CN116262303A - Laser marking method, device, equipment and storage medium - Google Patents
Laser marking method, device, equipment and storage medium Download PDFInfo
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- CN116262303A CN116262303A CN202111520990.8A CN202111520990A CN116262303A CN 116262303 A CN116262303 A CN 116262303A CN 202111520990 A CN202111520990 A CN 202111520990A CN 116262303 A CN116262303 A CN 116262303A
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- 238000010330 laser marking Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000009466 transformation Effects 0.000 claims abstract description 40
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- 230000006870 function Effects 0.000 claims description 136
- 238000006243 chemical reaction Methods 0.000 claims description 9
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Abstract
The invention relates to the field of industrial control, and discloses a laser marking method, a device, equipment and a storage medium, wherein the method comprises the following steps: acquiring a track function of a laser marking pattern; transforming the track function by using a transformation function to generate an intermediate function; acquiring initial marking parameters, and calculating coordinates of intermediate marking points according to the intermediate function and the initial marking parameters; and obtaining an inverse function of the transformation function, and converting the middle marking point coordinate according to the inverse function to generate the target marking point coordinate. The invention changes the coordinate parameters of the marking points by utilizing the intermediate function, ensures that the central area with the radius smaller than a certain range can be filled under the condition of meeting the continuous marking requirement of higher marking speed, and improves the integral marking speed.
Description
Technical Field
The present invention relates to the field of industrial control, and in particular, to a laser marking method, apparatus, device, and storage medium.
Background
Laser marking is one of the laser processing techniques, which is a method of irradiating a workpiece with a focused beam of laser light having a high energy density to evaporate or photophysically chemically change a surface material, leaving a permanent mark on the surface of the workpiece. The laser marking machine forms the required image-text mark by controlling the laser spot to move on the surface of the workpiece according to the track.
The multi-axis laser system controls the vibrating mirror to swing through angle jump of the motor to realize the movement of laser spots according to the track, and when the angle of the marking main ray is larger (such as theta=8 DEG) and the marking speed is higher (such as the speed is 600 mm/s) under the normal track planning, the marking pattern with the radius smaller than a certain range can appear because the jump speed of the vibrating mirror motor cannot follow the instruction and cannot be marked.
The situation can be improved by adopting different speed marking in areas with different radiuses through a layer marking method, but the overall marking speed of the layer marking is low, the marking is discontinuous, and the effect is poor.
Disclosure of Invention
The invention provides a laser marking method, a device, equipment and a storage medium, which can solve the problem that a central area with a radius smaller than a certain range cannot be marked with dots under the condition of meeting the continuous marking requirement of higher marking speed.
A laser marking method comprising:
acquiring a track function of a laser marking pattern;
transforming the track function by using a transformation function to generate an intermediate function;
acquiring initial marking parameters, and calculating intermediate marking point coordinates according to the intermediate function and the initial marking parameters;
and obtaining an inverse function of the transformation function, and converting the middle marking point coordinate according to the inverse function to generate a target marking point coordinate.
A laser marking apparatus comprising:
the receiving graphic module is used for acquiring a track function of the laser marking graphic;
the function transformation module is used for transforming the track function by using a transformation function to generate an intermediate function;
the middle marking point module is used for acquiring initial marking parameters and calculating middle marking point coordinates according to the intermediate function and the initial marking parameters;
and the target marking point module is used for acquiring an inverse function of the transformation function, converting the middle marking point coordinate according to the inverse function and generating a target marking point coordinate.
A computer device comprising a memory, a processor and computer readable instructions stored in the memory and executable on the processor, the processor implementing the laser marking method described above when executing the computer readable instructions.
One or more readable storage media storing computer-readable instructions that, when executed by one or more processors, cause the one or more processors to perform the laser marking method described above.
Compared with the prior art, the laser marking method, the laser marking device, the computer equipment and the storage medium not only improve the condition that the central area with the radius smaller than a certain range cannot be marked when the multi-axis laser system marks at a higher speed under the normal track planning by performing function transformation on the laser marking pattern, but also ensure that the amplitude of the jump of the vibrating mirror motor is smaller because the track marking points of the pattern after the function transformation are relatively more, so that the marking radius r after transformation and the amplitude theta of the swing angle of the motor corresponding to the marking radius r after the transformation are improved p Ratio r/theta of (2) p The deviation is less than a preset threshold in the range of r from 0 to 0.5mm. The invention utilizes the intermediate function to change the coordinate parameters of the marking pointsUnder the condition of meeting the continuous marking requirement of higher marking speed, the central area with the radius smaller than a certain range can be filled, and the integral marking speed is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a laser marking method of the present invention;
FIG. 2 is a laser marked pattern trace of an embodiment of the present invention;
FIG. 3 is an intermediate function graph trace of an embodiment of the present invention;
FIG. 4 is a block diagram of a laser marking device in an embodiment of the invention;
fig. 5 is a schematic diagram of a computer device in an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention discloses a laser marking method, which is shown in fig. 1 and comprises the following steps:
s10, acquiring a track function of the laser marking pattern.
Understandably, laser marked patterns are issued by a marking program. The laser marked patterns can be set according to actual needs, such as circles, spiral lines and the like. The track function refers to a functional representation of the laser marked pattern. For example, if the laser-marked pattern is circular, then its corresponding track function may be represented by an equation function for the circle. When laser marking is performed, the track coordinate points of the laser spots on the working surface need to meet the track function, and the corresponding laser marking patterns can be formed.
S20, transforming the track function by using a transformation function to generate an intermediate function.
It is understood that the intermediate function may be expressed as a product of a track function and a transformation function, and after the transformation of the function, a graph formed by track coordinate points of the intermediate function is different from a laser marking graph, for example, a circle becomes an ellipse after the transformation of the function, an equal-proportion enlarged circle, and the like. Compared with laser marking patterns before function transformation, patterns formed by track coordinate points of the intermediate function tend to have wider marking areas and correspond to more marking points.
S30, acquiring initial marking parameters, and calculating intermediate marking point coordinates according to the intermediate function and the initial marking parameters.
Understandably, the initial marking parameters include initial origin coordinates, marking speed, and system command period. The initial origin coordinates refer to the range of motion of the marking system when the marking system needs to determine the laser beam for marking for the track function corresponding to the intermediate function, and the initial origin coordinates are used for adjusting the position and focal length of the laser beam. The marking speed is a manually input parameter and can be adjusted according to the requirements of marking work. The marking program calls a system instruction period according to the input marking speed, wherein the instruction period refers to the interval time between two issuing instructions.
S40, obtaining an inverse function of the transformation function, and converting the middle marking point coordinate according to the inverse function to generate a target marking point coordinate.
Understandably, the inverse function of the transformation function represents the correspondence between the trajectory function and the intermediate function, and this correspondence may enable the intermediate marking point coordinate to satisfy the trajectory function of the laser marking pattern after conversion, so as to obtain the target marking point coordinate. The function of the intermediate function is to change the coordinate parameters of the laser marking points, so that the distribution of the laser marking points in the central area is more reasonable, and then the redistributed coordinates of the intermediate marking points are correspondingly generated into target marking points, so as to complete the track planning of the laser marking graph.
In step S20, optionally, a deviation of a ratio of the marking radius of the intermediate function to the motor angle swing amplitude within a specified marking radius range is smaller than a preset threshold;
the specified marking radius range comprises 0 to 0.5mm;
the preset threshold comprises 5% to 20%.
It will be appreciated that the transformation function selected during the transformation of the function is required to be such that the deviation of the ratio of the marking radius of the intermediate function to the amplitude of the motor angular oscillation is less than a predetermined threshold value, the predetermined marking radius range being defined as the central region of smaller radius, including 0 to 0.5mm, the predetermined threshold value being defined to control the deviation to a smaller range, including 5% to 20%. The marking radius comprises the distance from the origin of coordinates to each marking point, the laser beam corresponding to the origin of coordinates is perpendicular to the plane where the workpiece is located, and in the whole marking process, along with the continuous change of the marking radius from the marking starting point to the marking ending point, a certain swing amplitude is also generated at the motor angle of the vibrating mirror so as to realize the movement of the laser spots. The larger the ratio of the marking radius phase difference is between the marking point with the smallest radius and the marking point with the largest radius, the larger the deviation of the ratio of the marking radius to the motor angle swing amplitude is. Marking radius is smaller in a center area with smaller radius, but the phase difference between marking radii can be up to several times, and the motor angle swing range is limited, so that the deviation of the ratio of the marking radius to the motor angle swing amplitude is huge, and the situation that the motor jump speed cannot follow and cannot mark points possibly occurs. The parameters of the marking points can be changed by using function transformation, so that the proportion of marking radiuses of the intermediate functions is similar, and the deviation of the ratio of the marking radiuses to the motor angle swing amplitude is reduced.
Optionally, step S30, that is, the obtaining the initial marking parameter, calculates an intermediate marking point coordinate according to the intermediate function and the initial marking parameter, includes:
calculating an intermediate origin coordinate according to the intermediate function and the initial origin coordinate;
determining a step length according to the marking speed and the system instruction period;
and calculating the middle marking point coordinates according to the middle starting point coordinates, the middle function and the step length.
It is understood that the intermediate origin coordinates refer to the origin coordinates of the intermediate function track, and for different marked graphic tracks, the origin coordinates do not necessarily coincide with the origin coordinates, and the intermediate origin coordinates can be calculated according to the initial origin coordinates determined by the program and the intermediate function. The step length refers to the unit distance between two adjacent marking points, and is determined by the input marking speed and the system command period. Knowing the coordinates and step length of the middle starting point, determining the coordinates of the next marking point according to the middle function, and similarly obtaining all the coordinates of the middle marking point, wherein the track formed by the middle marking points corresponds to the middle function graph.
Optionally, after step S30, that is, the obtaining an inverse function of the transformation function, converting the intermediate punctuation point coordinate according to the inverse function, and generating the target punctuation point coordinate, further includes:
and converting the coordinates of the target marking points into amplitude data of the vibrating mirror through an amplitude coordinate conversion relation.
It will be appreciated that the laser spot moves in a trajectory over the surface of the workpiece to form a target laser marking pattern, the movement of the laser spot being controlled by two sets of galvanometers, each set of galvanometers in turn comprising two motors representing the x-direction and the y-direction, the motor angles corresponding to the amplitude data of the galvanometers, the motor angles being indicated by (AX 1, AY1, AX2, AY 2). The amplitude coordinate conversion relation refers to the corresponding relation between the coordinate of the marking point and the swing amplitude of the vibrating mirror, and the swing amplitude of the vibrating mirror is determined by the angle of the motor. In some examples, the amplitude coordinate scaling relationship may be a scaling formula or correction table between the coordinate of the marking point and the angle of the galvanometer motor. And converting the target marking point coordinates into motor angles according to the amplitude coordinate conversion relation, and enabling the motor angles to realize the track movement of the laser spots according to the target marking point coordinates through the swinging of the vibrating mirror.
The trace line of the laser marking pattern according to an embodiment of the present invention is shown in FIG. 2, and the function equation of the laser marking pattern according to the embodimentIs that
The trace is a spiral line. According to the laser marking method of the common track planning, an intermediate function is generated without function transformation, when the actual marking speed is less than or equal to 150mm/s, the central area can be smoothly filled, the condition of no point marking can not occur, and when the actual marking speed is greater than 150mm/s, the central area with smaller radius can have the residual condition due to no point marking. At a marking speed of 150mm/s, the step length of movement per unit time length is 0.00001×150=0.0015 mm.
The trace line of the intermediate function graph of an embodiment of the invention is shown in fig. 3, and the intermediate function equation generated by the function equation of the laser marked graph after the function transformation in the embodiment is that
The trace line is a spiral line with an enlarged central area. Comparing the step length of the movement under the unit time length when the marking speed before function conversion is 150mm/s, wherein the step length of the graph track of the intermediate function after function conversion is 0.0015/0.08 x 1.148=0.0215 mm, and the marking speed of the corresponding intermediate function is 0.0215/0.00001=2150 mm/s. In the practical test, the condition that center residues appear after the function transformation is performed and the marking speed is larger than 11000mm/s is started, and compared with the condition that the function transformation is not performed, the whole marking speed is improved by 5 times.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The invention provides a laser marking device which corresponds to the laser marking method one by one. As shown in fig. 4, the laser marking apparatus includes a reception graphic module 10, a function transformation module 20, an intermediate marking point module 30, and a target marking point module 40. The functional modules are described in detail as follows:
the receiving graphic module 10 is used for acquiring a track function of the laser marking graphic;
a function transformation module 20, configured to transform the trajectory function using a transformation function to generate an intermediate function;
an intermediate marking point module 30, configured to obtain an initial marking parameter, and calculate an intermediate marking point coordinate according to the intermediate function and the initial marking parameter;
the target marking point module 40 is configured to obtain an inverse function of the transformation function, and convert the intermediate marking point coordinate according to the inverse function to generate a target marking point coordinate.
Optionally, the deviation of the ratio of the marking radius of the intermediate function to the motor angle swing amplitude within the specified marking radius range is smaller than a preset threshold value.
Optionally, the specified marking radius range includes 0 to 0.5mm.
Optionally, the preset threshold comprises 5% to 20%.
Optionally, the initial marking parameters include initial origin coordinates, marking speed and system instruction period; the intermediate punctuation module 30 includes:
the starting point unit is used for calculating an intermediate starting point coordinate according to the intermediate function and the initial origin coordinate;
the step length unit is used for determining a step length according to the marking speed and the system instruction period;
and the marking point unit is used for calculating the middle marking point coordinate according to the middle starting point coordinate, the middle function and the step length.
Optionally, the laser marking device further includes:
and the conversion module is used for converting the coordinates of the target marking point into amplitude data of the vibrating mirror through an amplitude coordinate conversion relation.
For specific limitations of the laser marking device, reference may be made to the above limitations of the laser marking method, and no further description is given here. The various modules in the laser marking device described above may be implemented in whole or in part by software, hardware, or a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a terminal, and the internal structure of which may be as shown in fig. 5. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a readable storage medium, an internal memory. The non-volatile storage medium stores an operating system and computer readable instructions. The internal memory provides an environment for the execution of an operating system and computer-readable instructions in a readable storage medium. The network interface of the computer device is for communicating with an external server via a network connection. The computer readable instructions when executed by a processor implement a laser marking method. The readable storage medium provided by the present embodiment includes a nonvolatile readable storage medium and a volatile readable storage medium.
In one embodiment, a computer device is provided that includes a memory, a processor, and computer readable instructions stored on the memory and executable on the processor, when executing the computer readable instructions, performing the steps of:
acquiring a track function of a laser marking pattern;
transforming the track function by using a transformation function to generate an intermediate function;
acquiring initial marking parameters, and calculating intermediate marking point coordinates according to the intermediate function and the initial marking parameters;
and obtaining an inverse function of the transformation function, and converting the middle marking point coordinate according to the inverse function to generate a target marking point coordinate.
In one embodiment, one or more computer-readable storage media are provided having computer-readable instructions stored thereon, the readable storage media provided by the present embodiment including non-volatile readable storage media and volatile readable storage media. The readable storage medium has stored thereon computer readable instructions which when executed by one or more processors perform the steps of:
acquiring a track function of a laser marking pattern;
transforming the track function by using a transformation function to generate an intermediate function;
acquiring initial marking parameters, and calculating intermediate marking point coordinates according to the intermediate function and the initial marking parameters;
and obtaining an inverse function of the transformation function, and converting the middle marking point coordinate according to the inverse function to generate a target marking point coordinate.
Those skilled in the art will appreciate that implementing all or part of the above described embodiment methods may be accomplished by instructing the associated hardware by computer readable instructions stored on a non-volatile readable storage medium or a volatile readable storage medium, which when executed may comprise the above described embodiment methods. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A laser marking method, comprising:
acquiring a track function of a laser marking pattern;
transforming the track function by using a transformation function to generate an intermediate function;
acquiring initial marking parameters, and calculating intermediate marking point coordinates according to the intermediate function and the initial marking parameters;
and obtaining an inverse function of the transformation function, and converting the middle marking point coordinate according to the inverse function to generate a target marking point coordinate.
2. The laser marking method according to claim 1, wherein a deviation of a ratio of a marking radius of the intermediate function to a motor angular swing amplitude within a specified marking radius range is less than a preset threshold.
3. The laser marking method of claim 1, wherein the specified marking radius range comprises 0 to 0.5mm.
4. The laser marking method of claim 1, wherein the predetermined threshold comprises 5% to 20%.
5. The laser marking method according to claim 1, wherein the initial marking parameters include initial origin coordinates, marking speed, and system command period;
the obtaining the initial marking parameters, calculating the coordinates of the intermediate marking points according to the intermediate function and the initial marking parameters, includes:
calculating an intermediate origin coordinate according to the intermediate function and the initial origin coordinate;
determining a step length according to the marking speed and the system instruction period;
and calculating the middle marking point coordinates according to the middle starting point coordinates, the middle function and the step length.
6. The laser marking method according to claim 1, wherein the obtaining the inverse function of the transformation function, converting the intermediate marking point coordinates according to the inverse function, and after generating the target marking point coordinates, further comprises:
and converting the coordinates of the target marking points into amplitude data of the vibrating mirror through an amplitude coordinate conversion relation.
7. A laser marking apparatus, comprising:
the receiving graphic module is used for acquiring a track function of the laser marking graphic;
the function transformation module is used for transforming the track function by using a transformation function to generate an intermediate function;
the middle marking point module is used for acquiring initial marking parameters and calculating middle marking point coordinates according to the intermediate function and the initial marking parameters;
and the target marking point module is used for acquiring an inverse function of the transformation function, converting the middle marking point coordinate according to the inverse function and generating a target marking point coordinate.
8. The laser marking device of claim 7, wherein the initial marking parameters include initial origin coordinates, marking speed, and system command period;
the middle marking point module comprises:
the starting point unit is used for calculating an intermediate starting point coordinate according to the intermediate function and the initial origin coordinate;
the step length unit is used for determining a step length according to the marking speed and the system instruction period;
and the marking point unit is used for calculating the middle marking point coordinate according to the middle starting point coordinate, the middle function and the step length.
9. A computer device comprising a memory, a processor, and computer readable instructions stored in the memory and executable on the processor, wherein the processor, when executing the computer readable instructions, implements the laser marking method according to any one of claims 1 to 6.
10. One or more readable storage media storing computer-readable instructions that, when executed by one or more processors, cause the one or more processors to perform the laser marking method of any of claims 1-6.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116551215A (en) * | 2023-07-06 | 2023-08-08 | 北京新科以仁科技发展有限公司 | Laser scanning control method, device, equipment and storage medium of laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116551215A (en) * | 2023-07-06 | 2023-08-08 | 北京新科以仁科技发展有限公司 | Laser scanning control method, device, equipment and storage medium of laser |
| CN116551215B (en) * | 2023-07-06 | 2023-09-05 | 北京新科以仁科技发展有限公司 | Laser scanning control method, device, equipment and storage medium of laser |
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