Laser marking filling method, marking device and readable storage medium

Abstract

The present application relates to the field of laser marking technology, and discloses a laser marking filling method, a marking device, and a readable storage medium. The laser marking filling method includes: dividing the target area of ​​the workpiece to be marked into multiple filling layers; rotating the filling line by a preset angle each time to perform multiple line fillings on each filling layer of the target area to obtain a multi-layer filling line layer; scanning and processing the target area layer by layer according to the multi-layer filling line layer; performing edge wrapping on the target area after scanning and processing to close the outline of the target area to obtain a laser-marked workpiece. The laser marking filling method also includes: adjusting the starting offset and the ending offset of the filling line to delete or extend the filling line that exceeds or does not reach the edge of the target area. The laser marking filling method enables the target area of ​​the workpiece to receive laser energy evenly, and the edges are integrated, greatly improving the processing quality of the workpiece.

Description

Technical Field

[0001] The present application relates to the field of laser marking technology, and in particular to a laser marking filling method, a marking device and a readable storage medium. Background Art

[0002] The marking equipment uses a computer to effectively control the laser marking equipment and complete the processing tasks according to the different requirements of the user. The marking equipment includes a laser marking control card, visual positioning and supporting software. In the process of the marking equipment controlling the laser marking equipment to process the workpiece, the processing effect on the target area of ​​the workpiece is not uniform enough. Moreover, due to the high processing speed of the laser marking equipment, it is easy to cause the motion and the laser to be mismatched, so that the actual light position and the pattern have a certain difference. At present, the existing technology has the problem that the effect of laser marking on the workpiece is not smooth enough, and the edge of the target area after laser marking is not consistent enough. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a laser marking filling method, a marking device and a readable storage medium, which can effectively solve the problem that the laser processing effect does not meet expectations.

[0004] In a first aspect, an embodiment of the present application provides a laser marking filling method, comprising:

[0005] Dividing the target area of ​​the workpiece to be marked into a plurality of filling layers;

[0006] Rotate the filling line by a preset angle each time to perform multiple line filling on each of the filling layers of the target area to obtain multiple filling line layers;

[0007] Scanning and processing the target area layer by layer according to the multiple filling line layers;

[0008] The target area after the scanning process is subjected to edge rounding processing to close the contour of the target area to obtain the laser-marked workpiece.

[0009] In a first possible embodiment of the first aspect, the laser marking filling method further includes:

[0010] Calculating the spacing of the filling lines as a whole according to the shape characteristics of the target area so that the filling lines are evenly distributed according to the preset spacing;

[0011] The start offset and the end offset of the fill line are adjusted to delete or extend the fill line that exceeds or does not reach the edge of the target area.

[0012] In a second possible embodiment of the first aspect, rotating the filling line by a preset angle each time to perform multiple line filling on each filling layer of the target area to obtain multiple filling line layers includes:

[0013] The filling line fills the entire target area according to the preset spacing according to the initial marking direction to determine an initial filling line layer of the target area.

[0014] In a third possible embodiment of the first aspect, the preset angle is obtained by equally dividing the effective filling angle of the filling line according to the number of the filling layers, and the filling line is rotated by the preset angle each time to perform multiple line fillings on each filling layer of the target area to obtain multiple filling line layers, further comprising:

[0015] According to the direction having the preset angle with the initial marking direction, the filling line is used to fill the entire target area multiple times at the preset interval to determine multiple filling line layers in the target area.

[0016] In a fourth possible embodiment of the first aspect, adjusting the start offset and the end offset of the fill line to delete or extend the fill line that exceeds or does not reach the edge of the target area includes:

[0017] The starting filling position and the ending filling position of each filling line are respectively offset positively and negatively according to the offset step size and the offset direction, so as to extend or delete the filling lines that do not reach or exceed the edge of the target area.

[0018] In a fifth possible embodiment of the first aspect, the laser marking filling method further includes:

[0019] Inspecting the laser-marked workpiece to determine an error distance of the laser marking on the workpiece;

[0020] The number of laser spots required to supplement the error distance is calculated, and the error distance is supplemented according to the number of laser spots.

[0021] In a sixth possible embodiment of the first aspect, the workpiece includes a plurality of target areas, and the method further includes:

[0022] Line filling is performed on each of the target areas separately to determine the filling lines of each of the target areas of the workpiece.

[0023] In a seventh possible embodiment of the first aspect, the effective filling angle is [0, 180 degrees].

[0024] In a second aspect, an embodiment of the present application provides a marking device, which includes a processor and a memory, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement the laser marking filling method described above.

[0025] In a third aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, which, when executed on a processor, implements the laser marking and filling method described above.

[0026] The embodiments of the present application have the following beneficial effects:

[0027] A laser marking filling method of the present embodiment includes: dividing the target area of ​​the workpiece to be marked into multiple filling layers; rotating the filling line by a preset angle each time to perform multiple line fillings on each filling layer of the target area to obtain multiple layers of filling line layers; scanning and processing the target area layer by layer according to the multiple layers of filling line layers; performing edge wrapping on the target area after scanning and processing to close the outline of the target area to obtain a laser-marked workpiece. The laser marking filling method also includes: adjusting the starting offset and ending offset of the filling line to delete or extend the filling line that exceeds or does not reach the edge of the target area. Based on the above scheme, the laser marking filling method can make the target area of ​​the workpiece receive laser energy evenly, and the edge is integrated, which greatly improves the processing quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A first schematic flow chart of the laser marking and filling method according to an embodiment of the present application is shown;

[0030] Figure 2 A second schematic flow chart of the laser marking and filling method according to an embodiment of the present application is shown;

[0031] Figure 3 A third flow chart of the laser marking and filling method according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with 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 of the embodiments.

[0033] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0034] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0035] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0036] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] The marking equipment is a high-precision automated processing system that integrates a laser marking control card, a visual positioning system, and supporting software. The laser marking control card is used to exchange and manage data with the visual positioning system and supporting software through various interfaces. The visual positioning system is used to capture, analyze, and process images of the workpiece to identify and locate the target area, thereby achieving precision control and optimizing the processing effect. The supporting software generally includes an external industrial host or PC software and the underlying driver software embedded in the laser marking control card, which is used to control and manage the operation and processing parameters of the laser processing equipment. At the same time, it can also process and manage the data provided by the visual positioning system to achieve full process control of the processing task.

[0038] Marking equipment generally compensates for processing errors by adjusting parameters, but this will inevitably reduce the processing speed. It takes a certain amount of experience and time to fully adjust, and it is inevitable that the laser processing effect will be uneven. In response to the above problems, the present application provides a laser marking filling method, which achieves uniform processing of the target area of ​​the workpiece by setting multiple layers of filling lines. The laser marking filling method also effectively compensates for processing errors by adjusting the offset of the filling lines.

[0039] The laser marking and filling method is described below in conjunction with some specific embodiments.

[0040] Figure 1 A flow chart of the laser marking filling method of an embodiment of the present application is shown. Exemplarily, the laser marking filling method includes the following steps:

[0041] S110, dividing a target area of ​​the workpiece to be marked into a plurality of filling layers.

[0042] Specifically, after the laser is focused, the spot is very small, at the micron level. For the surface processing of the target area, the spot must fill the surface of the target area. The laser marking filling method first fills the target area with lines, and then uses the circular feature of the laser spot to arrange the spots according to the filling lines to complete the processing of a filling line. By doing this for each filling line, the filling scan of the entire target area can be completed. Due to the circular feature of the laser spot, there will always be blanks between adjacent spots, which will cause uneven filling, that is, the filling surface is not smooth enough. The laser marking filling method divides the target area into multiple filling layers, and fills the filling lines in the target area in staggered layers, which can effectively cover the blanks flowing out of the edge of the circular spot, so that the filling surface is covered by laser irradiation more than twice, thereby achieving uniform surface processing of the target area of ​​the workpiece.

[0043] S120, rotating the filling line by a preset angle each time, so as to perform multiple line fillings on each filling layer of the target area, and obtain multiple filling line layers.

[0044] Exemplarily, the laser marking filling method adjusts the initial marking direction according to a preset angle, and sequentially fills each filling layer with lines. The laser marking filling method also sequentially arranges the filling lines in each filling layer according to a preset spacing so that the target area is completely covered by the filling lines.

[0045] For example, in one embodiment, the laser marking filling method rotates the filling line by a preset angle each time to perform multiple line fillings on each filling layer of the target area to obtain a multi-layer filling line layer, including: filling the entire target area with the filling line at a preset spacing according to the initial marking direction to determine the initial filling line layer of the target area.

[0046] Optionally, the initial marking direction may be horizontal, and the laser marking filling method connects the target area from one edge of the target area to the other edge in the horizontal direction to form a filling line, and then fixes the preset spacing in the vertical direction, repeatedly connects the edge points on both sides until the filling line fills the entire target area. When the preset spacing is within a certain range, it cannot be distinguished by the naked eye, and the target area is completely covered and filled by the filling line.

[0047] For example, in one embodiment, the preset angle is obtained by equally dividing the effective filling angle of the filling line according to the number of filling layers, and the filling line is rotated by the preset angle each time to perform multiple line fillings on each filling layer of the target area to obtain a multi-layer filling line layer, and also includes: filling the entire target area with the filling line at a preset spacing for multiple times according to a direction having a preset angle with the initial marking direction to determine the multi-layer filling line layer of the target area.

[0048] Optionally, the effective filling angle is [0, 180 degrees], and the laser marking filling method divides the effective filling angle into equal parts according to the number of filling layers to obtain a preset angle, the number of filling layers is at least two, and the preset angle can be 90 degrees, 60 degrees, and 45 degrees, etc. Among them, the more filling layers there are, the more uniform the filling effect in the target area. For example, when the preset angle is 60 degrees, after obtaining the initial filling line layer, the laser marking filling method rotates the initial marking direction by 60 degrees to obtain the second marking direction, and according to the second marking direction, the second filling layer of the target area is line filled to determine the second filling line layer. After determining the second filling line layer, the laser marking filling method rotates the second marking direction by 60 degrees to obtain a third marking direction, and according to the third marking direction, the third filling line layer of the target area is line filled to determine the third filling line layer. After the initial filling line layer, the second filling line layer, and the third filling line layer are determined, the laser marking device can scan and process the target area layer by layer according to each filling line layer. It can be understood that the laser marking filling method can achieve line filling at different preset angles, thereby making the filling lines in the target area more uniform.

[0049] In one embodiment, if Figure 2 As shown, the laser marking filling method also includes the following steps:

[0050] S121, comprehensively calculating the spacing of the filling lines according to the shape characteristics of the target area, so that the filling lines are evenly distributed according to the preset spacing.

[0051] Specifically, the shape feature of the target area is the projection length of the target area in all directions. The laser marking filling method allows the user to set the spacing of the filling lines, but the spacing of the filling lines set by the user cannot be evenly distributed in the target area. Therefore, the laser marking filling method calculates a reasonable preset spacing according to the projection length of the target area in all directions to make the spacing of the filling lines evenly distributed. For example, the user sets the spacing of the filling lines in a certain direction to 0.05 cm. When the distance between the last filling line and the edge of the target area is 0.07 cm, another filling line is filled, and the distance between the filling line and the edge of the target area is 0.02 cm. Obviously, the filling lines are unevenly distributed. After the overall calculation of the laser marking filling method, the spacing can be adjusted from 0.05 cm to 0.048 cm, so that the filling lines are evenly distributed in the target area.

[0052] S122, adjusting the start offset and the end offset of the filling line to delete or extend the filling line that exceeds or does not reach the edge of the target area.

[0053] In one embodiment, the laser marking filling method adjusts the starting offset and ending offset of the fill line to delete or extend the fill line that exceeds or does not reach the edge of the target area, including: performing positive and negative offsets on the starting fill position and ending fill position of each fill line according to the offset step and offset direction, respectively, to extend or delete the fill line that does not reach or exceeds the edge of the target area.

[0054] Specifically, the marking device is used to send a control signal to the laser marking device to control the galvanometer scanning axis in the laser marking device to drive the galvanometer scanning lens to move, wherein the galvanometer scanning lens is used to quickly scan the laser beam, but because the galvanometer scanning axis and the galvanometer scanning lens have a certain inertia, the movement of the galvanometer scanning axis and the galvanometer scanning lens will be slower than the generation of the laser beam. Although the laser beam can be set to be generated more slowly at this time, that is, the laser beam is delayed for a certain period of time to wait for the inertia of the galvanometer scanning axis and the galvanometer scanning lens to be eliminated, when processing the fill line at this time, the upper and lower fill lines will form a serrated shape on both sides, which is mainly reflected in the processing end of the fill line. The fill line will be shorter than the ideal fill line. In the process of controlling the laser marking device by the marking device, the fill line may also be longer than the ideal fill line. The inequality between the fill line and the ideal fill line will cause the edge of the target area to be inconsistent after laser marking. Therefore, the laser marking filling method can set extension lines or deletion lines at the starting filling position and the ending filling position of the filling line in advance, so as to perform positive and negative offsets on the starting filling position and the ending filling position of each filling line, respectively, wherein the positive and negative offsets of the starting filling position and the ending filling position of each filling line are based on the offset step and offset direction of each filling line, the offset step is the difference between the filling line and the ideal filling line, and the offset direction is the direction of the filling line. It can be understood that when the filling line is shorter than the ideal filling line, the laser marking filling method sets extension lines at the starting filling position and the ending filling position of each filling line, that is, performs positive offset, so that the filling line can be extended to be consistent with the ideal filling line. When the filling line is longer than the ideal filling line, the laser marking filling method sets deletion lines at the starting filling position and the ending filling position of each filling line, that is, performs negative offset, so that the filling line can be reduced to be consistent with the ideal filling line, so that both ends of each filling line are neatly consistent with the edge of the target area.

[0055] Optionally, the workpiece to be marked includes multiple target areas, and the laser marking filling method further includes: performing line filling on each target area separately to determine the filling lines of each target area of ​​the workpiece. Specifically, when the marking device selects multiple target areas in the workpiece for line filling, the laser marking filling method performs line filling on each target area separately based on each target area as a unit, without destroying the original independent structure of the workpiece, and can retain the independence of filling each target area.

[0056] S130, scanning and processing the target area layer by layer according to the multiple filling line layers.

[0057] Specifically, the marking device is used to control the laser marking head of the laser marking device to move along the path of each layer of filling line to achieve laser marking of the target area. Optionally, in actual applications, when the laser marking device jumps from one filling line to another to perform laser scanning, the laser is not turned off, but the laser energy is set to be smaller. At this time, the laser is not turned off, but is in the on state, but the laser energy is not large, and the laser marking head jumps quickly, so the laser cannot work on the target area. It can be understood that each time the laser is switched on and off, the laser energy has a process from zero to the set power, so it is more difficult to control the initial laser energy. Therefore, the marking device controls the workpiece to not turn off the laser during the processing process, reduces the number of laser switches, and thus makes the laser output energy uniform, so as to better achieve the effect of uniform processing of the target area.

[0058] In one embodiment, if Figure 3 As shown, the laser marking filling method also includes the following steps:

[0059] S131, inspecting the laser-marked workpiece to determine an error distance of the laser marking on the workpiece.

[0060] S132, calculating the number of laser spots required to supplement the error distance, and supplementing the error distance according to the number of laser spots.

[0061] Specifically, after the laser marking equipment completes the laser marking of the target area, the laser marking filling method also measures the error distance from the laser mark to the edge of the target area through two-dimensional inspection, and calculates the number of laser spots required to supplement the error distance based on the diameter of the laser spot. The error distance is supplemented according to the number of laser spots to laser mark the entire target area to avoid missing processing.

[0062] S140, performing edge wrapping processing on the target area after scanning and processing to close the outline of the target area to obtain a laser marked workpiece.

[0063] Specifically, after the laser marking device completes the laser marking of the target area, the marking device is also used to control the laser marking device to perform edge processing on the target area to achieve accurate marking of the edge of the target area. During the edge processing, the laser marking head will move along the edge of the target area and accurately aim the laser beam at a position corresponding to the edge of the target area to achieve the purpose of marking the target area around the edge.

[0064] The present application also provides a marking device, which can be applied to multiple laser processing fields, such as laser cutting, laser engraving, laser marking, etc., and has a wide range of application prospects. Exemplarily, the marking device includes a processor and a memory, wherein the memory stores a computer program, and the processor runs the computer program to enable the marking device to perform the above-mentioned laser marking filling method.

[0065] Among them, the processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, including a central processing unit (CPU), a graphics processing unit (GPU), a network processor (NP), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or at least one of other programmable logic devices, discrete gates or transistor logic devices, and discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., which can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.

[0066] The memory may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. Among them, the memory is used to store a computer program, and the processor can execute the computer program accordingly after receiving an execution instruction.

[0067] The present application also provides a computer-readable storage medium for storing a computer program used in the above-mentioned marking device. For example, the computer-readable storage medium may include, but is not limited to, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0068] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can also be implemented in other ways. The apparatus embodiments described above are merely schematic, for example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the apparatus, method and computer program product according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and a module, a program segment or a part of a code contains one or more executable instructions for implementing a specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0069] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0070] If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of each embodiment of the present application.

[0071] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A laser marking filling method, characterized in that: include: Dividing the target area of ​​the workpiece to be marked into a plurality of filling layers; Rotate the filling line by a preset angle each time to perform multiple line fillings on each of the filling layers of the target area to obtain multiple filling line layers, wherein the preset angle is obtained by equally dividing the effective filling angle of the filling line according to the number of the filling layers; Scanning and processing the target area layer by layer according to the multiple filling line layers; Performing edge rounding processing on the target area after the scanning process to close the contour of the target area to obtain the laser-marked workpiece; Also includes: Calculating the spacing of the filling lines as a whole according to the shape characteristics of the target area so that the filling lines are evenly distributed according to the preset spacing; Adjusting the starting offset and ending offset of the fill line to delete or extend the fill line that exceeds or does not reach the edge of the target area; wherein the starting filling position and the ending filling position of each fill line are respectively positively and negatively offset according to the offset step and the offset direction to extend or delete the fill line that does not reach or exceeds the edge of the target area; The step of rotating the filling line by a preset angle each time to perform multiple line filling on each filling layer of the target area to obtain multiple filling line layers includes: Filling the entire target area with the fill line at the preset interval according to the initial marking direction to determine an initial fill line layer of the target area; According to the direction having the preset angle with the initial marking direction, the filling line is used to fill the entire target area multiple times at the preset interval to determine multiple filling line layers in the target area.

2. The laser marking filling method according to claim 1, characterized in that: Also includes: Inspecting the laser-marked workpiece to determine an error distance of the laser marking on the workpiece; The number of laser spots required to supplement the error distance is calculated, and the error distance is supplemented according to the number of laser spots.

3. The laser marking filling method according to claim 1, characterized in that: The workpiece includes a plurality of target areas, and the method further includes: Line filling is performed on each of the target areas separately to determine the filling lines of each of the target areas of the workpiece.

4. The laser marking filling method according to claim 1, characterized in that: include: The effective filling angle is [0, 180 degrees].

5. A marking device, characterized in that: The marking device comprises a processor and a memory, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement the laser marking and filling method according to any one of claims 1 to 4.

6. A computer-readable storage medium, characterized in that: The computer program is stored therein, and when the computer program is executed on a processor, the laser marking and filling method according to any one of claims 1 to 4 is implemented.

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