Color regulation and control method based on titanium metal surface laser marking coloring

Abstract

The invention provides a color regulation and control method based on titanium metal surface laser marking coloring, and belongs to the technical field of color science, laser marking and structure coloring. The relation between laser output energy and laser parameters and marking parameters and the relation between titanium metal plate structure coloring and laser energy output are established, and the color characteristics of the surface of the titanium metal plate and transfer regulation and control between colors can be estimated through laser marking output energy during multiple times of overlapping marking. By means of laser energy active control and repeated overlapping marking, accurate conversion and regulation of one color to another color on the surface of the titanium metal plate are achieved, and the problems of color coloring and color regulation of the surface of the titanium metal plate are solved. By means of the method, color coloring of the surface of the titanium metal plate and accurate regulation and control of multiple colors can be achieved, the colors are rich and bright, good abrasion resistance is achieved, and good application potential and value are achieved in the fields of laser marking, coloring, decoration, anti-counterfeiting and the like.

Description

Technical Field

[0001] The invention relates to the technical fields of surface micro-nano structure coloring, laser marking and laser energy conversion, and in particular to a color control method based on laser marking and coloring of titanium metal surface. Background Art

[0002] In the past two decades, with the rapid development of new energy technology, new energy technology has gradually been integrated into people's lives due to its excellent pollution-free and low-loss properties. Laser marking is a high-precision, non-contact processing technology that uses a laser beam to mark, etch or process the target surface. It is widely used in industrial production, medical equipment, electronic equipment, jewelry processing and other fields. The development of laser marking technology has benefited from the continuous advancement of lasers, including solid lasers, gas lasers, semiconductor lasers, etc. With the improvement of this technology, the performance, stability and reliability of laser marking systems have been improved. In recent years, researchers have been committed to improving the accuracy and control capabilities of laser marking systems, and realizing precise control of the marking process by optimizing optical systems, motion control systems and signal processing algorithms, thereby improving marking quality and processing efficiency. In addition, with the development of industrial intelligence, laser marking technology is also developing in the direction of intelligence and automation. The intelligent marking system can realize functions such as automatic identification of marking positions, adjustment of parameters, and monitoring of processing processes, thereby improving production efficiency and product consistency. Similarly, people have increasingly higher requirements for the environmental friendliness and energy-saving and emission-reduction effects of laser marking technology. Researchers are currently working on developing low-energy, high-efficiency laser marking systems to reduce their pollution to the environment and consumption of resources.

[0003] Laser marking and coloring technology is a technology that uses laser to produce microstructures or chemical reactions on the surface of materials to achieve coloring of the surface of materials. This technology can be used to form patterns or texts of different colors on the surface of metals, ceramics, plastics and other materials. It has the advantages of high resolution, high efficiency and environmental protection. The principle of coloring mainly includes laser-induced surface structure changes, chemical reactions and optical effects. The current research is mainly to explore the law of color changes of different materials under the action of lasers by reasonably regulating laser parameters, material properties and environmental conditions, so as to provide theoretical support for laser marking and coloring. In addition, since different materials respond differently to laser marking and coloring, relevant research is also needed for different materials. The effect of laser marking and coloring is greatly affected by laser parameters including laser power, pulse width, frequency, etc. By optimizing these parameters, the process of interaction between laser and material is controlled to achieve precise coloring effect. Similarly, unlike traditional chemical dyeing, laser marking and coloring technology has environmental advantages, does not require chemical agents, and reduces pollution to the environment. Therefore, laser marking and coloring technology has broad application prospects in industrial manufacturing, artwork processing, anti-counterfeiting labels and other fields. Researchers are constantly exploring its new application areas and developing coloring technologies and equipment suitable for different industries and fields.

[0004] With the continuous development of laser technology, the use of laser technology to color metal surfaces has become an important topic for current researchers. By adjusting the relevant parameters of the laser, the laser's action mode and intensity on the material are controlled, thereby affecting the color and depth of its coloring. Similarly, different materials will produce different coloring effects under the action of lasers. Selecting suitable materials and properly treating their surfaces can affect the progress and results of the coloring reaction. On the basis of the above operations, the laser energy distribution can be precisely adjusted through the focusing, modulation and scanning control of the light beam, thereby affecting the uniformity and fineness of the coloring results. High-precision beam control technology can ensure the high quality and consistency of the coloring results. Therefore, how to achieve precise control of the color of the laser marking coloring results, including the type, depth, uniformity and other aspects of the color by adjusting laser parameters, material selection, surface treatment and other means, is more worthy of in-depth study.

[0005] At present, although there are many reports on laser marking and coloring on metal surfaces, the color quality, color quantity and type, and color controllability of the obtained marking and coloring are still far from ideal and need further research. This is mainly manifested in: ① The relevant coloring methods are currently mainly through exhausting as many parameter combinations as possible, conducting extensive marking experiments, and then selecting samples with colored effects and recording their marking data. The marking and coloring methods involved are single, cumbersome, and the efficiency of obtaining effective data is poor; ② Marking and coloring rely more on experience, and have not yet formed an effective and feasible coloring and color control method, especially one that can be quantified; ③ The process data obtained by the relevant research institutes are not extensive and generalizable, and the coloring effect is very unstable. Changes in materials, equipment, and other parameters will cause the obtained process data to fail, and the expected coloring and coloring effect cannot be obtained; ④ The color quality of marking and coloring is poor, the color saturation is obviously low, and the sample has color but it does not feel obvious; ⑤ The number of colors achieved by marking is small, and it is mainly concentrated in red, purple, yellow, and orange hues. The types of colors that can be reproduced by different materials vary greatly; ⑥ Marking and coloring mainly rely on exhaustive experimental marking, and the color controllability is very poor. Therefore, laser marking and coloring of material surfaces and color control have become current research hotspots in related fields.

[0006] In order to solve the above problems, the present invention provides a color control method based on laser marking and coloring of titanium metal surface, which controls the energy output of pulsed laser and the spot overlap in the horizontal and vertical directions within the laser single pulse spot area, so that the laser acts on the surface of titanium metal plate and forms a micro-nano structure with a certain depth and fineness and obtains material coloring; then, multiple marking methods can be used to achieve accurate transfer control between the obtained colors, and realize the laser marking and coloring of the surface of titanium metal plate and the accurate and effective regulation between its colors. The material of the laser marking and coloring of the present invention is titanium metal plate, and the coloring of the marking and coloring is rich, bright and has good wear resistance; the surface of the material after coloring forms an oxide layer and a microstructure, and when light is irradiated on the surface of the material, a series of film interference and light diffraction and other phenomena will occur; at the same time, the coloring layer is closely combined with the substrate, and the coloring has good hardness, wear resistance, and corrosion resistance, which effectively prevents oxidation, corrosion, etc. from eroding and destroying the surface of the material, and the service life of the material coloring is long. The present invention provides a method for active control of laser energy and precise regulation of multiple marking colors, which realizes precise and arbitrary regulation among multiple colors of material marking and coloring, solves the problems of poor color quality, irrational number and types of colors, and precise controllability of colors in laser marking on the surface of metal materials, and has great application potential and value in the fields of anti-counterfeiting, decoration, artistic creation, marking, laser and related fields. Summary of the invention

[0007] The purpose of the present invention is to overcome the defects of the existing laser marking and coloring technology, such as the lack of a method for precise color control, poor color quality, small number and variety of colors, etc., and propose a color control method based on laser marking and coloring of titanium metal surface. The method is based on laser marking and coloring of titanium metal plates, and the color of the marking and coloring is rich, bright and has good wear resistance; the precise and effective control between the marking and coloring colors is achieved by energy control and multiple marking, and the problems of color doping, impure colors, insufficient color types and quantities, and precise and effective control between colors in marking and coloring are solved. It is widely used in the fields of laser marking, laser coloring, art painting, decoration and anti-counterfeiting.

[0008] In order to achieve the above object, the present invention provides a technical solution, a color control method based on laser marking and coloring of titanium metal surface, characterized in that the method controls the color by controlling the energy output of the laser, and the method comprises the following steps:

[0009] Step 1: Prepare a titanium metal plate A with a thickness of D, and clean its surface to remove dust and other attachments on the surface of the material;

[0010] Step 2: Use a pulsed laser to perform a first laser marking process on the surface of the metal plate A in step 1 by adjusting the output energy of the pulsed laser, thereby obtaining the basic color M that the metal plate A can achieve. i , i∈[1,m], m is an integer; the laser marking process is achieved by controlling the output energy E of the pulsed laser, Among them, E s =P / f is the laser single pulse output energy, M x =D m f / V is the horizontal overlap of the laser single pulse spot area, M y =D m / D y is the spot overlap of the laser single pulse light spot in the vertical direction, D m is the diameter of the laser spot, f is the repetition frequency of the pulsed laser, V is the scanning speed of the pulsed laser, P is the output power of the laser, and D y is the scanning interval of the pulse laser;

[0011] Step 3: For the basic color Mi described in step 2, any two basic colors within i∈[1,m] are called color M A and color M B The laser output energies are E A and E B And E A ≠E B, and then use the relation

[0012]

[0013] Multiple markings can be performed to achieve color M A To M B The color is precisely controlled, EE1, EE2, and EE3 are the total energy of the laser output when multiple markings are performed using a pulsed laser, and n∈[2, 1000] is the number of multiple markings; the multiple markings are n times of energy output to achieve color coloring using the pulsed laser, and each energy output independently completes a color coloring process on the surface of the titanium metal plate and a heat dissipation time T is left for two adjacent markings, T∈[30s, 2min]; the applicable situation of EE1 is D yn ≤D mn , D y(n-1) ≤D m(n-1) and D y(n-1) ≥D m(n-1) , D yn ≤D mn , the applicable situation of EE2 is D y(n-1) ≤D m(n-1) , D yn ≥D mn , the applicable situation of EE3 is D y(n-1) ≥D m(n-1) , D yn ≥D mn ; M xn =D mn f n / v n 、M yn =D mn / D yn are the spot overlap amounts of the laser single pulse light spot in the horizontal and vertical directions during the nth marking, E si =P i / f i is the laser single pulse output energy during the i-th marking, P i and f i are the laser output power and pulse laser repetition frequency during the i-th marking respectively; D mn , D m(n-1) , D mi are the laser spot diameters for the nth, n-1th, and ith markings, respectively, f n 、f n-1 、f i are the laser output frequencies for the nth, n-1th, and ith markings, respectively, V n 、V n-1 、V iare the laser scanning speeds for the nth, n-1th, and ith markings, respectively, and D yn , D y(n-1) , D yi are the laser scanning intervals during the nth, n-1th, and ith markings, respectively, and D yc =min(D y(n-1) , D yn ) is the minimum laser scanning interval between two adjacent markings, D yd =max(D y(n-1) , D yn ) The maximum laser scanning interval between two adjacent markings, D yc / D yd It indicates the ratio of the overlapping laser spots generated by two adjacent markings to the total number of spots; E1 is the total energy of the overlapping laser spots generated by multiple markings, E2M yn Total energy of non-overlapping laser spots generated for multiple markings.

[0014] Furthermore, the color control method based on laser marking and coloring of titanium metal surface is characterized in that the titanium metal plate described in step 1 is a pure titanium metal plate, a titanium alloy plate, etc., including industrial pure titanium Ta1, Ta2, Ta3 and a-type titanium alloy Ta4, Ta5, Ta6, Ta7, Ta8 and α+β-type titanium alloy Tc1, Tc2, Tc3, Tc4, Tc6, Tc7, Tc9, Tc10, etc.; the thickness D of the metal plate A described in step 1 is D∈[0.5mm, 10cm], and preferably D is D∈[1.0mm, 1cm]; the cleaning treatment described in step 1 is achieved by using cleaning agents such as deionized water, alcohol, hydrochloric acid with a concentration of 1%-3%, sodium hydroxide solution with a concentration of 1%-3%, acetone, etc.; the central wavelength of the pulsed laser described in step 2 is 1062nm, 1064nm, 1053nm, 905nm, 532nm; the output energy E described in step 2 is E∈[0.1KJ / cm 2 , 60KJ / cm 2 ], the preferred E is E∈[0.15KJ / cm 2 , 56KJ / cm 2 ]; P, f, D described in step 2 m , V, D y P∈[1W, 50W], f∈[5KHz, 200KHz], D m ∈[10μm, 5cm], V∈[1mm / s, 10000mm / s], D y ∈[0.01mm, 10cm], preferably P∈[9W, 40W], f∈[20KHz, 100KHz], D m∈[30μm, 100μm], V∈[50mm / s, 3000mm / s], D y ∈[0.03mm, 0.5mm];

[0015] Furthermore, the color control method based on titanium metal surface laser marking and coloring is characterized in that the P in step 3 i 、f i , D mi 、V i , D yi , i∈[1,n], is P i ∈[3W, 50W], f i ∈[10KHz, 200KHz], D mi ∈[10μm, 1cm], V i ∈[1mm / s,3000mm / s], D yi ∈[0.01mm, 1cm], preferably P i ∈[9W, 40W], f i ∈[20KHz, 100KHz], D mi ∈[30μm, 100μm], V i ∈[50mm / s, 3000mm / s], D yi ∈[0.03mm, 0.5mm]; the n described in step 3 is preferably n∈[2, 10].

[0016] Furthermore, the color control method based on titanium metal surface laser marking and coloring is characterized in that m=14 in step 2, and m basic colors M are obtained according to the output of the energy of the pulse laser from large to small. i , i∈[1,m], are black, gray, brown, green, cyan, blue, purple, purple-red, pink, red, orange, brown, yellow, and silvery white, respectively. The total output energy of the pulsed laser used is E i , i∈[1,m], respectively [41KJ / cm 2 , 60KJ / cm 2 ]、[27.68KJ / cm 2 , 41KJ / cm 2 ]、[24.64KJ / cm 2 , 27.68KJ / cm 2 ]、[24KJ / cm 2 , 24.64KJ / cm 2 ]、[22.88KJ / cm 2 , 24KJ / cm 2 ]、[16.62KJ / cm 2, 22.88KJ / cm 2 ]、[11.52KJ / cm 2 , 16.62KJ / cm 2 ]、[11.2KJ / cm 2 , 11.52KJ / cm 2 ]、[10.88KJ / cm 2 , 11.2KJ / cm 2 ]、[9.92KJ / cm 2 , 10.88KJ / cm 2 ]、[7.2KJ / cm 2 , 9.92KJ / cm 2 ]、[5.12KJ / cm 2 , 7.2KJ / cm 2 ]、[1.12KJ / cm 2 , 5.12KJ / cm 2 ]、[0.1KJ / cm 2 , 1.12KJ / cm 2 ], preferably [45KJ / cm 2 , 56KJ / cm 2 ]、[29KJ / cm 2 , 38.2KJ / cm 2 ]、[25.2KJ / cm 2 , 26.8KJ / cm 2 ]、[24.23KJ / cm 2 , 24.6KJ / cm 2 ]、[23KJ / cm 2 , 23.88KJ / cm 2 ]、[19.52KJ / cm 2 , 21.88KJ / cm 2 ]、[13.62KJ / cm 2 , 16.62KJ / cm 2 ]、[11.3KJ / cm 2 , 11.48KJ / cm 2 ]、[11KJ / cm 2 , 11.15KJ / cm 2 ]、[9.92KJ / cm 2 , 10.84KJ / cm 2 ]、[7.34KJ / cm 2 , 9.62KJ / cm 2 ]、[5.42KJ / cm 2 , 7.18KJ / cm 2]、[1.34KJ / cm 2 , 5KJ / cm 2 ]、[0.62KJ / cm 2 , 1.08KJ / cm 2 ].

[0017] Furthermore, the color control method based on titanium metal surface laser marking and coloring is characterized in that the color M in step 3 A To M B The precise color control is to first calculate the color M using the relationship EE1, EE2, EE3 B The total output energy EE of the pulsed laser is required, and then the energy EEi is output respectively by the n-time marking method, i∈[1,n], The color control method achieves the energy output of the pulse laser marking at that time by adjusting the relevant parameters of each laser marking, and the relevant parameters are all the parameters in the relationship formulas EE1, EE2, and EE3; by reasonably designing and adjusting the marking parameters of the pulse laser at each time, the color change of the surface of the titanium metal plate after multiple laser markings can be estimated by the output energy of each marking of the pulse laser, and the precise transformation control from one color to another color on the surface of the titanium metal plate can be achieved, thereby solving a series of problems of color coloring and color control on the surface of the titanium metal plate; the energy E in step 2 and the relationship in step 3 Formulas EE1, EE2, and EE3 can be used for pulsed laser marking of various wavelengths. The given pulsed laser parameters, laser marking parameters, and the energy range of each pulsed laser marking can be used for surface coloring and color control of commercially available titanium plates, thereby achieving precise conversion and control of the colors on the surface of the titanium plates. The color control method achieves coloring and color control of the titanium surface by regulating the total output energy of the pulsed laser, thereby effectively solving the problem of deformation of the metal plate and color quality caused by excessively high surface temperature of the titanium plate when a large number of markings are performed, and the obtained color has good quality, bright colors, and a wide range of applications.

[0018] The color control method based on laser marking and coloring of titanium metal surface provided by the present invention also has the following characteristics:

[0019] 1. The color control method provided by the present invention calculates the energy output of the pulsed laser through a mathematical formula, and estimates the change in the color of the titanium metal surface based on the calculated energy output value. It can be used to achieve precise control of the transformation of a certain color to another color on the surface of the titanium metal plate, and has a wide range of applications.

[0020] 2. If the pulse laser energy output value EE of the present invention is equal to the critical pulse laser energy value EE0 for ablation of the titanium metal surface, then during laser marking, microstructures and coloring will be generated on the titanium metal surface only when the output value EE is greater than the critical value EE0.

[0021] 3. The present invention proposes energy relationship formulas EE1, EE2, and EE3. When in use, it is necessary to estimate the number of times n required for multiple markings based on the difference in the energy value range of the original color block and the target color block, where n≥2, and then select the corresponding relationship formula based on the change in the laser scanning interval to perform multiple markings and calculate the output energy of each pulse laser, ultimately realizing the mutual conversion between the surface colors of the titanium metal plate and achieving the goal of precise color control.

[0022] 4. When using the energy superposition calculation formulas EE1, EE2, and EE3 provided by the present invention, it is necessary to pay attention to the change in the pulse laser scanning interval value between two adjacent markings. According to the change in the scanning interval, a suitable energy calculation formula is selected to calculate the pulse laser energy value in sequence, so that the transformation of a certain color to the target color can be achieved while ensuring the excellent color quality of the laser marking.

[0023] 5. The color control method described in the present invention can be applied to the reproduction of artistic paintings; the energy value difference between the existing color block and the target color block is determined by using a relationship, and the number of markings n required is estimated, where n ≥ 2; then the pulse laser parameters for each of the n markings are set so that the original color M1 is converted into the target color M2; the color superposition method is used to reduce the workload of frequently extracting a single color area, and a replica painting with brighter colors can be obtained.

[0024] 6. According to the present invention, when the scanning interval Dm of the pulse laser is set to be ≤30μm, a higher temperature will be generated on the surface of the pure titanium metal plate during laser marking, and the higher temperature will cause the pure titanium metal plate to bend and deform, affecting the quality of the generated color; in order to solve this problem well, the scanning interval value of the pulse laser can be appropriately increased, that is, Dm≥30μm, and an interval time is left between two adjacent markings to ensure that the heat generated during marking can be well diffused into the air.

[0025] 7. The titanium metal plate described in the present invention is a plate sold on the market. The plate can be cleaned with deionized water or the like before use to ensure the color quality of laser marking and coloring; the color control method described has great application potential and value in structural color development, anti-counterfeiting, decoration, laser marking, laser coloring, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the first light spot overlapping situation to which the relational expression EE1 described in the present invention is applicable.

[0027] Figure 2 This is the second light spot overlapping situation to which the relational expression EE1 described in the present invention is applicable.

[0028] Figure 3 This is the spot overlap situation to which the relational expression EE2 described in the present invention is applicable.

[0029] Figure 4 This is the spot overlap situation to which the relational expression EE3 described in the present invention is applicable.

[0030] Figure 5 This is a photo of 14 basic colors of Example 1 of the present invention.

[0031] Figure 6 is the basic color M of the first embodiment of the present invention A and basic color M B Photos. DETAILED DESCRIPTION

[0032] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are only used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] Figure 1 and Figure 2 The two overlapping situations of the laser spots to which the relational expression EE1 provided by the present invention is applicable are D yn ≤D mn , D y(n-1) ≤D m(n-1) and D y(n-1) ≥D m(n-1) , D yn ≤D mn ; Figure 3 and Figure 4 The overlapping conditions of the laser spots to which the relational expressions EE2 and EE3 provided in the present invention are applicable are respectively D y(n-1) ≤D m(n-1) , D yn ≥D mn and D y(n-1) ≥D m(n-1) , D yn ≥D mn . Combined with the technical solution provided by the present invention, a color control method based on laser marking and coloring of titanium metal surface can use pulsed laser to mark and color the surface of titanium metal plate and realize precise control between any colors of marking and coloring, thus solving the problems of poor color quality, insufficient color types and quantity, and precise control between coloring colors in current marking and coloring. The following embodiments provided by the present invention are based on Figure 1-4And the technical solution provided by the present invention is implemented, and the specific embodiments are as follows:

[0034] Embodiment 1:

[0035] Step 1: Purchase a Ta1 pure titanium metal plate with a thickness of D=1 mm, namely the titanium metal plate A, from the market, and clean its surface with deionized water to remove dust and other attachments on the surface of the material.

[0036] Step 2: Use a pulsed laser with a central wavelength of 1062nm to perform a single (first) laser marking process by adjusting the laser parameters and marking parameters including output power P, output frequency f, marking speed V, spot diameter Dm, scanning interval Dy, focal length ff of the pulsed laser, etc., and control the total output energy E of the pulsed laser to E s ×M x ×M y On the surface of the titanium metal plate Ta1, m=14 basic marking colors Mi, i∈[1,m] are obtained, which are black, gray, brown, green, cyan, blue, purple, purple-red, pink, red, orange, brown, yellow, and silvery white, respectively. Figure 5 As shown, the relevant parameters {P, f, Dm, V, Dy, E} used are {P = 36W, f = 90KHz, Dm = 0.01mm, V = 20mm / s, Dy = 0.04mm, E = 50.62KJ / cm 2}, {P=32W, f=80KHz, Dm=0.04mm, V=80mm / s, Dy=0.04mm, E=40KJ / cm 2}, {P=30W, f=60KHz, Dm=0.03mm, V=100mm / s, Dy=0.025mm, E=25.92KJ / cm 2}, {P=30W, f=90KHz, Dm=0.03mm, V=120mm / s, Dy=0.025mm, E=24.18KJ / cm 2}, {P=28W, f=70KHz, Dm=0.04mm, V=140mm / s, Dy=0.025mm, E=23.08KJ / cm 2}, {P=25W, f=50KHz, Dm=0.05mm, V=150mm / s, Dy=0.028mm, E=17.94KJ / cm 2}, {P=25W, f=100KHz, Dm=0.05mm, V=150mm / s, Dy=0.045mm, E=13.71KJ / cm 2}, {P=24W, f=80KHz, Dm=0.06mm, V=200mm / s, Dy=0.038mm, E=11.34KJ / cm 2}, {P=24W, f=60KHz, Dm=0.05mm, V=240mm / s, Dy=0.0237mm, E=11.1KJ / cm 2}, {P=24W, f=60KHz, Dm=0.05mm, V=240mm / s, Dy=0.025mm, E=10KJ / cm 2}, {P=24W, f=80KHz, Dm=0.05mm, V=300mm / s, Dy=0.025mm, E=8.53KJ / cm 2}, {P=21W, f=70KHz, Dm=0.03mm, V=350mm / s, Dy=0.013mm, E=6.39KJ / cm 2}, {P=18W, f=70KHz, Dm=0.06mm, V=270mm / s, Dy=0.04mm, E=3.88KJ / cm 2}, {P=15W, f=50KHz, Dm=0.05mm, V=350mm / s, Dy=0.05mm, E=0.61KJ / cm 2}.

[0037] Step 3: For any two colors M among the m=14 basic colors Mi, i∈[1,m] obtained in step 2, A and color M B By using the relationship EE1, EE2 and EE3 of the present invention and combining multiple marking methods, it is possible to realize the color M A To color M B This embodiment uses multiple (n=2) marking and coloring methods to achieve the yellow basic color M 13 The color control is switched to the blue basic color M6. A M 13 、M B is M6, and its corresponding laser output energy is E A ∈E 13 and E B ∈E6. In this embodiment, the basic color M A (yellow basic color) to basic color M B The color control of (blue basic color) includes the following operations:

[0038] Operation 1: Select the overlapping state of the laser single pulse light spot during the n=2th marking and coloring. Figure 1 and Figure 2 The laser spots overlap as shown, and the pulse laser scanning interval Dyn≤Dmn at this time.

[0039] Operation 2: According to the relational expression EE1 of the technical solution of the present invention and the multiple marking and coloring (n=2 marking and coloring), the laser energy output is planned to realize the basic color M A (yellow basic color) to basic color M B First, the basic color M is marked by a single (first) laser marking process as described in step 2. A , the output energy value of the pulse laser E A For E A =3.88KJ / cm 2 Then, according to operation 1, the relationship of the present invention is selected

[0040]

[0041] The total output value of pulsed laser energy EE=EE1 of multiple marking and coloring (n=2) of this embodiment is calculated by optimizing the design of the relevant parameters, and it is achieved that the basic color M is obtained by single marking. B The energy requirement range of the laser output, that is, to satisfy the condition EE∈E6, where EE i is the total energy of the laser output for the i-th marking, E A =EE1,i∈[1,n],E B ∈E6, E6∈[12.74KJ / cm 2 , 19KJ / cm 2 ], E6 is the total output energy of the pulsed laser of the basic color M6 of step 2 of the technical solution of the present invention.

[0042] Operation 3: Calculation of laser energy for multiple markings and coloring according to Operation 2 EE∈E6, design the laser parameters and marking parameters for multiple markings (n times), and n=2 in this embodiment. First, according to Calculate the laser output energy of the n=2nd marking: EE2=EE-E A , that is, EE2∈[12.74KJ / cm 2 , 19KJ / cm 2 ]; then according to the relation To optimize the design of the combination of laser parameters and marking parameters for the nth laser marking, for example, setting the laser spot diameter Dmn = 0.05 mm, laser scanning interval Dyn = 0.04 mm, scanning speed V n=150mm / s, pulse laser output frequency f n =100KHz, from which the corresponding change of the nth marking pulse laser output power P can be obtained n ∈[37, 46]W, and finally use it for pulse laser marking and coloring to achieve the basic color M A Towards the basic color M B Color conversion control, such as Figure 6 As shown, the left picture is the basic color M A , the right picture is the basic color M B , the color effect is consistent with the expected one. In addition, the laser output energy E allocated for each marking of multiple markings (n times) can be used, and then the relationship described in step 2 can be used to calculate the value of the laser output energy E allocated for each marking. To optimize the design of the combination of laser parameters and marking parameters for each laser marking, the laser energy outputs for the first and n=2nd markings in this embodiment are E A and EE2, and then use them for marking processing in turn, and you can also get the basic color M A The desired basic color M of the conversion control B , thus achieving the basic color M B Multiple marking preparation, that is, the desired basic color M B It can be achieved by single marking or multiple marking.

[0043] Embodiment 2:

[0044] Step 1: Purchase a Ta1 pure titanium metal plate with a thickness of D=1 mm, namely the titanium metal plate A, from the market, and clean its surface with deionized water to remove dust and other attachments on the surface of the material.

[0045] Step 2: Use a pulsed laser with a central wavelength of 1053nm to perform a single (first) laser marking process by adjusting the laser parameters and marking parameters including output power P, output frequency f, marking speed V, spot diameter Dm, scanning interval Dy, focal length ff of the pulsed laser, etc., and control the total output energy E of the pulsed laser to E s ×M x ×M y On the surface of the titanium plate Ta1, m=14 basic marking colors Mi, i∈[1,m] are obtained, which are black, gray, brown, green, cyan, blue, purple, purple, pink, red, orange, brown, yellow, and silvery white, respectively. The relevant parameters {P, f, Dm, V, Dy, E} used are {P=36W, f=90KHz, Dm=0.01mm, V=20mm / s, Dy=0.04mm, E=50.62KJ / cm 2}, {P=32W, f=80KHz, Dm=0.04mm, V=80mm / s, Dy=0.04mm, E=40KJ / cm 2}, {P=30W, f=60KHz, Dm=0.03mm, V=100mm / s, Dy=0.025mm, E=25.92KJ / cm 2}, {P=30W, f=90KHz, Dm=0.03mm, V=120mm / s, Dy=0.025mm, E=24.18KJ / cm 2}, {P=28W, f=70KHz, Dm=0.04mm, V=140mm / s, Dy=0.025mm, E=23.08KJ / cm 2}, {P=25W, f=50KHz, Dm:=0.05mm, V=150mm / s, Dy=0.028mm, E=17.94KJ / cm2}, {P=25W, f=100KHz, Dm=0.05mm, V=150mm / s, Dy=0.045mm, E=13.71KJ / cm 2}, {P=24W, f=80KHz, Dm=0.06mm, V=200mm / s, Dy=0.038mm, E=11.34KJ / cm 2}, {P=24W, f=60KHz, Dm=0.05mm, V=240mm / s, Dy=0.0237mm, E=11.12KJ / cm 2}, {P=24W, f=60KHz, Dm=0.05mm, V=240mm / s, Dy=0.025mm, E=10KJ / cm 2}, {P=24W, f=80KHz, Dm=0.05mm, V=300mm / s, Dy=0.025mm, E=8.53KJ / cm 2}, {P=21W, f=70KHz, Dm=0.03mm, V=350mm / s.Dy=0.013mm, E=6.39KJ / cm 2}, {P=18W, f=70KHz, Dm=0.06mm, V=270mm / s, Dy=0.04mm, E=3.88KJ / cm 2}, {P=15W, f=50KHz, Dm=0.05mm, V=350mm / s, Dy=0.05mm, E=0.61KJ / cm 2}.

[0046] Step 3: For any two colors M among the m=14 basic colors Mi, i∈[1,m] obtained in step 2,A and color M B By using the relationship EE1, EE2 and EE3 of the present invention and combining multiple marking methods, it is possible to realize the color M A To color M B This embodiment uses multiple (n=2) marking and coloring methods to achieve the color control conversion from the purple basic color M7 to the gray basic color M2. A For M7, M B is M2, and its corresponding laser output energy is E A ∈E7 and E B ∈E2. In this embodiment, the basic color M A Towards the basic color M B The color control includes the following operations:

[0047] Operation 1: Select the overlapping state of the laser single pulse light spot during the n=2th marking and coloring. Figure 3 The laser spots overlap as shown, and the pulse laser scanning interval Dyn≥Dmn at this time.

[0048] Operation 2: According to the relational expression EE2 of the technical solution of the present invention and the multiple marking and coloring (n=2 marking and coloring), the laser energy output is planned to realize the basic color M A Towards the basic color M B First, the basic color M is marked by a single (first) laser marking process as described in step 2. A , the output energy value of the pulse laser E A For E A =13.71KJ / cm 2 Then, according to operation 1, the relationship of the present invention is selected

[0049]

[0050] The total output value of pulsed laser energy EE=EE1 of multiple marking and coloring (n=2) of this embodiment is calculated by optimizing the design of the relevant parameters, and it is achieved that the basic color M is obtained by single marking. B The energy requirement range of the laser output, that is, to satisfy the condition And EE∈E2, where EE i is the total energy of the laser output for the i-th marking, E A =EE1,i∈[1,n],E B ∈E2, E2∈[27.68KJ / cm 2 , 41KJ / cm 2], E2 is the total output energy of the pulsed laser of the basic color M2 described in step 2 of the technical solution of the present invention.

[0051] Operation 3: Calculation of laser energy for multiple markings and coloring according to Operation 2 EE∈E6, design the laser parameters and marking parameters for multiple markings (n times), and n=2 in this embodiment. First, according to Calculate the laser output energy of the n=2nd marking: EE2=EE-E A , that is, EE2∈[13.97KJ / cm 2 , 27.29KJ / cm 2 ]; then according to the relation To optimize the design of the combination of laser parameters and marking parameters for the nth laser marking, for example, setting the laser spot diameter Dmn = 0.05 mm, laser scanning interval Dyn = 0.04 mm, scanning speed V n =120mm / s, pulse laser output frequency f n =90KHz, from which the corresponding change of the nth marking pulse laser output power P can be obtained n ∈[14.5, 28]W, and finally use it for pulse laser marking and coloring to achieve the basic color M A Towards the basic color M B The color conversion control is consistent with the expected color effect. In addition, according to the laser output energy E allocated for each marking of multiple markings (n times), the relationship described in step 2 can be used. To optimize the design of the combination of laser parameters and marking parameters for each laser marking, the laser energy outputs for the first and n=2nd markings in this embodiment are E A and EE2, and then use them for marking processing in turn, and you can also get the basic color M A The desired basic color M of the conversion control B , thus achieving the basic color M B Multiple marking preparation, that is, the desired basic color M B It can be achieved by single marking or multiple marking.

[0052] Embodiment three:

[0053] Step 1: Purchase a Ta1 pure titanium metal plate with a thickness of D=1 mm, namely the titanium metal plate A, from the market, and clean its surface with deionized water to remove dust and other attachments on the surface of the material.

[0054] Step 2: Use a pulsed laser with a central wavelength of 1064nm to perform a single (first) laser marking process by adjusting the laser parameters and marking parameters including output power P, output frequency f, marking speed V, spot diameter Dm, scanning interval Dy, focal length ff of the pulsed laser, etc., and control the total output energy E of the pulsed laser to E s ×M x ×M y On the surface of the titanium plate Ta1, m=14 basic marking colors Mi, i∈[1,m] are obtained, which are black, gray, brown, green, cyan, blue, purple, purple, pink, red, orange, brown, yellow, and silvery white, respectively. The relevant parameters {P, f, Dm, V, Dy, E} used are {P=36W, f=90KHz, Dm=0.01mm, V=20mm / s, Dy=0.04mm, E=50.62KJ / cm 2}, {P=32W, f=80KHz, Dm=0.04mm, V=80mm / s, Dy=0.04mm, E=40KJ / cm 2}, {P=30W, f=60KHz, Dm=0.03mm, V=100mm / s, Dy=0.025mm, E=25.92KJ / cm 2}, {P=30W, f=90KHz, Dm=0.03mm, V=120mm / s, Dy=0.025mm, E=24.18KJ / cm 2}, {P=28W, f=70KHz, Dm=0.04mm, V=140mm / s, Dy=0.025mm, E=23.08KJ / cm 2}, {P=25W, f=50KHz, Dm=0.05mm, V=150mm / s, Dy=0.028mm, E=17.94KJ / cm 2}, {P=25W, f=100KHz, Dm=0.05mm, V=150mm / s, Dy=0.045mm, E=13.71KJ / cm 2}, {P=24W, f=80KHz, Dm=0.06mm, V=200mm / s, Dy=0.038mm, E=11.34KJ / cm 2}, {P=24W, f=60KHz, Dm=0.05mm, V=240mm / s, Dy=0.0237mm, E=11.1KJ / cm 2}, {P=24W, f=60KHz, Dm=0.05mm, V=240mm / s, Dy=0.025mm, E=10KJ / cm 2}, {P=24W, f=80KHz, Dm=0.05mm, V=300mm / s, Dy=0.025mm, E=8.53KJ / cm 2}, {P=21W, f=70KHz, Dm=0.03mm, V=350mm / s, Dy=0.013mm, E=6.39KJ / cm 2}, {P=18W, f=70KHz, Dm=0.06mm, V=270mm / s, Dy=0.04mm, E=3.88KJ / cm 2}, {P=15W, f=50KHz, Dm=0.05mm, V=350mm / s, Dy=0.05mm, E=0.61KJ / cm 2}.

[0055] Step 3: For any two colors M among the m=14 basic colors Mi, i∈[1,m] obtained in step 2, A and color M B By using the relationship EE1, EE2 and EE3 of the present invention and combining multiple marking methods, it is possible to realize the color M A To color M B This embodiment uses multiple (n=2) marking and coloring methods to achieve the color control conversion from the blue basic color M6 to the green basic color M4. A For M6, M B is M4, and its corresponding laser output energy is E A ∈E6 and E B ∈E4. In this embodiment, the basic color M A Towards the basic color M B The color control includes the following operations:

[0056] Operation 1: Select the overlapping state of the laser single pulse light spot during the n=2th marking and coloring. Figure 4 The laser spots overlap as shown, and the pulse laser scanning interval Dyn≥Dmn at this time.

[0057] Operation 2: According to the relational expression EE3 of the technical solution of the present invention and the multiple marking and coloring (n=2 marking and coloring), the laser energy output is planned to realize the basic color M A Towards the basic color M B First, the basic color M is marked by a single (first) laser marking process as described in step 2. A , the output energy value of the pulse laser E A For E A =17.94KJ / cm 2Then, according to operation 1, the relationship of the present invention is selected

[0058]

[0059] The total output value of pulsed laser energy EE=EE1 of multiple marking and coloring (n=2 times) of this embodiment is calculated by optimizing the design of the relevant parameters, and it is achieved that the basic color M is obtained by single marking. B The energy requirement range of the laser output, that is, to satisfy the condition And EE∈E4, where EE i is the total energy of the laser output for the i-th marking, E A =EE1,i∈[1,n],E B ∈E4, E4∈[24KJ / cm 2 , 24.64KJ / cm 2 ], E4 is the total output energy of the pulse laser of the basic color M4 described in step 2 of the technical solution of the present invention.

[0060] Operation 3: Calculation of laser energy for multiple markings and coloring according to Operation 2 EE∈E4, design the laser parameters and marking parameters for multiple markings (n times), and n=2 in this embodiment. First, according to Calculate the laser output energy of the n=2nd marking: EE2=EE-E A , that is, EE2∈[6.06KJ / cm 2 , 6.7KJ / cm 2 ]; then according to the relation To optimize the design of the combination of laser parameters and marking parameters for the nth laser marking, for example, setting the laser spot diameter Dmn = 0.05 mm, laser scanning interval Dyn = 0.04 mm, scanning speed V n =250mm / s, pulse laser output frequency f n =100KHz, from which the corresponding change of the nth marking pulse laser output power P can be obtained n ∈[24.24, 26.8]W, and finally use it for pulse laser marking and coloring to achieve the basic color M A Towards the basic color M B The color conversion control is consistent with the expected color effect. In addition, according to the laser output energy E allocated for each marking of multiple markings (n times), the relationship described in step 2 can be used. To optimize the design of the combination of laser parameters and marking parameters for each laser marking, the laser energy outputs for the first and n=2nd markings in this embodiment are E A and EE2, and then use them for marking processing in turn, and you can also get the basic color M A The desired basic color M of the conversion control B , thus achieving the basic color M B Multiple marking preparation, that is, the desired basic color M B It can be achieved by single marking or multiple marking.

[0061] Embodiment 4:

[0062] Step 1: Purchase a titanium metal plate A with a thickness of D=D0∈[0.5mm, 10cm] from the market, which is a pure titanium metal plate, a titanium alloy plate, etc., including industrial pure titanium Ta1, Ta2, Ta3 and a-type titanium alloys Ta4, Ta5, Ta6, Ta7, Ta8 and α+β-type titanium alloys Tc1, Tc2, Tc3, Tc4, Tc6, Tc7, Tc9, Tc10, etc., and clean its surface with any one of deionized water, alcohol, 1%-3% hydrochloric acid, 1%-3% sodium hydroxide solution, acetone and other cleaning agents to remove dust and other attachments on the surface of the material.

[0063] Step 2: Use a pulsed laser with a central wavelength of any one of 1062nm, 1064nm, 1053nm, 905nm, and 532nm to perform a single (first) laser marking process by adjusting the laser parameters and marking parameters including output power P, output frequency f, marking speed V, spot diameter Dm, scanning interval Dy, and focal length ff of the pulsed laser. By controlling the total output energy E of the pulsed laser to E s ×M x ×M y =E0∈[0.01KJ / cm 2 , 4.1KJ / cm 2 ], m=14 kinds of marking coloring basic colors Mi, i∈[1, m] are obtained on the surface of the titanium metal plate A, and the laser parameters and marking parameters used are P=P0∈[1W, 50W], f=f0∈[5KHz, 200KHz], D m =D∈[10μm, 5cm], V=V0∈[1mm / s, 10000mm / s], D y =D y0∈[0.01mm, 10cm]. The obtained m=14 basic colors are black, gray, brown, green, cyan, blue, purple, purple, pink, red, orange, brown, yellow, and silvery white. The relevant parameters {P, f, Dm, V, Dy, E} used are {P=P1∈[3W, 50W], f=f1∈[10KHz, 200KHz], Dm=D m1 ∈[10μm, 1cm], V=V1∈[1mm / s, 3000mm / s], Dy=D y1 ∈[0.01mm, 1cm], E=E1∈[41KJ / cm 2 , 60KJ / cm 2 ]}, {P=P2∈[3W, 50W], f=f2∈[10KHz, 200KHz], Dm=D m2 ∈[10μm, 1cm], V=V2∈[1mm / s, 3000mm / s], Dy=D y2 ∈[0.01mm, 1cm], E=E2∈[27.68KJ / cm 2 , 41KJ / cm 2 ]}, {P=P3∈[3W, 50W], f=f3∈[10KHz, 200KHz], Dm=D m3 ∈[10μm, 1cm], V=V3∈[1mm / s, 3000mm / s], Dy=D y3 ∈[0.01mm, 1cm], E=E3∈[24.64KJ / cm 2 , 27.68KJ / cm 2 ]}, {P=P4∈[3W, 50W], f=f4∈[10KHz, 200KHz], Dm=D m4 ∈[10μm, 1cm], V=V4∈[1mm / s, 3000mm / s], Dy=D y4 ∈[0.01mm, 1cm], E=E4∈[24KJ / cm 2 , 24.64KJ / cm 2 ]}, {P=P5∈[3W, 50W], f=f5∈[10KHz, 200KHz], Dm=D m5 ∈[10μm, 1cm], V=V5∈[1mm / s, 3000mm / s], Dy=D y5 ∈[0.01mm, 1cm], E=E5∈[22.88KJ / cm 2 , 24KJ / cm 2 ]}, {P=P6∈[3W, 50W], f=f6∈[10KHz, 200KHz], Dm=Dm6 ∈[10μm,1cm],V=V6∈[1mm / s,3000mm / s],Dy=D y6 ∈[0.01mm,1cm],E=E6∈[16.62KJ / cm 2 ,22.88KJ / cm 2 ]}、{P=P7∈[3W,50W],f=f7∈[10KHz,200KHz],Dm=D m7 ∈[10μm,1cm],V=V7∈[1mm / s,3000mm / s],Dy=D y7 ∈[0.01mm,1cm],E=E7∈[11.52KJ / cm 2 ,16.62KJ / cm 2 ]}、{P=P8∈[3W,50W],f=f8∈[10KHz,200KHz],Dm=D m8 ∈[10μm,1cm],V=V8∈[1mm / s,3000mm / s],Dy=D y8 ∈[0.01mm,1cm],E=E8∈[11.2KJ / cm 2 ,11.52KJ / cm 2 ]}、{P=P9∈[3W,50W],f=f9∈[10KHz,200KHz],Dm=D m9 ∈[10μm,1cm],V=V9∈[1mm / s,3000mm / s],Dy=D y9 ∈[0.01mm,1cm],E=E9∈[10.88KJ / cm 2 ,11.2KJ / cm 2 ]}、{P=P 10 ∈[3W,50W],f=f 10 ∈[10KHz,200KHz],Dm=D m10 ∈[10μm,1cm],V=V 10 ∈[1mm / s,3000mm / s],Dy=D y10 ∈[0.01mm,1cm],E=E 10 ∈[9.92KJ / cm 2 ,10.88KJ / cm 2 ]}、{P=P 11 ∈[3W,50W],f=f 11 ∈[10KHz,200KHz],Dm=D m11 ∈[10μm,1cm],V=V 11 ∈[1mm / s,3000mm / s],Dy=Dy11 ∈[0.01mm, 1cm], E=E 11 ∈[7.2KJ / cm 2 , 9.92KJ / cm 2 ]}, {P=P 12 ∈[3W, 50W], f=f 12 ∈[10KHz, 200KHz], Dm=D m12 ∈[10μm, 1cm], V=V 12 ∈[1mm / s, 3000mm / s], Dy=D y12 ∈[0.01mm, 1cm], E=E 12 ∈[5.12KJ / cm 2 , 7.2KJ / cm 2 ]}, {P=P 13 ∈[3W, 50W], f=f 13 ∈[10KHz, 200KHz], Dm=D m13 ∈[10μm, 1cm], V=V 13 ∈[1mm / s, 3000mm / s], Dy=D y13 ∈[0.01mm, 1cm], E=E 13 ∈[1.12KJ / cm 2 , 5.12KJ / cm 2 ]}, {P=P 14 ∈[3W, 50W], f=f 14 ∈[10KHz, 200KHz], Dm=D m14 ∈[10μm, 1cm], V=V 14 ∈[1mm / s, 3000mm / s], Dy=D y14 ∈[0.01mm, 1cm], E=E 14 ∈[0.1KJ / cm 2 , 1.12KJ / cm 2 ]}·

[0064] Step 3: For any two colors M among the m=14 basic colors Mi, i∈[1,m] obtained in step 2, A and color M B By using the relationship EE1, EE2 and EE3 of the present invention and combining multiple marking methods, it is possible to realize the color M A To color M B This embodiment uses multiple (n=n0∈[2,1000]) marking and coloring methods to achieve the color control of the basic color M A Towards the basic color M B Color control conversion, MA ∈Mi,M B ∈Mi and E A <E B , i∈[1,m],E A and E B The corresponding laser output energy. A Towards the basic color M B The color control includes the following operations:

[0065] Operation 1: Select the overlapping state of the laser single pulse light spot during the nth marking and coloring. In this embodiment, select Figure 1-4 Any of the laser spot overlap situations shown.

[0066] Operation 2: According to the relationship EE1, EE2, EE3 and the multiple marking and coloring (n times marking and coloring) of the technical solution of the present invention, the laser energy output is planned to realize the basic color M A Towards the basic color M B First, the basic color M is marked by a single (first) laser marking process as described in step 2. A , the output energy value of the pulse laser E A Then, according to operation 1, the corresponding laser energy calculation formula is selected from the formulas EE1, EE2 and EE3 of the present invention according to the overlap of the selected laser light spots, and the total output value of the pulsed laser energy of the multiple marking and coloring (n times) of this embodiment is calculated by optimizing the relevant parameters therein, EE=EE1 or EE2 or EE3, and it is achieved that the basic color M is obtained by a single marking. B The energy requirement range of the laser output, that is, to satisfy the condition And EEEEE B , among which EE i is the total energy of the laser output for the i-th marking, E EB The basic color E obtained in step 2 of the technical solution of the present invention B The total output energy of the pulsed laser required, E A =EE1,i∈[1,n],E B ∈E EB .

[0067] Operation 3: Calculation of laser energy for multiple markings and coloring according to Operation 2 EE∈EE B , design the laser parameters and marking parameters for the multiple marking (n times) mentioned above. First, according to Allocate the laser output energy for the 1st, 2nd, ..., nth markings, where EE1 = E A, then according to the relationship To optimize the design of the combination of laser parameters and marking parameters for the i-th (i∈[2,n]) laser marking, such as setting the laser spot diameter Dmi, laser scanning interval Dyi, scanning speed V i , pulse laser output frequency f i , from which the corresponding change of the i-th marking pulse laser output power P can be obtained i Finally, it can be used for multiple marking and coloring by pulse laser to achieve the basic color M A Towards the basic color M B The color conversion control is consistent with the expected color effect. In addition, according to the laser output energy E allocated for each marking of multiple markings (n times), the relationship described in step 2 can be used. To optimize the design of the laser parameters and marking parameters for each laser marking, and then use them for marking processing in turn, you can also get the basic color M A The desired basic color M of the conversion control B , thus achieving the basic color M B Multiple marking preparation, that is, the desired basic color M B It can be achieved by single marking or multiple marking.

[0068] The color M of the above embodiment A To M B The precise color control is to first calculate the color M using the relationship EE1, EE2, EE3 B The total output energy EE of the pulsed laser is required, and then the energy EEi is output respectively by the n-time marking method, i∈[1,n], The invention realizes the energy output of the pulse laser for each laser marking by regulating the relevant parameters of each laser marking, wherein the relevant parameters are all the parameters in the relational expressions EE1, EE2 and EE3; the marking parameters of the pulse laser are regulated by reasonable design, and the color change of the surface of the titanium metal plate after multiple laser markings can be estimated by the output energy of the pulse laser for each marking by using the method, so as to realize the precise transformation and regulation of one color to another color on the surface of the titanium metal plate, and solve a series of problems of color coloring and color regulation on the surface of the titanium metal plate; the relational expression E and the relational expressions EE1, EE2 and EE3 of the invention can be used for pulse laser marking of multiple wavelengths, and can color the surface of the titanium metal plate available on the market and precisely regulate the color; the invention realizes the coloring and color regulation of the titanium metal surface by regulating the total output energy of the pulse laser, and effectively solves the problem that the surface temperature of the titanium metal plate is too high when the number of markings is large, causing the metal plate to deform and affecting the color quality, and the obtained color has good quality, bright color and wide application range.

[0069] The above embodiments only express the implementation mode of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are all within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A color control method based on laser marking and coloring of titanium metal surface. It is characterized in that The method described is to control the color by controlling the energy output of the laser, and the method comprises the following steps: Step 1: Prepare a titanium metal plate A with a thickness of D, and clean its surface to remove dust and other attachments on the surface of the material; Step 2: Use a pulsed laser to perform a first laser marking process on the surface of the metal plate A in step 1 by adjusting the output energy of the pulsed laser, thereby obtaining the basic color M that the metal plate A can achieve. i , i∈[1,m], m is an integer; the laser marking process is achieved by controlling the output energy E of the pulsed laser, Among them, E s =P / f is the laser single pulse output energy, M x =D m f / V is the horizontal overlap of the laser single pulse spot area, M y =D m / D y is the spot overlap of the laser single pulse light spot in the vertical direction, D m is the diameter of the laser spot, f is the repetition frequency of the pulsed laser, V is the scanning speed of the pulsed laser, P is the output power of the laser, and D y is the scanning interval of the pulse laser; Step 3: For the basic color Mi described in step 2, any two basic colors within i∈[1,m] are called color M A and color M B The laser output energies are E A and E B And E A ≠E B , and then use the relation Multiple markings can be performed to achieve color M A To M B The color is precisely controlled, EE1, EE2, and EE3 are the total energy of the laser output when multiple markings are performed using a pulsed laser, and n∈[2, 1000] is the number of multiple markings; the multiple markings are n times of energy output to achieve color coloring using the pulsed laser, and each energy output independently completes a color coloring process on the surface of the titanium metal plate and a heat dissipation time T is left for two adjacent markings, T∈[30s, 2min]; the applicable situation of EE1 is D yn ≤D mn , D y(n-1) ≤D m(n-1) and D y(n-1) ≥D m(n-1) , D yn ≤D mn , the applicable situation of EE2 is D y(n-1) ≤D m(n-1) , D yn ≥D mn , the applicable situation of EE3 is D y(n-1) ≥D m(n-1) , D yn ≥D mn ; M xn =D mn f n / V n 、M yn =D mn / D yn are the spot overlap amounts of the laser single pulse light spot in the horizontal and vertical directions during the nth marking, E si =P i / f i is the laser single pulse output energy during the i-th marking, P i and f i are the laser output power and pulse laser repetition frequency during the i-th marking respectively; D mn , D m(n-1) , D mi are the laser spot diameters for the nth, n-1th, and ith markings, respectively, f n 、f n-1 、f i are the laser output frequencies for the nth, n-1th, and ith markings, respectively, V n 、V n-1 、V 1 are the laser scanning speeds for the nth, n-1th, and ith markings, respectively, and D yn , D y(n-1) , D yi are the laser scanning intervals during the nth, n-1th, and ith markings, respectively, and D yc =min(D y(n-1) , D yn ) is the minimum laser scanning interval between two adjacent markings, D yd =max(D y(n-1) , D yn ) The maximum laser scanning interval between two adjacent markings, D yc / D yd It represents the ratio of the overlapping laser spots generated by two adjacent markings to the total number of spots; E1 is the total energy of the overlapping laser spots generated by multiple markings, E 2 M yn Total energy of non-overlapping laser spots generated for multiple markings.

2. A color control method based on laser marking and coloring of titanium metal surface according to claim 1, It is characterized in that The titanium metal plate described in step 1 is a pure titanium metal plate, a titanium alloy plate, etc., including industrial pure titanium Ta1, Ta2, Ta3 and a-type titanium alloys Ta4, Ta5, Ta6, Ta7, Ta8 and α+β-type titanium alloys Tc1, Tc2, Tc3, Tc4, Tc6, Tc7, Tc9, Tc10, etc.; the thickness D of the metal plate A described in step 1 is D∈[0.5mm, 10cm], and preferably D is D∈[1.0mm, 1cm]; the cleaning treatment described in step 1 is achieved by using cleaning agents such as deionized water, alcohol, 1%-3% hydrochloric acid, 1%-3% sodium hydroxide solution, acetone, etc.; the central wavelength of the pulse laser described in step 2 is 1062nm, 1064nm, 1053nm, 905nm, 532nm; the output energy E described in step 2 is E∈[0.01KJ / cm 2 , 4.1KJ / cm 2 ], preferably E is E∈[0.04KJ / cm 2 , 4KJ / cm 2 ]; P, f, D described in step 2 m , V, D y P∈[1W, 50W], f∈[5KHz, 200KHz], D m ∈[10μm, 5cm], V∈[1mm / s, 10000mm / s], D y ∈[0.01mm, 10cm], preferably P∈[9W, 40W], f∈[20KHz, 100KHz], D m ∈[30μm, 100μm], V∈[50mm / s, 3000mm / s], D y ∈[0.03mm, 0.5mm].

3. A color control method based on laser marking and coloring of titanium metal surface according to claim 1 or claim 2, It is characterized in that Step 3 i 、f i , D mi 、V i , D yi , i∈[1,n], is P i ∈[3W, 50W], f i ∈[10KHz, 200KHz], D mi ∈[10μm, 1cm], V i ∈[1mm / s,3000mm / s], D yi ∈[0.01mm, 1cm], preferably P i ∈[9W, 40W], f i ∈[20KHz, 100KHz], D mi ∈[30μm, 100μm], V i ∈[50mm / s, 3000mm / s], D yi ∈[0.03mm, 0.5mm]; the n described in step 3 is preferably n∈[2, 10].

4. A color control method based on laser marking and coloring of titanium metal surface according to claims 1-3, It is characterized in that m=14 in step 2, m basic colors M obtained by outputting the energy of the pulse laser from large to small i , i∈[1,m], are black, gray, brown, green, cyan, blue, purple, purple-red, pink, red, orange, brown, yellow, and silvery white, respectively. The total output energy of the pulsed laser used is E i , i∈[1,m], respectively [41KJ / cm 2 , 60KJ / cm 2 ]、[27.68KJ / cm 2 , 41KJ / cm 2 ]、[24.64KJ / cm 2 , 27.68KJ / cm 2 ]、[24KJ / cm 2 , 24.64KJ / cm 2 ]、[22.88KJ / cm 2 , 24KJ / cm 2 ]、[16.62KJ / cm 2 , 22.88KJ / cm 2 ]、[11.52KJ / cm 2 , 16.62KJ / cm 2 ]、[11.2KJ / cm 2 , 11.52KJ / cm 2 ]、[10.88KJ / cm 2 , 11.2KJ / cm 2 ]、[9.92KJ / cm 2 , 10.88KJ / cm 2 ]、[7.2KJ / cm 2 , 9.92KJ / cm 2 ]、[5.12KJ / cm 2 , 7.2KJ / cm 2 ]、[1.12KJ / cm 2 , 5.12KJ / cm 2 ]、[0.1KJ / cm 2 , 1.12KJ / cm 2 ], preferably [45KJ / cm 2 , 56KJ / cm 2 ]、[29KJ / cm 2 , 38.2KJ / cm 2 ]、[25.2KJ / cm 2 , 26.8KJ / cm 2 ]、[24.23KJ / cm 2 , 24.6KJ / cm 2 ]、[23KJ / cm 2 ,23.88KJ / cm 2 ]、[19.52KJ / cm 2 ,21.88KJ / cm 2 ]、[13.62KJ / cm 2 ,16.62KJ / cm 2 ]、[11.3KJ / cm 2 ,11.48KJ / cm 2 ]、[11KJ / cm 2 ,11.15KJ / cm 2 ]、[9.92KJ / cm 2 ,10.84KJ / cm 2 ]、[7.34KJ / cm 2 ,9.62KJ / cm 2 ]、[5.42KJ / cm 2 ,7.18KJ / cm 2 ]、[1.34KJ / cm 2 ,5KJ / cm 2 ]、[0.62KJ / cm 2 ,1.08KJ / cm 2 ]。 5. A color control method based on laser marking and coloring of titanium metal surface according to claims 1-4, It is characterized in that Step 3 described by color M A To M B The precise color control is to first calculate the color M using the relationship EE1, EE2, EE3 B The total output energy EE of the pulsed laser is required, and then the energy EEi is output respectively by the n-time marking method, i∈[1,n], The color control method is realized by adjusting the relevant parameters of each laser marking to realize the energy output of the pulse laser marking at that time, and the relevant parameters are all the parameters in the relationship EE1, EE2, and EE3; by reasonably designing and adjusting the marking parameters of the pulse laser at each time, the color change of the titanium metal plate surface after multiple laser markings can be estimated by the output energy of each marking of the pulse laser, and the precise transformation control from one color to another color on the titanium metal plate surface can be realized, which solves a series of problems of color coloring and color control on the titanium metal plate surface; the energy E in step 2 and the energy E in step 3 The relationship expressions EE1, EE2, and EE3 can be used for pulsed laser marking of various wavelengths. The given pulsed laser parameters, laser marking parameters, and the energy range of each pulsed laser marking can be used for surface coloring and color control of commercially available titanium plates, thereby achieving precise conversion and control of the colors on the surface of the titanium plates. The color control method achieves coloring and color control of the titanium surface by regulating the total output energy of the pulsed laser, thereby effectively solving the problem of deformation of the metal plate and color quality caused by excessively high surface temperature of the titanium plate when a large number of markings are performed, and the obtained color has good quality, bright colors, and a wide range of applications.

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