Laser cutting method and system

Abstract

The application provides a laser cutting method and system suitable for a laser processing device of a rotary table type, and the laser cutting method comprises the following steps: obtaining a safety area based on a feeding support of the laser processing device; determining whether a cutting track has a safety starting point in the safety area; and adjusting a starting point of the cutting track to the safety starting point if the cutting track has the safety starting point. The laser cutting method can improve the processing safety of the laser processing device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine tool control, and in particular to a laser cutting method and system. BACKGROUND

[0002] Laser processing refers to a method of processing materials using a converged laser beam. A laser processing device generally includes a laser, a processing machine table, an optical fiber, and a laser cutting head.

[0003] Existing laser processing devices include chuck machine types and rotary table machine types. In the chuck machine type, the laser cutting head remains stationary, and the chuck clamps the material (such as a pipe) to rotate and pull to perform cutting. Due to the mechanical movement of the chuck rotation and the swinging of the pipe, the precision is poor. In the rotary table machine type, the laser processing device is a rotary table that moves with the laser head through the optical fiber, and the material only performs feeding movement on the feeding support without rotation. Therefore, the processing precision can be significantly improved.

[0004] However, in the laser processing device of the rotary table machine type, the laser cutting head has a wider range of motion. Therefore, when the starting point position of the cutting trajectory planned on the drawing is unreasonable, the laser cutting head may be damaged due to the falling of the part, thereby reducing the processing safety of the laser processing device of the rotary table machine type. SUMMARY

[0005] The present application provides a laser cutting method to improve the processing safety of the laser processing device of the rotary table machine type.

[0006] In a first aspect, the present application provides a laser cutting method suitable for a laser processing device of a rotary table machine type, the laser cutting method comprising:

[0007] acquiring a safety zone based on a feeding support of the laser processing device;

[0008] determining whether a cutting trajectory has a safe starting point in the safety zone;

[0009] if the cutting trajectory has the safe starting point, adjusting the starting point of the cutting trajectory to the safe starting point.

[0010] Optionally, the method of acquiring the safety zone based on the feeding support of the laser processing device comprises acquiring the safety zone based on a support angle of the feeding support, and the safety zone is within the range of the support angle.

[0011] Optionally, the method further comprises: if the cutting trajectory does not have the safe starting point and does not have a micro-connection segment on the cutting trajectory, adding a micro-connection segment on the cutting trajectory.

[0012] Optionally, the method further comprises: if the cutting trajectory does not have the safe start point, making a prompt of not being in the safe area.

[0013] Optionally, the method of determining whether the cutting trajectory has the safe start point comprises: if all the cutting trajectories are outside the safe area, the cutting trajectory does not have the safe start point.

[0014] Optionally, the method of determining whether the cutting trajectory has the safe start point further comprises: if the cutting trajectory is at least partially in the safe area, obtaining a plurality of alternative start points on the cutting trajectory according to pre-planning rules; if all the alternative start points are outside the safe area, the cutting trajectory does not have the safe start point; if any of the alternative start points is in the safe area, the cutting trajectory has the safe start point.

[0015] Optionally, the method of determining whether the cutting trajectory has the safe start point comprises: obtaining a plurality of alternative start points on the cutting trajectory according to pre-planning rules; if all the alternative start points are outside the safe area, the cutting trajectory does not have the safe start point; if any of the alternative start points is in the safe area, the cutting trajectory has the safe start point.

[0016] Optionally, the method of obtaining a plurality of alternative start points on the cutting trajectory according to pre-planning rules comprises: obtaining a plurality of the alternative start points according to pre-planning start point conditions; the pre-planning start point conditions comprise at least one of the following types: a midpoint of a long side in the cutting trajectory that is longer than a preset length; a midpoint of a line segment in a boundary of a bounding box corresponding to the cutting trajectory after two-dimensional expansion of the cutting trajectory; a plurality of preset sampling points on a distal boundary of the cutting trajectory; a midpoint of a specified long side of the cutting trajectory outside the cutting line, the specified long side being a line segment formed by all line segments connected head to tail on the same line after two-dimensional expansion of the cutting trajectory; an endpoint of a micro-connection segment in the cutting trajectory.

[0017] Optionally, the method of obtaining a plurality of alternative start points on the cutting trajectory according to pre-planning rules further comprises: sorting a plurality of the alternative start points according to a preset sorting rule to form an alternative start point list.

[0018] Optionally, the preset sorting rule comprises: sorting each of the alternative start points based on a Z-axis coordinate of each of the alternative start points, the alternative start point with a larger Z-axis coordinate being prioritized over the alternative start point with a smaller Z-axis coordinate, the Z-axis being a coordinate axis parallel to a feeding direction, the Z-axis coordinate decreasing in the feeding direction; when the Z-axis coordinates of a plurality of the alternative start points are the same, sorting based on a preset type priority.

[0019] Optionally, the preset category priority is in turn: an endpoint of a micro-segment in the cutting track, a midpoint of a specified long side of the cutting track other than the cutting line, a long side midpoint of the cutting track above a preset length, a line segment midpoint in a bounding box boundary corresponding to the cutting track after two-dimensional expansion of the cutting track, and a plurality of preset sampling points on a distal boundary of the cutting track.

[0020] Optionally, when any of the alternative starting points is in the safety zone, the laser cutting method with the safety starting point further includes: sequentially judging whether the alternative starting points in the list of alternative starting points are in the safety zone until the first alternative starting point in the safety zone appears; and taking the first alternative starting point in the safety zone as the safety starting point.

[0021] In a second aspect, the present application provides a laser cutting system suitable for a rotary table type laser processing device, which adopts the laser cutting method according to any one of the above.

[0022] In a third aspect, the present application provides an electronic device, which includes a memory, a processor, and a program stored in the memory and executable on the processor, and the processor implements the steps of the method according to any one of the above when executing the program.

[0023] In a fourth aspect, the present application provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps of the method according to any one of the above when executed by a processor.

[0024] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0025] In the laser cutting method and system provided by the present application, the safety zone is obtained based on the support angle of the feeding support, so that the lower region of the material to be cut is excluded from the safety zone, and when the cutting track has a safety starting point in the safety zone, the starting point of the cutting track is adjusted to the safety starting point, thereby reducing the risk of the laser cutting head being damaged by falling parts during laser cutting processing, and improving the processing safety of the rotary table type laser processing device. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0027] Figure 1is a flowchart of a laser cutting method according to an embodiment of the present application;

[0028] Figure 2 is a cross-sectional view of a feeding support, a support angle and a safety zone in a projection plane according to an embodiment of the present application;

[0029] Figure 3 is a cross-sectional view of a feeding support, a support angle and a safety zone in a projection plane according to another embodiment of the present application;

[0030] Figure 4 and Figure 6 is a flowchart of determining whether a cutting trajectory has a safe start point within a safety zone according to an embodiment of the present application;

[0031] Figure 5 is a flowchart of determining whether a cutting trajectory has a safe start point within a safety zone according to yet another embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without any creative effort fall within the scope of protection of the present application.

[0033] The terms "first", "second", "third", "fourth" and the like (if any) in the description, claims, and drawings of the present application are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged, where appropriate, so that the embodiments of the present application described herein can be carried out in other sequences than those illustrated or described herein. Moreover, the terms "comprising" and "including" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or apparatus that comprises a list of steps or units is not necessarily limited to those steps or units that are clearly listed, but can include other steps or units that are not clearly listed or inherent to such processes, methods, products or apparatus.

[0034] The technical solutions of the present application will be described in detail below with reference to specific embodiments. The following specific embodiments can be combined with each other, and some embodiments may not be described again for the same or similar concepts or processes.

[0035] The embodiments of the present application provide a laser cutting method, which is suitable for a rotary table type laser processing equipment.

[0036] Reference is made to Figure 1A laser cutting method, comprising:

[0037] In step S100, a safety zone is obtained based on a feeding support of the laser processing equipment;

[0038] In step S200, it is determined whether the cutting track has a safe starting point within the safety zone;

[0039] In step S300, if the cutting track does not have a safe starting point and does not have a micro-continuous segment on the cutting track, a micro-continuous segment is added on the cutting track;

[0040] In step S400, if the cutting track has a safe starting point, the starting point of the cutting track is adjusted to the safe starting point;

[0041] In the embodiment of the present application, not only is the safety zone obtained based on the support angle of the feeding support to exclude the area below the material to be cut from the safety zone, but also when the cutting track has a safe starting point within the safety zone, the starting point of the cutting track is adjusted to the safe starting point, thereby reducing the risk of the laser cutting head being damaged by falling parts during laser cutting processing, thereby improving the processing safety of the rotary disc type laser processing equipment.

[0042] Further, since a micro-continuous segment is added on the cutting track when it is determined that the cutting track does not have a safe starting point within the safety zone and does not have a micro-continuous segment on the cutting track, the risk of the cutting track not having a safe starting point and not having a micro-continuous segment is high, and the micro-continuous segment is added to prevent the finished parts from falling, thereby greatly reducing the risk of the laser cutting head being damaged by falling parts during laser cutting processing, thereby further improving the processing safety of the rotary disc type laser processing equipment.

[0043] For the convenience of explanation and description, in the embodiment of the present application, a coordinate system is defined.

[0044] Specifically, the Z-axis is defined as a coordinate axis parallel to the feeding direction, the plane perpendicular to the Z-axis is a projection plane, and the projection plane contains the right-angle coordinate system composed of the X-axis and the Y-axis, wherein the X-axis direction is the horizontal direction and the Y-axis direction is the vertical direction (as shown in Figure 2 The Z-axis coordinate decreases in the feeding direction.

[0045] It should be understood that in actual application scenarios, the coordinate system can be defined according to actual needs, and the definition of the coordinate system does not affect the technical effects of the present application.

[0046] The following will be described in detail with reference to the accompanying drawings.

[0047] Please refer to Figure 2 A safety zone A is obtained based on a feeding support 10 of the laser processing equipment.

[0048] In the embodiment, for step S100, the method for obtaining the safety zone A based on the feeding support 10 of the laser processing device comprises: obtaining the safety zone A based on the support angle C of the feeding support 10, the safety zone A being within the range of the support angle C.

[0049] Specifically, on the projection plane, the region where the feeding support 10 supports the material 20 corresponds to have the support angle C.

[0050] It should be noted that in actual application scenarios, due to the different structures of various laser cutting machines, each laser cutting machine corresponds to have a respective support angle C.

[0051] In addition, the support angle C not only contains angle information, but also contains position information based on the feeding support 10. Therefore, in actual application scenarios, in order to accurately express the support angle C, the range corresponding to the support angle C can be converted into a corresponding coordinate range based on the above Cartesian coordinate system, and the range of the safety zone A is determined accordingly.

[0052] It should be understood that since the safety zone A is obtained based on the support angle C, the safety zone A can also convert the corresponding range into a corresponding coordinate range, similar to the support angle C.

[0053] In the embodiment, the safety zone A and the support angle C have the same range. For ease of explanation, Figure 2 the range boundary of the safety zone A is schematically represented by a dashed line.

[0054] In another embodiment, the range of the safety zone B is smaller than the range of the support angle C (as shown in Figure 3 ). Thus, the safety of the obtained safety zone is higher. For ease of explanation, Figure 3 the range boundary of the safety zone B is schematically represented by a dashed line.

[0055] In step S200, the safe starting point refers to a specific cutting starting point on the cutting trajectory within the safety zone. That is, the projection position of the safe starting point on the projection plane needs to be within the range of the safety zone.

[0056] Please refer to Figure 1 and Figure 4 , for step S200, the method for determining whether the cutting trajectory has a safe starting point within the safety zone comprises:

[0057] Step S210, determining whether all cutting trajectories are outside the safety zone;

[0058] If yes, step S211 is performed to determine that the cutting trajectory does not have a safe starting point;

[0059] If no, steps S212 and S213 are performed:

[0060] Step S212, obtaining a plurality of candidate starting points on the cutting trajectory according to the pre-device selection rule;

[0061] Step S213, determining whether all candidate starting points are outside the safety zone;

[0062] If yes, performing step S2131, determining that the cutting trajectory does not have a safe starting point;

[0063] If no, performing step S2132, determining that the cutting trajectory has a safe starting point.

[0064] Among them, whether all cutting trajectories are outside the safety zone and whether all candidate starting points are outside the safety zone can be determined by judging the relationship between the projection of the cutting trajectory and the candidate starting point on the projection plane and the safety zone.

[0065] In actual application scenarios, it can also be determined by whether the coordinate information of the cutting trajectory on the projection plane and the coordinate information of the candidate starting point on the projection plane are within the coordinate range of the safety zone.

[0066] Since it is determined whether all cutting trajectories are outside the safety zone, and in the case that all cutting trajectories are outside the safety zone, it is determined that the cutting trajectory does not have a safe starting point, a rough judgment can be made more quickly, and a micro-continuous segment can be directly added in the cutting trajectory in a positive case, thereby improving the processing efficiency.

[0067] Further, when the cutting trajectory is at least partially inside the safety zone, since a plurality of candidate starting points are obtained on the cutting trajectory according to the pre-device selection rule, and based on the result of determining whether all candidate starting points are outside the safety zone, it is determined that the cutting trajectory has or does not have a safe starting point, the risk of missing adding a micro-continuous segment can be reduced when the cutting trajectory is at least partially inside the safety zone but all candidate starting points are outside the safety zone, thereby facilitating further improvement of processing safety.

[0068] In yet another embodiment, referring to Figure 5 For step S200, the method for determining whether the cutting trajectory has a safe starting point inside the safety zone includes:

[0069] Step S221, obtaining a plurality of candidate starting points on the cutting trajectory according to the pre-device selection rule;

[0070] Step S222, determining whether all candidate starting points are outside the safety zone;

[0071] If yes, performing step S2221, determining that the cutting trajectory does not have a safe starting point;

[0072] If no, performing step S2222, determining that the cutting trajectory has a safe starting point.

[0073] Thus, more direct and accurate judgment can be achieved to reduce the risk of missing adding micro-segments when all the candidate starting points are outside the safety zone, thereby further improving the processing safety.

[0074] In some embodiments, the method of obtaining a plurality of candidate starting points on the cutting trajectory according to the pre-selection rule in steps S211 and S221 includes: step S201, obtaining a plurality of candidate starting points according to pre-selection starting point conditions.

[0075] The pre-selection starting point conditions include at least one of the following types:

[0076] 1) the midpoint of the long side in the cutting trajectory that is longer than a preset length;

[0077] 2) the midpoint of the line segment in the bounding box boundary corresponding to the two-dimensional expansion of the cutting trajectory;

[0078] 3) a plurality of preset sampling points on the distal boundary of the cutting trajectory;

[0079] 4) the midpoint of a specified long side of the cutting trajectory outside the cutting line;

[0080] 5) the endpoint of the micro-segment in the cutting trajectory.

[0081] The various types of candidate starting points will be further described below to facilitate understanding.

[0082] 1) the midpoint of the long side in the cutting trajectory that is longer than a preset length.

[0083] Generally, in the case of taking a point on the short side as the cutting starting point or taking the endpoint of the line segment as the cutting starting point, the deviation of the cut pattern is large and it is not easy to perforate during cutting, resulting in poor cutting effect. Therefore, the midpoint of the long side longer than the preset length is used as the candidate starting point, which excludes the selection of candidate starting points on too short sides and the endpoint of the line segment to form a safe starting point, thereby improving the cutting precision and cutting effect of laser cutting.

[0084] In some embodiments, the preset length is 5 mm.

[0085] 2) the midpoint of the line segment in the bounding box boundary corresponding to the two-dimensional expansion of the cutting trajectory.

[0086] By taking the midpoint of the line segment in the bounding box boundary corresponding to the two-dimensional expansion of the cutting trajectory as the pre-selection starting point condition, corresponding candidate starting points can be provided for the case where the cutting trajectory contains an arc or the cutting trajectory is circular, elliptical, etc.

[0087] 3) a plurality of preset sampling points on the distal boundary of the cutting trajectory.

[0088] Specifically, the distal boundary of the cutting trajectory refers to a boundary having a maximum Z-axis coordinate on the cutting trajectory.

[0089] By taking the preset sampling points on the distal boundary of the cutting trajectory as the alternative starting points, the risk of the jaw of the laser processing equipment being empty during the feeding process can be reduced.

[0090] Further, the preset sampling points can be directly selected by the technician or selected according to a certain preset sampling rule.

[0091] For example, the specific number of preset sampling points, the distribution manner of preset sampling points, etc. can be preset as the sampling rule.

[0092] In some embodiments, the preset sampling points are multiple and uniformly distributed on the distal boundary of the cutting trajectory. For example, 5 preset sampling points uniformly distributed on the distal boundary of the cutting trajectory are taken as the alternative starting points.

[0093] 4) the midpoint of the designated long side of the cutting trajectory outside the cutting-off line.

[0094] The cutting-off line is one of the cutting trajectories, and the cutting-off line is usually used to cut off the pipe material so that the finished part falls off.

[0095] The designated long side refers to a line segment formed by all line segments connected end to end on the same straight line after the cutting trajectory is unfolded in two dimensions.

[0096] Specifically, for example, when cutting a pipe material with a circular cross-section according to a rectangular cutting trajectory, since the surface of the pipe material is an arc surface, the cutting trajectory formed after the rectangular cutting trajectory is unfolded in two dimensions will include multiple continuous line segments connected end to end on the same straight line, and a long line segment is ultimately formed by the multiple continuous line segments connected end to end.

[0097] 5) the endpoint of the micro-continuous segment in the cutting trajectory.

[0098] That is to say, when the cutting trajectory itself has a micro-continuous segment, the endpoint of the micro-continuous segment can be taken as the alternative starting point.

[0099] It should be understood that the types of preset alternative starting point conditions can be one, two, multiple, or all of the above types. When a smaller number of types are used, the processing efficiency can be improved, and when a larger number of types are used, more alternative starting points can be provided for selection of a safe starting point within the safety zone.

[0100] In actual application scenarios, the pre-equipment selection starting point condition can also be selected based on the pre-judgment of the graphics of the cutting trajectory. For example, when the cutting trajectory includes an arc or a circle, the midpoint of the line segment of the bounding box boundary after two-dimensional expansion of the cutting trajectory can be selected as the pre-equipment selection starting point condition to obtain the candidate starting point; when the cutting trajectory is a rectangle on a pipe with a circular cross section, the midpoint of the long side of the cutting trajectory above the preset length, the midpoint of the specified long side of the cutting trajectory outside the cutting line, and the like can be selected as the pre-equipment selection starting point condition to obtain the candidate starting point.

[0101] In some embodiments, the method of obtaining a plurality of candidate starting points on the cutting trajectory according to the pre-equipment selection rule in steps S211 and S221 further includes step S202 of sorting the plurality of candidate starting points according to a preset sorting rule to form a candidate starting point list.

[0102] Further, the preset sorting rule includes:

[0103] 1) The candidate starting points are sorted based on the Z-axis coordinates of the candidate starting points, and the candidate starting point with a larger Z-axis coordinate is given priority over the candidate starting point with a smaller Z-axis coordinate;

[0104] 2) When the Z-axis coordinates of the plurality of candidate starting points are the same, the candidate starting points are sorted based on a preset category priority.

[0105] That is, the candidate starting point with a larger coordinate on the Z-axis has a higher sorting priority, and when the coordinates of two or more candidate starting points on the Z-axis are the same, the candidate starting points are sorted based on the preset category priority.

[0106] By giving priority to the candidate starting point with a larger Z-axis coordinate over the candidate starting point with a smaller Z-axis coordinate in sorting, the risk of the clamping jaw of the laser processing equipment being empty during processing can be better reduced.

[0107] In some embodiments, the preset category priority is, in sequence: the endpoint of the micro-continuous segment in the cutting trajectory, the midpoint of the specified long side of the cutting trajectory outside the cutting line, the midpoint of the long side of the cutting trajectory above the preset length, the midpoint of the line segment in the bounding box boundary corresponding to the cutting trajectory after two-dimensional expansion, and a plurality of preset sampling points on the distal boundary of the cutting trajectory.

[0108] In order to more clearly illustrate, the preset category priority is shown as follows: the endpoint of the micro-continuous segment in the cutting trajectory > the midpoint of the specified long side of the cutting trajectory outside the cutting line > the midpoint of the long side of the cutting trajectory above the preset length > the midpoint of the line segment in the bounding box boundary corresponding to the cutting trajectory after two-dimensional expansion > a plurality of preset sampling points on the distal boundary of the cutting trajectory.

[0109] By taking the end point of the micro-continuous section in the cutting trajectory as the highest priority alternative starting point, the laser cutting head's tool path logic can be conveniently planned, cutting time can be saved, and cutting efficiency can be improved.

[0110] Of course, in some other embodiments, other sorting methods can also be used.

[0111] Please refer to Figure 6 If it is determined that any of the alternative starting points is in the safety zone, the step S2132 of determining that the cutting trajectory has a safe starting point further comprises:

[0112] S21321, in turn, determines whether the alternative starting points in the alternative starting point list are in the safety zone until the first alternative starting point in the safety zone appears;

[0113] S21322, the first alternative starting point in the safety zone is taken as the safe starting point.

[0114] Thus, the safe starting point of the cutting trajectory is obtained, and the step S400 can be continued.

[0115] In some other embodiments, the step of determining that the cutting trajectory has a safe starting point further comprises: traversing all alternative starting points in the alternative starting point list, and determining whether each alternative starting point is in the safety zone; and selecting any alternative starting point in the safety zone as the safe starting point of the cutting trajectory.

[0116] In some embodiments, for the step S300, if the cutting trajectory does not have a safe starting point, and the cutting trajectory does not have a micro-continuous section, the step of adding a micro-continuous section to the cutting trajectory further comprises: if the cutting trajectory does not have a safe starting point, and the cutting trajectory does not have a micro-continuous section, a micro-continuous section is added to the cutting trajectory, and a non-safety zone prompt is made.

[0117] Therefore, by warning the technician and specifically enhancing the technician's attention, the safety risk is further reduced.

[0118] Correspondingly, the embodiment of the application also provides a laser cutting system adopting the above laser cutting method, and the laser cutting system is suitable for a rotary disc type laser processing device.

[0119] For the system embodiment, since it basically corresponds to the method embodiment, the relevant parts are described with reference to the method embodiment.

[0120] The application also provides an electronic device, which comprises a processor and a memory; the memory stores a program that can be called by the processor; when the processor executes the program, the laser cutting method in the foregoing embodiments is implemented.

[0121] The application further provides a machine readable storage medium, which stores a program, and the program is executed by a processor to realize the laser cutting method in the foregoing embodiments.

[0122] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A laser cutting method suitable for a laser processing apparatus of a rotary table type, characterized by, The laser cutting method comprises: Obtaining a safety zone based on a feeding support of the laser processing equipment; in a projection plane perpendicular to the feeding direction, the area where the feeding support supports the material corresponds to a support angle, and the method for obtaining the safety zone comprises: obtaining the safety zone based on the support angle of the feeding support, wherein the safety zone is within the range of the support angle; Determining whether the cutting track has a safe starting point within the safety zone; If the cutting track has the safe starting point, adjusting the starting point of the cutting track to the safe starting point; If the cutting track does not have the safe starting point and does not have a micro-connection segment on the cutting track, adding a micro-connection segment on the cutting track.

2. The laser cutting method according to claim 1, characterized in that, Further comprising: If the cutting track does not have the safe starting point, making a not-in-safety-zone prompt.

3. The laser cutting method of claim 1, wherein, The method for determining whether the cutting track has a safe starting point comprises: if all the cutting tracks are outside the safety zone, the cutting track does not have the safe starting point.

4. The laser cutting method according to claim 3, characterized in that, The method for determining whether the cutting track has a safe starting point further comprises: If the cutting track is at least partially within the safety zone, obtaining a plurality of alternative starting points on the cutting track according to pre-equipment selection rules; If all the alternative starting points are outside the safety zone, the cutting track does not have the safe starting point; If any of the alternative starting points is within the safety zone, the cutting track has the safe starting point.

5. The laser cutting method of claim 1, wherein, The method for determining whether the cutting track has a safe starting point comprises: Obtaining a plurality of alternative starting points on the cutting track according to pre-equipment selection rules; If all the alternative starting points are outside the safety zone, the cutting track does not have the safe starting point; If any of the alternative starting points is within the safety zone, the cutting track has the safe starting point.

6. The laser cutting method according to claim 4 or 5, characterized in that, The method for obtaining a plurality of alternative starting points on the cutting track according to pre-equipment selection rules comprises: obtaining a plurality of the alternative starting points according to pre-equipment selection starting point conditions; The pre-equipment selection starting point conditions comprise at least one of the following types: A long side midpoint in the cutting track that is longer than a preset length; A midpoint of a line segment in the bounding box boundary corresponding to the cutting track after two-dimensional expansion; A plurality of preset sampling points on the distal boundary of the cutting track; A midpoint of a specified long side of the cutting track outside the cutting-off line, the specified long side being a line segment formed by all line segments connected head to tail on the same line after two-dimensional expansion of the cutting track; An endpoint of a micro-connection segment in the cutting track.

7. The laser cutting method of claim 6, wherein, The method for obtaining a plurality of alternative starting points on the cutting track according to pre-equipment selection rules further comprises: sorting a plurality of the alternative starting points according to a preset sorting rule to form an alternative starting point list.

8. The laser cutting method of claim 7, wherein, The preset sorting rule comprises: Sorting each of the alternative starting points based on the Z-axis coordinate of each of the alternative starting points, with the alternative starting point with a larger Z-axis coordinate being prioritized over the alternative starting point with a smaller Z-axis coordinate, the Z-axis being a coordinate axis parallel to the feeding direction, and the Z-axis coordinate decreasing in the feeding direction; When the Z-axis coordinates of a plurality of alternative starting points are the same, sorting based on preset type priority.

9. The laser cutting method of claim 8, wherein, The preset category priority is in turn: an endpoint of a micro-segment in the cutting track, a midpoint of a specified long side of the cutting track other than the cutting line, a long side midpoint in the cutting track above a preset length, a segment midpoint in a bounding box boundary corresponding to the cutting track after two-dimensional unfolding, and a plurality of preset sampling points on a distal boundary of the cutting track.

10. The laser cutting method according to claim 8 or 9, characterized in that, If any of the alternative starting points is in the safety zone, the cutting track has the safety starting point further comprising: In turn, determine whether an alternative starting point in the list of alternative starting points is in the safety zone until the first alternative starting point in the safety zone appears; The first alternative starting point in the safety zone is taken as the safety starting point.

11. A laser cutting system, adapted for a laser machining apparatus of the rotary table type, characterized in that, The laser cutting method as claimed in any one of claims 1-10.

12. An electronic device, comprising: A computer program product comprising a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor implements the steps of the method of any one of claims 1-10 when executing the program.

13. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program product, when executed by the processor, implements the steps of the method of any one of claims 1-10.

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