A device for synchronously laser marking upper and lower surfaces of a workpiece

Abstract

The utility model discloses a device for workpiece upper and lower surface synchronous laser coding, including frame, the frame from top to bottom sequentially has upper coding mechanism, adjustable width conveying track and lower coding mechanism, and adjustable width conveying track is used for adjusting width to convey the workpiece of different size, and upper coding mechanism includes upper X axle linear moving subassembly, upper Y axle linear moving subassembly and upper Z axle linear moving subassembly, is provided with upper Y axle linear moving subassembly on upper X axle linear moving subassembly, is installed with upper Z axle linear moving subassembly on upper Y axle linear moving subassembly, is provided with upper laser on upper Z axle linear moving subassembly, and the front end of upper laser is installed with upper galvanometer, upper industry camera and upper field mirror, and upper industry camera and upper field mirror are side by side arrangement and towards workpiece, and the structure of lower coding mechanism and upper coding mechanism is similar. This device can adapt to the conveying of different size workpiece and double -sided laser coding operation simultaneously, and production efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of partial improvement design technology of laser marking equipment, and in particular to a device for simultaneous laser marking on the upper and lower surfaces of a workpiece. Background Technology

[0002] Laser marking primarily utilizes a laser generator to produce a high-energy continuous laser beam, which is then focused onto the workpiece surface by a laser marking device. This instantaneous melting or even vaporization of the surface material leaves a permanent mark. With societal development, laser marking is widely used in industrial production. For example, when workpieces require double-sided laser marking, one side needs to be marked first, followed by the other. Typically, this involves manually flipping the workpiece before the laser marking device can perform the marking. This process is time-consuming and prone to errors, affecting marking accuracy. While flipping devices are available, their complex structure and time-consuming operation prevent simultaneous double-sided laser marking, thus hindering production efficiency.

[0003] In the prior art, patent CN107471831A discloses a high-efficiency double-sided coding machine, including an operating table, a fixed plate, a controller, cylinder one, cylinder two, a motor, a transmission roller, an upper coding plate, and a lower coding plate. The operating table is mounted on a support, the fixed plate is mounted on a column, the controller is mounted on the fixed plate, cylinder one is mounted on the fixed plate, cylinder two is mounted on the operating table, the motor is mounted on a bearing plate, the transmission roller is mounted between two positioning plates via a connecting shaft, and the driven wheel is connected to the driving wheel via a belt. This invention provides cylinder one and cylinder two on the fixed plate and operating table respectively, with the upper coding plate mounted on the adjusting rod of cylinder one and the lower coding plate mounted on the adjusting rod of cylinder two. This allows for selection of single-sided coding or simultaneous double-sided coding according to different coding requirements of plastic packaging bags, greatly improving the coding efficiency of objects.

[0004] Patent CN218197578U discloses an automatic double-sided coding device, belonging to the field of automation equipment. The automatic double-sided coding device includes: a feeding device installed close to a pushing device; a conveying device installed above the feeding and pushing devices, capable of transporting the parts to be coded between them; a conveying channel connected to the pushing device; a correction device installed on the upper surface of the conveying channel near one end of the pushing device; an upper coding device installed above the conveying channel; a lower coding device installed below the conveying channel; and a receiving device connected to the conveying channel and installed in a finished product transport device. The conveying device transports the parts to be coded to the pushing device, which then sends them to the conveying channel, where they are corrected by the correction device. The upper and lower coding devices then complete double-sided printing. The entire process is highly efficient and accurate, saving manpower and resources, reducing scrap rates, and saving production costs.

[0005] In order to solve one of the above problems, this application provides a device for synchronous laser marking on the upper and lower surfaces of a workpiece. Utility Model Content

[0006] The purpose of this invention is to solve the problems existing in the prior art by proposing a device for simultaneous laser marking on both sides of a workpiece. It can adapt to the conveying of workpieces of different sizes and perform simultaneous laser marking on both sides, resulting in high production efficiency.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a device for synchronous laser marking on the upper and lower surfaces of a workpiece, comprising a frame, wherein an upper marking mechanism, an adjustable width conveyor track, and a lower marking mechanism are sequentially mounted on the frame from top to bottom. The adjustable width conveyor track is used to adjust the width to convey workpieces of different sizes. The upper marking mechanism includes an upper X-axis linear motion component, an upper Y-axis linear motion component, and an upper Z-axis linear motion component. An upper Y-axis linear motion component is mounted on the upper X-axis linear motion component, and an upper Z-axis linear motion component is mounted on the upper Y-axis linear motion component. The component is equipped with an upper laser, and an upper galvanometer, an upper industrial camera, and an upper field mirror are mounted at the front end of the upper laser. The upper industrial camera and the upper field mirror are arranged side by side and face the workpiece. The lower marking mechanism includes a lower X-axis linear motion component, a lower Y-axis linear motion component, and a lower Z-axis linear motion component. A lower Y-axis linear motion component is arranged below the lower X-axis linear motion component, a lower Z-axis linear motion component is mounted below the lower Y-axis linear motion component, and a lower laser is arranged below the lower Z-axis linear motion component. A lower galvanometer, a lower industrial camera, and a lower field mirror are mounted at the front end of the lower laser. The lower industrial camera and the lower field mirror are arranged side by side and face the workpiece.

[0008] Furthermore, as described above, the adjustable width conveyor track includes a fixed part and a movable part with the same structure. The movable part includes a movable plate and an eighth belt drive assembly mounted on the movable plate. The movable plate is driven by a seventh screw mechanism to move closer to or away from the fixed part. The fixed part includes a fixed plate and a ninth belt drive assembly mounted on the fixed plate. The eighth belt drive assembly and the ninth belt drive assembly are arranged opposite each other and convey the workpiece.

[0009] Furthermore, as described above, the seventh lead screw mechanism includes a seventh motor, which drives a synchronous belt transmission assembly via a reducer. The synchronous belt transmission assembly includes two synchronous pulleys and a synchronous belt. The two synchronous pulleys are coaxially connected to the two seventh lead screws, respectively. A seventh nut seat is connected to the seventh lead screw, and a movable plate is mounted on the seventh nut seat and fixed to the seventh slider. The seventh slider is slidably mounted on the seventh linear guide rail. Both the seventh motor and the seventh linear guide rail are fixed to the frame.

[0010] Furthermore, as described above, both the eighth and ninth belt drive assemblies consist of a belt and several pulleys. The eighth belt drive assembly drives a pulley to rotate via a reducer through an eighth motor mounted on a movable plate, and the ninth belt drive assembly drives a pulley to rotate via a reducer through a ninth motor mounted on a fixed plate.

[0011] Furthermore, as described above, limit plates are installed on both the movable plate and the fixed plate. One end of the limit plate is suspended above the belt, and the other end of the limit plate is connected to a lifting adjustment component. Two lifting adjustment components are respectively installed on the movable plate and the fixed plate. Two lifting baffles are also installed on the fixed plate.

[0012] Furthermore, as described above, the upper laser is fixed on the third slider, the third slider is slidably mounted on the third linear guide rail, the third linear guide rail is fixed on the first lifting plate, the first lifting plate is equipped with a third lead screw, the third lead screw is provided with a third nut seat, the third nut seat is connected to the housing of the upper laser, and the end of the third lead screw is connected to an adjusting handwheel.

[0013] Furthermore, as described above, the first lifting plate is mounted on the second nut seat and the second slider. The second nut seat is fitted onto the second lead screw, and the second slider is slidably mounted on the second linear guide rail. Both the second lead screw and the second linear guide rail are mounted on the first moving plate, and a second motor that drives the second lead screw at reduced speed is fixed on the first moving plate. The first moving plate is mounted on the first nut seat and the first slider. The first nut seat is fitted onto the first lead screw, and the first slider is slidably mounted on the first linear guide rail. Both the first lead screw and the first linear guide rail are mounted on the first mounting plate, and a first motor that drives the first lead screw at reduced speed is fixed on the first mounting plate. The first mounting plate is fixed on the frame.

[0014] Furthermore, as described above, the lower laser is fixed on the sixth slider, the sixth slider is slidably mounted on the sixth linear guide rail, the sixth linear guide rail is fixed on the second lifting plate, the second lifting plate is equipped with a sixth lead screw, the sixth lead screw is provided with a sixth nut seat, the sixth nut seat is connected to the housing of the lower laser, and the end of the sixth lead screw is connected to the lower adjusting handwheel.

[0015] Furthermore, as described above, the second lifting plate is installed on the fifth nut seat and the fifth slider. The fifth nut seat is fitted onto the fifth lead screw, and the fifth slider is slidably mounted on the fifth linear guide rail. Both the fifth lead screw and the fifth linear guide rail are installed on the second moving plate, and a fifth motor that drives the fifth lead screw at reduced speed is fixed on the second moving plate. The second moving plate is also installed on the fourth nut seat and the fourth slider. The fourth nut seat is fitted onto the fourth lead screw, and the fourth slider is slidably mounted on the fourth linear guide rail. Both the fourth lead screw and the fourth linear guide rail are installed on the second mounting plate, and a fourth motor that drives the fourth lead screw at reduced speed is fixed on the second mounting plate. The second mounting plate is fixed to the frame.

[0016] Furthermore, as described above, a controller is also installed on the rack, and the controller is communicatively connected to the upper laser and the lower laser.

[0017] Compared with the prior art, the beneficial effects of this utility model are: this device can adapt to the conveying of workpieces of different sizes and the simultaneous double-sided laser marking operation, resulting in high production efficiency. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present utility model;

[0019] Figure 2 This is an exploded view of the present invention;

[0020] Figure 3 This is a schematic diagram of the adjustable width conveyor track of this utility model;

[0021] Figure 4 This is a schematic diagram of the coding mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the coding mechanism of this utility model.

[0023] In the diagram: 1. Adjustable width conveyor track; 110. Seventh linear guide rail; 111. Seventh slider; 112. Seventh nut seat; 113. Synchronous belt drive assembly; 114. Seventh motor; 12. Movable plate; 13. Fixed plate; 14. Eighth motor; 15. Ninth motor; 16. Eighth belt drive assembly; 17. Ninth belt drive assembly; 18. Lifting adjustment component; 19. Limiting plate; 2. Upper coding mechanism; 20. First mounting plate; 21. Upper X-axis linear movement assembly; 211. First linear guide rail; 212. First slider; 213. First motor; 214. First lead screw; 22. Upper Y-axis linear movement assembly; 220. First moving plate; 2 21. Second linear guide rail; 222. Second slider; 223. Second motor; 224. Second lead screw; 23. Upper Z-axis linear motion assembly; 230. First lifting plate; 231. Third linear guide rail; 232. Third slider; 233. Upper adjusting handwheel; 234. Third lead screw; 24. Upper laser; 25. Upper galvanometer; 26. Upper industrial camera; 27. Upper field lens; 3. Lower coding mechanism; 30. Second mounting plate; 31. Lower X-axis linear motion assembly; 32. Lower Y-axis linear motion assembly; 33. Lower Z-axis linear motion assembly; 34. Lower laser; 35. Lower galvanometer; 36. Lower industrial camera; 37. Lower field lens; 4. Frame; 5. Controller. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," "set," etc., should be interpreted broadly. For example, when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "installed" on another element, it can be directly installed on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within the two elements.

[0026] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Reference Figure 1-5 As shown, this utility model discloses a device for synchronous laser marking on the upper and lower surfaces of a workpiece, comprising a frame 4. From top to bottom, the frame 4 is equipped with an upper marking mechanism 2, an adjustable width conveyor track 1, and a lower marking mechanism 3. The adjustable width conveyor track 1 is used to adjust the width to convey workpieces of different sizes. The upper marking mechanism 2 is used to perform marking operations on the upper surface of the workpiece. The upper marking mechanism 2 includes an upper X-axis linear motion component 21, an upper Y-axis linear motion component 22, and an upper Z-axis linear motion component 23. The upper Y-axis linear motion component 22 is mounted on the upper X-axis linear motion component 21, allowing it to move linearly along the X-axis. The upper Z-axis linear motion component 23 is mounted on the upper Y-axis linear motion component 22, allowing it to move linearly along the Y-axis. An upper laser 24 is mounted on the upper Z-axis linear motion component 23, enabling the upper laser 24 to perform high-speed laser marking in the Z-axis direction. The upper laser 24 is used to adjust the distance between itself and the upper surface of the workpiece. An upper galvanometer 25, an upper industrial camera 26, and an upper field lens 27 are mounted at the front end of the upper laser 24. The upper industrial camera 26 and the upper field lens 27 are arranged side-by-side and face the workpiece. The lower marking mechanism 3 is used to mark the lower surface of the workpiece. The lower marking mechanism 3 includes a lower X-axis linear motion component 31, a lower Y-axis linear motion component 32, and a lower Z-axis linear motion component 33. Each component of the lower marking mechanism 3 performs the same function as the corresponding component of the upper marking mechanism 2, and will not be described in detail here. The lower Y-axis linear motion component 32 is located below the lower X-axis linear motion component 31, and the lower Z-axis linear motion component 33 is mounted below the lower Y-axis linear motion component 32. The lower laser 34 is located below the lower Z-axis linear motion component 33. A lower galvanometer 35, a lower industrial camera 36, ​​and a lower field lens 37 are mounted at the front end of the lower laser 34. The lower industrial camera 36 and the lower field lens 37 are arranged side-by-side and face the workpiece.

[0030] Example 2

[0031] Reference Figure 1-5As shown, based on the technical solution of Embodiment 1, a device for synchronous laser marking on the upper and lower surfaces of a workpiece is provided, combined with... Figure 1 As can be seen from body 3, the adjustable width conveying track 1 includes a fixed part and a movable part with the same structure. The movable part includes a movable plate 12 and an eighth belt drive assembly 16 mounted on the movable plate 12. The movable plate 12 is driven by a seventh screw mechanism to move closer to or away from the fixed part. The fixed part includes a fixed plate 13 and a ninth belt drive assembly 17 mounted on the fixed plate 13. The eighth belt drive assembly 16 and the ninth belt drive assembly 17 are arranged opposite to each other and convey the workpiece together through two sets of belts. The seventh lead screw mechanism includes a seventh motor 114, which drives a synchronous belt transmission assembly 113 via a reducer. The synchronous belt transmission assembly 113 includes two synchronous pulleys and a synchronous belt sleeved on the pulleys. The two pulleys are coaxially connected to the two seventh lead screws. A seventh nut seat 112 is connected to the seventh lead screw. A movable plate 12 is mounted on the seventh nut seat 112 and fixed to the seventh slider 111. The seventh slider 111 is slidably mounted on the seventh linear guide rail 110. The axial direction of the seventh lead screw is parallel to the sliding direction of the seventh slider 111, ensuring that the movable plate 12 moves in a straight line. The seventh motor 114 and the seventh linear guide rail 110 are both fixed on the frame 4.

[0032] Furthermore, both the eighth belt drive assembly 16 and the ninth belt drive assembly 17 consist of a belt and several pulleys. The eighth belt drive assembly 16 drives one pulley to rotate via a reducer through an eighth motor 14 mounted on the movable plate 12. The ninth belt drive assembly 17 drives one pulley to rotate via a reducer through a ninth motor 15 mounted on the fixed plate 13. The two pulleys are located above the movable plate 12 or the fixed plate 13 and at the same height, so that the area above the belt can be used to provide power for horizontally conveying the workpiece and to ensure the conveying direction. In addition, limit plates 19 are installed on both the movable plate 12 and the fixed plate 13. One end of the limit plate 19 is suspended above the belt and parallel to the direction of the two belt conveying workpieces. The other end of the limit plate 19 is connected to a lifting adjustment component 18, which is a bolt and nut threaded connection component used to manually fine adjust the installation height of the limit plate 19, thereby limiting the longitudinal offset of the workpieces conveyed on the two belts. The two lifting adjustment components 18 are respectively installed on the movable plate 12 and the fixed plate 13. Two cylinder-driven lifting baffles are also installed on the fixed plate 13, specifically located inside the fixed plate 13 and not marked with component numbers in the figure. One is used to block the workpiece with marking from the previous station to avoid interfering with the workpiece that needs to be marked, and the other is used to block the workpiece that needs to be marked, restricting its horizontal movement, ensuring that the position of the workpiece remains stable when marking is performed simultaneously from above and below, so that the marking position is accurate.

[0033] Example 3

[0034] Reference Figure 1-5 As shown, based on the technical solution of the above embodiments, a device for synchronous laser marking on the upper and lower surfaces of a workpiece is provided, such as... Figure 4 It is known that the upper laser 24 is fixed on the third slider 232, the third slider 232 is slidably disposed on the third linear guide rail 231, the third linear guide rail 231 is fixed on the first lifting plate 230, the first lifting plate 230 is equipped with a third lead screw 234, the third lead screw 234 is provided with a third nut seat, the third nut seat is connected to the housing of the upper laser 24, and the end of the third lead screw 234 is connected to the upper adjusting handwheel 233. By manually rotating the upper adjusting handwheel 233, the third lead screw 234 is driven to rotate, thereby causing the third nut seat to move linearly up and down, thereby driving the upper laser 24 to adjust the height difference between the upper surface of the conveyed workpiece and the overall adjustment. Furthermore, the first lifting plate 230 is mounted on the second nut seat and the second slider 222. The first lifting plate 230 is horizontally adjusted in the Y-axis direction using a screw mechanism. The second nut seat is fitted onto the second screw 224. The second slider 222 is slidably mounted on the second linear guide 221. The second screw 224 and the second linear guide 221 are both mounted on the first moving plate 220. A second motor 223 that drives the second screw 224 at reduced speed is fixed on the first moving plate 220. The first moving plate 220 is mounted on the first nut seat and the first slider 212. The first moving plate 220 is horizontally adjusted in the X-axis direction using a screw mechanism. The first nut seat is fitted onto the first screw 214. The first slider 212 is slidably mounted on the first linear guide 211. The first screw 214 and the first linear guide 211 are both mounted on the first mounting plate 20. A first motor 213 that drives the first screw 214 at reduced speed is fixed on the first mounting plate 20. The first mounting plate 20 is fixed on the frame 4.

[0035] like Figure 5Specifically, the lower laser 34 is fixed on the sixth slider, which is slidably mounted on the sixth linear guide rail. The sixth linear guide rail is fixed on the second lifting plate, and a sixth lead screw is mounted on the second lifting plate. A sixth nut seat is provided on the sixth lead screw, which is connected to the outer shell of the upper laser 34. The end of the sixth lead screw is connected to the lower adjusting handwheel. By manually rotating the lower adjusting handwheel, the sixth lead screw is driven to rotate, thereby causing the sixth nut seat to move linearly up and down, which in turn drives the lower laser 34 to adjust the distance between itself and the lower surface of the conveyed workpiece. Furthermore, the second lifting plate is mounted on the fifth nut seat and the fifth slider. A screw mechanism is used to adjust the horizontal position of the second lifting plate in the Y-axis direction. The fifth nut seat is fitted onto the fifth screw, and the fifth slider is slidably mounted on the fifth linear guide rail. Both the fifth screw and the fifth linear guide rail are mounted on the second moving plate, and a fifth motor that drives the fifth screw at reduced speed is fixed on the second moving plate. The second moving plate is also mounted on the fourth nut seat and the fourth slider. A screw mechanism is used to adjust the horizontal position of the second moving plate in the X-axis direction. The fourth nut seat is fitted onto the fourth screw, and the fourth slider is slidably mounted on the fourth linear guide rail. Both the fourth screw and the fourth linear guide rail are mounted on the second mounting plate 30, and a fourth motor that drives the fourth screw at reduced speed is fixed on the second mounting plate 30. The second mounting plate 30 is fixed on the frame 4. The components of the lower laser 34 and the upper laser 24 are identical; the corresponding component numbers are omitted and not labeled.

[0036] Furthermore, a controller 5 is also installed on the frame 4. The controller 5 is connected to the upper laser 24 and the lower laser 34. The controller 5 is generally a microcomputer and also controls the start and stop of each motor. It is a conventional modular control component and will not be described in detail here.

[0037] In this utility model device, the assembly and coordination of the various components, the cylinders, motors and matching reducers and their matching control software are existing technologies or materials, and the relevant technical personnel can directly purchase or order them from the market according to the required product model and specifications.

[0038] All electrical components mentioned in the text are connected to an external main controller and 220V AC mains power or industrial power. The main controller can be a conventional known device such as a computer that plays a control role.

[0039] The above description is merely a preferred embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It is obvious to those skilled in the art that this utility model is not limited to the details of the above embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A device for synchronous laser marking on the upper and lower surfaces of a workpiece, comprising a frame (4), characterized in that, The frame (4) is equipped with an upper marking mechanism (2), an adjustable width conveyor track (1), and a lower marking mechanism (3) from top to bottom. The adjustable width conveyor track (1) is used to adjust the width to convey workpieces of different sizes. The upper marking mechanism (2) includes an upper X-axis linear motion assembly (21), an upper Y-axis linear motion assembly (22), and an upper Z-axis linear motion assembly (23). The upper Y-axis linear motion assembly (22) is mounted on the upper X-axis linear motion assembly (21), and the upper Z-axis linear motion assembly (23) is mounted on the upper Y-axis linear motion assembly (22). The upper Z-axis linear motion assembly (23) is mounted on the upper Z-axis linear motion assembly (23), and the upper laser (24) is mounted on the upper Z-axis linear motion assembly (23). The upper galvanometer (25) and the upper industrial camera (26) are mounted at the front end of the upper laser (24). 6) The upper field mirror (27), the upper industrial camera (26) and the upper field mirror (27) are arranged side by side and face the workpiece; the lower marking mechanism (3) includes a lower X-axis linear motion component (31), a lower Y-axis linear motion component (32) and a lower Z-axis linear motion component (33), the lower Y-axis linear motion component (32) is arranged below the lower X-axis linear motion component (31), the lower Z-axis linear motion component (33) is installed below the lower Y-axis linear motion component (32), the lower laser (34) is arranged below the lower Z-axis linear motion component (33), the lower galvanometer (35), the lower industrial camera (36) and the lower field mirror (37) are installed at the front end of the lower laser (34), the lower industrial camera (36) and the lower field mirror (37) are arranged side by side and face the workpiece.

2. The device for synchronous laser marking on the upper and lower surfaces of a workpiece according to claim 1, characterized in that, The adjustable width conveying track (1) includes a fixed part and a movable part with the same structure. The movable part includes a movable plate (12) and an eighth belt drive assembly (16) mounted on the movable plate (12). The movable plate (12) is driven by a seventh screw mechanism to move closer to or away from the fixed part. The fixed part includes a fixed plate (13) and a ninth belt drive assembly (17) mounted on the fixed plate (13). The eighth belt drive assembly (16) and the ninth belt drive assembly (17) are arranged opposite to each other and convey the workpiece.

3. The device for synchronous laser marking on the upper and lower surfaces of a workpiece according to claim 2, characterized in that, The seventh lead screw mechanism includes a seventh motor (114), which drives a synchronous belt transmission assembly (113) through a reducer. The synchronous belt transmission assembly (113) includes two synchronous pulleys and a synchronous belt. The two synchronous pulleys are coaxially connected to the two seventh lead screws respectively. A seventh nut seat (112) is connected to the seventh lead screw. A movable plate (12) is installed on the seventh nut seat (112) and fixed on the seventh slider (111). The seventh slider (111) is slidably set on the seventh linear guide (110). The seventh motor (114) and the seventh linear guide (110) are both fixed on the frame (4).

4. The device for synchronous laser marking on the upper and lower surfaces of a workpiece according to claim 3, characterized in that, The eighth belt drive assembly (16) and the ninth belt drive assembly (17) are both composed of belts and several pulleys. The eighth belt drive assembly (16) is driven by an eighth motor (14) mounted on the movable plate (12) via a reducer to rotate a pulley. The ninth belt drive assembly (17) is driven by a ninth motor (15) mounted on the fixed plate (13) via a reducer to rotate a pulley.

5. The device for synchronous laser marking on the upper and lower surfaces of a workpiece according to claim 4, characterized in that, Limiting plates (19) are installed on both the movable plate (12) and the fixed plate (13). One end of the limiting plate (19) is suspended above the belt, and the other end of the limiting plate (19) is connected to the lifting adjustment component (18). The two lifting adjustment components (18) are respectively installed on the movable plate (12) and the fixed plate (13). Two lifting baffles are also installed on the fixed plate (13).

6. The device for synchronous laser marking on the upper and lower surfaces of a workpiece according to claim 1, characterized in that, The upper laser (24) is fixed on the third slider (232), the third slider (232) is slidably set on the third linear guide (231), the third linear guide (231) is fixed on the first lifting plate (230), the first lifting plate (230) is equipped with a third lead screw (234), the third lead screw (234) is provided with a third nut seat, the third nut seat is connected to the housing of the upper laser (24), and the end of the third lead screw (234) is connected to the adjusting handwheel (233).

7. The device for synchronous laser marking on the upper and lower surfaces of a workpiece according to claim 6, characterized in that, The first lifting plate (230) is mounted on the second nut seat and the second slider (222). The second nut seat is fitted onto the second lead screw (224). The second slider (222) is slidably mounted on the second linear guide rail (221). The second lead screw (224) and the second linear guide rail (221) are both mounted on the first moving plate (220). A second motor (223) for speed reduction driving the second lead screw (224) is fixed on the first moving plate (220). (220) is installed on the first nut seat and the first slider (212). The first nut seat is fitted on the first lead screw (214). The first slider (212) is slidably set on the first linear guide (211). The first lead screw (214) and the first linear guide (211) are both installed on the first mounting plate (20). The first motor (213) that drives the first lead screw (214) to reduce speed is fixed on the first mounting plate (20). The first mounting plate (20) is fixed on the frame (4).

8. The device for synchronous laser marking on the upper and lower surfaces of a workpiece according to claim 1, characterized in that, The lower laser (34) is fixed on the sixth slider, the sixth slider is slidably set on the sixth linear guide rail, the sixth linear guide rail is fixed on the second lifting plate, the second lifting plate is equipped with the sixth lead screw, the sixth lead screw is provided with the sixth nut seat, the sixth nut seat is connected to the housing of the lower laser (34), and the end of the sixth lead screw is connected to the lower adjustment handwheel.

9. The device for synchronous laser marking on the upper and lower surfaces of a workpiece according to claim 8, characterized in that, The second lifting plate is installed on the fifth nut seat and the fifth slider. The fifth nut seat is fitted on the fifth lead screw. The fifth slider is slidably set on the fifth linear guide rail. The fifth lead screw and the fifth linear guide rail are both installed on the second moving plate. The second moving plate is fixed with a fifth motor that drives the fifth lead screw at reduced speed. The second moving plate is installed on the fourth nut seat and the fourth slider. The fourth nut seat is fitted on the fourth lead screw. The fourth slider is slidably set on the fourth linear guide rail. The fourth lead screw and the fourth linear guide rail are both installed on the second mounting plate (30). The second mounting plate (30) is fixed with a fourth motor that drives the fourth lead screw at reduced speed. The second mounting plate (30) is fixed on the frame (4).

10. A device for synchronous laser marking on the upper and lower surfaces of a workpiece according to any one of claims 1-9, characterized in that, The frame (4) is also equipped with a controller (5), which is communicatively connected to the upper laser (24) and the lower laser (34).

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