Laser cutting head nozzle blowing control method and system

Abstract

The invention provides a laser cutting head nozzle blowing control method and system. The method comprises the steps that first axis movement time of all axes of a machine tool movement track is obtained; based on the first-axis movement time of each axis, screening the first-axis movement time meeting a preset threshold value to obtain second-axis movement time; setting a blowing delay set value, and comparing the blowing delay set value with the second shaft movement time to obtain a time comparison result; and after the machine tool begins to move, according to the time comparison result, a gas electromagnetic one-way valve of the laser cutting head is controlled to be opened at the corresponding moment, and a nozzle begins to blow gas. According to the method, the cutting head nozzle is judged to be opened in advance before laser cutting, the pause time of the laser cutting process is shortened, and the laser machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of laser cutting technology, and in particular to a method and system for controlling air blowing of a laser cutting head nozzle. Background Art

[0002] When laser cutting is performed in the laser processing field, there will be molten metal or small metal particles after the molten metal is cooled in the cut seam. In order to protect the laser cutting head and the protective lens from being sputtered, it is necessary to set a nozzle on the laser cutting head to blow air so that the molten metal or the small metal particles after the molten metal is cooled are blown away. When the cutting head nozzle starts to blow air, a positive pressure state cannot be formed instantly at the nozzle. If cutting is not started until the gas conditions are met, the protective lens will be damaged;

[0003] At present, the existing technology requires that the cutting head nozzle be opened only after reaching the cutting position and the cutting can be performed only after the gas conditions are met. This will cause the laser cutting process to pause for a long time, thereby leading to the problem of low laser processing efficiency. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a laser cutting head nozzle blowing control method and system. The present invention reduces the pause time of the laser cutting process and improves the laser processing efficiency by judging in advance whether to open the cutting head nozzle before laser cutting.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides a laser cutting head nozzle blowing control method, which is applied to a laser cutting head, wherein the laser cutting head comprises: a nozzle and a gas electromagnetic one-way valve, wherein the nozzle is connected to the gas electromagnetic one-way valve, and comprises: obtaining the first-axis movement time of each axis of the machine tool motion trajectory; based on the first-axis movement time of each axis, screening the first-axis movement time that meets a preset threshold to obtain the second-axis movement time; setting a blowing delay setting value, and comparing the blowing delay setting value with the second-axis movement time to obtain a time comparison result; after the machine tool starts to move, according to the time comparison result, controlling the gas electromagnetic one-way valve of the laser cutting head to open at a corresponding time, so that the nozzle starts blowing.

[0006] An embodiment of the present invention proposes a method for controlling air blowing of a laser cutting head nozzle, which analyzes the motion trajectory of a machine tool to obtain the motion time of the machine tool, and screens the motion time of each axis of the machine tool to obtain the axis motion time that meets a preset threshold, thereby providing a reliable data basis for subsequent time comparison, and then sets an air blowing delay setting value for comparison with the axis motion time that meets the preset threshold. According to the difference between the axis motion time and the air blowing delay setting value, after the machine tool starts to move, according to different time comparison results, it is possible to judge in advance and control the gas electromagnetic one-way valve of the laser cutting head to open at the corresponding time, thereby reducing the pause time of the laser cutting process and improving the laser processing efficiency.

[0007] Furthermore, the target motion trajectory of the machine tool is obtained, and the target motion trajectory is split into several axis motion trajectories; based on the several axis motion trajectories and the current motion speed parameters of the several axes, the first axis motion time of each axis is obtained. The first axis motion time of each axis is compared one by one, and when the first axis motion time of each axis meets the preset threshold, the first axis motion time of the axis that meets the preset threshold is retained to obtain the second axis motion time; when the first axis motion time of each axis does not meet the preset threshold, the first axis motion time of the axis is eliminated.

[0008] Through the above scheme, the target motion trajectory of the machine tool movement is split into several axis motion trajectories, and the first axis motion time of each axis is obtained, and then the axis motion time that meets the preset threshold in each axis motion time is taken, so as to convert the distance parameters of the target motion trajectory into parameters on the time scale, so as to provide guarantee for the subsequent judgment and control of the gas electromagnetic one-way valve of the laser cutting head to open at the corresponding time, thereby improving the laser processing efficiency.

[0009] Furthermore, the gas electromagnetic one-way valve of the laser cutting head is opened, the pressure value at the nozzle is detected, the opening time of the gas electromagnetic one-way valve when the nozzle is under positive pressure is obtained, and the blowing delay setting value is obtained; the blowing delay setting value is compared with the second axis movement time to obtain a time comparison result.

[0010] Through the above scheme, by detecting the opening time of the gas electromagnetic one-way valve when the laser cutting head nozzle is under positive pressure, it is ensured that the blowing delay setting value can ensure that the laser cutting head nozzle is in a positive pressure state before the laser cutting starts. By comparing the blowing delay setting value with the maximum axis movement time of the machine tool, and based on the time comparison result, the opening time of the gas electromagnetic one-way valve is judged in advance, thereby improving the laser processing efficiency.

[0011] Furthermore, if the time comparison result is that the blowing delay setting value is less than or equal to the second axis movement time, the gas electromagnetic one-way valve of the laser cutting head is controlled to open when the laser cutting head starts to move, so that the nozzle starts to blow. If the time comparison result is that the blowing delay setting value is greater than the second axis movement time, the control proportional coefficient is calculated based on the blowing delay setting value and the second axis movement time; based on the control proportional coefficient, the control starting point on the target path is obtained; when the machine tool moves to the control starting point, the gas electromagnetic one-way valve of the laser cutting head is controlled to open when the laser cutting head moves to the control starting point, so that the nozzle starts to blow.

[0012] Through the above scheme, the opening time of the gas electromagnetic one-way valve can be judged in advance through the time comparison result, so that the gas electromagnetic one-way valve can be opened in advance when the machine tool moves, making the process before laser cutting smoother, reducing the waiting time after the laser cutting head reaches the target position, and thus improving the laser processing efficiency.

[0013] Furthermore, the present invention provides a method for controlling air blowing of a laser cutting head nozzle, further comprising: when the machine tool moves to the target position, if the opening time of the gas electromagnetic one-way valve is greater than the air blowing delay setting value, the laser cutting head is controlled to start processing. When the machine tool moves to the target position, if the opening time of the gas electromagnetic one-way valve is less than or equal to the air blowing delay setting value, the laser cutting head is controlled to execute a waiting process until the opening time of the gas electromagnetic one-way valve is greater than the air blowing delay setting value, and the laser cutting head is controlled to start processing.

[0014] Through the above scheme, when the machine tool moves to the target position, the relationship between the opening time of the gas electromagnetic one-way valve and the blowing delay setting value is judged again to ensure that the cutting head nozzle is in a positive pressure state before laser cutting. By judging and controlling the opening of the gas electromagnetic one-way valve in advance, the overall smoothness of the machine tool movement is guaranteed, the pauses in the processing process are reduced, and the laser processing efficiency is improved.

[0015] An embodiment of the present invention also provides a laser cutting head nozzle blowing control system, comprising: a first time acquisition module, a second time acquisition module, a time comparison module and a nozzle blowing control module; the first time acquisition module is used to acquire the first axis movement time of each axis of the machine tool motion trajectory; the second time acquisition module is used to screen the first axis movement time that meets a preset threshold based on the first axis movement time of each axis to obtain the second axis movement time; the time comparison module is used to set a blowing delay setting value, and compare the blowing delay setting value with the second axis movement time to obtain a time comparison result; the nozzle blowing control module is used to control the gas electromagnetic one-way valve of the laser cutting head to open at a corresponding time after the machine tool starts to move according to the time comparison result, so that the nozzle starts blowing.

[0016] Furthermore, the nozzle blowing control module is used to control the gas electromagnetic one-way valve of the laser cutting head to open at a corresponding time according to the time comparison result, so that the nozzle starts blowing, including: a first control unit and a second control unit; the first control unit is used to control the gas electromagnetic one-way valve of the laser cutting head to open when the laser cutting head starts to move if the time comparison result is that the blowing delay setting value is less than or equal to the second axis movement time, so that the nozzle starts blowing; the second control unit is used to calculate the control proportional coefficient based on the blowing delay setting value and the second axis movement time if the time comparison result is that the blowing delay setting value is greater than the second axis movement time; based on the control proportional coefficient, obtain the control starting point on the target path; when the machine tool moves to the control starting point, control the gas electromagnetic one-way valve of the laser cutting head to open when the laser cutting head starts to move, so that the nozzle starts blowing.

[0017] An embodiment of the present invention proposes a laser cutting head nozzle blowing control system, which analyzes the machine tool motion trajectory through a first time acquisition module to obtain the machine tool motion time, and screens the motion time of each axis of the machine tool through a second time acquisition module to obtain the axis motion time that meets a preset threshold, thereby providing a reliable data basis for subsequent time comparison, and then sets an air blowing delay setting value through a time comparison module for comparison with the axis motion time that meets the preset threshold. The nozzle air blowing control module can be used to judge and control the gas electromagnetic one-way valve of the laser cutting head to open at a corresponding time according to the difference between the axis motion time and the air blowing delay setting value after the machine tool starts to move, based on different time comparison results, thereby reducing the pause time of the laser cutting process and improving the laser processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a process flow of a laser cutting head nozzle blowing control method provided in an embodiment of the present invention Figure 1 ;

[0019] Figure 2 A schematic diagram of a process flow of a laser cutting head nozzle blowing control method provided in an embodiment of the present invention Figure 2 ;

[0020] Figure 3 A schematic diagram of the module structure of a laser cutting head nozzle blowing control system provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1

[0023] See also Figure 1 , Figure 1 A schematic diagram of a process flow of a laser cutting head nozzle blowing control method provided in an embodiment of the present invention Figure 1 ;like Figure 1 As shown, the embodiment of the present invention provides a method for controlling air blowing of a laser cutting head nozzle, including steps 101 to 104, each of which is specifically as follows:

[0024] Step 101, obtaining the first axis motion time of each axis of the machine tool motion trajectory;

[0025] As an example of this embodiment, a target motion trajectory of a machine tool is obtained, and the target motion trajectory is split into several axis motion trajectories; based on the several axis motion trajectories and the current motion speed parameters of the several axes, the first axis motion time of each axis is obtained.

[0026] In order to make the subsequent judgment and control of the opening of the gas electromagnetic one-way valve of the laser cutting head more accurate, the distance parameters of the target motion trajectory are converted into parameters on the time scale, the scale of the data parameters is unified, and a reliable data basis is provided to improve the laser processing efficiency. A specific implementation method is to take the xyz coordinate system as an example, split the target trajectory of the machine tool movement into trajectories in the x-axis, y-axis and z-axis directions, obtain the starting point and target position point corresponding to the machine tool on each axis, obtain the motion trajectory of each axis, read the current machine tool motion speed parameters, and calculate the time for each axis to move from the starting point to the target position point. The calculation formula is as follows:

[0027]

[0028] Where, t i represents the axis movement time of the x-axis; t j Represents the axis movement time of the y-axis; t k represents the axis movement time of the z axis; x i represents the motion trajectory of the x-axis, where i = 1, 2, 3, ..., i; y j represents the motion trajectory of the y-axis, where j = 1, 2, 3, ..., j; z k represents the motion trajectory of the z-axis, where k = 1, 2, 3, ..., k; v0 represents the motion speed parameter of the machine tool at the current moment;

[0029] Step 102, based on the first axis movement time of each axis, screening the first axis movement time that meets a preset threshold to obtain the second axis movement time;

[0030] As an example of this embodiment, the first-axis movement time of each axis is compared one by one. When the first-axis movement time of each axis meets the preset threshold, the first-axis movement time of the axis that meets the preset threshold is retained to obtain the second-axis movement time; when the first-axis movement time of each axis does not meet the preset threshold, the first-axis movement time of the axis is eliminated.

[0031] After obtaining the weekly motion time of several axes, in order to ensure that the subsequent cutting head nozzle can be in a positive pressure state, the axis motion time of several axes needs to be screened. By screening out the axis motion time that meets the preset threshold, it is possible to ensure that the subsequent advance judgment and the gas electromagnetic one-way valve of the laser cutting head are opened at the corresponding time to provide data support to improve the laser processing efficiency. A specific implementation method is to compare the axis motion time of all axes one by one, and integrate the axis motion time of all axes that meet the preset threshold (such as 10s) into the second axis motion time. The axis motion time that does not meet the preset threshold will be eliminated. In this embodiment, the maximum value of all axis motion times is preferentially selected as the second axis motion time t max , in order to better provide guarantee for subsequent advance judgment and opening of the gas electromagnetic one-way valve of the laser cutting head at the corresponding time.

[0032] Step 103, setting a blowing delay setting value, and comparing the blowing delay setting value with the second axis movement time to obtain a time comparison result;

[0033] As an example of this embodiment, open the gas electromagnetic one-way valve of the laser cutting head, detect the pressure value at the nozzle, obtain the opening time of the gas electromagnetic one-way valve when the nozzle is under positive pressure, and obtain the blowing delay setting value; compare the blowing delay setting value with the second axis movement time to obtain a time comparison result.

[0034] In order to ensure that there is a positive pressure at the cutting head nozzle before starting laser cutting, it is necessary to perform a time comparison after obtaining the second axis movement time, so as to subsequently determine whether the length of time the cutting head nozzle is open can meet the requirement of the cutting head nozzle reaching a positive pressure, so as to improve the laser processing efficiency. A specific implementation method is to stop the machine tool from moving, open the gas electromagnetic one-way valve of the laser cutting head, detect the pressure at the cutting head nozzle in real time, record the time required for the cutting head nozzle to reach a positive pressure, and use this time as the blowing delay setting value T; another explanation of this embodiment is that according to the historical operation process, a historical blowing delay setting value with the same operating condition as the current operating condition can be selected as the blowing delay setting value T of the current condition. After setting the blowing delay setting value T, it is compared with the second axis movement time t max Compare and get the time comparison results, which include: the second axis movement time t max Less than or equal to the blowing delay setting value T and the second axis movement time t max Greater than the blowing delay setting value T.

[0035] Step 104, after the machine tool starts to move, according to the time comparison result, the gas electromagnetic one-way valve of the laser cutting head is controlled to open at a corresponding time, so that the nozzle starts to blow air.

[0036] As an example of this embodiment, if the time comparison result is that the blowing delay setting value is less than or equal to the second axis movement time, the gas electromagnetic one-way valve that controls the laser cutting head is opened when the laser cutting head starts to move, so that the nozzle starts to blow; if the time comparison result is that the blowing delay setting value is greater than the second axis movement time, then based on the blowing delay setting value and the second axis movement time, the control proportional coefficient is calculated; based on the control proportional coefficient, the control starting point on the target path is obtained; when the machine tool moves to the control starting point, the gas electromagnetic one-way valve that controls the laser cutting head is opened when the laser cutting head moves to the control starting point, so that the nozzle starts to blow.

[0037] The opening time of the gas electromagnetic one-way valve is judged in advance through the time comparison result, so that the gas electromagnetic one-way valve can be opened in advance when the machine tool moves, so that the process before laser cutting is smoother, and the waiting time after the laser cutting head reaches the target position is reduced, thereby improving the laser processing efficiency. A specific implementation method is that when the time comparison result is that the blowing delay setting value T is less than or equal to the second axis movement time t max When t max When the time comparison result is that the blowing delay setting value T is greater than the second axis movement time t max When t maxWhen it is greater than T, the control proportional coefficient C is calculated. The specific formula is as follows:

[0038]

[0039] Assume that the axis motion time in the x-axis direction is the largest, and take the second axis motion time t as max , and the time comparison result is that the blowing delay setting value T is greater than the second axis movement time t max , then in the trajectory x1 from the starting point to the end point of the machine tool, when the machine tool moves to the control starting point x ′ 1, open the gas electromagnetic one-way valve to control the starting point x ′ The calculation formula of 1 is as follows:

[0040] x ′ 1=C*x1

[0041] As another example of an embodiment of the present invention, when the machine tool moves to the target position, the relationship between the opening time of the gas electromagnetic one-way valve and the blowing delay setting value is judged again to ensure that the cutting head nozzle is in a positive pressure state before laser cutting. By judging and controlling the opening of the gas electromagnetic one-way valve in advance, the overall smoothness of the machine tool movement is guaranteed, the pauses during the processing are reduced, and the laser processing efficiency is improved. For a specific possible implementation method, see Figure 2 , Figure 2 A schematic diagram of a process flow of a laser cutting head nozzle blowing control method provided in an embodiment of the present invention Figure 2; When the machine tool moves to the target position, if the opening time of the gas electromagnetic one-way valve is greater than the blowing delay setting value, the laser cutting head is controlled to start processing; when the machine tool moves to the target position, if the opening time of the gas electromagnetic one-way valve is less than or equal to the blowing delay setting value, the laser cutting head is controlled to execute the waiting process until the opening time of the gas electromagnetic one-way valve is greater than the blowing delay setting value, and the laser cutting head is controlled to start processing; a specific explanation is that before the machine tool starts to move, first obtain the time comparison result through steps 101 to 103, the machine tool starts to move, and controls the gas electromagnetic one-way valve to open according to the time comparison result, so as to realize the execution of the blowing action in advance during the movement of the machine tool. When the machine tool moves to the target position, the opening time of the gas electromagnetic one-way valve and the blowing delay setting value are judged. If the opening time of the gas electromagnetic one-way valve is greater than the blowing delay setting value, the laser cutting head is controlled to start processing. The delay setting value indicates that the blowing action is performed in advance during the movement of the machine tool, and a positive pressure has been formed at the cutting head nozzle, and the laser cutting process can be started directly; if the opening time of the gas electromagnetic one-way valve is less than or equal to the blowing delay setting value, it means that the blowing action is performed in advance during the movement of the machine tool, which cannot completely form a positive pressure at the cutting head nozzle. It is necessary to wait until the opening time of the gas electromagnetic one-way valve is greater than the blowing delay setting value before it can be said that a positive pressure is formed at the cutting head nozzle and the laser cutting process can be started. While performing the blowing action in advance during the movement of the machine tool, it is also necessary to ensure that the opening time of the gas electromagnetic one-way valve is greater than the time for the positive pressure to be formed at the cutting head nozzle, so as to avoid starting the processing before a positive pressure is formed at the cutting head nozzle and damaging the protective lens. The embodiment of the present invention greatly shortens the waiting time of the prior art in which the gas electromagnetic one-way valve is opened after reaching the target position, thereby improving the laser processing efficiency.

[0042] An embodiment of the present invention proposes a method for controlling air blowing of a laser cutting head nozzle, which analyzes the motion trajectory of a machine tool to obtain the motion time of the machine tool, and screens the motion time of each axis of the machine tool to obtain the axis motion time that meets a preset threshold, thereby providing a reliable data basis for subsequent time comparison, and then sets an air blowing delay setting value for comparison with the axis motion time that meets the preset threshold. According to the difference between the axis motion time and the air blowing delay setting value, after the machine tool starts to move, according to different time comparison results, it is possible to judge in advance and control the gas electromagnetic one-way valve of the laser cutting head to open at the corresponding time, thereby reducing the pause time of the laser cutting process and improving the laser processing efficiency.

[0043] Example 2

[0044] See also Figure 3 , Figure 3 A schematic diagram of the module structure of a laser cutting head nozzle blowing control system provided by an embodiment of the present invention. Figure 3As shown, an embodiment of the present invention proposes a laser cutting head nozzle blowing control system, including: a first time acquisition module 301, a second time acquisition module 302, a time comparison module 303 and a nozzle blowing control module 304; the first time acquisition module 301 is used to obtain the first axis movement time of each axis of the machine tool motion trajectory; the second time acquisition module 302 is used to screen the first axis movement time that meets a preset threshold based on the first axis movement time of each axis to obtain the second axis movement time; the time comparison module 303 is used to set a blowing delay setting value, and compare the blowing delay setting value with the second axis movement time to obtain a time comparison result; the nozzle blowing control module 304 is used to control the gas electromagnetic one-way valve of the laser cutting head to open at a corresponding time after the machine tool starts to move according to the time comparison result, so that the nozzle starts blowing.

[0045] As an example of an embodiment of the present invention, the nozzle blowing control module 304 is used to control the gas electromagnetic one-way valve of the laser cutting head to open at the corresponding time according to the time comparison result, so that the nozzle starts blowing, including: a first control unit 401 and a second control unit 402; the first control unit 401 is used to control the gas electromagnetic one-way valve of the laser cutting head to open when the laser cutting head starts to move if the time comparison result is that the blowing delay setting value is less than or equal to the second axis movement time, so that the nozzle starts blowing; the second control unit 402 is used to calculate the control proportional coefficient based on the blowing delay setting value and the second axis movement time if the time comparison result is that the blowing delay setting value is greater than the second axis movement time; based on the control proportional coefficient, obtain the control starting point on the target path; when the machine tool moves to the control starting point, control the gas electromagnetic one-way valve of the laser cutting head to open when the laser cutting head starts to move, so that the nozzle starts blowing.

[0046] An embodiment of the present invention proposes a laser cutting head nozzle blowing control system, which analyzes the machine tool motion trajectory through a first time acquisition module to obtain the machine tool motion time, and screens the motion time of each axis of the machine tool through a second time acquisition module to obtain the axis motion time that meets a preset threshold, thereby providing a reliable data basis for subsequent time comparison, and then sets an air blowing delay setting value through a time comparison module for comparison with the axis motion time that meets the preset threshold. The nozzle air blowing control module can be used to judge and control the gas electromagnetic one-way valve of the laser cutting head to open at a corresponding time according to the difference between the axis motion time and the air blowing delay setting value after the machine tool starts to move, based on different time comparison results, thereby reducing the pause time of the laser cutting process and improving the laser processing efficiency.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

Claims

1. A method for controlling air blowing of a laser cutting head nozzle, applied to a laser cutting head, the laser cutting head comprising: The nozzle and the gas electromagnetic one-way valve are connected to the gas electromagnetic one-way valve, and the laser cutting head nozzle blowing control method includes: Get the first axis motion time of each axis of the machine tool motion trajectory; Based on the first axis movement time of each axis, the first axis movement time that meets a preset threshold is screened to obtain the second axis movement time; Setting a blowing delay setting value, and comparing the blowing delay setting value with the second axis movement time to obtain a time comparison result; After the machine tool starts to move, the gas electromagnetic one-way valve of the laser cutting head is controlled to open at a corresponding time according to the time comparison result, so that the nozzle starts to blow air.

2. A method for controlling air blowing of a laser cutting head nozzle according to claim 1, characterized in that: The obtaining of the first axis motion time of each axis of the machine tool motion trajectory comprises: Obtaining a target motion trajectory of the machine tool, and splitting the target motion trajectory into a plurality of axis motion trajectories; Based on the motion trajectories of the plurality of axes and current motion speed parameters of the plurality of axes, a first axis motion time of each axis is acquired.

3. A method for controlling air blowing of a laser cutting head nozzle according to claim 1, characterized in that: Based on the first axis motion time of each axis, screening the first axis motion time that meets a preset threshold to obtain the second axis motion time includes: Comparing the first axis motion time of each axis one by one, when the first axis motion time of each axis meets a preset threshold, retaining the first axis motion time of the axis meeting the preset threshold, and obtaining the second axis motion time; When the first axis motion time of each axis does not meet a preset threshold, the first axis motion time of the axis is eliminated.

4. A method for controlling air blowing of a laser cutting head nozzle according to claim 1, characterized in that: The setting of the blowing delay setting value, and comparing the blowing delay setting value with the second axis movement time to obtain a time comparison result, include: Open the gas electromagnetic one-way valve of the laser cutting head, detect the pressure value at the nozzle, obtain the opening time of the gas electromagnetic one-way valve when the nozzle is under positive pressure, and obtain the blowing delay setting value; The blowing delay setting value and the second axis movement time are compared to obtain a time comparison result.

5. A method for controlling air blowing of a laser cutting head nozzle as claimed in claim 4, characterized in that: After the machine tool starts to move, according to the time comparison result, the gas electromagnetic one-way valve of the laser cutting head is controlled to open at a corresponding time, so that the nozzle starts to blow air, including: If the time comparison result is that the blowing delay setting value is less than or equal to the second axis movement time, the gas electromagnetic one-way valve of the laser cutting head is controlled to open when the laser cutting head starts to move, so that the nozzle starts blowing.

6. A method for controlling air blowing of a laser cutting head nozzle as claimed in claim 4, characterized in that: After the machine tool starts to move, according to the time comparison result, the gas electromagnetic one-way valve of the laser cutting head is controlled to open at a corresponding time, so that the nozzle starts to blow air, including: If the time comparison result is that the blowing delay setting value is greater than the second axis movement time, then calculating a control proportional coefficient based on the blowing delay setting value and the second axis movement time; Based on the control proportional coefficient, obtaining a control starting point on the target path; When the machine tool moves to the control starting point, the gas electromagnetic one-way valve that controls the laser cutting head is opened when the laser cutting head moves to the control starting point, so that the nozzle starts to blow air.

7. A method for controlling air blowing of a laser cutting head nozzle according to claim 1, characterized in that: Also includes: When the machine tool moves to the target position, if the opening time of the gas electromagnetic one-way valve is greater than the blowing delay setting value, the laser cutting head is controlled to start processing.

8. A method for controlling air blowing of a laser cutting head nozzle according to claim 7, characterized in that: Also includes: When the machine tool moves to the target position, if the opening time of the gas electromagnetic one-way valve is less than or equal to the blowing delay setting value, the laser cutting head is controlled to execute the waiting process until the opening time of the gas electromagnetic one-way valve is greater than the blowing delay setting value, and the laser cutting head is controlled to start processing.

9. A laser cutting head nozzle blowing control system, characterized in that: include: A first time acquisition module, a second time acquisition module, a time comparison module and a nozzle blowing control module; The first time acquisition module is used to acquire the first axis motion time of each axis of the machine tool motion trajectory; The second time acquisition module is used to filter the first axis movement time that meets a preset threshold based on the first axis movement time of each axis to obtain the second axis movement time; The time comparison module is used to set a blowing delay setting value, and compare the blowing delay setting value with the second axis movement time to obtain a time comparison result; The nozzle blowing control module is used to control the gas electromagnetic one-way valve of the laser cutting head to open at a corresponding time according to the time comparison result after the machine tool starts to move, so that the nozzle starts blowing.

10. A laser cutting head nozzle air blowing control system as claimed in claim 9, characterized in that: The nozzle blowing control module is used to control the gas electromagnetic one-way valve of the laser cutting head to open at a corresponding time according to the time comparison result, so that the nozzle starts blowing, including: a first control unit and a second control unit; The first control unit is used to control the gas electromagnetic one-way valve of the laser cutting head to open when the laser cutting head starts to move, so that the nozzle starts to blow air if the time comparison result shows that the blowing delay setting value is less than or equal to the second axis movement time; The second control unit is used to calculate a control proportional coefficient based on the air blowing delay setting value and the second axis movement time if the time comparison result is that the air blowing delay setting value is greater than the second axis movement time; based on the control proportional coefficient, obtain a control starting point on the target path; when the machine tool moves to the control starting point, control the gas electromagnetic one-way valve of the laser cutting head to open when the laser cutting head starts to move, so that the nozzle starts blowing.

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