Multi-wavelength laser light source combined type galvanometer machining head

Abstract

The invention is suitable for the field of laser engraving and cutting, and provides a multi-wavelength laser light source combined type galvanometer machining head which comprises a hood and a lifting sliding table plate in the hood, an upper sliding table plate is fixed to the lifting sliding table plate, a mounting hole is formed in the center of the upper sliding table plate, a galvanometer set is arranged above the mounting hole, and a field lens is mounted in the mounting hole. An optical fiber coupler set, an optical fiber reflector set, a blue light reflector set, a red light reflector set and a blue light module set are further arranged on the upper sliding table plate. On one hand, three laser light sources are integrated, the light path positions of all parts are reasonably designed, it is ensured that high-precision focusing is kept when lasers of all wavelengths are switched, and the user experience and the working efficiency are remarkably improved. And on the other hand, through the design of the installation structure of the light source part, optical correction can be conducted on the light source of each wavelength, optical focuses of every three light sources coincide, and the carving and cutting precision and the machining efficiency are further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of commercial laser engraving and cutting, and in particular relates to a multi-wavelength laser light source composite galvanometer processing head. Background Art

[0002] In the field of commercial laser engraving and cutting technology, when users operate desktop laser engraving and cutting equipment, they need to use laser light sources of different wavelengths for laser engraving, cutting or demonstration. For example, use a 1064nm wavelength fiber laser to engrave and cut materials such as metals, plastics, and rocks; use a 450nm wavelength blue laser to engrave and cut materials such as wood, leather, and rubber; use a 650nm red laser to preview the trajectory before engraving or cutting, and determine in advance whether the processed graphics are within the material processable area. Users switch between these three light sources with different wavelengths to meet processing needs. Therefore, desktop laser engraving and cutting equipment is required to have a light source that emits no less than three different wavelengths, and at least three different wavelengths of lasers can be integrated in the equipment.

[0003] Currently, the common commercial desktop laser engraving and cutting equipment on the market is only equipped with one wavelength of laser, mainly standard fiber laser, and some are equipped with blue laser. Users need to switch between devices equipped with three different wavelengths to achieve engraving or cutting of different materials, and cannot use red laser to preview the engraving or cutting trajectory. This switching and operation method of different light sources seriously affects the user's operating experience and processing efficiency. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a multi-wavelength laser light source composite galvanometer processing head, aiming to solve the technical problems of the existing equipment in terms of complex light source switching and operation modes and low efficiency.

[0005] The present invention adopts the following technical solution:

[0006] The multi-wavelength laser light source composite galvanometer processing head comprises a machine cover and a lifting slide plate located in the machine cover, an upper slide plate is fixed on the lifting slide plate, a mounting hole is provided at the center of the upper slide plate, a galvanometer group is provided above the mounting hole, a field mirror is installed in the mounting hole, and a fiber coupler group, a fiber reflector group, a blue light reflector group, a red light reflector group and a blue light module group are also provided on the upper slide plate, wherein the fiber coupler group is located on one side of the galvanometer group, the fiber reflector group is located on the output light path of the fiber coupler group, the blue light reflector group is located on the reflection light path of the fiber reflector group and at the same time on the output light path of the blue light module group, the red light reflector group is located on the output light path of the blue light reflector group, and the output light path of the red light reflector group faces the galvanometer group.

[0007] Furthermore, a fixed-focus red light group is symmetrically arranged at the bottom of the lifting slide and on both sides of the field lens, and a visual component is arranged at the bottom of the lifting slide and on the rear side of the field lens.

[0008] Furthermore, the fiber optic coupler group includes a coupling head, an adjustment frame and a two-dimensional connecting foot. The four side frame positions of the adjustment frame are installed with hand screws. The tail of the coupling head is fixed between the ends of the hand screws. A connecting tube is installed on the two-dimensional connecting foot through a universal ball. The end of the coupling head is installed to the connecting tube. The connecting tube is also connected to a first collimating expander.

[0009] Furthermore, the fiber optic reflector group includes two fiber optic reflector modules, the fiber optic reflector module includes a fiber optic lens seat screwed on the upper sliding table, a fiber optic lens frame with a bevel is screwed on the fiber optic lens seat, a fiber optic reflector is installed on the bevel of the fiber optic lens frame, the two fiber optic reflectors are adjacent and vertically arranged, and the output light of the fiber optic coupler group is irradiated to the first fiber optic reflector at 45°.

[0010] Furthermore, the blue light reflector group includes a blue light lens seat, a long strip is provided at the bottom of the blue light lens seat, a blue light lens frame with an inclined surface is screwed onto the blue light lens seat, a first dichroic mirror is installed on the inclined surface of the blue light lens frame, and the blue light lens frame also has a circular hole, and the reflected light of the optical fiber reflector group passes through the circular hole and the output of the first dichroic mirror.

[0011] Furthermore, a rectangular opening is provided on the upper sliding plate, and the blue light module group includes a T-shaped radiator, which is locked into the rectangular opening in the form of a waist-shaped hole, a blue light laser is provided on the top of the T-shaped radiator, and a blue light fan is also installed on the rear side of the T-shaped radiator and the blue light laser and in the rectangular opening, and a second collimating beam expander is also installed at the output end of the blue light laser, and the second collimating beam expander is set at 45° toward the first dichroic mirror of the blue light reflector group.

[0012] Furthermore, the red light reflector group includes a base fixed on the upper sliding table, the top of the base is provided with a wedge opening downwardly, a second dichroic mirror is locked and fixed in the wedge opening, a through hole penetrating the wedge opening is provided on the front of the base, a red light fixing plate is fixed to the top of the base by a pushing screw and a locking screw, an isolation tube is provided at the center of the red light fixing plate, a first red light indicator is fixed in the isolation tube by a locking wire, and the first red light indicator is set at 45° toward the second dichroic mirror; wherein the pushing screw is screwed into the red light fixing plate and contacts the top surface of the base, and the locking screw passes through the red light fixing plate and is screwed into the base.

[0013] Furthermore, a pair of small holes are opened on the lifting slide plate, and the fixed-focus red light group includes a light mounting ball with a diameter larger than the small holes, and a column hole is provided in the light mounting ball, and a second red light indicator is locked in the column hole by a side nail. The fixed-focus red light group also includes a hole plate, and the center hole of the hole plate presses the bottom of the light mounting ball and locks it to the lifting slide plate.

[0014] Furthermore, a field lens adapter ring is threadedly connected to the mounting hole of the upper sliding platform, and the field lens is installed on the inner thread of the field lens adapter ring.

[0015] Furthermore, the lifting slide plate includes an integrally formed base plate and side plates located on both sides of the base plate, the front edge of the base plate has an arc-shaped avoidance opening, the bottom of the rear part of the base plate is integrally formed with cooling fins, the rear end of the base plate is located behind the cooling fins and a pair of cooling fans are provided, and the cooling fans are provided with connecting seats on both sides; the upper slide plate has top pins on both sides that contact the side plates, and the upper slide plate also has locking pins on both sides that are screwed into the side plates, and the locking pins are provided with compression springs.

[0016] The beneficial effects of the present invention are as follows: the processing head integrates three laser light sources, rationally designs the optical path positions of each part, ensures that each wavelength laser maintains high-precision focus when switching, and avoids the error caused by light source replacement in traditional equipment; and through the intelligent control system of the host, the light source output can be switched with one key, thereby achieving precise engraving and cutting of different materials, completely solving the cumbersome problem of multi-device operation, and significantly improving user experience and work efficiency. In addition, the present invention also provides the installation structure design of each light source part, which can realize optical correction of each wavelength of light source, make the optical focus of each of the three light sources coincide, ensure that the focus of each light source is consistent when switching, and further improve the accuracy of engraving and cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a stereoscopic diagram of a multi-wavelength laser light source composite galvanometer processing head provided by an embodiment of the present invention;

[0018] Figure 2 The internal structure of the multi-wavelength laser light source composite galvanometer processing head Figure 1 ;

[0019] Figure 3 The internal structure of the multi-wavelength laser light source composite galvanometer processing head Figure 2 ;

[0020] Figure 4 The internal structure of the multi-wavelength laser light source composite galvanometer processing head Figure 3 ;

[0021] Figure 5 is a structural diagram of a fiber coupler group;

[0022] Figure 6This is a perspective structural diagram of a fiber optic reflector assembly;

[0023] Figure 7 This is a structural diagram of the fiber optic reflector assembly from another perspective;

[0024] Figure 8 It is a structural diagram of the blue light reflector group;

[0025] Fig. 9 It is a structural diagram of the blue light module group;

[0026] Fig.10 It is the structural diagram of the red light reflector group;

[0027] Fig.11 It is an exploded view of the fiber optic reflector assembly;

[0028] Fig.12 This is an exploded view of the fixed-focus red light group. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below for illustration.

[0031] like Figure 1-4 As shown, the multi-wavelength laser light source composite galvanometer processing head provided in this embodiment includes a machine cover 1 and a lifting slide plate 2 located in the machine cover 1, an upper slide plate 3 is fixed on the lifting slide plate 2, a mounting hole is provided at the center position of the upper slide plate 3, a galvanometer group 4 is provided above the mounting hole, a field mirror 5 is installed in the mounting hole, and a fiber coupler group 6, a fiber reflector group 7, a blue light reflector group 8, a red light reflector group 9 and a blue light module group 10 are also provided on the upper slide plate 3, wherein the fiber coupler group 6 is located on one side of the galvanometer group 4, the fiber reflector group 7 is located in the output light path of the fiber coupler group 6, the blue light reflector group 10 is located in the reflection light path of the fiber reflector group 7, and at the same time in the output light path of the blue light module group 10, the red light reflector group 7 is located in the output light path of the blue light reflector group 8, and the output light path of the red light reflector group 9 is toward the galvanometer group 4. Furthermore, a field lens adapter ring 35 is threadedly connected to the mounting hole of the upper slide plate 3 , and the field lens adapter ring 35 has an internal thread for mounting the field lens 5 .

[0032] The hood includes a peripheral side cover, a top plate and a bottom panel, and a variety of multi-light source lasers are integrated inside. In the specific structure, there are a lifting slide plate and an upper slide plate inside, and each part is installed on the upper slide plate, and the lifting slide plate serves as a supporting part. As a specific structure, in the figure, the lifting slide plate 2 includes an integrally formed bottom plate and side plates 21 located on both sides of the bottom plate, and the front edge of the bottom plate has an arc-shaped avoidance opening 22 for avoiding the field mirror 5. The bottom of the rear part of the bottom plate is integrally formed with a heat dissipation fin 23, and the rear end of the bottom plate is located behind the heat dissipation fin 23 and is provided with a pair of heat dissipation fans 24. The control panel is above the heat dissipation fin 23, and the connection seat 25 is on both sides of the heat dissipation fan 24. The heat dissipation fan 24 can form a gas flow in the hood, which is convenient for the rapid dissipation of heat. There are top pins 31 on both sides of the upper slide plate 3 that contact the side plates 21, and there are locking pins 32 on both sides of the upper slide plate 3 that are screwed into the side plates. There are compression springs 33 on the locking pins 32 to prevent loosening. By using the ejector pins 31 of different lengths, the distance between the upper slide plate and the lifting slide plate can be controlled.

[0033] In the above structure, for the fiber coupler group, the circular laser beam emitted is reflected by the fiber reflector group, and then incident on the blue light reflector group, and then penetrates the blue light reflector group and the red light reflector group and then incident on the galvanometer group. The galvanometer group can perform precise position control according to the coordinate requirements of the pattern. After the beam is reflected by the X-axis and Y-axis of the galvanometer group, it is output through the field mirror, and then the target object located below can be engraved or cut. For the blue light module group, the rectangular beam emitted is reflected by the blue light reflector group, and then penetrates the blue light reflector group and the red light reflector group and then incident on the galvanometer group, and can also be precisely engraved and cut in the above manner. Control. For the red light reflector group, the red light with a wavelength of 650nm emitted is reflected and incident on the galvanometer group, and can also be precisely engraved and cut in the above manner. Therefore, the three wavelengths of light beams are in the same direction and concentric after being reflected by the red light reflector group. After the three wavelengths of light beams are reflected by the X-axis and Y-axis reflectors of the galvanometer group, the three light beams are focused to the focal plane through the field mirror focusing lens that supports the three wavelengths.

[0034] Therefore, this multi-light source composite galvanometer processing head integrates three different wavelength lasers (1064nm, 450nm, 650nm) in the desktop laser engraving and cutting equipment. After the light beams are corrected by various optical devices, they are reflected and refracted. Through the field lens that supports the transmission of three wavelengths, the field lens focuses the three wavelengths of light beams that are reflected and refracted, and finally converges at the working focus of the field lens. The focus of these three light sources overlaps, ensuring that the processing accuracy is not affected when switching different light sources. Users do not need to repeatedly adjust the equipment, which greatly simplifies the operation process and improves work efficiency.

[0035] In addition, for the distance focusing of the processing head, a fixed-focus red light group 11 is symmetrically arranged at the bottom of the lifting slide plate 2 and on both sides of the field lens 5, and a visual component 12 is arranged at the bottom of the lifting slide plate 2 and on the rear side of the field lens 5. The two groups of fixed-focus red light groups emit red light to illuminate the target object on the workbench. When the light spots illuminated by the two groups of fixed-focus red light groups on the target object coincide, it indicates that the focusing is successful. If they do not coincide, the processing height needs to be adjusted so that the light spots coincide. During operation, the visual component 12 monitors the light spot coincidence status of the fixed-focus red light group in real time, automatically calculates the focal length difference of the field lens according to the distance value of the light spots, and automatically calibrates the focal length to ensure the focusing accuracy and the field lens moving distance. d is the distance value of the light spot falling on the surface of the target material, and β is half of the angle of the red light beams emitted by the two fixed-focus red light groups. Therefore, through the above steps, the user experience can be greatly improved, which is suitable for a variety of material thicknesses and effectively guarantees the precision and stability of engraving and cutting.

[0036] Due to the manufacturing and installation errors of the laser itself, the light beam emitted from the laser is not a parallel beam, and the light beam has a certain divergence angle. After the three laser beams of different wavelengths are reflected, refracted and focused, the focal points are not in the same focal plane. How to achieve the same focal plane for the three laser beams after passing through the optical components of the corresponding optical paths is the key. This embodiment performs targeted structural design for each component.

[0037] The details are as follows:

[0038] like Figure 5 As shown, the fiber coupler group 6 includes a coupling head 61, an adjustment frame 62 and a two-dimensional connection foot 63. The four frame positions of the adjustment frame 63 are installed with hand screws 64. The tail of the coupling head 6 is fixed between the ends of the hand screws 64. A connecting tube 66 is installed on the two-dimensional connection foot 63 through a universal ball 65. The end of the coupling head 61 is installed to the connecting tube 66. The connecting tube 66 is also connected to a first collimating beam expander 67. The universal ball 65 is located in the ball socket of the side wall of the connecting tube 66. The universal ball 65 has a round rod. One end of the round rod has a threaded rod with a diameter smaller than the round rod. The threaded rod passes through the two-dimensional connection foot and is locked with a nut. In this way, the nut and the round rod are clamped and fixed to the two-dimensional connection foot, so the position of the universal ball is fixed. During installation, the hand screw 64 can limit the upper, lower, left and right positions of the tail end of the fiber coupling head 61. Therefore, the coupling head can be controlled to rotate around the two-dimensional connection foot through the four hand screws on the adjustment frame 63, thereby changing the incident angle of the light beam.

[0039] like Figure 6As shown, the fiber reflector group 7 includes two fiber reflector modules, and the fiber reflector module includes a fiber lens seat 71 screwed on the upper slide plate, and a fiber lens frame 72 with an inclined surface is screwed on the fiber lens seat 71, and a fiber reflector 73 is installed on the inclined surface of the fiber lens frame 72. The two fiber reflectors 73 are adjacent and vertically arranged, and the output light of the fiber coupler group is irradiated at 45° to the first fiber reflector, that is, the fiber reflector shown above. In addition, Figure 7 As shown, there is a long groove on the upper sliding plate, and a long block at the bottom of the fiber optic lens seat 71. The length of the long block is smaller than the long groove, and there is a waist hole at the bottom of the fiber optic lens seat 71, which can adjust the position of the fiber optic lens seat 71. Therefore, the left and right position of the fiber optic lens seat 71 can be adjusted without deflection. In addition, there are two screw mounting positions on the side of the fiber optic lens seat 71. The fiber optic lens holder 72 can be installed on different mounting positions, and the left and right position of the fiber optic reflector can be adjusted, and the pitch angle of the fiber optic reflector can also be adjusted. Therefore, by adjusting the fixing screws at the bottom and side of the fiber optic lens seat, the angle of the fiber optic reflector can be fine-tuned to change the incident angle of the reflected light beam, and then the fiber optic reflector module is also adjusted to ensure that the reflected light beam is accurately aligned with the blue light reflector group.

[0040] like Figure 8 As shown, the blue light reflector group 8 includes a blue light lens seat 81, a long strip 82 is provided at the bottom of the blue light lens seat 81, a blue light lens frame 83 with a bevel is screwed on the blue light lens seat 81, a first dichroic mirror 84 is installed on the bevel of the blue light lens frame 83, and the blue light lens frame 83 also has a circular hole 85, and the reflected light of the optical fiber reflector group penetrates the circular hole 85 and the first dichroic mirror 84. The installation method of the blue light lens seat is the same as that of the optical fiber lens seat, and the lens angle can be adjusted. The difference is that the blue light lens frame 83 also has a circular hole 85, which is used to avoid the reflected light of the optical fiber reflector group in front, and the reflected light can directly penetrate the first dichroic mirror 84. At the same time, the front of the first dichroic mirror 84 can also reflect the output light beam of the blue light module group 10. Therefore, after adjusting the incident angle of the output beam of the blue light module group 10, the reflection path of the blue light beam is precisely controlled by fine-tuning the lens angle of the blue light reflector group to make it coaxial with the reflected fiber laser beam.

[0041] like Fig. 9 As shown, for the specific structure of the blue light module group 10, combined with Figure 3As shown, a rectangular opening 34 is provided on the upper slide plate 3, and the blue light module group 10 includes a T-shaped radiator 101, which is locked into the rectangular opening 34 in the form of a waist-shaped hole, and a blue light laser 102 is provided on the top of the T-shaped radiator 101. A blue light fan 103 is also installed on the rear side of the T-shaped radiator 101 and the blue light laser 102 and located in the rectangular opening. A second collimating beam expander 104 is also installed at the output end of the blue light laser 102, and the second collimating beam expander 104 is set at 45° toward the first dichroic mirror of the blue light reflector group 8. In order to ensure that the blue light laser 102 and the blue light reflector group 8 are at the same height, and the T-shaped radiator is relatively large in size, so this structure opens a rectangular opening on the upper slide, installs the T-shaped radiator in the form of a lower layer, and there is enough space under the upper slide. In addition, the T-shaped radiator is also installed in the form of a waist-shaped hole, and the front and rear positions can also be fine-tuned. The T-shaped heat sink 101 is also screwed with top screws 105 on both sides, and the screwing depth can be adjusted. The bottom of the top screw contacts the upper slide plate 3. Therefore, the installation height of the T-shaped heat sink can be adjusted by the top screw and the fixing screws of the waist round hole, that is, the height adjustment of the blue laser. In addition, by rotating the second collimating beam expander on the blue light module group, the divergence angle of the blue light beam is accurately adjusted to coincide with the focus of the reflected fiber laser beam.

[0042] like Fig.10 , 11 As shown, the red light reflecting mirror group 9 includes a base 91 fixed on the upper sliding table 3, the top of the base 91 is provided with a wedge 92 downwardly, a second dichroic mirror 93 is locked and fixed in the wedge 92, the front of the base 91 is provided with a through hole 94 penetrating the wedge, a red light fixing plate 97 is fixed to the top of the base 91 by a pushing screw 95 and a locking screw 96, an isolation tube 98 is provided at the center of the red light fixing plate 97, a first red light indicator 910 is fixed in the isolation tube 98 by a locking wire 99, and the first red light indicator 910 is set at 45° toward the second dichroic mirror; wherein the pushing screw 95 is screwed into the red light fixing plate 97 and contacts the top surface of the base 94, and the locking screw 96 passes through the red light fixing plate 97 and is screwed into the base 91. The first red light indicator is installed in the isolation tube, and the whole is installed on the red light fixing plate. The isolation column and the first red light indicator are fixed by the locking wire on the side. The red light fixing plate is fixed on the base. The second dichroic mirror is installed in the wedge on the base. Two nylon screws in the wedge press the edge of the second dichroic mirror. The whole assembly is installed on the upper sliding table. On the one hand, by adjusting the push screw 95 and the locking screw 96 that fix the red light fixing plate, the height and even the small angle of the red light fixing plate 97 can be adjusted to ensure that the light beam of the first red light indicator is concentric with the blue light beam and the reflected light beam of the fiber laser. Before operation, first make the focus of the blue light beam coincide with the focus of the fiber laser beam in the aforementioned manner, and then adjust the focus of the light beam of the first light indicator to coincide with the two. The last three light beams can be incident on the galvanometer group in the same direction.

[0043] According to the above structure, the laser beam emitted by the fiber laser is magnified into a circular beam of a certain size through a coupling head and a first collimating beam expander with a fixed magnification. The circular beam is first reflected 90 degrees by the first fiber reflector module. After the reflected beam passes through the second fiber reflector module, the circular beam is reflected 90 degrees again. The reflected beam passes through the blue light reflector group. The circular beam passes through the first dichroic mirror with a reflection angle of 45 degrees installed on the blue light reflector group. The circular beam is refracted and passes through the first dichroic mirror. For the blue light module group, the rectangular beam emitted by it is reflected 90 degrees by the second dichroic mirror of the blue light reflector group. After the blue light laser beam and the fiber laser beam pass through the blue light reflector group, the two different wavelengths of the beam are in the same direction and concentric on the reflected light side of the first dichroic mirror. The two beams are refracted by the second dichroic mirror installed at 45 degrees on the red light reflector group. In addition, the red light with a wavelength of 650nm emitted by the red light indicator on the red light reflector group is reflected 90 degrees by the second dichroic mirror. At this time, the three wavelengths of light beams are in the same direction and concentric on the reflected light side of the dichroic mirror. After being reflected by the X-axis and Y-axis reflectors of the galvanometer, the three wavelengths of light beams are focused to the focal plane through the field lens focusing lens that supports the three wavelengths.

[0044] like Fig.12 As shown, a pair of small holes 111 are opened on the lifting slide plate 2, and the fixed-focus red light group 11 includes a light mounting ball 112 with a diameter larger than the small hole, and a column hole is provided in the light mounting ball 112, and a second red light indicator 114 is locked in the column hole by a side nail 113, and the fixed-focus red light group 11 also includes a hole plate 115, and the center hole of the hole plate 115 presses the bottom of the light mounting ball 112 and is locked to the lifting slide plate 2. In this structure, the beam direction of the second red light indicator can be adjusted by adjusting the angle position of the light mounting ball and then locking it. After the above adjustment of the confocal point of the three light beams, the left and right groups of fixed-focus red light groups fixed on the lifting slide plate are finally adjusted to make the two red light spots completely overlap with the light spots of the fiber laser, red light, and blue light output by the scene. After adjusting the fixed-focus red light once, the focus of the three laser light sources does not need to be recalibrated. Therefore, this embodiment can ensure that the three light beams converge on the same focal plane after passing through the optical system by accurately adjusting the position and angle of each optical element, thereby achieving high-precision optical synthesis.

[0045] Therefore, in summary, through the above optical light path and structural design, the multi-light source composite galvanometer processing head performs well in complex material processing, and truly realizes efficient and accurate laser engraving and cutting. Through the design of the present invention, users can not only complete the processing tasks of multiple materials on a single device, but also enjoy more stable processing quality and more convenient operation experience.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-wavelength laser light source composite galvanometer processing head, characterized in that: The galvanometer processing head includes a machine cover and a lifting slide plate located in the machine cover, an upper slide plate is fixed on the lifting slide plate, a mounting hole is provided at the center of the upper slide plate, a galvanometer group is provided above the mounting hole, a field mirror is installed in the mounting hole, and a fiber coupler group, a fiber reflector group, a blue light reflector group, a red light reflector group and a blue light module group are also provided on the upper slide plate, wherein the fiber coupler group is located on one side of the galvanometer group, the fiber reflector group is located on the output light path of the fiber coupler group, the blue light reflector group is located on the reflection light path of the fiber reflector group and at the same time on the output light path of the blue light module group, the red light reflector group is located on the output light path of the blue light reflector group, and the output light path of the red light reflector group faces the galvanometer group.

2. The multi-wavelength laser light source composite galvanometer processing head as claimed in claim 1, characterized in that: A fixed-focus red light group is symmetrically arranged at the bottom of the lifting slide plate and located on both sides of the field lens, and a visual component is arranged at the bottom of the lifting slide plate and located at the rear side of the field lens.

3. The multi-wavelength laser light source composite galvanometer processing head as claimed in claim 2, characterized in that: The optical fiber coupler group includes a coupling head, an adjustment frame and a two-dimensional connecting foot. The four frame positions of the adjustment frame are installed with hand screws. The tail of the coupling head is fixed between the ends of the hand screws. A connecting tube is installed on the two-dimensional connecting foot through a universal ball. The end of the coupling head is installed to the connecting tube. The connecting tube is also connected to a first collimating beam expander.

4. The multi-wavelength laser light source composite galvanometer processing head as claimed in claim 3, characterized in that: The fiber optic reflector group includes two fiber optic reflector modules, and the fiber optic reflector module includes a fiber optic lens seat screwed onto an upper sliding platform, a fiber optic lens frame with an inclined surface screwed onto the fiber optic lens seat, and a fiber optic reflector is installed on the inclined surface of the fiber optic lens frame. The two fiber optic reflectors are adjacent and vertically arranged, and the output light of the fiber optic coupler group is irradiated to the first fiber optic reflector at 45°.

5. The multi-wavelength laser light source composite galvanometer processing head as claimed in claim 4, characterized in that: The blue light reflector group includes a blue light lens seat, a long strip is provided at the bottom of the blue light lens seat, a blue light lens frame with an inclined surface is screwed on the blue light lens seat, a first dichroic mirror is installed on the inclined surface of the blue light lens frame, and the blue light lens frame is also provided with a circular hole, and the reflected light of the optical fiber reflector group is emitted through the circular hole and the first dichroic mirror.

6. The multi-wavelength laser light source composite galvanometer processing head as claimed in claim 5, characterized in that: A rectangular opening is provided on the upper sliding plate, the blue light module group includes a T-shaped radiator, the T-shaped radiator is locked into the rectangular opening in the form of a waist-shaped hole, a blue light laser is provided on the top of the T-shaped radiator, a blue light fan is also installed on the rear side of the T-shaped radiator and the blue light laser and in the rectangular opening, and a second collimating beam expander is also installed at the output end of the blue light laser, and the second collimating beam expander is set at 45° toward the first dichroic mirror of the blue light reflector group.

7. The multi-wavelength laser light source composite galvanometer processing head as claimed in claim 6, characterized in that: The red light reflector group includes a base fixed on the upper sliding table, a wedge opening is opened downward on the top of the base, a second dichroic mirror is locked and fixed in the wedge opening, a through hole penetrating the wedge opening is opened on the front of the base, a red light fixing plate is fixed to the top of the base by a pushing screw and a locking screw, an isolation tube is provided at the center of the red light fixing plate, a first red light indicator is fixed in the isolation tube by a locking wire, and the first red light indicator is set at 45° toward the second dichroic mirror; the pushing screw is screwed into the red light fixing plate and contacts the top surface of the base, and the locking screw passes through the red light fixing plate and is screwed into the base.

8. The multi-wavelength laser light source composite galvanometer processing head as claimed in claim 7, characterized in that: A pair of small holes are opened on the lifting slide plate, and the fixed-focus red light group includes a light mounting ball with a diameter larger than the small holes, and a column hole is arranged in the light mounting ball, and a second red light indicator is locked in the column hole by a side nail, and the fixed-focus red light group also includes a hole plate, and the center hole of the hole plate presses the bottom of the light mounting ball and locks it to the lifting slide plate.

9. The multi-wavelength laser light source composite galvanometer processing head as claimed in claim 8, characterized in that: The mounting hole of the upper sliding platform is threadedly connected with a field lens adapter ring, and the field lens is installed on the inner thread of the field lens adapter ring.

10. The multi-wavelength laser light source composite galvanometer processing head according to any one of claims 1 to 9, characterized in that: The lifting slide plate includes an integrally formed bottom plate and side plates located on both sides of the bottom plate, the front edge of the bottom plate has an arc-shaped avoidance opening, the bottom of the rear part of the bottom plate is integrally formed with cooling fins, the rear end of the bottom plate is located behind the cooling fins and a pair of cooling fans are provided, and there are connecting seats on both sides of the cooling fan; there are top pins on both sides of the upper slide plate that contact the side plates, and there are locking pins on both sides of the upper slide plate that are screwed into the side plates, and there are compression springs on the locking pins.

Images