Multi-galvanometer segmented synchronous laser welding method, device and equipment

Abstract

The invention discloses a multi-galvanometer segmented synchronous laser welding method, device and equipment, and relates to the technical field of laser welding, the device comprises a multi-galvanometer module, a laser source, a control unit and a clamp platform, a to-be-welded workpiece is arranged on the clamp platform, the to-be-welded workpiece comprises a plurality of welding sub-areas, the multi-galvanometer module comprises a plurality of galvanometers, and the laser source is arranged on the multi-galvanometer module; different welding sub-areas correspond to different galvanometers respectively; the control unit distributes independent process parameters to the galvanometers corresponding to the welding sub-areas in the workpiece to be welded; acquiring a welding path of each welding sub-region in the to-be-welded workpiece; and a plurality of galvanometers with independent process parameters are synchronously controlled, laser output by the laser source is guided to the welding paths of the corresponding welding sub-areas, and segmented laser welding is conducted on the to-be-welded workpiece. In this way, the multiple galvanometers are used for being responsible for different welding areas of the same workpiece, and independent parameter setting, synchronous control and real-time closed-loop monitoring of the galvanometers can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser welding, in particular to a multi-mirror segmented synchronous laser welding method, device and equipment. BACKGROUND

[0002] Laser welding has been widely used in industrial manufacturing due to its high energy density, non-contact processing and other advantages. The existing technology mainly uses single mirror or multi-beam laser beam to realize welding, which has the following disadvantages: single mirror or multi-beam beam combining method can only perform welding with unified parameters on the same working surface, and it is difficult to set process parameters such as power and speed for different regions of the same workpiece; segmented welding is mostly in the form of path segmentation, but lacks synchronous control of each independent mirror, resulting in limited welding efficiency and precision; real-time quality monitoring is mostly limited to the detection of the whole weld, lacks closed-loop feedback for each welding sub-region, and it is difficult to realize regional quality control.

[0003] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0004] The main purpose of the present application is to provide a multi-mirror segmented synchronous laser welding method, device and equipment, which aims to solve the technical problem that the traditional laser welding in the prior art cannot realize independent parameter setting and synchronous control for different regions of the same workpiece.

[0005] To achieve the above-mentioned purpose, the present application provides a multi-mirror segmented synchronous laser welding device, which comprises a multi-mirror module, a laser source, a control unit and a fixture platform, a workpiece to be welded is arranged on the fixture platform, the workpiece to be welded comprises a plurality of welding sub-regions, the multi-mirror module comprises a plurality of mirrors, different welding sub-regions correspond to different mirrors, and the control unit performs the following steps: Assigning independent process parameters to the mirrors corresponding to each welding sub-region in the workpiece to be welded; Obtaining the welding path of each welding sub-region in the workpiece to be welded; Synchronously controlling a plurality of mirrors with independent process parameters, guiding the laser output by the laser source to the welding path of the corresponding welding sub-region, and performing segmented laser welding on the workpiece to be welded.

[0006] In an embodiment, each mirror is provided with an independent driving unit, a power adjusting unit and a focal length adjusting unit; The driving unit is used to receive the control instruction sent by the control unit and drive the corresponding mirror to respond to the control instruction; The power adjusting unit is used to adjust the power of the corresponding mirror based on the process parameters; The focal length adjusting unit is configured to adjust the height of the laser focal point of the corresponding galvanometer.

[0007] In an embodiment, each galvanometer has a hot-plug function, and each galvanometer is arranged at a preset optimal installation position of the corresponding welding sub-region.

[0008] In an embodiment, the laser source is a single light source, and the laser output by the single light source is distributed to each galvanometer through a beam splitter.

[0009] In an embodiment, the laser source is a plurality of light sources, each galvanometer corresponds to at least one light source, and the laser output by the plurality of light sources is coupled and transmitted to the corresponding galvanometer.

[0010] In an embodiment, the device further comprises a monitoring unit; The monitoring unit is configured to collect welding quality data of each welding sub-region in the workpiece to be welded and feed back the welding quality data to the control unit. The control unit is configured to determine a deviation sub-region based on the welding quality data of each welding sub-region in the workpiece to be welded, and adjust the process parameters of the corresponding galvanometer of the deviation sub-region.

[0011] In addition, to achieve the above-mentioned purpose, the present application further provides a multi-galvanometer segmented synchronous laser welding method, which comprises: allocating independent process parameters to the corresponding galvanometer of each welding sub-region in the workpiece to be welded; obtaining the welding path of each welding sub-region in the workpiece to be welded; synchronously controlling a plurality of galvanometers with independent process parameters, guiding the laser output by the laser source to the welding path of the corresponding welding sub-region, and performing segmented laser welding on the workpiece to be welded.

[0012] In an embodiment, the step of allocating independent process parameters to the corresponding galvanometer of each welding sub-region in the workpiece to be welded comprises: obtaining welding influencing factors of each welding sub-region in the workpiece to be welded, the welding influencing factors at least including material, thickness and size; allocating independent process parameters to the corresponding galvanometer of each welding sub-region in the workpiece to be welded based on the welding influencing factors of each welding sub-region in the workpiece to be welded, the process parameters at least including power, speed and pulse width.

[0013] In an embodiment, the step of synchronously controlling a plurality of galvanometers with independent process parameters, guiding the laser output by the laser source to the welding path of the corresponding welding sub-region, and performing segmented laser welding on the workpiece to be welded further comprises: acquire welding quality data of each welding sub-region in the workpiece to be welded, the welding quality data at least including weld geometry data, fusion state data, defect detection data and process stability data; determine a deviation sub-region based on the welding quality data of each welding sub-region in the workpiece to be welded; adjust the process parameters of the galvanometer corresponding to the deviation sub-region.

[0014] In addition, to achieve the above-mentioned purpose, the present application also provides a multi-galvanometer segmented synchronous laser welding device, which comprises the multi-galvanometer segmented synchronous laser welding apparatus as described above.

[0015] In addition, to achieve the above-mentioned purpose, the present application also provides a storage medium, which is a computer readable storage medium, and a computer program is stored on the storage medium, and the computer program is executed by a processor to implement the steps of the multi-galvanometer segmented synchronous laser welding method as described above.

[0016] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the steps of the multi-galvanometer segmented synchronous laser welding method as described above.

[0017] The present application provides a multi-galvanometer segmented synchronous laser welding apparatus, which comprises a multi-galvanometer module, a laser source, a control unit and a fixture platform, a workpiece to be welded is arranged on the fixture platform, the workpiece to be welded comprises a plurality of welding sub-regions, the multi-galvanometer module comprises a plurality of galvanometers, and different welding sub-regions correspond to different galvanometers; the control unit allocates independent process parameters for the galvanometers corresponding to each welding sub-region in the workpiece to be welded; the welding paths of each welding sub-region in the workpiece to be welded are acquired; the plurality of galvanometers with independent process parameters are synchronously controlled, the laser output by the laser source is guided to the welding paths of the corresponding welding sub-regions, and the workpiece to be welded is subjected to segmented laser welding. The present application uses a plurality of galvanometers to be responsible for different welding regions of the same workpiece, each galvanometer can independently set process parameters, optimal welding of different materials or thickness regions is realized, and the plurality of galvanometers are controlled to work synchronously, so that the overall welding time can be effectively shortened and the welding efficiency can be improved. In addition, the welding sub-regions are monitored in real time, the process parameters are adjusted to ensure the welding quality, the weld defect rate can be effectively reduced, and the technical problems that the traditional laser welding is difficult to realize independent parameter setting and synchronous control of different regions of the same workpiece are solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate one embodiment consistent with the present application and, together with the description, serve to explain the principles of the application.

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings are only for the purpose of illustrating the embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative labor.

[0020] Figure 1 Flowchart of the embodiment one of the multi-mirror segmented synchronous laser welding device of the present application. Figure 2 Welding sub-area schematic diagram of the multi-mirror segmented synchronous laser welding device provided by the embodiment of the present application. Figure 3 Multi-mirror schematic diagram of the multi-mirror segmented synchronous laser welding device provided by the embodiment of the present application. Figure 4 Flowchart of the embodiment one of the multi-mirror segmented synchronous laser welding method of the present application.

[0021] Explanation of the reference signs: 10, multi-mirror module; 20, laser source; 30, control unit; 40, clamp platform; 50, workpiece to be welded.

[0022] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0023] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application, and are not used to limit the present application.

[0024] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the accompanying drawings and specific embodiments.

[0025] The main solution of the embodiment of the present application is that the control unit distributes independent process parameters to the mirrors corresponding to each welding sub-area in the workpiece to be welded; obtains the welding path of each welding sub-area in the workpiece to be welded; synchronously controls the multiple mirrors with independent process parameters, guides the laser output by the laser source to the welding path of the corresponding welding sub-area, and performs segmented laser welding on the workpiece to be welded.

[0026] Currently, existing technologies mainly use a single galvanometer or multiple laser beams for welding, which has the following shortcomings: single galvanometer or multiple beam combination methods can only perform welding with uniform parameters on the same working surface, making it difficult to set process parameters such as power and speed for different areas of the same workpiece; segmented welding often adopts a path segmentation method, but lacks synchronous control of each segment's independent galvanometer, resulting in limited welding efficiency and accuracy; real-time quality monitoring is mostly limited to the detection of the overall weld seam, lacking closed-loop feedback for each welding sub-region, making it difficult to achieve regional quality control.

[0027] This application provides a solution that uses multiple galvanometers to handle different welding areas of the same workpiece, and each galvanometer can independently set process parameters to achieve optimal welding of areas with different materials or thicknesses. In addition, the synchronous operation of multiple galvanometers effectively shortens the overall welding time and improves welding efficiency, solving the technical problem that traditional laser welding is difficult to achieve independent parameter setting and synchronous control of different areas of the same workpiece.

[0028] This application provides a multi-mirror segmented synchronous laser welding device, referring to... Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the multi-mirror segmented synchronous laser welding method of this application.

[0029] In this embodiment, the multi-mirror segmented synchronous laser welding device includes a multi-mirror module 10, a laser source 20, a control unit 30, and a fixture platform 40. The workpiece 50 to be welded is set on the fixture platform 40. The workpiece 50 to be welded includes multiple welding sub-regions. The multi-mirror module 10 includes multiple mirrors, and different welding sub-regions correspond to different mirrors.

[0030] It should be noted that the workpiece 50 to be welded is the workpiece that needs to be laser welded. The fixture platform 40 can be used to fix the workpiece 50 to be welded to ensure that the workpiece 50 to be welded can maintain its posture during the welding process.

[0031] Additionally, it should be noted that the multi-galvanometer module 10 includes at least two independent galvanometers, each with hot-swappable functionality. This means that each galvanometer can be hot-swapped, and the number of galvanometers can be flexibly expanded or reduced according to actual needs (e.g., the size of the workpiece 50 to be welded) to ensure the versatility of the device. All galvanometers can be connected to the control unit 30 via a high-speed real-time bus (e.g., EtherCAT). The area that the galvanometers can scan is the spliced ​​area, which has a relatively large scanning area.

[0032] It is understood that, in this embodiment, reference is made to... Figure 2 The workpiece 50 to be welded is divided into multiple welding sub-regions (e.g. Figure 2The sizes of the different welding sub-regions can be different, and the division is made according to actual conditions. Different welding sub-regions correspond to different galvanometers, that is, each welding sub-region has its own dedicated galvanometer, and each welding sub-region is bound to the dedicated galvanometer, so that different welding sub-regions use different galvanometers to realize laser welding, that is, each welding sub-region uses its own dedicated galvanometer to realize laser welding. For example, referring to Figure 3 , welding sub-region A corresponds to galvanometer a, welding sub-region B corresponds to galvanometer b, welding sub-region C corresponds to galvanometer c, and welding sub-region D corresponds to galvanometer d.

[0033] It should be understood that each galvanometer is arranged at a preset optimal mounting position of the corresponding welding sub-region, that is, the best mounting position, for example, the center position of the welding sub-region. The optimal position of the galvanometer can be flexibly adjusted according to the situation of the welding sub-region and the process parameters required by the galvanometer. Since different welding sub-regions can only be responsible for the corresponding galvanometer, the dedicated use can be realized, the mutual interference between the galvanometers can be avoided, and the control cost of the galvanometer can be reduced.

[0034] It should be noted that the laser source 20 can be a single light source or multiple light sources (two or more). If the laser source 20 is a single light source, for example, a single high-power laser, the laser output by the single light source is distributed to each galvanometer through a beam splitter. If the laser source 20 is a plurality of light sources, each galvanometer corresponds to at least one light source, and the laser output by the plurality of light sources is coupled to the corresponding galvanometer, that is, the multiple light sources are directly coupled to the corresponding galvanometer to realize multiple independent outputs.

[0035] In the specific implementation, the control unit 30 performs the following steps: assigning independent process parameters to the galvanometers corresponding to each welding sub-region in the workpiece to be welded; obtaining the welding paths of each welding sub-region in the workpiece to be welded; synchronously controlling the multiple galvanometers with independent process parameters, guiding the laser output by the laser source to the welding path of the corresponding welding sub-region, and performing segmented laser welding on the workpiece to be welded.

[0036] In a feasible implementation, the control unit 30 obtains welding influencing factors of each welding sub-region in the workpiece to be welded 50; and assigns independent process parameters to the galvanometers corresponding to each welding sub-region in the workpiece to be welded 50 based on the welding influencing factors of each welding sub-region in the workpiece to be welded 50.

[0037] It should be noted that in this embodiment, each galvanometer is assigned an independent process parameter. The process parameter is a related parameter used for welding, for example, power, speed, and pulse width, wherein the speed can be a scanning speed, which is not limited. The welding influencing factor is a related factor that affects welding, for example, material, thickness, and size, which is not limited.

[0038] It can be understood that the process parameters of each welding sub-area corresponding to the galvanometer are set according to factors such as the material, thickness and size of each welding sub-area. The welding path is a path formed by welding points. The control unit can automatically generate the welding path of each galvanometer corresponding to the welding sub-area based on the region division algorithm of CAD / CAE, or the corresponding parameters can be generated in advance and input to the control unit.

[0039] It can be understood that the embodiment synchronously controls the galvanometer to start, that is, all the galvanometers start at the same time, so as to strictly follow the synchronous clock strategy, ensure the synchronous collapse in the welding process of the workpiece, and ensure the welding quality. In this process, different galvanometers parallelly guide the laser output by the laser source to the welding path of the corresponding welding sub-area, so as to realize the segmented laser welding.

[0040] Further, each galvanometer is provided with an independent driving unit, a power adjusting unit and a focal length adjusting unit; the driving unit is used to receive the control instruction sent by the control unit 30 and drive the corresponding galvanometer to respond to the control instruction; the power adjusting unit is used to adjust the power of the corresponding galvanometer based on the process parameters; and the focal length adjusting unit is used to adjust the height of the laser focal point of the corresponding galvanometer.

[0041] It should be noted that the control instruction is an instruction used by the control unit 30 to control the galvanometer, for example, an instruction for synchronous starting. After the driving unit receives the control instruction sent by the control unit 30, the driving unit will drive the galvanometer to respond. In specific implementation, the control unit 30 can realize millisecond-level synchronous control of multiple galvanometers through a high-speed real-time bus.

[0042] It can be understood that the power adjusting unit adjusts the power of the galvanometer according to the allocated process parameters, the focal length adjusting unit adjusts the height of the laser focal point of the galvanometer, accurately controls the position of the laser focal point, ensures that the focal point can fall on the welding reference surface of each welding sub-area, avoids the deviation of the focal point due to the uneven surface (too close to burn through, too far to disperse energy), and adapts to the differentiated needs of multi-region welding. In addition, the focal length adjusting unit can adjust the concentration degree of laser energy density according to the welding requirements of different welding sub-areas (such as shallow fusion welding for part of the area and deep fusion welding for part of the area).

[0043] Further, the multi-galvanometer segmented synchronous laser welding device further comprises a monitoring unit; the monitoring unit is used to collect the welding quality data of each welding sub-area in the workpiece to be welded 50, and feed back the welding quality data to the control unit 30; the control unit 30 is used to determine the deviation sub-area based on the welding quality data of each welding sub-area in the workpiece to be welded 50, and adjust the process parameters of the galvanometer corresponding to the deviation sub-area.

[0044] It should be noted that the monitoring unit can be an optical sensor, a thermal imaging sensor, and the present embodiment does not make specific limitations. The welding quality data is a set of key parameters collected by the monitoring unit, reflecting the welding effect of each welding sub-region, and is the core basis for determining whether the welding is up to standard and whether the parameters need to be adjusted.

[0045] In addition, it should be noted that the welding quality data can include weld geometry data (directly reflecting the appearance and size up to standard), fusion state data (core internal quality index determining welding strength), defect detection data (identifying abnormal problems in the welding process), and process stability data (indirectly reflecting the adaptability of welding parameters). The weld geometry data can include weld width, weld height (excess height), weld width uniformity, joint gap filling rate, the fusion state data can include penetration depth (laser penetration depth of the workpiece), molten pool size, molten pool temperature distribution, heat affected zone range, the defect detection data can include pore number and size, cracks (micro-cracks / macro-cracks), slag inclusion, incomplete fusion / incomplete penetration, spatter amount, and the present embodiment does not make specific limitations.

[0046] It can be understood that the deviation sub-region is a welding sub-region with deviation, and the deviation can be measured by a set deviation index. If the deviation index of the welding sub-region is greater than the set tolerance threshold, the welding sub-region is considered as a deviation sub-region. If the deviation index of the welding sub-region is less than or equal to the set tolerance threshold, the welding sub-region is not considered as a deviation sub-region. The deviation index can be selected from the welding quality data, or other indexes can be calculated according to the welding quality data, and the present embodiment does not make specific limitations.

[0047] It should be understood that after the deviation sub-region is determined, the process parameters of the galvanometer corresponding to the deviation sub-region are adjusted to improve the welding quality, so as to realize closed-loop monitoring of each welding sub-region and realize regionalized quality control.

[0048] Further, a corresponding welding evaluation report can be generated according to the monitoring result (for example: welding quality data) of the welding sub-region.

[0049] In specific implementation, the workpiece to be welded is regionally divided to generate a sub-region set Each sub-region is assigned a corresponding galvanometer , and process parameters (power , speed , pulse width ). Start the synchronous clock, all galvanometer in the same time reference and parallel execution of the respective path scanning. Real-time monitoring of each sub-region of the welding quality data, if the deviation is immediately adjusted to the corresponding galvanometer power or scanning speed, to achieve closed-loop control. After completing all sub-regional welding, automatically perform weld quality assessment and generate a report.

[0050] In this embodiment, each galvanometer can independently set the power, speed and other process parameters to achieve optimal welding of different materials or thickness regions; multiple galvanometers work synchronously, which can reduce the overall welding time by at least 20% compared to the traditional single galvanometer segmented method; real-time regional monitoring can reduce the weld defect rate by at least 30%; the galvanometer can be hot-plugged, and the number of galvanometers can be flexibly increased or decreased according to the size of the workpiece, improving the versatility.

[0051] The embodiment provides a multi-galvanometer segmented synchronous laser welding device, which comprises a multi-galvanometer module, a laser source, a control unit and a clamp platform. The workpiece to be welded is arranged on the clamp platform, and the workpiece to be welded comprises a plurality of welding sub-regions. The multi-galvanometer module comprises a plurality of galvanometers, and different welding sub-regions correspond to different galvanometers. The control unit assigns independent process parameters to the galvanometers corresponding to each welding sub-region in the workpiece to be welded. The welding paths of each welding sub-region in the workpiece to be welded are obtained. The plurality of galvanometers with independent process parameters are synchronously controlled, the laser output by the laser source is guided to the welding path of the corresponding welding sub-region, and the workpiece to be welded is subjected to segmented laser welding. In the embodiment, a plurality of galvanometers are used to be responsible for different welding regions of the same workpiece, each galvanometer can independently set process parameters to achieve optimal welding of different materials or thickness regions, and the plurality of galvanometers are controlled to work synchronously, which can effectively shorten the overall welding time and improve the welding efficiency. In addition, the welding sub-regions are monitored in real time, the process parameters are adjusted to ensure the welding quality, and the weld defect rate can be effectively reduced.

[0052] The embodiment of the present application provides a multi-galvanometer segmented synchronous laser welding method, which refers to Figure 4 , Figure 4 The embodiment of the present application provides a multi-galvanometer segmented synchronous laser welding method, which refers to

[0053] In the embodiment, the multi-galvanometer segmented synchronous laser welding method comprises steps S10-S30: Step S10, assigning independent process parameters to the galvanometers corresponding to each welding sub-region in the workpiece to be welded; It should be noted that the embodiment is applied to the multi-mirror segmented synchronous laser welding device in the above embodiment, the multi-mirror segmented synchronous laser welding device includes a multi-mirror module, a laser source, a control unit, and a fixture platform, the workpiece to be welded is arranged on the fixture platform, the workpiece to be welded includes a plurality of welding sub-regions, the multi-mirror module includes a plurality of mirrors, and different welding sub-regions correspond to different mirrors, and the specific structure can be referred to Figure 1 , which will not be repeated here.

[0054] In addition, it should be noted that the workpiece to be welded, that is, the workpiece currently requiring laser welding, can be fixed by using the fixture platform to ensure that the workpiece to be welded can keep the same posture during welding. Each mirror has a hot plug function, that is, each mirror can be hot plugged, and the number of mirrors can be flexibly expanded / reduced according to actual needs (for example, the size of the workpiece to be welded) to ensure versatility.

[0055] It can be understood that in the embodiment, the workpiece to be welded is divided into a plurality of welding sub-regions (for example Figure 2 A, B, C, and D), and the sizes of different welding sub-regions can be different and are divided according to actual conditions. Different welding sub-regions correspond to different mirrors (which can be referred to Figure 3 ), that is, each welding sub-region has its own dedicated mirror, and each welding sub-region is bound to the dedicated mirror, so that different welding sub-regions use different mirrors to realize laser welding, that is, each welding sub-region uses its own dedicated mirror to perform laser welding.

[0056] It should be understood that each mirror is arranged at a preset optimal installation position of the corresponding welding sub-region, that is, the best installation position, for example, the center position of the welding sub-region. According to the condition of the welding sub-region and the process parameters required by the mirror, the optimal position of the mirror can be flexibly adjusted. Since different welding sub-regions can only be responsible for the corresponding mirror, the dedicated use can be realized, mutual interference between the mirrors can be avoided, and the control cost of the mirror can be reduced.

[0057] In a possible implementation, the step S10 can include: acquiring welding influencing factors of each welding sub-region in the workpiece to be welded, the welding influencing factors at least including material, thickness, and size; and assigning independent process parameters to the mirror corresponding to each welding sub-region in the workpiece to be welded based on the welding influencing factors of each welding sub-region in the workpiece to be welded, the process parameters at least including power, speed, and pulse.

[0058] It should be noted that in the embodiment, each galvanometer is assigned an independent process parameter. The process parameter is a parameter related to welding, such as power, scanning speed, and pulse width. The speed can be the scanning speed, which is not specifically limited.

[0059] In addition, it should be noted that the welding influencing factor is a factor related to welding, such as material, thickness, and size, which is not specifically limited.

[0060] It can be understood that the process parameters of the corresponding galvanometer of each welding sub-region are set according to factors such as the material, thickness, and size of each welding sub-region.

[0061] In step S20, the welding path of each welding sub-region in the workpiece to be welded is obtained. It can be understood that the welding path is a path formed by welding points. The control unit can automatically generate the welding path of each galvanometer corresponding to the welding sub-region based on the region division algorithm of CAD / CAE, or the corresponding parameters can be generated in advance and input to the control unit.

[0062] In step S30, the multiple galvanometers with independent process parameters are synchronously controlled, the laser output by the laser source is guided to the welding path of the corresponding welding sub-region, and the workpiece to be welded is subjected to segmented laser welding.

[0063] It can be understood that the embodiment synchronously controls the start of the galvanometer, that is, all galvanometers start at the same time, so as to strictly follow the synchronous clock strategy, ensure the synchronization collapse in the welding process of the workpiece, and ensure the welding quality. In this process, different galvanometers guide the laser output by the laser source to the welding path of the corresponding welding sub-region in parallel, so as to realize segmented laser welding.

[0064] It should be understood that in the specific implementation, since each galvanometer is connected to the control unit through a high-speed real-time bus (such as EtherCAT), the control unit can realize millisecond-level synchronous control of multiple galvanometers through the high-speed real-time bus.

[0065] In a possible implementation, after step S30, the method can further include: obtaining welding quality data of each welding sub-region in the workpiece to be welded, the welding quality data at least including weld geometry data, fusion state data, defect detection data, and process stability data; determining a deviation sub-region based on the welding quality data of each welding sub-region in the workpiece to be welded; and adjusting the process parameters of the galvanometer corresponding to the deviation sub-region.

[0066] It should be noted that welding quality data is a set of key parameters collected by the monitoring unit (optical sensors, thermal imaging sensors, etc.) that reflects the welding effect of each welding sub-region. It is the core basis for judging whether the welding meets the standards and whether the parameters need to be adjusted.

[0067] Additionally, it should be noted that welding quality data may include weld geometry data (directly reflecting the appearance and dimensional compliance), fusion state data (the core internal quality indicator that determines weld strength), defect detection data (identifying abnormal problems during the welding process), and process stability data (indirectly reflecting the suitability of welding parameters). Weld geometry data may include weld width, weld height (reinforcement height), weld width uniformity, and joint gap filling rate. Fusion state data may include penetration depth (the depth to which the laser penetrates the workpiece), molten pool size, molten pool temperature distribution, and heat-affected zone range. Defect detection data may include the number and size of porosity, cracks (micro-cracks / macro-cracks), slag inclusions, lack of fusion / incomplete penetration, and spatter amount. This embodiment does not specifically limit these aspects.

[0068] It is understood that a deviation sub-region is a welding sub-region where welding deviations exist. These deviations can be measured using set deviation indices. If the deviation index of a welding sub-region exceeds a set tolerance threshold, then that welding sub-region is considered a deviation sub-region. If the deviation index is less than or equal to the set tolerance threshold, then that welding sub-region is not considered a deviation sub-region. Deviation indices can be selected from the welding quality data, or other indices can be further calculated based on the welding quality data; this embodiment does not specifically limit this.

[0069] It should be understood that after determining the deviation sub-regions, the process parameters of the corresponding galvanometers for these deviation sub-regions are adjusted to improve welding quality, thereby achieving closed-loop monitoring of each welding sub-region and realizing regional quality control.

[0070] Furthermore, a corresponding welding evaluation report can be generated based on the monitoring results of the welding sub-regions (e.g., welding quality data).

[0071] In practical implementation, the workpiece to be welded is divided into regions, generating a set of sub-regions. In each sub-region Assign the corresponding galvanometer And set process parameters (power) based on factors such as material and thickness. ,speed Pulse width The synchronization clock is activated, and all galvanometers perform parallel scanning of their respective paths under the same time reference. Welding quality data for each sub-region is monitored in real time; if deviations occur, the power or scanning speed of the corresponding galvanometer is adjusted immediately to achieve closed-loop control. After welding of all sub-regions is completed, weld quality is automatically assessed and a report is generated.

[0072] In this embodiment, each galvanometer can be independently set with process parameters such as power and speed to achieve optimal welding of different materials or thickness areas; multiple galvanometers work synchronously, which can reduce the overall welding time by at least 20% compared to the traditional single-galvanometer segmented method; real-time regional monitoring can reduce the weld defect rate by at least 30%; the galvanometers are hot-swappable, and the number of galvanometers can be flexibly increased or decreased according to the workpiece size, improving versatility.

[0073] This embodiment provides a multi-galvanometer segmented synchronous laser welding method. Independent process parameters are assigned to galvanometers corresponding to each welding sub-region of the workpiece. The welding path of each welding sub-region in the workpiece is obtained. Multiple galvanometers with independent process parameters are synchronously controlled to guide the laser output from the laser source to the welding path of the corresponding welding sub-region, performing segmented laser welding on the workpiece. This embodiment uses multiple galvanometers to handle different welding areas of the same workpiece. Each galvanometer can independently set process parameters to achieve optimal welding of areas with different materials or thicknesses. Furthermore, controlling the synchronous operation of multiple galvanometers effectively shortens the overall welding time and improves welding efficiency. In addition, real-time monitoring of the welding sub-regions and adjustment of process parameters to ensure welding quality effectively reduces the weld defect rate.

[0074] The multi-mirror segmented synchronous laser welding method provided in this application can solve the technical problem that traditional laser welding makes it difficult to achieve independent parameter setting and synchronous control for different areas of the same workpiece. Compared with the prior art, the beneficial effects of the multi-mirror segmented synchronous laser welding method provided in this application are the same as those of the multi-mirror segmented synchronous laser welding device provided in the above embodiments, and other technical features in the multi-mirror segmented synchronous laser welding method are the same as those disclosed in the above embodiments, and will not be repeated here.

[0075] This application provides a multi-mirror segmented synchronous laser welding device, which includes the multi-mirror segmented synchronous laser welding apparatus described in the above embodiments and is configured to implement the steps of the multi-mirror segmented synchronous laser welding method as described in the above embodiments.

[0076] The multi-mirror segmented synchronous laser welding equipment provided in this application can solve the technical problem that traditional laser welding makes it difficult to achieve independent parameter setting and synchronous control for different areas of the same workpiece. Compared with the prior art, the beneficial effects of the multi-mirror segmented synchronous laser welding equipment provided in this application are the same as those of the above embodiments, and other technical features of the multi-mirror segmented synchronous laser welding equipment are the same as those disclosed in the above embodiments, and will not be repeated here.

[0077] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0078] The above are merely specific embodiments 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 the claims.

[0079] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the multi-mirror segmented synchronous laser welding method described in the above embodiments.

[0080] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0081] The aforementioned computer-readable storage medium may be included in the multi-mirror segmented synchronous laser welding equipment; or it may exist independently and not be assembled into the multi-mirror segmented synchronous laser welding equipment.

[0082] The aforementioned computer-readable storage medium carries one or more programs. When the aforementioned one or more programs are executed by the multi-mirror segmented synchronous laser welding equipment, the multi-mirror segmented synchronous laser welding equipment: assigns independent process parameters to the galvanometers corresponding to each welding sub-region in the workpiece to be welded; obtains the welding path of each welding sub-region in the workpiece to be welded; synchronously controls multiple galvanometers with independent process parameters to guide the laser output from the laser source to the welding path of the corresponding welding sub-region, and performs segmented laser welding on the workpiece to be welded.

[0083] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0084] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0085] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0086] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described multi-mirror segmented synchronous laser welding method. This solves the technical problem that traditional laser welding struggles to achieve independent parameter setting and synchronous control for different areas of the same workpiece. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the multi-mirror segmented synchronous laser welding method provided in the above embodiments, and will not be elaborated upon here.

[0087] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the multi-mirror segmented synchronous laser welding method described above.

[0088] The computer program product provided in this application can solve the technical problem that traditional laser welding makes it difficult to achieve independent parameter setting and synchronous control of different areas of the same workpiece. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the multi-mirror segmented synchronous laser welding method provided in the above embodiments, and will not be repeated here.

[0089] The above are only some embodiments of this application and do not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A multi-mirror segmented synchronous laser welding device, characterized in that, The device includes a multi-galvanometer module, a laser source, a control unit, and a fixture platform. The workpiece to be welded is placed on the fixture platform. The workpiece to be welded includes multiple welding sub-regions. The multi-galvanometer module includes multiple galvanometers, and different welding sub-regions correspond to different galvanometers. The control unit performs the following steps: Assign independent process parameters to the galvanometers corresponding to each welding sub-region in the workpiece to be welded; Obtain the welding path of each welding sub-region in the workpiece to be welded; Multiple galvanometers with independent process parameters are synchronously controlled to guide the laser output from the laser source to the welding path of the corresponding welding sub-region, thereby performing segmented laser welding on the workpiece to be welded.

2. The apparatus as claimed in claim 1, characterized in that, Each galvanometer is equipped with an independent drive unit, power adjustment unit, and focal length adjustment unit; The driving unit is used to receive control commands sent by the control unit and drive the corresponding galvanometer to respond to the control commands; The power adjustment unit is used to adjust the power of the corresponding galvanometer based on the process parameters; The focal length adjustment unit is used to adjust the laser focal height of the corresponding galvanometer.

3. The apparatus as described in claim 1, characterized in that, Each galvanometer is hot-swappable, and each galvanometer is set in a preset optimal installation position in the corresponding welding sub-area.

4. The apparatus as claimed in claim 1, characterized in that, The laser source is a single light source, and the laser output from the single light source is distributed to each galvanometer by a beam splitter.

5. The apparatus as claimed in claim 1, characterized in that, The laser source consists of multiple light sources, with each galvanometer corresponding to at least one light source. The laser output from the multiple light sources is transmitted to the corresponding galvanometer through coupling.

6. The apparatus as claimed in claim 1, characterized in that, The device also includes a monitoring unit; The monitoring unit is used to collect welding quality data of each welding sub-region in the workpiece to be welded, and to feed the welding quality data back to the control unit. The control unit is used to determine the deviation sub-region based on the welding quality data of each welding sub-region in the workpiece to be welded, and to adjust the process parameters of the galvanometer corresponding to the deviation sub-region.

7. A multi-mirror segmented synchronous laser welding method, characterized in that, The multi-mirror segmented synchronous laser welding apparatus, as described in any one of claims 1 to 6, comprises the following methods: Assign independent process parameters to the galvanometers corresponding to each welding sub-region in the workpiece to be welded; Obtain the welding path of each welding sub-region in the workpiece to be welded; Multiple galvanometers with independent process parameters are synchronously controlled to guide the laser output from the laser source to the welding path of the corresponding welding sub-region, thereby performing segmented laser welding on the workpiece to be welded.

8. The method as described in claim 7, characterized in that, The step of assigning independent process parameters to the galvanometers corresponding to each welding sub-region in the workpiece to be welded includes: Obtain the welding influencing factors for each welding sub-region in the workpiece to be welded, wherein the welding influencing factors include at least material, thickness and size; Based on the welding influencing factors of each welding sub-region in the workpiece to be welded, independent process parameters are assigned to the galvanometer corresponding to each welding sub-region in the workpiece to be welded. The process parameters include at least power, speed and pulse width.

9. The method as described in claim 7, characterized in that, The synchronous control of multiple galvanometers with independent process parameters guides the laser output from the laser source along the welding path corresponding to the welding sub-region. Following the step of segmented laser welding of the workpiece to be welded, the method further includes: Obtain welding quality data for each welding sub-region in the workpiece to be welded. The welding quality data includes at least weld geometry data, fusion state data, defect detection data, and process stability data. Based on the welding quality data of each welding sub-region in the workpiece to be welded, the deviation sub-region is determined; The process parameters of the galvanometer corresponding to the deviation sub-region are adjusted.

10. A multi-mirror segmented synchronous laser welding device, characterized in that, The device includes a multi-mirror segmented synchronous laser welding apparatus as described in any one of claims 1 to 6.

Images