Focusing method and system for laser engraving machine

Abstract

The application discloses a kind of focusing method and system of laser engraving machine, before laser engraving machine is engraved to the piece to be engraved, laser in laser engraving machine rises to the highest point;Laser is rapidly descended from the highest point, and acquisition signal is arrived;Local investigation is carried out based on the position where signal is arrived, to determine the focal point position, at this time, before laser engraving machine is engraved to the piece to be engraved, the focusing of laser is triggered, laser rises to the highest point, and is rapidly descended from the highest point, to carry out initial position investigation, further, local investigation is carried out based on the position where signal is arrived, to realize second position investigation, and improve the delicacy of local investigation, so as to determine the focal point position in local investigation, ensure the accuracy of focal point position, realize the rapid focusing of laser engraving machine and accurate focusing.

Description

Technical Field

[0001] This invention relates to the technical field of laser engraving machines, and more particularly to a focusing method and system for laser engraving machines. Background Technology

[0002] With the development of technology, laser engraving machines, as a type of engraving machine, are applied in people's lives and industrial fields. Laser engraving machines use lasers output by a laser to engrave the workpiece. Before engraving the workpiece, the laser needs to be focused. In the existing technology, the laser moves up and down and its position is adjusted by human intervention. At this time, the laser descends rapidly under human intervention and receives a position signal so that the position of the position signal can be used as the focus position. However, this focus position is affected by the rapid descent of the laser and signal delay, and is not the true focus position, affecting the accuracy of the focus position. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a focusing method and system for a laser engraving machine. Before the laser engraving machine engraves the workpiece, it triggers the laser to focus. The laser rises to its highest point and then rapidly descends from the highest point to perform an initial position check. Furthermore, based on the location of the positioning signal, a local check is performed to achieve a second position check, which improves the precision of the local check, so as to determine the focal position in the local check and ensure the accuracy of the focal position. This achieves rapid and precise focusing of the laser engraving machine.

[0004] To address the aforementioned technical problems, embodiments of the present invention provide a focusing method for a laser engraving machine, applied to the engraving scenario of a laser engraving machine; the focusing method for the laser engraving machine includes:

[0005] Before the laser engraving machine engraves the workpiece, raise the laser in the laser engraving machine to its highest position;

[0006] The laser rapidly descends from its highest point and acquires the positioning signal;

[0007] Based on the location of the arrival signal, a local investigation is conducted to determine the focal point.

[0008] Optionally, raising the laser in the laser engraving machine to its highest position before engraving the workpiece includes:

[0009] Before the laser engraving machine engraves the workpiece, the current position of the laser in the laser engraving machine is collected;

[0010] If the laser's current position is not at its highest point, then the laser will be triggered to rise.

[0011] During the laser's ascent, the laser gradually rises at a variable speed until it reaches its highest point.

[0012] Optionally, raising the laser in the laser engraving machine to its highest position before engraving the workpiece includes:

[0013] The distance between the current position of the laser and its highest point is collected;

[0014] The laser's rise parameter is defined based on the distance between the laser's current position and its highest point;

[0015] The model number of the laser being collected;

[0016] Model parameters are defined based on the model number of the laser, and the model parameters are associated with the rising parameters;

[0017] Match the corresponding speed-changing logic according to the model parameters and rise parameters, and trigger the speed-changing state of the laser based on the speed-changing logic.

[0018] Optionally, raising the laser in the laser engraving machine to its highest position before engraving the workpiece includes:

[0019] Record the laser's ascent process in real time and acquire signals;

[0020] If the signal is the upper limit signal, it will trigger the laser to adjust from the rising state to the stop state;

[0021] If the signal is not the upper limit signal, the laser is triggered to rise at a constant speed at the current rising speed.

[0022] Optionally, the laser rapidly descends from its highest point and acquires a positioning signal, including:

[0023] When the laser is at its highest point, the laser's autofocus logic is triggered.

[0024] In the autofocus logic of the laser, the laser descends rapidly from its highest point, with the descent speed exceeding the ascent speed.

[0025] Monitor the rapid descent of the laser and acquire the arrival signal;

[0026] Record the location of the position signal.

[0027] Optionally, the laser rapidly descends from its highest point and acquires a positioning signal, further comprising:

[0028] Collect the surface to be sculpted of the workpiece and define the height of the surface to be sculpted.

[0029] The height difference is determined based on the height of the surface to be carved and the height of the highest point of the workpiece.

[0030] The theoretical positioning position is predicted based on the height difference and the laser model.

[0031] The descent speed of the laser is defined based on the theoretical target position, the height of the highest point, and the laser model.

[0032] If the laser cannot acquire the positioning signal at the theoretical positioning position, it will move back and forth in stages based on the theoretical positioning position until the laser acquires the positioning signal.

[0033] Optionally, the step of performing local screening based on the location of the arrival signal to determine the focal location includes:

[0034] Acquire the arrival signal and define the location of the arrival signal;

[0035] Local inspection based on the location of the arrival signal triggering the laser;

[0036] During the local inspection of the laser, the laser is raised and lowered repeatedly at the location of the positioning signal, and the focusing status of the laser is monitored.

[0037] If the laser is in the preset focus state, then freeze the current position of the laser and define the current position as the focal point.

[0038] Optionally, the step of performing local inspection based on the location of the positioning signal to determine the focal position further includes: if the laser is in the process of local inspection, collecting the moving speed of the laser; the moving speed of the laser is less than the falling speed of the laser.

[0039] Optionally, the focusing method of the laser engraving machine further includes:

[0040] The laser rapidly descends from its highest point;

[0041] Monitor the laser's descent process until it reaches its lowest point;

[0042] During the process of the laser moving from the highest point to the lowest point, the positioning signal cannot be collected, and the number of times the laser cannot be detected is recorded.

[0043] If the number of times the laser fails to detect exceeds the preset number, a fault check of the laser will be triggered.

[0044] Optionally, the focusing system of the laser engraving machine is applied to the above-described focusing method for the laser engraving machine, and the focusing system of the laser engraving machine includes:

[0045] The lifting module is used to raise the laser in the laser engraving machine to its highest position before the laser engraving machine engraves the workpiece to be engraved;

[0046] The acquisition module is used to rapidly descend the laser from its highest point and acquire the positioning signal.

[0047] The local inspection module is used to perform local inspections based on the location of the arrival signal in order to determine the focus location.

[0048] In this embodiment of the invention, the method described herein involves raising the laser in the laser engraving machine to its highest position before the machine begins engraving the workpiece. The laser then rapidly descends from its highest position and acquires a positioning signal. Based on the position of the positioning signal, a local inspection is performed to determine the focal point. At this point, before the laser engraving machine begins engraving the workpiece, the laser is triggered to focus, rising to its highest position and rapidly descending to perform an initial position inspection. Further, a second position inspection is performed based on the position of the positioning signal, improving the precision of the local inspection and ensuring the accuracy of the focal point. This achieves rapid and precise focusing of the laser engraving machine. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a flowchart illustrating the focusing method of the laser engraving machine in an embodiment of the present invention;

[0051] Figure 2 This is a flowchart illustrating step S11 of the focusing method of the laser engraving machine in an embodiment of the present invention.

[0052] Figure 3 This is a flowchart illustrating step S12 of the focusing method for a laser engraving machine in an embodiment of the present invention.

[0053] Figure 4 This is a flowchart illustrating step S13 of the focusing method of the laser engraving machine in an embodiment of the present invention.

[0054] Figure 5 This is a schematic diagram of the structural composition of the focusing system of the laser engraving machine in an embodiment of the present invention;

[0055] Figure 6 This is a hardware diagram of an electronic device according to an exemplary embodiment. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] Example

[0058] Please see Figures 1 to 6 A focusing method for a laser engraving machine, applied to the engraving scene of the laser engraving machine; the focusing method for the laser engraving machine includes:

[0059] Step S11: Before the laser engraving machine engraves the workpiece, raise the laser in the laser engraving machine to its highest position; Step S12: The laser rapidly descends from its highest position and acquires a positioning signal;

[0060] Step S13: Perform a local inspection based on the location of the arrival signal to determine the focal point.

[0061] In this embodiment of the invention, the method described herein involves raising the laser in the laser engraving machine to its highest position before the machine begins engraving the workpiece. The laser then rapidly descends from its highest position and acquires a positioning signal. Based on the position of the positioning signal, a local inspection is performed to determine the focal point. At this point, before the laser engraving machine begins engraving the workpiece, the laser is triggered to focus, rising to its highest position and rapidly descending to perform an initial position inspection. Further, a second position inspection is performed based on the position of the positioning signal, improving the precision of the local inspection and ensuring the accuracy of the focal point. This achieves rapid and precise focusing of the laser engraving machine.

[0062] Please see Figure 2 In step S11, before the laser engraving machine engraves the workpiece, the laser in the laser engraving machine is raised to its highest position.

[0063] In the specific implementation of this invention, the specific steps can be as follows:

[0064] S111: Before the laser engraving machine engraves the workpiece, collect the current position of the laser in the laser engraving machine;

[0065] S112: If the current position of the laser is not the highest point, then trigger the laser to rise;

[0066] S113: During the laser's ascent, the laser gradually rises at a variable speed until it reaches its highest point.

[0067] In this embodiment of the invention, before the laser engraving machine engraves the workpiece, it is necessary to focus the laser of the laser engraving machine. At this time, the current position of the laser in the laser engraving machine is collected and compared with the position of the highest point. If the current position of the laser is not the highest point, the laser is triggered to rise so that the laser can rise from the current position to the highest point, thereby realizing the gradual focusing at the highest point, avoiding omissions, and being compatible with various focusing environments.

[0068] Therefore, during the laser's ascent, the laser gradually rises at a variable speed until it reaches the highest point. At this point, during the ascent to the highest point from the current position, the laser gradually rises at a variable speed and reaches the highest point with the fastest efficiency, ensuring efficiency before focusing. At the same time, it stops at the highest point to trigger the laser's descent for focusing.

[0069] Furthermore, the step of raising the laser in the laser engraving machine to its highest position before engraving the workpiece includes: acquiring the distance between the current position of the laser and the highest position; defining the laser's raising parameters based on the distance between the current position and the highest position; acquiring the model number of the laser; defining a model parameter based on the model number of the laser and associating the model parameter with the raising parameters; matching the corresponding speed-changing logic based on the model parameter and the raising parameters, and triggering the laser's speed-changing state based on the speed-changing logic.

[0070] At this point, the distance between the current position and the highest point of the laser is introduced. The laser's ascent parameter is defined by the distance between the current position and the highest point. The ascent parameter is then associated with the corresponding model of the laser. This allows for matching the corresponding speed-changing logic with the laser's model. The speed-changing logic controls the laser's ascent, enabling customized control of the laser's ascent. The speed-changing logic also triggers the laser's speed-changing state.

[0071] In addition, the step of raising the laser in the laser engraving machine to its highest position before engraving the workpiece also includes: recording the laser's rising process in real time and collecting signals; if the signal is a rising limit signal, the laser is triggered to adjust from the rising state to the stop state; if the signal is not a rising limit signal, the laser is triggered to rise at a constant speed at the current rising speed.

[0072] The system records the laser's ascent process in real time for monitoring. Simultaneously, it collects signals during the variable-speed ascent to control the laser based on the ascent limit signal. This triggers the laser to stop at its highest point. Alternatively, if the signal is not the ascent limit signal, the laser is triggered to ascend at a constant speed.

[0073] Please see Figure 3 In step S12, the laser rapidly descends from its highest point and acquires a positioning signal;

[0074] In the specific implementation of this invention, the specific steps can be as follows:

[0075] S121: When the laser is at its highest point, the laser's autofocus logic is triggered;

[0076] S122: In the autofocus logic of the laser, the laser descends rapidly from its highest point, where the descent speed of the laser is higher than the ascent speed of the laser.

[0077] S123: Monitor the rapid descent of the laser and acquire the arrival signal;

[0078] S124: Record the location of the position signal.

[0079] In the embodiments of this application, when the laser is at its highest point, the laser's autofocus logic is triggered to gradually achieve autofocus. During this process, the laser rapidly descends from its highest point, with the descent speed exceeding the ascent speed. Since this is the first descent and not a precise positioning operation, a rapid descent is employed to improve the laser's focusing efficiency. The rapid descent of the laser is monitored, and a positioning signal is acquired; the location of this positioning signal is recorded, but this location is not the final focus position.

[0080] Furthermore, the laser rapidly descends from its highest point and acquires a positioning signal, which also includes: acquiring the surface to be engraved of the workpiece and defining the height of the surface to be engraved; determining the height difference based on the height of the surface to be engraved and the height of the highest point; predicting the theoretical positioning position based on the height difference and the laser model; defining the descent speed of the laser based on the theoretical positioning position, the height of the highest point, and the laser model; if the laser cannot acquire a positioning signal at the theoretical positioning position, it performs phased reciprocating movements based on the theoretical positioning position until the laser acquires a positioning signal.

[0081] Please see Figure 4 S13: Conduct a local inspection based on the location of the arrival signal to determine the focal point;

[0082] In the specific implementation of this invention, the specific steps can be as follows:

[0083] S131: Acquire the arrival signal and define the location of the arrival signal;

[0084] S132: Local inspection based on the location of the laser triggered by the position signal;

[0085] S133: During the local inspection of the laser, the laser moves up and down repeatedly at the position of the positioning signal, and the focusing status of the laser is monitored.

[0086] S134: If the laser is in the preset focus state, freeze the current position of the laser and define the current position as the focus position.

[0087] In the embodiments of this application, a positioning signal is collected and the location of the positioning signal is defined so as to facilitate further control based on the location of the positioning signal, and a local investigation is carried out with the location of the positioning signal as the center, thereby conducting a range-based investigation of the location of the positioning signal.

[0088] At this time, a local inspection of the laser is triggered based on the location of the arrival signal; during the local inspection of the laser, the laser moves up and down repeatedly at the location of the arrival signal and the focus status of the laser is monitored; if the focus status of the laser is in the preset focus state, the current position of the laser is fixed and defined as the focus position.

[0089] In addition, the method of performing local inspection based on the location of the arrival signal to determine the focal position also includes: if the laser is in the process of local inspection, collecting the moving speed of the laser; if the moving speed of the laser is less than the falling speed of the laser, then local inspection is performed on the location of the arrival signal, and a smaller moving speed is used in the local inspection, and the inspection is performed based on the vertical position of the location of the arrival signal.

[0090] In addition, the focusing method of the laser engraving machine also includes: the laser rapidly descending from the highest point; monitoring the descent process of the laser until the laser reaches the lowest point; during the process of the laser moving from the highest point to the lowest point, if a positioning signal cannot be collected, the number of times the laser cannot be detected is recorded; if the number of times the laser cannot be detected exceeds a preset number, the laser fault diagnosis is triggered.

[0091] In the embodiments of this application, before the laser engraving machine engraves the workpiece, the laser in the laser engraving machine is raised to its highest position; the laser rapidly descends from its highest position and acquires a positioning signal; based on the position of the positioning signal, a local inspection is performed to determine the focal position. At this time, before the laser engraving machine engraves the workpiece, the laser is triggered to focus, the laser rises to its highest position, and then rapidly descends from its highest position to perform an initial position inspection. Furthermore, based on the position of the positioning signal, a second position inspection is performed, which improves the precision of the local inspection, so as to determine the focal position in the local inspection, ensuring the accuracy of the focal position, and realizing the rapid and precise focusing of the laser engraving machine.

[0092] Example

[0093] Please see Figure 5 , Figure 5 This is a schematic diagram of the focusing system of the laser engraving machine in an embodiment of the present invention.

[0094] like Figure 5 As shown, a focusing system for a laser engraving machine includes:

[0095] The lifting module 21 is used to raise the laser in the laser engraving machine to its highest position before the laser engraving machine engraves the workpiece to be engraved.

[0096] Acquisition module 22 is used to rapidly descend the laser from its highest point and acquire the arrival signal;

[0097] The local inspection module 23 is used to perform local inspections based on the location of the arrival signal in order to determine the focus location.

[0098] Example

[0099] Please see Figure 6 See below for reference. Figure 6 To describe an electronic device 40 according to this embodiment of the present invention. Figure 6 The electronic device 40 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.

[0100] like Figure 6As shown, the electronic device 40 is manifested in the form of a general-purpose computing device. The components of the electronic device 40 may include, but are not limited to: at least one processing unit 41, at least one storage unit 42, and a bus 43 connecting different system components (including storage unit 42 and processing unit 41).

[0101] The storage unit stores program code, which can be executed by the processing unit 41 to perform the steps described in the "Embodiment Methods" section of this specification according to various exemplary embodiments of the present invention.

[0102] Storage unit 42 may include a readable medium in the form of a volatile storage unit, such as random access memory (RAM) 421 and / or cache memory 422, and may further include a read-only memory (ROM) 423.

[0103] Storage unit 42 may also include a program / utility 424 having a set (at least one) of program modules 425, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0104] Bus 43 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the multiple bus structures.

[0105] Electronic device 40 can also communicate with one or more external devices (e.g., keyboard, pointing device, Bluetooth device, etc.), and with one or more devices that enable a user to interact with electronic device 40, and / or with any device that enables electronic device 40 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed through input / output (I / O) interface 44. Furthermore, electronic device 40 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) through network adapter 45. Figure 6 As shown, network adapter 45 communicates with other modules of electronic device 40 via bus 43. It should be understood that, although... Figure 6 As not shown, other hardware and / or software modules may be used in conjunction with electronic device 40, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup planning systems.

[0106] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, terminal device, or network device, etc.) to execute the methods according to the embodiments of this disclosure.

[0107] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. This program can be stored in a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk, etc. Furthermore, it stores computer program instructions, which, when executed by a computer, cause the computer to perform the methods described above.

[0108] Furthermore, the focusing method and system of the laser engraving machine provided in the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A focusing method for a laser engraving machine, characterized in that, The laser engraving machine is used in engraving scenarios; the focusing method of the laser engraving machine includes: Before the laser engraving machine engraves the workpiece, the laser in the laser engraving machine is raised to its highest position. This includes: acquiring the current position of the laser in the laser engraving machine before engraving the workpiece; if the current position of the laser is not the highest position, triggering the laser to rise; during the laser's rise, the laser gradually rises at a variable speed until it reaches the highest position; it also includes: acquiring the distance between the current position and the highest position of the laser; and defining the laser's rise parameters based on the distance between the current position and the highest position. The process includes: acquiring the model number of the laser; defining model parameters based on the laser model number and associating the model parameters with the ascent parameters; matching the corresponding speed-changing logic according to the model parameters and ascent parameters, and triggering the laser's speed-changing state based on the speed-changing logic; further including: recording the laser's ascent process in real time and acquiring signals; if the signal is an ascent limit signal, triggering the laser to adjust from the ascent state to the stop state; if the signal is not an ascent limit signal, triggering the laser to ascend at a constant speed at the current ascent speed. The laser rapidly descends from its highest point and acquires a positioning signal. This process also includes: acquiring the surface to be engraved on the workpiece and defining its height; determining the height difference based on the height of the surface and the highest point; predicting the theoretical positioning position based on the height difference and the laser model; defining the laser's descent speed based on the theoretical positioning position, the highest point, and the laser model; and if the laser cannot acquire a positioning signal at the theoretical positioning position, it performs phased reciprocating movements based on that position until the laser acquires the positioning signal. Local inspection is performed based on the location of the arrival signal to determine the focal position, including: acquiring the arrival signal and defining its location; triggering local inspection of the laser based on the location of the arrival signal; during the local inspection, the laser reciprocates up and down at the location of the arrival signal, and the laser's focus status is monitored; if the laser's focus status is in a preset focus state, the current position of the laser is fixed and defined as the focal position; if the laser is in the process of local inspection, the moving speed of the laser is acquired; the moving speed of the laser is less than the descending speed of the laser.

2. The focusing method of the laser engraving machine according to claim 1, characterized in that, The laser rapidly descends from its highest point and acquires a positioning signal, including: When the laser is at its highest point, the laser's autofocus logic is triggered. In the autofocus logic of the laser, the laser descends rapidly from its highest point, with the descent speed exceeding the ascent speed. Monitor the rapid descent of the laser and acquire the arrival signal; Record the location of the position signal.

3. The focusing method of the laser engraving machine according to claim 1, characterized in that, The focusing method of the laser engraving machine further includes: The laser rapidly descends from its highest point; Monitor the laser's descent process until it reaches its lowest point; During the process of the laser moving from the highest point to the lowest point, the positioning signal cannot be collected, and the number of times the laser cannot be detected is recorded. If the number of times the laser fails to detect exceeds the preset number, a fault check of the laser will be triggered.

4. A focusing system for a laser engraving machine, characterized in that, The focusing system of the laser engraving machine is applied to the focusing method of the laser engraving machine as described in any one of claims 1-3, and the focusing system of the laser engraving machine includes: The lifting module is used to raise the laser in the laser engraving machine to its highest position before the laser engraving machine engraves the workpiece. This includes: acquiring the current position of the laser in the laser engraving machine before engraving the workpiece; if the current position of the laser is not the highest position, triggering the laser to rise; during the laser's rise, the laser gradually rises at a variable speed until it reaches the highest position; and also includes: acquiring the distance between the current position and the highest position of the laser; defining the laser's rising parameters based on the distance between the current position and the highest position. The acquisition module is used to rapidly descend the laser from its highest point and acquire the positioning signal. The local inspection module is used to perform local inspection based on the location of the arrival signal to determine the focus position. This includes: acquiring the arrival signal and defining its location; triggering local inspection of the laser based on the arrival signal location; during local inspection, the laser reciprocates up and down at the arrival signal location, and the laser's focus status is monitored; if the laser's focus status is in a preset focus state, the current position of the laser is fixed and defined as the focus position; if the laser is in the local inspection process, the laser's moving speed is acquired; the laser's moving speed is less than its descending speed.

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