Laser additive manufacturing scanning method and device, electronic equipment and storage medium

Abstract

The invention provides a laser additive manufacturing scanning method and device, electronic equipment and a storage medium, and relates to the technical field of additive manufacturing, and the laser additive manufacturing scanning method comprises the steps that an obtained part three-dimensional model is sliced, and slice information of multiple layers of slices of the part three-dimensional model is obtained; based on a preset scanning path set, determining a scanning path corresponding to the slice according to the slice information; generating a scanning vector rule corresponding to the slice according to the crystal grain morphology; and performing layer-by-layer laser scanning according to the scanning paths and the scanning vector rules corresponding to all the slices. According to the generated scanning vector rule and the scanning path, laser scanning is carried out, and the performance of the additive manufacturing part can be effectively improved.

Description

Technical Field

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

[0002] Laser additive manufacturing technology, as an important branch of additive manufacturing, uses a high-energy laser beam as a heat source to selectively melt metal powder or melt metal wire to build parts layer by layer. This technology has many advantages, such as the ability to quickly manufacture parts with complex geometric structures, reduce material waste, and shorten product development cycles. With the continuous advancement of technology, additive manufacturing has been widely used in the fields of medical, aerospace, and automobile manufacturing.

[0003] Conventional additive manufacturing uses a pre-set laser scanning vector to perform laser scanning according to a scanning path, thereby melting the material powder layer by layer to obtain the corresponding parts. However, since the pre-set laser vector remains unchanged, the overall microstructure of the printed parts is basically the same, resulting in the inability to meet the differentiated strength requirements of the parts at different positions. Summary of the invention

[0004] The problem solved by the present invention is how to improve the strength of different positions of a part.

[0005] In order to solve the above problems, the present invention provides a laser additive manufacturing scanning method, device, electronic equipment and storage medium.

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

[0007] Slicing the acquired three-dimensional model of the part to obtain slice information of multi-layer slices of the three-dimensional model of the part;

[0008] Based on a preset scanning path set, determining a scanning path corresponding to the slice according to the slice information;

[0009] Obtaining a scanning vector rule corresponding to the slice according to the grain morphology corresponding to each position in the slice information;

[0010] Laser scanning is performed layer by layer according to the scanning paths and scanning vector rules corresponding to all the slices.

[0011] Optionally, determining a scanning path corresponding to the slice according to the slice information includes:

[0012] Determine the size of the slice according to the slice information;

[0013] The scanning path set is screened according to the slice size to obtain the scanning path.

[0014] Optionally, obtaining a scanning vector rule corresponding to the slice according to the grain morphology corresponding to each position in the slice information includes:

[0015] Generate a corresponding scanning vector length according to the grain morphology corresponding to each position in the slice information;

[0016] The scan vector rule corresponding to the slice is generated according to all the scan vector lengths and the corresponding positions.

[0017] Optionally, generating a corresponding scanning vector length according to the grain morphology corresponding to each position in the slice information includes:

[0018] When the grain morphology belongs to a preset threshold range, determining the corresponding scanning vector length according to the grain morphology and a preset corresponding relationship;

[0019] When the grain morphology does not belong to the threshold range, the scanning vector length is determined according to a preset limit scanning vector length.

[0020] Optionally, the limit scan vector length includes a preset maximum limit scan vector length and a minimum limit scan vector length; and determining the scan vector length according to the preset limit scan vector length includes:

[0021] When the grain morphology is smaller than the lower limit of the threshold range, determining the minimum limit scanning vector length as the corresponding scanning vector length;

[0022] When the grain morphology is greater than the upper limit of the threshold range, the maximum limit scanning vector length is determined as the corresponding scanning vector length.

[0023] Optionally, slicing the acquired three-dimensional model of the part to obtain slicing information of multi-layer slices of the three-dimensional model of the part includes:

[0024] Setting a corresponding slice thickness according to the three-dimensional model of the part;

[0025] The three-dimensional model of the part is sliced ​​according to the slice thickness to obtain corresponding multiple layers of the slices, and the slice information corresponding to each layer of the slices is determined.

[0026] Optionally, the performing layer-by-layer laser scanning according to the scanning paths and the scanning vector rules corresponding to all the slices includes:

[0027] Determine the corresponding laser power and scanning speed according to the length of each scanning vector in the scanning vector rule;

[0028] Based on the scanning path, laser scanning is performed according to the laser power and the scanning speed corresponding to the total scanning vector length.

[0029] In a second aspect, a laser additive manufacturing scanning device comprises:

[0030] An acquisition module, used for slicing the acquired three-dimensional model of the part to obtain slicing information of multi-layer slices of the three-dimensional model of the part;

[0031] A path selection module, configured to determine a scanning path corresponding to the slice according to the slice information based on a preset scanning path set;

[0032] A scanning vector selection module, used for obtaining a scanning vector rule corresponding to the slice according to the grain morphology corresponding to each position in the slice information;

[0033] A control module is used to perform layer-by-layer laser scanning according to the scanning paths and scanning vector rules corresponding to all the slices.

[0034] In a third aspect, the present invention provides an electronic device, including a memory and a processor;

[0035] The memory is used to store computer programs;

[0036] The processor is used to implement the laser additive manufacturing scanning method as described in the first aspect when executing the computer program.

[0037] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the laser additive manufacturing scanning method as described in the first aspect is implemented.

[0038] The beneficial effects of the laser additive manufacturing scanning method, device, electronic device and storage medium of the present invention are as follows: by slicing the three-dimensional model of the part, the multi-layer slicing information of the three-dimensional part model is obtained, and according to the strength requirements of different positions of the part, the corresponding scanning vector rules, that is, the scanning vector lengths of different positions, are determined when performing additive manufacturing of each layer, so that the overall strength of the additive manufacturing part can be improved through the grain morphology generated by different scanning vectors. According to the slicing information of each layer and the grain morphology corresponding to each position in the slice, the appropriate laser scanning path and scanning vector rules are determined, and laser scanning is performed layer by layer according to the scanning path and scanning vector rules corresponding to all slices of the part, so as to obtain a part that meets the strength requirements. The local regulation of the microstructure of the part can also be achieved through the appropriate scanning vector, and parts with gradient microstructures can be manufactured, thereby optimizing the strength of the additive manufacturing part. At the same time, the appropriate laser scanning path helps to control the growth direction and size of the grains, thereby affecting the microstructure of the material and improving the overall performance of the printed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic flow chart of a laser additive manufacturing scanning method according to an embodiment of the present invention;

[0040] Figure 2 is a schematic diagram of a lateral scanning path according to an embodiment of the present invention;

[0041] Figure 3 This is an electron backscatter diffraction technology imaging diagram of an embodiment of the present invention;

[0042] Figure 4 A schematic diagram of parts test results of an embodiment of the present invention;

[0043] Figure 5 It is a structural schematic diagram of a laser additive manufacturing scanning device according to an embodiment of the present invention;

[0044] Figure 6 The figure is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0046] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0047] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0048] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0049] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0050] In the related technology, in the laser additive manufacturing process, laser scanning is a key step, which is used to control the movement of the laser beam and accurately melt it, so as to realize layer-by-layer printing and finally obtain the required parts. In the material deposition process, the laser system accurately controls the movement of the laser beam according to the corresponding scanning path, thereby controlling the laser beam to irradiate the surface of the material powder. The high energy of the laser will melt or solidify the material to obtain the corresponding part slices. After completing the scanning of a layer of slices, the manufacturing bed or platform will lower the height of one layer, that is, the height of the slice, so that the laser can scan the material of the next layer of slices again. This process will be repeated until the entire part is stacked layer by layer, and finally the required part is obtained.

[0051] Furthermore, since different positions of the parts to be manufactured are often subject to loads of different directions and magnitudes, this requires that the parts have different mechanical properties at different positions to cope with complex and changeable working conditions. In the sample preparation process of traditional selective laser melting (SLM), it is difficult to control the local microstructure, so it is difficult to achieve performance changes within a single part. It is impossible to change the vector length of the laser scan to control the microstructure according to the intensity requirements of different positions of the part, that is, the travel distance of the laser beam during a scan cannot be adjusted according to demand, giving the parts different mechanical properties at specific parts positions, and unable to adapt to different working conditions in actual use, thereby limiting the overall performance and service life of the parts.

[0052] In view of the problems existing in the above-mentioned related technologies, the present embodiment provides a laser additive manufacturing scanning method, device, electronic device and storage medium.

[0053] like Figure 1 As shown, an embodiment of the present invention provides a laser additive manufacturing scanning method, comprising:

[0054] S100, slicing the acquired three-dimensional model of the part to obtain slicing information of multi-layer slices of the three-dimensional model of the part.

[0055] Specifically, the acquired three-dimensional model of the part is sliced ​​according to the requirements, so as to obtain multi-layer slices and slice information corresponding to each slice layer, and the slice information includes data information of the slice corresponding to the layer of the part, such as the grain morphology and slice size information corresponding to the slice layer, etc. The thickness of the slice can be set according to the actual part requirements to obtain the part slice that meets the requirements. Among them, the three-dimensional model is usually constructed in Computer-Aided Design (CAD) software. CAD software provides powerful tools and functions to create the corresponding three-dimensional model of the part according to the relevant parameter information of the printed part to represent the physical shape and structure of the design. The 3D model of the part is further decomposed into multiple thin layers (part slices) according to the set thickness through slicing software. Some commonly used additive manufacturing slicing software include: Materialise Magics, a slicing software widely used in metal additive manufacturing, which provides a complete set of solutions for the 3D printing industry to optimize the printing process of metal parts; PreForm, suitable for Sterolithography (SLA) and Digital Light Processing (DLP), commonly used in photo-curing 3D printing; Simplify3D, a slicing software with wide compatibility, supports a variety of additive manufacturing technologies and printer types. In these slicing software, users can set the parameters of the printed parts such as thickness, filling material, density and support structure, and preview the printing of each layer. The slicing software also provides optimization functions to ensure printing quality and efficiency.

[0056] S200, based on a preset scanning path set, determining a scanning path corresponding to the slice according to the slice information.

[0057] Specifically, a scanning path set of different path schemes for laser scanning is pre-constructed. For example, the scanning path set includes a reciprocating scanning path along the horizontal direction and a reciprocating scanning path along the vertical direction, so that the corresponding laser scanning path can be determined according to the part requirements. When it is necessary to select the laser scanning path according to the slicing information, a scanning path that meets the requirements can be selected from the scanning path set, and the laser can be controlled to perform laser scanning according to the scanning path.

[0058] For example, Figure 2As shown, when 316L stainless steel is used as the substrate 3 for printing, any point on the upper surface of the substrate 3 is taken as the origin O to construct a spatial coordinate system, wherein the horizontal direction is set as the horizontal direction and the vertical direction is set as the vertical direction, that is, the horizontal direction of the horizontal direction is the Y-axis direction, the vertical direction of the longitudinal direction is the X-axis direction, and the Z-axis direction is the thickness direction of the slice corresponding to the slice to be printed. The arrowed line in the first slice 1 represents the path of the laser scanning corresponding to the slice, that is, the horizontal reciprocating scanning path. It can be seen that for the first slice 1, the horizontal reciprocating scanning path of the laser scanning is as follows: First, the laser The starting point of the scan is the origin O. According to the arrow direction of route S1, the laser performs a transverse scan along the positive direction of the Y axis. After reaching the edge position a of the first part slice 1, the laser performs a transverse scan along the negative direction of the Y axis from the edge position b according to the arrow direction of route S2. Similarly, after completing the laser scanning of the first layer slice 1 along all the routes in the scanning path, the second layer slice 2 is printed by the same laser scanning method according to the corresponding laser scanning path until all layers are scanned, thereby obtaining the part corresponding to the final required three-dimensional model of the part.

[0059] S300, obtaining a scanning vector rule corresponding to the slice according to the grain morphology corresponding to each position in the slice information.

[0060] Specifically, the slice information contains the corresponding feature information in the slice layer. Since the organizational structures required by different part designs may include different grain morphologies, that is, small grains of different sizes or larger columnar grains, the corresponding laser scanning vector, that is, the laser scanning vector length, can be matched according to the grain morphology at each position inside the slice in the slice information. The scanning vector rule corresponding to the slice is generated according to all positions and the corresponding scanning vector lengths. The corresponding laser power and scanning speed are set according to each scanning vector length, so that the scanning of the scanning vector length is completed at the corresponding position according to the set laser power and scanning speed to obtain the grain morphology corresponding to the position. The corresponding laser power and scanning speed are set according to the different scanning vector lengths for each position in the scanning vector rule, so that the corresponding grain morphology is generated at different corresponding positions of the slice through different laser powers and scanning speeds, that is, the part has the organizational structure corresponding to the slice layer.

[0061] Furthermore, since the length of the laser scanning vector affects the morphology of the molten pool and the temperature field inside the molten pool, different grain growth patterns are caused. In the molten pool formed by a short vector, the cooling rate is fast and the molten pool is narrow, so the cooling crystallization is fast and there is insufficient time and space to form large grains. In the molten pool formed by a long vector, due to the heat accumulation effect, the molten pool cools slowly, the molten pool is wider, and the grains are easy to grow. Therefore, in additive manufacturing, a short vector, such as a vector length of 80-120μm, can be used for laser scanning at locations where grain refinement is required, and a long vector, such as a length greater than 300μm, can be used for laser scanning where columnar crystals are required. Thus, corresponding scanning vectors can be obtained according to the organizational structure at different positions of the part slice, and the scanning vector rules of the part slice are generated according to all the scanning vectors, that is, the laser scanning vectors corresponding to all positions in the part slice. Since the vector length affects the morphology of the molten pool and the temperature field inside the molten pool, different grain growth patterns are caused.

[0062] S400, performing layer-by-layer laser scanning according to the scanning paths and scanning vector rules corresponding to all the slices.

[0063] Specifically, through the scanning vector rule, the laser beam can be controlled to set the scanning vector length at the corresponding position, and laser scanning is performed according to the corresponding scanning path based on the scanning vector rule, so as to gradually construct the part structure corresponding to each layer, and print layer by layer according to the corresponding order of part slicing, and finally obtain a printed three-dimensional part.

[0064] In this embodiment, by slicing the three-dimensional model of the part, multi-layer slicing information of the three-dimensional part model is obtained. According to the strength requirements of different positions of the part, the corresponding scanning vector rules, that is, the scanning vector lengths of different positions, are determined when performing additive manufacturing of each layer, so that the overall strength of the additively manufactured part can be improved through the grain morphology generated by different scanning vectors. According to the slicing information of each layer and the grain morphology corresponding to each position in the slice, the appropriate laser scanning path and scanning vector rules are determined, and laser scanning is performed layer by layer according to the scanning path and scanning vector rules corresponding to all slices of the part, so as to obtain a part that meets the strength requirements. The local regulation of the microstructure of the part can also be achieved through the appropriate scanning vector, and parts with gradient microstructures can be manufactured, thereby optimizing the strength of the additively manufactured parts. At the same time, the appropriate laser scanning path helps to control the growth direction and size of the grains, thereby affecting the microstructure of the material and improving the overall performance of the printed parts.

[0065] Optionally, determining a scanning path corresponding to the slice according to the slice information includes:

[0066] Determine the size of the slice according to the slice information;

[0067] The scanning path set is screened according to the slice size to obtain the scanning path.

[0068] Specifically, according to the geometric structure of the part slice, the bounding box (BB) method is used to obtain the rectangle corresponding to the minimum bounding box corresponding to the slice, that is, the two-dimensional minimum rectangle corresponding to the layer slice, and the size of the minimum rectangle is determined as the corresponding slice size. The scanning path set is screened according to the slice size to obtain a scanning path that meets the requirements. For example, the scanning path set includes horizontal reciprocating scanning and vertical reciprocating scanning. When the length is greater than or equal to the width, the horizontal reciprocating scanning path is used, and when the length is less than the width, the vertical reciprocating scanning path is used. By determining the appropriate scanning path, the efficiency of additive manufacturing can be effectively improved.

[0069] Optionally, obtaining a scanning vector rule corresponding to the slice according to the grain morphology corresponding to each position in the slice information includes:

[0070] Generate a corresponding scanning vector length according to the grain morphology corresponding to each position in the slice information;

[0071] The scan vector rule corresponding to the slice is generated according to all the scan vector lengths and the corresponding positions.

[0072] Optionally, generating a corresponding scanning vector length according to the grain morphology corresponding to each position in the slice information includes:

[0073] When the grain morphology belongs to a preset threshold range, determining the corresponding scanning vector length according to the grain morphology and a preset corresponding relationship;

[0074] When the grain morphology does not belong to the threshold range, the scanning vector length is determined according to a preset limit scanning vector length.

[0075] Optionally, the limit scan vector length includes a preset maximum limit scan vector length and a minimum limit scan vector length; and determining the scan vector length according to the preset limit scan vector length includes:

[0076] When the grain morphology is smaller than the lower limit of the threshold range, determining the minimum limit scanning vector length as the corresponding scanning vector length;

[0077] When the grain morphology is greater than the upper limit of the threshold range, the maximum limit scanning vector length is determined as the corresponding scanning vector length.

[0078] Specifically, the grain morphology includes the geometric shape and size of the grains, that is, the grain geometry and the grain size. The size corresponding to the grain morphology is compared with a preset threshold range. When the size of the grain morphology belongs to the threshold range, it also includes the maximum value of the upper limit and the minimum value of the lower limit at both ends of the threshold range. The corresponding scanning vector length is determined according to the grain size of the grain morphology and the preset corresponding relationship, wherein the preset corresponding relationship includes the corresponding relationship between the grain size of the grain morphology and the scanning vector length. It should be noted that when presetting the corresponding relationship, the particle size of the material powder used for laser additive manufacturing also needs to be considered. When the grain size corresponding to the grain morphology is less than the lower limit of the threshold range, the preset minimum limit scanning vector length is determined as the corresponding scanning vector length. Similarly, when the grain size corresponding to the grain morphology is greater than the upper limit of the threshold range, the preset maximum limit scanning vector length is determined as the corresponding scanning vector length. Finally, the scanning vector rule corresponding to the slice is generated according to each position in the slice and the scanning vector length corresponding to the position.

[0079] The preset corresponding relationship is shown in Table 1:

[0080] Table 1

[0081] Scan vector length (μm) Grain size (μm) 80 16.2 100 22.5 120 20.6 140 25.3 160 30.2 180 31.4 200 34.8 220 32.5 240 33.6 260 35.7 280 38.9 300 42.0 320 46.1 340 50.5 360 53.8 380 55.2 400 53.3

[0082] For example, when the shortest vector length corresponding to the lower limit of the threshold range is 80μm, the determination of the vector length combines three factors: 1. The diameter of the laser spot is 60μm, 2. The spot interval is 80μm; 3. The powder particle size of the material for additive manufacturing is 15-40μm. Since the actual heat affected zone of the laser scanning is larger than the spot diameter of 60μm, 80μm is set as the shortest vector, that is, the minimum limit scanning vector, because even if a shorter scanning vector is set, due to the large laser heat affected zone, the molten pool formed by 80μm will not be much different, so when the grain size is less than the lower limit of the threshold range, the minimum limit scanning vector is determined as the corresponding scanning vector. In addition, due to the influence of the powder particle size of the material, too short vectors, such as 20μm, 40μm, and 60μm scanning vectors, may also only melt 1-2 powder balls by the laser, and the molten pool morphology will not have obvious recognition. Therefore, the minimum limit scanning vector in the matching rule is determined based on the spot diameter, powder particle size, and spot interval. The shortest vector length may change due to the difference in the spot diameter and the equipment used. For example, when the laser spot and the powder particle diameter are smaller, the shortest vector can be even smaller. Similarly, when the grain size is greater than the upper limit of the threshold range, the corresponding maximum limit scanning vector is set according to the spot diameter, powder particle size and spot interval, and the maximum scanning vector is determined as the corresponding scanning vector, thereby limiting the scanning vector of the laser through the maximum limit scanning vector to avoid affecting the accuracy and quality of the printed parts due to the excessive scanning vector.

[0083] Optionally, slicing the acquired three-dimensional model of the part to obtain slicing information of multi-layer slices of the three-dimensional model of the part includes:

[0084] Setting a corresponding slice thickness according to the three-dimensional model of the part;

[0085] The three-dimensional model of the part is sliced ​​according to the slice thickness to obtain corresponding multiple layers of the slices, and the slice information corresponding to each layer of the slices is determined.

[0086] Specifically, according to the structure and strength characteristics of each part, a reasonable slice thickness is set, so that the three-dimensional model of the part can be sliced ​​through the slicing software, thereby corresponding multi-layer slicing, and the slicing information corresponding to each layer of slicing is obtained according to the data information such as the structure and strength corresponding to the three-dimensional part. Through the data information of each layer of slicing, the printing accuracy and quality of the parts can be effectively guaranteed, thereby effectively improving the overall strength of the additively manufactured parts.

[0087] Furthermore, after the part is printed, the upper surface of the part is metallographically polished and metallographically etched, and the molten pools formed by different length vectors can be observed, such as Figure 3 The above is the result of microstructure regulation by laser scanning vector, and the electron backscattered diffraction (EBSD) imaging diagram shows the grain size evolution process after different length vector scanning, wherein the left side is the grain size area 5 corresponding to the scanning vector of 80μm, and the right side is the grain size area 6 corresponding to the scanning vector of 400μm. It can be clearly seen from the figure that there is a significant difference in the grain size between the two places, indicating that when using different scanning vector lengths to control the laser for additive manufacturing, the grain structure of the printed parts changes according to the change of the scanning vector length, and is not static, while the microstructure printed by conventional parameters will not change significantly, and since the scanning vector is controllable, the grain structure formed by scanning with a variable scanning vector length is controllable.

[0088] It should be noted that the use of a gradually longer scanning vector here can more directly demonstrate the regulation of the microstructure by multi-vector length laser scanning and the evolution of the microstructure under different vector lengths. In the actual part generation process, the scanning vector length can also be adjusted according to the service requirements of the parts, and different microstructures can be generated by setting different vector lengths at different positions of the parts. The above microstructure is obtained directly after printing, and the printing process is non-stop and is completed only by changing the length of the vector. The printing equipment can be a general commercial equipment, which is more convenient than the common additive and subtractive hybrid manufacturing technology, as well as heat treatment technology. Figure 4The figure shows the average grain size statistics and microhardness test results under different scanning vector lengths. It can be seen that when the scanning vector length is from 80μm to 400μm, the grain size increases from 15μm to about 55μm, and the microhardness increases from 350HV 0.2 Down to 298HV 0.2 , and its grain size and material performance regulation effect are significant.

[0089] Optionally, performing layer-by-layer laser scanning according to the scanning paths and scanning vector rules corresponding to all the slices includes:

[0090] Determine the corresponding laser power and scanning speed according to the length of each scanning vector in the scanning vector rule;

[0091] Based on the scanning path, laser scanning is performed according to the laser power and the scanning speed corresponding to the total scanning vector length.

[0092] Exemplarily, according to the scanning vector length of each position in the scanning vector rule of each layer of slice, the laser power and scanning speed corresponding to different positions of each layer of slice are set, that is, the laser power and scanning speed suitable for each scanning vector length are determined, and according to the laser power and scanning speed corresponding to each position, laser scanning is performed on each position according to the scanning path, thereby completing the laser scanning of the corresponding layer of slices. The above method is used to perform laser scanning layer by layer according to the order of each layer of slices.

[0093] like Figure 5 As shown, a laser additive manufacturing scanning device provided by an embodiment of the present invention is characterized by comprising:

[0094] An acquisition module, used for slicing the acquired three-dimensional model of the part to obtain slicing information of multi-layer slices of the three-dimensional model of the part;

[0095] A path selection module, configured to determine a scanning path corresponding to the slice according to the slice information based on a preset scanning path set;

[0096] A scanning vector selection module, used for obtaining a scanning vector rule corresponding to the slice according to the grain morphology corresponding to each position in the slice information;

[0097] A control module is used to perform layer-by-layer laser scanning according to the scanning paths and scanning vector rules corresponding to all the slices.

[0098] like Figure 6 As shown, an electronic device provided by an embodiment of the present invention includes a memory and a processor; the memory is used to store a computer program; the processor is used to implement the laser additive manufacturing scanning method as described above when executing the computer program.

[0099] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the laser additive manufacturing scanning method as described above is implemented.

[0100] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc. In the present application, the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment of the present invention. In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0101] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A laser additive manufacturing scanning method, characterized in that: include: Slicing the acquired three-dimensional model of the part to obtain slice information of multi-layer slices of the three-dimensional model of the part; Based on a preset scanning path set, determining a scanning path corresponding to the slice according to the slice information; Obtaining a scanning vector rule corresponding to the slice according to the grain morphology corresponding to each position in the slice information; Laser scanning is performed layer by layer according to the scanning paths and scanning vector rules corresponding to all the slices.

2. The laser additive manufacturing scanning method according to claim 1, characterized in that: The step of determining a scanning path corresponding to the slice according to the slice information includes: Determine the size of the slice according to the slice information; The scanning path set is screened according to the slice size to obtain the scanning path.

3. The laser additive manufacturing scanning method according to claim 1, characterized in that: The step of obtaining a scanning vector rule corresponding to the slice according to the grain morphology corresponding to each position in the slice information includes: Generate a corresponding scanning vector length according to the grain morphology corresponding to each position in the slice information; The scan vector rule corresponding to the slice is generated according to all the scan vector lengths and the corresponding positions.

4. The laser additive manufacturing scanning method according to claim 3, characterized in that: The step of generating a corresponding scanning vector length according to the grain morphology corresponding to each position in the slice information includes: When the grain morphology belongs to a preset threshold range, determining the corresponding scanning vector length according to the grain morphology and a preset corresponding relationship; When the grain morphology does not belong to the threshold range, the scanning vector length is determined according to a preset limit scanning vector length.

5. The laser additive manufacturing scanning method according to claim 4, characterized in that: The limit scan vector length includes a preset maximum limit scan vector length and a minimum limit scan vector length; and determining the scan vector length according to the preset limit scan vector length includes: When the grain morphology is smaller than the lower limit of the threshold range, determining the minimum limit scanning vector length as the corresponding scanning vector length; When the grain morphology is greater than the upper limit of the threshold range, the maximum limit scanning vector length is determined as the corresponding scanning vector length.

6. The laser additive manufacturing scanning method according to claim 1, characterized in that: The step of slicing the acquired three-dimensional model of the part to obtain slicing information of multi-layer slices of the three-dimensional model of the part includes: Setting a corresponding slice thickness according to the three-dimensional model of the part; The three-dimensional model of the part is sliced ​​according to the slice thickness to obtain corresponding multiple layers of the slices, and the slice information corresponding to each layer of the slices is determined.

7. The laser additive manufacturing scanning method according to claim 1, characterized in that: The performing layer-by-layer laser scanning according to the scanning paths and the scanning vector rules corresponding to all the slices includes: Determine the corresponding laser power and scanning speed according to the length of each scanning vector in the scanning vector rule; Based on the scanning path, laser scanning is performed according to the laser power and the scanning speed corresponding to the total scanning vector length.

8. A laser additive manufacturing scanning device, characterized in that: include: An acquisition module, used for slicing the acquired three-dimensional model of the part to obtain slicing information of multi-layer slices of the three-dimensional model of the part; A path selection module, configured to determine a scanning path corresponding to the slice according to the slice information based on a preset scanning path set; A scanning vector selection module, used for obtaining a scanning vector rule corresponding to the slice according to the grain morphology corresponding to each position in the slice information; A control module is used to perform layer-by-layer laser scanning according to the scanning paths and scanning vector rules corresponding to all the slices.

9. An electronic device, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is used to implement the laser additive manufacturing scanning method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the laser additive manufacturing scanning method according to any one of claims 1 to 7 is implemented.

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