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

Abstract

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 metal workpieces. The method calculates 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 low 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 adjustment amount obtained in combination with the low processing quality can realize adaptive adjustment of the power of the laser cutting process. The present invention ensures the cutting quality of the metal workpiece by monitoring the quality status of the metal workpiece in the laser cutting process in real time and adaptively adjusting the laser cutting parameters according to the quality status.

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, offering advantages such as high speed, high precision, and non-contact operation. Prior to laser cutting, cutting parameters can be preset, enabling automated cutting of metal workpieces. However, during the actual cutting process, factors such as the workpiece material, surface condition, and sheet thickness can cause variations in the metal's response to the laser cutting process, leading to unstable cutting quality and resulting in rough edges, excessive heat-affected zones, and incomplete cutting. Lasers are unable to adaptively adjust their cutting parameters based on real-time cutting quality feedback, making quality issues difficult to resolve. Summary of the Invention

[0003] In order to solve the technical problem in the prior art of laser cutting that the cutting parameters cannot be adaptively adjusted according to the cutting conditions, the present invention aims 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 benchmark cutting speed and a laser power range of the metal workpiece to be processed based on the historical cutting data;

[0006] Laser processing is performed on the metal workpiece to be processed based on the reference cutting speed; scattered laser intensity and workpiece surface temperature are obtained at each moment during the processing in a preset monitoring period; the degree of poor processing quality is obtained based on the distribution fluctuation and degree of change of the scattered laser intensity within the monitoring period; and the probability of metal overheating is obtained based on the magnitude 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 low 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.

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

[0009] The usage frequency, corresponding cutting power quantity, and range of corresponding cutting power 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 range of cutting power; and the cutting speed category with the greatest fit is selected as the benchmark cutting speed.

[0010] Furthermore, the method for obtaining 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-quality processing includes:

[0013] The first scattered laser intensity collected in the monitoring period is used as the reference intensity; the standard deviation of the scattered laser intensity in the monitoring period is obtained; the laser intensity difference between the scattered laser intensity at each moment in the monitoring period 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 a local growth rate, and the average local growth rate in the temperature sequence is calculated; the metal overheating probability is obtained based on 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, the resultant 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 based on the historical cutting data;

[0022] a laser cutting information analysis module configured to laser process the metal workpiece to be processed based on the reference cutting speed; obtain the scattered laser intensity and workpiece surface temperature at each moment during the processing within a preset monitoring period; obtain the degree of poor processing quality based on the distribution fluctuation and degree of variation of the heat dissipation laser intensity within the monitoring period; and obtain the probability of metal overheating based on the magnitude 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 low processing quality 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.

[0024] The present invention also provides a laser processing device for a metal workpiece, which includes a laser processing apparatus for a metal workpiece.

[0025] The present invention also proposes a laser processing system for metal workpieces, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the system 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] To ensure basic cutting efficiency and quality, the present invention calculates the baseline cutting speed and laser power range for the metal workpiece to be processed from the historical cutting data of previously processed workpieces, ensuring efficient cutting of the metal workpiece. Furthermore, considering that the laser beam interacts with the material surface during the cutting process, the scattered light intensity can reflect changes in cutting quality. Therefore, the distribution fluctuation and degree of variation of the scattered laser intensity can effectively quantify the degree of poor machining quality of the current workpiece. Temperature information in the cutting area can intuitively represent the metal workpiece's response to the laser. Excessive temperatures can cause abnormal conditions such as thermal deformation. Therefore, the probability of metal overheating can be further determined based on the workpiece surface temperature. Furthermore, the metal overheating probability can be used to determine the laser power adjustment direction for the current state. Combined with the power adjustment amount obtained from the degree of poor machining quality, adaptive power adjustment can be achieved during the laser cutting process. The present invention ensures the cutting quality of the metal workpiece by real-time monitoring the quality status of the metal workpiece during the laser cutting process and adaptively adjusting the laser cutting parameters based on the quality status. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. 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 any 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] To further illustrate the technical means and effectiveness of the present invention in achieving its intended objectives, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the specific implementation, structure, features, and effectiveness of a laser processing method, apparatus, device, and system for metal workpieces according to the present invention. In the following description, references to "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[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 following describes in detail a specific scheme of a laser processing method, device, equipment and system for a metal workpiece provided by the present invention in conjunction with the accompanying drawings.

[0034] See also Figure 1 , which shows a flow chart of a laser processing method for a metal workpiece provided by one 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 based on the historical cutting data.

[0036] During the laser cutting process of metal workpieces, cutting speed and laser power are important parameters. These two parameters 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, and burrs; if the cutting speed is too slow, the laser power will be too concentrated, causing too much heat to accumulate in the cutting area, resulting in local overheating of the metal and thermal effects. If the laser power is too low, the energy of the laser beam is insufficient to melt the metal, resulting in poor cutting effect, low cutting efficiency and poor cutting surface quality; if the laser power is too high, the metal in the cutting area will overheat, resulting in problems such as pores, an excessively large molten pool, and metal spatter.

[0037] Therefore, embodiments of the present invention first require determining the baseline cutting speed and laser power range for the metal workpiece to be processed during the actual machining process. Embodiments of the present invention compile historical cutting data for previously processed workpieces of the same type as the metal workpiece to be processed. Because historical cutting data represents data from completed laser cutting, the most optimal baseline cutting speed and laser power range for the metal workpiece to be processed can be determined based on this historical cutting data. It should be noted that to further ensure the compatibility of these two parameters, the historical cutting data should be data with good cutting quality.

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

[0039] Statistics are compiled for all cutting speed categories in historical cutting data, including the frequency of use, the corresponding cutting power values, and the range of the corresponding cutting power values. For a cutting speed category, the greater its frequency of use in historical cutting data, the more suitable it is for the metal workpiece. A larger number of cutting power values indicates that the cutting speed category can accommodate a greater number of cutting powers and is more feasible in actual cutting. A larger range of cutting power values indicates that the current cutting speed category has a wider range of cutting powers, making it more suitable for the metal workpiece.

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

[0041] In an embodiment of the present invention, the frequency of use, the amount of cutting power, and the range of cutting power are normalized 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 used as the normalization result.

[0042] Furthermore, after determining the reference cutting speed, the laser power range can be determined by searching for the corresponding maximum and minimum cutting power in the historical cutting data.

[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 period; the degree of low processing quality is obtained based on the distribution volatility and degree of change of the scattered laser intensity within the monitoring period; the probability of metal overheating is obtained based on the size and increasing trend of the workpiece surface temperature.

[0044] In this embodiment of the present invention, fiber optic sensors and infrared sensors are installed on metal laser equipment to monitor the actual status of metal workpieces during laser cutting in real time. The fiber optic sensor collects the intensity of scattered light from the laser beam on the cutting area. The laser beam is transmitted to the cutting area via optical fiber, and the intensity of the scattered light is determined by the reflected or scattered signal transmitted back to the optical fiber. The infrared sensor collects thermal information about the metal workpiece to determine the surface temperature of the cutting area.

[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 thermal effects occur, the interaction between the metal and the laser becomes more complicated, and the metal surface state becomes more complex, 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 manifestations of laser scattered light under abnormal metal conditions 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 distribution volatility and degree of change of the collected scattered light intensity can be used to evaluate the cutting quality of the metal workpiece under the current cutting process and obtain the degree of low processing quality.

[0046] Furthermore, considering that laser overheating can cause a sharp rise in the surface temperature of a metal workpiece, resulting in thermal effects on the metal, affecting cutting quality and causing abnormal conditions such as thermal deformation, the probability of metal overheating can be determined by analyzing the surface temperature of the metal workpiece and assessing whether it has an increasing trend.

[0047] Therefore, in an embodiment of the present invention, during the laser processing of a metal workpiece to be processed based on a reference cutting speed, a monitoring cycle is set, and the scattered laser intensity and the workpiece surface temperature at each moment are obtained in real time during each monitoring cycle, thereby obtaining 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 low-quality processing includes:

[0050] The present invention takes into account that when metal is cut abnormally, laser scattering anomalies will gradually become apparent. Therefore, for a monitoring cycle, the scattered laser intensity collected at the initial moment can be used as a reference to evaluate the changing characteristics of the scattered laser intensity at subsequent moments. Therefore, the first scattered laser intensity collected during the monitoring cycle is used as the reference intensity, and the laser intensity difference between the scattered laser intensity and the reference intensity is calculated at each moment during the monitoring cycle.

[0051] Furthermore, considering that the standard deviation can represent the fluctuation of the scattered laser intensity during the monitoring period, the greater the fluctuation, the worse the metal condition 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 poor processing quality is determined based on the standard deviation and laser intensity difference. In this embodiment of the present invention, except for the initial moment, there is a laser intensity difference from the reference intensity at each moment in the monitoring cycle. Therefore, this embodiment uses the product of the average laser intensity difference and the standard deviation as the degree of poor processing quality. Specifically, a larger standard deviation indicates greater volatility in the scattered laser intensity, and a larger average laser intensity difference indicates greater variability in the scattered laser intensity within the monitoring cycle, thus lowering the processing quality and increasing the degree of poor 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 heating effect is to occur.

[0055] The surface temperature of the workpiece during 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 calculated. The larger the average local growth rate is and the greater it is than 1, the more the metal surface temperature tends to increase as a whole during the monitoring period, and the stronger the growth trend is.

[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 based on the metal overheating probability, and obtain the power adjustment amount based on the processing quality and the laser power range; adjust the laser power after a monitoring cycle based on the laser power adjustment direction and the power adjustment amount.

[0058] During the laser cutting process of metal workpieces, there are usually two factors that cause low cutting quality of the metal workpiece, one of which is incomplete cutting and metal thermal effect. Because the baseline cutting speed is set in the embodiment of the present invention, when incomplete cutting occurs, it is usually because the laser power is too 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 a higher temperature, resulting in poor metal condition 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 direction of laser power adjustment, 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 direction of laser power adjustment based on the probability of metal overheating, that is, the laser power adjustment direction has two directions: gain and loss.

[0059] After determining the laser power adjustment direction, the laser power adjustment amount needs to be determined. The greater the degree of poor processing quality, the lower the quality, and the greater the adjustment amount required. Therefore, the power adjustment amount can be determined based on the size of the laser power range and the degree of poor processing quality. Then, combined with the laser power adjustment direction, adaptive adjustment of the laser power during the monitoring cycle can be achieved to ensure cutting quality throughout the entire laser cutting process.

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

[0061] If the metal overheating probability exceeds a preset probability threshold, the laser power adjustment direction is set to degaussing; otherwise, the laser power adjustment direction is set to gaining. In this embodiment of the present invention, the metal overheating probability is normalized and the probability threshold is set to 0.3. Degaussing is the laser power at that time minus the power adjustment amount, while gain adjustment is the laser power at that time plus the power adjustment amount.

[0062] Methods for obtaining the power adjustment amount include:

[0063] After normalizing the processing quality reduction, multiply it by the interval length of the laser power range to obtain the power adjustment amount. The normalized processing quality reduction is used as the weight, and the interval length of the laser power range is used as the basis. The power adjustment amount is obtained by multiplying them.

[0064] It should be noted that the normalization method in the embodiment of the present invention can 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 here.

[0065] In summary, the embodiment of the present invention calculates 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 low 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 low processing quality. The present invention ensures the cutting quality of the metal workpiece by monitoring the quality status of the metal workpiece in real time during the laser cutting process and adaptively adjusting the laser cutting parameters according to the quality status.

[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 the same type of metal workpiece to be processed; based on the historical cutting data, the benchmark cutting speed and laser power range of the metal workpiece to be processed are obtained;

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

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

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

[0071] The present invention also proposes a laser processing system for metal workpieces, comprising 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 one of the steps of a laser processing method for a metal workpiece is implemented.

[0072] It should be noted that the order in which the embodiments of the present invention are described above is for illustrative purposes only and does not necessarily represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain 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 referred to each other. 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; obtain a benchmark cutting speed and a laser power range for the metal workpiece to be processed based on the historical cutting data; a method for obtaining the benchmark cutting speed includes: collecting statistics on the usage frequency of all cutting speed categories in the historical cutting data, the corresponding cutting power quantities, and the range of the corresponding cutting powers; obtaining the degree of fit of each cutting speed category based on the usage frequency, cutting power quantities, and the range of the cutting powers; and selecting the cutting speed category with the greatest degree of fit as the benchmark cutting speed; a method for obtaining the laser power range includes: collecting statistics on the maximum and minimum laser powers corresponding to the benchmark cutting speeds in the historical cutting data to obtain the laser power range; Laser processing is performed on a metal workpiece to be processed based on a 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 period; the degree of low processing quality is obtained based on the distribution volatility and degree of change of the scattered laser intensity within the monitoring period; the probability of metal overheating is obtained based on the size and increasing trend of the workpiece surface temperature; a method for obtaining the degree of low processing quality includes: taking the first scattered laser intensity collected in the monitoring period as the reference intensity; obtaining the standard deviation of the scattered laser intensity in the monitoring period; obtaining the laser intensity difference between the scattered laser intensity and the reference intensity at each moment in the monitoring period; obtaining the degree of low processing quality based on the standard deviation and the laser intensity difference; a method for obtaining the probability of metal overheating includes: obtaining the average workpiece surface temperature within the monitoring period; the workpiece surface temperature within the monitoring period constitutes a temperature sequence, the ratio of the latter element to the previous 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 based on the average workpiece surface temperature and the average local growth rate; 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 level 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; 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 adjustment; otherwise, the laser power adjustment direction is set to a gain adjustment; the method for obtaining the power adjustment amount includes: after normalizing the processing low quality level, multiplying it by the interval length of the laser power range to obtain the power adjustment amount.

2. A laser processing device for metal workpieces, characterized in that: The device is used to perform the laser processing method for a metal workpiece according to claim 1, and 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 based on the historical cutting data; a laser cutting information analysis module configured to laser process the metal workpiece to be processed based on the reference cutting speed; obtain the scattered laser intensity and workpiece surface temperature at each moment during the processing within a preset monitoring period; obtain the degree of poor processing quality based on the distribution fluctuation and degree of variation of the heat dissipation laser intensity within the monitoring period; and obtain the probability of metal overheating based on the magnitude 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 low processing quality 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.

3. A laser processing device for metal workpieces, characterized in that: The equipment includes the laser processing device for a metal workpiece according to claim 2.

4. 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 claim 1 are implemented.

Images