A multi-beam coordinated laser cutting method and device

Abstract

The present application provides a multi-beam collaborative laser cutting method and device thereof, and relates to the field of laser cutting technology. The method includes: obtaining multiple degrees of freedom information of multiple laser heads of a laser control system; obtaining multiple cutting fitting areas, and the multiple cutting fitting areas have cutting depth identifiers; generating multiple fitting depth intervals; obtaining multiple candidate set laser head sets; performing independent calibration of a single laser head, performing laser beam matching analysis on multiple cutting fitting areas, obtaining single beam matching areas and multi-beam matching areas; obtaining multi-laser beam optimization results; performing cutting control on single beam matching areas, and performing cutting control on multi-beam matching areas. The present application can solve the technical problem in the prior art that the lack of cutting depth fitting for multiple laser beams leads to poor collaborative effect, thereby affecting the cutting effect, and achieves the technical effect of improving the multi-beam collaborative cutting accuracy and improving the cutting efficiency at the same time.

Description

Technical Field

[0001] The present application relates to the field of laser cutting technology, and in particular to a multi-beam coordinated laser cutting method and device thereof. Background Art

[0002] Laser cutting technology is a material processing method widely used in metal processing, electronic manufacturing, automobile manufacturing and other fields. In the field of laser cutting technology, traditional laser cutting methods usually rely on a single laser head for cutting operations. This method has limitations in efficiency and accuracy when facing complex or large-scale cutting tasks. In order to improve cutting efficiency and quality, multi-beam collaborative laser cutting technology came into being.

[0003] The multi-beam collaborative laser cutting method mainly utilizes multiple laser beams to act on the material at the same time, and realizes collaborative cutting of the material by precisely controlling the position, power and focusing state of each laser beam.

[0004] Different positions of the processed product have different cutting depth requirements, but laser cutting is performed by adjusting the laser power. However, for deeper cutting requirements, it is difficult to complete them with one laser beam. In the existing technology, there is a lack of cutting depth fitting for multiple laser beams, which leads to poor synergy and affects the cutting effect. Summary of the invention

[0005] The purpose of this application is to provide a multi-beam coordinated laser cutting method and device thereof, so as to solve the technical problem in the prior art that the lack of cutting depth fitting for multiple laser beams leads to poor coordination effect, thereby affecting the cutting effect.

[0006] In view of the above problems, the present application provides a multi-beam coordinated laser cutting method and device.

[0007] In a first aspect, the present application provides a multi-beam coordinated laser cutting method, which is implemented by a multi-beam coordinated laser cutting device, wherein the method includes: obtaining multiple degrees of freedom information of multiple laser heads of a laser control system, wherein the multiple degrees of freedom information include a free motion area of ​​the laser head and an adjustable laser power interval; obtaining cutting requirement information of a preset blank, and fitting and connecting the cutting points of the preset blank based on the cutting requirement information to obtain multiple cutting fitting areas, and the multiple cutting fitting areas have cutting depth markings; obtaining material characteristic information of the preset blank, and fitting the optimal cutting depth of the multiple laser heads in combination with the adjustable laser power interval to generate multiple fitting depths. degree interval; based on the free motion area of ​​the multiple laser heads, the multiple cutting fitting areas are laser head matched to obtain multiple candidate laser head sets; based on the multiple candidate laser head sets and the multiple fitting depth intervals, a single laser head is independently verified, and based on the verification result, laser beam matching analysis is performed on the multiple cutting fitting areas to obtain a single beam matching area and a multi-beam matching area, wherein the single beam matching area includes matching single laser beam information; multi-laser beam synergistic effect optimization is performed on the multi-beam matching area to obtain a multi-laser beam optimization result; cutting control is performed on the single beam matching area based on the single laser beam information, and cutting control is performed on the multi-beam matching area based on the multi-laser beam optimization result.

[0008] In the second aspect, the present application also provides a multi-beam coordinated laser cutting device for executing a multi-beam coordinated laser cutting method as described in the first aspect, wherein the device includes: a degree of freedom acquisition module for acquiring multiple degrees of freedom information of multiple laser heads of the laser control system, wherein the multiple degrees of freedom information include the free motion area of ​​the laser head and the adjustable laser power interval; a cutting point fitting module for acquiring the cutting requirement information of a preset blank, and fitting and connecting the cutting points of the preset blank based on the cutting requirement information to obtain multiple cutting fitting areas, and the multiple cutting fitting areas have cutting depth identifiers; an optimal cutting depth fitting module for acquiring the material characteristic information of the preset blank, and fitting the optimal cutting depth of the multiple laser heads in combination with the adjustable laser power interval to generate multiple fitting depth areas. a laser head matching module, used for performing laser head matching on the multiple cutting fitting areas based on the free motion areas of the multiple laser heads to obtain multiple candidate laser head sets; a single laser head independent verification module, used for performing single laser head independent verification based on the multiple candidate laser head sets and the multiple fitting depth intervals, and performing laser beam matching analysis on the multiple cutting fitting areas based on the verification results to obtain single beam matching areas and multi-beam matching areas, wherein the single beam matching area includes matching single laser beam information; a synergistic effect optimization module, used for performing multi-laser beam synergistic effect optimization on the multi-beam matching area to obtain a multi-laser beam optimization result; a cutting control module, used for performing cutting control on the single beam matching area based on the single laser beam information, and performing cutting control on the multi-beam matching area based on the multi-laser beam optimization result.

[0009] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0010] Acquire multiple degrees of freedom information of multiple laser heads of the laser control system, wherein the multiple degrees of freedom information include the free motion area of ​​the laser head and the adjustable laser power interval; acquire cutting requirement information of a preset blank, and perform fitting connection of cutting points of the preset blank based on the cutting requirement information to obtain multiple cutting fitting areas, and the multiple cutting fitting areas have cutting depth marks; acquire material characteristic information of the preset blank, and perform optimal cutting depth fitting of the multiple laser heads in combination with the adjustable laser power interval to generate multiple fitting depth intervals; and perform fitting of the multiple cutting fitting areas based on the free motion areas of the multiple laser heads. The laser head matching is performed on the domain to obtain multiple candidate laser head sets; a single laser head is independently verified based on the multiple candidate laser head sets and the multiple fitting depth intervals, and a laser beam matching analysis is performed on the multiple cutting fitting areas based on the verification results to obtain a single beam matching area and a multi-beam matching area, wherein the single beam matching area includes matching single laser beam information; the multi-laser beam synergistic effect optimization is performed on the multi-beam matching area to obtain a multi-laser beam optimization result; the cutting control is performed on the single beam matching area based on the single laser beam information, and the cutting control is performed on the multi-beam matching area based on the multi-laser beam optimization result. Thus, multiple cutting fitting areas are obtained through the fitting connection of the cutting points, and the single laser head is further independently verified on the multiple cutting fitting areas, so as to perform a collaborative operation analysis of multiple laser beams, so as to achieve the technical effect of improving the multi-beam collaborative cutting accuracy and improving the cutting efficiency at the same time.

[0011] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented according to the contents of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are specifically cited below. It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easy to understand through the following description. DETAILED DESCRIPTION

[0012] The present application provides a multi-beam coordinated laser cutting method and device thereof, which solves the technical problem in the prior art that the lack of cutting depth fitting for multiple laser beams leads to poor synergy, thus affecting the cutting effect. Through the fitting connection of the cutting points, multiple cutting fitting areas are obtained, and the multiple cutting fitting areas are further independently calibrated by a single laser head, so as to perform collaborative operation analysis of multiple laser beams, thereby achieving the technical effect of improving the multi-beam collaborative cutting accuracy and improving the cutting efficiency.

[0013] Below, the technical solutions in this application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments of this application. It should be understood that this application is not limited to the example embodiments described here. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0014] Embodiment 1

[0015] The present application provides a multi-beam coordinated laser cutting method, wherein the method is applied to a multi-beam coordinated laser cutting device, and the method specifically comprises the following steps:

[0016] Step 1: Acquire multiple degrees of freedom information of multiple laser heads of the laser control system, wherein the multiple degrees of freedom information include the free motion area of ​​the laser head and the adjustable range of laser power;

[0017] Specifically, the existing laser control system is used to control the output status of the laser head, including the system platform of laser power, beam shape, direction and movement. The laser control system usually includes multiple laser heads, and multiple laser heads can work together. The degree of freedom information refers to the range of movement and output laser power of multiple laser heads, that is, the multiple degrees of freedom information include the free movement area of ​​the laser head and the adjustable laser power range. The free movement area is the area where the laser head can move, that is, the area where cutting operations can be performed, which needs to be determined in combination with the maximum moving diameter of the laser head's robotic arm. The adjustable laser power range is the power adjustment range of the laser head, which needs to be determined in combination with the actual minimum power and maximum power.

[0018] Step 2: obtaining cutting requirement information of a preset blank, and fittingly connecting the cutting points of the preset blank based on the cutting requirement information to obtain a plurality of cutting fitting areas, wherein the plurality of cutting fitting areas have cutting depth marks;

[0019] Specifically, the preset blank refers to the raw material to be cut by laser, and the cutting requirement information is the cutting target, including the cutting position and cutting depth. The preset blank may contain multiple positions that need to be cut. All cutting positions are mapped to a reference coordinate system to obtain the coordinates corresponding to all cutting positions, which are used as a cutting point. Further fitting connection of the cutting points is performed, that is, some points are connected, that is, these two points can be continuously cut by a laser head, and the laser head does not need to move in vain. For example, if a circular hole with a certain hole depth needs to be cut, then the cutting depth of these points is consistent and connected, then multiple points located at the edge of the circular hole can be continuously cut by a laser head, and the multiple points located at the edge of the circular hole are connected as a cutting fitting area. In layman's terms, it is to connect the points that are interconnected and have the same cutting depth to obtain multiple cutting fitting areas, and generate a cutting depth mark based on the cutting depth.

[0020] Step 3: Obtaining material characteristic information of the preset blank, and performing optimal cutting depth fitting for the multiple laser heads in combination with the adjustable laser power interval to generate multiple fitting depth intervals;

[0021] Specifically, material characteristic information refers to the material type of the preset blank, such as metal, resin, etc., which needs to be determined in combination with actual conditions. The optimal cutting depth fitting of the multiple laser heads is performed in combination with the adjustable laser power range, that is, within the adjustable laser power range of the multiple laser heads, with the goal of meeting the cutting quality, the depth range that the laser head can cut the preset blank is fitted. That is to say, the depth of laser cutting is limited. If the power is increased infinitely for deeper cutting, a conical gap may appear at the cutting position of the preset blank, and the cutting surface may be uneven. Therefore, it is necessary to ensure that the cutting depth fitting is performed under qualified quality conditions, and multiple fitting depth intervals are obtained to provide support for the subsequent matching analysis of the laser head.

[0022] Step 4: performing laser head matching on the multiple cutting fitting areas based on the free motion areas of the multiple laser heads to obtain multiple candidate laser head sets;

[0023] Specifically, the free motion areas of the multiple laser heads are compared with the multiple cutting fitting areas, and the laser heads whose free motion areas completely cover the multiple cutting fitting areas are combined to generate multiple candidate laser head sets, so as to achieve preliminary screening of laser heads and facilitate subsequent coordinated control of the laser heads for each cutting fitting area.

[0024] Step 5: performing independent verification of a single laser head based on the multiple candidate laser head sets and the multiple fitting depth intervals, and performing laser beam matching analysis on the multiple cutting fitting areas based on the verification results to obtain a single beam matching area and a multi-beam matching area, wherein the single beam matching area includes matching single laser beam information;

[0025] Specifically, independent verification of a single laser head is performed based on the multiple candidate laser head sets and the multiple fitting depth intervals, that is, analyzing whether the depth requirement of a cutting fitting area can be met by one laser head. Specifically, the fitting depth interval of each candidate laser head in the multiple candidate laser head sets is extracted from the multiple fitting depth intervals, and then compared with the cutting depth mark of the corresponding cutting fitting area. If the cutting fitting area of ​​any candidate laser head in the candidate laser head set can meet the cutting depth mark, the cutting fitting area is used as a single beam matching area, otherwise it is a multi-beam matching area. At the same time, based on the cutting depth mark in the single beam matching area, according to the process of obtaining the fitting depth interval in step three, according to the laser power corresponding to different fitting depths, the laser power information corresponding to the cutting depth mark is matched and obtained, and this is used as the single laser beam information.

[0026] Step 6: Optimizing the synergistic effect of multiple laser beams in the multi-beam matching area to obtain a multi-laser beam optimization result;

[0027] Specifically, due to the deep cutting depth in the multi-beam matching area, it is difficult to complete the cutting at one time with only one laser head, and the laser head may need to change the cutting direction, which is not only inefficient but also prone to cutting deviation. Therefore, multiple laser heads can be used to cut from opposite directions at the same time, thereby improving the cutting efficiency. Thus, the multi-laser beam synergy effect of the multi-beam matching area is optimized, that is, the multi-laser beam optimization result is obtained by optimizing the joint cutting effect of multiple laser heads, and the multi-laser beam optimization result includes the number of laser heads that need to be coordinated, the cutting point and the laser power information.

[0028] Step seven: Based on the single laser beam information, the single beam matching area is cut and controlled; based on the multi-laser beam optimization result, the multi-beam matching area is cut and controlled.

[0029] Specifically, based on the single laser beam information, the single beam matching area is cut and controlled according to the corresponding laser power; based on the multi-laser beam optimization result, the corresponding laser head is selected to perform collaborative cutting control of the multi-beam matching area according to the laser power; and, when the number of laser heads is sufficient, multiple areas in the single beam matching area and the multi-beam matching area can be cut and controlled simultaneously to improve cutting efficiency.

[0030] Furthermore, step three of this application also includes:

[0031] Mining a laser cutting record set based on the material feature information; performing data retrieval on the laser cutting record set according to the adjustable laser power range of the first laser head, and generating a plurality of first laser cutting sample sets corresponding to a plurality of first laser control parameters; constructing a laser cutting optimization function; performing cutting quality and depth evaluation on the plurality of first laser cutting sample sets through the laser cutting optimization function, and generating a first fitting depth range; and adding the first fitting depth range to the plurality of fitting depth ranges.

[0032] Furthermore, the present application also includes:

[0033] The laser cutting optimization function includes a fitness calculation function and a fitness optimization function;

[0034] The fitness calculation function is:

[0035] ;

[0036] For the Cutting adaptability of each laser head; is the first Normalized kerf depth of laser cut samples; is the first Normalized kerf surface flatness of laser cut samples; and is the weight coefficient; is the number of samples in any laser-cut sample set;

[0037] The fitness optimization function is:

[0038] ;

[0039] in, To find the best result for laser cutting, It is the preset cutting fitness; Choose a symbol for optimization.

[0040] Furthermore, the present application also includes the following steps:

[0041] The cutting fitness of multiple first laser cutting samples in the first laser cutting sample set is calculated by the laser cutting optimization function to obtain multiple first cutting fitnesses; the multiple first cutting fitnesses are judged and selected by the fitness optimization function to generate multiple first fitting depths; the multiple first fitting depths are statistically analyzed to generate the first fitting depth interval.

[0042] Specifically, the material characteristic information of the preset blank is obtained, and the optimal cutting depth fitting is performed on the multiple laser heads in combination with the adjustable laser power interval to generate multiple fitting depth intervals as follows:

[0043] First, based on the material characteristic information, the laser cutting records corresponding to the material characteristic information in the historical time are mined to obtain a laser cutting record set, in which each laser cutting record contains laser power, cutting depth, and cutting seam characteristics. Any one of the multiple laser heads is extracted and recorded as the first laser head. Data is retrieved in the laser cutting record set according to the adjustable laser power range of the first laser head to obtain laser cutting records with laser power in the adjustable laser power range, and clustered according to the laser power, that is, the laser cutting records corresponding to the same laser power are clustered, and the laser power corresponding to the clustering result is used as a plurality of first laser control parameters, and the corresponding cutting depth and cutting seam characteristics are used as the first laser cutting samples to form a first laser cutting sample set. That is, each first laser control parameter corresponds to a first laser cutting sample set consisting of a plurality of first laser cutting samples.

[0044] Further, constructing a laser cutting optimization function, wherein the laser cutting optimization function includes a fitness calculation function and a fitness optimization function;

[0045] The fitness calculation function is:

[0046] ;

[0047] For the Cutting adaptability of each laser head; is the first The normalized kerf depth of a laser cutting sample is to process the kerf depth in the laser cutting sample into a range of 0 to 1 by using an existing normalization method; is the first The normalized kerf surface flatness of the laser-cut samples can be calculated based on the The slit features of the laser cutting sample are calculated, and the degree of change of the height difference of multiple positions on the slit surface is calculated. For example, the similarity of the height of multiple positions on the slit surface can be calculated as the flatness of the slit surface. The similarity calculation can be achieved by existing technology. and is the weight coefficient, which is set by professionals in this field. is the number of samples in any laser cutting sample set.

[0048] The fitness optimization function is:

[0049] ;

[0050] in, is the optimization result of laser cutting, that is, the optimized fitting depth and the corresponding laser power. To preset the cutting adaptability, it is set by professionals in this field based on actual conditions; A symbol is selected for optimization, that is, a fitting depth whose cutting fitness is greater than or equal to a preset cutting fitness and a corresponding laser power are selected to obtain a laser cutting optimization result.

[0051] Furthermore, the cutting quality and depth of the plurality of first laser cutting sample sets are evaluated by the laser cutting optimization function to generate a first fitting depth interval. The specific steps are as follows: first, the cutting fitness of the plurality of first laser cutting samples in the first laser cutting sample set is calculated by the laser cutting optimization function to obtain a plurality of first cutting fitnesses, and then the plurality of first cutting fitnesses are judged and selected by the fitness optimization function, that is, the laser cutting samples whose cutting fitness is greater than or equal to the preset cutting fitness are selected, and a plurality of first fitting depths are generated by the cutting depths in these laser cutting samples. The plurality of first fitting depths have corresponding laser powers. After the laser head is subsequently selected, the corresponding cutting power can be matched based on the cutting depth identifier. Finally, the plurality of first fitting depths are statistically analyzed, and the minimum and maximum values ​​of the plurality of first fitting depths are extracted to form the first fitting depth interval. The first fitting depth interval is added to the plurality of fitting depth intervals, and so on, and the optimal cutting depth fitting is continued for the plurality of laser heads to obtain a plurality of fitting depth intervals. This enables cutting depth fitting of multiple laser heads, making it easier to analyze the cutting depth range that satisfies the cutting quality, thereby providing support for subsequent independent calibration of a single laser head, improving the accuracy of collaborative analysis, and further improving the cutting accuracy of multi-beam collaborative operations.

[0052] Furthermore, step five of this application also includes:

[0053] Perform a depth comparison between the cutting depth marks of the multiple cutting fitting areas and the multiple fitting depth intervals to determine whether the cutting depth marks are in the multiple fitting depth intervals; complete a single laser head independent verification based on the determination result; use the fitting depth interval that passes the single laser head independent verification as a single beam matching area, and use the fitting depth interval that fails the single laser head independent verification as a multi-beam matching area; and match the single laser beam information based on the cutting depth mark, wherein the single laser beam information includes laser power information.

[0054] Specifically, the process of performing independent verification of a single laser head based on the multiple candidate laser head sets and the multiple fitting depth intervals is as follows:

[0055] A depth comparison is performed between the cutting depth marks of the multiple cutting fitting areas and the multiple fitting depth intervals to determine whether the cutting depth mark is in the multiple fitting depth intervals. If the cutting depth mark is in any interval range of the multiple fitting depth intervals, it can be considered that the single laser head independent verification has passed, otherwise, it has failed. If the single laser head independent verification has passed, it means that the cutting of the cutting fitting area can be completed by one laser head. The fitting depth interval that has passed the single laser head independent verification is used as the single beam matching area, and the fitting depth interval that has not passed the single laser head independent verification is used as the multi-beam matching area. And the single laser beam information is matched based on the cutting depth mark, that is, the laser power information corresponding to the cutting depth mark is matched in the aforementioned laser cutting record set as the single laser beam information. In this way, the positioning of the single beam matching area and the multi-beam matching area is achieved through the independent verification of the single laser head, which is convenient for the collaborative cutting analysis of multiple laser beams and improves the cutting efficiency and cutting accuracy.

[0056] Furthermore, step six of this application also includes:

[0057] Acquire a collaborative cutting point set of the multi-beam matching area, wherein the collaborative cutting point set includes multiple points that can be used for collaborative cutting on the same axial cutting line; based on the cutting depth mark of the multi-beam matching area, combine the laser parameters of the collaborative cutting point set to obtain a collaborative point laser parameter group; perform multi-point cutting dynamic simulation on the collaborative point laser parameter group to obtain a multi-point cutting position sequence; establish a cutting distance influence relationship for the collaborative cutting point set, and use the cutting distance influence relationship to identify the collaborative influence of the multi-point cutting position sequence to obtain a collaborative influence index; use the collaborative influence index to feedback optimize the collaborative point laser parameter group to generate the multi-laser beam optimization result.

[0058] Specifically, the steps of optimizing the synergistic effect of multiple laser beams in the multi-beam matching area to obtain the multi-laser beam optimization result are as follows:

[0059] A collaborative cutting point set of the multi-beam matching area is obtained, wherein the collaborative cutting point set includes multiple points that can be collaboratively cut on the same axial cutting line. For example, if one beam is difficult to meet the cutting depth mark when cutting the multi-beam matching area, it is necessary to perform reverse cutting from another point in the relative direction. In other words, the collaborative cutting point set can be two points with symmetrical positions. Further, based on the cutting depth mark of the multi-beam matching area, the laser parameters of the collaborative cutting point set are combined to obtain a collaborative point laser parameter group, that is, the laser heads are combined according to the fitting depth interval of the laser heads for the relative points in the collaborative cutting point set, so that the sum of the fitting depths of the two laser heads is equal to the cutting depth mark of the multi-beam matching area, and the fitting depth and corresponding laser power of each point in the relative points are obtained as the collaborative point laser parameter group.

[0060] Furthermore, the collaborative point laser parameter group is subjected to a dynamic simulation of multi-point cutting, that is, the cutting positions of two symmetrical points at continuous time nodes in the laser cutting process are simulated, and arranged in chronological order to obtain a multi-point cutting position sequence. Specifically, a large number of historical laser power records and cutting position records can be obtained, based on existing virtual reality technology, such as building a cutting simulation platform through an existing digital twin platform, and then the collaborative point laser parameter group is subjected to a dynamic simulation of multi-point cutting, and the cutting positions of two symmetrical points in the simulation process are extracted to obtain a multi-point cutting position sequence. The cutting distance influence relationship of the collaborative cutting point set is established. In layman's terms, if the positions cut by two relative laser beams are too close, they will affect each other, such as increasing the surface temperature of the laser beam at the cutting position, thereby causing cutting errors, such as affecting other areas.

[0061] Specifically, based on the existing technology, the historical target cutting temperature and the historical actual cutting temperature at different distances can be collected and acquired. By comparing the deviation between the historical target cutting temperature and the historical actual cutting temperature, the temperature deviation degree corresponding to different distances is established, which is used as the cutting distance influence relationship. Further, the multi-point cutting position timing is identified for collaborative influence based on the cutting distance influence relationship, that is, the distance between the multi-point cutting positions under any timing node in the multi-point cutting position timing is calculated, and the temperature deviation degree at this time is matched based on the cutting distance influence relationship as a collaborative influence index. Finally, the collaborative point laser parameter group is feedback optimized based on the collaborative influence index, that is, the laser power in the collaborative point laser parameter group is used to resist the collaborative influence index. Specifically, based on the existing technology, a large amount of laser power and the corresponding cutting temperature are obtained to identify the influence of laser power on temperature, so as to adjust the laser power according to the resistance collaborative influence index, and the collaborative point laser parameter group is updated with the adjusted laser power to generate the multi-laser beam optimization result. In this way, the optimization of laser beam synergy effect is achieved and the collaborative cutting accuracy of multiple laser beams is improved.

[0062] Furthermore, the present application also includes the following steps:

[0063] The beam focusing monitoring data of the operating laser head is collected in real time; focusing deviation is identified based on the beam focusing monitoring data, the single laser beam information and the multi-laser beam optimization result to obtain a focusing deviation index; if the focusing deviation index is greater than a predetermined deviation threshold, focusing abnormality warning information is generated to issue a focusing abnormality reminder.

[0064] Specifically, after cutting control is performed, the beam focusing data generated by the laser head during operation is captured in real time through existing technology as beam focusing monitoring data, which may specifically include the focus. That is, based on the single laser beam information and the multi-laser beam optimization results, the target focus of the laser beam emitted by the laser head on the preset blank is extracted, and compared with the actual focus in the beam focusing monitoring data, and the deviation distance between the two is obtained as the focus deviation index. The predetermined deviation threshold is the focus deviation allowed in actual laser gas cutting, which is set by professional and technical personnel in this field based on actual conditions. If the focus deviation index is greater than the predetermined deviation threshold, it means that the focus is abnormal, and the focus abnormality warning information is automatically generated. The focus abnormality warning information can be presented in a variety of ways such as sound, light, and display screen, so as to remind the staff of the focus abnormality, and ensure the stable improvement of cutting quality and efficiency by monitoring the focus abnormality during the laser cutting process.

[0065] In summary, the multi-beam coordinated laser cutting method provided in this application has the following technical effects:

[0066] Acquire multiple degrees of freedom information of multiple laser heads of the laser control system, wherein the multiple degrees of freedom information include the free motion area of ​​the laser head and the adjustable laser power interval; acquire cutting requirement information of a preset blank, and perform fitting connection of cutting points of the preset blank based on the cutting requirement information to obtain multiple cutting fitting areas, and the multiple cutting fitting areas have cutting depth marks; acquire material characteristic information of the preset blank, and perform optimal cutting depth fitting of the multiple laser heads in combination with the adjustable laser power interval to generate multiple fitting depth intervals; and perform fitting of the multiple cutting fitting areas based on the free motion areas of the multiple laser heads. The laser head matching is performed on the domain to obtain multiple candidate laser head sets; a single laser head is independently verified based on the multiple candidate laser head sets and the multiple fitting depth intervals, and a laser beam matching analysis is performed on the multiple cutting fitting areas based on the verification results to obtain a single beam matching area and a multi-beam matching area, wherein the single beam matching area includes matching single laser beam information; the multi-laser beam synergistic effect optimization is performed on the multi-beam matching area to obtain a multi-laser beam optimization result; the cutting control is performed on the single beam matching area based on the single laser beam information, and the cutting control is performed on the multi-beam matching area based on the multi-laser beam optimization result. Thus, multiple cutting fitting areas are obtained through the fitting connection of the cutting points, and the single laser head is further independently verified on the multiple cutting fitting areas, so as to perform a collaborative operation analysis of multiple laser beams, so as to achieve the technical effect of improving the multi-beam collaborative cutting accuracy and improving the cutting efficiency at the same time.

[0067] Embodiment 2

[0068] Based on the same inventive concept as the multi-beam coordinated laser cutting method in the aforementioned embodiment, the present application also provides a multi-beam coordinated laser cutting device, the device comprising:

[0069] A degree of freedom acquisition module 11 is used to acquire multiple degrees of freedom information of multiple laser heads of the laser control system, wherein the multiple degrees of freedom information includes a free motion area of ​​the laser head and an adjustable laser power interval;

[0070] The cutting point fitting module 12 is used to obtain the cutting requirement information of the preset blank, and perform fitting connection of the cutting points of the preset blank based on the cutting requirement information to obtain multiple cutting fitting areas, and the multiple cutting fitting areas have cutting depth marks;

[0071] An optimal cutting depth fitting module 13 is used to obtain the material characteristic information of the preset blank, and perform optimal cutting depth fitting on the multiple laser heads in combination with the adjustable laser power interval to generate multiple fitting depth intervals;

[0072] A laser head matching module 14 is used to perform laser head matching on the multiple cutting fitting areas based on the free motion areas of the multiple laser heads to obtain multiple candidate laser head sets;

[0073] A single laser head independent verification module 15 is used to perform a single laser head independent verification based on the multiple candidate laser head sets and the multiple fitting depth intervals, and perform laser beam matching analysis on the multiple cutting fitting areas based on the verification results to obtain a single beam matching area and a multi-beam matching area, wherein the single beam matching area includes matching single laser beam information;

[0074] A synergistic effect optimization module 16 is used to perform multi-laser beam synergistic effect optimization on the multi-beam matching area to obtain a multi-laser beam optimization result;

[0075] The cutting control module 17 is used to perform cutting control on the single-beam matching area based on the single-laser-beam information, and to perform cutting control on the multi-beam matching area based on the multi-laser-beam optimization result.

[0076] Furthermore, the optimal cutting depth fitting module 13 in the device is also used for:

[0077] mining a laser cutting record set based on the material characteristic information;

[0078] Performing data retrieval in the laser cutting record set according to the adjustable laser power range of the first laser head to generate a plurality of first laser cutting sample sets corresponding to a plurality of first laser control parameters;

[0079] Construct laser cutting optimization function;

[0080] Performing cutting quality and depth evaluation on the plurality of first laser cutting sample sets by using the laser cutting optimization function to generate a first fitting depth interval;

[0081] The first fitting depth interval is added to the plurality of fitting depth intervals.

[0082] Furthermore, the optimal cutting depth fitting module 13 in the device is also used for:

[0083] The laser cutting optimization function includes a fitness calculation function and a fitness optimization function;

[0084] The fitness calculation function is:

[0085] ;

[0086] For the Cutting adaptability of each laser head; is the first Normalized kerf depth of laser cut samples; is the first Normalized kerf surface flatness of laser cut samples; and is the weight coefficient; is the number of samples in any laser-cut sample set;

[0087] The fitness optimization function is:

[0088] ;

[0089] in, To find the best result for laser cutting, It is the preset cutting fitness; Choose a symbol for optimization.

[0090] Furthermore, the optimal cutting depth fitting module 13 in the device is also used for:

[0091] Performing cutting fitness calculation on a plurality of first laser cutting samples in a first laser cutting sample set by using the laser cutting optimization function to obtain a plurality of first cutting fitnesses;

[0092] The plurality of first cutting fitnesses are judged and selected by using the fitness optimization function to generate a plurality of first fitting depths;

[0093] Statistical analysis is performed on the multiple first fitting depths to generate the first fitting depth interval.

[0094] Furthermore, the single laser head independent calibration module 15 in the device is also used for:

[0095] Performing depth comparison between the cutting depth marks of the multiple cutting fitting areas and the multiple fitting depth intervals to determine whether the cutting depth marks are within the multiple fitting depth intervals;

[0096] Complete independent calibration of single laser head based on the judgment results;

[0097] The fitting depth interval that has passed the independent verification of the single laser head is used as the single-beam matching area, and the fitting depth interval that has not passed the independent verification of the single laser head is used as the multi-beam matching area;

[0098] The single laser beam information is matched based on the cutting depth mark, wherein the single laser beam information includes laser power information.

[0099] Furthermore, the synergy optimization module 16 in the device is also used for:

[0100] Acquire a collaborative cutting point set in the multi-beam matching area, wherein the collaborative cutting point set includes a plurality of points that can be collaboratively cut on the same axial cutting line;

[0101] Based on the cutting depth mark of the multi-beam matching area, laser parameters are combined for the collaborative cutting point set to obtain a collaborative point laser parameter group;

[0102] Performing a multi-point cutting dynamic simulation on the coordinated point laser parameter group to obtain a multi-point cutting position sequence;

[0103] Establishing a cutting distance influence relationship of the collaborative cutting point set, and using the cutting distance influence relationship to identify the collaborative influence of the multi-point cutting position timing to obtain a collaborative influence index;

[0104] The collaborative point laser parameter group is feedback optimized using the collaborative influence index to generate the multi-laser beam optimization result.

[0105] Furthermore, the device further comprises a focusing abnormality reminding module, and the focusing abnormality reminding module is used for:

[0106] Real-time collection of laser head beam focusing monitoring data;

[0107] Based on the beam focusing monitoring data, the single laser beam information and the multi-laser beam optimization result, focusing deviation is identified to obtain a focusing deviation index;

[0108] If the focus deviation index is greater than a predetermined deviation threshold, a focus abnormality warning message is generated to issue a focus abnormality reminder.

[0109] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The multi-beam coordinated laser cutting method and specific examples in the aforementioned embodiment 1 are also applicable to a multi-beam coordinated laser cutting device in this embodiment. Through the aforementioned detailed description of a multi-beam coordinated laser cutting method, those skilled in the art can clearly understand a multi-beam coordinated laser cutting device in this embodiment, so for the sake of brevity of the specification, it will not be described in detail here. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0110] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0111] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the present application and its equivalent technology, the present application is also intended to include these modifications and variations.

Claims

1. A multi-beam coordinated laser cutting method, characterized in that: The method comprises: Acquire multiple degrees of freedom information of multiple laser heads of the laser control system, wherein the multiple degrees of freedom information include a free motion area of ​​the laser head and an adjustable laser power range; Obtaining cutting requirement information of a preset blank, fitting and connecting cutting points of the preset blank based on the cutting requirement information to obtain a plurality of cutting fitting areas, wherein the plurality of cutting fitting areas have cutting depth marks; Acquire material characteristic information of the preset blank, and perform optimal cutting depth fitting on the multiple laser heads in combination with the adjustable laser power interval to generate multiple fitting depth intervals; Performing laser head matching on the multiple cutting fitting areas based on the free motion areas of the multiple laser heads to obtain multiple candidate laser head sets; Performing independent verification of a single laser head based on the multiple candidate laser head sets and the multiple fitting depth intervals, and performing laser beam matching analysis on the multiple cutting fitting areas based on the verification results to obtain a single beam matching area and a multi-beam matching area, wherein the single beam matching area includes matching single laser beam information; Performing multi-laser beam synergistic effect optimization on the multi-beam matching area to obtain a multi-laser beam optimization result; Controlling the cutting of the single-beam matching area based on the single-laser-beam information, and controlling the cutting of the multi-beam matching area based on the multi-laser-beam optimization result; The multi-laser beam synergy effect optimization is performed on the multi-beam matching area to obtain the multi-laser beam optimization result, including: Acquire a collaborative cutting point set in the multi-beam matching area, wherein the collaborative cutting point set includes a plurality of points that can be collaboratively cut on the same axial cutting line; Based on the cutting depth mark of the multi-beam matching area, laser parameters are combined for the collaborative cutting point set to obtain a collaborative point laser parameter group; Performing a multi-point cutting dynamic simulation on the coordinated point laser parameter group to obtain a multi-point cutting position sequence; Establishing a cutting distance influence relationship of the collaborative cutting point set, and using the cutting distance influence relationship to identify the collaborative influence of the multi-point cutting position timing to obtain a collaborative influence index; Feedback optimization is performed on the collaborative point laser parameter group using the collaborative influence index to generate the multi-laser beam optimization result; The single laser head independent verification is performed based on the multiple candidate laser head sets and the multiple fitting depth intervals, including: Performing depth comparison between the cutting depth marks of the multiple cutting fitting areas and the multiple fitting depth intervals to determine whether the cutting depth marks are within the multiple fitting depth intervals; Complete independent calibration of single laser head based on the judgment results; The fitting depth interval that has passed the independent verification of the single laser head is used as the single-beam matching area, and the fitting depth interval that has not passed the independent verification of the single laser head is used as the multi-beam matching area; The single laser beam information is matched based on the cutting depth mark, wherein the single laser beam information includes laser power information.

2. The method according to claim 1, characterized in that After performing cutting control, the method further includes: Real-time collection of laser head beam focusing monitoring data; Based on the beam focusing monitoring data, the single laser beam information and the multi-laser beam optimization result, focusing deviation is identified to obtain a focusing deviation index; If the focus deviation index is greater than a predetermined deviation threshold, a focus abnormality warning message is generated to issue a focus abnormality reminder.

3. A multi-beam coordinated laser cutting device, characterized in that: For implementing the steps of the method according to any one of claims 1 to 2, the device comprises: A degree of freedom acquisition module, used to acquire multiple degrees of freedom information of multiple laser heads of the laser control system, wherein the multiple degrees of freedom information includes a free motion area of ​​the laser head and an adjustable laser power interval; The cutting point is a fitting module, which is used to obtain the cutting requirement information of the preset blank, and to fit and connect the cutting points of the preset blank based on the cutting requirement information to obtain multiple cutting fitting areas, and the multiple cutting fitting areas have cutting depth marks; An optimal cutting depth fitting module is used to obtain the material characteristic information of the preset blank, and perform optimal cutting depth fitting on the multiple laser heads in combination with the adjustable laser power interval to generate multiple fitting depth intervals; A laser head matching module, used for performing laser head matching on the multiple cutting fitting areas based on the free motion areas of the multiple laser heads to obtain multiple candidate laser head sets; A single laser head independent verification module is used to perform a single laser head independent verification based on the multiple candidate laser head sets and the multiple fitting depth intervals, and perform laser beam matching analysis on the multiple cutting fitting areas based on the verification results to obtain a single beam matching area and a multi-beam matching area, wherein the single beam matching area includes matching single laser beam information; A synergistic effect optimization module is used to perform multi-laser beam synergistic effect optimization on the multi-beam matching area to obtain a multi-laser beam optimization result; A cutting control module is used to control the cutting of the single-beam matching area based on the single-laser beam information, and to control the cutting of the multi-beam matching area based on the multi-laser beam optimization result.