Method for carrying out color engraving on metal and laser engraving device

Abstract

The invention provides a method for carrying out color carving on metal, which comprises the following steps: selecting a processing mode, and starting red light carving; laser head focusing is completed, and the positive focus height is fed back; setting an initial height according to the focal height, and sequentially increasing the height of a laser head according to a fixed height difference so as to obtain a plurality of ColorID; selecting a corresponding ColorID of a second test material, and descending or ascending the laser head to a corresponding height; processing and generating a corresponding material test color contrast matrix by setting parameters of the second material test array; setting engraving parameters of the to-be-processed material, and processing the material. When laser heads are offset in focus, different in distance and different in height, generated energy is different, namely different temperatures are generated, different colors are formed after the energy reacts with metal, and then different colors can be carved on the metal. On the basis of offset focus of a laser head, different powers and speeds are set for a processing image, so that colors can be controllably printed on metal.

Description

Technical field

[0001] The invention relates to the technical field of engraving, and in particular to a method for performing color engraving on metal and a laser engraving machine. [Background Technology]

[0002] Traditional methods for applying color to metal surfaces primarily involve ink screen printing and laminating. Because these methods involve plating or coating the metal surface with other materials, durability and color fading are pressing issues. Furthermore, these methods inevitably increase costs and pose environmental risks.

[0003] During the laser engraving process, the graphics are engraved based on the focus, that is, the focus is engraved. In this scenario, the engraving effect on the surface of metals such as stainless steel is a dark black with varying shades. The single color loses the aesthetics and the visual effect is poor.

[0004] When engraving metal surfaces, it's been found that different laser head defocus distances and heights during red light processing can lead to different energies and temperatures. This reacts with the metal to form different colors, resulting in different engraving colors. Color printing utilizes this characteristic. By setting different power and speed settings for the processed image based on the laser head defocus, color printing can be controlled on metal.

[0005] Therefore, exploring how to print different colors on metal surfaces and how to engrave graphics with different colors on metal surfaces is a meaningful technological research and development. [Summary of the invention]

[0006] In view of the above technical problems in the prior art, the present invention provides a method for performing color engraving on metal, which is characterized by comprising:

[0007] Select the processing mode and start red light engraving;

[0008] Complete the laser head focus and feedback the focus height;

[0009] An initial height is set according to the positive focus height, and the laser head height is sequentially increased according to a fixed height difference, thereby obtaining multiple ColorIDs;

[0010] Select the ColorID corresponding to the second test material, lower or raise the laser head to the corresponding height; set the second material test array parameters to generate the corresponding second material test color comparison matrix;

[0011] Set the engraving parameters of the material to be processed and start processing the material.

[0012] The present invention also provides a laser engraving device for performing color engraving on metal, which is characterized by comprising:

[0013] Mode selection module, selects the processing mode and starts red light engraving;

[0014] Focus feedback module, used to complete the focus of the laser head and feedback the focus height;

[0015] A ColorID acquisition module sets an initial height according to the positive focus height and sequentially increases the laser head height according to a fixed height difference to obtain multiple ColorIDs;

[0016] The height adjustment module selects the ColorID corresponding to the second test material and lowers or raises the laser head to the corresponding height;

[0017] a matrix generation module, which generates a corresponding second material test color comparison matrix by setting the second material test array parameters;

[0018] The material processing module sets the engraving parameters of the material to be processed and performs material processing.

[0019] The technical solution implemented in this invention uses red light to engrave metal surfaces. When processing with red light, the laser head is defocused, at different distances, and at different heights. This results in different energies (i.e., temperatures) that react with the metal to form different colors, ultimately creating different engraving colors. By setting different powers and speeds for the processed image based on the laser head's defocus, color printing can be controlled on the metal.

Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0021] Figure 1 It is a schematic flow chart of a method for performing color engraving on metal disclosed by the present invention;

[0022] Figure 2 Yes Figure 1 Schematic diagram of the process of step S3;

[0023] Figure 3 Yes Figure 1 Schematic diagram of the process of step S4;

[0024] Figure 4 Yes Figure 1 Schematic diagram of the process of step S5;

[0025] Figure 5 Yes Figure 1 Schematic diagram of the process of step S6;

[0026] Figure 6 It is a schematic structural diagram of a laser engraving device for performing color engraving on metal disclosed in the present invention;

[0027] Figure 7 Yes Figure 6 The structural diagram of the ColorID acquisition module shown;

[0028] Figure 8 Yes Figure 6 The structural diagram of the height adjustment module shown;

[0029] Figure 9 Yes Figure 6 The structural diagram of the matrix generation module shown;

[0030] Figure 10 Yes Figure 6 The structural diagram of the material processing module shown;

[0031] Figure 11 Yes Figure 1 A schematic flow chart of a method for performing color engraving on metal is shown. [Specific implementation method]

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0035] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] like Figure 1 and Figure 11 As shown, Figure 1 as well as Figure 11 The present invention is a schematic flow chart of a method for performing color engraving on metal, comprising:

[0038] S1. Select the processing mode and start red light engraving;

[0039] S2: Complete the laser head focus and feedback the focus height;

[0040] S3, setting an initial height according to the positive focus height, and sequentially increasing the laser head height according to a fixed height difference, thereby obtaining multiple ColorIDs;

[0041] S4, select the ColorID corresponding to the second test material, and lower or raise the laser head to the corresponding height;

[0042] S5. Generating a corresponding second material test color comparison matrix by setting the second material test array parameters;

[0043] S6. Set the engraving parameters of the material to be processed and perform material processing.

[0044] It should be noted that the focus is automatically or manually adjusted to make the red and blue lights overlap. Secondly, the M27 command is used to query the current laser head focus height startH.

[0045] It should be noted here that the second test material, the first test material, and the material to be processed are all made of the same material and have the same thickness.

[0046] like Figure 2 As shown, Figure 2 Yes Figure 1 The flowchart of step S3 in FIG. 1 includes:

[0047] S31, height setting unit, set the initial height to startH = H0 + 3.5mm, where H0 is the positive focus height, and the Nth ColorID is

[0048] ColorID n =(startH+3.5mm+N*0.2mm)*10;

[0049] On a first test material, color engraving tests of the multiple ColorIDs are performed at multiple laser head heights corresponding to the multiple ColorIDs.

[0050] It should be noted that, based on startH+3.5mm as the starting point, 0.2mm is added to each item in turn according to the number of ColorIDs, and the value*10 is the final ColorID, that is, ColodID=[(startH+3.5+1*0.2)*10,(startH+3.5+2*0.2)*10,(startH+3.5+3*0.2)*10,...].

[0051] It should also be noted that the fixed height difference is 0.2mm. In addition, H0 is the positive focus height, that is, the height of the laser head after focusing is completed; at the same time, the initial height startH is the positive focus height H0 plus 3.5mm.

[0052] like Figure 3 As shown, Figure 3 Yes Figure 1 The flow diagram of step S4 in FIG. 1 includes:

[0053] S41, generating a coordinate G0Z with a height parameter from the heights of the multiple ColorIDs;

[0054] S42, processing the first test material at different heights;

[0055] S43 , judging the processing effect, and selecting the ColorID with the best height as the ColorID corresponding to the second test material.

[0056] like Figure 4 As shown, Figure 4 Yes Figure 1 The flowchart of step S5 in FIG. 1 includes:

[0057] S51, setting the second material test array, including setting the power and speed range;

[0058] S52, generating a material test color comparison matrix on the surface of the second test material according to the power and speed range;

[0059] S53 , testing the color comparison matrix of the second material according to the generated color comparison matrix, thereby obtaining the power and speed coordinates of the corresponding colors.

[0060] It should be noted that after selecting ColorID, set the various parameters on the second material test array page, including setting the power and speed range, and after processing the row and column parameters, generate a power and speed comparison chart.

[0061] See also Figure 5 , Figure 5 Yes Figure 1 The flow diagram of step S6 in FIG. 1 includes:

[0062] S61, adjusting the height of the laser head of the material to be processed to be consistent with the height corresponding to the ColorID of the second material test;

[0063] S61 , setting engraving parameters of the material to be processed according to the power and speed coordinates of the second material test color comparison matrix, and then performing processing.

[0064] Figure 6 The structure diagram of the laser engraving device capable of rotating engraving disclosed in the present invention includes:

[0065] 1. Mode selection module, select the processing mode and start red light engraving;

[0066] 2. Focus feedback module, used to complete the focus of the laser head and feedback the focus height;

[0067] 3. A ColorID acquisition module sets an initial height according to the positive focus height, and sequentially increases the laser head height according to a fixed height difference, thereby obtaining multiple ColorIDs;

[0068] 4. Height adjustment module, select the corresponding ColorID of the second test material and lower or raise the laser head to the corresponding height;

[0069] 5. A matrix generation module, which generates a corresponding second material test color comparison matrix by setting the second material test array parameters;

[0070] 6. Material processing module, which sets the engraving parameters of the material to be processed and performs material processing.

[0071] like Figure 7 As shown, Figure 7 Yes Figure 6 The structural diagram of the ColorID acquisition module shown in FIG. 3 includes:

[0072] 31. Height setting unit, setting the initial height to startH=H0+3.5mm, where H0 is the focus height, and the Nth ColorID is

[0073] ColorID n =(startH+3.5mm+N*0.2mm)*10;

[0074] On a first test material, perform color engraving tests of the multiple ColorIDs at multiple laser head heights corresponding to the multiple ColorIDs;

[0075] like Figure 8 As shown, Figure 8 Yes Figure 6 The height adjustment module 04 includes:

[0076] 41. A coordinate generating unit, configured to generate a coordinate G0Z with a height parameter from the heights of the plurality of ColorIDs;

[0077] 42. A test material processing unit, configured to process the first test material at different heights;

[0078] 43. A judging unit, which judges the processing effect and selects the ColorID with the best height as the ColorID corresponding to the second test material.

[0079] like Figure 9 As shown, Figure 9 Yes Figure 6 The structural diagram of the matrix generation module shown in FIG. 5 ; the matrix generation module 5 includes:

[0080] 51. A test array unit, configured to set the second material test array, including power and speed ranges;

[0081] 52. A matrix comparison unit, configured to generate a material test color comparison matrix on the surface of the second test material according to the power and speed range;

[0082] 53. A coordinate generating unit generates the power and speed coordinates of the corresponding colors according to the generated second material test color comparison matrix.

[0083] See also Figure 10 , Figure 10 Yes Figure 6 The structural diagram of the material processing module is shown. The material processing module 6 includes:

[0084] 61. An adjustment unit, adjusting the laser head height of the material to be processed to be consistent with the height corresponding to the ColorID of the second material test;

[0085] 62. The material processing unit sets the engraving parameters of the material to be processed according to the power and speed coordinates of the second material test color comparison matrix, and then performs processing.

[0086] It should be noted that the order of the steps in the methods of the present invention can be adjusted unless otherwise specified and without affecting the purpose of the invention. For example, the "compression and encoding" process mentioned in the present invention can be performed by encoding first or compression first.

[0087] Compared with the prior art, the present invention provides a method for color engraving on metal, comprising: selecting a processing mode and starting red light engraving; completing the focus of the laser head and feeding back the focus height; setting the initial height according to the focus height, and sequentially increasing the laser head height according to a fixed height difference, thereby obtaining multiple ColorIDs; selecting the corresponding ColorID of the second test material, and lowering or raising the laser head to the corresponding height; processing and generating the corresponding material test color comparison matrix by setting the second material test array parameters; setting the engraving parameters of the material to be processed, and performing material processing. When the laser head is defocused and the distance and height of the laser head are different, the energy generated, i.e., the temperature, are different, and different colors are formed after reacting with the metal, thereby engraving different colors on the metal. Based on the defocus of the laser head, by setting different powers and speeds for the processed image, color printing on the metal can be achieved in a controllable manner.

[0088] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for color engraving on metal, characterized in that: include: Select the processing mode and start red light engraving; Complete the laser head focus and feedback the focus height; Set the initial height according to the positive focus height, and increase the laser head in sequence according to the fixed height difference Height, and then obtain multiple ColorIDs; Select the ColorID corresponding to the second test material and lower or raise the laser head to the corresponding height; By setting the second material test array parameters, a corresponding second material test color comparison matrix is ​​generated; Set the engraving parameters of the material to be processed and start processing the material.

2. The method for color engraving on metal according to claim 1, characterized in that: The step of setting the initial height according to the positive focus height and sequentially increasing the laser head height according to a fixed height difference to obtain multiple ColorIDs includes: Set the initial height to startH=H0+3.5mm, where H0 is the positive focus height, and The Nth ColorID is ColorID n =(startH+3.5mm+N*0.2mm)*10; On a first test material, color engraving tests of the multiple ColorIDs are performed at multiple laser head heights corresponding to the multiple ColorIDs.

3. The method for color engraving on metal according to claim 2, characterized in that: The step of selecting the ColorID corresponding to the second test material and lowering or raising the laser head to the corresponding height includes: Generate the coordinate G0Z with height parameters from the heights of the multiple ColorIDs; by processing the first test material at different heights; The processing effect is judged, and the ColorID with the best height is selected as the corresponding ColorID of the second test material.

4. The method for color engraving on metal according to claim 1, wherein: The step of generating the corresponding second material test color comparison matrix by setting the second material test array parameters includes: Setting the second material test array, including setting a power and speed range; generating a material test color comparison matrix on the surface of the second test material according to the power and speed range; The generated second material test color comparison matrix is ​​used to obtain the power and speed coordinates of the corresponding colors.

5. The method for color engraving on metal according to claim 1, wherein: The steps of setting engraving parameters of the material to be processed and performing material processing include: Adjust the laser head height of the material to be processed to be consistent with the ColorID height of the second material test; According to the second material test color control matrix power and speed coordinates, the engraving parameters of the material to be processed are set, and then processing is performed.

6. A laser engraving device for color engraving on metal, characterized in that: include: Mode selection module, selects the processing mode and starts red light engraving; Focus feedback module, used to complete the focus of the laser head and feedback the focus height; A ColorID acquisition module sets an initial height according to the positive focus height and sequentially increases the laser head height according to a fixed height difference to obtain multiple ColorIDs; The height adjustment module selects the ColorID corresponding to the second test material and lowers or raises the laser head to the corresponding height; a matrix generation module, which generates a corresponding second material test color comparison matrix by setting the second material test array parameters; The material processing module sets the engraving parameters of the material to be processed and performs material processing.

7. The laser engraving device for color engraving on metal according to claim 6, characterized in that: The ColorID acquisition module includes: Height setting unit, sets the initial height to startH=H0+3.5mm, where H0 is the focus height, and the Nth ColorID is ColorID n =(startH+3.5mm+N*0.2mm)*10; On a first test material, color engraving tests of the multiple ColorIDs are performed at multiple laser head heights corresponding to the multiple ColorIDs.

8. The laser engraving device for performing color engraving on metal according to claim 7, wherein: The height adjustment module comprises: A coordinate generating unit, configured to generate a coordinate G0Z with a height parameter from the heights of the plurality of ColorIDs; a test material processing unit for processing the first test material at different heights; The judging unit selects the ColorID with the best height as the ColorID corresponding to the second test material by judging the processing effect.

9. The laser engraving device for color engraving on metal according to claim 6, wherein: The matrix generation module includes: A test array unit, configured to set the second material test array, including setting power and speed ranges; a matrix comparison unit, generating a material test color comparison matrix on the surface of the second test material according to the power and speed range; The coordinate generating unit tests the color comparison matrix of the second material and obtains the power and speed coordinates of the corresponding color.

10. The laser engraving device for color engraving on metal according to claim 6, wherein: The material processing module includes: An adjustment unit adjusts the laser head height of the material to be processed to be consistent with the height corresponding to the ColorID tested by the second material; The material processing unit sets the engraving parameters of the material to be processed according to the power and speed coordinates of the second material test color comparison matrix, and then performs processing.

Images