Welding system

Abstract

According to the welding system, the welding device in the welding system can collect reflected light and emit laser at the same time, so that a workpiece can be placed on a working plane and kept in a static state when being detected and welded separately, and the welding device collects emitted light at a target position to determine positioning information; and at the same target position, laser is emitted based on the target welding angle corresponding to the positioning information. Therefore, errors caused by position changes of the workpiece cannot be introduced in the welding process, fine deviation generated when the scanning galvanometer emits laser to the workpiece is reduced, the welding precision of the welding system during laser welding treatment on the workpiece is improved, and the welding effect of the welding system on the workpiece is guaranteed.

Description

Technical Field

[0001] This application relates to the field of laser processing technology, and more particularly to a welding system. Background Technology

[0002] Laser welding technology is widely used in technologies such as battery production. It can be used to weld parts such as electrodes, leads, shells, and connecting pieces during the production process.

[0003] In the prior art, the welding system is equipped with a welding device and a detection device. The detection device can be used to place the workpiece in the detection position and detect the positioning information of the workpiece before welding. Then, the workpiece is placed in the welding position, so that the welding device can perform laser welding on the workpiece according to the welding angle determined by the positioning information.

[0004] However, existing welding systems have poor welding accuracy when performing laser welding on workpieces. Utility Model Content

[0005] This application provides a laser welding system to overcome the problem of poor accuracy when laser welding workpieces is performed by existing welding systems.

[0006] This application provides a welding system, comprising: a working plane for placing a workpiece to be welded; a laser for emitting laser light into a welding device; and a welding device for collecting reflected light from the workpiece at a target position to determine the positioning information of the workpiece, and emitting laser light into the workpiece at the target position based on a target welding angle corresponding to the positioning information to perform laser welding on the workpiece.

[0007] In one embodiment of this application, the optical axis of the reflected light incident on the welding device coincides with the optical axis of the laser emitted from the welding device.

[0008] In one embodiment of this application, the welding apparatus includes: a scanning galvanometer for receiving laser light emitted by the laser and emitting laser light onto the workpiece based on the target welding angle through an objective lens to perform laser welding on the workpiece; a detection light source for emitting detection light onto the working plane; and a detection module for collecting the reflected light from the workpiece through the objective lens.

[0009] In one embodiment of this application, the detection module is attached to the first surface of the scanning galvanometer.

[0010] In one embodiment of this application, the detection light source is attached to the second surface of the scanning mirror.

[0011] In one embodiment of this application, the welding device is further configured to: collect welding information of the workpiece in order to adjust the welding parameters when the welding device welds the workpiece.

[0012] In one embodiment of this application, the welding apparatus includes at least one sensor for collecting welding information of the workpiece.

[0013] In one embodiment of this application, the at least one sensor is attached to the third surface of the scanning mirror.

[0014] In one embodiment of this application, the at least one sensor is disposed between the detection module and the scanning galvanometer.

[0015] In one embodiment of this application, the welding information includes at least one of: penetration depth, reflected light, temperature, or plasma cloud.

[0016] In one embodiment of this application, the welding parameters include at least one of: decoking amount, oscillation welding amplitude, welding power, or shielding gas.

[0017] In one embodiment of this application, the welding system further includes: a first control device, which is connected to the laser, the scanning galvanometer, the detection light source and the detection module respectively, for receiving the positioning information sent by the detection module, controlling the laser to emit laser light, and controlling the scanning galvanometer to perform laser welding on the workpiece at the target welding angle corresponding to the positioning information.

[0018] In one embodiment of this application, the first control device is a control card.

[0019] In one embodiment of this application, the welding system further includes: a second control device, connected to the at least one sensor and the welding device respectively, for receiving the welding information sent by the at least one sensor, and adjusting the welding parameters when the welding device performs laser welding on the workpiece.

[0020] The welding system provided in this application features a welding device that can simultaneously collect reflected light and emit laser light. This allows the workpiece to be placed on the working plane and kept stationary during both inspection and welding. The welding device collects emitted light at the target location to determine positioning information, and then emits laser light at the same target location based on the target welding angle corresponding to the positioning information. Therefore, errors caused by changes in workpiece position are not introduced during the welding process, thus reducing the slight offset that occurs when the scanning galvanometer emits laser light towards the workpiece. This improves the welding accuracy of the welding system when laser welding the workpiece, ensuring the welding effect. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a laser welding system in the prior art;

[0023] Figure 2 A schematic diagram of an embodiment of the welding system provided in this application;

[0024] Figure 3 A schematic diagram of the structure of an embodiment of the welding system provided in this application;

[0025] Figure 4 A schematic diagram of another embodiment of the welding system provided in this application;

[0026] Figure 5 This is a schematic diagram illustrating the analysis of welding information provided in this application. Detailed Implementation

[0027] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] This application can be applied to welding systems, specifically laser welding systems. Particularly relevant to battery manufacturing technology, the entire battery production process can be achieved using laser welding technology provided by the laser welding system. Laser welding processes in battery manufacturing include: electrode post welding, bursting plate welding, and lead-out piece welding for cover plates; FTT welding and casing / cap welding for assembly lines; sealing pin welding for injection lines; and nickel sheet welding and connector welding for pack lines.

[0030] Figure 1 This is a schematic diagram of a laser welding system in the prior art, such as... Figure 1 The welding system shown includes a computer 031, a laser 01, and a scanning galvanometer 021. The laser 01 generates a laser and emits it to the scanning galvanometer 021. The scanning galvanometer 021 receives the laser emitted by the laser 01 and emits the laser to the workpiece at position A below it for laser welding.

[0031] More specifically, the computer 031 can be used to control the welding angle and welding parameters of the laser emitted by the scanning galvanometer 01 when laser welding a workpiece. For example, the computer 031 can adjust the angle of the objective lens by controlling the driving device inside the scanning galvanometer 01, thereby adjusting the angle of the laser emitted by the scanning galvanometer 01 through the objective lens, and realizing welding at different positions of the workpiece.

[0032] When welding different workpieces, although all workpieces are located at position A below the scanning galvanometer 021, slight differences in their placement can cause a minor shift in the laser beam emitted by the scanning galvanometer 021, affecting the welding effect. Therefore, some welding systems also include a detection device to determine the workpiece's positioning information.

[0033] exist Figure 1 In the example shown, the detection device of the welding system includes a CCD detection module 023, which can be used to collect the reflected light of the workpiece at position B below it and determine the positioning information of the workpiece based on the reflected light.

[0034] like Figure 1 The welding system shown also includes: a programmable logic controller (PLC) 022, and a CCD detection module 023 which sends the positioning information it determines to the PLC 022 via a computer 031. The PLC determines the welding angle of the scanning galvanometer 021 based on the positioning information and adjusts the welding angle of the scanning galvanometer 021 via the computer 031.

[0035] Therefore, combining Figure 1In the overall welding system, the existing technology for laser welding of workpieces includes the following steps:

[0036] Step 1: Transfer the workpiece to be welded to position B.

[0037] Step 2: The CCD detection module 023 collects the reflected light of the workpiece and determines the positioning information, and then sends the positioning information to PLC 022.

[0038] Step 3: PLC022 adjusts the welding angle of scanning galvanometer 021 by driving external axes, etc., according to the positioning information, so that scanning galvanometer 021 is set to the initial welding position.

[0039] Step 4: Transfer the workpiece to be welded from position B to position A.

[0040] Step 5: Computer 031 controls laser 01 to generate laser and emit laser to scanning mirror 021. Computer 031 controls scanning mirror 021 to emit laser to workpiece at position A to perform laser welding on workpiece.

[0041] However, in the above-mentioned Figure 1 The welding system shown has at least the following technical problems:

[0042] 1. The CCD detection module 023 collects the reflected light from the workpiece at position A and adjusts the welding angle of the scanning galvanometer 021 based on the reflected light. Subsequently, the scanning galvanometer 021 emits a laser at position B to perform laser welding on the workpiece. Since the collection of reflected light and the emission of laser light are achieved through different devices at different positions, the detection is indirect. The transfer of the workpiece from position B to position A introduces a positional error. This difference causes a slight offset when the scanning galvanometer 021 emits the laser to the workpiece, thereby reducing the welding accuracy of the welding system during laser welding and ultimately affecting the welding effect.

[0043] Second, after the CCD detection module 023 collects the reflected light and obtains the positioning information, it needs to send the positioning information to the PLC 022 for processing. Finally, the PLC 022 can control the scanning galvanometer 021 through the computer 031. Its control process design has many devices and is relatively complex, which reduces the overall welding efficiency of the welding system when welding the workpiece.

[0044] Third, the welding system cannot determine the welding quality during the welding process. It is necessary to set up other external devices to detect the welding information of the workpiece, and the computer 031 adjusts the welding parameters of the scanning galvanometer 021 according to the welding parameters. This method of adjusting welding parameters has poor real-time performance.

[0045] To address the problems existing in current welding systems, this application provides a welding system to improve welding accuracy during workpiece welding, a welding system to improve welding efficiency, and a welding system to improve the real-time performance of adjusting welding parameters. The technical solutions of this application are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and similar concepts or processes may not be repeated in some embodiments.

[0046] Figure 2 A schematic diagram of an embodiment of the welding system provided in this application is shown below. Figure 2 As shown, the welding system 1 provided in one embodiment of this application includes: a working plane 10, a laser 11, and a welding device 12.

[0047] The working plane 10 is used to place the workpiece to be welded. In one embodiment, a center point can be set on the working plane 10. For the workpiece to be welded, the workpiece can be placed on the working plane 10 so that the center of the workpiece coincides with the center point on the working plane 10.

[0048] Laser 11 is used to generate laser light and emit laser light to welding apparatus 12. This application does not limit the location or arrangement of laser 11, and laser 11 is connected to welding apparatus 12.

[0049] The welding device 12 is positioned at a target location above the working plane and faces the workpiece on the working plane. The welding device 12 provided in this application can be used to collect reflected light and to emit laser light.

[0050] Specifically, when the welding device 12 is used to collect reflected light, it can collect the reflected light from the workpiece placed on the working plane 10 at the target location to determine the workpiece's positioning information. The welding device 12 can determine the workpiece's positioning information based on the collected reflected light and, based on this positioning information, determine the target welding angle for welding the workpiece. Alternatively, the welding device 12 can send the positioning information to other control devices, allowing these devices to determine the target welding angle based on the positioning information.

[0051] When the welding device 12 is used to emit a laser, the welding device 12 can receive the laser emitted by the laser 11 and emit a laser to the workpiece set on the working plane 10 at the target welding angle determined according to the positioning information, so as to perform laser welding on the workpiece.

[0052] As can be seen, the welding device 12 provided in this embodiment can simultaneously collect reflected light and emit laser light, which is equivalent to integrating the functions of both a detection device and a welding device in the prior art into one device. When the detection and welding of the workpiece in the welding system can be achieved by the same device, the workpiece can be placed on the working plane and kept stationary during the detection and welding processes, while the welding device 12 collects the emitted light at the target position and then emits laser light at the same target position. Therefore, in the welding system provided in this embodiment, the collection of reflected light and the emission of laser light are achieved by the same device at the same position, which is a direct detection. During the welding process, no error caused by changes in the workpiece position is introduced, thereby reducing the slight offset generated when the scanning galvanometer 21 emits laser light to the workpiece, thus improving the welding accuracy of the welding system when performing laser welding on the workpiece and ensuring the welding effect of the welding system on the workpiece.

[0053] Figure 3 A schematic diagram of an embodiment of the welding system provided in this application is shown below. Figure 3 It shows Figure 2 A specific implementation method of the welding system.

[0054] The work platform 10 can be set as a rectangle or a square, etc. A coordinate system of xyz is established with the center point o of the work platform 10 as the center. The x-axis and y-axis are the directions along the two sides of the work platform 10, and the z-axis is the direction perpendicular to the plane on which the workpiece is placed on the work platform 10.

[0055] The welding device 12 is positioned at a target location facing the working plane 10, and the welding device 12 is... Figure 3 An opening p is provided on the side facing the working plane 10 along the z-axis. This opening p serves as both the light inlet for collecting reflected light and the light outlet for emitting laser light.

[0056] More specifically, when the welding device 12 collects the reflected light, the optical axis of the reflected light incident on the opening p of the welding device 12 is... Figure 3 In the negative z-axis direction, when the welding device 12 emits laser, the optical axis of the laser emitted from the opening p of the welding device 12 is... Figure 3 In the positive z-axis direction, although the two optical axes have different directions, they coincide. Therefore, the optical axis of the welding device 12 that collects the reflected light and the optical axis of the emitted laser are coincident, which can further ensure the welding progress of the welding device 12 on the workpiece when it is at the target position and the workpiece does not move, and further improve the welding effect of the welding system on the workpiece.

[0057] The following is combined Figure 3 The specific structure of the welding device 12 provided in this embodiment will be described, such as... Figure 3The welding device 12 shown specifically includes: a scanning galvanometer 121, a detection light source 122, and a detection module 123.

[0058] The scanning galvanometer 121 includes an objective lens 120 and at least one driving device. Figure 3 The example shown uses drive devices M1 and M2 as examples. Drive devices M1 and M2 can be used to adjust the angle of the objective lens 120 in the x and y directions, respectively. Specifically, the scanning galvanometer 121 is used to receive the laser emitted by the laser 11 and emits the laser onto the workpiece set on the work platform 10 based on the target welding angle through the objective lens 122, so as to perform laser welding on the workpiece. It can be understood that when the objective lens 122 rotates under the action of drive devices M1 and M2, lasers of different angles can be emitted through the objective lens at different angles. Therefore, the scanning galvanometer 121 can adjust the objective lens angle so that the laser emitted through the objective lens is at the target welding angle.

[0059] The detection light source 122 is used to emit detection light to the working plane 10, so that the workpiece on the working plane 10 reflects the detection light.

[0060] The detection module 123 is used to collect the reflected light from the workpiece through the objective lens of the scanning galvanometer 121. In one embodiment, the detection module 123 can also determine the positioning information of the workpiece based on the reflected light.

[0061] In one embodiment, the detection module 123 is fitted to the first surface of the scanning galvanometer 121. The first surface may be a side surface of the scanning galvanometer 121 perpendicular to the z-axis, for example... Figure 3 In the example shown, the detection module 123 is mounted on the surface of the scanning galvanometer 121 perpendicular to the z-axis and located on the left side of the figure. The detection module 123 and the scanning galvanometer 121 can be fixed together by means of adhesive, bolts, etc., so that the detection module 123 and the scanning galvanometer 121 form a whole and can move simultaneously.

[0062] In one embodiment, the detection light source 122 is fitted to the second surface of the scanning mirror 121. The second surface can be a side surface of the scanning mirror 123 perpendicular to the z-axis, or it can be a side surface of the scanning mirror 123 facing the working plane 10. For example, in... Figure 3 In the example shown, the detection light source 122 is disposed on the lower surface of the scanning mirror 121 facing the working plane 10, and the detection light source 122 may be a ring structure, arranged around the opening p of the scanning mirror 121. In one embodiment, the first surface and the second surface may be the same surface or two different surfaces.

[0063] In the welding system provided in this embodiment, the welding device 12 integrates the scanning galvanometer 121, the detection light source 122, and the detection module 123 through a relatively simple fitting arrangement. This allows the welding device 12 to both collect reflected light and emit laser light, thus eliminating the need for additional detection devices in the welding system 1. This reduces the overall structural complexity of the welding device 12 and consequently reduces the area occupied by the entire welding system 1, which is beneficial for the application of the welding system 1 provided in this embodiment under different working conditions.

[0064] Furthermore, in one embodiment of the welding system 1 provided in this application, the welding device 12 can also collect welding information of the workpiece during laser welding. That is, in addition to collecting reflected light and emitting laser light, the welding device 12 provided in this embodiment can also collect welding information of the workpiece to adjust the welding parameters of the welding device 12 when welding the workpiece.

[0065] For example, such as Figure 3 The welding apparatus 12 shown also includes an LWM (Light Welding) sensing system, wherein the LWM sensor system includes at least one sensor 124. In one embodiment, the welding parameters collected by the at least one sensor 124 include at least one of defocusing amount, oscillation welding amplitude, welding power, or shielding gas. Each sensor 124 can be used to collect one or more welding information of the workpiece, and the sensor 124 may specifically be a photoelectric semiconductor sensor, etc. In one embodiment, the welding information that the welding apparatus 12 can adjust when welding the workpiece includes at least one of penetration depth, reflected light, temperature, or plasma cloud.

[0066] In one embodiment, at least one sensor 124 may be disposed between the detection module 123 and the scanning galvanometer 121, that is, one surface of at least one sensor 124 is attached to the surface of the scanning galvanometer 121, and the other surface of at least one sensor 124 is attached to the detection module 123.

[0067] In another embodiment, at least one sensor 124 may be fitted to a third surface of the scanning galvanometer 121. In one embodiment, the third surface may be the same as one of the first surface and the second surface, or the third surface may be a surface that is different from both the first and second surfaces. This application provides various placement positions for at least one sensor 124, which can enhance the flexibility of the welding system 1 in design and application, and is more conducive to the application and promotion of the welding system 1.

[0068] In this embodiment, the scanning galvanometer 121, detection light source 122, detection module 123, and at least one sensor 124 in the welding device 12 form a whole, enabling the welding device 12 to collect reflected light, emit laser light, and collect welding information. This eliminates the need for additional detection devices and sensors in the welding system 1, reducing the overall structural complexity of the welding device 12 and thus reducing the area occupied by the entire welding system 1. This also facilitates the application of the welding system 1 provided in this embodiment under different working conditions.

[0069] Figure 4 A schematic diagram of another embodiment of the welding system provided in this application is shown below. Figure 4 The welding system shown is as follows Figure 2 The welding system shown also includes a first control device 131 and a second control device 13. The first control device 131 is connected to the laser 11, the scanning galvanometer 121, the detection light source 122, and the detection module 123. The second control device 13 is connected to at least one sensor 124 and the scanning galvanometer 121.

[0070] In one embodiment, combined with Figure 3 The second control device 13 is a computer, and the first control device 131 is a control card installed in the computer.

[0071] In one embodiment, such as Figure 4 In process a shown, after the detection module 123 receives the reflected light from the workpiece through the scanning galvanometer 121, it can determine the workpiece's positioning information based on the reflected light and send this information to the first control device 131. The first control device 131 then receives the positioning information from the detection module 123 and determines the target welding angle based on this information. Subsequently, as... Figure 4 In process b shown, the first control device 131 controls the laser 11 to emit laser light and controls the scanning galvanometer 121 to weld the workpiece at the target welding angle.

[0072] Alternatively, in another embodiment, the detection module 123 can also send the reflected light of the collected workpiece to the first control device 131, so that the first control device 131 can determine the positioning information of the workpiece based on the reflected light, and then determine the target welding angle based on the positioning information. This can reduce the amount of calculation required by the detection module 123 and reduce the computational complexity of the welding device 12.

[0073] In this embodiment, after receiving the positioning information sent by the detection module 123, the first control device 131 can also directly adjust the scanning galvanometer 121 according to the positioning information. Figure 1Compared with existing technologies, it no longer relies on PLC to process positioning information, thereby simplifying the device required to adjust the scanning galvanometer 121, reducing process complexity, and improving the response speed of adjusting the scanning galvanometer 121, thus improving the overall welding efficiency of the welding system 1 when welding workpieces.

[0074] In one embodiment, such as Figure 4 In process c shown, after at least one sensor 124 collects welding information during the workpiece welding process, it sends the welding information to the second control device 13. Then, after receiving the welding information sent by at least one sensor 124, the second control device 13, as follows... Figure 4 As shown in process d, the second control device 13 adjusts the welding parameters of the scanning galvanometer 121 when performing laser welding on the workpiece according to the welding information.

[0075] Specifically, the second control device 13 can adjust the current welding parameters more appropriately based on the current welding information and the data analysis results of historical welding information. Figure 1 Compared with existing technologies, welding system 1 can detect the welding information of the workpiece without setting up other external devices, and the second control device 13 can directly adjust the welding parameters according to the welding information, thereby improving the welding quality and greatly improving the real-time performance of adjusting the welding parameters.

[0076] Figure 5 This application provides a schematic diagram for analyzing welding information, such as... Figure 5 As shown, during laser welding of a workpiece, a plasma cloud 102 is generated in the welding pool 101 where the workpiece is located. At least one sensor 124 can be used to detect welding information through the plasma cloud 102. The second control device 13 establishes a corresponding value range for each welding information, thereby determining whether the welding parameters need to be adjusted based on the value range of each welding information.

[0077] For example, in Figure 5 In the example shown, the welding information includes plasma, temperature, reflected light, and penetration depth. S1 represents the value range corresponding to plasma, with the maximum value curve being H and the minimum value curve being L during the welding process. When the second control device 13 obtains that the plasma value in the current welding information is greater than the maximum value curve H or less than the minimum value curve L, it adjusts the welding parameters accordingly. Similarly, S2 represents the value range corresponding to temperature, S3 represents the value range corresponding to reflected light, and S4 represents the value range corresponding to penetration depth.

[0078] In one embodiment, some sensors 124 detect the weld depth in the welding information by laser ranging. Since the embodiments of this application require that the sensors 124 and the scanning galvanometer 121 that emits lasers be set together in the welding device 12, the laser used by the sensors 124 to detect the weld depth and the laser used by the scanning galvanometer 121 to weld can use different laser wavelength bands.

[0079] In one embodiment, for example, the second control device 13 can store an AI model and input welding information into the AI ​​model to obtain the welding parameters that need to be adjusted, output by the AI ​​model. The AI ​​model can be pre-trained based on historical welding information and welding parameters, and stored in the second control device 13. This embodiment provides an AI model for processing welding information to obtain welding parameters, exhibiting a higher level of intelligence, and improving the accuracy and effectiveness of adjusting welding parameters based on the AI ​​model.

[0080] For example, when the penetration depth in the welding information exceeds the value range, the defocusing amount in the welding parameters is adjusted; when the reflected light in the welding information exceeds the value range of S3, the amplitude of the oscillation welding in the welding information is adjusted; when the thermal radiation in the welding information exceeds the value range of S2, the welding power in the welding information is adjusted; when the plasma cloud in the welding information exceeds the value range of S1, the shielding gas in the welding information is adjusted, etc.

[0081] In one embodiment, the second control device 13 can also automatically generate a product quality report for the workpiece and provide it to the workpiece manufacturer based on the welding parameters collected during the welding process after the entire welding process of the workpiece is completed, thereby further improving the automation and intelligence of the welding system 1.

[0082] Therefore, in conjunction with the welding system provided in the embodiments of this application, the process of laser welding workpieces based on the welding system of this application includes the following steps:

[0083] Step 1: Place the workpiece to be welded on the work platform 10, and the second control device 13 determines the initial welding parameters required for welding the workpiece in advance.

[0084] Step 2: The detection module 123 collects the reflected light from the workpiece and sends it to the first control device 131. The first control device 131 determines the positioning information based on the reflected light. Specifically, it can perform a difference calculation between the detection data obtained from the reflected light and the reference data, and then use the difference calculation data to interpolate the preset value of the galvanometer, so that the galvanometer can execute the interpolated positioning information.

[0085] Step 3: The first control device 131 controls the galvanometer 121 to perform laser welding on the workpiece according to the positioning information, with welding parameters and target welding angle. The target welding angle can be specifically achieved by adjusting the position information after interpolation according to the planned trajectory.

[0086] Step 4: During the laser welding process on the workpiece, at least one sensor 124 detects the weld seam to obtain welding information. The at least one sensor 124 sends the welding information to the second control device 13 for analysis and processing. In a specific implementation, the second control device 13 can digitize the radiation light from the welding process into a corresponding image based on the welding information and then analyze it. Finally, based on... Figure 5 The curve shown indicates that the welding parameters need to be adjusted.

[0087] Step 5: After the welding of the workpiece is completed, the second control device 13 comprehensively evaluates the repeatability and stability of the entire welding process, monitors process abnormalities and defects in real time to ensure that defective workpieces do not flow out, and automatically generates a quality report.

[0088] In summary, the welding system 1 provided in this application embodiment can not only weld the workpiece, but also adjust the workpiece positioning information, detect the welding information during the workpiece welding process, and adjust the welding parameters. Therefore, the welding system 1 provided in this application embodiment has a higher degree of automation and intelligence.

[0089] Furthermore, it should be noted that in the specific implementation of the welding system 1 provided in this application, when the detection module 123 uses the objective lens of the scanning galvanometer 121 to collect reflected light, some objective lenses may cause distortion, field curvature, or astigmatism in the reflected light, resulting in poor image quality based on the reflected light and causing deviations in the determined positioning information. Therefore, in practical applications, the objective lens of the scanning galvanometer 121 in the welding system 1 can be customized, and the influence of the objective lens itself on the reflected light can be reduced by selecting and adjusting the objective lens parameters. Alternatively, the first control device 131 in the welding system 1 can use AI big data calibration to perform interpolation and fuzzy calculations on the image, thereby eliminating the influence of distortion, field curvature, or astigmatism caused by the reflected light on the positioning information when determining the positioning information, ensuring more accurate positioning information, and thus ensuring the accuracy of subsequent welding of the workpiece.

[0090] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A welding system, characterized in that, include: The working surface is used to place the workpiece to be welded; A laser used to emit laser light into a welding device; A welding device is used to collect reflected light from the workpiece at a target location to determine the positioning information of the workpiece, and to emit a laser at the target location based on the target welding angle corresponding to the positioning information to perform laser welding on the workpiece.

2. The system according to claim 1, characterized in that, The optical axis of the reflected light incident on the welding device coincides with the optical axis of the laser emitted from the welding device.

3. The system according to claim 2, characterized in that, The welding apparatus includes: A scanning galvanometer is used to receive the laser emitted by the laser and, through an objective lens, to emit a laser onto the workpiece based on the target welding angle to perform laser welding on the workpiece. A detection light source is used to emit detection light onto the working plane. The detection module is used to collect the reflected light from the workpiece through the objective lens to determine the positioning information of the workpiece.

4. The system according to claim 3, characterized in that, The detection module is fitted to the first surface of the scanning galvanometer.

5. The system according to claim 3, characterized in that, The detection light source is attached to the second surface of the scanning galvanometer.

6. The system according to any one of claims 1-5, characterized in that, The welding device is also used to: collect welding information of the workpiece in order to adjust the welding parameters when the welding device welds the workpiece.

7. The system according to claim 6, characterized in that, The welding apparatus includes: At least one sensor is provided for acquiring welding information of the workpiece.

8. The system according to claim 7, characterized in that, The at least one sensor is attached to the third surface of the scanning galvanometer.

9. The system according to claim 7, characterized in that, The at least one sensor is disposed between the detection module and the scanning galvanometer.

10. The system according to any one of claims 7-9, characterized in that, The welding information includes at least one of the following: penetration depth, reflected light, temperature, or plasma cloud.

11. The system according to any one of claims 7-9, characterized in that, The welding parameters include at least one of the following: decoking amount, oscillation welding amplitude, welding power, or shielding gas.

12. The system according to claim 6, characterized in that, Also includes: The first control device is connected to the laser, scanning galvanometer, detection light source and detection module respectively, and is used to receive the positioning information sent by the detection module, control the laser to emit laser light, and control the scanning galvanometer to perform laser welding on the workpiece at the target welding angle corresponding to the positioning information.

13. The system according to claim 12, characterized in that, The first control device is a control card.

14. The system according to claim 7, characterized in that, Also includes: The second control device is connected to the at least one sensor and the welding device respectively, and is used to receive the welding information sent by the at least one sensor, and to adjust the welding parameters when the welding device performs laser welding on the workpiece.

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