CN107745582B - RGB three primary colors laser color marking system - Google Patents
RGB three primary colors laser color marking system Download PDFInfo
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- CN107745582B CN107745582B CN201711075201.8A CN201711075201A CN107745582B CN 107745582 B CN107745582 B CN 107745582B CN 201711075201 A CN201711075201 A CN 201711075201A CN 107745582 B CN107745582 B CN 107745582B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/475—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material for heating selectively by radiation or ultrasonic waves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The utility model provides a laser color marking system of three primary colors of RGB, the system includes laser instrument, beam expander, speculum, laser focusing mirror, send powder system, red send powder head, green send powder head and blue send powder head, beam expander is settled to the output side of laser instrument, beam expander output side is settled there is the speculum, laser focusing mirror has been settled to the speculum below, laser instrument output light and laser focusing mirror's optical axis mutually perpendicular, send powder system with red send powder head, green send powder head and blue to send the powder head all to be connected, red send powder head, green send powder head, blue send powder head and laser focusing mirror's output side all to be located processing station. The invention provides a laser color marking system of three primary colors of RGB, which is convenient in process debugging and good in repeatability.
Description
Technical Field
The invention belongs to the technical field of laser marking, and relates to a laser color marking system of three primary colors of RGB.
Background
With the rapid development of laser technology in recent years, the application level of the laser technology is gradually increased, the laser technology becomes an indisputable important component part in the current industrial production process, and meanwhile, the excellent performance characteristics are gradually leading the current processing and manufacturing to new steps.
Laser marking is an important application direction for laser applications and plays a significant role in current marking processes. The workpiece is locally irradiated by a focused laser beam with certain intensity according to a given track, so that the surface layer material is melted, vaporized or subjected to color change, and a permanent mark is left. Various characters, symbols and patterns can be printed, and the processed characters can be from millimeter to micrometer in size, so that the laser marking can realize finer marking. Compared with the traditional processes such as traditional printing, electroplating or paint spraying, the laser marking has the advantages of wide application range, no mechanical pressure and mechanical deformation, difficult erasure, modification, scratch resistance, abrasion resistance, fewer working procedures, low cost, no pollution, no corrosion, high processing speed, good processing repeatability, high processing quality, good processing flexibility, capability of performing high-resolution micro marking and the like.
However, laser marking is a processing mode of evaporating surface materials to leak deep materials, marking marks through chemical and physical changes of the surface materials, or burning out partial materials through light energy to mark patterns or characters. For nonmetallic materials, only black or the color of the leaked deep matters can be marked by oxidation, what color the bottom layer marks, and other colors cannot be marked, and the color is usually monochromatic. For partial metal materials such as stainless steel, titanium and the like, although the generated color can be changed to form colorful marks by changing the technological parameters of laser marking, such as laser power, power density, repetition frequency, scanning speed, scanning mode, marking times and the like, a real decorative effect is obtained. However, the metal color printing process cannot be widely applied because the metal color marking effect is sensitive to the laser energy and the environmental factor, so that the process is difficult to debug and the repeatability is poor.
Disclosure of Invention
In order to overcome the defects that the existing laser marking system can only perform monochromatic marking generally, and even if color marking can be performed on certain metal materials, the process debugging is difficult and the repeatability is poor, the invention provides the RGB three-primary-color laser color marking system which has wide application range, convenient process debugging and good repeatability.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a laser color marking system of three primary colors of RGB, the system includes laser instrument, beam expander, speculum, laser focusing mirror, send powder system, red send powder head, green send powder head and blue send powder head, beam expander is settled to the output side of laser instrument, beam expander output side is settled there is the speculum, laser focusing mirror has been settled to the speculum below, laser instrument output light and laser focusing mirror's optical axis mutually perpendicular, send powder system with red send powder head, green send powder head and blue to send the powder head all to be connected, red send powder head, green send powder head, blue send powder head and laser focusing mirror's output side all to be located processing station.
Further, in the processing station, the laser beam output by the laser focusing mirror is taken as a central axis, the red powder feeding heads, the green powder feeding heads and the blue powder feeding heads are uniformly and symmetrically distributed in the circumferential direction of the central axis, and the central line of the powder feeding pipeline is converged at the middle point of the laser beam.
Further, the laser is a semiconductor pump solid laser or a fiber laser with a gain medium of Nd-YAG.
Furthermore, the beam expander adopts a Galileo triple beam expander, the beam expander consists of two lenses, the beam expander comprises an input concave lens and an output convex lens, the input lens transmits a virtual focus light beam to the output lens, and the two surfaces of the two lenses are plated with 1064nm narrow-band antireflection films.
The reflecting mirror adopts a fused quartz substrate, is plated with a 1064nm high-reflection film and is used for reflecting laser transmitted horizontally into a vertical direction for transmission.
The laser focusing lens adopts a plurality of lens groups of fused quartz materials with the focal length of 150 mm.
The powder feeding system adopts a powder feeding device for quantitatively feeding powder by a powder feeding disc, the powder feeding repetition precision is +/-2%, various powder with the granularity of 20-200 mu m can be fed, the rotating speed range of the powder feeding disc is 0-6 r/min, and the powder feeding quantity is continuously adjustable; the pigments of the three primary colors of RGB are respectively arranged in different powder storage cylinders.
The pigment powder is prepared by adding metal oxide into mineral raw materials, and grinding the mixture into powder according to a proportion.
The invention provides a RGB three-primary-color laser color marking system, which adopts mineral raw materials to be added with metal oxide and other chemical components, and the mineral raw materials are matched and ground into powder according to a certain proportion to form red, green and blue pigments. And then the three-color pigment powder is blown into a molten pool formed on the surface of the base material after laser focusing according to a proportion by an automatic powder feeder in the system, and a specific color coating is formed by high-temperature calcination and rapid solidification, so that the laser color marking effect is generated. The system adopts a pollution-free material hyperchromic method, and the color effect is formed on the surface of the substrate by the high-temperature calcined pigment focused by laser, so that the system has the advantages of easiness in color mixing, bright color, stability, difficulty in changing the color due to the influence of conditions such as ambient temperature and humidity, smooth and fine surface, friction resistance, no fading and the like.
The beneficial effects of the invention are mainly shown in the following steps:
1. the pollution-free material hyperchromic method is adopted, and the high-temperature calcination of the pigment is performed through laser focusing, so that a color effect is formed on the surface of the substrate, and the method has the advantages of easiness in color mixing, bright color, stability, difficulty in changing color due to the influence of conditions such as ambient temperature and humidity, smoothness and fineness of the surface, friction resistance, no fading and the like.
2. The red (R), green (G) and blue (B) are adopted to obtain various colors through three-color superposition, any one color can be realized by a group of RGB values, the color selection is various, the laser color marking is realized, and the use is very convenient.
3. Adopting an additive processing system to replace the traditional laser marking material reduction processing, and adopting a brand new processing technology to solve the single-color marking problem that black is marked by oxidation or the color of the evaporated surface layer substance leaks out of the deep layer substance in the traditional marking process; meanwhile, the problems that complicated process parameter debugging is needed for obtaining color laser marking in some metal marking are solved, and the repeatability is poor even if the process is easy to occur. The RGB three-primary-color laser color marking system can enlarge the color laser marking range, is not limited to a plurality of metal materials such as stainless steel, can be used for marking permanent color marks on the surface layers of all materials, can be used for processing materials such as various metals, hard and soft plastics, various hard alloys, ceramics, glass, magnetic tapes, composite materials, silicon and the like, and can be applied in a large range.
4. The metal oxide and other chemical components are added into mineral raw materials and mixed according to a certain proportion, and ground into powder to form the pigment with three colors of red, green and blue. The powder ground into the powder can obtain the required color through high-temperature calcination, and accords with the processing principle that the high temperature generated by high-intensity focused laser leads the material to undergo physical and chemical changes in the laser processing process, so that the processing mode is well matched with the processing technology and the process of laser marking.
5. Three paths of coaxial powder feeding are adopted, the laser beam is taken as a central shaft, three carrier gas powder feeding heads are uniformly and symmetrically distributed in the circumferential direction of the central shaft, and the central line of a powder feeding pipeline is converged at the middle point of the laser beam. The powder feeding device can provide uniform, stable and better-convergence powder beam current, simultaneously control the powder feeding quantity of different powder feeding heads, obtain various colors through the superposition of the powder feeding quantity and the powder feeding quantity, realize the effect of laser color marking, and has the advantages of simple process, high utilization rate of the pigment, good controllability, easy realization of automation and the like.
6. The method adopts the synchronous powder feeding method to add the pigment powder into the laser melting pool, the dilution rate of the cladding layer is small, the interface is in a metallurgical bonding state, the workpiece deformation is small, the machining allowance is small, the cladding layer has no air holes and crack defects, and the cladding layer has excellent wear resistance and corrosion resistance.
7. The workpiece is locally irradiated by a focused laser beam with certain intensity according to a given track, so that the surface material of the workpiece and the pigment are melted together to leave a permanent mark. Various characters, symbols and patterns can be printed, and the processed characters can be from millimeter to micrometer in size, so that the laser marking can realize finer marking. Compared with the traditional processes such as traditional printing, electroplating or paint spraying, the method has the advantages of wide application range, no mechanical pressure or mechanical deformation, difficult erasure, modification, scratch resistance, abrasion resistance, few procedures, low cost, no pollution, no corrosion, high processing speed, good processing repeatability, high processing quality, good processing flexibility, capability of performing high-resolution micro marking and the like.
Drawings
Fig. 1 is a schematic diagram of a laser color marking system for the three primary colors RGB.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a laser color marking system of three primary colors of RGB comprises a laser 1, a beam expander 2, a reflector 3, a laser focusing mirror 4, a powder feeding system 5, a red powder feeding head 6, a green powder feeding head 7, a blue powder feeding head 8 and a workpiece 9.
The laser 1 is a semiconductor pump solid laser with a gain medium of Nd-YAG, the wavelength of the laser is 1064nm, the output power is adjustable, and the laser can also be an optical fiber laser. The laser has the characteristics of low-power pumping, high pumping conversion efficiency, small resonant cavity loss, high frequency conversion efficiency, small volume, long service life and the like, and is suitable for all-weather industrial production and application.
The beam expander 2 adopts a Galileo three-time beam expander, the beam expander consists of two lenses, the lens comprises an input concave lens and an output convex lens, the input lens transmits virtual focus light beams to the output lens, 1064nm narrow-band antireflection films are plated on two surfaces of the two lenses, the light transmittance of infrared light beams is increased, the beam expander converts 1064nm infrared laser beams emitted by the laser 1 into laser spot shapes meeting the laser marking requirement, namely, the laser is collimated, the divergence angle of the laser beam is reduced, and smaller focusing spots and higher power density are obtained.
The laser beam emitted by the laser 1 and transmitted horizontally is reflected by the reflecting mirror 3 and deflected by 90 degrees to form laser beam perpendicular to the workpiece 9. The reflecting mirror adopts a fused quartz substrate, is plated with a 1064nm high-reflection film, has high damage threshold, can reduce the scattering of light reflected by a light path, and is used for reflecting horizontally transmitted laser to be transmitted in a vertical direction.
The laser focusing lens 4 adopts a plurality of lens groups made of fused quartz material with the focal length of 150mm, has high damage threshold and good imaging quality, and can reduce the aberration of a processing system. The parallel laser beams after the laser beam is expanded by the laser focusing mirror 4 with proper multiplying power are focused into a small focal spot. The lens with different focal lengths can be replaced according to the processing requirement, the longer the focal length is, the larger the focal spot is, the lower the power density is, but the focal depth is large, the effective cutting range is large, and the operation tolerance is large.
The powder feeding system 5 adopts a powder feeding device for feeding powder by a powder feeding disc in a quantitative way, the powder feeding repetition precision is +/-2%, various powder with the granularity of 20-200 mu m can be fed, the rotating speed of the powder feeding disc is 0-6 r/min, and the powder feeding quantity is continuously adjustable. The powder feeder adopts a synchronous powder feeding method to add pigment powder into a laser molten pool, the dilution rate of a cladding layer is small, the interface is in a metallurgical bonding state, the workpiece deformation is small, the machining allowance is small, the cladding layer has no air holes and crack defects, and the cladding layer has excellent wear resistance and corrosion resistance. The three pigments of RGB colors are respectively arranged in different powder storage cylinders, powder is conveyed to a workpiece strictly according to a manufacturing process, and the three pigments with different proportions and different weights are accurately conveyed, so that the processing quality of a color laser marking system is ensured, and the color laser marking system has the advantages of good controllability, high material utilization rate, simple technological process and the like.
In the RGB three-primary-color laser color marking system, three paths of coaxial powder feeding are adopted, the laser beam is taken as a central axis, three carrier gas powder feeding heads are uniformly and symmetrically distributed in the circumferential direction of the central axis, and the central line of a powder feeding pipeline is converged at the middle point of the laser beam. The red powder feeding head 6, the green powder feeding head 7 and the blue powder feeding head 8 blow RGB pigment into the focus, the melted pigment spreads on the surface of the base material through high-temperature calcination of laser to form RGB color coatings, various colors are obtained through the change of three colors of red (R), green (G) and blue (B) and the superposition of the three colors, and the laser color marking is realized on the workpiece 9.
The pigment powder is prepared by adding metal oxide and other chemical components into mineral raw materials, and grinding the mixture into powder according to a certain proportion, wherein if the powder contains ferric oxide, copper oxide and cobalt oxide, red, green and blue pigments are respectively formed, and the pigment powder can be subjected to laser calcination at a certain temperature to form the colors of red (R), green (G) and blue (B).
Claims (4)
1. A laser color marking system of three primary colors of RGB is characterized in that: the system comprises a laser, a beam expander, a reflecting mirror, a laser focusing mirror, a powder feeding system, a red powder feeding head, a green powder feeding head and a blue powder feeding head, wherein the beam expander is arranged on the output side of the laser, the reflecting mirror is arranged on the output side of the beam expander, the laser focusing mirror is arranged below the reflecting mirror, the optical axes of the laser output light and the laser focusing mirror are mutually perpendicular, the powder feeding system is connected with the red powder feeding head, the green powder feeding head and the blue powder feeding head, and the output sides of the red powder feeding head, the green powder feeding head, the blue powder feeding head and the laser focusing mirror are all positioned in a processing station;
in the processing station, the laser beam output by the laser focusing mirror is taken as a central shaft, the red powder feeding heads, the green powder feeding heads and the blue powder feeding heads are uniformly and symmetrically distributed in the circumferential direction of the central shaft, and the central line of the powder feeding pipeline is converged at the middle point of the laser beam;
the beam expander adopts a Galileo triple beam expander, and consists of two lenses, wherein the beam expander comprises an input concave lens and an output convex lens, the input lens transmits a virtual focus light beam to the output lens, and the two surfaces of the two lenses are plated with 1064nm narrow-band antireflection films;
the powder feeding system adopts a powder feeding device for quantitatively feeding powder by a powder feeding disc, the powder feeding repetition precision is +/-2%, various powder with the granularity of 20-200 mu m can be fed, the rotating speed range of the powder feeding disc is 0-6 r/min, and the powder feeding quantity is continuously adjustable; the pigments of the three primary colors of RGB are respectively arranged in different powder storage cylinders; the pigment powder is prepared by adding metal oxide into mineral raw materials, and grinding the mixture into powder according to a proportion.
2. The RGB three primary color laser color marking system of claim 1, wherein: the laser is a semiconductor pump solid laser or an optical fiber laser with a gain medium of Nd-YAG.
3. The RGB three primary color laser color marking system of claim 1, wherein: the reflecting mirror adopts a fused quartz substrate, is plated with a 1064nm high-reflection film and is used for reflecting laser transmitted horizontally into a vertical direction for transmission.
4. The RGB three primary color laser color marking system of claim 1, wherein: the laser focusing lens adopts a plurality of lens groups of fused quartz materials with the focal length of 150 mm.
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| CN201711075201.8A CN107745582B (en) | 2017-11-06 | 2017-11-06 | RGB three primary colors laser color marking system |
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| CN109175717A (en) * | 2018-10-17 | 2019-01-11 | 北京航天控制仪器研究所 | A kind of device and method for realizing color metal label |
| CN109693043B (en) * | 2019-02-22 | 2021-07-20 | 深圳市杰普特光电股份有限公司 | Marking method and organic glass |
| CN115447266A (en) * | 2022-09-19 | 2022-12-09 | 浙江宇狮包装材料有限公司 | Motion type color hot stamping equipment and method based on laser transfer printing |
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| DE3731835A1 (en) * | 1987-09-22 | 1989-03-30 | Siemens Ag | LASER BEAM INDUCED COLOR PRINTING |
| US5838361A (en) * | 1996-01-11 | 1998-11-17 | Micron Technology, Inc. | Laser marking techniques |
| FR2744066A1 (en) * | 1996-01-30 | 1997-08-01 | Otis Elevator Co | Method of laser printing on e.g. metal, wood etc. |
| JP2000127506A (en) * | 1998-10-27 | 2000-05-09 | Nkk Corp | Metallic material printer |
| US6864190B2 (en) * | 2002-10-17 | 2005-03-08 | National Research Council Of Canada | Laser chemical fabrication of nanostructures |
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| US20160375523A1 (en) * | 2013-07-02 | 2016-12-29 | Eaton Corporation | Laser cladding with carbide hard particles |
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