A laser engraving machine

Abstract

This utility model relates to a laser engraving machine, comprising: a work frame, a conveying mechanism, a first laser engraving mechanism, and a second laser engraving mechanism. The first and second tracks of the conveying mechanism are spaced apart on the work frame, and the first and second laser engraving mechanisms are distributed on both sides of the conveying mechanism. This allows for simultaneous laser engraving of labels on the upper and lower surfaces of circuit boards located on the first and second tracks, improving laser engraving efficiency. Furthermore, by incorporating the first and second tracks, the machine is compatible with both dual-track and single-track automatic conveyor lines, enhancing its compatibility. It can engrave labels using dual-track double-sided laser engraving, dual-track single-sided laser engraving, and single-track double-sided laser engraving modes, better adapting to different production scenarios and needs.

Description

Technical Field

[0001] This utility model relates to the field of laser engraving machine technology, and in particular to a laser engraving machine. Background Technology

[0002] As an indispensable and important component of electronic products, PCBs are gradually developing towards miniaturization, densification and integration. In the PCB manufacturing process, in order to facilitate the traceability of the production information of the circuit board, a label code is usually printed on the circuit board. In this way, the corresponding circuit board can be traced through the label code on the circuit board later.

[0003] Laser engraving, also known as laser carving or laser marking, is a surface treatment process that uses optical principles to engrave text or patterns on products. When using laser engraving equipment to engrave labels on PCBs, the PCB board needs to be transported to the laser engraving area of ​​the laser engraving equipment via a conveyor device. However, existing laser engraving equipment can only be adapted to a single track type of automated conveyor line, making it difficult to match different types of automated conveyor lines in the PCB automated production process. Utility Model Content

[0004] Therefore, it is necessary to provide a laser engraving machine.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A laser engraving machine, comprising:

[0006] Work rack;

[0007] The conveying mechanism includes: a first track and a second track, the first track and the second track being spaced apart on the work frame;

[0008] The first laser engraving mechanism includes: a first horizontal plate, a first vertical plate, and a first laser engraving head. The first horizontal plate is slidably disposed on the work frame, and the first vertical plate is slidably disposed on the first horizontal plate. The sliding direction of the first horizontal plate on the work frame is perpendicular to the sliding direction of the first vertical plate on the first horizontal plate. The first laser engraving head is disposed on the first vertical plate and is spaced apart from the first side of the conveying mechanism.

[0009] The second laser engraving mechanism includes a second horizontal plate, a second vertical plate, and a second laser engraving head. The second horizontal plate is slidably mounted on the work frame, and the second vertical plate is slidably mounted on the second horizontal plate. The sliding direction of the second horizontal plate on the work frame is perpendicular to the sliding direction of the second vertical plate on the second horizontal plate. The second laser engraving head is mounted on the second vertical plate and is spaced apart from the second side of the conveying mechanism.

[0010] In one embodiment, the first laser engraving mechanism further includes: a first mounting plate, which is slidably disposed on the first vertical moving plate and moves toward or away from the conveying mechanism; a first laser engraving head is disposed on the first mounting plate; a first lead screw is rotatably disposed on the first vertical moving plate; a first lead screw nut is disposed on the first mounting plate; the first lead screw nut is screwed onto the first lead screw; and a first adjusting handle is disposed on one end of the first lead screw.

[0011] In one embodiment, the second laser engraving mechanism further includes: a second mounting plate, which is slidably disposed on the second vertical moving plate and moves toward or away from the conveying mechanism; a second laser engraving head is disposed on the second mounting plate; a second lead screw is rotatably disposed on the second vertical moving plate; a second lead screw nut is disposed on the second mounting plate; the second lead screw nut is screwed onto the second lead screw; and a second adjusting handle is disposed on one end of the second lead screw.

[0012] In one embodiment, the first laser engraving mechanism further includes a first positioning camera, which is mounted on the first mounting plate.

[0013] In one embodiment, the second laser engraving mechanism further includes a second positioning camera, which is disposed on the second mounting plate.

[0014] In one embodiment, the first laser engraving mechanism further includes a first dust removal pipe, which is disposed on the first vertical moving plate.

[0015] In one embodiment, the second laser engraving mechanism further includes a second dust removal pipe, which is disposed on the second vertical moving plate.

[0016] In one embodiment, the first track includes: two first guide rail plates, which are spaced apart on the work frame. Each first guide rail plate is rotatably provided with two first pulleys, and a first conveyor belt is rotatably wound around the two first pulleys. Each first guide rail plate is provided with a first driver, which is drivenly connected to one of the first pulleys.

[0017] In one embodiment, the second track includes: two second guide rail plates, which are spaced apart on the work frame; each second guide rail plate is rotatably provided with two second pulleys, and a second conveyor belt is rotatably wound around the two second pulleys; each second guide rail plate is provided with a second driver, which is drivenly connected to one of the second pulleys.

[0018] In one embodiment, each first guide rail plate is provided with two first limiting rods spaced apart, each first limiting rod moves toward or away from the first conveyor belt. Each first guide rail plate is provided with two third drivers spaced apart, each third driver is driven connected to a first limiting rod. Each second guide rail plate is provided with two second limiting rods spaced apart, each second limiting rod moves toward or away from the second conveyor belt. Each second guide rail plate is provided with two fourth drivers spaced apart, each fourth driver is driven connected to a second limiting rod.

[0019] The beneficial effects of this utility model are as follows: The laser engraving machine provided by this utility model, with a first track and a second track spaced apart on the work frame via a conveyor mechanism, and a first laser engraving mechanism and a second laser engraving mechanism distributed on both sides of the conveyor mechanism, can simultaneously engrave labels on the upper and lower surfaces of circuit boards located on the first track and the second track, thus improving laser engraving efficiency. Furthermore, by providing the first track and the second track, it can be adapted to both dual-track and single-track automatic conveyor lines, improving the compatibility of the laser engraving machine. It can engrave labels in dual-track double-sided laser engraving, dual-track single-sided laser engraving, and single-track double-sided laser engraving modes, better adapting to different production scenarios and needs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a laser engraving machine according to one embodiment;

[0022] Figure 2 This is a schematic diagram of the structure of a laser engraving machine according to one embodiment;

[0023] Figure 3 This is a schematic diagram of the structure of a laser engraving machine according to one embodiment;

[0024] Figure 4 This is a schematic diagram of the structure of the first laser engraving mechanism in one embodiment;

[0025] Figure 5 This is a schematic diagram of the structure of the first laser engraving mechanism in one embodiment;

[0026] Figure 6This is a schematic diagram of the structure of the second laser engraving mechanism in one embodiment;

[0027] Figure 7 This is a schematic diagram of the structure of the first and second tracks in one embodiment.

[0028] In the attached diagram, 10 is a laser engraving machine; 100 is a work frame; 200 is a conveying mechanism; 210 is a first track; 211 is a first guide rail plate; 212 is a first pulley; 213 is a first conveyor belt; 214 is a first driver; 215 is a first limiting rod; 216 is a third driver; 220 is a second track; 221 is a second guide rail plate; 222 is a second pulley; 223 is a second conveyor belt; 224 is a second driver; 225 is a second limiting rod; 226 is a fourth driver; 300 is a first laser engraving mechanism; and 310 is a first transverse plate. 320. First vertical moving plate; 321. First lead screw; 322. First adjusting handle; 330. First laser engraving head; 340. First mounting plate; 341. First lead screw nut; 350. First positioning camera; 360. First dust removal duct; 400. Second laser engraving mechanism; 410. Second horizontal moving plate; 420. Second vertical moving plate; 421. Second lead screw; 422. Second adjusting handle; 430. Second laser engraving head; 440. Second mounting plate; 441. Second lead screw nut; 450. Second positioning camera; 460. Second dust removal duct. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solution of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0030] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0031] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a laser engraving machine 10 includes: a work frame 100, a conveying mechanism 200, a first laser engraving mechanism 300, and a second laser engraving mechanism 400. The conveying mechanism 200 includes: a first track 210 and a second track 220, which are spaced apart on the work frame 100. The first laser engraving mechanism 300 includes: a first horizontal plate 310, a first vertical plate 320, and a first laser engraving head 330. The first horizontal plate 310 is slidably disposed on the work frame 100, and the first vertical plate 320 is slidably disposed on the first horizontal plate 310. The sliding direction of the first horizontal plate 310 on the work frame 100 is opposite to the sliding direction of the first vertical plate 320 on the first horizontal plate 310. Vertically, the first laser engraving head 330 is disposed on the first vertical moving plate 320, and the first laser engraving head 330 is spaced apart from the first side of the conveying mechanism 200. The second laser engraving mechanism 400 includes: a second horizontal moving plate 410, a second vertical moving plate 420, and a second laser engraving head 430. The second horizontal moving plate 410 is slidably disposed on the work frame 100, and the second vertical moving plate 420 is slidably disposed on the second horizontal moving plate 410. The sliding direction of the second horizontal moving plate 410 on the work frame 100 is perpendicular to the sliding direction of the second vertical moving plate 420 on the second horizontal moving plate 410. The second laser engraving head 430 is disposed on the second vertical moving plate 420, and the second laser engraving head 430 is spaced apart from the second side of the conveying mechanism 200.

[0032] In this embodiment, the first track 210 and the second track 220 of the conveying mechanism 200 are spaced apart on the work frame 100. The conveying directions of the first track 210 and the second track 220 are parallel and the same. The first laser engraving mechanism 300 and the second laser engraving mechanism 400 are distributed on both sides of the conveying mechanism 200, that is, the first laser engraving mechanism 300 is located above the first track 210 and the second track 220, and the second laser engraving mechanism 400 is located below the first track 210 and the second track 220. The first transverse plate 310 moves along the X-axis direction on the work frame 100, and the first vertical plate 320 moves along the Y-axis direction on the first transverse plate 310, which can drive the first laser engraving head 330. Moving along the X and Y axes, the first laser engraving head 330 is an ultraviolet laser, used to engrave QR codes or barcodes on the upper surface of the circuit board. The second horizontal moving plate 410 moves along the X-axis on the work frame 100, and the second vertical moving plate 420 moves along the Y-axis on the second horizontal moving plate 410, which can drive the second laser engraving head 430 to move in the X and Y axes. The second laser engraving head 430 is an ultraviolet laser, used to engrave QR codes or barcodes on the lower surface of the circuit board, thereby enabling simultaneous laser engraving of labels on the upper and lower surfaces of the circuit board located on the first track 210 and the second track 220, improving laser engraving efficiency. It is worth noting that the methods of driving the first transverse plate 310 and the second transverse plate 410 to slide on the work frame 100, the first vertical plate 320 to slide on the first transverse plate 310, and the second vertical plate 420 to slide on the second transverse plate 410 are techniques that are known to those skilled in the art and are achievable. In this embodiment, they will not be described in detail. For example, they can be achieved by the cooperation of a motor, a lead screw, and a lead screw nut.

[0033] In this embodiment, a first track 210 and a second track 220 are spaced apart on the work rack 100. While adapting to a dual-track automatic conveyor line, it can laser engrave circuit boards on the first track 210 and the second track 220. It can also adapt to a single-track automatic conveyor line, that is, it can laser engrave circuit boards on the first track 210 or the second track 220 individually. This improves the compatibility of the laser engraving machine 10, which can laser engrave label codes in dual-track double-sided laser engraving, dual-track single-sided laser engraving, and single-track double-sided laser engraving modes, and can better adapt to different production scenarios and needs.

[0034] In one embodiment, such as Figure 4 and Figure 5As shown, the first laser engraving mechanism 300 further includes: a first mounting plate 340, which is slidably disposed on the first vertical moving plate 320 and moves towards or away from the conveying mechanism 200; a first laser engraving head 330 is disposed on the first mounting plate 340; a first lead screw 321 is rotatably disposed on the first vertical moving plate 320; a first lead screw nut 341 is disposed on the first mounting plate 340 and screwed onto the first lead screw 321; and a first adjusting handle 322 is disposed on one end of the first lead screw 321. Specifically, the first mounting plate 340 moves along the Z-axis on the first vertical moving plate 320, which can drive the first laser engraving head 330 to move closer to or further away from the conveying mechanism 200. That is, the operator can rotate the first adjusting handle 322 to drive the first lead screw 321 to rotate, and with the first lead screw nut 341, the first mounting plate 340 can move up and down on the first vertical moving plate 320. This allows the operator to adjust the working distance of the first laser engraving head 330, that is, to adjust the distance between the first laser engraving head 330 and the circuit board on the first track 210 or the second track 220. This ensures that the laser focus of the first laser engraving head 330 can accurately fall on the upper surface of the circuit board, improving the accuracy of laser engraving QR codes or barcodes, and making the pattern clearer and more accurate.

[0035] In one embodiment, such as Figure 6 As shown, the second laser engraving mechanism 400 further includes: a second mounting plate 440, which is slidably mounted on the second vertical moving plate 420 and moves towards or away from the conveying mechanism 200; a second laser engraving head 430 is mounted on the second mounting plate 440; a second lead screw 421 is rotatably mounted on the second vertical moving plate 420; a second lead screw nut 441 is mounted on the second mounting plate 440 and screwed onto the second lead screw 421; and a second adjusting handle 422 is mounted on one end of the second lead screw 421. Specifically, the second mounting plate 440 moves along the Z-axis on the second vertical moving plate 420, which can drive the second laser engraving head 430 to move closer to or further away from the conveying mechanism 200. That is, the operator can rotate the second adjusting handle 422 to drive the second lead screw 421 to rotate, and with the second lead screw nut 441, the second mounting plate 440 can move up and down on the second vertical moving plate 420. This allows the operator to adjust the working distance of the second laser engraving head 430, that is, to adjust the distance between the second laser engraving head 430 and the circuit board on the first track 210 or the second track 220. This ensures that the laser focus of the second laser engraving head 430 can accurately fall on the lower surface of the circuit board, improving the accuracy of laser engraving QR codes or barcodes, and making the pattern clearer and more accurate.

[0036] In one embodiment, such as Figure 4 and Figure 5 As shown, the first laser engraving mechanism 300 further includes a first positioning camera 350, which is mounted on the first mounting plate 340. Specifically, by providing the first positioning camera 350, the laser engraving position can be accurately located via signal communication, achieving automatic positioning. Thus, after the circuit board enters the laser engraving area, the first positioning camera 350 can quickly capture an image and transmit it to the control system. After analysis by the image processing algorithm, the control system can quickly confirm the laser engraving position on the upper surface of the circuit board, thereby accurately engraving a QR code or barcode at the corresponding position on the circuit board.

[0037] In one embodiment, such as Figure 6 As shown, the second laser engraving mechanism 400 further includes a second positioning camera 450, which is mounted on the second mounting plate 440. Specifically, by providing the second positioning camera 450, the laser engraving position can be accurately located via signal communication, achieving automatic positioning. Thus, after the circuit board enters the laser engraving area, the second positioning camera 450 can quickly capture an image and transmit it to the control system. After analysis by the image processing algorithm, the control system can quickly confirm the laser engraving position on the lower surface of the circuit board, thereby accurately engraving a QR code or barcode at the corresponding position on the circuit board.

[0038] In one embodiment, such as Figure 4 and Figure 5 As shown, the first laser engraving mechanism 300 further includes a first dust removal pipe 360, which is disposed on the first vertical moving plate 320. Specifically, by providing the first dust removal pipe 360, with its inlet located close to the laser engraving area, and in conjunction with an external fan, a negative pressure environment can be formed inside the first dust removal pipe 360. The first dust removal pipe 360 ​​has sufficient suction power to promptly remove the smoke and dust generated in the laser engraving area, keeping the working environment clean and the circuit board surface clean.

[0039] In one embodiment, such as Figure 6 As shown, the second laser engraving mechanism 400 further includes a second dust removal pipe 460, which is disposed on the second vertical moving plate 420. Specifically, by providing the second dust removal pipe 460, with its inlet located close to the laser engraving area, and in conjunction with an external fan, a negative pressure environment can be created within the second dust removal pipe 460. The second dust removal pipe 460 has sufficient suction power to promptly remove the smoke and dust generated in the laser engraving area, maintaining a clean working environment and a clean circuit board surface.

[0040] In one embodiment, such as Figure 7As shown, the first track 210 includes two first guide rail plates 211, which are spaced apart on the work frame 100. Each first guide rail plate 211 has two first pulleys 212 rotatably mounted at intervals, and a first conveyor belt 213 is rotatably wound around each of the two first pulleys 212. Each first guide rail plate 211 is equipped with a first driver 214, which is rotatably connected to one of the first pulleys 212. Specifically, the two first guide rail plates 211 are arranged opposite to each other on the work frame 100. A first conveyor belt 213 is rotatably mounted on the opposite side of each of the two first guide rail plates 211, i.e., the first conveyor belt 213 is wound around the two rotatably mounted first pulleys 212. The first driver 214 drives one of the first pulleys 212 to rotate, thereby driving the first conveyor belt 213 to move. The first driver 214 is a motor, thus enabling the first track 210 to transport circuit boards via belt conveying.

[0041] In one embodiment, such as Figure 7 As shown, the second track 220 includes two second guide rail plates 221, which are spaced apart on the work frame 100. Each second guide rail plate 221 has two second pulleys 222 rotatably mounted at intervals, and a second conveyor belt 223 is rotatably wound around each of the two second pulleys 222. Each second guide rail plate 221 is equipped with a second driver 224, which is rotatably connected to one of the second pulleys 222. Specifically, the two second guide rail plates 221 are arranged opposite to each other on the work frame 100. A second conveyor belt 223 is rotatably mounted on the opposite side of each second guide rail plate 221, i.e., the second conveyor belt 223 is wound around the two rotatably mounted second pulleys 222. The second driver 224 drives one of the second pulleys 222 to rotate, thereby driving the second conveyor belt 223 to move. The second driver 224 is a motor, thus enabling the second track 220 to transport circuit boards via belt conveying.

[0042] In one embodiment, such as Figure 7As shown, each of the first guide rail plates 211 is provided with two first limiting rods 215 at intervals. Each first limiting rod 215 moves towards or away from the first conveyor belt 213. Each of the first guide rail plates 211 is provided with two third drivers 216 at intervals. Each third driver 216 is driven to connect with a first limiting rod 215. Each of the second guide rail plates 221 is provided with two second limiting rods 225 at intervals. Each second limiting rod 225 moves towards or away from the second conveyor belt 223. Each of the second guide rail plates 221 is provided with two fourth drivers 226 at intervals. Each fourth driver 226 is driven to connect with a second limiting rod 225. Specifically, four first limiting rods 215 on the two first guide rail plates 211 form a limiting area with a square cross-section. The size of the limiting area is adapted to the specifications of the circuit board and can play a limiting role. The third driver 216 is a cylinder. The third driver 216 drives the first limiting rods 215 to move forward onto the first conveyor belt 213, blocking the circuit board on the first conveyor belt 213, so that the circuit board can be positioned on the first track 210, which facilitates the first laser engraving mechanism 300 and the second laser engraving mechanism 400 to engrave double-sided labels on the circuit board on the first track 210. Correspondingly, the four second limiting rods 225 on the two second guide rail plates 221 form a limiting area with a square cross-section. The size of the limiting area is adapted to the specifications of the circuit board and can play a limiting role. The fourth driver 226 is a cylinder. The fourth driver 226 drives the second limiting rods 225 to move forward onto the second conveyor belt 223, blocking the circuit board on the second conveyor belt 223, so that the circuit board can be positioned on the second track 220, which facilitates the first laser engraving mechanism 300 and the second laser engraving mechanism 400 to engrave double-sided labels on the circuit board on the second track 220.

[0043] In one embodiment, the workbench 100 is provided with two adjustable rails spaced apart. Each first guide rail plate 211 is slidably disposed on the two adjustable rails, and the two first guide rail plates 211 move toward or away from each other. Specifically, the two first guide rail plates 211 are slidably disposed on the two adjustable rails respectively. By moving the two first guide rail plates 211 toward or away from each other, the distance between the two first guide rail plates 211 can be adjusted to adjust the gauge of the first rail 210, thereby enabling the first rail 210 to transport circuit boards of various specifications.

[0044] In one embodiment, each of the second guide rail plates 221 is slidably disposed on the two adjusting rails, and the two second guide rail plates 221 move toward or away from each other. Specifically, the two second guide rail plates 221 are slidably disposed on the two adjusting rails respectively. By moving the two second guide rail plates 221 toward or away from each other, the distance between the two second guide rail plates 221 can be adjusted to adjust the track gauge of the second rail 220, thereby enabling the second rail 220 to transport circuit boards of various specifications. It is worth noting that the movement of the two first guide rail plates 211 toward or away from each other and the movement of the two second guide rail plates 221 toward or away from each other can be achieved by a motor, a lead screw, and a lead screw nut.

[0045] Compared with the prior art, the present invention has at least the following advantages:

[0046] This utility model provides a laser engraving machine. A first track and a second track are spaced apart on a work frame via a conveyor mechanism. A first laser engraving mechanism and a second laser engraving mechanism are distributed on both sides of the conveyor mechanism. This allows for simultaneous laser engraving of labels on the upper and lower surfaces of circuit boards located on the first and second tracks, improving laser engraving efficiency. Furthermore, the inclusion of the first and second tracks allows for compatibility with both dual-track and single-track automatic conveyor lines, enhancing the machine's compatibility. It can engrave labels using dual-track double-sided laser engraving, dual-track single-sided laser engraving, and single-track double-sided laser engraving modes, better adapting to different production scenarios and needs.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A laser engraving machine, characterized in that, include: Work rack; The conveying mechanism includes: a first track and a second track, the first track and the second track being spaced apart on the work frame; The first laser engraving mechanism includes: a first horizontal plate, a first vertical plate, and a first laser engraving head. The first horizontal plate is slidably disposed on the work frame, and the first vertical plate is slidably disposed on the first horizontal plate. The sliding direction of the first horizontal plate on the work frame is perpendicular to the sliding direction of the first vertical plate on the first horizontal plate. The first laser engraving head is disposed on the first vertical plate and is spaced apart from the first side of the conveying mechanism. The second laser engraving mechanism includes a second horizontal plate, a second vertical plate, and a second laser engraving head. The second horizontal plate is slidably mounted on the work frame, and the second vertical plate is slidably mounted on the second horizontal plate. The sliding direction of the second horizontal plate on the work frame is perpendicular to the sliding direction of the second vertical plate on the second horizontal plate. The second laser engraving head is mounted on the second vertical plate and is spaced apart from the second side of the conveying mechanism.

2. The laser engraving machine according to claim 1, characterized in that, The first laser engraving mechanism further includes: a first mounting plate, which is slidably mounted on the first vertical moving plate and moves towards or away from the conveying mechanism; a first laser engraving head is mounted on the first mounting plate; a first lead screw is rotatably mounted on the first vertical moving plate; a first lead screw nut is mounted on the first mounting plate and screwed onto the first lead screw; and a first adjusting handle is mounted on one end of the first lead screw.

3. The laser engraving machine according to claim 2, characterized in that, The second laser engraving mechanism further includes: a second mounting plate, which is slidably mounted on the second vertical moving plate and moves towards or away from the conveying mechanism; a second laser engraving head is mounted on the second mounting plate; a second lead screw is rotatably mounted on the second vertical moving plate; a second lead screw nut is mounted on the second mounting plate and screwed onto the second lead screw; and a second adjusting handle is mounted on one end of the second lead screw.

4. The laser engraving machine according to claim 3, characterized in that, The first laser engraving mechanism further includes a first positioning camera, which is mounted on the first mounting plate.

5. The laser engraving machine according to claim 4, characterized in that, The second laser engraving mechanism further includes a second positioning camera, which is mounted on the second mounting plate.

6. The laser engraving machine according to claim 1, characterized in that, The first laser engraving mechanism further includes: a first dust removal pipe, which is disposed on the first vertical moving plate.

7. The laser engraving machine according to claim 6, characterized in that, The second laser engraving mechanism also includes a second dust removal pipe, which is disposed on the second vertical moving plate.

8. The laser engraving machine according to claim 1, characterized in that, The first track includes: two first guide rail plates, which are spaced apart on the work frame. Each first guide rail plate is rotatably provided with two first pulleys, and a first conveyor belt is rotatably wound around the two first pulleys. Each first guide rail plate is provided with a first driver, which is drivenly connected to one of the first pulleys.

9. The laser engraving machine according to claim 8, characterized in that, The second track includes: two second guide rail plates, which are spaced apart on the work frame. Each second guide rail plate is rotatably equipped with two second pulleys, and a second conveyor belt is rotatably wound around the two second pulleys. Each second guide rail plate is equipped with a second driver, which is drivenly connected to one of the second pulleys.

10. The laser engraving machine according to claim 9, characterized in that, Each first guide rail plate is provided with two first limiting rods at intervals, and each first limiting rod moves toward or away from the first conveyor belt. Each first guide rail plate is provided with two third drivers at intervals, and each third driver is driven to connect with a first limiting rod. Each second guide rail plate is provided with two second limiting rods at intervals, and each second limiting rod moves toward or away from the second conveyor belt. Each second guide rail plate is provided with two fourth drivers at intervals, and each fourth driver is driven to connect with a second limiting rod.

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