selected as the target laser spot location.

2. The method for selecting the laser spot position in laser welding of amorphous alloy foil according to claim 1, characterized in that, The predetermined temperature calculation equation is as follows: in, The joint temperature is the reduction temperature. This refers to the temperature at which heat is conducted. This indicates the location of the laser beam focal plane on the surface of the amorphous alloy foil, where the laser beam's focal plane is positioned. This indicates the position of the laser beam's effect where the edge of the laser beam strikes the seam. This indicates the location of the highest laser effect in the irradiated area when the laser beam irradiates the seam. The distance from the focal spot is the distance from the focal spot. This is the maximum defocus distance; To reduce power, The reduced time for the laser to reach its peak temperature. To reduce the width of the pulse, For integration variables, To reduce the radius, To reduce the depth; The radius of the beam. The focal radius of the beam. For Ruili length, This is the distance from the central axis of the beam to the side wall of the side component.

3. The method for selecting the laser spot position in laser welding of amorphous alloy foil according to claim 2, characterized in that, Reduced power ,in, For laser absorption rate, , Thermal conductivity, For reference temperature; Reduction time for laser to reach peak temperature , where τ is the time it takes for the laser temperature to reach its peak temperature; Reduced pulse width ,in, This refers to the laser pulse width. Reduced radius ,in, The radius of the laser beam; Reduction depth ,in, This represents the distance the light beam travels.

4. The method for selecting the laser spot position in laser welding of amorphous alloy foil according to claim 2, characterized in that, Thermal conductivity temperature Without calculation, heat conduction temperature Used to indicate laser from Location to Changes in temperature due to thermal conduction at location.

5. The method for selecting the laser spot position in laser welding of amorphous alloy foil according to claim 1, characterized in that, The laser beam can irradiate multiple laser action positions of the joint, with adjacent laser action positions separated by a predetermined interval distance.

6. The method for selecting the laser spot position in laser welding of amorphous alloy foil according to claim 1, characterized in that, The step of selecting the laser spot action position as the target laser spot action position based on the highest joint temperature among all joint temperatures includes: Based on the highest seam temperature among all seam temperatures, select the corresponding spot defocus distance as the target spot defocus distance; Based on the defocus distance of the target laser spot, the corresponding laser spot action position is determined as the target laser spot action position.

7. The method for selecting the laser spot position in laser welding of amorphous alloy foil according to claim 6, characterized in that, The step of determining the corresponding laser spot position as the target laser spot position based on the defocus distance of the target laser spot includes: Based on the defocus distance of the target spot, determine the target distance from the beam centerline to the side wall of the side component; The target laser spot location is determined based on the distance between the beam's central axis and the target's sidewall.

8. The method for selecting the laser spot position in laser welding of amorphous alloy foil according to claim 6, characterized in that, The step of selecting the corresponding defocus distance of the light spot as the target defocus distance based on the highest seam temperature among all seam temperatures includes: Based on the temperature of all seams and the corresponding defocus distance of the light spot, plot the corresponding defocus-temperature change curve; Based on the highest seam temperature among all seam temperatures, select the corresponding spot defocus distance as the target spot defocus distance.

9. The method for selecting the laser spot position in laser welding of amorphous alloy foil according to claim 7, characterized in that, When determining the target distance from the beam centerline to the sidewall of the side component based on the defocus distance of the target spot, the following equation is used for calculation: in, , The focal radius of the beam. The distance from the focal spot is the distance from the focal spot. The maximum defocus distance, The length is for Ruili.

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