Laser cutting control system and method

Abstract

The invention discloses a laser cutting control system and method, and relates to the technical field of laser cutting. The laser cutting control system comprises a laser emission control module, a focusing control module, a continuity control module and a parameter setting module. Whether the laser emission instruction is sent or not is judged through the laser beam data and the laser beam parameter threshold range, and meanwhile whether the laser cutting head executes the laser cutting operation or not before the laser cutting operation is judged based on the obtained focus point regulation and control value. Then, the obtained continuity evaluation index is compared with a continuity evaluation threshold value range to judge whether the accelerated laser cutting operation is executed or not, and finally cutting parameter values are set according to the obtained focus point regulation and control value, the continuity evaluation index and the cutting quality evaluation value. Therefore, the stability of the laser cutting equipment in the accelerated laser cutting operation process is improved, and the problem that in the prior art, the stability of the laser cutting equipment in the accelerated laser cutting operation process is low is solved.

Description

Technical Field

[0001] The present invention relates to the field of laser cutting technology, and in particular to a laser cutting control system and method. Background Art

[0002] With the continuous development and application of high-power lasers, the speed and accuracy of laser cutting have been significantly improved. At the same time, the scope of application of laser cutting technology is also expanding, from the initial metal material cutting to the cutting of non-metallic materials, and even in some special fields such as microelectronics, biomedicine and other fields. The laser cutting control system is one of the core components of the laser cutting machine. It is responsible for controlling the position, power and time of the laser beam and plays a decisive role in the cutting effect. In addition, with the rapid development of technologies such as artificial intelligence and the Internet of Things, the laser cutting control system will gradually realize intelligent upgrading and provide enterprises with more comprehensive production management and decision-making support.

[0003] Existing laser cutting control systems are usually used in conjunction with computer numerical control systems. Through pre-programming and setting parameters, automatic feeding, automatic processing and continuous batch laser cutting operations can be achieved.

[0004] For example, the invention patent with announcement number CN117020399B announces a processing method and system for adjusting the beam focus of a laser machine, including: constructing a simulated focusing trajectory of a workpiece based on a preset focusing node and performing simulated cutting processing on the workpiece; judging whether the cutting beam during the simulated cutting processing produces a trajectory deviation, if so, adjusting the orientation layout of the focusing node on the workpiece and replanning the cutting connection line of the focusing node, and generating the content to be cut of the workpiece at the same time; judging whether there is a fuzzy cutting point surface in the content to be cut, if so, establishing the short-term focusing parameters of the laser machine based on the obtained cutting correction value and repairing the fuzzy cutting point surface to obtain a workpiece after the simulated cutting processing is completed; judging whether the connection relationship changes the original cutting requirements of the workpiece, if not, adaptively correcting the movement instruction content of the laser cutting head when generating different paths according to the obtained arc curve path; analyzing the cause of the generation of the fuzzy cutting point surface based on the iconic features, and obtaining the improvement content of the fuzzy cutting point surface.

[0005] For example, the focus displacement compensation method, device, equipment, and storage medium disclosed in the patent application with publication number: CN112828477A include: obtaining a first real-time temperature of a focusing lens group and a temperature rise amplitude per unit time; judging whether the first real-time temperature reaches a first threshold; judging whether the temperature rise amplitude per unit time reaches a second threshold; when the first real-time temperature reaches the first threshold and the temperature rise amplitude per unit time reaches the second threshold, continuously sending a first control instruction to an actuator once in each zoom time period; and adjusting the focus displacement according to the first control instruction.

[0006] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems: In the prior art, during the laser cutting operation, the auxiliary gas plays the role of blowing the molten metal out of the cut. When the auxiliary gas is replaced, the equipment will automatically stop running. At this time, the dynamic balance of the cutting process may be destroyed due to the re-cutting position and the stop position due to the equipment shutdown, making it difficult for the equipment to quickly restore a stable cutting state after restarting. There is a problem of low stability of the laser cutting equipment during accelerated laser cutting operations. Summary of the invention

[0007] The embodiments of the present application solve the problem of low stability of laser cutting equipment during accelerated laser cutting operations in the prior art by providing a laser cutting control system and method, thereby improving the stability of the laser cutting equipment during accelerated laser cutting operations.

[0008] The embodiment of the present application provides a laser cutting control system, including: a laser emission control module, a focusing control module, a continuity control module and a parameter setting module; wherein the laser emission control module is used to obtain laser beam data of the laser in a preset laser cutting area, and judge whether to send a laser emission instruction according to the laser beam data and a laser beam parameter threshold range, wherein the laser beam data includes an emission intensity and an emission frequency; the focusing control module is used to receive the laser emission instruction and monitor the focal length state of the laser cutting head in real time to obtain a focus point control value, automatically adjust the focal length and position of the laser cutting head according to the focus point control value and send a cutting instruction, and at the same time judge whether the laser cutting head is in the laser cutting according to the focus point control value. Whether to perform laser cutting operation before operation; the continuity control module is used to monitor the changes of cutting data of the laser cutting head in real time during the laser cutting operation to obtain the continuity evaluation index, and compare the continuity evaluation index with the continuity evaluation threshold range to determine whether to perform the accelerated laser cutting operation, and the cutting data includes the cutting path and the cutting speed; the parameter setting module is used to obtain the cutting quality evaluation value according to the cutting state of the laser cutting head during the accelerated laser cutting operation, and set the cutting parameter value of the laser cutting head during the laser cutting process according to the acquired focus point control value, the continuity evaluation index and the cutting quality evaluation value; the specific restriction expression of the focus point control value is: ; ; ; ; Where y is the number of the preset laser cutting area, , Y is the total number of preset laser cutting areas, e is a natural constant, Indicates the focus point control value of the laser cutting head in the yth preset laser cutting area, represents the correction factor of the influence coefficient of material properties, It represents the material property influence coefficient of the material to be cut in the yth preset laser cutting area. Indicates the real-time reflectivity of the material to be cut in the yth preset laser cutting area. represents the reference reflectivity, Represents the real-time heat conduction data of the material to be cut in the yth preset laser cutting area, represents the reference heat conduction data, Indicates the output power influence coefficient correction factor, It represents the output power influence coefficient of the laser in the yth preset laser cutting area, It represents the actual output power of the laser in the yth preset laser cutting area. represents the reference output power, Indicates the correction factor of the focal point position influence coefficient, It represents the influence coefficient of the focal point position of the laser cutting head in the yth preset laser cutting area. Indicates the actual focal point position of the laser cutting head in the yth preset laser cutting area, Indicates the upper limit of the preset focus area. Indicates the lower limit of the preset focus area. It represents the emission intensity of the laser in the yth preset laser cutting area. represents the emission intensity threshold range, Indicates the emission frequency of the laser in the yth preset laser cutting area, Indicates the transmit frequency threshold range.

[0009] Furthermore, the process of obtaining the focus point control value is as follows: obtaining the real-time reflectivity and real-time heat conduction data of the material to be cut in the preset laser cutting area, and combining the reference reflectivity and reference heat conduction data of the material to be cut to obtain the material property influence coefficient, the material property influence coefficient is used to reflect the influence of the material property to be cut on the determination of the focal point position of the laser cutting head; obtaining the actual output power and the actual focal point position of the laser before the laser cutting operation, and combining the reference output power and the upper and lower limits of the preset focus point area to obtain the output power influence coefficient and the focal point position influence coefficient, the output power influence coefficient is the ratio of the absolute value of the difference between the actual output power and the reference output power to the reference output power, and the focal point position influence coefficient is the ratio of the absolute value of the difference between the actual focal point position and the lower limit of the preset focus point area to the difference between the upper and lower limits; obtaining the preset material property influence coefficient correction factor, output power influence coefficient correction factor and focal point position influence coefficient correction factor from the preset database, and combining the obtained material property influence coefficient, output power influence coefficient and focal point position influence coefficient to obtain the focus point control value.

[0010] Furthermore, the method for obtaining the continuity evaluation index is as follows: B1, obtaining the initial cutting speed of the laser cutting head before performing the laser cutting operation within a preset time period and the initial smoothness of the material to be cut, and obtaining the average cutting speed of the laser cutting head during the laser cutting operation within the preset time period and the average smoothness of the cut of the material to be cut; B2, judging whether the average cutting speed is within the cutting speed threshold range, if so, executing B3, otherwise adjusting the output power of the laser until the re-acquired average cutting speed is within the cutting speed threshold range and then executing B3; B3, obtaining the cutting speed evaluation index and the smoothness evaluation index and performing addition operation to obtain the cutting evaluation coefficient, adding the cutting evaluation coefficient to the acquired focus point control value and then performing logarithmic operation to obtain the continuity evaluation index, the cutting speed evaluation index represents the ratio of the absolute value of the difference between the average cutting speed and the initial cutting speed to the initial cutting speed, and the smoothness evaluation index represents the ratio of the absolute value of the difference between the average smoothness and the initial smoothness to the initial cutting speed.

[0011] Furthermore, the specific steps for obtaining the cutting quality evaluation value are as follows: C1, determine whether the acceleration adjustment amount is equal to 0, if so, execute C2, otherwise execute C3; C2, obtain the first auxiliary gas coefficient of the laser cutting head during the laser cutting operation, and perform an exponential operation on the result of adding the continuity evaluation index within the continuity evaluation threshold range to the first auxiliary gas coefficient to obtain the cutting quality evaluation value, the first auxiliary gas coefficient is the ratio of the first auxiliary gas flow rate to the reference first auxiliary gas flow rate, and the first auxiliary gas flow rate is the flow rate of the auxiliary gas corresponding to the laser cutting head during the laser cutting operation; C3, obtain the second auxiliary gas coefficient of the laser cutting head during the accelerated laser cutting operation, and perform an exponential operation on the result of adding the continuity evaluation index within the continuity evaluation threshold range to the second auxiliary gas coefficient to obtain the cutting quality evaluation value, the second auxiliary gas coefficient is the ratio of the second auxiliary gas flow rate to the reference second auxiliary gas flow rate, and the second auxiliary gas flow rate is the flow rate of the auxiliary gas corresponding to the accelerated laser cutting head during the laser cutting operation.

[0012] The embodiment of the present application provides a laser cutting control method, comprising the following steps: step 1, obtaining laser beam data of a laser in a preset laser cutting area, judging whether to send a laser emission instruction according to the laser beam data and a laser beam parameter threshold range, wherein the laser beam data includes an emission intensity and an emission frequency; step 2, receiving a laser emission instruction and monitoring the focal length state of a laser cutting head in real time to obtain a focus point control value, automatically adjusting the focal length and position of the laser cutting head according to the focus point control value and sending a cutting instruction, and judging whether the laser cutting head performs a laser cutting operation before the laser cutting operation based on the focus point control value; step 3, monitoring the changes of the cutting data of the laser cutting head in real time during the execution of the laser cutting operation to obtain a continuity evaluation index, comparing the continuity evaluation index with the continuity evaluation threshold range to determine whether to perform an accelerated laser cutting operation, wherein the cutting data includes a cutting path and a cutting speed; step 4, obtaining a cutting quality evaluation value according to the cutting state of the laser cutting head during the accelerated laser cutting operation, and setting a cutting parameter value of the laser cutting head during the laser cutting process according to the acquired focus point control value, the continuity evaluation index and the cutting quality evaluation value; the specific limiting expression of the focus point control value is: ; ; ; ; Where y is the number of the preset laser cutting area, , Y is the total number of preset laser cutting areas, e is a natural constant, Indicates the focus point control value of the laser cutting head in the yth preset laser cutting area, represents the correction factor of the influence coefficient of material properties, It represents the material property influence coefficient of the material to be cut in the yth preset laser cutting area. Indicates the real-time reflectivity of the material to be cut in the yth preset laser cutting area. represents the reference reflectivity, Represents the real-time heat conduction data of the material to be cut in the yth preset laser cutting area, represents the reference heat conduction data, Indicates the output power influence coefficient correction factor, It represents the output power influence coefficient of the laser in the yth preset laser cutting area, It represents the actual output power of the laser in the yth preset laser cutting area. represents the reference output power, Indicates the correction factor of the focal point position influence coefficient, It represents the influence coefficient of the focal point position of the laser cutting head in the yth preset laser cutting area. Indicates the actual focal point position of the laser cutting head in the yth preset laser cutting area, Indicates the upper limit of the preset focus area. Indicates the lower limit of the preset focus area. It represents the emission intensity of the laser in the yth preset laser cutting area. represents the emission intensity threshold range, Indicates the emission frequency of the laser in the yth preset laser cutting area, Indicates the transmit frequency threshold range.

[0013] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. Determine whether to send a laser emission instruction through laser beam data and laser beam parameter threshold range, and determine whether the laser cutting head performs a laser cutting operation before the laser cutting operation based on the acquired focus point control value, and then determine whether to perform an accelerated laser cutting operation based on the acquired continuity evaluation index and continuity evaluation threshold range, and finally set the cutting parameter value according to the acquired focus point control value, continuity evaluation index and cutting quality evaluation value, thereby improving the accuracy of the laser cutting operation, and then improving the stability of the laser cutting equipment during the accelerated laser cutting operation, effectively solving the problem of low stability of the laser cutting equipment during the accelerated laser cutting operation in the prior art.

[0014] 2. The material property influence coefficient is obtained by processing the real-time reflectivity and real-time thermal conductivity data in combination with the reference reflectivity and reference thermal conductivity data of the material to be cut. At the same time, the output power influence coefficient and the focal point position influence coefficient are obtained according to the actual output power and the actual focal point position, in combination with the reference output power and the upper and lower limits of the preset focal point area. The focal point control value is obtained based on this, thereby achieving more accurate acquisition of the focal point control value, and then achieving more accurate determination of the focal length of the laser cutting head.

[0015] 3. By obtaining the initial cutting speed of the laser cutting head before the laser cutting operation is performed within a preset time period and the initial smoothness of the material to be cut, and at the same time obtaining the average cutting speed of the laser cutting head during the laser cutting operation within the preset time period and the average smoothness of the cut of the material to be cut, the obtained cutting evaluation coefficient is added to the obtained focus point control value and then a logarithmic operation is performed to obtain the continuity evaluation index, thereby achieving more accurate acquisition of the continuity evaluation index, and then achieving improved accuracy of the laser cutting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a laser cutting control system provided in an embodiment of the present application; Figure 2 A flow chart of a laser cutting control method provided in an embodiment of the present application; Figure 3 A flow chart for setting cutting parameter values ​​provided in an embodiment of the present application. DETAILED DESCRIPTION

[0017] The embodiment of the present application solves the problem of low stability of laser cutting equipment in the process of accelerated laser cutting operation in the prior art by providing a laser cutting control system and method. The laser beam data of the laser in a preset laser cutting area is obtained by a laser emission control module, and whether to send a laser emission instruction is determined according to the laser beam data and the laser beam parameter threshold range. Then, the laser emission instruction is received by a focusing control module and the focal length state of the laser cutting head is monitored in real time to obtain a focus point control value. At the same time, based on the focus point control value, it is determined whether the laser cutting head performs a laser cutting operation before the laser cutting operation. Then, the changes of the cutting data of the laser cutting head in the process of performing the laser cutting operation are monitored in real time by a continuity control module to obtain a continuity evaluation index. The continuity evaluation index is compared with the continuity evaluation threshold range to determine whether to perform the accelerated laser cutting operation. Finally, a cutting quality evaluation value is obtained according to the cutting state of the laser cutting head in the process of accelerated laser cutting operation by a parameter setting module. The cutting parameter value of the laser cutting head in the process of laser cutting is set according to the acquired focus point control value, continuity evaluation index and cutting quality evaluation value, thereby improving the stability of the laser cutting equipment in the process of accelerated laser cutting operation.

[0018] The technical solution in the embodiment of the present application is to solve the problem of low stability of the above-mentioned laser cutting equipment during the accelerated laser cutting operation. The overall idea is as follows: Whether to send a laser emission instruction is determined by the laser beam data and the laser beam parameter threshold range. At the same time, whether the laser cutting head performs a laser cutting operation before the laser cutting operation is determined based on the acquired focus point control value. Then, the acquired continuity evaluation index is compared with the continuity evaluation threshold range to determine whether to perform an accelerated laser cutting operation. Finally, the cutting parameter value is set according to the acquired focus point control value, continuity evaluation index and cutting quality evaluation value, thereby achieving the effect of improving the stability of the laser cutting equipment during the accelerated laser cutting operation.

[0019] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] like Figure 1 As shown, it is a structural schematic diagram of the laser cutting control system provided by the embodiment of the present application. The laser cutting control system provided by the embodiment of the present application includes: a laser emission control module, a focus control module, a continuity control module and a parameter setting module; wherein the laser emission control module is used to obtain laser beam data of the laser in a preset laser cutting area, and judge whether to send a laser emission instruction according to the laser beam data and the laser beam parameter threshold range, the laser is stored in a designated laser cutting device, the laser temperature and humidity in the preset laser cutting area are constant, the laser beam data includes emission intensity and emission frequency, and the laser beam parameter threshold range includes an emission intensity threshold range and an emission frequency threshold range; The focus control module is used to receive the laser emission instruction and monitor the focal state of the laser cutting head in real time to obtain the focus point control value, automatically adjust the focal length and position of the laser cutting head according to the focus point control value and send the cutting instruction, and judge whether the laser cutting head performs the laser cutting operation before the laser cutting operation based on the focus point control value. The focus point control value is used to evaluate the accuracy of the focal position of the laser cutting head. The cutting instruction is used to control the laser cutting head in the laser to perform the laser cutting operation on the material to be cut; the continuity control module is used to monitor the changes of the cutting data of the laser cutting head in real time during the execution of the laser cutting operation to obtain the continuity evaluation index, and compare the continuity evaluation index with the continuity evaluation threshold The value range is compared to determine whether to perform the accelerated laser cutting operation, the cutting data includes the cutting path and the cutting speed, and the continuity evaluation index is used to evaluate the continuity and stability of the laser cutting head during the laser cutting operation; the parameter setting module is used to obtain the cutting quality evaluation value according to the cutting state of the laser cutting head during the accelerated laser cutting operation, and the cutting parameter value of the laser cutting head during the laser cutting process is set according to the acquired focus point control value, continuity evaluation index and cutting quality evaluation value. The cutting quality evaluation value is used to reflect the accuracy of the material to be cut during the accelerated laser cutting operation, and the cutting parameter values ​​include the cutting data, focal length, output power and auxiliary gas flow rate of the laser cutting head.

[0021] In this embodiment, the material to be cut is usually a steel sheet or metal, and the emission intensity and emission frequency are measured by a deployed optical power meter and directly displayed on the display screen of the laser; the cutting path refers to the trajectory of the laser beam moving along the material to be cut during the laser cutting process, which is usually acquired in real time by a camera deployed on the laser; the cutting speed refers to the moving speed of the laser cutting head during the laser cutting process (unit: m / min), which is usually measured by a speed sensor deployed on the laser cutting head; the laser temperature and humidity in the laser cutting area are preset to be constant, for example, the air conditioning temperature of the workshop where the laser is located is set to 25°C and the humidity to 40%-60%.

[0022] In practical applications, the autofocus function of the laser cutting head is used to automatically adjust to an initial focus position: (1) According to the focus point control value, gradually adjust the focus position. The amplitude of each adjustment is generally 0.1-0.5mm. If the average smoothness of the cutting surface decreases, it means that the focus position is too high. At this time, the focus point position needs to be moved down by 0.1-0.5mm; (2) If the continuity assessment index is not within the continuity assessment threshold range, it means that there may be jitter during the cutting process. In this case, the cutting speed needs to be reduced (generally, the cutting speed should not exceed 60% of the single cutting speed to ensure the stability of the cutting process); (3) If the cutting quality evaluation value is not within the cutting quality evaluation threshold range, it means that the cutting accuracy is low. At this time, the acceleration adjustment amount needs to be reduced to reduce the cutting speed; (4) The auxiliary gas flow rate is obtained through the deployed air pressure sensor. The auxiliary gas plays a role in purging slag and protecting the lens during the laser cutting process. If the gas pressure increases, the cutting speed will be reduced. At this time, the auxiliary gas flow rate needs to be reduced. If the gas pressure decreases, it will cause discontinuous weld formation. At this time, the auxiliary gas flow rate needs to be increased.

[0023] The cutting quality evaluation threshold range represents the range corresponding to the maximum and minimum values ​​of the historical cutting quality evaluation values ​​of the historical laser cutting heads in the preset database.

[0024] In summary, during the laser cutting process, the parameter setting module can reduce the vibration and wear of the laser and the laser cutting head by dynamically adjusting and setting the cutting parameter values ​​of the laser cutting head during the laser cutting process, thereby achieving improved stability of the laser cutting equipment during accelerated laser cutting operations; secondly, by precisely controlling the output power and auxiliary gas flow rate, overburning and slag generation can be avoided, thereby protecting the laser cutting head and cutting materials, thereby realizing automatic control and parameter optimization, and improving production efficiency and safety.

[0025] Furthermore, the specific steps of determining whether to send a laser emission instruction based on the laser beam data and the laser beam parameter threshold range include: A1, determining whether the emission intensity is within the emission intensity threshold range, if so, executing A2, otherwise adjusting the laser emission instruction until the re-acquired emission intensity is within the emission intensity threshold range; A2, determining whether the emission frequency is within the emission frequency threshold range, if so, executing A3, otherwise adjusting the laser emission instruction until the re-acquired emission frequency is within the emission frequency threshold range; A3, sending a laser emission instruction to the focusing control module, the laser emission instruction is used to control the switch and output power of the laser before the laser cutting operation.

[0026] In this embodiment, the emission intensity threshold range represents the range corresponding to the maximum and minimum values ​​of the historical emission intensity of the historical laser in the preset database, and the emission frequency threshold range represents the range corresponding to the maximum and minimum values ​​of the historical emission frequency of the historical laser in the preset database.

[0027] In actual laser cutting operations, in order to ensure the quality and efficiency of laser cutting, operators need to pay close attention to the two parameters of emission intensity and emission frequency. Once they are found to deviate from the laser beam parameter threshold range, the laser emission instructions (including switch instructions and output power instructions) need to be adjusted immediately. This adjustment usually includes increasing the initial setting value of the laser input parameters (such as increasing the output power and increasing the pulse width) to ensure that the laser beam data is within the laser beam parameter threshold range, thereby achieving more accurate execution of the laser cutting operation.

[0028] Furthermore, the process of obtaining the focus point control value is as follows: when the emission intensity is within the emission intensity threshold range and the emission frequency is within the emission frequency threshold range, the real-time reflectivity and real-time thermal conductivity data of the material to be cut in the preset laser cutting area are obtained, and the material characteristic influence coefficient is obtained by combining the reference reflectivity and reference thermal conductivity data of the material to be cut. The material characteristic influence coefficient is used to reflect the influence of the characteristics of the material to be cut on the determination of the focal point position of the laser cutting head; the actual output power and actual focal point position of the laser before the laser cutting operation are obtained, and the output power influence coefficient is obtained by combining the reference output power and the upper and lower limits of the preset focus point area. and focal point position influence coefficient, the output power influence coefficient is the ratio of the absolute value of the difference between the actual output power and the reference output power to the reference output power, the focal point position influence coefficient is the ratio of the absolute value of the difference between the actual focal point position and the lower limit of the preset focus point area to the difference between the upper and lower limits, and the difference between the upper and lower limits is the difference between the upper limit of the preset focus point area and the lower limit of the preset focus point area; the preset material property influence coefficient correction factor, output power influence coefficient correction factor and focal point position influence coefficient correction factor are obtained from the preset database, and the focus point control value is obtained by combining the obtained material property influence coefficient, output power influence coefficient and focal point position influence coefficient.

[0029] Among them, the material property influence coefficient is the sum of the first material property influence coefficient and the second material property influence coefficient, the first material property influence coefficient represents the ratio of the absolute value of the difference between the real-time reflectivity and the reference reflectivity to the reference reflectivity, and the second material property influence coefficient represents the ratio of the absolute value of the difference between the real-time thermal conduction data and the reference thermal conduction data to the reference thermal conduction data.

[0030] In this embodiment, the real-time reflectivity is obtained by a spectrometer, the real-time heat conduction data is the ratio of the average surface temperature of the material to be cut within a preset time period (obtained by a deployed temperature sensor) to the area of ​​the material to be cut, the reference reflectivity is represented by the sum and average of the historical reflectivities of the historical materials to be cut in the preset database, the reference heat conduction data is represented by the sum and average of the historical heat conduction data of the historical materials to be cut in the preset database, the upper limit of the preset focus area and the lower limit of the preset focus area are set by the preset personnel, the reference output power is represented by the sum and average of the historical output powers of the historical lasers in the preset database, and the actual output power is obtained by the deployed power sensor.

[0031] Specifically, the material property influence coefficient correction factor is the correction factor corresponding to the process of obtaining the focus point control value in the preset database, which represents the correction value of the degree of influence of the material property influence coefficient on the focus point control value. When used, the material property influence coefficient correction factor corresponding to the material property influence coefficient can be directly obtained from the preset database. The corresponding relationship can be a pre-set mapping relationship. For example, the material property influence coefficient corresponding to the material property influence coefficient in the process of obtaining the focus point control value and the correction factor corresponding to the material property influence coefficient in the preset database form a mapping set, and the real-time material property influence coefficient is input into the mapping set to obtain the corresponding material property influence coefficient correction factor. The mapping relationship can be one-to-one or many-to-one. The value range of the material property influence coefficient correction factor in this example is .

[0032] The output power influence coefficient correction factor is the correction factor corresponding to the process of obtaining the focus point control value in the preset database, which represents the correction value of the degree of influence of the output power influence coefficient on the focus point control value. When used, the output power influence coefficient correction factor corresponding to the output power influence coefficient can be directly obtained from the preset database. The corresponding relationship can be a pre-set mapping relationship. For example, the output power influence coefficient corresponding to the output power influence coefficient in the process of obtaining the focus point control value and the correction factor corresponding to the output power influence coefficient in the preset database form a mapping set, and the real-time output power influence coefficient is input into the mapping set to obtain the corresponding output power influence coefficient correction factor. The mapping relationship can be one-to-one or many-to-one. The value range of the output power influence coefficient correction factor in this example is .

[0033] It should be noted that the sum of the material property influence coefficient correction factor, the output power influence coefficient correction factor and the focal point position influence coefficient correction factor is 1.

[0034] This example can quickly calculate the focus point control value by obtaining the preset correction factor from the preset database without the need for tedious experiments and adjustments. It can realize automatic control during the laser cutting process and improve cutting efficiency. Secondly, by precisely controlling the focal point position and output power of the laser cutting head, it can reduce the heat affected zone during the cutting process, reduce thermal deformation and thermal damage of the material, ensure energy stability during the laser cutting operation, and improve the accuracy and reliability of obtaining the focus point control value.

[0035] It should be understood that the specific limiting expression of the focus control value is: ; ; ; ; Where y is the number of the preset laser cutting area, , Y is the total number of preset laser cutting areas, e is a natural constant, Indicates the focus point control value of the laser cutting head in the yth preset laser cutting area, represents the correction factor of the influence coefficient of material properties, It represents the material property influence coefficient of the material to be cut in the yth preset laser cutting area. Indicates the real-time reflectivity of the material to be cut in the yth preset laser cutting area. represents the reference reflectivity, Represents the real-time heat conduction data of the material to be cut in the yth preset laser cutting area, represents the reference heat conduction data, Indicates the output power influence coefficient correction factor, It represents the output power influence coefficient of the laser in the yth preset laser cutting area, It represents the actual output power of the laser in the yth preset laser cutting area. represents the reference output power, Indicates the correction factor of the focal point position influence coefficient, It represents the influence coefficient of the focal point position of the laser cutting head in the yth preset laser cutting area. Indicates the actual focal point position of the laser cutting head in the yth preset laser cutting area, Indicates the upper limit of the preset focus area. Indicates the lower limit of the preset focus area. It represents the emission intensity of the laser in the yth preset laser cutting area. represents the emission intensity threshold range, Indicates the emission frequency of the laser in the yth preset laser cutting area, Indicates the transmit frequency threshold range.

[0036] The statistical table of changes in the focus point control value is shown in Table 1: Table 1 Statistics of changes in focus point control values

[0037] It should be understood that the focus point control value decreases with the increase of the material property influence coefficient, the output power influence coefficient and the focal point position influence coefficient; the focal point position influence coefficient increases with the increase of the distance between the actual focal point position and the lower limit of the preset focus point area; the material property influence coefficient increases with the increase of the reflectivity deviation value and the thermal conduction deviation data; the output power influence coefficient increases with the increase of the output power deviation value, wherein the reflectivity deviation value is the absolute value of the difference between the real-time reflectivity and the reference reflectivity, the thermal conduction deviation data is the absolute value of the difference between the real-time thermal conduction data and the reference thermal conduction data, and the output power deviation value is the absolute value of the difference between the actual output power and the reference output power.

[0038] It should be noted that the output power influence coefficient also indirectly affects the value of the material property influence coefficient. When the actual output power of the laser increases, the corresponding output power influence coefficient also increases. At this time, the energy of the laser beam increases, resulting in a decrease in the surface reflectivity of the material to be cut, thereby reducing the value of the material property influence coefficient, thereby helping the laser cutting head to maintain higher stability during the accelerated laser cutting operation, thereby achieving improved stability of the laser cutting equipment during the accelerated laser cutting operation, and effectively solving the problem of low stability of the laser cutting equipment during the accelerated laser cutting operation in the prior art.

[0039] Furthermore, the specific process of judging whether the laser cutting head performs a laser cutting operation before the laser cutting operation based on the focus point control value is as follows: judging whether the acquired focus point control value is within the focus point control threshold range: if the acquired focus point control value is within the focus point control threshold range, it indicates that the laser cutting head is within the preset focus point area and performs a laser cutting operation; if the acquired focus point control value is not within the focus point control threshold range, it indicates that the laser cutting head is not within the preset focus point area, and the laser cutting operation is not performed at this time, and the focal length of the laser cutting head is adjusted.

[0040] In this embodiment, the focus point control threshold range represents the range corresponding to the maximum and minimum values ​​of the historical focus point control values ​​of the historical laser cutting head in the preset database, and the preset focus point area is the working area of ​​the laser cutting head in the preset laser cutting area; when the laser cutting head (with autofocus function) is not within the preset focus point area, it is necessary to monitor the focal length in real time through the sensor and automatically adjust it until the laser cutting head performs laser cutting operation within the preset focus point area.

[0041] This example ensures that the laser beam is accurately focused within the preset focus area by ensuring that the focus point control value is within the threshold range, which helps to improve the quality of the cutting edge, reduce burrs and unevenness, and thus achieve more precise laser cutting operations.

[0042] Furthermore, the method for obtaining the continuity evaluation index is as follows: B1, when the acquired focus point control value is within the focus point control threshold range, the initial cutting speed of the laser cutting head before the laser cutting operation is performed within the preset time period and the initial smoothness of the material to be cut are obtained, and the average cutting speed of the laser cutting head during the laser cutting operation within the preset time period and the average smoothness of the cut of the material to be cut are obtained; B2, determine whether the average cutting speed is within the cutting speed threshold range, if so, execute B3, otherwise adjust the output power of the laser and re-obtain the average cutting speed, until the re-obtained average cutting speed is within the cutting speed threshold range and then execute B3; B3, obtain the cutting speed evaluation index and the smoothness evaluation index and perform addition and summation operations to obtain the cutting evaluation coefficient, add the cutting evaluation coefficient to the acquired focus point control value and then perform logarithmic operations to obtain the continuity evaluation index, the cutting speed evaluation index represents the ratio of the absolute value of the difference between the average cutting speed and the initial cutting speed to the initial cutting speed, and the smoothness evaluation index represents the ratio of the absolute value of the difference between the average smoothness and the initial smoothness to the initial cutting speed.

[0043] In this embodiment, the focus point control threshold range represents the range corresponding to the maximum and minimum values ​​of the historical focus point control values ​​of the historical laser cutting head in the preset database, the average cutting speed is the average value of the cutting speed of the laser cutting head within the preset time period, the average smoothness is the average value of the smoothness of the material to be cut within the preset time period (obtained by the friction sensor), and the cutting speed threshold range represents the range corresponding to the maximum and minimum values ​​of the historical cutting speed of the historical laser cutting head in the preset database.

[0044] Specifically, the specific restricted expression of the continuity evaluation index is: ; ; ; ; Where y is the number of the preset laser cutting area, , Y is the total number of preset laser cutting areas, t is the number of preset time periods, , T is the total number of preset time periods, e is a natural constant, It indicates the continuity evaluation index of the laser cutting head in the preset time period corresponding to the yth preset laser cutting area. Indicates the focus point control value of the laser cutting head in the yth preset laser cutting area, It represents the cutting evaluation coefficient of the laser cutting head in the preset time period corresponding to the yth preset laser cutting area. It represents the cutting speed evaluation index of the laser cutting head in the yth preset laser cutting area corresponding to the tth preset time period, It represents the smoothness evaluation index of the material to be cut in the yth preset laser cutting area corresponding to the tth preset time period, It represents the average cutting speed of the laser cutting head in the yth preset laser cutting area corresponding to the tth preset time period, It represents the initial cutting speed of the laser cutting head in the yth preset laser cutting area corresponding to the tth preset time period, It represents the average smoothness of the material to be cut in the yth preset laser cutting area corresponding to the tth preset time period. It represents the initial smoothness of the material to be cut in the yth preset laser cutting area corresponding to the tth preset time period, Indicates the focus control threshold range, Indicates the cutting speed threshold range.

[0045] Specifically, the cutting evaluation coefficient increases with the increase of the cutting speed evaluation index and the smoothness evaluation index, wherein the smoothness evaluation index increases with the increase of the average smoothness; the continuity evaluation index increases with the increase of the focus point control value, and the continuity evaluation index increases with the increase of the cutting evaluation coefficient; it should be understood that the initial cutting speed and the initial smoothness are the values ​​before the laser cutting head starts running in the preset time period. When the initial cutting speed is 0, it indicates that the laser cutting head has not performed laser cutting operation within the preset time period. At this time, the corresponding cutting speed evaluation index is equal to the average cutting speed. When the initial cutting speed is not 0, the cutting speed evaluation index increases with the increase of the average cutting speed.

[0046] It should be noted that the focus point control value also indirectly affects the value of the cutting evaluation coefficient. When the focus point control value is reduced, the laser beam focus of the laser may be unstable, resulting in an uneven cutting edge of the material to be cut, which in turn leads to poor cutting effect. When the focus point control value increases, the laser beam focus stability increases, and the material can be cut more accurately. At this time, the cutting evaluation coefficient will also increase accordingly. The above-mentioned indirect influence relationship helps to more clearly understand the cutting effect during the laser cutting operation, reduces the error during the laser cutting operation, and thus achieves the improvement of the stability of the laser cutting equipment during the accelerated laser cutting operation, effectively solving the problem of low stability of the laser cutting equipment during the accelerated laser cutting operation in the prior art.

[0047] Furthermore, the specific process of comparing the continuity evaluation index with the continuity evaluation threshold range to determine whether to perform the accelerated laser cutting operation is as follows: determine whether the obtained continuity evaluation index is within the continuity evaluation threshold range: if the obtained continuity evaluation index is within the continuity evaluation threshold range, it indicates that the laser cutting head within the preset time period is performing a continuous laser cutting operation and performing an accelerated laser cutting operation; if the obtained continuity evaluation index is not within the continuity evaluation threshold range, it indicates that the laser cutting operation of the laser cutting head within the preset time period is unstable. At this time, the accelerated laser cutting operation is not performed and the cutting data is adjusted. The laser cutting operation is performed again within the next preset time period according to the adjusted cutting data.

[0048] In this embodiment, the continuity evaluation threshold range represents the range corresponding to the maximum and minimum values ​​of the historical continuity evaluation index of the historical laser cutting head in the preset database. If the continuity evaluation index is not within the continuity evaluation threshold range, it indicates that the laser cutting operation of the laser cutting head is unstable, which may be caused by various factors (such as material changes, equipment failure). At this time, the laser cutting operation should be suspended and accelerated, and the cutting data should be adjusted to ensure that the laser cutting operation within the next preset time period can be carried out stably. For example, the cutting speed of the laser cutting head within the preset time period can be reduced (for example, the cutting speed displayed on the laser is reduced from 10m / min to 8m / min) to ensure that the average cutting speed is reduced, thereby achieving stable operation of the laser cutting head.

[0049] Furthermore, a cutting quality evaluation value is obtained based on the cutting state of the laser cutting head during the accelerated laser cutting operation. The above also includes comparing the average cutting speed during the laser cutting operation with the cutting speed threshold range. The specific process is: determine whether the average cutting speed is equal to the maximum cutting speed within the cutting speed threshold range: if the average cutting speed is equal to the maximum cutting speed within the cutting speed threshold range, then continue the laser cutting operation at the maximum cutting speed at this time; if the average cutting speed is not equal to the maximum cutting speed within the cutting speed threshold range, then adjust the cutting speed and obtain the acceleration adjustment amount until the average cutting speed is equal to the maximum cutting speed within the cutting speed threshold range. The acceleration adjustment amount is the ratio of the difference between the maximum cutting speed and the average cutting speed to the total duration of the preset time period.

[0050] In this embodiment, it should be understood that the accelerated laser cutting operation refers to the operation in which the acceleration adjustment amount is added to the cutting speed during the laser cutting operation. As long as the cutting speed of the laser cutting head during the laser cutting operation is within the cutting speed threshold range, it indicates that the laser cutting head is running stably and continuously within the preset time period, and the maximum cutting speed is the result of summing and averaging the maximum cutting speeds of the laser cutting head in the historical time period in the preset database; the acceleration adjustment amount serves as a bridge connecting the average cutting speed and the maximum cutting speed, which helps the laser cutting equipment to maximize production efficiency, reduce energy consumption and costs, increase equipment life and realize intelligent control while ensuring cutting quality.

[0051] Furthermore, the specific steps for obtaining the cutting quality evaluation value are as follows: C1, determine whether the acceleration adjustment amount is equal to 0, if so, execute C2, otherwise execute C3; C2, obtain the first auxiliary gas coefficient of the laser cutting head during the laser cutting operation, and perform an exponential operation on the result of adding the continuity evaluation index within the continuity evaluation threshold range to the first auxiliary gas coefficient to obtain the cutting quality evaluation value, the first auxiliary gas coefficient is the ratio of the first auxiliary gas flow rate to the reference first auxiliary gas flow rate, and the first auxiliary gas flow rate is the flow rate of the auxiliary gas corresponding to the laser cutting head during the laser cutting operation; C3, obtain the second auxiliary gas coefficient of the laser cutting head during the accelerated laser cutting operation, and perform an exponential operation on the result of adding the continuity evaluation index within the continuity evaluation threshold range to the second auxiliary gas coefficient to obtain the cutting quality evaluation value, the second auxiliary gas coefficient is the ratio of the second auxiliary gas flow rate to the reference second auxiliary gas flow rate, and the second auxiliary gas flow rate is the flow rate of the auxiliary gas corresponding to the accelerated laser cutting head during the laser cutting operation.

[0052] In this embodiment, the specific limiting expression of the cutting quality evaluation value is: ; ; ; Where y is the number of the preset laser cutting area, , Y is the total number of preset laser cutting areas, e is a natural constant, It represents the cutting quality evaluation value of the laser cutting head in the yth preset laser cutting area corresponding to the preset time period. It represents the first auxiliary gas coefficient of the laser cutting head in the laser cutting operation process corresponding to the yth preset laser cutting area, represents the first auxiliary gas flow rate of the laser cutting head during the laser cutting operation corresponding to the yth preset laser cutting area, Indicates the reference first auxiliary gas flow rate, It represents the second auxiliary gas coefficient of the laser cutting head in the yth preset laser cutting area corresponding to the accelerated laser cutting operation process, It indicates the flow rate of the second auxiliary gas of the laser cutting head in the process of accelerating the laser cutting operation in the yth preset laser cutting area. Indicates the reference second auxiliary gas flow rate, Indicates the acceleration adjustment amount, It indicates the continuity evaluation index of the laser cutting head in the preset time period corresponding to the yth preset laser cutting area. Indicates the continuity assessment threshold range.

[0053] Specifically, 1, , the reference first auxiliary gas flow rate is represented by the sum and average of the maximum values ​​of the corresponding auxiliary gas flow rates during the laser operation of the laser cutting head in the historical time period in the preset database, and the reference second auxiliary gas flow rate is represented by the sum and average of the maximum values ​​of the corresponding auxiliary gas flow rates during the accelerated laser operation of the laser cutting head in the historical time period in the preset database; when When , the cutting quality evaluation value increases with the increase of the first auxiliary gas coefficient and the continuity evaluation index. , the cutting quality evaluation value increases with the increase of the second auxiliary gas coefficient and the continuity evaluation index, wherein the first auxiliary gas coefficient increases with the increase of the first auxiliary gas flow rate, and the second auxiliary gas coefficient increases with the increase of the second auxiliary gas flow rate, and the first auxiliary gas flow rate and the second auxiliary gas flow rate are measured in real time by the deployed air pressure sensor.

[0054] It should be noted that the continuity evaluation index also indirectly affects the values ​​of the first auxiliary gas coefficient and the second auxiliary gas coefficient. When the continuity evaluation index increases, it indicates that the laser cutting head is performing laser cutting operations stably and continuously. At this time, the corresponding first auxiliary gas flow rates and second auxiliary gas flow rates increase accordingly, that is, the increase in the continuity evaluation index will also increase the values ​​of the first auxiliary gas coefficient and the second auxiliary gas coefficient, thereby ensuring that the laser cutting head can accurately perform laser cutting operations while also improving efficiency, thereby achieving improved stability of the laser cutting equipment during accelerated laser cutting operations, and effectively solving the problem of low stability of the laser cutting equipment during accelerated laser cutting operations in the prior art.

[0055] like Figure 2 As shown, it is a flow chart of the laser cutting control method provided by the embodiment of the present application. The laser cutting control method provided by the embodiment of the present application includes the following steps: Step 1, laser beam data judgment: obtain the laser beam data of the laser in the preset laser cutting area, and judge whether to send a laser emission instruction according to the laser beam data and the laser beam parameter threshold range. The laser is stored in a specified laser cutting device. The temperature and humidity of the laser in the preset laser cutting area are constant. The laser beam data includes the emission intensity and the emission frequency. The laser beam parameter threshold range includes the emission intensity threshold range and the emission frequency threshold range; Step 2, obtain the focus point control value: receive the laser emission instruction and monitor the focal length state of the laser cutting head in real time to obtain the focus point control value, automatically adjust the focal length and position of the laser cutting head according to the focus point control value and send a cutting instruction, and at the same time judge whether the laser cutting head performs the laser cutting operation before the laser cutting operation based on the focus point control value. The focus point control value is used to evaluate the accuracy of the focal length position of the laser cutting head. The cutting instruction The command is used to control the laser cutting head in the laser to perform laser cutting operation on the material to be cut; step three, obtain the continuity evaluation index: monitor the changes of the cutting data of the laser cutting head in real time during the laser cutting operation to obtain the continuity evaluation index, compare the continuity evaluation index with the continuity evaluation threshold range to determine whether to perform the accelerated laser cutting operation, the cutting data includes the cutting path and the cutting speed, and the continuity evaluation index is used to evaluate the continuity and stability of the laser cutting head during the laser cutting operation; step four, obtain the cutting quality evaluation value: obtain the cutting quality evaluation value according to the cutting state of the laser cutting head during the accelerated laser cutting operation, set the cutting parameter value of the laser cutting head during the laser cutting process according to the acquired focus point control value, continuity evaluation index and cutting quality evaluation value, the cutting quality evaluation value is used to reflect the accuracy of the material to be cut during the accelerated laser cutting operation, and the cutting parameter value includes the cutting data, focal length, output power and auxiliary gas flow rate of the laser cutting head.

[0056] In this embodiment, in actual application, the actual output power, actual focal point position, average cutting speed and first auxiliary gas flow rate of the laser cutting head in the previous preset time period are set as the cutting parameter values ​​of the laser cutting head in the current time period.

[0057] Specifically, Figure 3 As shown, it is a flow chart for setting the cutting parameter values ​​provided in an embodiment of the present application. In the application scenario of metal plate parts, by real-time monitoring of the laser beam data and the focus point control value, the system can ensure that the laser beam is accurately focused on the metal plate to achieve high-precision cutting. Secondly, according to the judgment of the continuity evaluation index, it is ensured that no jitter or deviation occurs during the accelerated cutting process, thereby ensuring the consistency and stability of the cutting effect.

[0058] To summarize, the embodiment of the present application determines whether to send a laser emission instruction through laser beam data and a laser beam parameter threshold range, and determines whether the laser cutting head performs a laser cutting operation before the laser cutting operation based on the acquired focus point control value, and then compares the acquired continuity evaluation index with the continuity evaluation threshold range to determine whether to perform an accelerated laser cutting operation, and finally sets the cutting parameter value according to the acquired focus point control value, continuity evaluation index and cutting quality evaluation value, thereby achieving an improvement in the accuracy of the laser cutting operation, and then achieving an improvement in the stability of the laser cutting equipment during the accelerated laser cutting operation, effectively solving the problem of low stability of the laser cutting equipment during the accelerated laser cutting operation in the prior art.

[0059] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0060] The present invention is described with reference to flowcharts and / or block diagrams of systems, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks 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, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1A device that provides the functions specified in a block or multiple blocks.

[0061] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0062] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0063] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0064] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. Laser cutting control system, characterized in that, include: Laser emission control module, focusing control module, continuity control module and parameter setting module; The laser emission control module is used to obtain laser beam data of the laser in a preset laser cutting area, and determine whether to send a laser emission instruction according to the laser beam data and a laser beam parameter threshold range, wherein the laser beam data includes emission intensity and emission frequency; The focus control module is used to receive the laser emission instruction and monitor the focal length state of the laser cutting head in real time to obtain the focus point control value, automatically adjust the focus and position of the laser cutting head according to the focus point control value and send the cutting instruction, and at the same time determine whether the laser cutting head performs the laser cutting operation before the laser cutting operation based on the focus point control value; The continuity control module is used to monitor in real time the changes of the cutting data of the laser cutting head during the laser cutting operation to obtain a continuity evaluation index, and compare the continuity evaluation index with the continuity evaluation threshold range to determine whether to perform an accelerated laser cutting operation, wherein the cutting data includes a cutting path and a cutting speed; The parameter setting module is used to obtain a cutting quality evaluation value according to the cutting state of the laser cutting head during the accelerated laser cutting operation, and to set a cutting parameter value of the laser cutting head during the laser cutting process according to the obtained focus point control value, continuity evaluation index and cutting quality evaluation value; The specific limiting expression of the focus point control value is: ； ； ； ； Where y is the number of the preset laser cutting area, , Y is the total number of preset laser cutting areas, e is a natural constant, Indicates the focus point control value of the laser cutting head in the yth preset laser cutting area, represents the correction factor of the influence coefficient of material properties, It represents the material property influence coefficient of the material to be cut in the yth preset laser cutting area. Indicates the real-time reflectivity of the material to be cut in the yth preset laser cutting area. represents the reference reflectivity, Represents the real-time heat conduction data of the material to be cut in the yth preset laser cutting area, represents the reference heat conduction data, Indicates the output power influence coefficient correction factor, It represents the output power influence coefficient of the laser in the yth preset laser cutting area, It represents the actual output power of the laser in the yth preset laser cutting area. represents the reference output power, Indicates the correction factor of the focal point position influence coefficient, It represents the influence coefficient of the focal point position of the laser cutting head in the yth preset laser cutting area. Indicates the actual focal point position of the laser cutting head in the yth preset laser cutting area, Indicates the upper limit of the preset focus area. Indicates the lower limit of the preset focus area. It represents the emission intensity of the laser in the yth preset laser cutting area. represents the emission intensity threshold range, Indicates the emission frequency of the laser in the yth preset laser cutting area, Indicates the transmit frequency threshold range.

2. The laser cutting control system according to claim 1, characterized in that: The specific steps of judging whether to send a laser emission instruction according to the laser beam data and the laser beam parameter threshold range include: A1, determine whether the emission intensity is within the emission intensity threshold range, if so, execute A2, otherwise adjust the laser emission instruction until the re-acquired emission intensity is within the emission intensity threshold range; A2, determining whether the emission frequency is within the emission frequency threshold range, if so, executing A3, otherwise adjusting the laser emission instruction until the re-acquired emission frequency is within the emission frequency threshold range; A3, sending a laser emission instruction to the focus control module, wherein the laser emission instruction is used to control the switch and output power of the laser before the laser cutting operation.

3. The laser cutting control system according to claim 1, characterized in that: The process of obtaining the focus point control value is as follows: Acquire the real-time reflectivity and real-time heat conduction data of the material to be cut in the preset laser cutting area, and combine the reference reflectivity and reference heat conduction data of the material to be cut to obtain the material property influence coefficient, which is used to reflect the influence of the material property to be cut on the determination of the focal point position of the laser cutting head; The actual output power and the actual focal point position of the laser before the laser cutting operation are obtained, and the output power influence coefficient and the focal point position influence coefficient are obtained by combining the reference output power and the upper and lower limits of the preset focal point area, wherein the output power influence coefficient is the ratio of the absolute value of the difference between the actual output power and the reference output power to the reference output power, and the focal point position influence coefficient is the ratio of the absolute value of the difference between the actual focal point position and the lower limit of the preset focal point area to the difference between the upper and lower limits; The preset material property influence coefficient correction factor, output power influence coefficient correction factor and focal point position influence coefficient correction factor are obtained from the preset database, and the focus point control value is obtained by combining the obtained material property influence coefficient, output power influence coefficient and focal point position influence coefficient.

4. The laser cutting control system according to claim 1, characterized in that: The specific process of judging whether the laser cutting head performs a laser cutting operation before the laser cutting operation based on the focus point control value is as follows: Determine whether the acquired focus point control value is within the focus point control threshold range: If the acquired focus point control value is within the focus point control threshold range, the laser cutting operation is performed; If the acquired focus point control value is not within the focus point control threshold range, the laser cutting operation is not performed and the focal length of the laser cutting head is adjusted.

5. The laser cutting control system according to claim 1, characterized in that: The method for obtaining the continuity assessment index is as follows: B1, obtaining the initial cutting speed of the laser cutting head before the laser cutting operation is performed within a preset time period and the initial smoothness of the material to be cut, and obtaining the average cutting speed of the laser cutting head during the laser cutting operation within the preset time period and the average smoothness of the cut of the material to be cut; B2, determine whether the average cutting speed is within the cutting speed threshold range, if so, execute B3, otherwise adjust the output power of the laser until the re-acquired average cutting speed is within the cutting speed threshold range and then execute B3; B3, obtain the cutting speed evaluation index and the smoothness evaluation index and perform addition operation to obtain the cutting evaluation coefficient, add the cutting evaluation coefficient and the acquired focus point control value and then perform logarithmic operation to obtain the continuity evaluation index, the cutting speed evaluation index represents the ratio of the absolute value of the difference between the average cutting speed and the initial cutting speed to the initial cutting speed, and the smoothness evaluation index represents the ratio of the absolute value of the difference between the average smoothness and the initial smoothness to the initial cutting speed.

6. The laser cutting control system according to claim 1, characterized in that: The specific process of comparing the continuity evaluation index with the continuity evaluation threshold range to determine whether to perform the accelerated laser cutting operation is as follows: Determine whether the obtained continuity assessment index is within the continuity assessment threshold range: If the obtained continuity evaluation index is within the continuity evaluation threshold range, the accelerated laser cutting operation is performed; If the obtained continuity evaluation index is not within the continuity evaluation threshold range, the cutting data is adjusted, and the laser cutting operation is performed again within the next preset time period according to the adjusted cutting data.

7. The laser cutting control system according to claim 1, characterized in that: The method of obtaining a cutting quality evaluation value according to the cutting state of the laser cutting head during the accelerated laser cutting operation also includes comparing the average cutting speed during the laser cutting operation with the cutting speed threshold range. The specific process is as follows: Determine whether the average cutting speed is equal to the maximum cutting speed within the cutting speed threshold range: If the average cutting speed is equal to the maximum cutting speed within the cutting speed threshold range, the laser cutting operation continues; If the average cutting speed is not equal to the maximum cutting speed within the cutting speed threshold range, the cutting speed is adjusted and the acceleration adjustment amount is obtained until the average cutting speed is equal to the maximum cutting speed within the cutting speed threshold range, and the acceleration adjustment amount is the ratio of the difference between the maximum cutting speed and the average cutting speed to the total duration of the preset time period.

8. The laser cutting control system according to claim 1, characterized in that: The specific steps for obtaining the cutting quality evaluation value are as follows: C1, determine whether the acceleration adjustment amount is equal to 0, if so, execute C2, otherwise execute C3; C2, obtaining a first auxiliary gas coefficient of the laser cutting head during the laser cutting operation, performing an exponential operation on the result of adding the continuity evaluation index within the continuity evaluation threshold range to the first auxiliary gas coefficient to obtain a cutting quality evaluation value, wherein the first auxiliary gas coefficient is a ratio of the first auxiliary gas flow rate to the reference first auxiliary gas flow rate, and the first auxiliary gas flow rate is the flow rate of the corresponding auxiliary gas of the laser cutting head during the laser cutting operation; C3, obtain the second auxiliary gas coefficient of the laser cutting head during the accelerated laser cutting operation, and perform exponential operation on the result of adding the continuity evaluation index within the continuity evaluation threshold range and the second auxiliary gas coefficient to obtain a cutting quality evaluation value. The second auxiliary gas coefficient is the ratio of the second auxiliary gas flow rate to the reference second auxiliary gas flow rate. The second auxiliary gas flow rate is the flow rate of the corresponding auxiliary gas during the accelerated laser cutting head during the laser cutting operation.

9. A laser cutting control method, characterized in that: The following steps are involved: Step 1: acquiring laser beam data of the laser in a preset laser cutting area, and determining whether to send a laser emission instruction according to the laser beam data and a laser beam parameter threshold range, wherein the laser beam data includes emission intensity and emission frequency; Step 2, receiving the laser emission instruction and monitoring the focal length state of the laser cutting head in real time to obtain the focus point control value, automatically adjusting the focal length and position of the laser cutting head according to the focus point control value and sending the cutting instruction, and judging whether the laser cutting head performs the laser cutting operation before the laser cutting operation based on the focus point control value; Step 3: monitor in real time the changes of the cutting data of the laser cutting head during the laser cutting operation to obtain a continuity evaluation index, and compare the continuity evaluation index with the continuity evaluation threshold range to determine whether to perform an accelerated laser cutting operation, wherein the cutting data includes a cutting path and a cutting speed; Step 4: obtaining a cutting quality evaluation value according to the cutting state of the laser cutting head during the accelerated laser cutting operation, and setting a cutting parameter value of the laser cutting head during the laser cutting process according to the obtained focus point control value, continuity evaluation index and cutting quality evaluation value; The specific limiting expression of the focus point control value is: ； ； ； ； Where y is the number of the preset laser cutting area, , Y is the total number of preset laser cutting areas, e is a natural constant, Indicates the focus point control value of the laser cutting head in the yth preset laser cutting area, represents the correction factor of the influence coefficient of material properties, It represents the material property influence coefficient of the material to be cut in the yth preset laser cutting area. Indicates the real-time reflectivity of the material to be cut in the yth preset laser cutting area. represents the reference reflectivity, Represents the real-time heat conduction data of the material to be cut in the yth preset laser cutting area, represents the reference heat conduction data, Indicates the output power influence coefficient correction factor, It represents the output power influence coefficient of the laser in the yth preset laser cutting area, It represents the actual output power of the laser in the yth preset laser cutting area. represents the reference output power, Indicates the correction factor of the focal point position influence coefficient, It represents the influence coefficient of the focal point position of the laser cutting head in the yth preset laser cutting area. Indicates the actual focal point position of the laser cutting head in the yth preset laser cutting area, Indicates the upper limit of the preset focus area. Indicates the lower limit of the preset focus area. It represents the emission intensity of the laser in the yth preset laser cutting area. represents the emission intensity threshold range, Indicates the emission frequency of the laser in the yth preset laser cutting area, Indicates the transmit frequency threshold range.

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