Light path adjustment method and device, equipment, storage medium and product

Abstract

The invention provides an optical path adjustment method and device, equipment, a storage medium and a product. The method comprises the steps that in response to a welding instruction triggered by a user, a laser is controlled to excite a laser beam, and the actual path of the laser beam is obtained; determining the offset between the actual path of the laser beam and a preset theoretical path; and based on the offset, a servo mechanism is controlled to adjust the mirror inclination angle of the laser, so that the actual path of the laser beam is matched with the preset theoretical path. The inclination angle of the reflector and the focus lens is automatically adjusted by the servo mechanism, so that the direction of the light path is corrected, errors caused by manual calibration are avoided, and the adjustment precision of the laser light path in the laser welding machine is improved.

Description

Technical Field

[0001] The present application relates to the field of metal processing technology, and in particular to an optical path adjustment method, device, equipment, storage medium and product. Background Art

[0002] Laser welding is a key process in current laser welding processes, and weld quality directly determines the continuity and reliability of strip production. In high-speed, high-precision manufacturing scenarios, laser welders must ensure symmetrical fusion lines, guaranteed penetration depth, and a weld free of oxide inclusions to meet the stringent performance requirements of materials like high-strength steel. However, external beam path deviation is a common issue in laser welding, which can easily lead to oxide inclusions in the fusion zone, threatening production stability and increasing the risk of strip breakage.

[0003] At present, the traditional optical path calibration process in laser welding relies on manual experience adjustment and lacks quantitative standards and monitoring methods. As a result, the accuracy after calibration is still low and the re-welding rate remains high. The adjustment accuracy of the laser optical path in laser welding is insufficient. Summary of the Invention

[0004] The embodiments of the present application provide a light path adjustment method, device, equipment, storage medium and product, which can improve the technical problem of insufficient adjustment accuracy of the laser light path.

[0005] In a first aspect, the present application provides a light path adjustment method, which is applied to a laser welder and includes:

[0006] In response to a welding instruction triggered by a user, the laser is controlled to excite the laser beam and the actual path of the laser beam is obtained;

[0007] Determine the deviation between the actual path of the laser beam and the preset theoretical path;

[0008] Based on the offset, the servo mechanism is controlled to adjust the mirror tilt angle of the laser so that the actual path of the laser beam matches the preset theoretical path.

[0009] In some possible implementations, after controlling the servo mechanism to adjust the mirror tilt angle of the laser based on the offset, the method further includes:

[0010] When a laser welder is performing welding, the corresponding welding parameters at multiple time nodes are obtained;

[0011] Constructing a corresponding statistical process control chart based on a plurality of welding parameters; wherein the statistical process control chart includes control limits for each welding parameter;

[0012] In the event that at least one welding parameter exceeds a corresponding control limit in a statistical process control chart, the laser welder is adjusted based on the welding parameter.

[0013] In some possible implementations, a corresponding statistical process control chart is constructed based on multiple welding parameters, including:

[0014] According to preset rules, multiple welding parameters are divided into multiple subgroups;

[0015] Calculate the statistical characteristic values ​​of multiple welding parameters in each subgroup respectively;

[0016] Determine the control limits of each welding parameter based on the statistical characteristic value corresponding to each welding parameter;

[0017] A statistical process control chart is constructed based on the statistical characteristic values ​​and control limits corresponding to each welding parameter.

[0018] In some possible implementations, statistical characteristic values ​​of multiple welding parameters in each subgroup are calculated separately, including:

[0019] The mean and range of each welding parameter in each subgroup are calculated to obtain the statistical characteristic values ​​of the welding parameters in each subgroup.

[0020] In some possible implementations, after controlling the servo mechanism to adjust the mirror tilt angle of the laser based on the offset, the method further includes:

[0021] When a laser welder is used for welding, the energy spectrum analysis result of the weld seam of the finished product corresponding to the laser welder is obtained;

[0022] Determine the oxygen content of the weld based on the weld energy spectrum analysis results;

[0023] When the oxygen content exceeds the preset threshold, the method returns to step 10 of determining the deviation between the actual path of the laser beam and the preset theoretical path.

[0024] In some possible implementations, after controlling the servo mechanism to adjust the mirror tilt angle of the laser based on the offset, the method further includes:

[0025] When the laser welder is performing welding, an image of the welded product corresponding to the laser welder is obtained;

[0026] Identify the weld position in the image, and when the deviation between the weld position and the preset position exceeds a preset threshold, return to step: determine the offset between the actual path of the laser beam and the preset theoretical path.

[0027] In some possible implementations, after controlling the servo mechanism to adjust the inclination angle of the reflective mirror and the focusing mirror in the laser based on the offset, the method further includes:

[0028] When the laser welder is used for welding, nitrogen is used to continuously cover the welding area at a preset flow rate, and the purity of the nitrogen is greater than or equal to the preset purity.

[0029] In a second aspect, the present application provides an optical path adjustment device, comprising:

[0030] an acquisition module, configured to control the laser to excite the laser beam and acquire the actual path of the laser beam in response to a welding instruction triggered by the user;

[0031] A determination module, used to determine the offset between the actual path of the laser beam and the preset theoretical path;

[0032] The control module is used to control the servo mechanism to adjust the mirror inclination angle of the laser based on the offset so that the actual path of the laser beam matches the preset theoretical path.

[0033] In a third aspect, the present application provides an optical path adjustment device, which includes: a processor, and a memory storing computer program instructions; the processor reads and executes the computer program instructions to implement the optical path adjustment method described above.

[0034] In a fourth aspect, the present application provides a computer-readable storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, the optical path adjustment method as described above is implemented.

[0035] In a fifth aspect, the present application provides a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the optical path adjustment method described above.

[0036] The optical path adjustment method, device, equipment, storage medium and product provided in the embodiments of the present application send a start command to the laser in the laser welder. After starting the laser beam, the actual path data is obtained in real time and compared with the preset theoretical path to determine the offset. According to the offset, the servo mechanism automatically adjusts the inclination angle of the mirror, thereby timely correcting the direction of the optical path when the optical path deviates, avoiding welding errors caused by optical path offset, and improving the weld quality during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present application can be better understood from the following description of specific embodiments of the present application in conjunction with the accompanying drawings, in which:

[0038] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features.

[0039] Figure 1 This is a flow chart of a light path adjustment method provided by one embodiment of the present application;

[0040] Figure 2This is a schematic structural diagram of a laser welding machine provided by one embodiment of the present application;

[0041] Figure 3 This is a scanned image of a metallographic section of a weld provided in one embodiment of the present application;

[0042] Figure 4 This is a scanned image of a metallographic section of a weld provided in another embodiment of the present application;

[0043] Figure 5 This is a structural diagram of an optical path adjustment device provided by an embodiment of the present application;

[0044] Figure 6 This is a schematic diagram of the hardware structure of the optical path adjustment device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0047] In order to solve the problems in the prior art, the embodiments of the present application provide a light path adjustment method, device, equipment, storage medium and product. The light path adjustment method provided by the embodiments of the present application is first introduced below.

[0048] Figure 1 FIG. 1 shows a flow chart of a light path adjustment method provided by an embodiment of the present application. Figure 1As shown, the method is applied to a laser welding machine, and the method may include the following steps: S101 to S103.

[0049] S101: In response to a welding instruction triggered by a user, the laser is controlled to excite a laser beam and an actual path of the laser beam is obtained.

[0050] Triggering a user instruction is when the user triggers a welding instruction through a certain interface, indicating the start of the laser welding process.

[0051] In practice, after the laser beam is transmitted, multiple sensors capture its position in real time. These sensors use this data as feedback for comparison with the theoretical path. For example, when a user clicks the "Start Welding" button on the screen, the program sends control instructions to the laser, activating it and beginning to emit the laser beam. Simultaneously, the laser beam's path is captured by the sensors, providing the actual path of the laser beam.

[0052] S102: Determine the offset between the actual path of the laser beam and the preset theoretical path.

[0053] The preset theoretical path may be a path based on a pre-designed representation, which represents an ideal laser welding trajectory.

[0054] The offset is the difference between the actual path and the theoretical path, and is the basis for path correction. The offset can be composed of two parts: position offset and angle offset.

[0055] In practice, the actual path data obtained from the laser scanner is compared with a pre-set theoretical path. This comparison is achieved by calculating the Euclidean distance between the actual and theoretical path points. Assuming the pre-set theoretical path is a straight line, and the path captured by the laser scanner deviates slightly from this straight line, this deviation is calculated and an offset vector is generated, indicating the magnitude and direction of the offset. This offset is then used to determine the actual path of the laser beam relative to the pre-set theoretical path.

[0056] S103: Based on the offset, controlling the servo mechanism to adjust the mirror inclination angle of the laser so that the actual path of the laser beam matches the preset theoretical path.

[0057] A servomechanism is a mechanical device that can precisely control position, velocity, and acceleration. It typically consists of a servo motor, a transmission, and a sensor. It responds to control system commands in real time and makes minute adjustments. In this embodiment, the servomechanism adjusts the inclination of the laser mirror, thereby affecting the direction of the laser beam.

[0058] In a specific implementation, the required mirror tilt is calculated based on the offset, and a servo mechanism adjusts the position of the laser mirror to correct the laser beam path. By adjusting the mirror tilt, the laser beam path gradually aligns with the theoretical path. Specifically, adjusting the mirror tilt involves adjusting the inclination of the laser reflector and focusing mirror.

[0059] The optical path adjustment method provided in the embodiment of the present application sends a start command to the laser in the laser welder. After starting the laser beam, the actual path data is obtained in real time and compared with the preset theoretical path to determine the offset. According to the offset, the servo mechanism automatically adjusts the inclination angle of the mirror, thereby correcting the direction of the optical path, avoiding errors caused by manual calibration, and improving the adjustment accuracy of the laser optical path in the laser welder.

[0060] In order to quickly identify abnormal situations, in some embodiments, after S103 , the method may further include the following steps: S1031 to S1033 .

[0061] S1031: When a laser welder is performing welding, obtain welding parameters corresponding to multiple time nodes.

[0062] Welding parameters refer to the various values ​​used to control and optimize weld quality during the laser welding process. Common welding parameters include: laser power, welding speed, focal position, laser beam diameter, etc.

[0063] In a specific implementation, various welding parameters are continuously recorded at each time point during the welding process. This data is stored in a database, which can be a time series data set. By periodically reading sensor data, the current value of the welding parameter is obtained at a specified time point, and the corresponding welding parameters at multiple time points are obtained.

[0064] S1032: Constructing a corresponding statistical process control chart based on the plurality of welding parameters, wherein the statistical process control chart includes control limits for each welding parameter.

[0065] A statistical process control chart (SPC chart) is a graphical tool used to monitor and analyze process variables to ensure they remain within control limits and prevent process runaway. It reflects process stability by displaying trends and variations in data.

[0066] In the specific implementation, the historical data of each welding parameter is plotted into a curve graph, each curve represents the change of a welding parameter, the control limits are calculated based on the data, and they are plotted on the SPC chart to construct the corresponding statistical process control chart.

[0067] S1033: When at least one welding parameter exceeds a corresponding control limit in a statistical process control chart, adjusting the laser welder based on the welding parameter.

[0068] In the specific implementation, each parameter in the welding process is monitored and compared with the control limits in the SPC chart. When the value of a welding parameter exceeds the set upper or lower control limit, the working state of the laser welder is automatically adjusted.

[0069] The optical path adjustment method provided in the embodiments of this application ensures that all data during the welding process reflects the actual operation by collecting welding parameters in real time. Statistical process control charts are used to analyze and monitor parameter changes during the welding process, ensuring that welding quality remains within a preset standard range. Real-time monitoring and automatic adjustment mechanisms ensure that welding parameters are always maintained at optimal levels, thereby avoiding quality fluctuations and improving welding accuracy. Through continuous data collection, analysis, and control, parameter fluctuations are dynamically captured and abnormal conditions are quickly identified.

[0070] In order to construct a more detailed statistical process control chart, in some embodiments, S1032 may include the following steps: S10321 to S10324.

[0071] S10321: Divide multiple welding parameters into multiple subgroups according to preset rules.

[0072] In a specific implementation, the preset rule may be to group by time, thereby dividing the multiple welding parameters into different subgroups.

[0073] S10322: Calculate the statistical characteristic values ​​of multiple welding parameters in each subgroup respectively.

[0074] Statistical eigenvalues ​​are metrics that summarize the numerical characteristics of a data set, such as mean, standard deviation, maximum value, and minimum value.

[0075] In the specific implementation, a data set is collected over a period of time for the welding parameters in each subgroup. Then, statistical calculations are automatically performed to obtain statistical characteristics such as the mean and standard deviation of each welding parameter in each subgroup.

[0076] S10323: Determine the control limits of each welding parameter based on the statistical characteristic value corresponding to each welding parameter.

[0077] In a specific implementation, for each welding parameter, its corresponding control limit is automatically calculated according to a preset formula based on its statistical characteristic value.

[0078] S10324: Construct a statistical process control chart based on the statistical characteristic values ​​and control limits corresponding to each welding parameter.

[0079] In a specific implementation, for each welding parameter, parameter data is collected to obtain the corresponding statistical characteristic value. For example, the vertical axis of each data point represents the statistical characteristic value of the welding parameter, and the horizontal axis represents time. The calculated control limits are plotted on a graph. These line segments represent the acceptable fluctuation range for each welding parameter, thus constructing a statistical process control chart.

[0080] The optical path adjustment method provided in the embodiment of the present application groups the welding parameters to facilitate detailed management, then calculates the statistical characteristics of each subgroup, confirms the parameter fluctuation range, and calculates the control limits based on the statistical characteristics to ensure that the parameter fluctuation is within a reasonable range, thereby constructing a more detailed statistical process control chart.

[0081] In order to obtain more accurate statistical characteristic values, in some embodiments, S10322 may include the following steps:

[0082] The mean and range of each welding parameter in each subgroup are calculated to obtain the statistical characteristic values ​​of the welding parameters in each subgroup.

[0083] The mean is the arithmetic average of a set of data, reflecting the central tendency of the data. The range is the difference between the maximum and minimum values ​​in a set of data, reflecting the fluctuation range of the data.

[0084] In practice, the system first collects parameter data for each subgroup from multiple welding processes or experiments. All data within the subgroup is summed and then divided by the number of data points. The data for each subgroup is sorted to ensure the maximum and minimum values ​​are identified. The difference between the maximum and minimum values ​​is calculated to obtain the range. Typically, there are multiple subgroups to process, and the mean and range are calculated for each subgroup to obtain the statistical characteristics of the welding parameters within each subgroup.

[0085] The optical path adjustment method provided in the embodiment of the present application can accurately calculate the mean and range of the welding parameters in each subgroup by calculating the mean and range of each welding parameter in each subgroup, thereby obtaining a more accurate statistical characteristic value.

[0086] In order to quickly correct problems when they occur, in some embodiments, after S103 , the following steps may be further included: S104 to S106 .

[0087] S104: When the laser welder is performing welding, an energy spectrum analysis result of a weld seam of a finished welded product corresponding to the laser welder is obtained.

[0088] Weld energy spectrum analysis is a method for inferring weld quality by analyzing the elemental composition of the weld surface or weld joint area during welding. It uses an energy spectrum analyzer to measure the elemental composition of the weld, providing data on the content of elements such as oxygen, nitrogen, and carbon.

[0089] In the specific implementation, the light signal emitted by the material on the weld surface is received, and the light signal on the weld surface is converted into an energy spectrum by the spectrometer. The collected energy spectrum is analyzed by the spectrometer software to extract the element content information.

[0090] S105: Determine the oxygen content of the weld based on the weld energy spectrum analysis results.

[0091] Oxygen content refers to the mass fraction of oxygen in the weld and is an important indicator in welding quality control. The presence of oxygen may cause brittleness or defects in the weld joint.

[0092] In a specific implementation, the mass fraction of oxygen element is extracted from the weld energy spectrum analysis result obtained previously.

[0093] S106: When the oxygen content exceeds the preset threshold, return to step: determining the offset between the actual path of the laser beam and the preset theoretical path.

[0094] In a specific implementation, when the oxygen content exceeds a preset threshold, it indicates that a problem has occurred in welding, and the process returns to the step of determining the offset between the actual path of the laser beam and the preset theoretical path, so as to re-perform welding.

[0095] The optical path adjustment method provided in this embodiment uses weld energy spectrum analysis to determine oxygen content. By comparing the actual and theoretical paths, it checks whether the abnormal oxygen content is caused by laser beam path deviation. If the deviation is too large, an adjustment is made. If the weld oxygen content exceeds the limit, an optical path recheck is automatically triggered, allowing for rapid correction when problems arise.

[0096] In order to quickly perform secondary calibration, in some embodiments, after S103 , the following steps may be further included: S107 to S108 .

[0097] S107: When the laser welder is performing welding, an image of the welded product corresponding to the laser welder is obtained.

[0098] In a specific implementation, when a laser welder is performing welding, images of the welding area are captured to obtain images of the welded product corresponding to the laser welder. These images can clearly show the formation and direction of the weld.

[0099] S108: Identify the weld position in the image. If the deviation between the weld position and the preset position exceeds a preset threshold, return to step: determine the offset between the actual path of the laser beam and the preset theoretical path.

[0100] In a specific implementation, the image can first be grayscaled and binarized to reduce computational complexity and highlight the weld features. Next, an edge detection algorithm is used to identify the weld edge in the image. If the weld position deviates from the preset position by more than a preset threshold, the algorithm returns to step 1: determining the offset between the actual laser beam path and the preset theoretical path, and recalibrating the image.

[0101] The optical path adjustment method provided in the embodiment of the present application uses image recognition technology, sensors and visual systems to ensure welding accuracy, utilizes weld quality detection, and quickly performs secondary calibration when necessary.

[0102] In order to improve the quality of welding, in some embodiments, after S103, the following steps may be further included:

[0103] When the laser welder is used for welding, nitrogen is used to continuously cover the welding area at a preset flow rate, and the purity of the nitrogen is greater than or equal to the preset purity.

[0104] In a specific implementation, when a laser welder is used for welding, a stable nitrogen flow is used to ensure that nitrogen covers the welding area to prevent oxidation, wherein the purity of the nitrogen is greater than or equal to a preset purity, for example, the purity of the nitrogen is 99.99%.

[0105] The optical path adjustment method provided in the embodiment of the present application ensures a stable supply of nitrogen during the welding process through nitrogen flow control and purity monitoring, prevents the occurrence of defects such as oxidation and porosity, and thus improves the quality of welding.

[0106] In some embodiments, in this example, the method operates on a laser welder such as Figure 2 As shown, the laser welder specifically includes: a laser beam outlet 100, an upper refraction and deflection unit 200, and a welding area 300. Among them, the laser beam outlet 100 is located at the front window of the resonator, the upper refraction and deflection unit 200 is located in the laser beam guide system, and the welding area 300 is the area where the laser head works.

[0107] During the calibration process of this laser welder, a laser plummet or target paper can be used as a specific inspection tool. The laser plummet digitally measures the deviation between the actual laser beam path and the theoretical path. Compared to manual visual inspection or simple tool inspection, the laser plummet quantifies the deviation and eliminates subjective errors. During the adjustment process, a precision servo mechanism fine-tunes the inclination of the reflector and focusing mirrors based on the test data, accurately positioning the laser focus on the weld centerline. Manual adjustment typically relies on feel or experience, making it difficult to achieve micron-level accuracy. However, the present invention uses mechanical automation to ensure repeatable and consistent adjustment.

[0108] After adjustment, a test weld can be performed. After the test weld, a weld quality inspection system, such as the QCDS-4E system, collects real-time fusion line symmetry data. If the offset exceeds ±0.1mm, the system automatically prompts a second calibration. Traditional manual verification relies on offline testing, such as metallographic sectioning, which is time-consuming and lacks real-time feedback.

[0109] To ensure the stability of the light guide system during welding, nitrogen gas with a purity of ≥99.99% (at a flow rate of 20 Nl / min) is continuously applied to the light guide system to prevent lens oxidation and contamination. During manual operation, gas flow and purity are susceptible to field conditions, but this invention ensures stability through closed-loop flow control. A regular cleaning schedule (e.g., every 8 hours) is also implemented, and cooling water conductivity is monitored (≤200 μS / cm) to prevent thermal deformation.

[0110] During actual welding, for high-strength steel with a tensile strength of ≤1500MPa, the laser power is increased to an upper limit of 4kW, and the welding speed is gradually increased from 1.5m / min to ensure that the penetration depth is ≥80% of the parent material thickness; according to the thickness of the strip (0.45~2.5mm), the laser focus position is adjusted toward the thick plate side, and the weld is leveled by a rolling wheel (pressure ≤29kN) to eliminate dimensional deviations.

[0111] Record welding parameters (e.g., power, speed, and focus position) and create an SPC control chart. When creating the SPC control chart, divide the subgroups into time or production batches, such as every 5 minutes or every 10 coils of steel. The subgroup size is usually 3 to 5 data points to ensure data representativeness and statistical validity. Calculate the mean and range for each subgroup. Based on the mean and range, the center line of the SPC control chart is the overall mean, and the upper and lower control limits are determined. Plot the subgroup mean and range on the chart along with the calculated control limits.

[0112] The fluctuations can then be analyzed through the SPC control chart. For points that exceed the control limits, if the data points exceed the upper or lower control limits, it indicates that there is abnormal interference. If 7 consecutive points in the SPC control chart rise or fall (such as the welding speed gradually decreases), it may be caused by equipment wear or parameter drift. If the data shows regular fluctuations, the cooling system or power supply stability needs to be checked. Data is randomly distributed within the control limits (such as the natural fluctuation of laser power by ±0.05kW), which is an inherent variation of the process and needs to be improved through system optimization. Non-random anomalies (such as a sudden increase in the oxygen content of a batch of welds) require immediate investigation of specific factors (such as insufficient nitrogen purity and optical path offset). The process capability index can be calculated to evaluate whether the parameter stability meets the requirements. When SPC detects an anomaly, the system automatically triggers an alarm and records the fault code. Through long-term SPC data accumulation, equipment life can be predicted (such as adjusting the mirror cleaning cycle from a fixed 8 hours to dynamic optimization).

[0113] When welding is completed, metallographic sections and energy spectrum analysis are used to verify the oxygen content of the weld. If the oxygen content exceeds the standard, the optical path re-inspection procedure is triggered. Figure 3 and Figure 4 As shown, Figure 3 The corresponding energy spectra are shown in Table 1.

[0114] Table 1

[0115]

[0116]

[0117] Table 1 shows that the oxygen content in the two sampled spectra does not exceed the preset threshold value, and no re-inspection is required.

[0118] Figure 4 The corresponding energy spectra are shown in Table 2.

[0119] Table 2

[0120] Spectrum O Mg Si S Ca Ti Fe Total content spectrum Figure 1 42.68 1.11 2.19 0.49 29.99 3.25 6.83 100.00 spectrum Figure 2 100.00 100.00 maximum 42.68 1.11 2.19 0.49 29.99 3.25 100.00 Minimum 42.68 1.11 2.19 0.49 29.99 3.25 6.83

[0121] In Table 2, the spectrum Figure 1 The oxygen content in the sample exceeds the preset threshold, so no further analysis is required. Figure 2 Conduct the test and proceed directly to retest.

[0122] Based on the optical path adjustment method provided in the above embodiment, the present application also provides a specific implementation of an optical path adjustment device. Please refer to the following embodiments.

[0123] See first Figure 5 The optical path adjustment device 500 provided in the embodiment of the present application includes the following modules:

[0124] The acquisition module 501 is used to control the laser to excite the laser beam in response to the welding instruction triggered by the user, and to acquire the actual path of the laser beam.

[0125] The determination module 502 is configured to determine an offset between an actual path of the laser beam and a preset theoretical path.

[0126] The control module 503 is used to control the servo mechanism to adjust the mirror tilt angle of the laser based on the offset so that the actual path of the laser beam matches the preset theoretical path.

[0127] As an implementation of the present application, the optical path adjustment device 500 further includes:

[0128] The acquisition unit is used to obtain welding parameters corresponding to multiple time nodes when the laser welder is performing welding.

[0129] The construction unit is used to construct a corresponding statistical process control chart according to multiple welding parameters, wherein the statistical process control chart includes control limits of each welding parameter.

[0130] The adjustment unit is used to adjust the laser welder based on the welding parameters when at least one welding parameter exceeds the corresponding control limit in the statistical process control chart.

[0131] As an implementation of this application, a construction unit includes:

[0132] The grouping subunit is used to divide multiple welding parameters into multiple subgroups according to preset rules.

[0133] The calculation subunit is used to calculate the statistical characteristic values ​​of multiple welding parameters in each subgroup respectively.

[0134] The determination subunit is used to determine the control limits of each welding parameter based on the statistical characteristic value corresponding to each welding parameter.

[0135] A subunit is constructed for constructing a statistical process control chart based on the statistical characteristic values ​​and control limits corresponding to each welding parameter.

[0136] As an implementation of the present application, the computing subunit includes:

[0137] The calculation subunit is used to calculate the mean and range of each welding parameter in each subgroup to obtain the statistical characteristic value of the welding parameters in each subgroup.

[0138] As an implementation of the present application, the optical path adjustment device 500 further includes:

[0139] The acquisition unit is used to obtain the weld energy spectrum analysis result of the finished welded product corresponding to the laser welder when the laser welder is performing welding.

[0140] The determination unit is used to determine the oxygen content of the weld according to the weld energy spectrum analysis result.

[0141] The judgment unit is used to return to the step of determining the offset between the actual path of the laser beam and the preset theoretical path when the oxygen content exceeds a preset threshold.

[0142] As an implementation of the present application, the optical path adjustment device 500 further includes:

[0143] The acquisition unit is used to acquire an image of a finished welded product corresponding to the laser welder when the laser welder is performing welding.

[0144] The recognition unit is used to identify the weld position in the image, and when the deviation between the weld position and the preset position exceeds a preset threshold, return to the step of determining the offset between the actual path of the laser beam and the preset theoretical path.

[0145] As an implementation of the present application, the optical path adjustment device 500 further includes:

[0146] The welding unit is used to continuously cover the welding area with nitrogen at a preset flow rate when welding is performed by a laser welder, and the purity of the nitrogen is greater than or equal to the preset purity.

[0147] Each module in the optical path adjustment device provided in the embodiment of the present application can implement each step in the above-mentioned optical path adjustment method and achieve corresponding effects. For the sake of brevity, they will not be repeated here.

[0148] Figure 6 A schematic diagram of the structure of the optical path adjustment hardware provided in an embodiment of the present application is shown.

[0149] The optical path adjustment device may include a processor 601 and a memory 602 storing computer program instructions.

[0150] Specifically, the processor 601 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0151] The memory 602 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 602 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 602 may include removable or non-removable (or fixed) media. Where appropriate, the memory 602 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 602 is a non-volatile solid-state memory.

[0152] The memory may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, generally, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the optical path adjustment method according to any one embodiment of the present disclosure.

[0153] The processor 601 reads and executes computer program instructions stored in the memory 602 to implement any one of the optical path adjustment methods in the above embodiments.

[0154] In one example, the optical path adjustment device may further include a communication interface 603 and a bus 610. Figure 6 As shown, the processor 601, the memory 602, and the communication interface 603 are connected via a bus 610 and communicate with each other.

[0155] The communication interface 603 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0156] Bus 610 includes hardware, software or both, and the parts of online data flow metering equipment are coupled to each other. For example, but not limitation, bus can include accelerated graphics port (AGP) or other graphics bus, enhanced industry standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industry standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 610 can include one or more buses. Although the present application embodiment describes and shows specific bus, the application considers any suitable bus or interconnection.

[0157] In addition, in conjunction with the optical path adjustment method in the above embodiments, embodiments of the present application may provide a computer storage medium for implementation. The computer storage medium stores computer program instructions. When the computer program instructions are executed by a processor, any of the optical path adjustment methods in the above embodiments is implemented.

[0158] An embodiment of the present application further provides a computer program product, including a computer program, which implements any one of the optical path adjustment methods in the above embodiments when the computer program is processed and executed.

[0159] It should be understood that the present application is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and illustrated as examples. However, the method process of the present application is not limited to the specific steps described and illustrated. Those skilled in the art can make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present application.

[0160] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0161] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps. In other words, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0162] Aspects of the present disclosure have been described above with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit. It is also understood that each box in the block diagram and / or flowchart and the combination of the boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0163] The above description is only a specific embodiment of the present application. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the scope of protection of the present application.

Claims

1. A light path adjustment method, characterized in that: The method is applied to a laser welding machine and comprises: In response to a welding instruction triggered by a user, controlling the laser to excite a laser beam and obtaining an actual path of the laser beam; Determining the offset between the actual path of the laser beam and a preset theoretical path; Based on the offset, a servo mechanism is controlled to adjust the mirror tilt angle of the laser so that the actual path of the laser beam matches the preset theoretical path.

2. The optical path adjustment method according to claim 1, wherein: After controlling the servo mechanism to adjust the mirror tilt angle of the laser based on the offset, the method further includes: When the laser welder is performing welding, obtaining welding parameters corresponding to multiple time nodes respectively; Constructing a corresponding statistical process control chart based on a plurality of welding parameters; wherein the statistical process control chart includes control limits for each welding parameter; In the event that at least one welding parameter exceeds a corresponding control limit in the statistical process control chart, the laser welder is adjusted based on the welding parameter.

3. The optical path adjustment method according to claim 2, wherein: The method of constructing a corresponding statistical process control chart according to a plurality of welding parameters includes: According to preset rules, multiple welding parameters are divided into multiple subgroups; respectively calculating statistical characteristic values ​​of a plurality of welding parameters in each of the subgroups; Determine the control limits of each welding parameter based on the statistical characteristic value corresponding to each welding parameter; A statistical process control chart is constructed based on the statistical characteristic values ​​and control limits corresponding to each welding parameter.

4. The optical path adjustment method according to claim 3, wherein: The separately calculating statistical characteristic values ​​of the plurality of welding parameters in each of the subgroups comprises: The mean and range of each welding parameter in each subgroup are calculated to obtain the statistical characteristic values ​​of the welding parameters in each subgroup.

5. The optical path adjustment method according to claim 1, wherein: After controlling the servo mechanism to adjust the mirror tilt angle of the laser based on the offset, the method further includes: When the laser welder is performing welding, obtaining a weld energy spectrum analysis result of a finished weld product corresponding to the laser welder; Determining the oxygen content of the weld according to the weld energy spectrum analysis result; When the oxygen content exceeds a preset threshold, the method returns to the step of determining the offset between the actual path of the laser beam and a preset theoretical path.

6. The optical path adjustment method according to claim 1, wherein: After controlling the servo mechanism to adjust the mirror tilt angle of the laser based on the offset, the method further includes: When the laser welder is performing welding, an image of a welded product corresponding to the laser welder is obtained; Identify the weld position in the image, and when the deviation between the weld position and the preset position exceeds a preset threshold, return to the step of determining the offset between the actual path of the laser beam and the preset theoretical path.

7. The optical path adjustment method according to claim 1, wherein: After controlling the servo mechanism to adjust the inclination angle of the reflecting mirror and the focusing mirror in the laser based on the offset, the method further includes: When the laser welder is performing welding, nitrogen is used at a preset flow rate to continuously cover the welding area, and the purity of the nitrogen is greater than or equal to the preset purity.

8. An optical path adjustment device, characterized in that: The device comprises: an acquisition module, configured to control the laser to excite the laser beam in response to a welding instruction triggered by the user, and to acquire an actual path of the laser beam; A determination module, configured to determine an offset between the actual path of the laser beam and a preset theoretical path; The control module is configured to control a servo mechanism to adjust the mirror tilt angle of the laser based on the offset so that the actual path of the laser beam matches the preset theoretical path.

9. An optical path adjustment device, characterized in that: The device includes: a processor and a memory storing computer program instructions; the processor reads and executes the computer program instructions to implement the optical path adjustment method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the optical path adjustment method according to any one of claims 1 to 7 is implemented.

11. A computer program product, characterized in that When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device is enabled to perform the optical path adjustment method according to any one of claims 1 to 7.

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