Laser stereo scanning additive manufacturing method, device and equipment

Abstract

The present invention discloses a laser stereo scanning additive manufacturing method, device and equipment, which relates to the field of additive manufacturing technology, in order to solve the problem that the existing scanning method using a two-dimensional plane will cause thermal stress to accumulate continuously and be transferred along the forming structure to the edge of the part, resulting in large deformation or cracking of the edge of the part. A laser stereo scanning additive manufacturing method includes: obtaining a three-dimensional model of the part to be printed; dividing the three-dimensional model into at least one scanning layer according to a preset height; dividing the scanning layer into multiple scanning areas; for any scanning area, performing stereo scanning on each scanning block in the scanning area in turn until the scanning height reaches the preset height or the outline of the part to be printed, and scanning the next scanning block; scanning the remaining scanning areas until manufacturing is completed. The laser stereo scanning additive manufacturing method provided by the present invention is used to perform stereo scanning on parts, change the stress transfer path, and reduce the risk of deformation or cracking of the edge of the part.

Description

Technical Field

[0001] The present invention relates to the field of additive manufacturing technology, and in particular to a laser stereo scanning additive manufacturing method, device and equipment. Background Art

[0002] Laser additive manufacturing technology is an additive manufacturing technology that uses laser as the energy source. Laser has the characteristics of high energy density and can realize the manufacturing of difficult-to-process metals. At the same time, laser additive manufacturing technology also has the advantage of not being restricted by part structure and can be used for the processing and manufacturing of complex structures, difficult-to-process and thin-walled parts. At present, the materials used in laser additive manufacturing technology have covered titanium alloys, high-temperature alloys, iron-based alloys, aluminum alloys, refractory alloys, etc.

[0003] The existing scanning method of laser additive manufacturing is to physically divide the three-dimensional model of the part into several two-dimensional plane figures along the forming direction and scan them from small to large according to the size of the Z value. Due to the process characteristics of additive manufacturing, the part will accumulate a certain amount of thermal stress during the forming process. When the part structure size is large and the forming cycle is long, the thermal stress continues to accumulate and is transmitted along the formed structure to the edge of the part, which can easily lead to large stress deformation or stress cracking at the edge of the part. Summary of the Invention

[0004] The purpose of the present invention is to provide a laser stereo scanning additive manufacturing method, device and equipment to solve the problem that the existing additive manufacturing method using a two-dimensional plane scanning method causes thermal stress to continuously accumulate and be transmitted along the forming structure to the edge of the part, which can easily lead to large deformation or cracking of the part edge.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a laser stereo scanning additive manufacturing method, comprising:

[0007] Obtain a three-dimensional model of the part to be printed;

[0008] Dividing the three-dimensional model into at least one scanning layer according to a preset height along a forming direction of the part to be printed;

[0009] Dividing the scanning layer into a plurality of scanning areas, each of which includes a plurality of scanning blocks, and any two adjacent scanning blocks in each of the scanning areas are not connected;

[0010] For any scanning area, each scanning block in the scanning area is sequentially scanned in three dimensions until the scanning height reaches the preset height or the outline of the part to be printed completes the scanning of the scanning block, and then the scanning of the next scanning block is performed;

[0011] The remaining scanning areas are scanned in sequence until the laser stereo scanning additive manufacturing is completed.

[0012] Compared with the prior art, the present invention provides a laser stereo scanning additive manufacturing method, which divides the three-dimensional model into at least one scanning layer according to a preset height along the forming direction of the part to be printed; divides the scanning layer into multiple scanning areas, and any two adjacent scanning blocks in each divided scanning area are not connected; for any scanning area, each scanning block in the scanning area is stereo scanned in turn until the scanning height reaches the preset height or the scanning block scans the outline of the part to be printed, and then the next scanning block is scanned; by first forming the scanning block to a certain height and then scanning the next scanning block, the formed scanning blocks are not connected during this process, and the stress accumulated in each scanning block will produce local deformation, thereby eliminating part of the stress. At the same time, by performing stereo scanning on the scanning block and scanning the next scanning area after scanning one scanning area, the forming time is much longer than the single-layer scanning time, further eliminating stress and changing the transmission path of thermal stress inside the part. When the laser stereo scanning additive manufacturing is completed, the stress transmitted to the edge of the part after the parts are finally connected together is small, and no large deformation or cracking will occur.

[0013] In a second aspect, the present invention provides a laser stereo scanning additive manufacturing device, comprising:

[0014] A three-dimensional model acquisition device, used to acquire a three-dimensional model of the part to be printed;

[0015] a three-dimensional model division module, configured to divide the three-dimensional model into at least one scanning layer according to a preset height along a forming direction of the part to be printed;

[0016] A scanning layer division module, configured to divide the scanning layer into a plurality of scanning areas, each of which includes a plurality of scanning blocks, and any two adjacent scanning blocks in each scanning area are not connected;

[0017] The scanning area additive manufacturing module is used to sequentially perform three-dimensional scanning of each scanning block in any scanning area until the scanning height reaches the preset height or the outline of the part to be printed completes the scanning of the scanning block, and then proceed to scan the next scanning block;

[0018] The additive manufacturing module continues to scan the remaining scanning areas in sequence until the laser stereo scanning additive manufacturing is completed.

[0019] The third invention provides a laser stereo scanning additive manufacturing device, comprising:

[0020] A communication unit / communication interface for obtaining a three-dimensional model of the part to be printed;

[0021] a processing unit / processor, configured to divide the three-dimensional model into at least one scanning layer according to a preset height along a forming direction of the part to be printed;

[0022] Dividing the scanning layer into a plurality of scanning areas, each of which includes a plurality of scanning blocks, and any two adjacent scanning blocks in each of the scanning areas are not connected;

[0023] For any scanning area, each scanning block in the scanning area is sequentially scanned in three dimensions until the scanning height reaches the preset height or the outline of the part to be printed completes the scanning of the scanning block, and then the scanning of the next scanning block is performed;

[0024] The remaining scanning areas are scanned in sequence until the laser stereo scanning additive manufacturing is completed.

[0025] The technical effects achieved by the device-type solution provided in the second aspect and the equipment-type solution provided in the third aspect are the same as those of the method-type solution provided in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 A schematic diagram of the structure of a part manufactured using a two-dimensional planar method in the prior art;

[0028] Figure 2 A flow chart of a laser stereo scanning additive manufacturing method provided by the present invention;

[0029] Figure 3 A top view of the additive manufacturing process of the four scanning areas provided by the present invention;

[0030] Figure 4 A schematic structural diagram of a part manufactured by the laser stereo scanning additive manufacturing method provided by the present invention;

[0031] Figure 5 A schematic diagram of the positional relationship between two adjacent scanning layers provided by the present invention;

[0032] Figure 6 A schematic diagram of the structure of the scanning block provided by the present invention with inclined side walls;

[0033] Figure 7 A schematic structural diagram of a laser stereo scanning additive manufacturing device provided by the present invention;

[0034] Figure 8This is a schematic structural diagram of a laser stereo scanning additive manufacturing device provided by the present invention.

[0035] Reference numerals:

[0036] 1-first scanning area, 2-second scanning area, 3-third scanning area, 4-fourth scanning area, 5-fifth scanning area. DETAILED DESCRIPTION

[0037] To facilitate a clear description of the technical solutions of the embodiments of the present invention, the words "first" and "second" are used in the embodiments of the present invention to distinguish between identical or similar items with substantially the same functions and effects. For example, the first threshold and the second threshold are merely used to distinguish between different thresholds and do not limit their order. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0038] It should be noted that, in the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0039] In the present invention, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can 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, c can be single or multiple.

[0040] The existing scanning method of additive manufacturing is to physically divide the three-dimensional model of the part into several two-dimensional plane figures along the forming direction and scan them layer by layer. Even if the scanning and filling are done in intervals in different areas, the stress in each area will be superimposed on each other after the single-layer scanning is completed and transferred to the edge of the part, which will cause large deformation and cracking of the edge. Figure 1 As shown in the figure, the edge deformation of the part obtained by scanning the two-dimensional plane layer by layer is much greater than the deformation at the center of the part.

[0041] To address these issues, the present invention provides a laser stereo-scanning additive manufacturing method, device, and equipment. This method segments a part into regions, transforming them into three-dimensional scanning. Localized deformation in intersecting regions dissipates some stress, altering the stress transfer path within the part and reducing the risk of excessive edge deformation or stress tearing. This is described in detail below.

[0042] Figure 2 A flow chart of a laser stereo scanning additive manufacturing method provided by the present invention is as follows: Figure 2 As shown, the method includes the following steps:

[0043] Step 201: Obtain a three-dimensional model of the part to be printed.

[0044] The 3D model is constructed in 3D software based on the structural data of the part to be printed.

[0045] Step 202: Divide the three-dimensional model into at least one scanning layer according to a preset height along the forming direction of the part to be printed.

[0046] The preset height is determined according to demand and can be 10mm~15mm. The three-dimensional model can be divided into one or more scanning layers according to the preset height. Specifically, if the height in the part forming direction is less than or equal to the preset height, the three-dimensional model is only divided into one scanning layer. If the height in the part forming direction is greater than the preset height, the part is divided into n scanning layers according to the preset height. At least the heights of the first n-1 scanning layers are the same, which is the preset height, and n is a positive integer greater than 1.

[0047] Step 203: Divide the scanning layer into multiple scanning areas, each of which includes multiple scanning blocks. Any two adjacent scanning blocks in each scanning area are not connected.

[0048] When the part contains only one scanning layer, the steps for dividing the scanning layer into multiple scanning areas are as follows: first, obtain the cross section of the bottom surface of the scanning layer, and determine the shape and size of the divided individual areas according to the cross-sectional shape and size of the part. For example, the individual area can be square, rectangular, etc., and the size can be 200mm*200mm. The structure of the individual area cannot be too small, otherwise it will not cause local deformation; then divide the cross section of the scanning layer according to the determined individual areas, such as Figure 3 As shown in (d), the individual regions are squares, dividing the cross section of the scanned layer into 81 individual regions of uniform size and shape. If the cross section of the scanned layer is irregular, the cross section is divided into a central region and an edge region. The individual regions in the central region are uniformly square, while the individual regions in the edge region of the cross section are fractions of a square.

[0049] After dividing the cross section of the scanning layer into separate areas, the scanning layer is divided three-dimensionally along the forming direction according to the contours of each separate area to obtain multiple scanning blocks. The height of each scanning block is a preset height or the height of the part contour. If the part is an irregular part, the edge of the part is divided according to the specific contour of the part. During the three-dimensional scanning process, the height of each scanning block in each scanning layer changes continuously according to the specific structure of the part. The specific scanning layer includes an edge area and a middle area. When the separate area is a square, the separate area corresponding to the scanning block in the middle area is a square, and the separate area corresponding to the scanning block in the edge area is a part of the square, and the contour of the scanning block is the contour of the part.

[0050] The scanning blocks of the scanning layer are divided into sections according to the preset scanning times. The principle of dividing the scanning areas is that the scanning blocks in each scanning area are not connected, and the intervals between adjacent scanning blocks can be equal. The number of scanning areas can be determined according to the needs, and at least two scanning areas are divided. When scanning each scanning layer, one scanning area is scanned first and then the next scanning area is scanned. The number of scanning areas determines the number of scans performed on each scanning layer. Figure 3 As shown in (d), the scanning layer is divided into four scanning areas, the first scanning area 1 includes 25 scanning blocks, the second scanning area 2 includes 16 scanning blocks, the third scanning area 3 includes 20 scanning blocks, and the fourth scanning area 4 includes 20 scanning blocks. The two adjacent sides of any scanning block in the second scanning area 2 are connected to the sides of two adjacent scanning blocks in the first scanning area 1, the two opposite sides of any scanning block in the third scanning area 3 are connected to the sides of two adjacent scanning blocks in the first scanning area 1, and the two opposite sides of any scanning block in the fourth scanning area 4 are connected to the sides of two adjacent scanning blocks in the first scanning area 1.

[0051] Afterwards, each scanning block is sliced ​​and path planned. The first scanning area 1 is scanned in the scanning order. The structure of the part after scanning is as follows: Figure 3 As shown in (a), the second scanning area 2 is scanned and filled at the corresponding position, and the part structure formed is as follows Figure 3 As shown in (b), the third scanning area 3 is scanned and filled at the corresponding position, and the part structure formed is as follows Figure 3 As shown in (c), the fourth scanning area 4 is then scanned at the corresponding position, and the resulting part structure is as follows Figure 3As shown in (d), the additive manufacturing of the part is completed. The scanning order of each scanning area can be determined according to the needs. Each scanning block is a separate area during each scan. There is no connection between each other. There is no stress transmission between the scanning blocks. The transmission path of the part stress can be disconnected. During the secondary filling scanning process, the stress generated in the early stage is deformed in the local area to consume part stress to reduce the forming stress from being transmitted to the edge of the part, reducing deformation. The final formed part structure is as follows Figure 4 As shown, the part exhibits a range of small wave deformations.

[0052] As an optional method, when the part is thick, the part is divided into at least two scanning layers. When the scanning layer includes a first scanning layer and a second scanning layer, the scanning layer is divided into multiple scanning areas, including:

[0053] Obtain a cross-section of a first scanning layer; divide the cross-section of the first scanning layer into separate areas of identical size and shape; divide the scanning layer along a forming direction according to the contours of the separate areas to obtain a plurality of scanning blocks; partition the plurality of scanning blocks of the first scanning layer according to a preset number of scans to obtain a plurality of first-layer scanning areas, where the number of first-layer scanning areas is the same as the preset number of scans; in each first-layer scanning area, adjacent scanning blocks are spaced equally apart, and the division of the first scanning layer is the same as the division described above when only one scanning layer is included, and will not be repeated here.

[0054] When dividing the second scanning layer, it is necessary to determine the stress area of ​​the first scanning layer; the second scanning layer is divided according to the stress area and the individual area to obtain multiple scanning blocks, and the center of each scanning block of the second scanning layer covers the center of the stress area of ​​the first scanning layer, that is, during the forming process, the tensile force area of ​​the second scanning layer covers the stress area of ​​the first scanning layer; according to the characteristics of additive manufacturing, the stress direction of the scanned scanning block is the edge of the scanning block, and the specific combination Figure 5 To explain, such as Figure 5 As shown in FIG, the stressed area of ​​the four scanning blocks intersecting at one point in the first scanning area 1, the second scanning area 2, the third scanning area 3, and the fourth scanning area 4 is the center area of ​​the square formed by the four scanning blocks. When the second scanning layer is divided into separate areas, the center point of each separate area is located above the center of the four scanning blocks intersecting at one point in the first scanning layer, as shown in FIG. Figure 5 The center of the fifth scanning area 5 in the image overlaps the center of the square formed by the four scanning blocks in the first scanning area 1, the second scanning area 2, the third scanning area 3, and the fourth scanning area 4 intersecting at one point. When the individual area is a square, the individual area corresponding to the scanning block in the edge area of ​​the second scanning layer is a part of the square, and the edge contour is divided according to the part contour. It can be understood that for the sake of convenience, Figure 5Only one scanning area in the second scanning layer is shown. The second scanning layer is also partitioned according to the preset scanning times to obtain multiple scanning areas. When the number of scanning layers is greater than two, all remaining scanning layers are divided according to the above method.

[0055] Step 204: For any scanning area, perform three-dimensional scanning on each scanning block in the scanning area in sequence until the scanning height reaches the preset height or the outline of the part to be printed completes the scanning of the scanning block, and then proceed to scan the next scanning block;

[0056] Specifically, according to the planned printing path, the first scanning block in the scanning area is scanned along the forming direction. After the scanning is completed, the height of the laser is lowered to the starting height, and the laser is moved to the scanning starting position of the next scanning block to start scanning. This process is repeated until the scanning of a scanning area is completed.

[0057] The remaining scanning areas of the current scanning layer are scanned continuously according to the preset scanning sequence until the scanning of the current scanning layer is completed.

[0058] Step 205: Scan the remaining scanning areas in sequence until the laser stereo scanning additive manufacturing is completed.

[0059] As an optional method, the side walls of the scanning blocks in the forming direction have an inclined angle, and the side walls of two adjacent scanning blocks match each other. Figure 6 To illustrate, in order to increase the combined area of ​​adjacent scanning blocks and improve the stability of the formed parts, when dividing the scanning blocks, the two opposite sides of the scanning blocks in the forming direction can be set as inclined surfaces, such as Figure 6 As shown, the cross-sectional area of ​​the scanning block in the vertical direction is a trapezoid. The shapes of two adjacent scanning blocks are complementary.

[0060] As an optional method, the part to be printed also includes an irregular structure, and before scanning the three-dimensional model of the regular structure, it also includes: scanning the three-dimensional model of the irregular structure, and executing an instruction to scan the three-dimensional model of the regular structure after completing the scanning.

[0061] Specifically, in actual applications, parts are usually irregular in shape, including irregular structures such as protrusions and depressions. Initially, it is necessary to scan and print irregular structures such as protrusions and depressions. As the local forming thickness increases, the local stiffness of the substrate can be enhanced.

[0062] The above mainly introduces the solution provided by the embodiment of the present invention from the perspective of additive manufacturing of parts. It can be understood that in order to realize the above functions, it includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel 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.

[0063] The embodiments of the present invention can be divided into functional modules according to the above-mentioned method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into a single processing module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present invention is illustrative and is only a logical functional division. In actual implementation, other division methods may be used.

[0064] In the case of dividing each functional module into corresponding functional modules, Figure 7 FIG1 shows a schematic structural diagram of a laser stereo scanning additive manufacturing device provided by the present invention. Figure 7 As shown, the device includes:

[0065] The three-dimensional model acquisition device 701 is used to acquire a three-dimensional model of the part to be printed;

[0066] A three-dimensional model division module 702 is configured to divide the three-dimensional model into at least one scanning layer according to a preset height along a forming direction of the part to be printed;

[0067] A scanning layer division module 703 is configured to divide the scanning layer into a plurality of scanning regions, each of which includes a plurality of scanning blocks, and any two adjacent scanning blocks in each scanning region are not connected;

[0068] The scanning area additive manufacturing module 704 is used to sequentially perform three-dimensional scanning of each scanning block in any scanning area until the scanning height reaches the preset height or the outline of the part to be printed completes the scanning of the scanning block, and then proceed to scan the next scanning block;

[0069] The continuing additive manufacturing module 705 is used to scan the remaining scanning areas in sequence until the laser stereo scanning additive manufacturing is completed.

[0070] Optionally, the scanning layer includes a first scanning layer and a second scanning layer; the scanning layer division module 703 may include:

[0071] A cross-section acquisition unit for the first scanning layer, configured to acquire a cross-section of the first scanning layer;

[0072] a separate region dividing unit, configured to divide the cross section of the first scanning layer into a plurality of separate regions;

[0073] A first scanning layer three-dimensional division unit is configured to divide the first scanning layer along a forming direction according to the contour of the individual area to obtain a plurality of scanning blocks;

[0074] a scanning area division unit, configured to divide the plurality of scanning blocks of the first scanning layer into partitions according to a preset number of scans to obtain a plurality of first scanning areas, wherein the number of the first scanning areas is equal to the preset number of scans; and an interval between two adjacent scanning blocks in each of the first scanning areas is equal;

[0075] a stressed region confirming unit, configured to determine a stressed region of the first scanning layer;

[0076] a second scanning layer dividing unit, configured to divide the second scanning layer according to the stressed area and the separate area to obtain a plurality of scanning blocks, wherein the center of each scanning block of the second scanning layer overlaps the center of the stressed area of ​​the first scanning layer;

[0077] The remaining scanning layer division unit is used to divide the second scanning layer into zones according to the preset number of scans to obtain a plurality of scanning areas, and so on until the division of all scanning layers is completed.

[0078] Optionally, the side walls of the scanning blocks in the forming direction have an inclined angle, and the side walls of two adjacent scanning blocks match each other.

[0079] Optionally, the scanning area additive manufacturing module 704 may include:

[0080] The scanning block scanning unit is used to scan the first scanning block in the scanning area along the forming direction, lower the height of the laser after the scanning is completed, and move the laser to the scanning starting position of the next scanning block to start scanning, and so on until the scanning of a scanning area is completed;

[0081] The remaining scanning area scanning unit is used to continue scanning the remaining scanning areas of the current scanning layer according to a preset scanning sequence until the scanning of the current scanning layer is completed.

[0082] Optionally, the separate area is a square, the scanning layer includes an edge area, and the separate area corresponding to the scanning block in the edge area is a part of the square.

[0083] Optionally, each scanning layer includes a first scanning area, a second scanning area, a third scanning area and a fourth scanning area; the two adjacent sides of any scanning block in the second scanning area are connected to the sides of two adjacent scanning blocks in the first scanning area, the two opposite sides of any scanning block in the third scanning area are connected to the sides of two adjacent scanning blocks in the first scanning area, and the two opposite sides of any scanning block in the fourth scanning area are connected to the sides of two adjacent scanning blocks in the first scanning area.

[0084] Optionally, the part to be printed also includes an irregular structure, and the device can also be used to scan the three-dimensional model of the irregular structure, and after completing the scanning, execute an instruction to scan the three-dimensional model of the regular structure.

[0085] The above-mentioned laser stereo scanning additive manufacturing device is a virtual device, including a virtual unit and a virtual functional module. This device is built on the laser additive manufacturing equipment for use. At the same time, the laser stereo scanning additive manufacturing device provided by the present invention corresponds to a laser stereo scanning additive manufacturing method, and acts on the laser additive manufacturing equipment.

[0086] In the case of using the corresponding integrated unit, Figure 8 The figure shows a schematic diagram of the structure of a laser stereo scanning additive manufacturing device provided by the present invention. Figure 8 As shown, the laser stereo scanning additive manufacturing equipment includes:

[0087] A communication unit / communication interface for obtaining a three-dimensional model of the part to be printed;

[0088] a processing unit / processor, configured to divide the three-dimensional model into at least one scanning layer according to a preset height along a forming direction of the part to be printed;

[0089] Dividing the scanning layer into a plurality of scanning areas, each of which includes a plurality of scanning blocks, and any two adjacent scanning blocks in each of the scanning areas are not connected;

[0090] For any scanning area, each scanning block in the scanning area is sequentially scanned in three dimensions until the scanning height reaches the preset height or the outline of the part to be printed completes the scanning of the scanning block, and then the scanning of the next scanning block is performed;

[0091] The remaining scanning areas are scanned in sequence until the laser stereo scanning additive manufacturing is completed.

[0092] The above-mentioned laser stereo scanning additive manufacturing equipment is built on the laser additive manufacturing equipment for use. At the same time, the laser stereo scanning additive manufacturing equipment provided by the present invention corresponds to a laser stereo scanning additive manufacturing method and acts on the laser additive manufacturing equipment.

[0093] In some possible implementations, the aforementioned laser stereo scanning additive manufacturing device may further include a storage module for storing program codes and data of the base station.

[0094] Among them, the processing module can be a processor or controller, for example, 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 the various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication module can be a transceiver, a transceiver circuit or a communication interface, and the like. The storage module can be a memory.

[0095] like Figure 8 As shown, the processor can 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 communication interface can be one or more. The communication interface can use any device such as a transceiver for communicating with other devices or communication networks.

[0096] like Figure 8 As shown, the terminal device may further include a communication line. The communication line may include a path for transmitting information between the components.

[0097] Optional, such as Figure 8 As shown, the terminal device may further include a memory. The memory is used to store computer-executable instructions for executing the solution of the present invention, and the execution is controlled by the processor. The processor is used to execute the computer-executable instructions stored in the memory, thereby implementing the method provided by the embodiment of the present invention.

[0098] like Figure 8 As shown, 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 disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this. The memory can exist independently and be connected to the processor through a communication line. The memory can also be integrated with the processor.

[0099] In a specific implementation, as an embodiment, Figure 8 As shown, the processor may include one or more CPUs, such as Figure 8 CPU0 and CPU1 in.

[0100] In a specific implementation, as an embodiment, Figure 8 As shown, the terminal device may include multiple processors, such as Figure 8 Each of these processors can be a single-core processor or a multi-core processor.

[0101] In the above embodiments, all or part of the embodiments can be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present invention are performed 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 device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. 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, hard disk, or magnetic tape; an optical medium, such as a digital video disc (DVD); or a semiconductor medium, such as a solid-state drive (SSD).

[0102] Although the present invention is described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art can understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit can implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0103] Although the present invention has been described with reference to specific features and embodiments thereof, it will be apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the invention. Accordingly, this specification and drawings are merely illustrative of the invention as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the invention. It will be apparent that various modifications and variations may be made to the present invention by those skilled in the art without departing from the spirit and scope of the invention. Thus, the present invention is intended to include such modifications and variations as fall within the scope of the claims of the present invention and their equivalents.

Claims

1. A laser stereo scanning additive manufacturing method, characterized in that: include: Obtain a three-dimensional model of the part to be printed; Dividing the three-dimensional model into at least one scanning layer according to a preset height along a forming direction of the part to be printed; The scanning layer is divided into a plurality of scanning areas, each of which includes a plurality of scanning blocks, wherein any two adjacent scanning blocks in each scanning area are not connected; the side walls of the scanning blocks in the forming direction have an inclined angle, and the side walls of two adjacent scanning blocks match each other; For any scanning area, each scanning block in the scanning area is sequentially scanned in three dimensions until the scanning height reaches the preset height or the outline of the part to be printed completes the scanning of the scanning block, and then the scanning of the next scanning block is performed; Scanning the remaining scanning areas in sequence until the laser stereo scanning additive manufacturing is completed; The scanning layer includes a first scanning layer and a second scanning layer; and dividing the scanning layer into a plurality of scanning areas includes: obtaining a cross section of a first scanning layer; Dividing the cross section of the first scanning layer into a plurality of separate areas; wherein the separate areas are square; Dividing the first scanning layer along a forming direction according to the contour of the individual area to obtain a plurality of scanning blocks; Dividing the plurality of scanning blocks of the first scanning layer according to a preset scanning number to obtain a plurality of first layer scanning areas, wherein the number of the first layer scanning areas is the same as the preset scanning number; and the interval between two adjacent scanning blocks in each first layer scanning area is equal; determining a stressed region of the first scanning layer; Dividing the second scanning layer according to the stressed area and the separate area to obtain a plurality of scanning blocks, wherein the center of each scanning block of the second scanning layer overlaps the center of the stressed area of ​​the first scanning layer; Dividing the second scanning layer according to the preset number of scans to obtain a plurality of scanning areas, and so on until all scanning layers are divided; For any scanning area, each scanning block in the scanning area is sequentially three-dimensionally scanned until the scanning height reaches the preset height or the outline of the part to be printed completes the scanning of the scanning block, and then the scanning of the next scanning block is performed, including: Scan the first scanning block in the scanning area along the forming direction. After the scanning is completed, lower the height of the laser and move the laser to the scanning starting position of the next scanning block to start scanning. This process is repeated until the scanning of a scanning area is completed. The remaining scanning areas of the current scanning layer are scanned continuously according to the preset scanning sequence until the scanning of the current scanning layer is completed.

2. The laser stereo scanning additive manufacturing method according to claim 1, characterized in that: The scanning layer includes an edge area, and the individual area corresponding to the scanning block in the edge area is a part of a square.

3. The laser stereo scanning additive manufacturing method according to claim 2, characterized in that: Each scanning layer includes a first scanning area, a second scanning area, a third scanning area and a fourth scanning area; the two adjacent side edges of any scanning block in the second scanning area are connected to the side edges of two adjacent scanning blocks in the first scanning area, the two opposite side edges of any scanning block in the third scanning area are connected to the side edges of two adjacent scanning blocks in the first scanning area, and the two opposite side edges of any scanning block in the fourth scanning area are connected to the side edges of two adjacent scanning blocks in the first scanning area.

4. The laser stereo scanning additive manufacturing method according to claim 1, characterized in that: The parts to be printed also include irregular structures. Before scanning the three-dimensional model of the regular structure, the process also includes: scanning the three-dimensional model of the irregular structure, and executing an instruction to scan the three-dimensional model of the regular structure after the scanning is completed.

5. The laser stereo scanning additive manufacturing method according to claim 1, characterized in that: The three-dimensional model includes n scanning layers, at least the first n-1 scanning layers have the same height, and n>1.

6. A laser stereo scanning additive manufacturing device, characterized in that: include: A three-dimensional model acquisition device, used to acquire a three-dimensional model of the part to be printed; a three-dimensional model division module, configured to divide the three-dimensional model into at least one scanning layer according to a preset height along a forming direction of the part to be printed; A scanning layer division module, configured to divide the scanning layer into a plurality of scanning areas, each of which includes a plurality of scanning blocks, and any two adjacent scanning blocks in each scanning area are not connected; The scanning layer includes a first scanning layer and a second scanning layer; the scanning layer division module includes: A cross-section acquisition unit for the first scanning layer, configured to acquire a cross-section of the first scanning layer; A separate area division unit, configured to divide the cross section of the first scanning layer into a plurality of separate areas; the separate areas are square; A first scanning layer three-dimensional division unit is configured to divide the first scanning layer along a forming direction according to the contour of the individual area to obtain a plurality of scanning blocks; a scanning area division unit, configured to divide the plurality of scanning blocks of the first scanning layer into partitions according to a preset number of scans to obtain a plurality of first-layer scanning areas, wherein the number of the first-layer scanning areas is equal to the preset number of scans; and an interval between two adjacent scanning blocks in each first-layer scanning area is equal; a stressed region confirming unit, configured to determine a stressed region of the first scanning layer; a second scanning layer dividing unit, configured to divide the second scanning layer according to the stressed area and the separate area to obtain a plurality of scanning blocks, wherein the center of each scanning block of the second scanning layer overlaps the center of the stressed area of ​​the first scanning layer; a remaining scanning layer division unit, configured to divide the second scanning layer into partitions according to the preset number of scans to obtain a plurality of scanning areas, and so on until the division of all scanning layers is completed; The scanning area additive manufacturing module is used to sequentially perform three-dimensional scanning of each scanning block in any scanning area until the scanning height reaches the preset height or the outline of the part to be printed is scanned by the scanning block, and then scan the next scanning block; the side walls of the scanning blocks in the forming direction have an inclined angle, and the side walls of two adjacent scanning blocks match each other; The scanning area additive manufacturing module includes: The scanning block scanning unit is used to scan the first scanning block in the scanning area along the forming direction, lower the height of the laser after the scanning is completed, and move the laser to the scanning starting position of the next scanning block to start scanning, and so on until the scanning of a scanning area is completed; The remaining scanning area scanning unit is used to continue scanning the remaining scanning area of ​​the current scanning layer according to a preset scanning order until the scanning of the current scanning layer is completed; The additive manufacturing module continues to scan the remaining scanning areas in sequence until the laser stereo scanning additive manufacturing is completed.

7. A laser stereo scanning additive manufacturing device, characterized in that: include: A communication unit / communication interface for obtaining a three-dimensional model of the part to be printed; a processing unit / processor, configured to divide the three-dimensional model into at least one scanning layer according to a preset height along a forming direction of the part to be printed; The scanning layer is divided into a plurality of scanning areas, each of which includes a plurality of scanning blocks, wherein any two adjacent scanning blocks in each scanning area are not connected; the side walls of the scanning blocks in the forming direction have an inclined angle, and the side walls of two adjacent scanning blocks match each other; For any scanning area, each scanning block in the scanning area is sequentially scanned in three dimensions until the scanning height reaches the preset height or the outline of the part to be printed completes the scanning of the scanning block, and then the scanning of the next scanning block is performed; The remaining scanning areas are scanned sequentially until the laser stereo scanning additive manufacturing is completed; the scanning layer includes a first scanning layer and a second scanning layer; and the scanning layer is divided into a plurality of scanning areas, including: obtaining a cross section of a first scanning layer; Dividing the cross section of the first scanning layer into a plurality of separate areas; wherein the separate areas are square; Dividing the first scanning layer along a forming direction according to the contour of the individual area to obtain a plurality of scanning blocks; Dividing the plurality of scanning blocks of the first scanning layer according to a preset scanning number to obtain a plurality of first layer scanning areas, wherein the number of the first layer scanning areas is the same as the preset scanning number; and the interval between two adjacent scanning blocks in each first layer scanning area is equal; determining a stressed region of the first scanning layer; Dividing the second scanning layer according to the stressed area and the separate area to obtain a plurality of scanning blocks, wherein the center of each scanning block of the second scanning layer overlaps the center of the stressed area of ​​the first scanning layer; Dividing the second scanning layer according to the preset number of scans to obtain a plurality of scanning areas, and so on until all scanning layers are divided; For any scanning area, each scanning block in the scanning area is sequentially three-dimensionally scanned until the scanning height reaches the preset height or the outline of the part to be printed completes the scanning of the scanning block, and then the scanning of the next scanning block is performed, including: Scan the first scanning block in the scanning area along the forming direction. After the scanning is completed, lower the height of the laser and move the laser to the scanning starting position of the next scanning block to start scanning. This process is repeated until the scanning of a scanning area is completed. The remaining scanning areas of the current scanning layer are scanned continuously according to the preset scanning sequence until the scanning of the current scanning layer is completed.

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