A dual laser processing device

Abstract

The present invention relates to the technical field of laser processing, and particularly to a dual-laser processing device. It includes: a first laser emitter and a second laser emitter; it further includes: a laser engraving head, a rear mirror switching mechanism, an intermediate mirror switching mechanism, and a front mirror adjustment mechanism; the front mirror adjustment mechanism includes a first front mirror, a second front mirror, and a front adjustment mechanism; the intermediate mirror switching mechanism includes a first intermediate mirror, a second intermediate mirror, and an intermediate switching mechanism; the rear mirror switching mechanism includes a first rear mirror, a second rear mirror, and a rear switching mechanism. By setting the mirror switching mechanism, when different lasers are applied, the corresponding mirrors can be switched, effectively reducing the absorption loss of the laser and improving the laser utilization rate.

Description

Technical Field

[0001] The present invention relates to the technical field of laser processing, and particularly to a dual-laser processing device. Background Art

[0002] When lasers with different wavelengths are used for processing and cutting, their performance on workpieces of different materials is different. For example, lasers with longer wavelengths have better penetrability and better cutting performance on materials such as wood and leather, while lasers with shorter wavelengths are better absorbed by metals when cutting metals. To facilitate the cutting of a wider range of materials, many laser processing machines use two laser light sources, such as a carbon dioxide laser emitter and a fiber laser emitter. However, after using two laser light sources, there is a common light source reflection system through a beam combiner, that is, the two lasers are introduced into the light source reflection system through the beam combiner and projected onto the laser processing head.

[0003] When a reflector reflects a laser, it also absorbs the laser energy, and the same material has different absorption rates for lasers with different wavelengths. To reduce the absorption loss of dual-source lasers, a reflector material with relatively low absorption for both lasers is generally used. Even so, after multiple reflections, the loss of the laser is relatively large. Summary of the Invention

[0004] The purpose of the present invention is to provide a dual-laser processing device in view of the deficiencies of the prior art. The dual-laser processing device has a reflector switching mechanism, which can effectively reduce the absorption loss of the laser.

[0005] A dual-laser processing device includes:

[0006] A first laser emitter and a second laser emitter, which respectively emit a first laser and a second laser outward;

[0007] It further includes: a laser engraving head, a rear reflector switching mechanism, an intermediate reflector switching mechanism, and a front reflector adjustment mechanism;

[0008] The front reflector adjustment mechanism includes a first front reflector and a second front reflector respectively used to reflect the first laser and the second laser to the intermediate reflector switching mechanism, and a front adjustment mechanism used to adjust the position of the first front reflector;

[0009] The intermediate reflector switching mechanism includes a first intermediate reflector and a second intermediate reflector respectively used to reflect the first laser and the second laser to the rear reflector switching mechanism, and an intermediate switching mechanism used to switch the first intermediate reflector and the second intermediate reflector to the intermediate reflection position;

[0010] The rear mirror switching mechanism includes a first rear mirror and a second rear mirror respectively used for reflecting the first laser and the second laser to the laser engraving head, and a rear switching mechanism used for switching the first rear mirror and the second rear mirror into the rear reflection position.

[0011] Further, the front adjustment mechanism includes a linear mechanism for driving the first front mirror to move or a rotating mechanism for driving the first front mirror to rotate.

[0012] Further, the intermediate switching mechanism includes: an intermediate rotating disk, a rotating sleeve and a substrate. The intermediate rotating disk is provided with two installation positions arranged at intervals and is respectively used for connecting the first intermediate mirror and the second intermediate mirror; the substrate is provided with a shaft hole and is rotatably connected with an intermediate rotating shaft. The lower end of the rotating sleeve is open, the upper end of the rotating sleeve is fixedly connected with the intermediate rotating disk, the inner bottom surface of the rotating sleeve is provided with a shaft hole and is rotatably connected with the upper end of the intermediate rotating shaft. An elastic transmission member is connected between the rotating sleeve and the intermediate rotating shaft, and the intermediate rotating shaft drives the rotating sleeve to rotate through the elastic transmission member; the intermediate rotating disk is connected with a positioning module. When one of the first intermediate mirror and the second intermediate mirror is in the intermediate reflection position, the intermediate rotating disk is temporarily positioned by the positioning module, and the elastic transmission member is deformed.

[0013] Further, a plurality of inner convex blocks are arranged on the inner side surface of the rotating sleeve, a plurality of outer convex blocks are arranged on the side surface of the intermediate rotating shaft, and the elastic transmission member is connected between adjacent inner convex blocks and outer convex blocks.

[0014] Further, the positioning module includes a positioning sleeve. The lower end of the positioning sleeve is connected with the substrate, the upper end of the positioning sleeve is provided with a mounting hole, a positioning ball and a second elastic member for pushing the positioning ball outwards are arranged in the mounting hole. The upper end of the positioning ball abuts against the lower end surface of the intermediate rotating disk. Two positioning holes are arranged on the lower end surface of the intermediate rotating disk, and the two positioning holes are correspondingly arranged with the first intermediate mirror and the second intermediate mirror; when the first intermediate mirror is in the intermediate reflection position, the upper end of the positioning ball enters one of the positioning holes; when the second intermediate mirror is in the intermediate reflection position, the upper end of the positioning ball enters the other positioning hole.

[0015] Further, an intermediate wheel is connected to the lower end of the intermediate rotating shaft. The intermediate wheel is connected with the front adjustment mechanism through a transmission rope assembly. A third elastic member for assisting the intermediate wheel to reset is arranged between the intermediate wheel and the substrate; when the first intermediate mirror is in the intermediate reflection position, the elastic potential energy of the third elastic member is the smallest; when the second intermediate mirror is in the intermediate reflection position, the elastic potential energy of the third elastic member is the largest.

[0016] Further, the rear switching mechanism includes:

[0017] A rear rotating disk, the rear rotating disk is provided with two rotating arms, and the two rotating arms are respectively connected with the first rear mirror and the second rear mirror;

[0018] The rear substrate is vertically arranged; a shaft hole is provided at the upper end of the rear substrate and a rear rotating shaft is rotatably connected thereto. One end of the rear rotating shaft passes through the shaft hole and is connected to the rear rotating disk, and the lower end of the rear substrate is connected to the laser engraving head;

[0019] The intermediate shaft and the rear transmission shaft. The two ends of the intermediate shaft are respectively rotatably connected to the rear transmission shaft and the rear rotating shaft, and a rear elastic transmission member is connected between the rear transmission shaft and the rear rotating shaft;

[0020] The rear positioning unit is arranged on the rear substrate. The rear rotating disk is provided with two rear positioning holes for positioning with the positioning unit; when the first rear reflector or the second rear reflector is in the reflection position, the rear positioning unit is connected to the rear rotating disk through a corresponding rear positioning hole and prevents the rear rotating disk from rotating.

[0021] Further, an outer end of the rear rotating shaft is connected with a rear rotating wheel. The rear rotating wheel is connected with the front adjustment mechanism or the intermediate switching mechanism through a transmission rope assembly. A cover body is connected to the back surface of the rear substrate. A shaft hole matching with the rear transmission shaft is provided on the rear bottom plate of the cover body. The rear transmission shaft is rotatably connected to the rear bottom plate. A fourth elastic member is connected between the rear bottom plate and the rear rotating wheel. When the first rear reflector is in the rear reflection position, the elastic potential energy of the fourth elastic member is the smallest; when the second rear reflector is in the rear reflection position, the elastic potential energy of the fourth elastic member is the largest.

[0022] Further, the rear substrate is provided with a rear mounting hole. The rear positioning unit includes a fifth elastic member and a positioning ball arranged in the rear mounting hole. When the first rear reflector is in the reflection position, a part of the positioning ball enters one of the positioning holes; when the second rear reflector is in the reflection position, a part of the positioning ball enters the other positioning hole.

[0023] Further, the two sides of the cover body are provided with lugs. The lugs are provided with connecting grooves. The rear substrate is provided with connecting holes. The cover body is fixedly connected to the rear substrate through a connecting member.

[0024] Further, an XY moving mechanism is further included. The XY moving mechanism includes an X moving mechanism and Y moving mechanisms on both sides of the X moving mechanism. The X moving mechanism is connected to the Y moving mechanisms on both sides. The rear substrate is connected to the X moving mechanism. The intermediate mirror switching mechanism is arranged on the X moving mechanism. The transmission rope assembly includes a flexible sleeve and a core wire. The middle part of the core wire is sleeved with the flexible sleeve and can move relative to the flexible sleeve.

[0025] Further, the linear mechanism includes a bracket, on which a bottom plate and a vertical support plate are fixedly connected. On the front surface of the vertical support plate, a vertical guide rail and a vertically arranged servo motor are connected. A vertical slider is slidably connected to the vertical guide rail, and the servo motor is drivingly connected to a lead screw. The lead screw is threadedly connected to a nut block, and the nut block is fixedly connected to a lifting block. One end of the lifting block is fixedly connected to the vertical slider, and the other end of the lifting block is fixedly connected to the first front mirror.

[0026] Further, N dimming mirrors are provided between the first laser emitter and the first front mirror, and / or N dimming mirrors are provided between the second laser reflector and the second front mirror.

[0027] Advantages of the present invention: By providing a mirror switching mechanism, when different lasers are applied, the corresponding mirrors can be switched, effectively reducing the absorption loss of the laser and improving the laser utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a working principle of the laser engraving machine in this embodiment.

[0029] Figure 2 It is a second schematic diagram of a working principle of the laser engraving machine in this embodiment.

[0030] Figure 3 It is a schematic diagram of a structure of the laser engraving machine in this embodiment.

[0031] Figure 4 It is Figure 3 a schematic diagram of another perspective structure.

[0032] Figure 5 It is a schematic diagram of a structure of the intermediate mirror switching mechanism in this embodiment.

[0033] Figure 6 It is Figure 5 a schematic diagram of a structure excluding the positioning sleeve.

[0034] Figure 7 It is a schematic diagram of a cooperation between the intermediate rotating disk, the middle rotating shaft and the rotating sleeve in this embodiment.

[0035] Figure 8 It is Figure 7 a schematic exploded view.

[0036] Figure 9 It is Figure 8 a schematic diagram of another perspective.

[0037] Figure 10 It is a schematic diagram of a structure of the positioning sleeve.

[0038] Figure 11A schematic structural diagram of the rear mirror switching mechanism cooperating with the laser engraving head in this embodiment.

[0039] Figure 12 For Figure 11 Another perspective schematic diagram.

[0040] Figure 13 For Figure 12 A schematic structural diagram of removing the cover body.

[0041] Figure 14 For Figure 13 The enlarged schematic diagram at position A in

[0042] Figure 15 A schematic diagram of the rear positioning unit cooperating with the rear rotating disk.

[0043] Figure 16 A schematic structural diagram of the front mirror adjusting mechanism.

[0044] Reference numerals:

[0045] 1 - Laser engraving head; 2 - Rear mirror switching mechanism; 3 - Intermediate mirror switching mechanism; 4 - Front mirror adjusting mechanism; 5 - First laser emitter; 6 - Second laser emitter; 7 - Light - adjusting mirror; 10 - Transmission rope assembly; 21 - First rear mirror; 22 - Second rear mirror; 23 - Rear rotating disk; 24 - Rotating arm; 25 - Rear substrate; 26 - Cover body; 27 - Fourth elastic member; 28 - Rear rotating wheel; 29 - Rear transmission shaft; 210 - Intermediate shaft; 211 - Rear elastic transmission member; 212 - Rear rotating shaft; 213 - Positioning ball; 214 - Fifth elastic member; 261 - Lug; 262 - Connecting groove; 31 - First middle mirror; 32 - Second middle mirror; 33 - Substrate; 34 - Intermediate rotating disk; 35 - Positioning sleeve; 36 - Rotating sleeve; 37 - Third elastic member; 38 - Intermediate wheel; 39 - Elastic transmission member; 310 - Middle rotating shaft; 311 - Outer convex block; 341 - Positioning hole; 342 - Connecting column; 351 - Positioning column; 352 - Positioning ball; 353 - Second elastic member; 361 - Inner convex block; 362 - Axle hole; 363 - Connecting hole; 41 - First front mirror; 42 - Second front mirror; 43 - Lead screw; 44 - Lifting block; 45 - Nut block; 46 - Servo motor; 47 - Vertical guide rail; 48 - Vertical slider; 49 - Vertical support plate; 410 - Base plate; 8 - XY moving mechanism; 81 - X moving mechanism; 82 - Y moving mechanism. Detailed implementation manners

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be 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 application and are not used to limit the present application.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0048] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application.

[0049] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings. As Figures 1 to 16 shown.

[0051] Example 1: Refer to Figures 1 to 4; A dual-laser processing device, comprising: a first laser emitter 5 and a second laser emitter 6 that respectively emit a first laser and a second laser externally; further comprising: a laser engraving head 1, a rear mirror switching mechanism 2, an intermediate mirror switching mechanism 3, and a front mirror adjustment mechanism 4; wherein: the front mirror adjustment mechanism 4 comprises a first front mirror 41 and a second front mirror 42 that are respectively used to reflect the first laser and the second laser to the intermediate mirror switching mechanism 3, and a front adjustment mechanism for adjusting the position of the first front mirror 41; the intermediate mirror switching mechanism 3 comprises a first intermediate mirror 31 and a second intermediate mirror 32 that are respectively used to reflect the first laser and the second laser to the rear mirror switching mechanism 2, and an intermediate switching mechanism for switching the first intermediate mirror 31 and the second intermediate mirror 32 to enter the intermediate reflection position; the rear mirror switching mechanism 2 comprises a first rear mirror 21 and a second rear mirror 22 that are respectively used to reflect the first laser and the second laser to the laser engraving head 1, and a rear switching mechanism for switching the first rear mirror 21 and the second rear mirror 22 to enter the rear reflection position.

[0052] This technical solution improves the existing dual-light-source laser processing machine by replacing the existing single intermediate mirror and single rear mirror with an intermediate mirror mechanism and a rear mirror mechanism respectively; during use, in the initial state: the front mirror is in the first front reflection position, the first intermediate mirror is in the intermediate reflection position, and the first rear mirror 21 is in the rear reflection position; at this time, if the first laser emitter 5 works and the second laser emitter 6 does not work; the front adjustment mechanism, the intermediate switching mechanism, and the rear switching mechanism do not need to act; the first laser is projected onto the first front mirror 41, and then is successively reflected to the first intermediate mirror, the first rear mirror 21, and the laser engraving head 1. When switching to the second laser emitter 6 to work, the first laser emitter 5 stops working, and at this time the front adjustment mechanism moves the first front mirror 41 out of the first front reflection position; the second front mirror 42 is always in the second front reflection position, and the first front mirror 41 is located between the second front mirror 42 and the intermediate mirror switching mechanism 3; the intermediate switching mechanism acts, the first intermediate mirror 31 moves out of the intermediate reflection position, and the second intermediate mirror 32 enters the intermediate reflection position; the rear switching mechanism also acts, the first rear mirror 21 moves out of the rear reflection position, and the second rear mirror 22 enters the rear reflection position. The second laser is projected onto the second front mirror 42, then reflected to the second intermediate mirror 32, then reflected to the second rear mirror 22, and finally reflected to the laser engraving head 1. When switching back to the first laser emitter 5 to work again, the second laser emitter 6 stops working, the front adjustment mechanism moves the first front mirror 41 into the first front reflection position, the intermediate switching mechanism moves the first intermediate mirror 31 into the intermediate reflection position, and the rear switching mechanism moves the first rear mirror 21 into the rear reflection position.

[0053] It can be seen that when the first laser emitter 5 works, the first laser is reflected successively by the first front mirror 41, the first middle mirror 31, and the first rear mirror 21; when the second laser emitter 6 works, the second laser is reflected successively by the second front mirror 42, the second middle mirror 32, and the second rear mirror 22. Therefore, in specific settings, the first front mirror 41, the first middle mirror 31, and the first rear mirror 21 can select a reflective material with the lowest absorption rate for the first laser; similarly, the second front mirror 42, the second middle mirror 32, and the second rear mirror 22 can select a reflective material with the lowest absorption rate for the second laser, thereby effectively reducing the absorption of laser energy, reducing absorption loss, and improving laser utilization efficiency.

[0054] Wherein, the front adjustment mechanism includes a linear mechanism for driving the first front mirror 41 to move or a rotating mechanism for driving the first front mirror 41 to rotate.

[0055] The front adjustment mechanism is used to adjust the position of the first front mirror 41 and move the first front mirror 41 into or out of the first front reflection position. When moving in and out, a mobile linear mechanism or a rotating rotating mechanism can be used. When using a linear mechanism, a linear module such as a linear motor or a cylinder can be used to drive the first front mirror 41 to move linearly. Secondly, when moving, it can move in any horizontal direction, or in the vertical direction or the inclined direction, and is adjusted according to actual needs. When rotating, an eccentric rotation method can be used, such as fixing the first front mirror 41 at an eccentric position of a turntable and driving the turntable to rotate by a motor.

[0056] See Figures 5 to 9 , the intermediate switching mechanism includes: an intermediate rotating disk 34, a rotating sleeve 36, and a substrate 33. The intermediate rotating disk 34 is provided with two spaced installation positions and is respectively used to connect the first middle mirror 31 and the second middle mirror 32; the substrate 33 is provided with a shaft hole and is rotatably connected with a middle rotating shaft 310. The lower end of the rotating sleeve 36 is open, the upper end of the rotating sleeve 36 is fixedly connected with the intermediate rotating disk 34, the inner bottom surface of the rotating sleeve 36 is provided with a shaft hole 362 and is rotatably connected with the upper end of the middle rotating shaft 310. An elastic transmission member 39 is connected between the rotating sleeve 36 and the middle rotating shaft 310, and the middle rotating shaft 310 drives the rotating sleeve 36 to rotate through the elastic transmission member 39; the intermediate rotating disk 34 is connected with a positioning module. When one of the first middle mirror 31 and the second middle mirror 32 is located at the intermediate reflection position, the intermediate rotating disk 34 is temporarily positioned by the positioning module, and the elastic transmission member 39 is deformed.

[0057] When designing the switching between the first middle mirror 31 and the second middle mirror 32, this embodiment adopts the combination of the middle rotating shaft 310 and the middle rotating disk 34. The first middle mirror 31 and the second middle mirror 32 are fixed to the middle rotating disk 34. The middle rotating disk 34 is indirectly connected to the middle rotating shaft 310 and is driven by an external force to connect to the middle rotating shaft 310. The middle rotating shaft 310 drives the middle rotating disk 34 to rotate, thereby realizing the position switching of the first middle mirror 31 and the second middle mirror 32 and switching to the middle reflection position. When the position is switched by driving the middle rotating disk 34 to rotate by the middle rotating shaft 310, due to laser reflection, the angular position requirements for the rotation of the middle rotating disk 34 are extremely strict, and there are certain errors in the current transmission mechanism and driving mechanism. Therefore, those skilled in the art generally adopt high-precision transmission mechanisms and driving mechanisms, but this will inevitably lead to a sharp increase in costs. Therefore, in this embodiment, the combination of positioning and buffering technologies is adopted. A positioning module is used to position the middle reflection position of the middle rotating disk 34. When the middle rotating disk 34 rotates to a position where one of the first middle mirror 31 and the second middle mirror 32 is in the middle reflection position, the positioning module positions the middle rotating disk 34, temporarily fixes the middle rotating disk 34, and meets the requirements of laser reflection. At the same time, the method of adding a rotating sleeve 36 is adopted. The rotating sleeve 36 is fixedly connected to the middle rotating disk 34, and the rotating sleeve 36 is rotatably connected to the middle rotating shaft 310 and can rotate freely with each other. At the same time, the middle rotating shaft 310 is connected to the rotating sleeve 36 through an elastic transmission member 39. When the middle rotating shaft 310 rotates, the rotating sleeve 36 is driven to rotate through the elastic transmission member 39. When the rotating sleeve 36 drives the middle rotating disk 34 to rotate to a position where one of the first middle mirror 31 and the second middle mirror 32 is in the middle reflection position, the middle rotating disk 34 and the rotating sleeve 36 stop rotating. The elastic transmission member 39 may still have elastic potential energy, but this elastic potential energy is not enough to cause the positioning module to release the middle rotating disk 34. Secondly, when the rotating sleeve 36 is fixedly connected to the middle rotating disk 34, bonding or other methods can be used. In this embodiment, refer to Figure 8 。 Figure 9 , a connecting column 342 extends downward from the middle rotating disk 34, and the rotating sleeve 36 is provided with a connecting hole 363. The connecting column 342 is inserted into the connecting hole 363 to fixedly connect the middle rotating disk 34 and the rotating sleeve 36; the connecting column 342 and the connecting hole 363 can be connected by interference fit.

[0058] It can be understood that, for the convenience of driving the rotary sleeve 36 and the intermediate rotary disk 34 to rotate to a predetermined position, the rotation angle of the middle rotating shaft 310 can be slightly larger than the rotation angle of the rotary sleeve 36. For example, the rotation angle of the middle rotating shaft 310 is 1-5 degrees larger than the rotation angle of the rotary sleeve 36. For the convenience of description, it is initially set that: the first middle reflector 31 is located at the middle reflection position, and the initial rotation angles of the middle rotating shaft 310 and the rotary sleeve 36 are both 0; when switching, the middle rotating shaft 310 rotates under an external force, and the middle rotating shaft 310 applies a pulling force to the rotary sleeve 36 through the elastic transmission member 39. Initially, due to the relatively large positioning force of the positioning module on the intermediate rotary disk 34, the elastic potential energy of the elastic transmission member 39 cannot be overcome; when the middle rotating shaft 310 rotates a certain angle, such as 20 or 30 degrees, when the elastic potential energy accumulated by the elastic transmission member 39 can overcome the positioning force of the positioning module on the intermediate rotary disk, the elastic transmission member 39 drives the rotary sleeve 36 and the intermediate rotary disk 34 to rotate, the positioning module releases the intermediate rotary disk, and the potential energy of the elastic transmission member 39 gradually decreases and approaches 0; when the second middle reflector 32 on the intermediate rotary disk 34 enters the middle reflection position, the positioning module positions the intermediate rotary disk 34 again, and the intermediate rotary disk 34 and the rotary sleeve 36 stop rotating, while the rotation angle of the middle rotating shaft 310 exceeds the rotation angle of the rotary sleeve 36. If the rotation angle of the rotary sleeve 36 is A degrees at this time, the rotation angle of the middle rotating shaft 310 is (A + B) degrees; B is 1-5, and A can be 90-180, such as 90, 135 or 180, etc.; the elastic transmission member 39 maintains a small deformation and always has a pulling force on the rotary sleeve 36.

[0059] When switching again, the middle rotating shaft 310 rotates reversely under an external force, the elastic potential energy of the elastic transmission member 39 first decreases to 0 and then increases. When the elastic potential energy of the elastic transmission member 39 can overcome the positioning resistance of the positioning module on the intermediate rotary disk 34 again, the elastic transmission member 39 drives the rotary sleeve 36 to rotate, and the intermediate rotary disk 34 also rotates accordingly; the elastic potential energy of the elastic transmission member 39 gradually decreases and approaches 0; when the first middle reflector 31 on the intermediate rotary disk 34 enters the middle reflection position, the positioning module positions the intermediate rotary disk 34 again, and the intermediate rotary disk 34 and the rotary sleeve 36 stop rotating, while the rotation angle of the middle rotating shaft 310 will successively exceed the rotation angle of the rotary sleeve 36. If the position corresponding angle of the rotary sleeve 36 is 0 degrees at this time, the position corresponding angle of the middle rotating shaft 310 is -B degrees; the elastic transmission member 39 still has a small deformation. The range of B can be 1-5.

[0060] During the switching process, no matter when the first intermediate mirror 31 and the second mirror are switched to the intermediate reflection position, the elastic transmission member 39 always maintains a slight deformation; the rotation angle of the intermediate rotating shaft 310 is greater than the rotation angle of the rotating sleeve 36, so as to ensure that the intermediate rotating disk 34 can smoothly switch the first intermediate mirror 31 and the second intermediate mirror 32. Secondly, the intermediate rotating shaft 310 can be rotatably connected to the rotating sleeve 36 and the substrate 33 respectively through the intermediate rotating shaft 310.

[0061] See Figure 8 , a plurality of inner convex blocks 361 are provided on the inner side surface of the rotating sleeve 36, a plurality of outer convex blocks 311 are provided on the side surface of the intermediate rotating shaft 310, and the elastic transmission member 39 is connected between adjacent inner convex blocks 361 and outer convex blocks 311.

[0062] In order to enable the rotating sleeve 36 to rotate along with the intermediate rotating shaft 310, in this embodiment, a following method is adopted. Inner convex blocks 361 are provided on the inner side surface of the rotating sleeve 36, outer convex blocks 311 are provided on the side surface of the intermediate rotating shaft 310, and the elastic transmission member 39 is connected between adjacent inner convex blocks 361 and outer convex blocks 311. The elastic transmission member 39 can be an elastic rope, a tension spring, etc.; after the intermediate rotating shaft 310 rotates, the outer convex block 311 drives the inner convex block 361 to move through the elastic transmission member 39 and drives the rotating table to rotate. In this embodiment, there are 2 inner convex blocks 361 and outer convex blocks 311 respectively; of course, 3 or more can also be provided respectively.

[0063] See Figure 5 , Figure 7 and Figure 10 , the positioning module includes a positioning sleeve 35. The lower end of the positioning sleeve 35 is connected to the substrate 33. A plurality of positioning columns 351 are provided at the lower end of the positioning sleeve 35, and the substrate 33 is provided with insertion holes matching the positioning columns 351; an installation hole is provided at the upper end of the positioning sleeve 35. A positioning ball 352 and a second elastic member 353 for pushing the positioning ball 213 outwards are provided in the installation hole. The upper end of the positioning ball 352 abuts against the lower end surface of the intermediate rotating disk 34. Two positioning holes 341 are provided on the lower end surface of the intermediate rotating disk 34, and the two positioning holes 341 are correspondingly arranged with the first intermediate mirror 31 and the second intermediate mirror 32; when the first intermediate mirror 31 is in the intermediate reflection position, the upper end of the positioning ball 213 enters one of the positioning holes 341; when the second intermediate mirror 32 is in the intermediate reflection position, the upper end of the positioning ball 352 enters the other positioning hole 341.

[0064] When the positioning module positions the intermediate rotating disk 34, it can only be when one of the first intermediate mirror 31 and the second intermediate mirror 32 enters the intermediate reflection position. At other times, it has no or very little acting force on the intermediate rotating disk 34 to avoid interfering with the rotation of the intermediate rotating disk 34. In this embodiment, the cooperation of the positioning ball 213 and the positioning hole 341 is adopted; two correspondingly arranged positioning holes 341 are provided on the lower end surface of the intermediate rotating disk 34. An installation hole is provided at the upper end of the positioning sleeve 35, and a second elastic member 353 and a positioning ball 352 are provided in the installation hole. When the first laser emitter 5 works, the first intermediate mirror 31 is in the intermediate reflection position, and the positioning ball 352 is caught in one of the positioning holes 341; when switching is required, the first elastic member applies a pulling force to the rotating sleeve 36, and the intermediate rotating disk 34 overcomes the resistance brought by the positioning ball 352. The intermediate rotating disk 34 pushes the positioning ball 213 towards the positioning hole 341 and rotates; until the other positioning hole 341 on the intermediate rotating disk 34 faces the positioning ball 352, and the positioning ball 352 is caught in the other positioning hole 341. The positioning hole 341 is a spherical crown hole, and its volume is not greater than 1 / 2 of the positioning ball 352; it can be 1 / 4, 1 / 3, 1 / 2, etc. of the positioning ball 352.

[0065] See Figure 6 , a lower end of the middle rotating shaft 310 is connected with an intermediate wheel 38. The intermediate wheel 38 is connected with the front adjustment mechanism through a transmission rope assembly 10. A third elastic member 37 for assisting the intermediate wheel 38 to reset is arranged between the intermediate wheel 38 and the substrate 33; when the first intermediate mirror 31 is in the intermediate reflection position, the elastic potential energy of the third elastic member 37 is the smallest; when the second intermediate mirror 32 is in the intermediate reflection position, the elastic potential energy of the third elastic member 37 is the largest.

[0066] When switching, the front adjustment mechanism, the intermediate switching mechanism, and the rear switching mechanism act simultaneously or do not act. These three mechanisms can be respectively driven by 3 driving devices to act independently, which will result in a relatively high cost; secondly, since the distances of these 3 mechanisms may be relatively far, it will also cause difficulties in wiring. If a wireless signal control method is adopted, the cost will inevitably increase. Therefore, in this embodiment, a linkage structure is adopted. The front adjustment mechanism is connected with the intermediate wheel 38 through the transmission rope assembly 10; when the front adjustment mechanism adjusts the position of the first front mirror 41, it drives the intermediate wheel 38 to rotate through the transmission rope assembly 10, and then drives the middle rotating shaft 310 and the like to rotate, so as to realize the switching between the first intermediate mirror 31 and the second intermediate mirror 32.

[0067] During operation, the specific process is as follows: 1. In the initial state, the first laser emitter 5 is operating, the first front reflector 41 is in the front reflection position, and the first middle reflector 31 is in the middle reflection position. 2. When switching to the second laser emitter 6 for operation, the first emitter stops working; the front adjustment mechanism drives the first front reflector 41 away from the first front reflection position. At the same time, it drives the intermediate wheel 38 to rotate through the transmission rope assembly 10. When the intermediate wheel 38 rotates, it drives the middle rotating shaft 310 to rotate. Meanwhile, the deformation of the third elastic member 37 increases, and its elastic potential energy increases; the elastic potential energy of the second elastic member 353 also increases. When it can overcome the resistance of the positioning ball 213 to the intermediate rotating disk 34, the middle rotating shaft 310 drives the rotating sleeve 36 and the intermediate rotating disk 34 to rotate through the second elastic member 353. When the second middle reflector 32 is in the middle reflection position, another positioning hole 341 of the intermediate rotating disk 34 cooperates with the positioning ball 213 to form an insertion connection, and the intermediate rotating disk 34 and the rotating sleeve 36 stop rotating. The intermediate wheel 38 and the middle rotating shaft 310 still rotate forward by a small angle and then stop. At this time, the elastic potential energy of the third elastic member 37 reaches the maximum, and the second elastic member 353 still retains a small amount of elastic potential energy. 3. When switching back to the first laser emitter 5 for operation again, the second laser emitter 6 stops working. The front adjustment mechanism drives the first front reflector 41 into the first front reflection position. The front adjustment mechanism will release the transmission rope assembly 10, and the transmission rope assembly 10 no longer applies power to the intermediate wheel 38. The intermediate wheel 38 loses power. At this time, the third elastic member 37 releases its own elastic potential energy, and the third elastic member 37 drives the intermediate wheel 38 and the middle rotating shaft 310 to rotate. The elastic potential energy of the second elastic member 353 begins to gradually decrease to 0 and then increases again. When the elastic force of the second elastic member 353 is sufficient to overcome the resistance of the positioning ball 352 to the intermediate rotating disk 34, the rotating sleeve 36 and the intermediate rotating disk 34 rotate under the pulling of the second elastic member 353; the elastic force of the second elastic member 353 becomes smaller; when the positioning ball 352 cooperates with the positioning hole 341 of the intermediate rotating disk 34 to form an insertion connection, the rotating sleeve 36 and the intermediate rotating disk 34 stop rotating, and the third elastic member 37 continues to release elastic potential energy. The intermediate rotating wheel and the middle rotating shaft 310 continue to rotate by a small angle, and the elastic potential energy of the second elastic member 353 increases slightly; finally, the third elastic member 37 still retains the minimum elastic potential energy, and the pulling forces of the third elastic member 37 and the second elastic member 353 on the middle rotating shaft 310 reach equilibrium. By setting the third elastic member 37 and the transmission rope assembly 10, physical linkage can be achieved.

[0068] See Figures 11 to 15 , the rear switching mechanism includes: a rear rotating disk 23 and a rear substrate 25; the rear rotating disk 23 is provided with two rotating arms 24, and the two rotating arms 24 are respectively connected to the first rear reflector 21 and the second rear reflector 22; the rear substrate 25 is vertically arranged. See Figure 14, a shaft hole is provided at the upper end of the rear substrate 25 and is rotatably connected to a rear rotating shaft 212. One end of the rear rotating shaft 212 passes through the shaft hole and is connected to the rear rotating disk 23. The lower end of the rear substrate 25 is connected to the laser engraving head 1; it further includes an intermediate shaft 210, a rear transmission shaft 29, and a rear positioning unit provided on the rear substrate 25. Both ends of the intermediate shaft 210 are respectively rotatably connected to the rear transmission shaft 29 and the rear rotating shaft 212. A rear elastic transmission member 211 is connected between the rear transmission shaft 29 and the rear rotating shaft 212; the rear rotating disk 23 is provided with 2 rear positioning holes for positioning with the positioning unit; when the first rear mirror 21 or the second rear mirror 22 is in the reflection position, the rear positioning unit is connected to the rear rotating disk 23 through a corresponding rear positioning hole and prevents the rear rotating disk 23 from rotating.

[0069] The rear switching mechanism uses two rotating arms 24 of the rear rotating disk 23 to connect to the first rear mirror 21 and the second rear mirror 22, and switches the first rear mirror 21 and the second rear mirror 22 to enter the rear reflection position by the rotation of the rear rotating disk 23; secondly, the rear rotating disk 23 is connected to the rear rotating shaft 212, and the rear rotating shaft 212 is rotatably connected to the rear substrate 25, and the rear rotating shaft 212 can rotate freely relative to the rear substrate 25; in a specific implementation, the rear rotating shaft 212 can be connected to the rear substrate 25 through a bearing to achieve free rotation; it can be understood that: the rotation of the rear rotating shaft 212 can be directly controlled to control the switching of the first rear mirror 21 and the second rear mirror 22; however, since very high precision is required for laser reflection, if the rotation of the rear rotating shaft 212 is directly controlled, a relatively high driving device is required, and the cost is relatively high; if the precision is relatively low, accurate laser reflection cannot be achieved; for this reason, the present application adopts the combination of the rear positioning unit, the rear transmission shaft 29, and the rear elastic transmission member 211. After the rear transmission shaft 29 is driven by an external force to rotate, the rear transmission shaft 29 drives the rear rotating shaft 212 to rotate through the rear elastic transmission member 211, and then drives the rear rotating disk 23 to rotate. When the first rear mirror 21 or the second rear mirror 22 enters the rear reflection position, the rear positioning unit positions the rear rotating disk 23 and resists the rotation of the rear disk, so as to ensure the accuracy of the optical path.

[0070] In the initial state: The first rear reflector 21 is in the rear reflection position, and the rear positioning unit positions the rear rotating disk 23. When switching, the rear transmission shaft 29 rotates under the drive of an external force. In the initial stage, the resistance of the rear positioning unit to the rear rotating disk 23 is relatively large, the rear rotating shaft 212 remains stationary, and the rear elastic transmission member continuously deforms and accumulates elastic potential energy. When the elastic potential energy accumulated by the rear elastic transmission member can overcome the resistance of the rear positioning unit to the rear rotating disk 23, the rear rotating disk 23 breaks away from the positioning point and rotates. The rear rotating shaft 212 rotates rapidly and closely follows the rear transmission shaft 29, and the elastic potential energy of the rear elastic transmission member 211 gradually decreases. When the second rear reflector 22 enters the rear reflection position, the rear positioning unit positions the rear rotating disk 23 again. At this time, the elastic potential energy of the rear elastic transmission member 211 cannot overcome the resistance of the rear positioning unit to the rear rotating disk 23, and the rear rotating disk 23 and the rear rotating shaft 212 stop rotating. At this time, the rear transmission shaft 29 also stops rotating or continues to rotate a very small angle and then stops, and the elastic potential energy of the rear elastic transmission member 211 finally remains in a state of relatively small potential energy. When switching again, the rear transmission shaft 29 rotates reversely under the drive of an external force. Similarly, in the initial stage, the resistance of the rear positioning unit to the rear rotating disk 23 is relatively large, the rear rotating shaft 212 and the rear rotating disk 23 remain stationary, and the elastic potential energy of the rear elastic transmission member 211 first decreases to 0 and then continues to increase and accumulate elastic potential energy. When the elastic potential energy accumulated by the rear elastic transmission member 211 can overcome the resistance of the rear positioning unit to the rear rotating disk 23, the rear rotating disk 23 breaks away from the positioning point and rotates. The rear rotating shaft 212 rotates rapidly and closely follows the rear transmission shaft 29, and the elastic potential energy of the rear elastic transmission member 211 gradually decreases. When the first rear reflector 21 enters the rear reflection position, the rear positioning unit positions the rear rotating disk 23 again. At this time, the elastic potential energy of the rear elastic transmission member 211 cannot overcome the resistance of the rear positioning unit to the rear rotating disk 23, and the rear rotating disk 23 and the rear rotating shaft 212 stop rotating. At this time, the rear transmission shaft 29 also stops rotating or continues to rotate a very small angle and then stops, and the elastic potential energy of the rear elastic transmission member 211 finally remains in a state of relatively small potential energy.

[0071] During the switching process, the rear drive elastic member 211 needs to accumulate potential energy in the initial stage to overcome the resistance of the rear positioning unit to the rear rotating disk 23. When the first rear mirror 21 or the second rear mirror 22 enters the rear reflection position, the rear positioning unit positions the rear rotating disk 23 again; to ensure that the rear rotating disk 23 can drive the first rear mirror 21 and the second rear mirror 22 into the rear reflection position, the rear drive elastic unit 211 always maintains elastic potential energy, that is, the deformation amount, so as to prevent the situation that the rear drive shaft 29 cannot drive the rear rotating shaft 212 and the rear rotating disk 23 to rotate to the predetermined position; secondly, the rotation angle range of the rear drive shaft 29 is greater than the rotation range of the rear rotating shaft 212, and the rotation angle of the rear drive shaft 29 has a lower accuracy requirement. Generally speaking, when switching, it only needs the rotation angle of the rear drive shaft 29 to be 0-10 degrees greater than the rotation angle of the rear rotating shaft 212, so as to ensure that when the positioning unit positions the rear rotating disk 23, the rear drive elastic member 211 has a small elastic potential energy, and this elastic potential energy cannot drive the rotating disk to break away from the positioning point.

[0072] Both ends of the intermediate shaft 210 can be respectively connected to the rear drive shaft 29 and the rear rotating shaft 212 through bearings, so that the rotations of the rear drive shaft 29 and the rear rotating shaft 212 do not interfere with each other. The rear drive elastic member 211 can be: a torsion spring, a rubber band, a tension spring, etc.

[0073] See Figure 13 、 Figure 14 One end of the rear rotating shaft 212 is connected with a rear rotating wheel 28, and the rear rotating wheel 28 is connected to the front adjustment mechanism or the intermediate switching mechanism through a transmission rope assembly 10. See Figure 12 On the back of the rear substrate 25, a cover body 26 is connected. The rear bottom plate of the cover body 26 is provided with a shaft hole matching the rear drive shaft 29, and the rear drive shaft 29 is rotatably connected to the rear bottom plate. A fourth elastic member 27 is connected between the rear bottom plate and the rear rotating wheel 28. When the first rear mirror 21 is in the rear reflection position, the elastic potential energy of the fourth elastic member 27 is the smallest, and when the second rear mirror 22 is in the rear reflection position, the elastic potential energy of the fourth elastic member 27 is the largest.

[0074] When the rear switching mechanism is switching, it can be driven by an independent drive mechanism; for example, the rear rotating shaft 212 is connected with a servo motor 46, and the rotation of the rear rotating shaft 212 is driven by the servo motor 46 to drive the rotation of the rear rotating disk 23. In this embodiment, in order to simplify the structure and reduce costs, a linkage structure is adopted. The front adjustment mechanism directly drives the rear rotating wheel 28 to rotate through the transmission rope assembly 10, or the front adjustment mechanism drives the rear rotating wheel 28 to rotate through the intermediate switching mechanism. Secondly, when the transmission rope assembly 10 is transmitting power, it is a one-way transmission. Therefore, a fourth elastic member 27 is also adopted in this embodiment.

[0075] In the initial state, since the fourth elastic member 27 has a small elastic potential energy, the rear transmission shaft 29 rotates a small angle toward the side close to the fourth elastic member 27. The rear transmission elastic member 211 also has a small elastic potential energy and is in balance with the fourth elastic member 27. At this time, the first rear mirror 21 is in the rear reflection position, the rear positioning unit positions the rear rotating disk 23, and the rear rotating disk 23 is displaced to the first positioning point. The rear transmission elastic member 211 cannot drive the rear rotating shaft 212 and the rear rotating disk 23 to rotate. During switching, driven by the front adjustment mechanism, through the transmission of the transmission rope assembly 10, the rear rotating wheel 28 is driven to rotate, the rear rotating shaft 212 rotates, and the elastic potential energy of the fourth elastic member 27 continuously increases; the elastic potential energy of the rear transmission elastic member 211 first decreases to 0 and then increases and accumulates until the elastic potential energy of the rear transmission elastic member 211 can drive the rear rotating disk 23 to rotate. The rear rotating disk 23 leaves the positioning point and, driven by the rear transmission elastic member, the rear rotating disk 23 rotates with the rear rotating shaft 212; the elastic potential energy of the rear transmission elastic member 211 becomes smaller and may approach 0; when the second rear mirror 22 enters the rear reflection position, the rear rotating disk 23 and the rear middle rotating shaft 310 stop rotating; at this time, the rear rotating wheel 28 stops rotating or continues to rotate a small angle, such as 1 - 3 degrees, etc.; the elastic potential energy of the rear transmission elastic member 211 slightly increases but is still too small to drive the rear rotating disk 23 away from the second positioning point; at the same time, the deformation of the fourth elastic member 27 reaches the maximum and has the maximum elastic potential energy.

[0076] When switching again, the front adjustment mechanism releases the transmission rope assembly 10, and the transmission rope assembly 10 no longer applies a force to the rotating wheel; the fourth elastic member 27 applies a reverse force to the rotating wheel, the rotating wheel drives the rear transmission shaft 29 to rotate in the reverse direction, and the elastic potential energy of the rear transmission elastic member 211 decreases to 0 and then increases until it can drive the rear rotating disk 23 away from the second positioning point. The elastic potential energy of the rear transmission elastic member 211 then becomes smaller and drives the rear rotating shaft 212 and the rear rotating disk 23 to rotate; when the first rear mirror 21 enters the rear reflection position, the rear rotating disk 23 reaches the first positioning point, the rear rotating disk 23 and the rear rotating shaft 212 stop rotating, the elastic potential energy of the rear transmission elastic member 211 is too small to drive, and the fourth elastic member 27 continues to drive the rear transmission shaft 29 to rotate a very small angle. The elastic potential energy of the rear transmission elastic member 211 increases and reaches balance with the fourth elastic member 27 again. The fourth elastic member 27 resets to the minimum elastic potential energy state, and this minimum elastic potential energy is greater than 0. The fourth elastic member 27 can be a torsion spring, a tension spring, an elastic rope, etc. The cover 26 can support the rear transmission shaft 29 and at the same time assist in connecting the fourth elastic member 27. The cover 26 can be rotationally connected to the rear transmission shaft 29 through a bearing.

[0077] See Figure 15, the rear substrate 25 is provided with rear mounting holes, and the rear positioning unit includes a fifth elastic member 214 and a positioning ball 352 disposed in the rear mounting holes. When the first rear mirror 21 is in the reflection position, a part of the positioning ball 352 enters one of the rear positioning holes; when the second rear mirror 22 is in the reflection position, a part of the positioning ball 352 enters the other rear positioning hole.

[0078] The positioning ball 352 has a tendency to leave the rear mounting hole under the push of the fifth elastic member 214. The positioning hole is a spherical crown hole, having 1 / 4 - 1 / 2 of the positioning ball 352; when neither the first rear mirror 21 nor the second rear mirror 22 is in the reflection position, the positioning ball 352 abuts against the rear substrate 25. When the rear substrate 25 rotates, the positioning ball 352 can also rotate, and the frictional force between the two is relatively small and can be ignored. When the first rear mirror 21 or the second rear mirror 22 is in the reflection position, the positioning ball 352 enters the rear positioning hole, and the positioning ball 352 forms a snap connection with the rear vertical substrate 33, thereby preventing the rotation of the rear rotating disk 23. Preferably, the positioning hole is 2 / 5, 3 / 7, etc. of the positioning ball 352. Of course, the rear positioning unit can also directly be positioning bumps provided on the rear substrate 25, and the positioning bumps cooperate with the rear positioning holes.

[0079] See Figure 12 , both sides of the cover 26 are provided with lugs 261, the lugs 261 are provided with connecting grooves 262, the rear substrate 25 is provided with connecting holes, and the cover 26 is fixedly connected to the rear substrate 25 through a connecting member.

[0080] To facilitate the connection between the cover 26 and the rear substrate 25, in this embodiment, lugs 261 are provided on both sides of the cover 26, and the lugs 261 are connected to the rear substrate 25 through a connecting member. The connecting member can be a screw or a bolt.

[0081] See Figure 3 、 Figure 4 , further includes an XY moving mechanism 8. The XY moving mechanism 8 includes an X moving mechanism 81 and Y moving mechanisms 82 located on both sides of the X moving mechanism 81. The X moving mechanism 81 is connected to the Y moving mechanisms 82 on both sides. The rear substrate 25 is connected to the X moving mechanism 81. The intermediate mirror switching mechanism 3 is disposed on the X moving mechanism 81. The transmission rope assembly 10 includes a flexible sleeve and a core wire. The middle part of the core wire is sleeved with the flexible sleeve and can move relative to the flexible sleeve.

[0082] To facilitate the planar movement of the laser engraving head 1, an XY movement mechanism 8 is also provided in this embodiment. The Y movement mechanism 82 can drive the X movement mechanism 81 to move longitudinally, and the X movement mechanism 81 drives the rear substrate 25 and the laser engraving head 1 to move laterally, thereby realizing the two-dimensional planar movement of the laser engraving head 1. When the laser engraving head 1 moves planarly, the intermediate mirror switching mechanism 3 will also move longitudinally along with the X movement mechanism 81, and the laser engraving head 1 and the rear substrate 25 will move laterally under the drive of the X movement mechanism 81. Therefore, the rear mirror switching mechanism 2 will move laterally under the drive of the X movement mechanism 81; it can be seen that the distance between the intermediate mirror switching mechanism 3 and the front mirror adjustment mechanism 4 will change, and the distances between the rear mirror switching mechanism 2 and the intermediate mirror switching mechanism 3 and the front mirror adjustment mechanism 4 will also change. These changes will directly affect the transmission rope assembly 10. To enable the front mirror adjustment mechanism 4 to still drive the rear mirror switching mechanism 2 and the intermediate mirror switching mechanism 3 through the transmission rope assembly 10 during these changes, the transmission rope assembly 10 in this embodiment is set as a combination of a flexible sleeve and a core wire. The flexible sleeve is fixed on the frame, and a drag chain can be set when necessary. The flexible sleeve is connected to the drag chain, and the flexible sleeve deforms along with the drive of the XY movement mechanism 8. The front adjustment mechanism of the front mirror adjustment mechanism 4 is connected to the mirror switching mechanism and the intermediate mirror switching mechanism 3 respectively through the core wire. It can be understood that: the front adjustment mechanism is connected to the intermediate mirror switching through the transmission rope assembly 10, and the front adjustment mechanism is connected to the intermediate rotating wheel through the core wire. The front adjustment mechanism is connected to the rear mirror switching through another transmission rope assembly 10, and the front adjustment mechanism is connected to the rear rotating wheel 28 through the corresponding core wire. Or, the intermediate mirror switching mechanism 3 is connected to the rear mirror switching through another transmission rope assembly 10, and the intermediate rotating wheel is connected to the rear rotating wheel 28 through the corresponding core wire. When the XY movement mechanism 8 drives the laser engraving head 1 to perform two-dimensional planar movement, the flexible sleeve and the core wire change accordingly. When switching, the core wire will move relative to the flexible sleeve. For example, the front adjustment mechanism drives the intermediate rotating wheel and the rear rotating wheel 28 to rotate through the core wire; or the front adjustment mechanism releases the core wire, and the intermediate rotating wheel and the rear rotating wheel 28 wind the core wire. The flexible sleeve can be made of materials such as plastic, silica gel, rubber, etc., and the core wire can be made of metal wire, such as copper wire, steel wire, etc.

[0083] Both the X movement mechanism 81 and the Y movement mechanism 82 can adopt linear modules, such as linear motors, lead screw 43 nut mechanisms, etc., and such can adopt existing technologies.

[0084] See Figure 16The linear mechanism includes a bracket, which is provided with a fixedly connected base plate 410 and a vertical support plate 49, the front of the vertical support plate 49 is connected to a vertical guide rail 47 and a vertically arranged servo motor 46, the vertical guide rail 47 is slidably connected to a vertical slider 48, the servo motor 46 is drivingly connected to a lead screw 43, the lead screw 43 is threadedly connected to a nut block 45, the nut block 45 is fixedly connected to a lifting block 44, one end of the lifting block 44 is fixedly connected to the vertical slider 48, and the other end of the lifting block 44 is fixedly connected to the first front reflector 41.

[0085] In this embodiment, the front adjustment mechanism adopts a linear mechanism, specifically a vertically arranged linear module. The linear module adopts a lead screw 43 nut structure to drive the lead screw 43 to rotate through a servo motor 46. When the lead screw 43 rotates, the nut block 45 moves up and down along the lead screw 43. To ensure that its movement is linear, a vertical guide rail 47 and a vertical slider 48 are also provided in this embodiment. The vertical slider 48 and the nut block 45 are respectively connected to the lifting block 44. The lifting block 44 moves up and down linearly under the drive of the nut block 45 and the guidance of the vertical slider 48. At the same time, the lifting block 44 drives the first front reflector 41 to move up and down. Secondly, since the position of the second front reflector 42 is always in a fixed state, it is set on the vertical support plate 49 in this embodiment for the convenience of setting. Of course, it can also be set on the frame. At the same time, the lifting block 44 is also fixedly connected to the core wire. When the lifting block 44 is lifted and lowered, it drives the core wire to move, and drives the intermediate switching mechanism and the rear switching mechanism to be linked through the core wire. In the initial state of this embodiment, the first front reflector 41 is located at the first front reflective position; when switching, the lifting block 44 drives the first front reflector 41 to leave the first front reflective position, and the lifting block 44 pulls the core wire and drives the middle switching mechanism and the rear switching mechanism to move synchronously to perform corresponding switching. The arrangement of the core wire can be wired according to actual needs.

[0086] See also Figure 2 N dimming reflectors 7 are provided between the first laser emitter 5 and the first front reflector 41 , and / or N dimming reflectors 7 are provided between the second laser reflector and the second front reflector 42 .

[0087] During the specific setting, the positions of the first laser emitter 5 and the second laser emitter 6 are not fixed and can be set according to the setting of the rack. In order to facilitate the adjustment of the optical path so that the first laser or the second laser is projected onto the first front reflector 41 or the second front reflector 42 in a predetermined direction, a dimming reflector 7 can be set to improve the optical path.

[0088] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A dual laser processing device, comprising: The first laser emitter and the second laser emitter respectively emit the first laser and the second laser externally; It is characterized in that: it further includes: a laser engraving head, a rear mirror switching mechanism, an intermediate mirror switching mechanism, and a front mirror adjusting mechanism; The front mirror adjusting mechanism includes a first front mirror and a second front mirror respectively used for reflecting the first laser and the second laser to the intermediate mirror switching mechanism, and a front adjusting mechanism used for adjusting the position of the first front mirror; The intermediate mirror switching mechanism includes a first intermediate mirror and a second intermediate mirror respectively used for reflecting the first laser and the second laser to the rear mirror switching mechanism, and an intermediate switching mechanism used for switching the first intermediate mirror and the second intermediate mirror to enter the intermediate reflection position; The rear mirror switching mechanism includes a first rear mirror and a second rear mirror respectively used for reflecting the first laser and the second laser to the laser engraving head, and a rear switching mechanism used for switching the first rear mirror and the second rear mirror to enter the rear reflection position; The intermediate switching mechanism includes: an intermediate rotating disk, a rotating sleeve, and a substrate. The intermediate rotating disk is provided with 2 installation positions arranged at intervals and is respectively used for connecting the first intermediate mirror and the second intermediate mirror; the substrate is provided with a shaft hole and is rotatably connected with an intermediate rotating shaft. The lower end of the rotating sleeve is open, the upper end of the rotating sleeve is fixedly connected with the intermediate rotating disk, the inner bottom surface of the rotating sleeve is provided with a shaft hole and is rotatably connected with the upper end of the intermediate rotating shaft. An elastic transmission member is connected between the rotating sleeve and the intermediate rotating shaft, and the intermediate rotating shaft drives the rotating sleeve to rotate through the elastic transmission member; the intermediate rotating disk is connected with a positioning module. When one of the first intermediate mirror and the second intermediate mirror is in the intermediate reflection position, the intermediate rotating disk is temporarily positioned by the positioning module, and the elastic transmission member is deformed; A plurality of inner convex blocks are arranged on the inner side surface of the rotating sleeve, and a plurality of outer convex blocks are arranged on the side surface of the intermediate rotating shaft. The elastic transmission member is connected between the adjacent inner convex blocks and outer convex blocks; The positioning module includes a positioning sleeve. The lower end of the positioning sleeve is connected with the substrate. The upper end of the positioning sleeve is provided with a mounting hole. A positioning ball and a second elastic member for pushing the positioning ball outwards are arranged in the mounting hole. The upper end of the positioning ball abuts against the lower end surface of the intermediate rotating disk. The lower end surface of the intermediate rotating disk is provided with 2 positioning holes, and the 2 positioning holes are correspondingly arranged with the first intermediate mirror and the second intermediate mirror; when the first intermediate mirror is in the intermediate reflection position, the upper end of the positioning ball enters one of the positioning holes; when the second intermediate mirror is in the intermediate reflection position, the upper end of the positioning ball enters the other positioning hole; The lower end of the intermediate rotating shaft is connected with an intermediate wheel. The intermediate wheel is connected with the front adjusting mechanism through a transmission rope assembly. A third elastic member for assisting the intermediate wheel to reset is arranged between the intermediate wheel and the substrate; when the first intermediate mirror is in the intermediate reflection position, the elastic potential energy of the third elastic member is the smallest; when the second intermediate mirror is in the intermediate reflection position, the elastic potential energy of the third elastic member is the largest.

2. The dual laser processing device according to claim 1, wherein: It further includes an XY moving mechanism. The XY moving mechanism includes an X moving mechanism and Y moving mechanisms located on both sides of the X moving mechanism. The X moving mechanism is connected to the Y moving mechanisms on both sides, the rear substrate is connected to the X moving mechanism, the intermediate mirror switching mechanism is arranged on the X moving mechanism. The transmission rope assembly includes a flexible sleeve and a core wire. The middle part of the core wire is sleeved with the flexible sleeve and can move relative to the flexible sleeve.

3. The dual laser processing device according to claim 1 or 2, characterized in that: The front adjustment mechanism includes a linear mechanism for driving the first front mirror to move. The linear mechanism includes a bracket, and the bracket is provided with a fixedly connected bottom plate and a vertical support plate. The front surface of the vertical support plate is connected with a vertical guide rail and a vertically arranged servo motor. A vertical slider is slidably connected to the vertical guide rail. The servo motor is drivingly connected with a lead screw. The lead screw is threadedly connected with a nut block. The nut block is fixedly connected with a lifting block. One end of the lifting block is fixedly connected with the vertical slider, and the other end of the lifting block is fixedly connected with the first front mirror.

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