Staggered additive manufacturing method, device, equipment and medium
By adopting the interlaced additive manufacturing method in the laser selection melt forming technology, the filling method of laser vector interlaced distribution is used to solve the problem of non-welding defects caused by the traditional filling method, and more efficient parts printing quality and density are achieved.
Patent Information
- Application Number
- CN202311815694.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2025-06-27
AI Technical Summary
During the melting and forming process of laser selection areas, traditional strip and checkerboard filling methods can easily lead to the concentration of no welding defects during the printing process of parts, especially when the printing layer thickness increases or the forming laser speed is large, the defects are more obvious.
By using the interlaced additive manufacturing method, by obtaining the three-dimensional model of the part to be printed and performing slice processing, the edge area and the middle area are filled with laser vector interleaving distribution, so that the laser vectors of adjacent scanning lines are separated from one end of the edge or the starting position are staggered, forming multiple strip-shaped toothed areas. Each row of scanning lines in each area contains a laser vector, and the printing of the parts is scanned in turn.
It effectively avoids the concentration of unwelded defects during part printing, reduces the chance of internal defects in the part, and is especially suitable for improving the quality and density of the part when the printing layer is thick or the forming laser speed is large.
Smart Images
Figure CN120205834A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of additive manufacturing, and particularly to an interleaved additive manufacturing method, device, equipment and medium. Background Art
[0002] Selective laser melting (SLM for short) is a widely used and highly mature process method. During the SLM forming process, the metal powder is completely melted to produce metallurgical bonding. The formed parts have good density, high tissue performance, etc., and can form high-precision complex-shaped metal parts. The SLM technology slices the part model to be printed by a slicing software at a certain thickness. Then, a scanning path is filled in a certain way in each two-dimensional layer. During the forming process, first, a layer of metal powder is laid on the substrate according to the set layer thickness, and then the laser melts the metal powder according to the set two-dimensional scanning path to form the shape of the current layer of the part. Then, a scraper lays another layer of metal powder on the processed layer. This process is repeated until the part is finally formed.
[0003] The currently commonly used filling pattern types mainly include three types: no pattern, strip type and checkerboard type. The filling method without a pattern is rarely applied to the production of actual parts due to the large accumulated stress. The strip type and checkerboard type filling methods are more commonly used. Above the substrate, since the force of solid powder particles on liquid particles is less than the force between liquid particles, the wetting angle tends to be an obtuse angle, and the shape of the molten pool tends to be circular. At the end points of the molten pool, the shape of the molten pool also tends to be circular, resulting in unfused defects likely to occur at the lap joint where two molten pools of the part are connected. As the printed layer thickness increases, the required laser power increases, making these defects more obvious.
[0004] Therefore, there is an urgent need for an interleaved additive manufacturing method, device, equipment and medium. Summary of the Invention
[0005] The purpose of the present invention is to provide an interleaved additive manufacturing method, device, equipment and medium, which is used to avoid the area where unfused defects are concentrated during the part printing process and reduce the probability of internal defects in the part.
[0006] To achieve the above purpose, the present invention provides the following technical solutions:
[0007] In the first aspect, the present invention provides an interleaved additive manufacturing method, including:
[0008] Obtain a three-dimensional model of the part to be printed, and perform slicing processing on the three-dimensional model to obtain a plurality of sliced layers; the sliced layer includes an edge area and a middle area;
[0009] The edge region and the middle region are filled respectively in a staggered distribution manner of laser vectors, so that the positions of the laser vectors of adjacent scanning lines in the edge region away from the edge are staggered, and the starting positions of the laser vectors of adjacent scanning lines in the middle region are staggered, and the filled slice layer is obtained by dividing the filled slice layer into regions according to the filled laser vectors to obtain a plurality of strip-shaped toothed regions; each of the strip-shaped toothed regions contains one laser vector per scanning line;
[0010] The strip-shaped toothed areas are scanned sequentially to complete the printing of the part to be printed.
[0011] Compared with the prior art, the staggered additive manufacturing method provided by the present invention includes: obtaining a three-dimensional model of a part to be printed, and slicing the three-dimensional model to obtain multiple slice layers; the slice layer includes an edge area and a middle area; the edge area and the middle area are filled respectively in a staggered distribution manner of laser vectors, so that the positions of the laser vectors of adjacent scanning lines in the edge area away from one end of the edge are staggered, and the starting positions of the laser vectors of adjacent scanning lines in the middle area are staggered to obtain the filled slice layer; the filled slice layer is divided into regions according to the filled laser vectors to obtain multiple strip-shaped toothed regions; each strip-shaped toothed region contains a laser vector per scanning line; the strip-shaped toothed regions are scanned in turn to complete the printing of the part to be printed. This scheme designs a new staggered laser path planning method, staggering the endpoints of the laser vector of each scanning line so that the starting point or end point of the molten pool is staggered, avoiding the concentration of unfused defects caused by the concentration of the starting point of the molten pool in the traditional filling method, reducing the probability of defects inside the part, and is especially suitable for applications where the printing layer is thick or the forming laser speed is high. In these cases, the existing scanning method is prone to large unfused defects at the end point of the laser path. In addition, the slice layer after filling is divided into regions, and after printing a strip-shaped toothed area, the next strip-shaped toothed area is printed in sequence. Each strip-shaped toothed area contains only one laser vector per scanning line, avoiding high stress during the part printing process.
[0012] In a second aspect, the present invention provides a staggered additive manufacturing device, comprising:
[0013] A three-dimensional model acquisition module is used to acquire a three-dimensional model of a part to be printed, and slice the three-dimensional model to obtain a plurality of slice layers; the slice layers include an edge area and a middle area;
[0014] A path filling module, which is used to fill the edge area and the middle area respectively in a way that laser vectors are distributed in an interleaved manner, so that the positions of the ends of the laser vectors of adjacent scan lines in the edge area that are far from the edge are distributed in an interleaved manner, and the starting positions of the laser vectors of adjacent scan lines in the middle area are distributed in an interleaved manner, to obtain a filled slice layer. A region division module is used to divide the filled slice layer into multiple strip-shaped tooth-like regions according to the filled laser vectors; each strip-shaped tooth-like region contains one laser vector per row of scan lines;
[0015] A printing module, which is used to scan the strip-shaped tooth-like regions in sequence to complete the printing of the part to be printed.
[0016] In a third aspect, the present invention provides an interleaved additive manufacturing device, including:
[0017] A communication unit / communication interface, which is used to obtain a three-dimensional model of a part to be printed and perform slicing processing on the three-dimensional model to obtain multiple slice layers; the slice layer includes an edge area and a middle area;
[0018] A processing unit / processor, which is used to fill the edge area and the middle area respectively in a way that laser vectors are distributed in an interleaved manner, so that the positions of the ends of the laser vectors of adjacent scan lines in the edge area that are far from the edge are distributed in an interleaved manner, and the starting positions of the laser vectors of adjacent scan lines in the middle area are distributed in an interleaved manner, to obtain a filled slice layer. Divide the filled slice layer into multiple strip-shaped tooth-like regions according to the filled laser vectors; each strip-shaped tooth-like region contains one laser vector per row of scan lines;
[0019] Scan the strip-shaped tooth-like regions in sequence to complete the printing of the part to be printed.
[0020] In a fourth aspect, the present invention provides a computer-readable storage medium, in which instructions are stored, and when the instructions are run, the above-mentioned interleaved additive manufacturing method is implemented.
[0021] The technical effects achieved by the device-related solution provided in the second aspect, the equipment-related solution provided in the third aspect, and the computer-readable storage medium-related solution provided in the fourth aspect are the same as those of the method-related solution provided in the first aspect, and will not be elaborated here. Description of the Drawings
[0022] The drawings described here are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:
[0023] Figure 1Schematic diagram of the strip scanning method in the prior art;
[0024] Figure 2 Schematic diagram of the defect at the strip lap joint in the prior art;
[0025] Figure 3 Flowchart of an interleaved additive manufacturing method provided by the present invention;
[0026] Figure 4 Schematic diagram of the interleaved scanning method provided by the present invention;
[0027] Figure 5 Schematic diagram of the interleaved area division provided by the present invention;
[0028] Figure 6 Schematic diagram of the digital model of the part to be printed provided by the present invention;
[0029] Figure 7 Schematic diagram of the slice of the interleaved scanning method provided by the present invention;
[0030] Figure 8 Schematic diagram of the structure of an interleaved additive manufacturing device provided by the present invention;
[0031] Figure 9 Schematic diagram of the structure of an interleaved additive manufacturing equipment provided by the present invention.
[0032] Reference numerals:
[0033] 1 - Edge area, 2 - Intermediate area, 3 - Laser vector. Detailed implementation manners
[0034] For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and roles. For example, the first threshold and the second threshold are only used to distinguish different thresholds, and do not limit their sequence. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and terms such as "first" and "second" do not necessarily limit being different.
[0035] It should be noted that in the present invention, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present invention should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific manner.
[0036] In the present invention, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, or B exists alone, where A and B may be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item(s) or plural item(s). For example, at least one (item) of a, b, or c may represent: a, b, c, the combination of a and b, the combination of a and c, the combination of b and c, or the combination of a, b, and c, where a, b, and c may be single or multiple.
[0037] The traditional scanning filling method is usually strip-shaped. As Figure 1 shown, in the strip-shaped filling method, the endpoints of the laser vectors in each scan line are on the same vertical line. During the scanning process, after each laser vector is scanned, the molten pool at the end tends to be circular. When the next laser vector is scanned, the molten pools where the two laser vectors contact are prone to generate unfused defects. And since the endpoints of the laser vectors after strip-shaped filling are on the same vertical line, the concentrated area at the top of the molten pool is too large, and the unfused area is concentrated. The part will have unfused defects such as Figure 2 shown, collapse or visible gaps to the naked eye, resulting in poor part quality.
[0038] To solve the above problems, the present invention provides a staggered additive manufacturing method, device, equipment, and medium, which makes the starting points of the molten pools arranged staggeredly, avoiding the areas prone to generating defects. Especially in the case of a large layer thickness and a large laser power, the defects inside the part entity are reduced. The following is a detailed description.
[0039] Figure 3 The following is a flowchart of a staggered additive manufacturing method provided by the present invention. As Figure 3 shown, the method includes the following steps:
[0040] Step 301: Obtain a three-dimensional model of the part to be printed, and perform slicing processing on the three-dimensional model to obtain a plurality of sliced layers;
[0041] Specifically, use the repair guiding function to repair the three-dimensional model to obtain a repaired three-dimensional model;
[0042] Add a support structure to the repaired three-dimensional model according to the part structure in the repaired three-dimensional model to obtain a target three-dimensional model;
[0043] Perform slicing processing on the target three-dimensional model according to a preset thickness to obtain a plurality of sliced layers.
[0044] As shown Figure 4 in the figure, each slice layer includes an edge area 1 and a middle area 2; the edge area 1 is the area of the part edge contour, that is, the area where printing starts or ends. The middle area 2 is the area located between the starting edge area and the ending edge area, and the scanning filling needs to fill the edge area and the middle area together.
[0045] Step 302: Fill the edge area and the middle area respectively in a way that the laser vectors are distributed in an interleaved manner. Make the positions of the ends of the laser vectors of adjacent scan lines in the edge area away from the edge be distributed in an interleaved manner, and the starting positions of the laser vectors of adjacent scan lines in the middle area be distributed in an interleaved manner, to obtain the filled slice layer as shown Figure 4 in the figure. The first end of the first laser vector and the first end of the second laser vector in the edge area 1 are both on the contour line, and the second end of the first laser vector and the center of the second laser vector are on the same vertical line; the first laser vector and the second laser vector are laser vectors adjacent in the vertical direction; for example, at the printing start position, the starting points of the laser vectors in the edge area are on the contour line, and the ending points of the laser vectors are distributed in an interleaved manner; at the printing end position, the ending points of the laser vectors in the edge area are on the contour line, and the starting points of the laser vectors are distributed in an interleaved manner; the center position of any laser vector 3 in the middle area 2 and the starting position of the laser vector 3 in the adjacent scan line are on the same vertical line, the laser vectors 3 in the middle area 2 have the same length, the distance between adjacent two laser vectors 3 is the same, the distance between adjacent scan lines is the same, and each scan line includes multiple laser vectors.
[0046] Step 303: Divide the filled slice layer according to the filled laser vectors to obtain a plurality of bar-shaped tooth-like areas;
[0047] As shown Figure 5 in the figure, the bar-shaped tooth-like area includes area 1, area 2, and area 3, and each scan line of each bar-shaped tooth-like area contains one laser vector; the scanning directions of adjacent scan lines in each bar-shaped tooth-like area can be the same or opposite.
[0048] Step 304: Scan the bar-shaped tooth-like areas in sequence to complete the printing of the part to be printed.
[0049] Refer to Figure 5 , form area 1, area 2, and area 3 in sequence. Within each area, the laser scans the laser vectors in sequence from left to right.
[0050] Specifically, for the scanning of any slice layer, scan the bar-shaped tooth-like area at the starting position, and then scan the next bar-shaped tooth-like area until all bar-shaped tooth-like areas are scanned;
[0051] Rotate the laser device by a preset angle to scan the next slice layer;
[0052] Complete the scanning of all slice layers to obtain the part to be printed;
[0053] Use wire cutting to separate the printed part and the substrate to obtain the separated part;
[0054] Polish the separated part to obtain the target part.
[0055] This staggered additive manufacturing method designs a new type of staggered laser path planning method, which staggers the endpoints of the laser vectors of each scan line, so that the starting or ending points of the molten pools are staggered, avoiding the concentration of unfused defects caused by the concentration of the starting points of the molten pools in the traditional filling method, reducing the probability of internal defects in the part, and is especially suitable for applications where the printing layer is thick or the forming laser speed is high. In these cases, large unfused defects are likely to appear at the endpoints of the laser path in the existing scanning methods. In addition, the filled slice layer is divided into regions, and after printing a bar-shaped tooth-like region, the next bar-shaped tooth-like region is printed in sequence. Each scan line of each bar-shaped tooth-like region only contains one laser vector, avoiding the situation of high stress during part printing.
[0056] As an optional method, before obtaining the filled slice layer by using the method of staggered distribution of laser vectors to fill the edge region and the middle region respectively, so that the positions of the ends of the laser vectors of adjacent scan lines in the edge region are staggered away from the edge, and the starting positions of the laser vectors of adjacent scan lines in the middle region are staggered, it further includes:
[0057] Obtain filling parameters, where the filling parameters include laser vector length, laser vector spacing, scan line spacing, and laser scanning direction; the laser vector length, laser scanning direction, scan line spacing, and laser vector spacing can be adjusted according to different materials and forming scenarios.
[0058] According to the filling parameters, use the method of staggered distribution of laser vectors to fill the path of each slice layer.
[0059] Taking the part shown in Figure 6 as an example, first use software to open the three-dimensional model of the part to be formed, and use the repair guiding function to repair the three-dimensional model of the part, as shown in Figure 6As shown, the part has a conical structure. It should be noted that the 3D model is not limited to a simple conical structure, and parts of various shapes and sizes can use this scanning method. Determine a suitable printing direction for the part and add appropriate supports. According to the material and structural characteristics of the part, set appropriate printing parameters. Set the laser path, that is, the laser vector, in a form where the starting points are staggered, and set parameters such as the length of the laser vector, the spacing between laser vectors, the spacing between scan lines, and the laser scanning direction. The filled laser path is as shown in Figure 7 As shown. Slice according to the set scanning filling method and the set parameters, import it into the laser additive manufacturing equipment for printing, and then use wire cutting to separate the part and the substrate to obtain the required part.
[0060] The embodiments of the present invention can divide functional modules according to the above method examples. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present invention is illustrative, only a logical function division, and there may be other division methods in actual implementation.
[0061] In the case of dividing each functional module corresponding to each function, Figure 8 shows a schematic structural diagram of an interleaved additive manufacturing device provided by the present invention. As shown in Figure 8 As shown, the device includes:
[0062] A 3D model acquisition module 801, configured to acquire a 3D model of a part to be printed and perform slicing processing on the 3D model to obtain a plurality of slice layers; the slice layer includes an edge region and a middle region;
[0063] A path filling module 802, configured to fill the edge region and the middle region respectively in a manner where laser vectors are interleaved, so that the positions of the ends of the laser vectors of adjacent scan lines in the edge region that are far from the edge are staggered, and the starting positions of the laser vectors of adjacent scan lines in the middle region are staggered, to obtain a filled slice layer. A region division module 803, configured to perform region division on the filled slice layer according to the filled laser vectors to obtain a plurality of bar-shaped tooth-like regions; each row of scan lines in each bar-shaped tooth-like region includes one laser vector;
[0064] A printing module 804, configured to sequentially scan the bar-shaped tooth-like regions to complete the printing of the part to be printed.
[0065] Optionally, the first ends of the first laser vector and the second laser vector in the edge area are both on the contour line, and the second end of the first laser vector and the center of the second laser vector are on the same vertical line; the first laser vector and the second laser vector are laser vectors adjacent in the perpendicular direction; for any laser vector in the middle area, the center position thereof and the starting position of the laser vector in the adjacent scan line are on the same vertical line, the lengths of the laser vectors in the middle area are the same, the distances between adjacent two laser vectors are the same, the distances between adjacent scan lines are the same, and each scan line includes multiple laser vectors.
[0066] Optionally, the 3D model acquisition module 801 specifically includes:
[0067] A repair unit, configured to repair the 3D model by using a repair guiding function to obtain a repaired 3D model;
[0068] A support adding unit, configured to add a support structure to the repaired 3D model according to the part structure in the repaired 3D model to obtain a target 3D model;
[0069] A slicing unit, configured to slice the target 3D model according to a preset thickness to obtain a plurality of slice layers.
[0070] Optionally, the device further includes a setting module, and the setting module can specifically be used for:
[0071] Obtaining filling parameters, where the filling parameters include laser vector length, laser vector spacing, scan line spacing, and laser scanning direction; and performing path filling on each slice layer in a manner of staggered distribution of laser vectors according to the filling parameters.
[0072] Optionally, the printing module 804 may include:
[0073] A scanning unit for each slice layer, configured to scan the bar-shaped tooth area at the starting position for any slice layer, and then scan the next bar-shaped tooth area until all bar-shaped tooth areas are scanned;
[0074] A laser angle rotation unit, configured to rotate the laser device by a preset angle for scanning the next slice layer;
[0075] A continuous printing unit, configured to complete the scanning of all slice layers to obtain a part to be printed.
[0076] Optionally, the device further includes a processing module, and the processing module may include:
[0077] A wire cutting unit, configured to separate the printed part and the substrate by wire cutting to obtain a separated part;
[0078] A polishing unit for polishing the separated parts to obtain the target parts.
[0079] Optionally, the scanning directions of adjacent scanning lines in each of the strip-shaped tooth-like regions are opposite.
[0080] The above-mentioned staggered additive manufacturing device is a virtual device, including virtual units and virtual function modules. This device is built on a laser additive manufacturing equipment and used. At the same time, a staggered additive manufacturing device provided by the present invention corresponds to a staggered additive manufacturing method and acts on the laser additive manufacturing equipment.
[0081] The above mainly introduces the solution provided by the embodiments of the present invention from the perspective of the interaction between various modules. It can be understood that, in order to implement the above functions, it includes the corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed in this article, the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.
[0082] In the case of adopting a corresponding integrated unit, Figure 9 The structural schematic diagram of a staggered additive manufacturing equipment provided by the present invention is shown. As Figure 9 shown, the staggered additive manufacturing equipment includes:
[0083] A communication unit / communication interface for obtaining the three-dimensional model of the part to be printed and performing slicing processing on the three-dimensional model to obtain a plurality of sliced layers; the sliced layers include an edge region and a middle region;
[0084] A processing unit / processor for respectively filling the edge region and the middle region in a manner of staggered distribution of laser vectors, so that the positions of the ends of the laser vectors of adjacent scanning lines in the edge region away from the edge are staggered, and the starting positions of the laser vectors of adjacent scanning lines in the middle region are staggered, obtaining the filled sliced layer, dividing the filled sliced layer according to the filled laser vectors to obtain a plurality of strip-shaped tooth-like regions; each row of scanning lines in each of the strip-shaped tooth-like regions includes one laser vector;
[0085] Scanning the strip-shaped tooth-like regions in sequence to complete the printing of the part to be printed.
[0086] The above-mentioned staggered additive manufacturing equipment is used on a laser additive manufacturing equipment. At the same time, a staggered additive manufacturing equipment provided by the present invention corresponds to a staggered additive manufacturing method and acts on the laser additive manufacturing equipment.
[0087] In some possible implementation manners, the above-mentioned staggered additive manufacturing equipment may further include a storage module for storing program codes and data of the base station.
[0088] Among them, the processing unit may be a processor or a controller. For example, it may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logic blocks, modules and circuits described in connection with the disclosure of the present invention. The processor may also be a combination that realizes computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication module may be a transceiver, a transceiver circuit or a communication interface, etc. The storage module may be a memory.
[0089] As Figure 9 shown, the above-mentioned processor may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present invention. The above-mentioned communication interface may be one or more. The communication interface may use any device such as a transceiver for communicating with other devices or communication networks.
[0090] As Figure 9 shown, the above-mentioned terminal device may further include a communication line. The communication line may include a path for transmitting information between the above-mentioned components.
[0091] Optionally, as Figure 9 shown, the terminal device may further include a memory. The memory is used for storing computer execution instructions for executing the solution of the present invention and is controlled by the processor for execution. The processor is used for executing the computer execution instructions stored in the memory, thereby implementing the method provided by the embodiments of the present invention.
[0092] As Figure 9As shown in the figure, the memory can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory can exist independently and be connected to the processor through a communication line. The memory can also be integrated with the processor.
[0093] Optionally, the computer-executable instructions in the embodiments of the present invention can also be referred to as application program code, and the embodiments of the present invention do not make specific limitations thereto.
[0094] In a specific implementation, as an embodiment, as Figure 9 shown in the figure, the processor can include one or more CPUs, such as Figure 9 CPU0 and CPU1 in the figure.
[0095] In a specific implementation, as an embodiment, as Figure 9 shown in the figure, the terminal device can include multiple processors, such as Figure 9 the processors in the figure. Each of these processors can be a single-core processor or a multi-core processor.
[0096] On the one hand, a computer-readable storage medium is provided. Instructions are stored in the computer-readable storage medium, and when the instructions are run, the above-mentioned staggered additive manufacturing method is implemented.
[0097] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present invention are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a terminal, a user device, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc (DVD); or it can be a semiconductor medium, such as a solid state drive (SSD).
[0098] Although the present invention has been described in connection with various embodiments, however, in the process of implementing the claimed invention, those skilled in the art can understand and achieve other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit can implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.
[0099] Although the present invention has been described in connection with specific features and their embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present invention. Accordingly, the present specification and the drawings are merely exemplary descriptions of the present invention defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.
Claims
1. An interleaved additive manufacturing method, characterized in that, Including: Obtain a three-dimensional model of the part to be printed, and perform slicing processing on the three-dimensional model to obtain a plurality of slice layers; the slice layers include an edge region and a middle region; Fill the edge region and the middle region respectively in a manner of staggered distribution of laser vectors, so that the positions of the ends of the laser vectors of adjacent scan lines in the edge region away from the edge are staggered, and the starting positions of the laser vectors of adjacent scan lines in the middle region are staggered, to obtain a filled slice layer; Divide the filled slice layer into a plurality of strip-shaped tooth-like regions according to the filled laser vectors; each row of scan lines in each strip-shaped tooth-like region includes one laser vector; Scan the strip-shaped tooth-like regions in sequence to complete the printing of the part to be printed.
2. The staggered additive manufacturing method according to claim 1, wherein The first end of the first laser vector and the first end of the second laser vector in the edge region are both on the contour line, and the second end of the first laser vector and the center of the second laser vector are on the same vertical line; the first laser vector and the second laser vector are laser vectors adjacent in the vertical direction; the center position of any laser vector in the middle region and the starting position of the laser vector in the adjacent scan line are on the same vertical line, the lengths of the laser vectors in the middle region are the same, the distances between adjacent two laser vectors are the same, the distances between adjacent scan lines are the same, and each scan line includes a plurality of laser vectors.
3. The interleaved additive manufacturing method according to claim 1, wherein The obtaining of the three-dimensional model of the part to be printed and performing slicing processing on the three-dimensional model to obtain a plurality of slice layers includes: Use the repair guiding function to repair the three-dimensional model to obtain a repaired three-dimensional model; Add a support structure to the repaired three-dimensional model according to the part structure in the repaired three-dimensional model to obtain a target three-dimensional model; Perform slicing processing on the target three-dimensional model according to a preset thickness to obtain a plurality of slice layers.
4. The staggered additive manufacturing method according to claim 1, characterized in that, Before the step of filling the edge region and the middle region respectively in a manner of staggered distribution of laser vectors, so that the positions of the ends of the laser vectors of adjacent scan lines in the edge region away from the edge are staggered, and the starting positions of the laser vectors of adjacent scan lines in the middle region are staggered, to obtain a filled slice layer, it further includes: Obtain filling parameters, where the filling parameters include laser vector length, laser vector spacing, scan line spacing, and laser scanning direction; According to the filling parameters, perform path filling on each slice layer in a manner of staggered distribution of laser vectors.
5. The interleaved additive manufacturing method according to claim 1, wherein The step of scanning the strip-shaped tooth-like regions in sequence to complete the printing of the part to be printed includes: For the scanning of any layer of slice layer, scan the strip-shaped tooth-like region at the starting position, and then scan the next strip-shaped tooth-like region until all the strip-shaped tooth-like regions are scanned; Rotate the laser device by a preset angle to perform the scanning of the next layer of slice layer; Complete the scanning of all slice layers to obtain the part to be printed.
6. The staggered additive manufacturing method according to claim 1, wherein, After the step of scanning the strip-shaped tooth-like regions in sequence to complete the printing of the part to be printed, it further includes: Use wire cutting to separate the printed part and the substrate to obtain a separated part; Perform grinding treatment on the separated part to obtain a target part.
7. The staggered additive manufacturing method according to claim 1, wherein In each of the bar-shaped tooth-like regions, the scanning directions of adjacent scanning lines are opposite.
8. An interleaved additive manufacturing device, characterized in that, Comprising: A three-dimensional model acquisition module, configured to acquire a three-dimensional model of a part to be printed, and perform slicing processing on the three-dimensional model to obtain a plurality of slice layers; the slice layers include an edge region and a middle region; A path filling module, configured to fill the edge region and the middle region respectively in a manner of staggered distribution of laser vectors, so that the positions of the ends of the laser vectors of adjacent scanning lines in the edge region away from the edge are staggered, and the starting positions of the laser vectors of adjacent scanning lines in the middle region are staggered, to obtain a filled slice layer; A region division module, configured to divide the filled slice layer according to the filled laser vectors to obtain a plurality of bar-shaped tooth-like regions; each row of scanning lines in each of the bar-shaped tooth-like regions includes one laser vector; A printing module, configured to sequentially scan the bar-shaped tooth-like regions to complete the printing of the part to be printed.
9. An interleaved additive manufacturing device, characterized in that, Comprising: A communication unit / communication interface, configured to acquire a three-dimensional model of a part to be printed, and perform slicing processing on the three-dimensional model to obtain a plurality of slice layers; the slice layers include an edge region and a middle region; A processing unit / processor, configured to fill the edge region and the middle region respectively in a manner of staggered distribution of laser vectors, so that the positions of the ends of the laser vectors of adjacent scanning lines in the edge region away from the edge are staggered, and the starting positions of the laser vectors of adjacent scanning lines in the middle region are staggered, to obtain a filled slice layer; Divide the filled slice layer according to the filled laser vectors to obtain a plurality of bar-shaped tooth-like regions; each row of scanning lines in each of the bar-shaped tooth-like regions includes one laser vector; Sequentially scan the bar-shaped tooth-like regions to complete the printing of the part to be printed.
10. A computer-readable storage medium, characterized in that, Instructions are stored in the computer-readable storage medium, and when the instructions are run, the staggered additive manufacturing method according to any one of claims 1 to 7 is implemented.