A method for processing a shell, a shell, and an electronic device

Abstract

The application discloses a shell processing method, a shell and an electronic device. The shell processing method comprises the following steps: performing flattening on a target region of a target surface of a metal base material through laser flat scanning; and respectively processing micro grooves meeting preset conditions in a plurality of blocks in the target region through laser flat scanning. The micro grooves on the plurality of blocks of the metal base material form a stereoscopic pattern with visual effect difference.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, and in particular to a method for processing a housing, a housing, and an electronic device. Background Technology

[0002] To alleviate consumer fatigue with the appearance of electronic devices, manufacturers are increasingly pursuing unique designs on the casings of electronic devices. However, there is currently a lack of technology that can create three-dimensional visual patterns on the casings and is easy to mass-produce. Summary of the Invention

[0003] On the one hand, this application provides the following technical solution:

[0004] A method for processing a housing, comprising:

[0005] The target area on the target surface of the metal substrate is flattened by laser scanning.

[0006] Micro-grooves that meet preset conditions are processed in multiple blocks within the target area by laser scanning. The micro-grooves on the multiple blocks of the metal substrate form a three-dimensional pattern with different visual effects.

[0007] Optionally, in the above processing method, the preset conditions include: the micro-grooves located in the same block are unidirectional micro-texture grooves and are evenly arranged, and the micro-grooves located in adjacent blocks have different directions.

[0008] Optionally, in the above processing method, when the target area is flattened by laser scanning, the laser travels along the surface of the metal substrate in a 90° intersecting grid pattern to process the first texture groove. Among the parameters for processing the first texture groove, the line width and line spacing are the same.

[0009] Optionally, in the above processing method, when multiple blocks within the target area are processed with laser flat scanning to create micro-grooves that meet preset conditions, the laser travels along the surface of the metal substrate in a unidirectional line to process the second textured groove. The parameters for processing the second textured groove need to meet the processing condition that the difference between the line spacing and the line width is not less than 40 μm.

[0010] Optionally, in the above processing method, after all the micro-grooves of multiple blocks within the target area are processed, laser engraving is performed on the first surface of the metal substrate that is opposite to the target surface to remove the warping deformation of the sheet caused by the surface stress of the metal substrate.

[0011] Optionally, in the above processing method, when laser engraving the first surface, the laser travels along the first surface of the metal substrate in a unidirectional line to process the third textured groove, and the line spacing in the parameters for processing the third textured groove is greater than the line spacing in the parameters for processing the second textured groove.

[0012] Optionally, the above processing method includes: before leveling the target area by laser scanning, at least the target area on the target surface is sequentially ground and sandblasted.

[0013] Optionally, in the above processing method, after the grinding and before the sandblasting, the processing method further includes:

[0014] At least the target area on the target surface is shaped and raised by continuous half-cutting to cooperate with the preset pattern on the target surface to form a three-dimensional pattern with different tactile effects.

[0015] On the other hand, this application provides a housing manufactured by the processing method disclosed in any of the above claims, the housing comprising a metal substrate, a target area having a target surface of the metal substrate, the target area having a plurality of blocks, each of the plurality of blocks having microgrooves, the microgrooves on the plurality of blocks of the housing forming a three-dimensional pattern with visually different effects.

[0016] In another aspect, this application provides an electronic device, which includes the aforementioned housing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a flowchart of the shell processing method provided in Embodiment 1 of this application;

[0019] Figure 2 This is a schematic diagram of the housing provided in an embodiment of this application;

[0020] Figure 3 yes Figure 2 A schematic diagram of a portion of the second block 2 under a microscope;

[0021] Figure 4 This is a schematic diagram illustrating the changes on the shell surface during the implementation of the processing method of this application;

[0022] Figure 5 Is with Figure 4 A schematic diagram showing the corresponding changes in the shell cross-section;

[0023] Figure 6 This is a flowchart of the shell processing method provided in Embodiment 2 of this application;

[0024] Figure 7 This is a flowchart of the shell processing method provided in Embodiment 3 of this application.

[0025] The diagram is marked as follows:

[0026] 1. First block; 2. Second block; 3. First texture groove; 4. Second texture groove. Detailed Implementation

[0027] This application provides a method for processing a housing, which can create patterns with three-dimensional visual effects on the housing. Moreover, due to the relatively simple processing method and low cost, it is easy to achieve large-scale mass production applications.

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] See Figures 1-5 This application provides a method for processing a housing, including the following steps:

[0030] Step S1: The target area on the target surface of the metal substrate is flattened by laser scanning.

[0031] The processing method in this application is mainly aimed at metal casings, and the metal substrate can be of various types, such as aluminum or steel. Figure 1 The processing method of this application will be described exemplarily using an aluminum shell as the processing object. The target surface is a component of the outer surface of the shell, such as surface A of a laptop shell, and the target area can be a part or all of the aforementioned target surface. The target area is flattened by laser scanning. Figure 1 The purpose of laser flat scanning ① is to take advantage of the flat scanning of laser to quickly and evenly prepare the surface of the shell, so as to prepare for subsequent processing of micro grooves.

[0032] Step S2: Micro-grooves that meet preset conditions are processed in multiple blocks within the target area by laser scanning. The micro-grooves on the multiple blocks of the metal substrate form a three-dimensional pattern with different visual effects.

[0033] A block is a smaller area divided within the aforementioned target area. The division of blocks can be flexibly set according to the specific pattern designed, such as... Figure 2 As shown, in this embodiment, a leopard pattern is designed on the surface of the shell. The area occupied by the leopard pattern is divided into multiple blocks, including blocks 1 and 2, etc. Micro-grooves are then machined into these blocks using laser scanning. Figure 1 The purpose of laser scanning ② is to make multiple blocks together present a three-dimensional pattern. Its principle is to utilize the microscopic grooves on the blocks to create visual differences, thereby... Figure 2 Taking the first block 1 and the second block 2 as examples, both blocks have micro-grooves processed on them. However, because the micro-grooves on the two blocks reflect light differently, the effect perceived by the human eye is that the first block 1 and the second block 2 have a difference in brightness. Figure 2 Taking the viewing effect shown as an example, the first block 1 is relatively bright, the second block 2 is relatively dark, and so on. Because the area where the pattern is located is divided into multiple blocks, the micro-grooves on these blocks cause different parts of the pattern to present different visual effects. Therefore, multiple blocks together enable the overall pattern to produce a three-dimensional stereoscopic visual effect. It should be noted that the difference in brightness between different blocks varies with the viewing angle of the shell. That is, from other viewing angles, the first block 1 and the second block 2 may appear to be viewed as relatively dark, while the second block 2 is relatively bright.

[0034] To achieve a three-dimensional pattern from multiple blocks, the micro-grooves processed on the blocks must meet certain preset conditions. These preset conditions can be flexibly set according to the parameters involved in the micro-grooves. For example, in this embodiment, the preset conditions include: micro-grooves located in the same block are unidirectional micro-texture grooves and are evenly arranged; micro-grooves in adjacent blocks have different directions. Unidirectional micro-texture grooves mean that the micro-grooves extend in a single direction, and even arrangement means that the micro-grooves are arranged at a fixed interval, that is, the line spacing of the micro-grooves is equal. Figure 3 Showing Figure 2 Taking the micro-grooves on the second block 2 as an example, each micro-groove is along... Figure 3 The micro-grooves extend from the upper left to the lower right, and the micro-grooves follow... Figure 3 The micro-grooves are arranged at equal intervals from the bottom left to the top right. Different directions of micro-grooves in adjacent blocks refer to different directions of extension of the micro-grooves; for example, Figure 2 The first block 1 and the second block 2 are adjacent. Therefore, the micro-grooves on the first block 1 and the micro-grooves on the second block 2 extend in different directions. That is, if... Figure 3 The microscope view is Figure 2 In the first block 1, the micro trench will no longer be Figure 3 The direction of extension shown is not the direction that forms an angle with it, but other directions, such as... Figure 3 The vertical direction, horizontal direction, etc.

[0035] like Figure 1 As shown, in this embodiment, the processing method includes stamping, grinding, and sandblasting before step S1 (i.e., laser scanning ①), and chemical polishing, anodizing, dyeing, and sealing after step S2 (i.e., laser scanning ②). That is, the above steps S1 and S2 can be integrated into traditional surface treatment processes. Stamping is the process of forming the desired shell shape of the metal substrate using a stamping die. In other embodiments, this step can be replaced by machining on a CNC machine tool, or stamping and machining can be combined to obtain the shell shape. Grinding is a pretreatment before sandblasting and can be done using tools such as wire brushes and grinding wheels. The purpose of grinding is to improve the adhesion after sandblasting. Sandblasting uses the impact of a high-speed sand stream to clean and roughen the surface of the metal substrate, which can improve the mechanical properties of the surface, increase the fatigue resistance of the shell, and the micro-roughness formed by sandblasting can increase the adhesion between the metal substrate and the coating, extending the durability of the coating film. The purpose of chemical polishing is to make the edges of the micro-grooves formed by laser scanning ② more rounded, thus improving the grating effect formed by the micro-grooves. Anodizing is the process of electrochemically oxidizing a metal substrate to form an oxide film on its surface. Anodizing not only solves defects in surface hardness and wear resistance but also enhances the aesthetics of the casing. Dyeing involves applying dyes to the surface after anodizing. A variety of dyes are available and can be formulated to meet specific needs. The dye is impregnated or sprayed onto the casing surface, penetrating into the oxide film. Sealing seals the micropores of the oxide film, resulting in a uniform, non-porous surface and a dense oxide film. The dye deposited within the oxide film cannot be wiped off, and the sealed oxide film loses its adsorption properties, preventing contamination or premature corrosion from harmful substances. This improves the anti-fouling and corrosion-resistant properties of the anodized film.

[0036] See Figure 4 and Figure 5 In a preferred embodiment, when the target area is flattened by laser scanning, the laser travels along the surface of the metal substrate in a 90° intersecting grid pattern to process the first textured grooves 3. In the parameters for processing the first textured grooves 3, the line width and line spacing are the same. The first textured grooves 3 intersect to form a grid shape, such as... Figure 4As shown, during the flattening process, the laser can scan horizontally first and then vertically, or vice versa. The line width of the first textured groove 3 is generally set to 60µm to 80µm, and the line spacing is generally set to 60µm to 80µm. The line width and line spacing can be the same or different; for example, both the line width and line spacing of the first textured groove 3 can be set to 70µm. Since the purpose of processing the first textured groove 3 is to flatten it, the depth of processing the first textured groove 3 should not be too large, generally set to 2µm to 3µm. Specifically, a nanosecond infrared laser device can be used to perform laser flattening processing on the target area for the first textured groove 3. The laser power is set to 30W to 40W, the laser frequency is set to 50KHz to 60KHz, and the laser flattening speed is set to 800mm / s to 1200mm / s.

[0037] See Figure 4 and Figure 5 In a preferred embodiment, when multiple blocks within the target area are processed with laser scanning to create micro-grooves that meet preset conditions, the laser travels along the surface of the metal substrate in a unidirectional line to process the second textured groove 4. The parameters for processing the second textured groove 4 must meet the processing condition that the difference between the line spacing and the line width is not less than 40 μm. The second textured groove 4 maintains a unidirectional consistency and is uniformly arrayed, such as... Figure 4 As shown, the linewidth of the second textured groove 4 is generally set to 60µm–80µm, the line spacing is generally set to 100µm–120µm, and the depth is generally set to 8µm–10µm. In the design of the linewidth and line spacing of the second textured groove 4, the line spacing should be greater than the linewidth to prevent line overlap. Therefore, a processing condition can be set where the difference between the line spacing and the linewidth is not less than 40µm, i.e., the difference between the line spacing and the linewidth of the second textured groove 4 is greater than or equal to 40µm. Specifically, a nanosecond infrared laser device can be used to perform laser scanning processing on the block to create the second textured groove 4. The laser power is set to 85W–95W, the laser frequency is set to 50kHz–60kHz, and the laser scanning speed is set to 800mm / s–1200mm / s.

[0038] like Figure 2As shown, after processing the second texture grooves 4 on different blocks of the leopard pattern, they form an array of unidirectional texture grooves, thereby achieving a raster effect. This creates a 3D stereoscopic pattern effect when viewed by the human eye. Besides having different directions, the micro-grooves in adjacent blocks can also have different line widths and / or line spacings. For example, the line width of the second texture groove 4 on the first block 1 can be different from that on the second block 2. The line width, i.e., the groove width, creates a visual difference in light reflection between the first block 1 and the second block 2, thus achieving a 3D stereoscopic pattern effect. Similarly, the line spacing of the second texture grooves 4 on the first block 1 and the second block 2 can also be set differently. The line spacing, i.e., the distance between the grooves, creates a visual difference in light reflection between the first block 1 and the second block 2, thus achieving a 3D stereoscopic pattern effect. It should be understood that, on two adjacent blocks, the direction, line width, and line spacing of the second texture groove 4 can all be set differently, or only one or two of the three parameters can be set differently, as long as the visual effect of light reflection on the two adjacent blocks is different, thereby achieving the 3D stereoscopic pattern effect.

[0039] In a preferred embodiment, the shell processing method further includes: after all the micro-grooves in multiple blocks within the target area are processed, laser engraving is performed on a first surface of the metal substrate that is opposite to the target surface to remove the warping deformation of the sheet metal caused by surface stress. The first surface to be laser engraved is positioned opposite to the target surface where the pattern is located, so as to... Figure 6 Taking the processing method shown as an example, the target surface of the metal substrate is called the front side, and the first surface of the metal substrate is called the back side. Figure 6 The frontal laser ① in the middle Figure 1 Laser planar scanning ① in this context refers to the process of leveling the target area using laser planar scanning. Figure 6 The front laser ② in the middle Figure 1 The laser planar scanning ② in the text refers to the processing of micro-grooves in the block using laser planar scanning. Therefore, for the descriptions of front laser ① and front laser ② above, please refer to the descriptions of laser planar scanning ① and laser planar scanning ② above, and they will not be repeated here.

[0040] Figure 6The reverse laser engraving is used to laser-etch the first surface. During the front laser ① and front laser ② processes, the instantaneous thermal radiation of the laser causes the heat of the casing to concentrate and cannot be released instantly, potentially causing stress and significant warping deformation. In this case, the reverse laser can be used to remove the warping stress deformation. In a preferred embodiment, when laser-etching the first surface, the laser travels along the first surface of the metal substrate in a unidirectional line to process the third textured groove. The line spacing in the parameters for processing the third textured groove is greater than the line spacing in the parameters for processing the second textured groove 4. That is, Figure 6 The line spacing parameters set for the reverse laser are greater than those set for the front laser. Since the third textured groove on the reverse side does not require the same level of refinement as the second textured groove on the front, the processing speed can be appropriately increased to improve processing efficiency when performing the reverse laser. The line width of the third textured groove is generally set to 60–80 μm, the line spacing is generally set to 280–320 μm, and the depth is generally set to 10 μm. Specifically, a nanosecond infrared laser device can be used to laser engrave the third textured groove on the first surface. The laser power is set to 85 W–95 W, the laser frequency is set to 450 kHz–550 kHz, and the laser's movement speed along the first surface is set to 2800 mm / s–3200 mm / s.

[0041] See Figure 1 and Figure 6 When grinding and sandblasting steps are included before laser flattening of the target area, the target area should be ground and sandblasted sequentially at least once, meaning the ground and sandblasted area should cover the entire target area. The target area is the region on the target surface where the designed pattern is located. To achieve a more realistic and three-dimensional 3D effect, the shell can be embossed. For example... Figure 7 As shown, in a preferred embodiment, after grinding and before sandblasting, the processing method further includes: at least shaping and embossing the target area of ​​the target surface using continuous half-cutting, to match a preset pattern on the target surface and form a three-dimensional pattern with different tactile effects. The continuous half-cutting technique creates continuous undulating protrusions on the shell through half-cutting, reducing the presence of step-like protrusions on the surface. Figure 7 The embossing of shapes in the design should be appropriately set according to the content that the design is meant to convey. For example, Figure 2 The leopard's eyes should be recessed relative to its nose, making the nose more prominent than the eyes. The embossing process can be done in multiple passes, with each pass building upon the previous one. This embossing technique creates realistic undulations on the shell, which, combined with subsequent laser-processed microgrooves, achieves a more lifelike 3D pattern effect.

[0042] This application also provides a housing manufactured by any of the above processing methods, the housing comprising a metal substrate, a target area having a target surface on the metal substrate, the target area having multiple blocks, each of the multiple blocks having microgrooves, the microgrooves on the multiple blocks of the housing forming a three-dimensional pattern with visually different effects.

[0043] This application also provides an electronic device including the aforementioned housing, specifically, the electronic device may be a laptop computer, tablet computer, mobile phone or monitor.

[0044] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for processing a housing, comprising: The target area on the target surface of the metal substrate is flattened by laser scanning. During flattening, the laser moves along the surface of the metal substrate in a 90° intersecting grid pattern to process the first texture groove. Multiple blocks within the target area are processed by laser scanning to create micro-grooves that meet preset conditions. The micro-grooves on the multiple blocks of the metal substrate form a three-dimensional pattern with different visual effects. The preset conditions include: the micro-grooves in the same block are unidirectional micro-texture grooves and are evenly arranged; the micro-grooves in adjacent blocks have different directions.

2. In the shell processing method according to claim 1, the line width and line spacing are the same in the parameters for processing the first textured groove.

3. In the shell processing method according to claim 1, when multiple blocks within the target area are processed with laser flat scanning to create micro-grooves that meet preset conditions, the laser travels along the surface of the metal substrate in a unidirectional line to process the second textured groove, and the parameters for processing the second textured groove need to meet the processing condition that the difference between the line spacing and the line width is not less than 40 μm.

4. According to the shell processing method of claim 3, after all the micro-grooves of multiple blocks within the target area are processed, laser engraving is performed on the first surface of the metal substrate that is opposite to the target surface to remove the warping deformation of the sheet metal caused by the surface stress of the metal substrate.

5. In the shell processing method according to claim 4, when laser engraving the first surface, the laser travels along the first surface of the metal substrate in a unidirectional line to process the third texture groove, and the line spacing in the parameters for processing the third texture groove is greater than the line spacing in the parameters for processing the second texture groove.

6. The method of processing a case of any of claims 1-5, comprising: Before the target area is leveled by laser scanning, the target area on the target surface is at least sequentially polished and sandblasted.

7. The shell processing method according to claim 6, wherein after the grinding and before the sandblasting, the processing method further comprises: At least the target area on the target surface is shaped and raised by continuous half-cutting to cooperate with the preset pattern on the target surface to form a three-dimensional pattern with different tactile effects.

8. A housing manufactured by the processing method according to any one of claims 1 to 7, the housing comprising a metal substrate, a target area having a target surface of the metal substrate, the target area having a plurality of blocks, each of the plurality of blocks having microgrooves, the microgrooves on the plurality of blocks of the housing forming a three-dimensional pattern with visually different effects.

9. An electronic device comprising the housing as claimed in claim 8.

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