Laser engraving device

Abstract

The embodiment of the invention discloses a laser engraving device. The laser engraving device comprises a laser engraving mechanism and a laser engraving mechanism, the laser engraving mechanism comprises a laser light source, a laser shaping part and a laser marking part; the laser shaping piece is configured to adjust the laser beam emitted by the laser light source so that the laser beam entering the laser marking piece can have the preset light spot size, shape and light divergence angle. According to the laser marking device, the laser shaping piece is adopted to adjust the laser beam emitted by the laser light source, the spot size, the shape and the light divergence angle of the laser beam are adjusted, the laser marking device is suitable for laser marking of patterns with different shapes and outlines, and the laser micromachining quality and efficiency can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of laser application technology, and in particular to a laser marking device. Background Art

[0002] Laser marking technology is one of the largest application areas of laser processing. Laser marking can produce various texts, symbols, patterns, etc. In order to produce the corresponding shape, the laser beam for marking needs to be shaped accordingly. The shaping of the laser beam relies on the optical path design, that is, the irradiance and phase distribution of the incident beam are redistributed. The irradiance distribution determines the profile of the laser beam, and the phase determines the propagation characteristics of the output beam. Usually, the spatial distribution of the beam emitted by the laser is Gaussian, and in many laser systems, in order to improve the energy utilization of the laser, it is usually necessary to shape the Gaussian distribution or other non-uniform distribution beam into a uniform distribution to meet specific structural or application requirements.

[0003] At present, DOE (Diffractive Optical Elements) is widely used to shape laser spots, but most of them are concentrated on laser spots of conventional shapes such as round, square, and long strips. It is difficult to adapt to laser marking of complex shapes and patterns. In addition, different spot shapes have their own advantages and disadvantages when laser processing patterns of different shapes and contours. Figure 1 As shown in the figure, the dotted box is the range to be filled, and the regular shape is the spot. When a single spot is used for fine filling of microstructures, there is still the problem of insufficient filling or exceeding the designed filling edge, resulting in poor imaging. If a small spot is used for filling, multiple scanning processes are required, which increases the processing path and prolongs the production time. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a laser engraving device, in which the optical path structure can change the shape, size and angle of the light spot, and can significantly improve the quality and efficiency of laser micromachining.

[0005] Specifically, the present invention provides a laser marking device, the laser marking device comprising a laser marking mechanism;

[0006] The laser engraving mechanism includes a laser light source, a laser shaping part and a laser marking part;

[0007] The laser shaping component is configured to adjust the laser beam emitted by the laser light source so that the laser beam entering the laser marking component has a preset spot size, shape and light divergence angle.

[0008] The laser engraving device provided in the present application adopts a laser shaping component to adjust the laser beam emitted by a laser light source, and adjusts the spot size, morphology and light divergence angle of the laser beam. It is suitable for laser marking of patterns with different shapes and contours, and can significantly improve the quality and efficiency of laser micromachining.

[0009] In one embodiment of the above-mentioned laser marking device, the laser shaping element includes: a variable aperture diaphragm, a beam expander, a switchable DOE, and a DOE switching driver;

[0010] The variable aperture diaphragm is arranged on the irradiation path of the laser light source to adjust the spot size of the laser beam emitted by the laser light source;

[0011] The beam expander is arranged at one end of the variable aperture diaphragm outputting the laser beam, and expands the diameter of the parallel input laser beam;

[0012] The switchable DOE is arranged at one end of the beam expander output light, and shapes the laser beam adjusted by the beam expander to obtain the target spot morphology;

[0013] The driving end of the DOE switching driving member is matched with the switchable DOE to drive the switchable DOE to rotate and switch the DOE to provide a variable angle light spot.

[0014] The variable aperture diaphragm can realize the change of spot size, the beam expander optimizes the light divergence angle, the switchable DOE provides different spot shapes, and the DOE rotating motor provides a variable angle spot. The above system is combined with mechanical movement to realize scalable and rotatable special-shaped spot processing.

[0015] In one embodiment of the above-mentioned laser engraving device, the laser engraving device further comprises a frame and a reeling and unreeling mechanism;

[0016] The reeling and unreeling mechanism is installed on the frame, and the reeling and unreeling mechanism drives the substrate to be engraved to flow horizontally on the top surface of the frame. The laser engraving mechanism is arranged above the frame and emits a laser beam toward the substrate to be engraved, so as to engrave a pattern on the surface of the substrate to be engraved;

[0017] The unwinding and rewinding mechanism comprises a horizontally arranged unwinding roller, a rewinding roller, a first driver and a second driver;

[0018] The first driver is connected to the unwinding roller and drives the unwinding roller to rotate in a first direction, and the second driver is connected to the winding roller and drives the winding roller to rotate synchronously with the winding roller;

[0019] The unwinding roller and the winding roller are respectively installed at two ends of the frame, and the unwinding roller and the winding roller are parallel to each other.

[0020] The reeling and unreeling mechanism can drive the substrate to be engraved to flow stably and smoothly in the horizontal direction, and can smoothly adjust the running speed of the substrate to be engraved, so as to control the smoothness of laser marking on the substrate to be engraved.

[0021] In one embodiment of the above-mentioned laser marking device, the laser marking device further comprises a driving mechanism and a visual tracking mechanism;

[0022] The visual tracking mechanism is arranged above the frame and faces the substrate to be engraved, and the visual tracking mechanism is fixedly connected to the laser engraving mechanism;

[0023] The driving mechanism is fixedly connected to the laser engraving mechanism or the visual tracking mechanism to drive the laser engraving mechanism and the visual tracking mechanism to move horizontally along the horizontal flow direction of the substrate to be engraved at the same time;

[0024] The device also includes a control mechanism, which is respectively connected to the reeling and winding mechanism, the laser engraving mechanism, the visual tracking mechanism and the driving mechanism by signal.

[0025] By fixing the visual tracking mechanism on the laser engraving mechanism, the driving mechanism drives the laser engraving mechanism and the visual tracking mechanism to flow synchronously with the substrate to be engraved, and the visual tracking mechanism can take a picture and track the engraved mark on the surface of the substrate to be engraved. After receiving the picture feedback from the visual tracking mechanism, the control system identifies and tracks the engraved mark on the surface of the substrate to be engraved, and controls the driving mechanism to drive the laser engraving mechanism to the corresponding position for the next step of laser engraving, thereby realizing laser engraving at a precise position and avoiding the problem of insufficient filling or exceeding the designed filling edge when the microstructure is finely filled due to the deviation of the engraving position.

[0026] In one embodiment of the above-mentioned laser marking device, there are at least two of the laser marking mechanisms and the visual tracking mechanisms, and each of the laser marking mechanisms is connected to at least one of the visual tracking mechanisms.

[0027] Each laser marking mechanism is equipped with a corresponding visual tracking mechanism, which is more accurate in tracking the marking.

[0028] Furthermore, the laser engraving device also includes a support member and a third driver;

[0029] The support member is vertically arranged, the laser engraving mechanism is fixed to the top of the support member, the third driver is installed on the frame, and the third driver is connected to the support member and drives the support member to translate;

[0030] The visual tracking mechanism connected to the laser engraving mechanism is fixed to the top end of the supporting member.

[0031] Furthermore, the support member includes a vertically arranged first support portion and a horizontally arranged second support portion, the second support portion is arranged above the top surface of the frame, the second support portion is parallel to the substrate to be engraved and perpendicular to the flow direction of the substrate to be engraved, the laser engraving mechanism and the visual tracking mechanism are both installed on the second support portion, and the laser emitted by the laser engraving mechanism is perpendicular to the engraving surface of the substrate to be engraved.

[0032] Furthermore, the visual tracking mechanism and the laser emitting element are both detachably connected to the supporting element, so that the distance between the visual tracking mechanism and the laser engraving mechanism can be adjusted so that the control system can set time compensation when the flow of the substrate to be engraved is accelerated or decelerated.

[0033] In one embodiment of the above-mentioned laser engraving device, the device also includes a cleaning and slitting mechanism located at the end of the flow direction of the substrate to be engraved, and the cleaning and slitting mechanism is installed at the end of the frame and located above the substrate to be engraved; it is convenient to clean and slitting the substrate to be engraved after P3 engraving is completed.

[0034] Furthermore, the edge cleaning and cutting mechanism includes a laser galvanometer, and at least two focusing heads are installed inside the laser galvanometer, and the distance between the focusing heads can be adjusted; it is convenient to adjust the edge cleaning and cutting distance setting of the laser galvanometer to adapt to the substrate to be engraved with different edge cleaning and cutting size requirements.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In addition, similar numbers in the figures are used to represent similar components, among which:

[0037] Figure 1 It is a schematic diagram of the engraving effect of different laser spots in the prior art;

[0038] Figure 2 It is a schematic diagram of the composition of the laser shaping component in the laser engraving device provided in an embodiment of the present invention;

[0039] Figure 3 is a schematic structural diagram of a laser marking device provided in an embodiment of the present invention;

[0040] Figure 4 is a schematic side view of the structure of a laser marking device provided by an embodiment of the present invention;

[0041] Figure 5 It is a schematic diagram of the effect of using a single spot before and after the laser shaping part and a single spot to process a ring;

[0042] Figure 6 A comparison diagram of the marking effect of the laser marking device provided by an embodiment of the present invention on a substrate to be marked and the marking effect of the substrate to be marked without using the laser marking device.

[0043] Description of Reference Numerals

[0044] Among them: 1. Laser engraving mechanism; 11. Laser shaping part; 111. Variable aperture diaphragm; 112. Beam expander; 113. Switchable DOE; 114. DOE switching driver; 12. Laser marking part; 2. Unwinding and rewinding mechanism; 21. Unwinding roller; 22. Rewinding roller; 3. Substrate to be engraved; 4. Visual tracking mechanism; 5. Edge cleaning and slitting mechanism. DETAILED DESCRIPTION

[0045] Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0046] As mentioned in the background technology, laser spots of conventional shapes such as circular, square, and long strips are commonly used for laser engraving, which are difficult to adapt to the engraving of complex shapes and patterns. When a single spot is used for fine filling of microstructures, there are still problems such as insufficient filling or exceeding the designed filling edge, resulting in poor imaging. If a small spot is used for filling, there are problems such as multiple scanning processes, increased processing paths, and longer production time.

[0047] In order to solve the above problems, the present invention provides a laser engraving device, which adopts a laser shaping part to adjust the laser beam emitted by a laser light source, and adjusts the spot size, morphology and light divergence angle of the laser beam. It is suitable for laser marking of patterns with different shapes and contours, and can significantly improve the quality and efficiency of laser micromachining.

[0048] The present invention will be described in detail below through specific embodiments.

[0049] Embodiment: This embodiment provides a laser engraving device, referring to Figures 2 to 4 As shown, the laser engraving device includes a laser engraving mechanism 1; the laser engraving mechanism 1 includes a laser light source, a laser shaping member 11 and a laser marking member 12;

[0050] The laser shaping element 11 is configured to adjust the laser beam emitted by the laser light source so that the laser beam entering the laser marking element 12 has a preset spot size, shape and light divergence angle.

[0051] The laser engraving device provided in the present application adopts a laser shaping element 11 to adjust the laser beam emitted by a laser light source, and adjusts the spot size, morphology and light divergence angle of the laser beam. It is suitable for laser marking of patterns with different shapes and contours, and can significantly improve the quality and efficiency of laser micromachining.

[0052] In some embodiments, the laser shaping element 11 includes: a variable aperture stop 111 , a beam expander 112 , a switchable DOE 113 , and a DOE switching driver 114 .

[0053] The variable aperture diaphragm 111 is arranged on the irradiation path of the laser light source to adjust the spot size of the laser beam emitted by the laser light source;

[0054] The beam expander 112 is disposed at one end of the variable aperture diaphragm 111 outputting the laser beam, and expands the diameter of the parallel input laser beam;

[0055] The switchable DOE 113 is disposed at one end of the beam expander 112 outputting the light, and shapes the laser beam adjusted by the beam expander 112 to obtain the target spot shape;

[0056] The driving end of the DOE switching driving member 114 is connected to the switchable DOE 113 to drive the switchable DOE 113 to rotate and switch the DOE to provide a variable angle light spot.

[0057] The variable aperture diaphragm 111 realizes the change of the spot size, the beam expander 112 optimizes the light divergence angle, the switchable DOE 113 provides different spot shapes, and the DOE switching driver 114 provides a variable angle spot. The above system is combined with mechanical movement to realize the processing of scalable and rotating special-shaped spots. The DOE switching driver 114 can be any device or component such as a rotary motor or a cylinder that can drive the switchable DOE to rotate to change the angle spot.

[0058] Exemplarily, the switchable DOE 24 includes a cylindrical base and 8 DOEs, and the 8 DOEs are embedded in the cylindrical base around the central axis of the cylindrical base. The distance between each DOE and the central axis of the cylindrical base is equal, and the spacing between the DOEs is also equal. The DOE switching drive 25 is a rotary motor, and the central axis of the cylindrical base coincides with the drive shaft of the rotary motor. The DOE is switched by driving the cylindrical base to rotate through the rotary motor. In addition, multiple DOEs can be arranged vertically on the base, and the DOE switching drive 25 uses a servo motor, and the servo motor drives the base to rise and fall to achieve the switching of the DOE.

[0059] In some embodiments, reference Figure 3 and Figure 4 As shown, the laser engraving device also includes a frame and a reeling and unreeling mechanism 2;

[0060] The reeling and unreeling mechanism 2 is installed on the frame, and drives the substrate 3 to be engraved to flow horizontally on the top surface of the frame. The laser engraving mechanism 1 is arranged above the frame and emits a laser beam toward the substrate 3 to be engraved, so as to engrave a pattern on the surface of the substrate 3 to be engraved.

[0061] The reeling and unreeling mechanism 2 drives the substrate 3 to be engraved to flow horizontally on the top surface of the frame;

[0062] The unwinding and rewinding mechanism 2 includes a horizontally arranged unwinding roller 21, a rewinding roller 22, a first driver (not shown) and a second driver (not shown);

[0063] The first driver is connected to the unwinding roller 21, driving the unwinding roller 21 to rotate in the first direction, and the second driver is connected to the winding roller 22, driving the winding roller 22 to rotate synchronously with the unwinding roller 21; the unwinding roller 21 and the winding roller 22 are respectively installed at the two ends of the frame, and the unwinding roller 21 and the winding roller 22 are parallel to each other; the unwinding roller 21 and the winding roller 22 rotate synchronously at the two ends of the frame, evenly open the substrate 3 to be engraved, drive the substrate 3 to be engraved to flow stably and smoothly in the horizontal direction, and can smoothly adjust the running speed of the substrate 3 to be engraved. Preferably, the winding roller 22 is slidably connected to the frame, and the height of the winding roller 22 on the frame is adjustable. During the winding process of the winding roller 22, its height is adjusted to ensure that the substrate 3 to be engraved is level.

[0064] The reeling and unreeling mechanism 2 can drive the substrate 3 to be engraved to flow stably and smoothly in the horizontal direction, and can smoothly adjust the running speed of the substrate 3 to be engraved, so as to control the smoothness of laser marking on the substrate 3 to be engraved.

[0065] In some embodiments, the laser engraving device further includes a driving mechanism and a visual tracking mechanism 4;

[0066] The visual tracking mechanism 4 is arranged above the frame and faces the substrate 3 to be engraved, and the visual tracking mechanism 4 is fixedly connected to the laser engraving mechanism 1;

[0067] The driving mechanism is fixedly connected to the laser engraving mechanism 1 or the visual tracking mechanism 4 to drive the laser engraving mechanism 1 and the visual tracking mechanism 4 to move horizontally along the horizontal flow direction of the substrate 3 to be engraved at the same time;

[0068] The device also includes a control mechanism, which is respectively connected to the reeling and winding mechanism 2, the laser engraving mechanism 1, the visual tracking mechanism 4 and the driving mechanism by signal.

[0069] By fixing the visual tracking mechanism 4 on the laser engraving mechanism 1, the driving mechanism drives the laser engraving mechanism 1 and the visual tracking mechanism 4 to flow synchronously with the substrate 3 to be engraved, and the visual tracking mechanism 4 can take pictures and track the engraved marks on the surface of the substrate 3 to be engraved. After receiving the picture feedback from the visual tracking mechanism 4, the control system identifies and tracks the engraved marks on the surface of the substrate 3 to be engraved, and controls the driving mechanism to drive the laser engraving mechanism 1 to the corresponding position for the next step of laser engraving, thereby realizing laser engraving at a precise position and avoiding the problem of insufficient filling or exceeding the designed filling edge when the microstructure is finely filled due to the deviation of the engraving position.

[0070] In some embodiments, there are at least two laser engraving mechanisms 1 and at least two visual tracking mechanisms 4, and each laser engraving mechanism 1 is connected to at least one visual tracking mechanism 4; each laser engraving mechanism 1 is equipped with a corresponding visual tracking mechanism 4, which makes tracking the engraving more accurate.

[0071] Furthermore, the laser engraving device also includes a support member and a third driver;

[0072] The support is arranged vertically, the laser engraving mechanism 1 is fixed to the top of the support, the third driver is installed on the frame, the third driver is connected to the support and drives the support to translate; the visual tracking mechanism 4 connected to the laser engraving mechanism 1 is fixed to the top of the support. Because the visual tracking mechanism 4 feeds back signals to the control system, and the control system also needs time to process the signals, during this process, the reeling and unreeling mechanism 2 drives the substrate to be engraved 3 to keep running, so it is necessary to drive the laser engraving mechanism 1 to move along the running direction of the substrate to be engraved 3 to compensate for the position distance.

[0073] Furthermore, the support member includes a vertically arranged first support portion and a horizontally arranged second support portion, the second support portion is arranged above the top surface of the frame, the second support portion is parallel to the substrate 3 to be engraved and perpendicular to the flow direction of the substrate 3 to be engraved, the laser engraving mechanism 1 and the visual tracking mechanism 4 are both installed on the second support portion, the laser emitted by the laser engraving mechanism 1 is perpendicular to the engraving surface of the substrate 3 to be engraved, and the engraving depth engraved on the surface of the substrate 3 to be engraved is uniform.

[0074] The laser marking mechanism 1 installed on each second support part has at least two laser marking parts 12, i.e., laser emission heads, and the distance between at least two laser emission heads and the substrate 3 to be engraved is equal; the at least two laser marking parts 12 installed on the second support part are arranged along the extension direction of the second support part; the multiple laser beams emitted by the laser marking mechanism 1 have the same distance to reach the substrate 3 to be engraved, and the engraving is more uniform.

[0075] Furthermore, the visual tracking mechanism 4 and the laser engraving mechanism 1 are both detachably connected to the support member, so that the distance between the visual tracking mechanism 4 and the laser engraving mechanism 1 can be adjusted so that the control system can set time compensation when the flow of the substrate 3 to be engraved is accelerated or decelerated.

[0076] In some embodiments, the laser engraving device also includes a cleaning and slitting mechanism 5 located at the end of the flow direction of the substrate 3 to be engraved. The cleaning and slitting mechanism 5 is installed at the end of the frame and located above the substrate 3 to be engraved; it is convenient to clean and slitting the substrate 3 to be engraved after the laser engraving pattern is completed.

[0077] The visual tracking mechanism 4 is a camera or any other device or structure that can clearly record the image on the surface of the substrate 3 to be engraved and convert the image into a signal to send to the control system.

[0078] Furthermore, the edge cleaning and slitting mechanism 5 includes a laser galvanometer, and at least two focusing heads are installed inside the laser galvanometer, and the distance between the focusing heads can be adjusted; it is convenient to adjust the edge cleaning and slitting distance setting of the laser galvanometer to adapt to the substrate 3 to be engraved with different edge cleaning and slitting size requirements.

[0079] Reference Figure 5 As shown in the figure, a single spot is used to process a ring. In Figure A, the single spot cannot change the processing direction; in Figure B, the single spot can change the spot angle, but cannot change the shape; in Figure C, the spot can change the processing angle and shape (overlap rate 0%); in Figure D, the spot can change the processing angle and shape (overlap rate 50%). It can be seen that when a single spot can change the processing angle and shape, its processing arc microstructure can better achieve the target contour processing.

[0080] Reference Figure 6 As shown, in the same volume 2400×1200m 2 When engraving on a thin film battery substrate, the dead zone of the laser engraving (without tracking) is enlarged without using the laser engraving device provided by this embodiment. The dead zone of the battery is the area where no power is generated. The enlarged dead zone leads to reduced battery efficiency or even failure. However, when the thin film battery engraving device provided by this embodiment is used to engrave the same roll of thin film battery substrate, the visual tracking mechanism in the device is used to assist in uniform engraving, consistent dead zones, reduced battery dead zones, and guaranteed battery efficiency.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A laser marking device, characterized in that: The laser engraving device comprises a laser engraving mechanism; The laser engraving mechanism includes a laser light source, a laser shaping part and a laser marking part; The laser shaping component is configured to adjust the laser beam emitted by the laser light source so that the laser beam entering the laser marking component has a preset spot size, shape and light divergence angle.

2. The laser marking device according to claim 1, characterized in that: The laser shaping component includes: a variable aperture diaphragm, a beam expander, a switchable DOE and a DOE switching driver; The variable aperture diaphragm is arranged on the irradiation path of the laser light source to adjust the spot size of the laser beam emitted by the laser light source; The beam expander is arranged at one end of the variable aperture diaphragm outputting the laser beam, and expands the diameter of the parallel input laser beam; The switchable DOE is arranged at one end of the beam expander output light, and shapes the laser beam adjusted by the beam expander to obtain the target spot morphology; The driving end of the DOE switching driving member is matched with the switchable DOE to drive the switchable DOE to rotate and switch the DOE to provide a variable angle light spot.

3. The laser marking device according to claim 1, characterized in that: The laser engraving device also includes a frame and a reeling and unreeling mechanism; The reeling and unreeling mechanism is installed on the frame, and the reeling and unreeling mechanism drives the substrate to be engraved to flow horizontally on the top surface of the frame. The laser engraving mechanism is arranged above the frame and emits a laser beam toward the substrate to be engraved, so as to engrave a pattern on the surface of the substrate to be engraved; The unwinding and rewinding mechanism comprises a horizontally arranged unwinding roller, a rewinding roller, a first driver and a second driver; The first driver is connected to the unwinding roller and drives the unwinding roller to rotate in a first direction, and the second driver is connected to the winding roller and drives the winding roller to rotate synchronously with the winding roller; The unwinding roller and the winding roller are respectively installed at two ends of the frame, and the unwinding roller and the winding roller are parallel to each other.

4. The laser marking device according to claim 3, characterized in that: The laser engraving device also includes a driving mechanism and a visual tracking mechanism; The visual tracking mechanism is arranged above the frame and faces the substrate to be engraved, and the visual tracking mechanism is fixedly connected to the laser engraving mechanism; The driving mechanism is fixedly connected to the laser engraving mechanism or the visual tracking mechanism to drive the laser engraving mechanism and the visual tracking mechanism to move horizontally along the horizontal flow direction of the substrate to be engraved at the same time; The device also includes a control mechanism, which is respectively connected to the reeling and winding mechanism, the laser engraving mechanism, the visual tracking mechanism and the driving mechanism by signal.

5. The laser marking device according to claim 4, characterized in that: There are at least two of the laser engraving mechanisms and the visual tracking mechanisms, and each of the laser engraving mechanisms is connected to at least one of the visual tracking mechanisms.

6. The laser marking device according to claim 4, characterized in that: The laser engraving device also includes a support member and a third driver; The support member is vertically arranged, the laser engraving mechanism is fixed to the top of the support member, the third driver is installed on the frame, and the third driver is connected to the support member and drives the support member to translate; The visual tracking mechanism connected to the laser engraving mechanism is fixed to the top end of the supporting member.

7. The laser marking device according to claim 6, characterized in that: The support member includes a vertically arranged first support portion and a horizontally arranged second support portion, wherein the second support portion is arranged above the top surface of the frame, the second support portion is parallel to the substrate to be engraved and perpendicular to the flow direction of the substrate to be engraved, the laser engraving mechanism and the visual tracking mechanism are both installed on the second support portion, and the laser emitted by the laser engraving mechanism is perpendicular to the engraving surface of the substrate to be engraved.

8. The laser marking device according to claim 6 or 7, characterized in that: The visual tracking mechanism and the laser engraving mechanism are both detachably connected to the supporting member.

9. The laser marking device according to any one of claims 3 to 7, characterized in that: The device also includes a margin cleaning and slitting mechanism located at the end of the substrate to be engraved in the flow direction. The margin cleaning and slitting mechanism is installed at the end of the frame and is located above the substrate to be engraved.

10. The laser marking device according to claim 9, characterized in that: The edge cleaning and cutting mechanism comprises a laser galvanometer, at least two focusing heads are installed inside the laser galvanometer, and the distance between the focusing heads can be adjusted.

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