A laser direct engraving type metal grating printing machine

Abstract

The utility model discloses a laser direct engraving formula metal grating marking press, including work platform, with the top fixed laser generator of work platform, laser phase adjusting device, optical path reflection structure. The metal article that needs laser grating marking is placed on the work platform, the laser generator sends out laser, and the laser enters laser phase adjusting device after being reflected for many times through the optical path reflection mechanism, the focusing drive arrangement drives laser phase adjusting device to move up and down on Z axle track structure, thereby adjusting the relative distance of laser phase adjusting device and work platform and adjusting the appropriate focal length, and the laser optical path reflection structure enters laser phase adjusting device, and laser phase adjusting device will adjust the phase to laser, and different phase laser marking comes out different grating microstructure, and different grating microstructure will present different color reflection under the irradiation of natural light, and the color effect can keep for a long time, and grating marking is stable.

Description

Technical Field

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

[0002] Currently, the industrial application of lasers for color marking on material surfaces mainly relies on the thermal effect of traditional nanosecond lasers to oxidize the surface of metal materials, forming an oxide film. Specific color patterns are then created by utilizing the color of the oxide and the thin-film interference of the oxide film. However, the color patterns produced by this method are often fixed and monotonous, lacking vibrant colors. This invention provides a device capable of rapid laser grating engraving, producing vibrant and variable colors. Different color effects can be seen from different angles within the same area. The overall device is small in size, simple in structure, and provides stable grating engraving. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a laser direct-etching metal grating engraving machine, including a working platform, a laser generator fixed to the top of the working platform, a laser phase modulation and beam shaping scanning mechanism fixed to the front side of the working platform and capable of moving vertically up and down, and an optical path reflection structure fixed to the left or rear side of the working platform to transmit the laser reflected from the laser generator to the laser phase modulation and beam shaping scanning mechanism. The two ends of the optical path reflection structure face the laser generator and the laser phase modulation and beam shaping scanning mechanism, respectively. The laser phase modulation and beam shaping scanning mechanism includes a Z-axis track structure fixed to the front side of the working platform, a focusing drive device fixed to the Z-axis track structure, and a laser beam phase modulation and beam shaping scanning device that is driven by the focusing drive device. The laser beam phase modulation and beam shaping scanning device is connected to the Z-axis track structure.

[0004] Preferably, a laser direct-etching metal grating engraving machine is characterized in that the working platform includes a horizontal worktable, two columns fixedly connected to the upper side of the horizontal worktable, and a crossbeam connecting the two columns. The laser generator is fixed to the top of the crossbeam, the Z-axis track is fixed to the front side of the crossbeam, the optical path reflection structure is fixed to the left or right side of the crossbeam, a cross-shaped linear motor platform is provided on the horizontal worktable, and the laser beam phase adjustment and shaping scanning device is arranged on the upper side of the cross-shaped linear motor platform.

[0005] Preferably, the laser beam phase modulation and shaping scanning device includes a sliding block connected to the Z-axis track structure and capable of sliding on the Z-axis track structure, a laser beam phase modulation and shaping mechanism fixedly connected to the sliding block, a flange tube seat identical to the laser beam phase modulation and shaping mechanism and fixed to one end of the sliding block, a high-speed reflective beam controller fixed to the flange tube seat, and a laser reflection device one fixed to the other end of the sliding block. The laser reflection device one is structurally connected to the laser beam phase modulation and shaping mechanism and is also connected to the optical path reflection structure.

[0006] Preferably, the laser reflection device includes a reflector fixed to a sliding block and communicating with a laser beam phase control and shaping mechanism, a retractable channel communicating with and fixed to the reflector, and a reflector fixed inside the reflector. The reflector has a through hole communicating with the laser beam phase control and shaping mechanism. The retractable channel is perpendicular to the through hole. The reflector is obliquely disposed at the intersection of the through hole and the retractable channel.

[0007] Preferably, the laser beam phase modulation and shaping mechanism includes a fixed frame fixedly connected to the sliding block, a swing mechanism fixedly connected to the inner bottom of the fixed frame, a drive mechanism fixedly connected to the side of the fixed frame, a lens group 624 fixedly connected to one end of the drive mechanism, and a linear running mechanism fixedly connected to the swing mechanism.

[0008] The beneficial effect of this utility model is that it provides a laser direct-etching metal grating engraving machine. The metal object to be laser-etched is placed on a cross-shaped linear motor platform. The cross-shaped linear motor platform drives the object to be laser-etched to move in the X and Y axis directions, thereby ensuring that the laser emitted by the optional high-speed reflective beam controller can cover most of the horizontal worktable. After multiple reflections by the optical path reflection structure, the laser passes through a retractable channel and enters the reflector. The laser then passes through through hole one, through through hole three, and through lens two, changing the laser divergence angle, causing the laser to diverge, collimate, or converge. Simultaneously, the drive mechanism rotates the lens group. After passing through the lens group, the laser changes the angle between its optical axis and the vibration direction of the incident laser wave's electric field. By precisely controlling this angle, the laser can ultimately obtain a suitable vibration phase of the electric field. The phase is adjusted as desired, and the laser phase adjustment device adjusts the laser phase. Different laser phases imprint different grating microstructures. Under natural light, these different grating microstructures will reflect different colors. Furthermore, after passing through the non-planar mirrors in the lens group, the beam shape is adjusted again, resulting in a laser spot with better beam quality and more uniform energy after focusing. This high-quality laser spot with a specific phase angle forms a stable grating imprint on the metal surface under the action of light wave interference vibration. The color effect can be maintained for a long time, and the overall equipment is small in size with stable grating imprinting. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of a laser direct-engraving metal grating engraving machine according to this utility model.

[0010] Figure 2 This is a partial structural schematic diagram of a laser direct-engraving metal grating engraving machine according to this utility model.

[0011] Figure 3 This is an exploded view of a portion of the structure of a laser direct-engraving metal grating engraving machine according to this utility model from another direction.

[0012] Figure 4 This is a schematic diagram of the laser beam phase control and shaping mechanism of a laser direct-etching metal grating engraving machine according to the present invention. Detailed Implementation

[0013] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0014] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. 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 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 "one," "two," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. It should also be noted in the description of this utility model that, unless otherwise explicitly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] Reference Figures 1 to 4 The present invention is implemented as follows: A laser direct-etching metal grating engraving machine includes a working platform 1, a laser generator 2 fixed to the top of the working platform 1, a laser phase modulation and beam shaping scanning mechanism 3 fixed to the front side of the working platform 1 and capable of moving vertically up and down, and an optical path reflection structure 4 fixed to the left or rear side of the working platform 1 and capable of reflecting and transmitting the laser from the laser generator 2 to the laser phase modulation and beam shaping scanning mechanism 3. The two ends of the optical path reflection structure 4 are respectively oriented towards the laser generator 2 and the laser phase modulation and beam shaping scanning mechanism 3. The laser phase modulation and beam shaping scanning mechanism 3 includes a Z-axis track structure 7 fixed to the front side of the working platform 1, a focusing drive device 5 fixed to the Z-axis track structure 7, and a laser beam phase modulation and beam shaping scanning device 6 connected to the focusing drive device 5. The laser beam phase modulation and beam shaping scanning device 6 is track-connected to the Z-axis track structure 7.

[0016] In application, the object to be laser grating engraved is placed on the working platform 1. The laser generator 2 emits laser light, which is reflected multiple times by the optical path reflection structure 4 before entering the laser beam phase adjustment and shaping scanning device 6. The focusing drive device 5 drives the laser beam phase adjustment and shaping scanning device 6 to move up and down on the Z-axis track structure 7, thereby adjusting the relative distance between the laser beam phase adjustment and shaping scanning device 6 and the working platform 1 to achieve a suitable focal length for laser grating engraving. The laser light path reflection structure 4 leads to the laser beam phase adjustment and shaping scanning device 6, where a high-speed reflective beam controller 64 rotates a specific phase and uniform laser beam by a certain angle, resulting in different areas displaying different brilliant colors. The colors are brilliant and varied, and the effect can be maintained for a long time. The overall equipment is small in size, simple in structure, and provides stable grating engraving.

[0017] Based on the above embodiments, as a further preferred embodiment, the working platform 1 includes a horizontal worktable 11, two columns 12 fixedly connected to the upper side of the horizontal worktable 11, and a crossbeam 13 connecting the two columns 12. The laser generator 2 is fixed to the top of the crossbeam 13, the Z-axis track is fixed to the front side of the crossbeam 13, the optical path reflection structure 4 is fixed to the left or right side of the crossbeam 13, a cross-shaped linear motor platform 111 is provided on the horizontal worktable 11, and the laser beam phase adjustment and shaping scanning device 6 is arranged on the upper side of the cross-shaped linear motor platform 111.

[0018] The object to be laser-etched is placed on a cross-shaped linear motor platform 111. The cross-shaped linear motor platform 111 moves the object to be laser-etched in the X and Y axis directions, thereby ensuring that the laser emitted by the optional high-speed reflective beam controller 64 can cover most of the horizontal worktable 11. The arrangement of the column 12 and the crossbeam 13 allows the laser phase adjustment and beam shaping scanning mechanism 3 to be mounted on the work platform 1, resulting in a simple and compact overall structure.

[0019] Based on the above embodiments, as a further preferred embodiment, the laser beam phase modulation and shaping scanning device 6 includes a sliding block 61 connected to the Z-axis track structure 7 and capable of sliding on the Z-axis track structure 7, a laser beam phase modulation and shaping mechanism 62 fixedly connected to the sliding block 61, a flange tube seat 63 identical to the laser beam phase modulation and shaping mechanism 62 and fixed to one end of the sliding block 61, a high-speed reflective beam controller 64 fixed to the flange tube seat 63, and a laser reflection device 65 fixed to the other end of the sliding block 61. The laser reflection device 65 is structurally connected to the laser beam phase modulation and shaping mechanism 62 and is connected to the optical path reflection structure 4.

[0020] The sliding block 61 is connected to the focusing drive device 5, which in turn drives the sliding block 61, the laser beam phase adjustment and shaping mechanism 62, the flange seat 63, the high-speed reflective beam controller 64, and the laser reflector 65 to move up and down on the Z-axis track 7, thereby adjusting the relative distance between the high-speed reflective beam controller 64, the laser reflector 65 and the working platform 1 to adjust the appropriate focal length.

[0021] Based on the above embodiments, as a further preferred embodiment, the laser reflection device 65 includes a reflector 651 fixed to the sliding block 61 and communicating with the laser beam phase adjustment and shaping mechanism 62, a retractable channel 652 communicating with and fixed to the reflector 651, and a reflector 653 fixed inside the reflector 651. The reflector 651 is provided with a through hole 6511 communicating with the laser beam phase adjustment and shaping mechanism 62. The retractable channel 652 is perpendicular to the through hole 6511. The reflector 653 is inclined at 45° at the intersection of the through hole 6511 and the retractable channel 652, and the reflector 653 faces both the through hole 6511 and the retractable channel 652.

[0022] The laser generator 2 emits a laser beam, which is reflected twice by the optical path reflection structure 4 and then enters the retractable channel 652. When the reflector 651, together with the sliding block 61 and the laser beam phase adjustment and shaping mechanism 62, is driven by the focusing drive device 5 to move up and down on the Z-axis track structure 7, the retractable channel 652 can extend and retract, thus not affecting the optical path. The laser beam passes through the laser optical path reflection structure 4 and enters the reflector 653 through the retractable channel 652. The laser is reflected by the reflector 653 and enters the through hole 6511 in the reflector 651. Then it enters the laser beam phase adjustment and shaping mechanism 62, the flange tube seat 63, and the high-speed reflective beam controller 64 to perform laser marking.

[0023] Based on the above embodiments, as a further preferred embodiment, the laser beam phase modulation and shaping mechanism 62 includes a fixed frame 621 fixedly connected to the sliding block 61, a swing mechanism 622 fixedly connected to the inner bottom of the fixed frame 621, a drive mechanism 623 fixedly connected to the side of the fixed frame 621, a lens group 624 fixedly connected to one end of the drive mechanism 623, and a linear running mechanism 625 fixedly connected to the swing mechanism 622. The fixed frame 621 is provided with a third through hole 6211 communicating with the first through hole 6511.

[0024] After multiple reflections by the optical path reflection structure 4, the laser passes through the retractable channel 652 and enters the reflector 653. The laser then passes through the reflector 653, through the first through hole 6511, and then through the third through hole 6211. After passing through the second lens 625, the laser divergence angle is changed, causing the laser to begin to diverge, collimate, or converge.

[0025] Lens group 624 is a lens group consisting of a non-planar lens and multiple planar lenses, or multiple non-planar lenses and multiple planar lenses. In the lens group 624, one planar lens and another planar or non-planar lens need to be placed with a certain minute gap, so that the light beam can form a certain optical path difference after passing through the lens group, which plays a role in phase delay. At the same time, the driving mechanism 623 drives the lens group 624 to rotate. After the laser passes through the lens group 624, the angle between its optical axis and the vibration direction of the incident laser light wave electric field changes. By precisely controlling this angle, the laser can finally obtain a suitable light wave electric field vibration phase. The phase is adjusted as desired. The laser phase adjustment device will adjust the phase of the laser. Different phase lasers will imprint different grating microstructures. Under natural light, different grating microstructures will reflect different colors. After the light beam passes through the non-planar mirror in the lens group 624, the shape is adjusted again, so that the beam has better beam quality and more uniform energy laser spot after focusing. Such a high-quality laser spot with a specific phase angle forms a stable grating imprint on the metal surface under the action of light wave interference vibration. The color effect can be maintained for a long time, and the overall device is small in size and the grating imprint is stable.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A laser direct-etching metal grating engraving machine, characterized in that: The system includes a working platform (1), a laser generator (2) fixed to the top of the working platform (1), a laser phase modulation and beam shaping scanning mechanism (3) fixed to the front side of the working platform (1) and capable of moving vertically up and down, and an optical path reflection structure (4) fixed to the left or rear side of the working platform (1) to transmit the laser reflection from the laser generator (2) to the laser phase modulation and beam shaping scanning mechanism (3). The two ends of the optical path reflection structure (4) are respectively facing the laser generator (2) and the laser phase modulation and beam shaping scanning mechanism (3). The laser phase modulation and beam shaping scanning mechanism (3) includes a Z-axis track structure (7) fixed to the front side of the working platform (1), a focusing drive device (5) fixed to the Z-axis track structure (7), and a laser beam phase modulation and beam shaping scanning device (6) connected to the focusing drive device (5). The laser beam phase modulation and beam shaping scanning device (6) is connected to the Z-axis track structure (7).

2. The laser direct-etching metal grating engraving machine as described in claim 1, characterized in that: The working platform (1) includes a horizontal worktable (11), two columns (12) fixedly connected to the upper side of the horizontal worktable (11), and a crossbeam (13) connecting the two columns (12). The laser generator (2) is fixed on the top of the crossbeam (13), the Z-axis track is fixed on the front side of the crossbeam (13), the optical path reflection structure (4) is fixed on the left or right side of the crossbeam (13), a cross-shaped linear motor platform (111) is provided on the horizontal worktable (11), and the laser beam phase adjustment and shaping scanning device (6) is set on the upper side of the cross-shaped linear motor platform (111).

3. The laser direct-etching metal grating engraving machine as described in claim 1, characterized in that... The laser beam phase modulation and shaping scanning device (6) includes a sliding block (61) connected to the Z-axis track structure (7) and capable of sliding on the Z-axis track structure (7), a laser beam phase modulation and shaping mechanism (62) fixedly connected to the sliding block (61), a flange tube seat (63) identical to the laser beam phase modulation and shaping mechanism (62) and fixed to one end of the sliding block (61), a high-speed reflective beam controller (64) fixed to the flange tube seat (63), and a laser reflection device (65) fixed to the other end of the sliding block (61). The laser reflection device (65) is structurally connected to the laser beam phase modulation and shaping mechanism (62) and is connected to the optical path reflection structure (4).

4. The laser direct-etching metal grating engraving machine as described in claim 3, characterized in that: The laser reflection device (65) includes a reflector (651) fixed to the sliding block (61) and communicating with the laser beam phase adjustment and shaping mechanism (62), a retractable channel (652) communicating with and fixed to the reflector (651), and a reflector (653) fixed inside the reflector (651). The reflector (651) is provided with a through hole (6511) communicating with the laser beam phase adjustment and shaping mechanism (62). The retractable channel (652) is perpendicular to the through hole (6511). The reflector (653) is inclinedly arranged at the intersection of the through hole (6511) and the retractable channel (652).

5. The laser direct-etching metal grating engraving machine as described in claim 4, characterized in that... The laser beam phase adjustment and shaping mechanism (62) includes a fixed frame (621) fixedly connected to the sliding block (61), a swing mechanism (622) fixedly connected to the inner bottom of the fixed frame (621), a drive mechanism (623) fixedly connected to the side of the fixed frame (621), a lens group (624) fixedly connected to one end of the drive mechanism (623), and a linear running mechanism (625) fixedly connected to the swing mechanism (622).

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