Laser galvanometer integrated with marking quality detection function

Abstract

The utility model provides a kind of integrated laser galvanometer of marking quality detection function, belong to laser marking technical field, including shell body, first reflector, second reflector and field lens;The inside of shell body is equipped with first galvanometer motor, second galvanometer motor and marking quality detection module, first reflector is installed on first galvanometer motor, second reflector is installed on second galvanometer motor;The side of shell body is equipped with light inlet, power signal interface and detection module interface, the bottom of shell body is equipped with mounting screw hole, and field lens is connected by mounting screw hole, field lens ring;The inner wall of mounting screw hole is provided with boss, light hole is provided on boss, and light hole is connected with marking quality detection module by light path element.The utility model integrates marking quality detection function, realizes real-time monitoring and abnormal early warning, improves detection precision and production efficiency, reduces cost and risk of badness, adapts to automation production demand.

Description

Technical Field

[0001] This utility model relates to the field of laser marking technology, and in particular to a laser galvanometer that integrates marking quality detection function. Background Technology

[0002] As the core execution component of laser marking equipment, the laser galvanometer is widely used in the laser marking of industrial products such as automotive parts and electronic components. Its working principle is to control the deflection angle of the internal mirror of the galvanometer to guide the high-energy pulsed laser emitted by the laser, which is then focused by the field lens and applied to the surface of the workpiece to be marked, causing the surface material of the workpiece to melt or vaporize instantly, forming a permanent mark. It is the core technology for realizing automated and high-precision marking production.

[0003] Currently, traditional laser galvanometers only have the single function of performing marking actions, lacking the ability to monitor the quality of the marking process and results. They operate in a "blind" state, easily leading to marking defects such as missing characters, incomplete QR code filling, and uneven marking depth. In this mode, marking quality inspection relies on manual visual inspection or post-marking inspection using an external machine vision system. Manual inspection is inefficient, easily influenced by subjective judgment, and difficult to adapt to the high-speed production demands of automated production lines. External machine vision inspection requires specialized image processing software, auxiliary light sources, and installation structures, resulting in high costs for hardware and software procurement, debugging, and subsequent maintenance. It also has strict requirements for installation space and is susceptible to interference from factors such as vibration, oil stains, and changes in lighting in the production environment, making it unstable in some harsh working conditions. More importantly, post-marking inspection cannot detect anomalies in real time. If problems such as laser malfunction, sudden power drop, marking focus shift, or foreign object obstruction occur, a large number of defective products can easily be generated and transferred to subsequent processes, causing serious production losses.

[0004] In the prior art, Chinese utility model patent with authorization announcement number CN207343961U discloses an intelligent laser scanning galvanometer system and a laser marking device. The system sets a distance measuring module inside the support shell to detect the distance between the field lens and the object to be marked in real time, and feeds it back to the control system to automatically control the lifting platform to adjust the focal length, thus realizing automatic focusing of laser marking. At the same time, by setting a visual positioning module on the field lens ring integrally connected to the support shell, the system collects the position image of the object to be marked and feeds it back to the control system, thus realizing the precise positioning of the object.

[0005] While the aforementioned existing technologies possess real-time detection capabilities, improving the automation and positioning accuracy of the marking process and enhancing product quality to some extent, they still have the following shortcomings in practical use: The core design of the system primarily focuses on "improving marking positioning accuracy and focusing efficiency," lacking both a structure for acquiring "marking quality signals" and a functional module for analyzing marking quality. The ranging module can only provide distance information to adjust the focus, and the visual positioning module can only identify the object's position to assist in positioning; neither can monitor key quality indicators such as the laser's light output status, the completeness of the marking content, and the consistency of marking depth. Therefore, the system still suffers from the inherent limitation of "blind marking," failing to detect issues in real time, leading to the flow of defective products and high risks of batch defects, making it difficult to meet the stringent requirements of "high quality and high efficiency" for automated production lines in industries such as automotive parts. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the inability to monitor key quality indicators of lasers and the high product defect rate, and to provide a laser galvanometer with integrated marking quality detection function.

[0007] This utility model is achieved through the following technical solution: a laser galvanometer integrating marking quality detection function, comprising a housing body, a first reflecting mirror, a second reflecting mirror, and a field mirror; the housing body internally houses a first galvanometer motor, a second galvanometer motor, and a marking quality detection module, the first reflecting mirror being mounted on the first galvanometer motor, and the second reflecting mirror being mounted on the second galvanometer motor; the side of the housing body is provided with a light inlet, a power signal interface, and a detection module interface, the light inlet corresponding to the first reflecting mirror, and the power signal interface connecting to the first galvanometer motor and the second galvanometer motor via a control card. The mirror is electrically connected to the electro-optical system, and the detection module interface is electrically connected to the marking quality detection module. The bottom of the housing body is provided with mounting screw holes corresponding to the first and second reflectors, and the housing body is connected to a field lens ring through the mounting screw holes. The field lens is mounted on the field lens ring. A boss located on one side of the second reflector is provided on the inner wall of the mounting screw holes. A light-collecting hole is provided on the boss. The light-collecting hole is connected to the marking quality detection module through an optical path element. One end of the optical path element is inserted into the light-collecting hole, and the other end of the optical path element is electrically connected to the marking quality detection module.

[0008] In operation, the laser beam emitted by the external laser enters the first reflecting mirror through the light inlet on the side of the housing. The first galvanometer motor drives the first reflecting mirror to deflect the laser to the second reflecting mirror. The second galvanometer motor drives the second reflecting mirror to deflect further, so that the laser is focused onto the surface of the workpiece to be marked by the field lens at the mounting screw hole, completing the marking action. Simultaneously, the laser reflected from the workpiece surface returns through the field lens and is collected through the light-collecting hole on the inner wall of the mounting screw hole. It is then directionally transmitted by the optical path element to the marking quality detection module. The marking quality detection module analyzes the reflected laser signal to determine whether the marking quality is abnormal and feeds back to the upper system through the detection module interface. The power signal interface provides operating power and control signals to the galvanometer motor to ensure overall coordinated operation.

[0009] This laser galvanometer integrates a marking quality detection module within its housing. By utilizing a light-collecting aperture and optical path components, it acquires reflected laser signals in real time during the marking process, enabling online detection of marking quality. This solves the problem of delayed post-marking detection caused by the "blind marking" of traditional laser galvanometers, allowing for timely detection of defects such as missing strokes, incomplete filling, and abnormal power, thus preventing the generation of batches of defective products. The optical path components are directly connected to the light-collecting aperture and the detection module, reducing environmental interference and improving the stability of the detection signal. The power supply and detection interface are independently configured, reducing signal interference and ensuring detection accuracy.

[0010] A further improvement of this utility model is that the first reflector, the second reflector, and the boss are arranged sequentially along the radial direction of the mounting screw hole, and the second reflector is located at the center of the mounting screw hole, while the first reflector and the boss are located on both sides of the second reflector.

[0011] A further improvement of this utility model is that the shell body includes an upper shell and a lower shell, which are fastened together to form a closed space for accommodating internal components.

[0012] A further improvement of this utility model is that the upper housing and the lower housing are detachably connected by screws and screw holes.

[0013] A further improvement of this utility model is that the power signal interface and the detection module interface are arranged on the side of the upper housing.

[0014] A further improvement of this utility model is that the light inlet is arranged on the side of the lower housing, the side of the lower housing is provided with a mounting hole located outside the light inlet, and the lower housing is mounted on the optical path assembly by screws and mounting holes.

[0015] A further improvement of this utility model is that heat dissipation holes are provided on the side of the lower housing.

[0016] A further improvement of this utility model is that a module bracket is provided inside the shell body, and the marking quality detection module is installed on the module bracket.

[0017] As can be seen from the above technical solutions, the beneficial effects of this utility model are: 1. This laser galvanometer integrates a marking quality inspection module within its internal structure, and, in conjunction with a light-collecting aperture and optical path components, constructs a system for acquiring and transmitting reflected laser signals, fundamentally solving the technical pain point of "blind marking" in traditional laser galvanometers. Compared to external inspection equipment, the integrated design significantly shortens the signal transmission path, reduces the impact of interference factors such as vibration, oil contamination, and changes in lighting conditions on inspection, and improves the detection accuracy of key quality indicators such as laser emission status, marking content integrity, and marking depth consistency. Simultaneously, real-time inspection is performed concurrently with the marking process, allowing for immediate alarm signal feedback via the inspection module interface upon the occurrence of anomalies. This prevents defective products from being transferred to subsequent processes, reduces the risk of batch defects, and significantly improves the quality control level of the production line.

[0018] 2. This laser galvanometer achieves efficient compatibility between its detection functions and those of traditional galvanometers through optimized split-type layout of the housing, arrangement of optical components, and interface configuration. The detachable connection between the upper and lower housings facilitates the installation and maintenance of internal components. The rational arrangement of the bosses and reflectors ensures efficient acquisition of reflected laser light. Independent settings for the power signal interface and the detection module interface reduce signal interference, while the module bracket provides stable support for the detection module. This integrated detection function design eliminates the installation space and debugging costs of external detection equipment, reducing overall hardware costs and making it particularly suitable for the compact layout requirements of automated production lines.

[0019] 3. This laser galvanometer integrates marking and quality inspection, eliminating the need for additional manual inspection stations or external vision systems on the production line. This reduces the inspection time per product and improves production efficiency. Simultaneously, inspection data can be uploaded to the upper-level control system in real time via an interface, providing data support for production process analysis and optimization. This drives the upgrade of laser marking from "process execution" to "full-process quality control," contributing to intelligent and high-quality production in the manufacturing industry. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0022] Figure 2 This is a bottom view of a specific embodiment of the present utility model.

[0023] Figure 3 This is a schematic diagram of the structure of the lower shell, optical path components, and marking quality detection module in a specific embodiment of this utility model.

[0024] In the diagram: 1. Upper housing; 101. Detection module interface; 2. Lower housing; 201. Light inlet hole; 202. Mounting screw hole; 203. Heat dissipation hole; 204. Mounting hole; 3. First reflector; 301. First galvanometer motor; 4. Second reflector; 401. Second galvanometer motor; 5. Power signal interface; 6. Field lens ring; 7. Field lens; 8. Optical path components; 9. Marking quality detection module; 10. Module bracket; 11. Boss; 1101. Light-collecting hole. Detailed Implementation

[0025] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0026] Now refer to Figures 1-3The following is a description of a specific embodiment: The laser galvanometer with integrated marking quality detection function of this utility model includes a housing, a first reflecting mirror 3, a second reflecting mirror 4, and a field mirror 7. The housing contains a first galvanometer motor 301, a second galvanometer motor 401, and a marking quality detection module 9. The first reflecting mirror 3 is mounted on the first galvanometer motor 301, the second reflecting mirror 4 is mounted on the second galvanometer motor 401, and the marking quality detection module 9 is a FLIM series laser marking quality detection module. The side of the housing contains a light inlet 201, a power signal interface 5, and a detection module interface 101. The light inlet 201 corresponds to the first reflecting mirror 3, and the power signal interface 5 connects to the first reflecting mirror 3 via a control card. A galvanometer motor 301 and a second galvanometer motor 401 are electrically connected, and the detection module interface 101 is electrically connected to the marking quality detection module 9; the bottom of the housing body is provided with mounting screw holes 202 corresponding to the first reflector 3 and the second reflector 4, and the housing body is connected to a field lens ring 6 through the mounting screw holes 202, and the field lens 7 is mounted on the field lens ring 6; a boss 11 located on one side of the second reflector 4 is provided on the inner wall of the mounting screw holes 202, and a light-collecting hole 1101 is provided on the boss 11, the light-collecting hole 1101 is connected to the marking quality detection module 9 through an optical path element 8, one end of the optical path element 8 is inserted into the light-collecting hole 1101, and the other end of the optical path element 8 is electrically connected to the marking quality detection module 9.

[0027] In operation, the laser beam emitted by the external laser enters the first reflecting mirror 3 through the light inlet 201 on the side of the housing. The first galvanometer motor 301 drives the first reflecting mirror 3 to deflect the laser beam to the second reflecting mirror 4. The second galvanometer motor 401 drives the second reflecting mirror 4 to deflect further, so that the laser beam is focused onto the surface of the workpiece to be marked by the field lens 7 at the mounting screw hole 202, completing the marking action. At the same time, the laser beam reflected from the workpiece surface returns through the field lens 7 and is collected through the light-collecting hole 1101 on the inner wall boss 11 of the mounting screw hole 202. It is then directionally transmitted by the optical path element 8 to the marking quality detection module 9. The marking quality detection module 9 analyzes the reflected laser signal to determine whether the marking quality is abnormal and feeds back to the upper system through the detection module interface 101. The power signal interface 5 provides the working power and control signal to the galvanometer motor to ensure the overall coordinated operation.

[0028] This laser galvanometer integrates a marking quality detection module 9 within its housing. Utilizing a light-collecting aperture 1101 and optical path element 8, it acquires reflected laser signals during the marking process in real time, enabling online detection of marking quality. This solves the problem of delayed post-marking detection caused by the "blind marking" of traditional laser galvanometers, allowing for timely detection of defects such as missing strokes, incomplete filling, and abnormal power, thus preventing the generation of batches of defective products. The optical path element 8 directly connects the light-collecting aperture 1101 to the detection module, reducing environmental interference and improving the stability of the detection signal. Independent power supply and detection interface settings reduce signal interference and ensure detection accuracy.

[0029] Specifically, refer to Figure 2 The first reflector 3, the second reflector 4, and the boss 11 are arranged in sequence along the radial direction of the mounting screw hole 202, and the second reflector 4 is located at the center of the mounting screw hole 202, while the first reflector 3 and the boss 11 are located on both sides of the second reflector 4.

[0030] The first reflecting mirror 3, the second reflecting mirror 4, and the boss 11 are arranged radially along the mounting screw hole 202. The second reflecting mirror 4 is located at the center of the mounting screw hole 202, i.e., the extension line of the field mirror's optical axis. The first reflecting mirror 3 and the boss 11 are located on either side of the second reflecting mirror 4. This arrangement ensures that the incident laser, after being reflected by the first reflecting mirror 3, can accurately reach the second reflecting mirror 4 at the center position, and then be focused onto the workpiece by the field mirror 7. At the same time, when the laser reflected from the workpiece returns along the original path to the vicinity of the second reflecting mirror 4, it can be efficiently captured by the light-collecting hole 1101 of the side boss 11, reducing reflected light loss.

[0031] This laser galvanometer optimizes the arrangement of optical elements to ensure the accuracy of the incident laser path and improves marking positioning accuracy. At the same time, it places the light-collecting aperture 1101 near the path of strongest reflected light, improving the efficiency of reflected light collection, enhancing the signal strength of the marking quality detection module 9, and further improving detection accuracy.

[0032] Specifically, refer to Figure 1 The shell body includes an upper shell 1 and a lower shell 2, which are fastened together to form a closed space for accommodating internal components.

[0033] The shell body consists of an upper shell 1 and a lower shell 2 that are fastened together to form a closed space, which houses core components such as a first reflector 3, a second reflector 4, a galvanometer motor, and a marking quality inspection module 9. The closed structure can prevent external dust, moisture, and stray light from entering, avoiding contamination or interference to the internal optical components and electronic modules.

[0034] This laser galvanometer uses a split-type snap-fit ​​structure to ensure the sealed protection of internal components, reduce the impact of environmental factors on optical performance and electronic components, and extend the equipment life; it also provides a reasonable space layout for the integrated installation of internal components, meeting the compatibility assembly requirements of the marking quality inspection module 9 and traditional galvanometer components.

[0035] Specifically, refer to Figure 1 The upper housing 1 and the lower housing 2 are detachably connected by screws and screw holes.

[0036] The upper housing 1 and the lower housing 2 are fixed by a detachable connection of screws and screw holes. During assembly, the screws are tightened to achieve a seal, and the housings can be separated by loosening the screws during disassembly.

[0037] The aforementioned detachable connection facilitates the assembly, debugging, and subsequent maintenance of the equipment. When internal components need to be repaired or replaced, such as the marking quality inspection module 9 and the reflector, there is no need to damage the shell structure, which reduces the difficulty and cost of maintenance and improves the maintainability of the equipment.

[0038] Specifically, refer to Figure 1 The power signal interface 5 and the detection module interface 101 are arranged on the side of the upper housing 1; the light inlet 201 is arranged on the side of the lower housing 2, and the side of the lower housing 2 is provided with a mounting hole 204 located outside the light inlet 201, and the lower housing 2 is mounted on the optical path assembly by screws and mounting hole 204.

[0039] The power signal interface 5 and the detection module interface 101 are centrally located on the side of the upper housing 1, which facilitates the centralized connection and management of external power lines and data lines; the light inlet 201 is located on the side of the lower housing 2, and the lower housing 2 is fixed to the optical path assembly through the mounting hole 204, which shortens the optical path distance from the laser to the light inlet 201.

[0040] The centralized arrangement of interfaces reduces wire tangling and improves the neatness and safety of equipment wiring; the lower housing 2 is directly mounted on the optical path assembly, which shortens the laser transmission path, reduces laser energy loss and optical path offset, and improves marking accuracy; at the same time, the position matching of the light inlet hole 201 and the mounting hole 204 ensures the stability of the laser incident direction.

[0041] In one embodiment, reference Figure 3 The lower housing 2 has heat dissipation holes 203 on its side.

[0042] The heat dissipation hole 203 on the side of the lower housing 2 is connected to the internal space of the housing body, and the heat generated by the internal galvanometer motor and the electronic components of the marking quality detection module 9 is discharged to the external environment through air convection.

[0043] The laser galvanometer, through the design of the heat dissipation hole 203, can effectively reduce the internal temperature of the housing body, avoid problems such as reduced accuracy of the galvanometer motor drive and performance drift of electronic components in the detection module caused by high temperature, ensure the stability and reliability of the equipment during long-term continuous operation, and extend the service life of the core components.

[0044] In one embodiment, reference Figure 3 The shell body is provided with a module bracket 10 inside, and the marking quality inspection module 9 is installed on the module bracket 10.

[0045] The module bracket 10 is fixed inside the shell body. The marking quality detection module 9 is stably installed through the bracket to ensure that the connection end of the module with the optical path element 8 is fixed, so that the reflected laser signal can be stably transmitted to the signal acquisition end of the detection module.

[0046] The aforementioned module bracket 10 provides a stable installation foundation for the marking quality inspection module 9, preventing equipment vibration from causing the inspection module to shift position, ensuring the alignment accuracy between the optical path element 8 and the inspection module, reducing signal transmission loss and inspection errors, and improving the consistency and reliability of quality inspection.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser galvanometer integrating marking quality inspection function, comprising a shell body, a first reflecting mirror (3), a second reflecting mirror (4), and a field mirror (7), characterized in that, The shell body is internally equipped with a first galvanometer motor (301), a second galvanometer motor (401), and a marking quality detection module (9). The first reflector (3) is mounted on the first galvanometer motor (301), and the second reflector (4) is mounted on the second galvanometer motor (401). The side of the shell body is provided with a light inlet (201), a power signal interface (5), and a detection module interface (101). The light inlet (201) corresponds to the first reflector (3). The power signal interface (5) is electrically connected to the first galvanometer motor (301) and the second galvanometer motor (401) through a control card. The detection module interface (101) is electrically connected to the marking quality detection module (9). The bottom of the shell body is provided with mounting screw holes (202) corresponding to the first reflector (3) and the second reflector (4), and the shell body is connected to the field lens ring (6) through the mounting screw holes (202). The field lens (7) is mounted on the field lens ring (6). The inner wall of the mounting screw holes (202) is provided with a boss (11) located on one side of the second reflector (4). The boss (11) is provided with a light-collecting hole (1101). The light-collecting hole (1101) is connected to the marking quality detection module (9) through an optical path element (8). One end of the optical path element (8) is inserted into the light-collecting hole (1101), and the other end of the optical path element (8) is electrically connected to the marking quality detection module (9).

2. The laser galvanometer with integrated marking quality detection function according to claim 1, characterized in that, The first reflector (3), the second reflector (4) and the boss (11) are arranged in sequence along the radial direction of the mounting screw hole (202), and the second reflector (4) is located at the center of the mounting screw hole (202). The first reflector (3) and the boss (11) are located on both sides of the second reflector (4).

3. The laser galvanometer with integrated marking quality inspection function according to claim 1, characterized in that, The shell body includes an upper shell (1) and a lower shell (2), the upper shell (1) and the lower shell (2) are engaged to form a closed space for accommodating internal components.

4. A laser galvanometer with integrated marking quality inspection function according to claim 3, characterized in that, The upper housing (1) and the lower housing (2) are detachably connected by screws and screw holes.

5. A laser galvanometer with integrated marking quality inspection function according to claim 3, characterized in that, The power signal interface (5) and the detection module interface (101) are located on the side of the upper housing (1).

6. A laser galvanometer with integrated marking quality inspection function according to claim 5, characterized in that, The light inlet (201) is arranged on the side of the lower housing (2). The side of the lower housing (2) is provided with a mounting hole (204) located outside the light inlet (201). The lower housing (2) is mounted on the optical path assembly by screws and mounting hole (204).

7. A laser galvanometer with integrated marking quality detection function according to claim 3, characterized in that, The lower housing (2) is provided with heat dissipation holes (203) on its side.

8. A laser galvanometer with integrated marking quality inspection function according to claim 1, characterized in that, The shell body is provided with a module bracket (10), and the marking quality detection module (9) is installed on the module bracket (10).

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