Laser processing method, device, equipment and system for metal workpiece

Abstract

The invention relates to the technical field of laser cutting control, in particular to a laser machining method, device, equipment and system for a metal workpiece. According to the method, the reference cutting speed and the laser power range of a to-be-machined metal workpiece are counted in historical cutting data of a machined workpiece which is already machined. And according to the distribution volatility and the change degree of the scattering laser intensity, the processing low-quality degree of the current workpiece can be effectively quantified. The metal overheating probability is further obtained based on the workpiece surface temperature. And then the laser power adjustment direction in the current state can be determined according to the metal overheating probability, and power self-adaptive adjustment in the laser cutting process can be achieved by combining the power adjustment amount obtained by machining the low-quality degree. The quality state of the metal workpiece in the laser cutting process is monitored in real time, the laser cutting parameters are adjusted in a self-adaptive mode according to the quality state, and the cutting quality of the metal workpiece is guaranteed.

Description

Technical Field

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

[0002] Laser cutting is a common processing technology for metal workpieces, with the advantages of high speed, high precision, and non-contact. In the prior art, cutting parameters can be preset before laser cutting, so that metal workpieces can be automatically cut. However, in the actual cutting process, due to factors such as the material, surface condition, and thickness of the metal workpiece, the metal material's cutting feedback to the laser will change, making the cutting quality unstable, resulting in problems such as rough cutting edges, excessive heat-affected areas, or incomplete cutting. The laser cannot adaptively adjust the corresponding cutting parameters based on the real-time cutting quality feedback, so that quality problems cannot be solved. Summary of the invention

[0003] In order to solve the technical problem that the cutting parameters cannot be adaptively adjusted according to the cutting conditions in the laser cutting process of the prior art, the purpose of the present invention is to provide a laser processing method, device, equipment and system for metal workpieces. The technical solutions adopted are as follows:

[0004] The present invention provides a laser processing method for a metal workpiece, the method comprising:

[0005] Collect historical cutting data of processed workpieces of the same type as the metal workpiece to be processed; and obtain a reference cutting speed and a laser power range of the metal workpiece to be processed according to the historical cutting data;

[0006] Laser processing is performed on the metal workpiece to be processed based on the reference cutting speed; the scattered laser intensity and the workpiece surface temperature at each moment in the processing are obtained in a preset monitoring cycle; the degree of low processing quality is obtained according to the distribution volatility and variation degree of the scattered laser intensity in the monitoring cycle; the probability of metal overheating is obtained according to the size and increasing trend of the workpiece surface temperature;

[0007] The laser power adjustment direction is determined according to the metal overheating probability, and the power adjustment amount is obtained according to the processing low quality degree and the laser power range; the laser power is adjusted after a monitoring cycle ends according to the laser power adjustment direction and the power adjustment amount.

[0008] Furthermore, the method for obtaining the reference cutting speed includes:

[0009] The usage frequency, corresponding cutting power quantity, and corresponding cutting power range of all cutting speed categories in historical cutting data are counted; the fit of each cutting speed category is obtained according to the usage frequency, cutting power quantity and cutting power range; and the cutting speed category with the greatest fit is selected as the benchmark cutting speed.

[0010] Furthermore, the method for acquiring the laser power range includes:

[0011] The maximum and minimum values ​​of the laser power corresponding to the reference cutting speed in the historical cutting data are counted to obtain the laser power range.

[0012] Furthermore, the method for obtaining the low processing quality level includes:

[0013] The first scattered laser intensity collected in the monitoring cycle is used as the reference intensity; the standard deviation of the scattered laser intensity in the monitoring cycle is obtained; the laser intensity difference between the scattered laser intensity at each moment in the monitoring cycle and the reference intensity is obtained; and the degree of low processing quality is obtained based on the standard deviation and the laser intensity difference.

[0014] Furthermore, the method for obtaining the metal overheating probability includes:

[0015] The average workpiece surface temperature within the monitoring period is obtained; the workpiece surface temperature within the monitoring period constitutes a temperature sequence, the ratio of a latter element to a former element in the temperature sequence is used as the local growth rate, and the average local growth rate in the temperature sequence is counted; the metal overheating probability is obtained according to the average workpiece surface temperature and the average local growth rate.

[0016] Furthermore, the method for obtaining the laser power adjustment direction includes:

[0017] If the metal overheating probability is greater than a preset probability threshold, the laser power adjustment direction is set to a gain reduction adjustment; otherwise, the laser power adjustment direction is set to a gain adjustment.

[0018] Furthermore, the method for obtaining the power adjustment amount includes:

[0019] After the processing low quality degree is normalized, it is multiplied by the interval length of the laser power range to obtain the power adjustment amount.

[0020] The present invention also provides a laser processing device for a metal workpiece, the device comprising:

[0021] The laser cutting initial setting module is used to collect historical cutting data of processed workpieces of the same type as the metal workpiece to be processed; and obtain the benchmark cutting speed and laser power range of the metal workpiece to be processed according to the historical cutting data;

[0022] The laser cutting information analysis module is used to perform laser processing on the metal workpiece to be processed based on the reference cutting speed; obtain the scattered laser intensity and the workpiece surface temperature at each moment during the processing in a preset monitoring cycle; obtain the degree of low processing quality according to the distribution volatility and variation degree of the heat dissipation laser intensity in the monitoring cycle; obtain the probability of metal overheating according to the size and increasing trend of the workpiece surface temperature;

[0023] The laser cutting parameter adjustment module is used to determine the laser power adjustment direction according to the metal overheating probability, obtain the power adjustment amount according to the processing low quality degree and the laser power range; and adjust the laser power according to the laser power adjustment direction and the power adjustment amount after a monitoring cycle ends.

[0024] The present invention also provides a laser processing device for a metal workpiece, wherein the device comprises a laser processing apparatus for a metal workpiece.

[0025] The present invention also proposes a laser processing system for a metal workpiece, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the processor implements any one of the steps of the laser processing method for a metal workpiece.

[0026] The present invention has the following beneficial effects:

[0027] In order to ensure basic cutting efficiency and cutting quality, the present invention counts the benchmark cutting speed and laser power range of the metal workpiece to be processed in the historical cutting data of the processed workpiece that has been processed, so as to ensure the effective cutting of the metal workpiece to be processed. Further considering that the laser beam will interact with the surface of the material during the cutting process, the scattered light intensity can reflect the change in cutting quality, so the low quality of the processing of the current workpiece can be effectively quantified according to the distribution volatility and change degree of the scattered laser intensity. The temperature information of the cutting area can intuitively characterize the reaction of the metal workpiece to the laser. Too high temperature will cause abnormal conditions such as thermal deformation, so the probability of metal overheating can be further obtained based on the surface temperature of the workpiece. Then, according to the probability of metal overheating, the direction of laser power adjustment in the current state can be determined, and the power adjustment amount obtained in combination with the low quality of processing can realize the adaptive adjustment of the power of the laser cutting process. The present invention ensures the cutting quality of the metal workpiece by real-time monitoring the quality state of the metal workpiece during the laser cutting process and adaptively adjusting the laser cutting parameters according to the quality state. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A flow chart of a laser processing method for a metal workpiece provided by one embodiment of the present invention;

[0030] Figure 2 A schematic diagram of laser scattering provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of a laser processing method, device, equipment and system for a metal workpiece according to the present invention, its specific implementation, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0032] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0033] The specific scheme of the laser processing method, device, equipment and system for a metal workpiece provided by the present invention is described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1 , which shows a flow chart of a laser processing method for a metal workpiece provided by an embodiment of the present invention, the method comprising:

[0035] Step S1: collecting historical cutting data of processed workpieces of the same type as the metal workpiece to be processed; and obtaining a reference cutting speed and a laser power range of the metal workpiece to be processed according to the historical cutting data.

[0036] In the process of laser cutting of metal workpieces, cutting speed and laser power are important parameters, which will directly affect the cutting quality and stability during the cutting process. If the cutting speed is too fast, the laser energy cannot fully act on the metal surface, resulting in incomplete melting of the metal, causing problems such as incomplete cutting, burning, burrs, etc.; if the cutting speed is too slow, the laser power will be too concentrated, causing too much heat to accumulate in the cutting area, causing local overheating of the metal and thermal effects. If the laser power is too low, the energy of the laser beam is not enough to melt the metal, resulting in poor cutting effect, low cutting efficiency and poor cutting surface quality; if the laser power is too high, it will cause the metal in the cutting area to overheat, resulting in pores, excessive molten pool, metal spatter and other problems.

[0037] Therefore, the embodiment of the present invention first needs to determine the reference cutting speed and laser power range of the metal workpiece to be processed during the formal processing. The embodiment of the present invention counts the historical cutting data of the same type of processed workpieces as the metal workpiece to be processed. Since the historical cutting data is the data that has completed laser cutting, the most suitable reference cutting speed and laser power range for the metal workpiece to be processed can be counted from the historical cutting data. It should be noted that in order to further ensure the adaptability of the two parameters, the historical cutting data should be data with better cutting quality.

[0038] Preferably, in an embodiment of the present invention, the method for obtaining the reference cutting speed includes:

[0039] Statistics are collected on the usage frequency of all cutting speed categories in historical cutting data, the corresponding cutting power quantity, and the corresponding cutting power range. For a cutting speed category, the greater its usage frequency in historical cutting data, the more this cutting speed can meet the cutting requirements of metal workpieces during the cutting process; if the number of cutting powers is large, it means that this cutting speed category can be matched with more cutting powers and has stronger executability in the actual cutting process; the greater the range of cutting power, the greater the span of cutting power matched with the current cutting speed category, and the stronger its adaptability to the metal workpiece.

[0040] The degree of conformity of each cutting speed category is obtained according to the frequency of use, the amount of cutting power and the range of cutting power; and the cutting speed category with the greatest degree of conformity is selected as the benchmark cutting speed.

[0041] In the embodiment of the present invention, the frequency of use, the amount of cutting power and the range of cutting power are normalized respectively and then multiplied to obtain the degree of fit. The normalization method is: the ratio of the data of each dimension to the maximum value of the dimension is taken as the normalization result.

[0042] Furthermore, after the reference cutting speed is determined, the maximum and minimum values ​​of the corresponding cutting power are found in the historical cutting data to determine the laser power range.

[0043] Step S2: Laser processing is performed on the metal workpiece to be processed based on the reference cutting speed; the scattered laser intensity and the workpiece surface temperature at each moment in the processing process are obtained in a preset monitoring cycle; the degree of low processing quality is obtained based on the distribution volatility and variation degree of the scattered laser intensity within the monitoring cycle; the probability of metal overheating is obtained based on the size and increasing trend of the workpiece surface temperature.

[0044] The embodiment of the present invention installs a fiber optic sensor and an infrared sensor on the metal laser equipment to monitor the actual state of the metal workpiece during the laser cutting process in real time. The fiber optic sensor is used to collect the intensity of scattered light scattered by the laser beam on the cutting area. The laser beam is transmitted to the cutting area through the optical fiber, and the reflected or scattered signal is transmitted back to the optical fiber to determine the intensity of the scattered light. The infrared sensor can determine the surface temperature of the cutting area by collecting the thermal information of the metal workpiece.

[0045] If the material is not completely cut or abnormal melting occurs, the characteristics of the scattered light will change. For example, when the metal workpiece is not completely cut or a thermal effect occurs, the interaction between the metal and the laser becomes more complicated, and the metal surface state becomes more complicated, resulting in different scattering patterns of the laser in the cutting area, making the directional distribution of the scattered light no longer uniform, resulting in fluctuating scattered light intensity, please refer to Figure 2 , which shows a schematic diagram of laser scattering provided by an embodiment of the present invention. Figure 2 In the figure, the vertical arrow is the direction of laser cutting, and the other arrows are the performance of laser scattered light under abnormal metal state of low-quality cutting. This abnormal scattering will lead to obvious uneven scattered light intensity. During normal cutting, the interaction between the laser and the metal workpiece is mainly local melting and evaporation. The scattered light has a uniform direction, mainly scattered along the propagation direction of the laser beam. And because the laser state and metal state are relatively stable during normal cutting, the intensity of the scattered light is also relatively stable. Therefore, the cutting quality of the metal workpiece under the current cutting process can be evaluated by the distribution volatility and degree of change of the scattered light intensity collected, and the degree of processing low quality can be obtained.

[0046] Furthermore, considering that laser overheating can cause the surface temperature of the metal workpiece to rise sharply, causing thermal effects on the metal, affecting the cutting quality, and causing abnormal conditions such as thermal deformation of the metal. Therefore, the metal overheating probability of the current metal workpiece can be obtained by analyzing the surface temperature of the metal workpiece and evaluating whether it has an increasing trend.

[0047] Therefore, in the embodiment of the present invention, during the laser processing of the metal workpiece to be processed based on the reference cutting speed, a monitoring cycle is set, and the scattered laser intensity and the workpiece surface temperature at each moment are acquired in real time during each monitoring cycle, so as to obtain the degree of low processing quality and the probability of metal overheating.

[0048] In the embodiment of the present invention, the monitoring period is set to 30 seconds, and the monitoring frequency is set to 1 second.

[0049] Preferably, in one embodiment of the present invention, the method for obtaining a low-quality processing comprises:

[0050] The embodiment of the present invention takes into account that when the metal is in an abnormal cutting state, the abnormality of laser scattering will gradually become obvious. Therefore, for a monitoring cycle, the scattered laser intensity collected at the initial moment can be used as a reference to evaluate the change characteristics of the scattered laser intensity at subsequent moments. Therefore, the first scattered laser intensity collected in the monitoring cycle is used as the reference intensity, and the laser intensity difference between the scattered laser intensity at each moment in the monitoring cycle and the reference intensity is obtained.

[0051] Further considering that the standard deviation can characterize the volatility of the scattered laser intensity during the monitoring period, the greater the volatility, the worse the metal state and the lower the cutting quality. Therefore, the standard deviation of the scattered laser intensity during the monitoring period is obtained.

[0052] The degree of low processing quality is obtained according to the standard deviation and the laser intensity difference. In the embodiment of the present invention, except for the initial moment, there is a laser intensity difference with the reference intensity at each moment in the monitoring period, so the embodiment of the present invention uses the product of the average laser intensity difference and the standard deviation as the degree of low processing quality, that is, the larger the standard deviation, the greater the volatility of the scattered laser intensity, and the larger the average laser intensity difference, the greater the variability of the scattered laser intensity within the monitoring period, and the lower the processing quality, the greater the degree of low processing quality.

[0053] Preferably, in one embodiment of the present invention, the method for obtaining the metal overheating probability includes:

[0054] The average workpiece surface temperature during the monitoring period is obtained, that is, the larger the average workpiece surface temperature is, the more likely the metal thermal effect is to occur.

[0055] The surface temperature of the workpiece within the monitoring period constitutes a temperature sequence. The ratio of the latter element to the previous element in the temperature sequence is taken as the local growth rate. The average local growth rate in the temperature sequence is statistically calculated. The larger the average local growth rate is and the greater it is than 1, it indicates that the metal surface temperature tends to an overall growth trend within the monitoring period and has a stronger growth trend.

[0056] The metal overheating probability is obtained according to the average workpiece surface temperature and the average local growth rate. In the embodiment of the present invention, the product of the average workpiece surface temperature and the average local growth rate is used as the metal overheating probability.

[0057] Step S3: Determine the laser power adjustment direction according to the metal overheating probability, and obtain the power adjustment amount according to the processing low quality degree and the laser power range; adjust the laser power according to the laser power adjustment direction and the power adjustment amount after a monitoring cycle ends.

[0058] During the laser cutting process of metal workpieces, there are usually two factors that cause low cutting quality of metal workpieces, one is incomplete cutting and metal thermal effect. Because the reference cutting speed is set in the embodiment of the present invention, when incomplete cutting occurs, it is usually because the laser power is low, resulting in the laser heat not being sufficiently concentrated in the cutting area, or failing to be effectively transferred to the metal surface, resulting in incomplete cutting; when the metal produces a thermal effect, it means that the laser power at this time is too large, resulting in a large amount of energy generated in the cutting area, instantly heating the metal surface to the melting point or even higher temperature, resulting in poor metal state and poor cutting quality. Therefore, in order to achieve adaptive adjustment of laser power according to cutting quality, it is first necessary to determine the laser power adjustment direction, and the greater the probability of metal overheating, the greater the probability of metal thermal effect. Therefore, the embodiment of the present invention first determines the laser power adjustment direction based on the metal overheating probability, that is, the laser power adjustment direction has two directions: gain and loss.

[0059] After determining the laser power adjustment direction, it is necessary to determine the laser power adjustment amount. The greater the degree of low processing quality, the lower the quality, and the stronger the adjustment amount is needed. Therefore, based on the size of the laser power range, the power adjustment amount can be further combined with the degree of low processing quality. Then, combined with the laser power adjustment direction, the laser power of the monitoring cycle can be adaptively adjusted to ensure the cutting quality of the entire laser cutting process.

[0060] Preferably, in an embodiment of the present invention, the method for acquiring the laser power adjustment direction includes:

[0061] If the metal overheating probability is greater than the preset probability threshold, the laser power adjustment direction is set to de-gain adjustment; otherwise, the laser power adjustment direction is set to gain adjustment. In the embodiment of the present invention, after the metal overheating probability is normalized, the probability threshold is set to 0.3. De-gain adjustment is the laser power at this time minus the power adjustment amount, and gain adjustment is the laser power at this time plus the power adjustment amount.

[0062] The method for obtaining the power adjustment amount includes:

[0063] After normalizing the processing low quality degree, multiply it by the interval length of the laser power range to obtain the power adjustment amount. That is, the normalized processing low quality degree is used as the weight, and the interval length of the laser power range is used as the basic amount, and the power adjustment amount can be obtained by multiplying them.

[0064] It should be noted that the normalization method in the embodiment of the present invention may be implemented by a linear normalization method or other normalization methods, which are all technical means well known to those skilled in the art and will not be elaborated or limited herein.

[0065] In summary, the embodiment of the present invention counts the benchmark cutting speed and laser power range of the metal workpiece to be processed from the historical cutting data of the processed workpiece that has been processed. The degree of poor processing quality of the current workpiece can be effectively quantified based on the distribution volatility and degree of change of the scattered laser intensity. The probability of metal overheating is further obtained based on the surface temperature of the workpiece. Furthermore, the direction of laser power adjustment in the current state can be determined based on the probability of metal overheating, and the power adaptive adjustment of the laser cutting process can be achieved by combining the power adjustment amount obtained based on the degree of poor processing quality. The present invention ensures the cutting quality of the metal workpiece by real-time monitoring the quality state of the metal workpiece during the laser cutting process and adaptively adjusting the laser cutting parameters according to the quality state.

[0066] Based on the same inventive concept, the present invention also proposes a laser processing device for a metal workpiece, the device comprising:

[0067] The laser cutting initial setting module is used to collect historical cutting data of processed workpieces of the same type as the metal workpiece to be processed; and obtain the benchmark cutting speed and laser power range of the metal workpiece to be processed based on the historical cutting data;

[0068] The laser cutting information analysis module is used to perform laser processing on the metal workpiece to be processed based on the reference cutting speed; obtain the scattered laser intensity and the workpiece surface temperature at each moment during the processing in a preset monitoring cycle; obtain the degree of low processing quality based on the distribution volatility and variation of the heat dissipation laser intensity within the monitoring cycle; obtain the probability of metal overheating based on the size and increasing trend of the workpiece surface temperature;

[0069] The laser cutting parameter adjustment module is used to determine the laser power adjustment direction according to the probability of metal overheating, and obtain the power adjustment amount according to the processing quality and the laser power range; the laser power is adjusted according to the laser power adjustment direction and the power adjustment amount after a monitoring cycle ends.

[0070] The present invention also provides a laser processing device for a metal workpiece, wherein the device comprises the above-mentioned laser processing device for a metal workpiece.

[0071] The present invention also proposes a laser processing system for metal workpieces, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, any step of a laser processing method for a metal workpiece is implemented.

[0072] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0073] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A laser processing method for a metal workpiece, characterized in that: The method comprises: Collect historical cutting data of processed workpieces of the same type as the metal workpiece to be processed; and obtain a reference cutting speed and a laser power range of the metal workpiece to be processed according to the historical cutting data; Laser processing is performed on the metal workpiece to be processed based on the reference cutting speed; the scattered laser intensity and the workpiece surface temperature at each moment in the processing are obtained in a preset monitoring cycle; the degree of low processing quality is obtained according to the distribution volatility and variation degree of the scattered laser intensity in the monitoring cycle; the probability of metal overheating is obtained according to the size and increasing trend of the workpiece surface temperature; The laser power adjustment direction is determined according to the metal overheating probability, and the power adjustment amount is obtained according to the processing low quality degree and the laser power range; the laser power is adjusted after a monitoring cycle ends according to the laser power adjustment direction and the power adjustment amount.

2. The laser processing method for a metal workpiece according to claim 1, characterized in that: The method for obtaining the reference cutting speed includes: The usage frequency, corresponding cutting power quantity, and corresponding cutting power range of all cutting speed categories in historical cutting data are counted; the fit of each cutting speed category is obtained according to the usage frequency, cutting power quantity and cutting power range; and the cutting speed category with the greatest fit is selected as the benchmark cutting speed.

3. The laser processing method for a metal workpiece according to claim 2, characterized in that: The method for obtaining the laser power range includes: The maximum and minimum values ​​of the laser power corresponding to the reference cutting speed in the historical cutting data are counted to obtain the laser power range.

4. The laser processing method for a metal workpiece according to claim 1, characterized in that: The method for obtaining the low quality level of processing includes: The first scattered laser intensity collected in the monitoring cycle is used as the reference intensity; the standard deviation of the scattered laser intensity in the monitoring cycle is obtained; the laser intensity difference between the scattered laser intensity at each moment in the monitoring cycle and the reference intensity is obtained; and the degree of low processing quality is obtained based on the standard deviation and the laser intensity difference.

5. The laser processing method for a metal workpiece according to claim 1, characterized in that: The method for obtaining the metal overheating probability includes: The average workpiece surface temperature within the monitoring period is obtained; the workpiece surface temperature within the monitoring period constitutes a temperature sequence, the ratio of a latter element to a former element in the temperature sequence is used as the local growth rate, and the average local growth rate in the temperature sequence is counted; the metal overheating probability is obtained according to the average workpiece surface temperature and the average local growth rate.

6. The laser processing method for a metal workpiece according to claim 1, characterized in that: The method for obtaining the laser power adjustment direction includes: If the metal overheating probability is greater than a preset probability threshold, the laser power adjustment direction is set to a gain reduction adjustment; otherwise, the laser power adjustment direction is set to a gain adjustment.

7. The laser processing method for a metal workpiece according to claim 1, characterized in that: The method for obtaining the power adjustment amount includes: After the processing low quality degree is normalized, it is multiplied by the interval length of the laser power range to obtain the power adjustment amount.

8. A laser processing device for a metal workpiece, characterized in that: The device comprises: The laser cutting initial setting module is used to collect historical cutting data of processed workpieces of the same type as the metal workpiece to be processed; and obtain the benchmark cutting speed and laser power range of the metal workpiece to be processed according to the historical cutting data; The laser cutting information analysis module is used to perform laser processing on the metal workpiece to be processed based on the reference cutting speed; obtain the scattered laser intensity and the workpiece surface temperature at each moment during the processing in a preset monitoring cycle; obtain the degree of low processing quality according to the distribution volatility and variation degree of the heat dissipation laser intensity in the monitoring cycle; obtain the probability of metal overheating according to the size and increasing trend of the workpiece surface temperature; The laser cutting parameter adjustment module is used to determine the laser power adjustment direction according to the metal overheating probability, obtain the power adjustment amount according to the processing low quality degree and the laser power range; and adjust the laser power according to the laser power adjustment direction and the power adjustment amount after a monitoring cycle ends.

9. A laser processing device for metal workpieces, characterized in that: The equipment comprises a laser processing device for a metal workpiece as claimed in claim 8.

10. A laser processing system for a metal workpiece, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the laser processing method for a metal workpiece as claimed in any one of claims 1 to 7 are implemented.

Images