Femtosecond laser colorful marking device

Abstract

The present invention relates to the field of laser marking technology, and in particular to a femtosecond laser colorful marking device. The present invention solves the technical problems that the existing laser marking machine can only mark black and white for marking objects, but lacks color marking on the surface of objects, the surface marking color of objects is single, the surface marking color of objects cannot be customized, the application range is narrow, and the marking accuracy is poor. The present invention adopts two femtosecond and nanosecond lasers, and through software optical shaping devices, full return mirrors and visual modules, variable energy distribution, light source switching and visual positioning are performed before the laser is focused, so as to change the state of the laser beam to realize the processing of the surface of the object. The processing effect is colorful and diverse, the color of the marking on the surface of the object can be customized, the processing effect is colorful and diverse, the marking is stable and flexible, the accuracy is high, two laser light sources are used to output in the same optical path, and the processing is controlled by software in sequence, and the laser colorful printing is performed on the surface of the object, which improves the process effect.

Description

Technical Field

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

[0002] Laser marking machine is a technology that uses laser beam to make permanent marks on the surface of materials. This technology uses laser to generate laser beam, which is then focused by optical lens after a series of optical transmission and processing, and then deflected to the specified position on the surface of the object to be processed; laser marking machine can mark various words, symbols and patterns, and has broad market application prospects.

[0003] However, existing laser marking machines can generally only mark objects in black and white, and are still very lacking in color marking on the surface of objects. The color of the marking on the surface of objects is single, and the color of the marking on the surface of objects cannot be customized. The application range is narrow and the marking accuracy is poor. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the existing laser marking machines, the present invention provides a femtosecond laser colorful marking device, which solves the technical problems that the existing laser marking machines can generally only mark objects in black and white, but are still very short of marking the surface of objects in color, the surface of objects has a single color, the surface of objects cannot be customized, the application range is narrow, and the marking accuracy is poor.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A femtosecond laser colorful marking device, comprising:

[0007] Lower cabinet,

[0008] A marble slab, the marble slab is arranged on the upper surface of the lower cabinet, support plates are arranged on both sides above the marble slab, and a marble platform is fixedly installed above the support plate;

[0009] An optical path system, the optical path system includes two parts: an external optical path of the laser and a placement device. The external optical path of the laser is arranged on a marble slab and a marble platform, and the placement device is arranged on the marble slab;

[0010] The laser external optical path includes:

[0011] A femtosecond laser, wherein a laser protective cover is disposed on the outer side of the femtosecond laser, the femtosecond laser is disposed on a marble plate, a light guide is disposed in connection with the femtosecond laser, a first full-return mirror is installed at the end of the light guide, a second full-return mirror is disposed corresponding to the first full-return mirror, an optical shaping device is disposed corresponding to the second full-return mirror, a femtosecond beam expander is disposed in front of the optical shaping device, an electric shifting stage for switching the laser light source is disposed in front of the femtosecond beam expander, a full-return mirror is disposed on the electric shifting stage, a nanosecond beam expander is further disposed on one side of the electric shifting stage, an optical isolator output head is disposed at a position opposite to the nanosecond beam expander, a control card for controlling the variable energy distribution of the optical shaping device is disposed on one side of the optical isolator output head, and the control card is electrically connected to an external controller through an A / D conversion card;

[0012] A nanosecond laser is arranged at the bottom of the lower cabinet and is connected to the optical isolation output head through an optical fiber.

[0013] Furthermore, the storage device comprises:

[0014] A cross slide, the cross slide is fixed on the marble plate by bolts,

[0015] The Z-axis lifting platform is fixed on the marble platform by bolts.

[0016] A laser scanning galvanometer is connected to the Z-axis lifting platform through a galvanometer mounting plate. A focusing lens is arranged at the bottom of the laser scanning galvanometer. A third full-return mirror for adjusting the laser light emitting direction is arranged on one side of the focusing lens. A light source is arranged below the third full-return mirror. A dust hood for collecting laser processing dust is also arranged at the position of the light source.

[0017] Furthermore, a visual module for coaxial visual positioning is provided above the third full-reflection mirror.

[0018] Furthermore, the vision module includes an optical lens and an industrial camera, and the vision positioning module is fixedly connected to the light source via a Z-axis lifting platform.

[0019] Furthermore, a red light input module is also provided on one side of the laser scanning galvanometer.

[0020] Furthermore, a light guide tube with an accordion cover is arranged on one side of the Z-axis lifting platform, the upper end of the light guide tube with the accordion cover is connected to the bottom plate of the Z-axis lifting platform, and the lower end is connected to the galvanometer mounting plate, and the upper and lower ends of the light guide tube with the accordion cover are respectively installed with full-return mirrors, the full-return mirror at the upper end of the light guide tube with the accordion cover is coaxially arranged with the femtosecond beam expander, and the full-return mirror at the lower end of the light guide tube with the accordion cover is arranged corresponding to the laser scanning galvanometer.

[0021] Furthermore, a cooling water tank and a smoke purifier are provided on the rear side of the lower cabinet; the cooling water tank is connected to the femtosecond laser, and the smoke purifier is connected to the dust hood.

[0022] Furthermore, the lower cabinet includes a box for installing an industrial computer and a laser power box, and a monitor bracket for installing a monitor, a keyboard, and a mouse. The monitor bracket is arranged on the right side wall of the lower cabinet. The monitor, keyboard, and mouse are connected to the industrial computer in the box. A plurality of ground feet are also arranged at the lower end of the lower cabinet.

[0023] Furthermore, the femtosecond laser colorful marking device also includes an upper protective cover, a lifting door assembly and an operation panel are provided on the front panel of the upper protective cover, and a three-color alarm is also provided on the top of the upper protective cover.

[0024] Furthermore, the lifting door assembly includes a manual door handle, a manual lifting door, a guide rail fixing seat, a guide rail bearing, a lifting door guide rail and a buffer pad, the lifting door guide rails are arranged on both sides of the manual lifting door, the guide rail bearings pass through the lifting door guide rails and are fixedly connected to the manual lifting door, and the buffer pad is arranged at the lower end of the lifting door guide rails.

[0025] The working method of the above-mentioned femtosecond laser colorful marking device comprises the following steps:

[0026] When femtosecond laser marking is adopted, the femtosecond laser emits a femtosecond laser, which is transmitted to the first full-return mirror through the light guide tube. The femtosecond laser is reflected by the first full-return mirror to the second full-return mirror, and then reflected by the second full-return mirror to the optical shaping device, and then transmitted to the femtosecond beam expander. At this time, the electric shifting stage is moved to a position that does not block the femtosecond beam expander. The femtosecond laser is emitted from the femtosecond beam expander and transmitted to the full-return mirror at the upper end of the light guide tube with an accordion cover. The full-return mirror reflects the femtosecond laser, changes the direction of the femtosecond laser beam to vertically downward, enters the light guide tube with an accordion cover, and then reflects by the full-return mirror at the lower end of the light guide tube with an accordion cover into the laser scanning galvanometer. The femtosecond laser output from the laser scanning galvanometer passes through the focusing lens and then is reflected by the third full-return mirror to vertically downward and acts on the surface of the object to be marked.

[0027] When nanosecond laser is used, the nanosecond laser set at the bottom of the lower cabinet transmits the nanosecond laser to the output head of the optical isolator through the optical fiber. The nanosecond laser enters the nanosecond beam expander through the optical isolator. At this time, the electric instrument stage is moved to a position coaxial with the femtosecond beam expander. The femtosecond laser is blocked at this time. The second nanosecond laser enters the total return mirror on the electric shift stage after being output through the nanosecond beam expander. It is reflected by the total return mirror on the electric shift stage and enters the total return mirror at the upper end of the light guide tube with an accordion cover. At this time, the total return mirror reflects the nanosecond laser and changes the direction of the nanosecond laser beam to vertically downward, enters the light guide tube with an accordion cover, and then reflects through the total return mirror at the lower end of the light guide tube with an accordion cover into the laser scanning galvanometer. The nanosecond laser output from the laser scanning galvanometer passes through the focusing lens and then is reflected by the third total return mirror to act vertically downward on the surface of the object to be marked.

[0028] The light from the coaxial visual positioning light source is reflected on the surface of the object to be marked and then enters the visual module for coaxial visual positioning through the third full-reflection mirror, so that the position of the light spot on the surface of the object to be marked can be adjusted by software controlling the visual module and the cross slide.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The femtosecond laser colorful marking device provided by the present invention adopts two lasers, a femtosecond laser and a nanosecond laser. Through software optical shaping devices, full return mirrors and visual modules, variable energy distribution, optical path switching and visual positioning are performed before the laser is focused, so as to change the state of the laser beam to realize the processing of the surface of the object. The processing effect is colorful and diverse, and the marking color of the object surface can be customized. The processing effect is colorful and diverse, the marking is stable and flexible, and the precision is high.

[0031] 2. The femtosecond laser colorful marking device provided by the present invention adopts two laser light sources to output on the same optical path, and processes in sequence through software control. The femtosecond laser optical path and the nanosecond laser optical path can be switched at any time according to needs. It is specially used for laser colorful printing on the surface of objects, which improves the process effect, can realize multiple processes at the same time, and has a wide range of applications.

[0032] 3. The femtosecond laser colorful marking device provided by the present invention has a simple structure, reduces labor and consumables costs, improves production efficiency, and has great application value. Compared with the laser printers currently on the market, its advantages are becoming increasingly prominent. It can be used in the production of appearance parts in industries such as coinage and jewelry, and can improve the manufacturing process, making it more beautiful, more energy-saving and environmentally friendly, and more cost-effective. It has broad development prospects for the femtosecond laser processing application industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of a femtosecond laser colorful marking device provided in an embodiment of the present invention Figure 1 ;

[0034] Figure 2 A schematic diagram of the structure of a femtosecond laser colorful marking device provided in an embodiment of the present invention Figure 2 ;

[0035] Figure 3 for Figure 1 A schematic diagram of the structure of the laser external optical path 61 of the femtosecond laser colorful marking device;

[0036] Figure 4 for Figure 1 Schematic diagram of the structure of the object placement device 62 of the femtosecond laser colorful marking device Figure 1 ;

[0037] Figure 5 for Figure 1 Schematic diagram of the structure of the object placement device 62 of the femtosecond laser colorful marking device Figure 2 ;

[0038] Figure 6 for Figure 1 A schematic diagram of the structure of the lower cabinet 1 of the femtosecond laser colorful marking device;

[0039] Figure 7 for Figure 1 A schematic diagram of the structure of the upper protective cover 2 of the femtosecond laser colorful marking device;

[0040] Figure 8 for Figure 7 Schematic diagram of the internal structure of the middle and upper protective cover;

[0041] 1-lower cabinet, 11-box, 12-monitor stand, 13-monitor, 14-keyboard, 15-mouse, 16-foot, 2-upper protective cover, 21-lift door assembly, 211-manual door handle, 212-manual lift door, 213-guide rail fixing seat, 214-guide rail bearing, 215-lift door guide rail, 216-buffer pad, 22-front panel, 23-three-color alarm, 24-operation panel, 3-marble slab, 4-marble platform, 41-support plate, 5-cross slide, 6-optical path system, 61-laser external optical path, 611-femtosecond laser, 6111-laser protective cover, 612-light guide tube, 6131-first full-return mirror, 6132-second full-return mirror, 614-optical shaping device, 615-femtosecond beam expander, 616-nanosecond beam expander, 617-optical isolator output head, 618-electric shifting stage, 619-control card, 62-storage device, 621-Z-axis lifting platform, 622-bellows cover, 623-galvanometer mounting plate, 624-focusing lens, 625-laser scanning galvanometer, 626-light source, 627-dust hood, 628-third full-return mirror, 629-visual module, 6291-optical lens, 6292-industrial camera, 7-cooling water tank, 8-smoke purifier. DETAILED DESCRIPTION

[0042] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0043] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "bottom", "inner", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In order to more clearly and in detail introduce the femtosecond laser colorful marking device provided by the embodiment of the present invention, it will be described below in conjunction with a specific embodiment.

[0046] Example 1

[0047] like Figure 1-5 As shown, the femtosecond laser colorful marking device provided in this embodiment includes:

[0048] Lower cabinet 1,

[0049] A marble slab 3, which can be used to place workpieces to be processed. The marble slab 3 is arranged on the upper surface of the lower cabinet 1, and support plates 41 are respectively arranged on both sides above the marble slab 3. A marble platform 4 is fixedly installed above the support plates 41;

[0050] The optical path system 6 includes two parts: a laser external optical path 61 and a placement device 62. The laser external optical path 61 is arranged on the marble slab 3 and the marble platform 4. The placement device 62 is arranged on the marble slab 3.

[0051] The laser external optical path 61 includes:

[0052] A femtosecond laser 611 is provided with a laser shield 6111 outside the femtosecond laser 611. The femtosecond laser 611 is provided on a marble slab 3. A light guide tube 612 is provided in connection with the femtosecond laser 611. A first full-return mirror 6131 is provided at the end of the light guide tube 612. A second full-return mirror 6132 is provided corresponding to the first full-return mirror 6131. ​​An optical shaping device 614 is provided corresponding to the second full-return mirror 6132. A femtosecond expansion device 614 is provided in front of the optical shaping device 614. A beam mirror 615, an electric shifting stage 618 for switching the laser light source is arranged in front of the femtosecond beam expander 615, a full return mirror is arranged on the electric shifting stage 618, a nanosecond beam expander 616 is arranged on one side of the electric shifting stage 618, an optical isolator output head 617 is arranged at a position opposite to the nanosecond beam expander 616, a control card 619 for controlling the variable energy distribution of the optical shaping device 614 is arranged on one side of the optical isolator output head 617, and the control card 619 is electrically connected to an external controller through an A / D conversion card;

[0053] Nanosecond laser, the nanosecond laser is arranged at the bottom of the lower cabinet 1, and the nanosecond laser is connected to the optical isolation output head 617 through an optical fiber.

[0054] In this embodiment, the storage device 62 includes:

[0055] A cross slide 5 is fixed on the marble slab 3 by bolts.

[0056] A Z-axis lifting platform 621, which is fixed on the marble platform 4 by bolts. In this embodiment, the Z-axis lifting platform 621 is used to adjust the focal position of the focusing lens;

[0057] A laser scanning galvanometer 625 is connected to a Z-axis lifting platform 621 via a galvanometer mounting plate 623. A focusing lens 624 is provided at the bottom of the laser scanning galvanometer 625. A third full-reflection mirror 628 for adjusting the laser light emitting direction is provided on one side of the focusing lens 624. A light source 626 for coaxial visual positioning is provided below the third full-reflection mirror 628. A dust hood 627 for collecting laser processing dust is also provided at the position of the light source 626.

[0058] A visual module 629 for coaxial visual positioning is provided above the third full-reflection mirror 628 .

[0059] A red light input module is also provided on one side of the laser scanning galvanometer 625, the visual module 629 includes an optical lens 6291 and an industrial camera 6292, and the visual positioning module is fixedly connected to the light source 626 via the Z-axis lifting platform 621. In this embodiment, the software controls the visual module 629 and the cross slide 5 to adjust the position of the spot of the laser external optical path 61 on the surface to be marked of the object, thereby improving the position accuracy of the laser marking.

[0060] A red light input module is also provided on one side of the laser scanning galvanometer 625. The upper end of the light guide tube with the accordion cover 622 is connected to the bottom plate of the Z-axis lifting platform 621, and the lower end is connected to the galvanometer mounting plate 623. The light guide tube with the accordion cover 622 in this embodiment is used for moisture-proof and dust-proof and for upward and downward expansion and contraction. The upper and lower ends of the light guide tube with the accordion cover 622 are respectively installed with full-return mirrors. The full-return mirror at the upper end of the light guide tube with the accordion cover 622 is coaxially arranged with the femtosecond beam expander 615, and the full-return mirror at the lower end of the light guide tube with the accordion cover 622 is arranged corresponding to the laser scanning galvanometer 625.

[0061] The working method of the femtosecond laser colorful marking device provided in this embodiment is specifically as follows: the femtosecond laser 611 emits a femtosecond laser, which is transmitted to the first full-return mirror 6131 through the light guide tube 612. The femtosecond laser is reflected by the first full-return mirror 6131 to the second full-return mirror 6132, and then reflected by the second full-return mirror 6132 to the optical shaping device 614, and then transmitted to the femtosecond beam expander 615. At this time, the electric moving stage 618 is moved to a position that does not block the femtosecond beam expander 615, and the femtosecond laser is transmitted from the femtosecond beam expander 615 to the optical shaping device 614. The beam from the beam mirror 615 is transmitted to the full-return mirror at the upper end of the light guide tube with the accordion cover 622. The full-return mirror reflects the femtosecond laser and changes the direction of the femtosecond laser beam to be vertically downward, entering the light guide tube with the accordion cover 622, and then reflected by the full-return mirror at the lower end of the light guide tube with the accordion cover 622 to enter the laser scanning galvanometer 625. The femtosecond laser output from the laser scanning galvanometer 625 passes through the focusing lens 624 and then through the third full-return mirror 628 to act vertically downward on the surface of the object to be marked.

[0062] When nanosecond laser is used, a nanosecond laser (not shown in the figure) arranged at the bottom of the lower cabinet 1 transmits the nanosecond laser to the optical isolator output head 617 through an optical fiber. The nanosecond laser enters the nanosecond beam expander 616 through the optical isolator. At this time, the electric stage 618 is moved to a position coaxial with the femtosecond beam expander 615. The femtosecond laser is blocked at this time. The nanosecond laser is output through the nanosecond beam expander 616 and enters the full return mirror on the electric stage 618. It is reflected by the full return mirror on the electric stage 618 and enters The nanosecond laser beam enters the full-return mirror at the upper end of the light guide tube with the accordion cover 622. At this time, the full-return mirror reflects the nanosecond laser beam, changes the direction of the nanosecond laser beam to vertically downward, enters the light guide tube with the accordion cover 622, and then is reflected by the full-return mirror at the lower end of the light guide tube with the accordion cover 622 to enter the laser scanning galvanometer 625. The nanosecond laser output from the laser scanning galvanometer 625 passes through the focusing lens 624 and then is reflected by the third full-return mirror 628 to vertically downward and acts on the surface of the object to be marked.

[0063] The light from the coaxial visual positioning light source 626 is reflected on the surface of the object to be marked and then enters the visual module 629 for coaxial visual positioning through the third full-reflection mirror 628. The visual module 629 includes an optical lens 6291 and an industrial camera 6292. The position of the light spot on the surface of the object to be marked can be adjusted by software control of the visual module 629 and the cross slide 5, thereby improving the position accuracy of laser marking.

[0064] The femtosecond laser colorful marking device provided in this embodiment adopts two lasers, a femtosecond laser and a nanosecond laser, and controls the optical shaping device, the full return mirror and the visual module through software. Before the laser is focused, variable energy distribution, light source switching and visual positioning are performed, so as to change the state of the laser beam to realize surface processing of the object. The processing effect is colorful and diverse, the marking is stable and flexible, and the precision is high. Two laser light sources are used to output on the same optical path, and the processing is controlled in sequence by software. Laser colorful printing is specially performed on the surface of the object, which improves the process effect, can realize multiple processes at the same time, and has a wide range of applications.

[0065] In this embodiment, the object to be processed is placed on the cross slide 5, and the surface to be marked on the object to be processed is facing the Z-axis lifting platform 621. The marking focal length is adjusted by adjusting the position of the laser scanning galvanometer 625 by adjusting the Z-axis lifting platform 621, so that the initial focus position is located on the surface to be marked. At the same time, a visual module 629 is used. The visual module 629 and the cross slide 5 are controlled by software to achieve the adjustment of the position of the laser spot on the surface to be marked of the object, thereby improving the position accuracy of the laser marking. At the same time, an optical shaping device 614 is also used. The optical shaping device 614 is adjusted by the control card 619 of the external controller, so that the laser performs variable energy distribution before being focused, thereby changing the quality of the laser beam and diversifying the processing color. In addition, the movement of the electric shifting stage 618 can achieve the effect of switching the femtosecond laser optical path or the nanosecond laser optical path, and the nanosecond laser light source can be used for frosting and other laser process processing.

[0066] like Figure 2 In this embodiment, a cooling water tank 7 and a smoke purifier 8 are further provided on the rear side of the lower cabinet 1. The cooling water tank 7 is connected to the femtosecond laser 611 through a pipeline to remove excess heat in the femtosecond laser 611 and keep the temperature of the femtosecond laser 611 stable. The smoke purifier 8 is connected to the dust hood 627 through a pipeline to remove dust around the focusing lens 624 and keep the mirror clean and pollution-free.

[0067] like Figure 6 As shown, the lower cabinet 1 in this embodiment includes a box body 11 for installing an industrial computer and a laser power box, and a display bracket 12 for installing a display 13, a keyboard 14, and a mouse 15. The display bracket 12 is arranged on the right side wall of the lower cabinet 1 to facilitate the operator to operate in a standing or sitting position. The display 13, keyboard 14, and mouse 15 are connected to the industrial computer in the box body 11 to control the operation of the equipment. A plurality of feet 16 are also arranged at the lower end of the lower cabinet 1, so that the lower cabinet 1 has a certain distance from the ground.

[0068] like Figure 7 As shown, the femtosecond laser colorful marking device in this embodiment also includes an upper protective cover 2, and a lifting door assembly 21 and an operation panel 24 are provided on the front panel 22 of the upper protective cover 2. A three-color alarm 23 is also provided on the top of the upper protective cover. The three-color alarm 23 indicates the operation, stop or fault status of the device through three different colors, so that the staff can monitor the working status of the device.

[0069] like Figure 8As shown, the lifting door assembly 21 in this embodiment includes a manual door handle 211, a manual lifting door 212, a guide rail fixing seat 213, a guide rail bearing 214, a lifting door guide rail 215 and a buffer pad 216. The lifting door guide rails 215 are arranged on both sides of the manual lifting door 212. The guide rail bearing 214 passes through the lifting door guide rails 215 and is fixedly connected to the manual lifting door 212. The buffer pad 216 is arranged at the lower end of the lifting door guide rail 215. The manual lifting door 212 moves up and down on the lifting door guide rail 215 to open and close the upper protective cover 2 so as to place and take out the workpiece to be processed. The buffer pad 216 reduces the noise of the manual lifting door 212 moving up and down.

[0070] The femtosecond laser colorful marking device provided in this embodiment has a simple structure and is specifically used for laser colorful marking on the surface of an object, which greatly improves the process effect, increases production efficiency, reduces manufacturing costs, and has great application value. Compared with the laser marking machines currently on the market, its advantages are becoming increasingly prominent, and it can be applied to various industries, such as coinage, jewelry and other appearance parts production equipment, which can improve the manufacturing process, make it more beautiful, more energy-saving and environmentally friendly, and improve cost performance. It has broad development prospects for the industry where femtosecond laser processing is applied.

Claims

1. A femtosecond laser colorful marking device, characterized in that: The femtosecond laser colorful marking device comprises: Lower cabinet (1), A marble slab (3), the marble slab (3) being arranged on the upper surface of the lower cabinet (1), support plates (41) being arranged on both sides above the marble slab (3), and a marble platform (4) being fixedly mounted above the support plates (41); An optical path system (6), the optical path system (6) comprising two parts: a laser external optical path (61) and a storage device (62), the laser external optical path (61) being arranged on a marble slab (3) and a marble platform (4), and the storage device (62) being arranged on the marble slab (3); The laser external optical path (61) comprises: A femtosecond laser (611), wherein a laser protective cover (6111) is arranged outside the femtosecond laser (611), wherein the femtosecond laser (611) is arranged on a marble slab (3), wherein a light guide tube (612) is arranged in connection with the femtosecond laser (611), wherein a first full-return mirror (6131) is installed at the end of the light guide tube (612), wherein a second full-return mirror (6132) is arranged corresponding to the first full-return mirror (6131), wherein an optical shaping device (614) is arranged corresponding to the second full-return mirror (6132), wherein a femtosecond laser (611) is arranged in front of the optical shaping device (614). A femtosecond beam expander (615), an electric shifting stage (618) for switching the laser light source is arranged in front of the femtosecond beam expander (615), a full return mirror is arranged on the electric shifting stage (618), a nanosecond beam expander (616) is arranged on one side of the electric shifting stage (618), an optical isolator output head (617) is arranged at a position opposite to the nanosecond beam expander (616), a control card (619) for controlling the variable energy distribution of the optical shaping device (614) is arranged on one side of the optical isolator output head (617), and the control card (619) is electrically connected to an external controller via an A / D conversion card; A nanosecond laser, the nanosecond laser being arranged at the bottom of the lower cabinet (1), the nanosecond laser being connected to the optical isolator output head (617) via an optical fiber; The storage device (62) comprises: A cross slide (5), wherein the cross slide (5) is fixed on the marble plate (3) by bolts. A Z-axis lifting platform (621) is fixed on the marble platform (4) by bolts. A laser scanning galvanometer (625), wherein the laser scanning galvanometer (625) is connected to a Z-axis lifting platform (621) via a galvanometer mounting plate (623); a focusing lens (624) is provided at the bottom of the laser scanning galvanometer (625); a third full-reflection mirror (628) for adjusting the laser light emission direction is provided on one side of the focusing lens (624); a light source (626) is provided below the third full-reflection mirror (628); and a dust hood (627) for collecting laser processing dust is also provided at the position of the light source (626); A visual module (629) for coaxial visual positioning is provided above the third full-reflection mirror (628); A light guide tube with an accordion cover (622) is arranged on one side of the Z-axis lifting platform (621); the upper end of the light guide tube with the accordion cover (622) is connected to the bottom plate of the Z-axis lifting platform (621), and the lower end is connected to the galvanometer mounting plate (623); the upper end and the lower end of the light guide tube with the accordion cover (622) are respectively installed with full-return mirrors; the full-return mirror at the upper end of the light guide tube with the accordion cover (622) is coaxially arranged with the femtosecond beam expander (615), and the full-return mirror at the lower end of the light guide tube with the accordion cover (622) is arranged corresponding to the laser scanning galvanometer (625); A cooling water tank (7) and a smoke purifier (8) are also provided on the rear side of the lower cabinet (1); the cooling water tank (7) is connected to the femtosecond laser (611), and the smoke purifier (8) is connected to the dust hood (627); The lower cabinet (1) comprises a box body (11) for mounting an industrial computer and a laser power supply box, and a display bracket (12) for mounting a display (13), a keyboard (14), and a mouse (15); the display bracket (12) is arranged on a right side wall of the lower cabinet (1); the display (13), the keyboard (14), and the mouse (15) are connected to the industrial computer in the box body (11); and a plurality of footrests (16) are also arranged at the lower end of the lower cabinet (1); The femtosecond laser colorful marking device also includes an upper protective cover (2), a front panel (22) of the upper protective cover (2) is provided with a lifting door assembly (21) and an operation panel (24), and a three-color alarm (23) is also provided on the top of the upper protective cover; The lifting door assembly (21) comprises a manual door handle (211), a manual lifting door (212), a guide rail fixing seat (213), a guide rail bearing (214), a lifting door guide rail (215) and a buffer pad (216); the lifting door guide rail (215) is arranged on both sides of the manual lifting door (212); the guide rail bearing (214) passes through the lifting door guide rail (215) and is fixedly connected to the manual lifting door (212); and the buffer pad (216) is arranged at the lower end of the lifting door guide rail (215).

2. The femtosecond laser colorful marking device according to claim 1, characterized in that: The visual module comprises an optical lens (6291) and an industrial camera (6292), and the visual module is fixedly connected to the light source (626) via a Z-axis lifting platform (621).

3. The femtosecond laser colorful marking device according to claim 1, characterized in that: A red light input module is also provided on one side of the laser scanning galvanometer (625).

4. A working method of the femtosecond laser colorful marking device as claimed in claim 1, characterized in that: Here are the steps: When femtosecond laser marking is adopted, the femtosecond laser (611) emits a femtosecond laser, which is transmitted to the first full-return mirror (6131) through the light guide tube (612), and the femtosecond laser is reflected by the first full-return mirror (6131) to the second full-return mirror (6132), and then reflected by the second full-return mirror (6132) to the optical shaping device (614), and then transmitted to the femtosecond beam expander (615). At this time, the electric moving stage (618) is moved to a position that does not block the femtosecond beam expander (615), and the femtosecond laser is transmitted from the femtosecond beam expander (615) to the optical shaping device (614). The femtosecond laser is emitted from the laser beam and transmitted to the full-return mirror at the upper end of the light guide tube with the accordion cover (622). The full-return mirror reflects the femtosecond laser and changes the direction of the femtosecond laser beam to be vertically downward, enters the light guide tube with the accordion cover (622), and then is reflected by the full-return mirror at the lower end of the light guide tube with the accordion cover (622) to enter the laser scanning galvanometer (625). The femtosecond laser output from the laser scanning galvanometer (625) passes through the focusing lens (624) and then is reflected by the third full-return mirror (628) to act vertically downward on the surface of the object to be marked. When a nanosecond laser is used, a nanosecond laser arranged at the bottom of the lower cabinet (1) transmits the nanosecond laser to the optical isolator output head (617) through an optical fiber, and the nanosecond laser enters the nanosecond beam expander (616) through the optical isolator. At this time, the electric shift stage (618) is moved to a position coaxial with the femtosecond beam expander (615), and the femtosecond laser is blocked at this time. After being output from the nanosecond beam expander (616), the nanosecond laser enters the full return mirror on the electric shift stage (618), and is reflected by the full return mirror on the electric shift stage (618) and enters the nanosecond beam expander (616). The full-reflection mirror at the upper end of the light guide tube of the accordion cover (622) reflects the nanosecond laser, changes the direction of the nanosecond laser beam to be vertically downward, enters the light guide tube with the accordion cover (622), and then is reflected by the full-reflection mirror at the lower end of the light guide tube with the accordion cover (622) to enter the laser scanning galvanometer (625). The nanosecond laser output from the laser scanning galvanometer (625) passes through the focusing lens (624) and then is reflected by the third full-reflection mirror (628) to act vertically downward on the surface of the object to be marked; Light from the coaxial visual positioning light source (626) is irradiated on the surface of the object to be marked and then reflected through the third full reflection mirror (628) to enter the visual module (629) for coaxial visual positioning, so that the position of the light spot on the surface of the object to be marked can be adjusted by software control of the visual module (629) and the cross slide (5).

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