Automatic focusing mechanism of laser marking machine

Abstract

The utility model discloses an automatic focusing mechanism of a laser marking machine, which comprises a working table, a main controller is arranged at the top of the working table, a coarse adjustment mechanism is arranged above the working table, a fine adjustment mechanism is arranged on the coarse adjustment mechanism, a laser marking head is arranged on the fine adjustment mechanism, and the laser marking head is connected with the main controller. A first distance measuring sensor is mounted on one side of the laser marking head; the utility model relates to the technical field of laser marking machines. According to the automatic focusing mechanism of the laser marking machine, the coarse adjusting mechanism and the fine adjusting mechanism are matched for use, the position of the laser marking head can be adjusted, automatic focusing of the laser marking head is facilitated, meanwhile, the laser marking head can be driven to move rapidly through the coarse adjusting mechanism when the laser marking machine faces workpieces with large height differences, and the automatic focusing efficiency of the laser marking machine is improved. And after the laser marking device moves to a proper position, the position of the laser marking device is finely adjusted through the fine adjusting mechanism, so that the automatic focusing efficiency is improved, and the marking efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser marking machines, in particular to an automatic focusing mechanism of a laser marking machine. Background Technique

[0002] A laser marking machine uses a laser beam to make permanent marks on the surfaces of various different substances. The marking effect is achieved by evaporating the surface layer material to expose the deeper layer material, thereby engraving delicate patterns, trademarks, and characters. Laser marking machines are mainly divided into CO2 laser marking machines, semiconductor laser marking machines, fiber laser marking machines, and YAG laser marking machines. Laser marking machines are mainly applied to some occasions with higher precision requirements. They are applied to electronic components, integrated circuits (ICs), electrical appliances, mobile phone communications, hardware products, tool accessories, precision instruments, glasses and watches, jewelry, automotive parts, plastic buttons, building materials, and PVC pipes.

[0003] The authorized announcement number CN 215966893 U discloses a laser marking machine with an automatic focusing function, which relates to a laser marking machine, including a laser marking machine body, a workbench and a marking head installed thereon. Support feet are fixedly connected to the four corners of the lower surface of the laser marking machine body, and a plurality of groups of evenly distributed wire management mechanisms are fixedly connected to the rear end face of the laser marking machine body. Its utility model is provided with a leveling mechanism. We rotate the rotating handle, which drives the internal thread sleeve to rotate, and then the workbench will be slightly tilted through the threaded rod, thereby achieving the leveling effect and improving the marking effect on the workpiece. And the device is provided with a cooling box, and substances that can quickly cool the workbench can be added to the cooling box, so as to ensure that the workbench can maintain a suitable working temperature for a long time and improve the overall marking efficiency.

[0004] However, the device has the following deficiencies. When the device is in use, it can achieve the effect of automatic focusing by actively adjusting the height of the marking head. However, due to the large height differences of some workpieces, the marking head needs to move a long distance during the focusing process. In order to improve the focusing accuracy of the marking head, its moving speed is often slow, which results in a long time required for focusing and affects the overall marking efficiency.

[0005] Therefore, the utility model provides an automatic focusing mechanism of a laser marking machine to solve the above problems. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides an automatic focusing mechanism of a laser marking machine, which solves the above problems.

[0007] To achieve the above objectives, the present utility model is realized through the following technical solutions: An automatic focusing mechanism for a laser marking machine, comprising a workbench, a main controller is installed on the top of the workbench, a coarse adjustment mechanism is arranged above the workbench, a fine adjustment mechanism is arranged on the coarse adjustment mechanism, a laser marking head is installed on the fine adjustment mechanism, and a first distance measuring sensor is installed on one side of the laser marking head;

[0008] The coarse adjustment mechanism includes a fixed box fixedly connected to the top of the workbench, a first servo motor is installed on the workbench, the output shaft of the first servo motor is fixedly connected to a coarse adjustment threaded rod, the top end of the coarse adjustment threaded rod rotates and extends into the fixed box, an installation plate is sleeved on the coarse adjustment threaded rod in a threaded manner, two extension plates are fixedly connected to the top of the installation plate, the tops of the two extension plates both slide and extend outside the fixed box, and the tops of the two extension plates are fixedly connected to the same lifting plate;

[0009] The fine adjustment mechanism includes a fine adjustment bracket arranged on one side of the lifting plate, a second servo motor is installed on the fine adjustment bracket, the output shaft of the second servo motor is fixedly connected to a fine adjustment threaded rod, a moving block is sleeved on the fine adjustment threaded rod in a threaded manner, and one side of the moving block is connected to the laser marking head.

[0010] Preferably, an electric push rod is fixedly installed on the top of the lifting plate, a connecting plate is fixedly connected to the output shaft of the electric push rod, and the connecting plate is fixedly connected to the fine adjustment bracket. By using the electric push rod and the connecting plate in combination, the position of the laser marking head can be horizontally adjusted, which is convenient for marking different positions of the workpiece.

[0011] Preferably, two symmetrically distributed support sleeves are fixedly connected to the top of the lifting plate, two sliding rods are fixedly connected to the connecting plate, and one ends of the two sliding rods respectively slide and extend into the corresponding support sleeves. By using the support sleeves and the sliding rods in combination, the fine adjustment mechanism and the laser marking head can be supported, which is convenient for their smooth movement and improves the working reliability at the same time.

[0012] Preferably, two wear-resistant sleeves are connected through the installation plate, and two anti-deviation plates are fixedly connected in the fixed box. The two anti-deviation plates respectively slide through the corresponding wear-resistant sleeves. By using the wear-resistant sleeves and the anti-deviation plates in combination, the installation plate can be lifted and lowered smoothly, improving the working reliability.

[0013] Preferably, two symmetrically distributed limit through holes are formed in the fine adjustment bracket, side plates are fixedly connected to both sides of the moving block, and the two side plates respectively slide through the corresponding limit through holes. By using the limit through holes and the side plates in combination, the moving block can be limited, making its movement smoother and improving the marking accuracy.

[0014] Preferably, a storage rack is fixedly connected to the top of the workbench, and a plurality of supporting plates are fixedly connected to the storage rack. The plurality of supporting plates are equidistantly distributed. The combined use of the provided storage rack and supporting plates can facilitate the placement of workpieces and facilitate marking them.

[0015] Preferably, a second distance measuring sensor is fixedly connected to an outer wall of one side of the fixed box, a matching plate is fixedly connected to one side of the fine adjustment bracket, and a third distance measuring sensor is fixedly connected to one side of the corresponding side plate. The combined use of the provided second distance measuring sensor and third distance measuring sensor can measure the positions of the lifting plate and the moving block, so as to measure the position of the laser marking head and facilitate the automatic focusing work.

[0016] Beneficial effects

[0017] The utility model provides an automatic focusing mechanism for a laser marking machine. Compared with the prior art, the following beneficial effects are achieved:

[0018] (1) For the automatic focusing mechanism of the laser marking machine, the combined use of the provided coarse adjustment mechanism and fine adjustment mechanism can adjust the position of the laser marking head, thus facilitating its automatic focusing. At the same time, when facing workpieces with large height differences, the coarse adjustment mechanism can drive the laser marking head to move quickly. After it moves to a suitable position, the fine adjustment mechanism is used to finely adjust its position, improving the automatic focusing efficiency and thus accelerating the marking efficiency.

[0019] (2) For the automatic focusing mechanism of the laser marking machine, the combined use of the provided second distance measuring sensor and third distance measuring sensor can measure the positions of the lifting plate and the moving block, so as to measure the position of the laser marking head and facilitate the automatic focusing work. Description of the drawings

[0020] Figure 1 is a three-dimensional external structure diagram of the utility model;

[0021] Figure 2 is a schematic diagram of the back sectional structure of the utility model;

[0022] Figure 3 is a schematic diagram of the internal structure of the coarse adjustment mechanism in the utility model;

[0023] Figure 4 is an assembly drawing related to the fine adjustment mechanism in the utility model.

[0024] In the figure: 1, workbench; 2, main controller; 3, coarse adjustment mechanism; 301, fixed box; 302, first servo motor; 303, coarse adjustment screw rod; 304, mounting plate; 305, extension plate; 306, lifting plate; 4, fine adjustment mechanism; 401, fine adjustment bracket; 402, second servo motor; 403, fine adjustment screw rod; 404, moving block; 5, laser marking head; 6, first distance measuring sensor; 7, electric push rod; 8, connecting plate; 9, support sleeve; 10, sliding rod; 11, wear-resistant sleeve; 12, anti-deviation plate; 13, limiting through hole; 14, side plate; 15, storage rack; 16, support plate; 17, second distance measuring sensor; 18, mating plate; 19, third distance measuring sensor. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment 1:

[0027] Please refer to Figures 1 to 4 , an automatic focusing mechanism of a laser marking machine, including a workbench 1. A main controller 2 is installed on the top of the workbench 1. The main controller 2 is electrically connected to the first servo motor 302, the second servo motor 402, the laser marking head 5, the first distance measuring sensor 6, the electric push rod 7, the second distance measuring sensor 17 and the third distance measuring sensor 19. A coarse adjustment mechanism 3 is arranged above the workbench 1. A fine adjustment mechanism 4 is arranged on the coarse adjustment mechanism 3. A laser marking head 5 is installed on the fine adjustment mechanism 4. A first distance measuring sensor 6 is installed on one side of the laser marking head 5;

[0028] The coarse adjustment mechanism 3 includes a fixed box 301 fixedly connected to the top of the workbench 1. A first servo motor 302 is installed on the workbench 1. The output shaft of the first servo motor 302 is fixedly connected to a coarse adjustment screw rod 303. The pitch of the coarse adjustment screw rod 303 is relatively large. The top end of the coarse adjustment screw rod 303 rotates and extends into the fixed box 301. An installation plate 304 is sleeved on the coarse adjustment screw rod 303 by threads. Two extension plates 305 are fixedly connected to the top of the installation plate 304. The tops of the two extension plates 305 both slide and extend out of the fixed box 301. The tops of the two extension plates 305 are fixedly connected to the same lifting plate 306;

[0029] The fine adjustment mechanism 4 includes a fine adjustment bracket 401 arranged on one side of the lifting plate 306. A second servo motor 402 is installed on the fine adjustment bracket 401. The output shaft of the second servo motor 402 is fixedly connected to a fine adjustment threaded rod 403. The pitch of the fine adjustment threaded rod 403 is relatively small. A moving block 404 is sleeved on the fine adjustment threaded rod 403 through threads. One side of the moving block 404 is connected to the laser marking head 5.

[0030] Embodiment 2:

[0031] Please refer to Figures 1 to 4 , this embodiment provides a technical solution on the basis of Embodiment 1: An electric push rod 7 is fixedly installed on the top of the lifting plate 306. A connecting plate 8 is fixedly connected to the output shaft of the electric push rod 7. The connecting plate 8 is fixedly connected to the fine adjustment bracket 401; two symmetrically distributed support sleeves 9 are fixedly connected to the top of the lifting plate 306. Two sliding rods 10 are fixedly connected to the connecting plate 8. One ends of the two sliding rods 10 respectively slide and extend into the corresponding support sleeves 9; two wear-resistant sleeves 11 are connected through the mounting plate 304. Two anti-deviation plates 12 are fixedly connected in the fixed box 301. The two anti-deviation plates 12 respectively slide through the corresponding wear-resistant sleeves 11; two symmetrically distributed limit through holes 13 are formed in the fine adjustment bracket 401. Side plates 14 are fixedly connected to both sides of the moving block 404. The two side plates 14 respectively slide through the corresponding limit through holes 13; a storage rack 15 is fixedly connected to the top of the workbench 1. A plurality of support plates 16 are fixedly connected to the storage rack 15. The plurality of support plates 16 are equidistantly distributed; a second distance measuring sensor 17 is fixedly connected to the outer wall of one side of the fixed box 301. A matching plate 18 is fixedly connected to one side of the fine adjustment bracket 401. A third distance measuring sensor 19 is fixedly connected to one side of the corresponding side plate 14.

[0032] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0033] Working principle: When in use, when the workpiece to be marked is placed on the storage rack 15, the electric push rod 7 is started. The electric push rod 7 pushes the first distance measuring sensor 6 to move, so that it aligns with the marking area of the workpiece. Subsequently, the first distance measuring sensor 6 can measure the height difference between the laser marking head 5 and the workpiece, and calculate the stroke required for autofocus. When this stroke is relatively large, the first servo motor 302 can be started. The first servo motor 302 drives the mounting plate 304 threadedly connected thereto to move quickly through the coarse adjustment screw rod 303, so that the extension plate 305 pulls the lifting plate 306 to move, thereby enabling coarse adjustment of the position of the laser marking head 5. When the first distance measuring sensor 6 measures that the moving position of the laser marking head 5 is close to the autofocus position, the first servo motor 302 is turned off, and the second servo motor 402 is started. The second servo motor 402 drives the moving block 404 threadedly connected thereto to move through the fine adjustment screw rod 403. The moving block 404 moves slowly, thereby enabling fine adjustment of the position of the laser marking head 5, facilitating its arrival at the autofocus position, improving the focusing accuracy, and simultaneously improving the focusing efficiency.

[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0035] In the description of this article, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "install", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or a connection through an intermediate medium. It can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic focusing mechanism for a laser marking machine, comprising a workbench (1), characterized in that: A main controller (2) is installed on the top of the workbench (1); a coarse adjustment mechanism (3) is arranged above the workbench (1); a fine adjustment mechanism (4) is arranged on the coarse adjustment mechanism (3); a laser marking head (5) is installed on the fine adjustment mechanism (4); and a first distance measuring sensor (6) is installed on one side of the laser marking head (5); The coarse adjustment mechanism (3) comprises a fixed box (301) fixedly connected to the top of the workbench (1); a first servo motor (302) is installed on the workbench (1); an output shaft of the first servo motor (302) is fixedly connected to a coarse adjustment threaded rod (303); the top of the coarse adjustment threaded rod (303) is rotatably extended into the fixed box (301); a mounting plate (304) is threadedly sleeved on the coarse adjustment threaded rod (303); two extension plates (305) are fixedly connected to the top of the mounting plate (304); the tops of the two extension plates (305) are slidably extended to the outside of the fixed box (301); and the tops of the two extension plates (305) are fixedly connected to the same lifting plate (306); The fine adjustment mechanism (4) comprises a fine adjustment bracket (401) arranged on one side of the lifting plate (306); a second servo motor (402) is mounted on the fine adjustment bracket (401); an output shaft of the second servo motor (402) is fixedly connected to a fine adjustment threaded rod (403); a moving block (404) is threadedly sleeved on the fine adjustment threaded rod (403); and one side of the moving block (404) is connected to a laser marking head (5).

2. The automatic focusing mechanism of a laser marking machine according to claim 1, characterized in that: An electric push rod (7) is fixedly mounted on the top of the lifting plate (306), a connecting plate (8) is fixedly connected to the output shaft of the electric push rod (7), and the connecting plate (8) is fixedly connected to the fine-tuning bracket (401).

3. The automatic focusing mechanism of a laser marking machine according to claim 2, characterized in that: The top of the lifting plate (306) is fixedly connected to two symmetrically distributed support sleeves (9), and the connecting plate (8) is fixedly connected to two sliding rods (10), and one end of the two sliding rods (10) respectively slides and extends into the corresponding support sleeves (9).

4. The automatic focusing mechanism of a laser marking machine according to claim 1, characterized in that: Two wear-resistant sleeves (11) are connected through the mounting plate (304), and two anti-deflection plates (12) are fixedly connected in the fixing box (301). The two anti-deflection plates (12) respectively slide through the corresponding wear-resistant sleeves (11).

5. The automatic focusing mechanism of a laser marking machine according to claim 1, characterized in that: The fine-tuning bracket (401) is provided with two symmetrically distributed limiting openings (13), and both sides of the moving block (404) are fixedly connected with side plates (14), and the two side plates (14) slide through the corresponding limiting openings (13) respectively.

6. The automatic focusing mechanism of a laser marking machine according to claim 1, characterized in that: A storage rack (15) is fixedly connected to the top of the workbench (1), and a plurality of support plates (16) are fixedly connected to the storage rack (15), and the plurality of support plates (16) are equidistantly distributed.

7. The automatic focusing mechanism of a laser marking machine according to claim 5, characterized in that: A second distance measuring sensor (17) is fixedly connected to an outer wall of one side of the fixed box (301), a matching plate (18) is fixedly connected to one side of the fine-tuning bracket (401), and a third distance measuring sensor (19) is fixedly connected to one side of the corresponding side plate (14).

Images