Multi-mode laser collaborative wide-area printing method based on splicing area interface regulation and control

Abstract

The invention discloses a multi-mode laser collaborative wide-area printing method based on splicing area interface regulation and control, and relates to the field of additive manufacturing. The multi-mode laser collaborative wide-area printing method comprises the steps that a three-dimensional model of a to-be-printed part is constructed; performing hierarchical slicing on the three-dimensional model to obtain a plurality of slice layers; performing region division on each slice layer to obtain each partition of each slice layer; wherein each slice layer comprises a plurality of subareas, and a splicing area with a preset width is reserved between any two adjacent subareas in each slice layer; formulating each slice layer and a partition printing strategy in the slice layer; and the multi-mode laser additive manufacturing system is used for conducting layer-by-layer printing according to the slice layers and the partition printing strategy in each slice layer. In the printing of each slice layer, the flat-topped light beam is firstly used for carrying out large-breadth wide-area printing, and then the Gaussian light beam is used for carrying out depth-controllable high-speed laser remelting finishing processing on the splicing area, so that defects can be inhibited, crystal grains can be refined, and the printing quality is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of additive manufacturing technology, and in particular to a multi-mode laser collaborative wide-area printing method based on splicing area interface regulation. Background Art

[0002] In the field of additive manufacturing, the flat-top beam has a large coverage area and high power, and can perform large-area printing. In addition, the uniform energy distribution of the flat-top beam solves the problems of the center intensity and excess heat of the Gaussian beam, making the temperature distribution of the molten pool flatter and wider, thereby reducing the molten pool spatter, the formation of keyholes, and the resulting metallurgical defects such as porosity, spheroidization and erosion zones.

[0003] However, when multiple flat-top beams are used for additive manufacturing at the same time, the increase in the number of beams will inevitably result in numerous interfaces in the splicing area, coarse microstructure in the splicing area under multiple thermal cycles, and inconsistent mechanical properties between the splicing area and the melting area, affecting the overall forming quality. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the present invention proposes a multi-mode laser collaborative wide-area printing method based on splicing area interface regulation.

[0005] The present invention proposes a multi-mode laser collaborative wide-area printing method based on splicing area interface regulation, which is applied to a multi-mode laser additive manufacturing system. The multi-mode laser additive manufacturing system includes two multi-mode laser modules, and the multi-mode laser modules are used to output a flat-top beam or a Gaussian beam; the method includes:

[0006] Build a 3D model of the part to be printed;

[0007] The three-dimensional model is sliced ​​in layers to obtain multiple slice layers;

[0008] Performing regional division on each slice layer to obtain each partition of each slice layer; wherein each slice layer includes multiple partitions, and a splicing area of ​​a predetermined width is reserved between any two adjacent partitions in each slice layer;

[0009] Develop printing strategies for each slice layer and the partitions within the slice layer;

[0010] A multi-mode laser additive manufacturing system is used to perform layer-by-layer printing according to each slice layer and the partition printing strategy within each slice layer.

[0011] Preferably, each slice layer is divided into regions to obtain each partition of each slice layer, specifically including:

[0012] According to the structural and functional characteristics of the parts, determine the area where the parts bear the least load or have the lowest probability of fatigue failure;

[0013] According to the area where the component bears the minimum load or has the lowest probability of fatigue failure, regional division is performed on each slice layer respectively to obtain each partition of each slice layer.

[0014] Preferably, the shape of the partition is a rhombus, a square, a rectangle or a trapezoid.

[0015] Preferably, in S4, the printing strategy for each slice layer and each partition within each slice layer specifically includes:

[0016] When multiple partitions are arranged in a single row and multiple columns, in the row direction, the multiple partitions are sequentially divided into several printing groups. Except for the last printing group in the predetermined direction of the row, each printing group includes two adjacent partitions and the inter-column splicing regions adjacent to the two partitions respectively, and the last printing group includes two adjacent partitions and the inter-column splicing region located between the two partitions or a single partition;

[0017] Use the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on each printing group in sequence;

[0018] After printing is completed, use the multi-mode laser additive manufacturing system to output a Gaussian laser to perform laser remelting on the inter-column splicing regions within each printing group.

[0019] Preferably, using the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on the printing groups in sequence specifically includes:

[0020] For the printing groups except the last printing group in the predetermined direction of the row, use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing region;

[0021] Use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on the other partition in the corresponding printing group and the adjacent inter-column splicing region;

[0022] For the last printing group, use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing region;

[0023] Use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on the other partition in the corresponding printing group;

[0024] Alternatively, use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam for laser printing on the only partition in the corresponding printing group.

[0025] Preferably, use the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on the printing groups in sequence, and it further includes:

[0026] When multiple partitions are arranged in multiple rows and columns, each printing group in non-the last row further includes an inter-row splicing area between this partition and the adjacent partition in the next row;

[0027] When printing a certain row, use the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on each first printing group in sequence; use the multi-mode laser additive manufacturing system to output a Gaussian laser to perform laser remelting on the inter-column splicing areas within each printing group;

[0028] After completing the laser printing of all rows in sequence, use the multi-mode laser additive manufacturing system to output a Gaussian laser to perform laser remelting on the inter-row splicing areas between the rows.

[0029] Preferably, when printing a certain row, use the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on each first printing group in sequence, specifically including:

[0030] When this printing group is in non-the last row and is a printing group other than the last one, use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group, as well as the adjacent inter-column splicing area and inter-row splicing area;

[0031] Use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on the other partition in the corresponding printing group, as well as the adjacent inter-column splicing area and inter-row splicing area;

[0032] When this printing group is in non-the last row and is the last printing group, use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group, as well as the adjacent inter-column splicing area and inter-row splicing area;

[0033] Use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on the other partition in the corresponding printing group and the inter-row splicing area;

[0034] Alternatively, use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on the only partition in the corresponding printing group and the inter-row splicing area;

[0035] When the printing group is located at the last line and is a printing group other than the last one, use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing area;

[0036] Use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on another partition in the corresponding printing group and the adjacent inter-column splicing area.

[0037] When the printing group is located at the last line and is the last printing group, use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing area;

[0038] Use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on another partition in the corresponding printing group;

[0039] Alternatively, use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on the only partition in the corresponding printing group.

[0040] Preferably, the printing directions of the printing groups of the odd slice layers and the even slice layers are opposite in the row direction.

[0041] Preferably, the process parameters for laser printing with a flat-top beam include: laser power of 2000 - 3000W, scanning speed of 200 - 20000mm / s, overlapping rate of 30% - 50%, and inter-layer rotation angle of 40 - 70°.

[0042] Preferably, the process parameters for laser remelting with a Gaussian beam include: laser power of 500 - 1000W, scanning speed of 100 - 10000mm / s, overlapping rate of 30 - 50%, and the scanning direction is perpendicular to the scanning direction of the flat-top light in the splicing area.

[0043] In the present invention, the proposed multi-mode laser collaborative wide-area printing method based on splicing area interface regulation uses the multi-mode laser additive manufacturing system to perform layer-by-layer printing according to each slice layer and the partition printing strategy within each slice layer. In the printing of each slice layer, first use a flat-top beam to perform large-area wide-area printing, and then use a Gaussian beam to perform high-speed laser remelting and finishing processing with controllable depth on the splicing area, which can suppress defects and refine grains, and effectively improve the printing quality. Description of the Drawings

[0044] Figure 1Schematic flow diagram of a multi-mode laser collaborative wide-area printing method based on splicing area interface regulation in an embodiment proposed by the present invention. Detailed implementation manners

[0045] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0046] Refer to Figure 1 , a multi-mode laser collaborative wide-area printing method based on splicing area interface regulation proposed by the present invention is applied to a multi-mode laser additive manufacturing system. The multi-mode laser additive manufacturing system includes two multi-mode laser modules, and the multi-mode laser modules are used to output flat-top beams or Gaussian beams;

[0047] The method includes:

[0048] Construct a three-dimensional model of the part to be printed;

[0049] Perform layer-by-layer slicing on the three-dimensional model to obtain a plurality of sliced layers;

[0050] Perform area division on each sliced layer to obtain each partition of each sliced layer; wherein, each sliced layer includes a plurality of partitions, and a splicing area with a predetermined width is left between any two adjacent partitions in each sliced layer;

[0051] Formulate printing strategies for each sliced layer and the partitions within the sliced layer;

[0052] Use the multi-mode laser additive manufacturing system to perform layer-by-layer printing according to each sliced layer and the printing strategies of the partitions within each sliced layer.

[0053] The present invention uses the multi-mode laser additive manufacturing system to perform layer-by-layer printing according to each sliced layer and the printing strategies of the partitions within each sliced layer. In the printing of each sliced layer, first use a flat-top beam for large-area wide-area printing, and then use a Gaussian beam for high-speed laser remelting and finishing processing with controllable depth on the splicing area, which can suppress defects and refine grains, and effectively improve the printing quality.

[0054] "A plurality of" in this embodiment includes two and more than two.

[0055] It should be understood that only one partition strategy is specified for a part. If it is divided into four regions, then each sliced layer is four regions; if it is divided into two regions, then each sliced layer is two regions.

[0056] In this embodiment, performing area division on each sliced layer respectively to obtain each partition of each sliced layer specifically includes:

[0057] According to the structural and functional characteristics of the part, determine the area where the part bears the minimum load or has the lowest probability of fatigue failure;

[0058] According to the area where the part bears the minimum load or has the lowest probability of fatigue failure, conduct regional division for each slice layer respectively to obtain each partition of each slice layer.

[0059] During specific implementation, simulate the structural and functional characteristics of the part to determine the area where the part bears the minimum load or has the lowest probability of fatigue failure, so as to ensure the rationality of regional division.

[0060] In this embodiment, the shape of the partition is a rhombus, a square, a rectangle or a trapezoid.

[0061] In this embodiment, in S4, the printing strategy for each slice layer and each partition within each slice layer specifically includes:

[0062] When multiple partitions are arranged in a single row and multiple columns, in the row direction, divide the multiple partitions into several printing groups in sequence. Except for the last printing group in the predetermined direction of the row, each printing group includes two adjacent partitions and the inter-column splicing regions adjacent to the two partitions respectively, and the last printing group includes two adjacent partitions and the inter-column splicing region between the two partitions or a single partition;

[0063] Use the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on each printing group in sequence;

[0064] After printing is completed, use the multi-mode laser additive manufacturing system to output a Gaussian laser to perform laser remelting on the inter-column splicing regions within each printing group.

[0065] With such a setting in this embodiment, it can effectively avoid the interference between two flat-top beams when processing the splicing region simultaneously. Using Gaussian light to perform depth-controllable laser remelting treatment on the splicing region manufactured by the flat-top light can suppress defects and refine grains, improve the printing quality of each slice layer, and thus improve the overall printing quality.

[0066] In a further embodiment, using the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on the printing groups in sequence specifically includes:

[0067] For the printing groups except the last printing group in the predetermined direction of the row, use one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing region;

[0068] Use one of the multimode laser modules in the multimode laser additive manufacturing system to output a flat-top beam for laser printing on another partition in the corresponding printing group and the adjacent inter-column splicing area;

[0069] For the last printing group, use one of the multimode laser modules in the multimode laser additive manufacturing system to output a flat-top beam for laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing area;

[0070] Use one of the multimode laser modules in the multimode laser additive manufacturing system to output a flat-top beam for laser printing on another partition in the corresponding printing group;

[0071] Alternatively, use one of the multimode laser modules in the multimode laser additive manufacturing system to output a flat-top beam for laser printing on the only partition in the corresponding printing group.

[0072] In a further embodiment, when multiple partitions are arranged in multiple rows and columns, each printing group in the non-last row further includes an inter-row splicing area between this partition and the adjacent partition in the next row;

[0073] When printing a certain row, use the multimode laser additive manufacturing system to output a flat-top beam to sequentially perform laser printing on each first printing group; use the multimode laser additive manufacturing system to output Gaussian laser to perform laser remelting on the inter-column splicing areas within each printing group;

[0074] After sequentially completing the laser printing of all rows, use the multimode laser additive manufacturing system to output Gaussian laser to perform laser remelting on the inter-row splicing areas between the rows.

[0075] In a further embodiment, when printing a certain row, using the multimode laser additive manufacturing system to output a flat-top beam to sequentially perform laser printing on each first printing group specifically includes:

[0076] When the printing group is in the non-last row and is a printing group other than the last printing group, use one of the multimode laser modules in the multimode laser additive manufacturing system to output a flat-top beam for laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing area and inter-row splicing area;

[0077] Use one of the multimode laser modules in the multimode laser additive manufacturing system to output a flat-top beam for laser printing on another partition in the corresponding printing group and the adjacent inter-column splicing area and inter-row splicing area;

[0078] When the printing group is located in a non - last row and is the last printing group, use one of the multi - mode laser modules in the multi - mode laser additive manufacturing system to output a flat - top beam to perform laser printing on one of the partitions in the corresponding printing group, as well as the adjacent inter - column splicing area and inter - row splicing area;

[0079] Use one of the multi - mode laser modules in the multi - mode laser additive manufacturing system to output a flat - top beam to perform laser printing on another partition in the corresponding printing group and the inter - row splicing area;

[0080] Alternatively, use one of the multi - mode laser modules in the multi - mode laser additive manufacturing system to output a flat - top beam to perform laser printing on the only partition in the corresponding printing group and the inter - row splicing area.

[0081] Of course, when the printing group is located in the last row and is a printing group other than the last one, use one of the multi - mode laser modules in the multi - mode laser additive manufacturing system to output a flat - top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter - column splicing area;

[0082] Use one of the multi - mode laser modules in the multi - mode laser additive manufacturing system to output a flat - top beam to perform laser printing on another partition in the corresponding printing group and the adjacent inter - column splicing area.

[0083] When the printing group is located in the last row and is the last printing group, use one of the multi - mode laser modules in the multi - mode laser additive manufacturing system to output a flat - top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter - column splicing area;

[0084] Use one of the multi - mode laser modules in the multi - mode laser additive manufacturing system to output a flat - top beam to perform laser printing on another partition in the corresponding printing group;

[0085] Alternatively, use one of the multi - mode laser modules in the multi - mode laser additive manufacturing system to output a flat - top beam to perform laser printing on the only partition in the corresponding printing group.

[0086] In a further embodiment, the printing directions of the printing groups of the odd - numbered sliced layers and the even - numbered sliced layers are opposite in the row direction.

[0087] With such a setting, through the interleaving of the printing directions of the printing groups of the odd - numbered sliced layers and the even - numbered sliced layers in the row direction, it is possible to reduce the surface roughness of the splicing area through inter - layer mutual coverage, effectively improving the dimensional accuracy.

[0088] In one specific embodiment, a certain slice layer includes two adjacent rectangular partitions in sequence, namely a first partition and a second partition, with a first inter-column splicing area left between the first partition and the second partition; the two multimode laser modules are a first multimode laser module and a second multimode laser module respectively;

[0089] When printing this layer, the coverage range of the flat-top beam of the first multimode laser module is the first partition and the first inter-column splicing area, and the coverage unit of the flat-top beam of the second multimode laser module is the second partition;

[0090] Use the first multimode laser module and the second multimode laser module to simultaneously perform laser printing on the corresponding coverage ranges;

[0091] After printing is completed, use the second multimode laser module to output laser to perform laser remelting on the splicing area;

[0092] When printing the next layer of this layer, the coverage range of the flat-top beam of the second multimode laser module is the second partition and the first inter-column splicing area, and the coverage unit of the flat-top beam of the first multimode laser module is the first partition;

[0093] Use the first multimode laser module and the second multimode laser module to simultaneously perform laser printing on the corresponding coverage ranges;

[0094] After printing is completed, use the first multimode laser module to output laser to perform laser remelting on the first inter-column splicing area.

[0095] In another specific embodiment, a certain slice layer includes three adjacent rectangular partitions in sequence, namely a first partition, a second partition and a third partition; the splicing area between the first partition and the second partition is the first inter-column splicing area, and the splicing area between the second partition and the third partition is the second inter-column splicing area;

[0096] The two multimode laser modules are a first multimode laser module and a second multimode laser module respectively;

[0097] When printing this layer, take the first partition, the first inter-column splicing area, the second partition and the second inter-column splicing area as a printing group, and print the third partition separately;

[0098] The coverage range of the flat-top beam of the first multimode laser module is the first partition and the first inter-column splicing area, and the coverage unit of the flat-top beam of the second multimode laser module is the second partition and the second inter-column splicing area;

[0099] Use the first multimode laser module and the second multimode laser module to output flat-top beams to simultaneously perform laser printing on the corresponding coverage ranges;

[0100] Then, the first multimode laser module or the second multimode laser module performs laser printing on the third partition;

[0101] The Gaussian laser beam output by the first multimode laser module is used to perform laser remelting on the first inter-column splicing area, and the Gaussian laser beam output by the second multimode laser module is used to perform laser remelting on the second inter-column splicing area;

[0102] When printing the next layer of this layer, the third partition, the second inter-column splicing area, the second partition, and the first inter-column splicing area are used as a printing group, and the first partition is printed separately;

[0103] The coverage range of the flat-top beam of the second multimode laser module is the third partition and the second inter-column splicing area, and the coverage range of the flat-top beam of the first multimode laser module is the second partition and the first inter-column splicing area;

[0104] The first multimode laser module and the second multimode laser module are used to perform laser printing on the corresponding coverage ranges simultaneously;

[0105] Then, the second multimode laser module or the first multimode laser module performs laser printing on the third partition;

[0106] The Gaussian laser beam output by the first multimode laser module is used to perform laser remelting on the first inter-column splicing area, and the Gaussian laser beam output by the second multimode laser module is used to perform laser remelting on the second inter-column splicing area.

[0107] In this embodiment, the predetermined width is 2 - 10 mm.

[0108] In this embodiment, the process parameters for laser printing with the flat-top beam include: laser power 2000 - 3000 W, scanning speed 200 - 20000 mm / s, overlapping rate 30% - 50%, and interlayer rotation angle 40 - 70°.

[0109] In this embodiment, the process parameters for laser remelting with the Gaussian beam include: laser power 500 - 1000 W, scanning speed 100 - 10000 mm / s, overlapping rate 30 - 50%, and the scanning direction is perpendicular to the scanning direction of the flat-top light in the splicing area.

[0110] In summary, the present invention uses a Gaussian beam to perform in-situ high-speed laser remelting treatment with controllable depth on the splicing area, which can eliminate metallurgical defects in the splicing area, refine the microstructure, homogenize the structure, reduce the performance differences inside the splicing area and the melting layer, and improve the comprehensive mechanical properties.

[0111] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention should cover within the protection scope of the present invention by making equivalent substitutions or changes according to the technical solution and inventive concept of the present invention.

Claims

1. A multi-mode laser collaborative wide-area printing method based on splicing area interface regulation, applied to a multi-mode laser additive manufacturing system, the multi-mode laser additive manufacturing system includes two multi-mode laser modules, the multi-mode laser modules are used to output a flat-top beam or a Gaussian beam; characterized in that, The method comprises: Build a 3D model of the part to be printed; The three-dimensional model is sliced ​​in layers to obtain multiple slice layers; Performing regional division on each slice layer to obtain each partition of each slice layer; wherein each slice layer includes multiple partitions, and a splicing area of ​​a predetermined width is reserved between any two adjacent partitions in each slice layer; Develop printing strategies for each slice layer and the partitions within the slice layer; A multi-mode laser additive manufacturing system is used to perform layer-by-layer printing according to each slice layer and the partition printing strategy within each slice layer.

2. The multi-mode laser collaborative wide-area printing method based on splicing area interface regulation according to claim 1 is characterized in that: Each slice layer is divided into regions to obtain each partition of each slice layer, including: According to the structural and functional characteristics of the parts, determine the area where the parts bear the least load or have the lowest probability of fatigue failure; According to the area where the part bears the least load or has the lowest probability of fatigue failure, each slice layer is divided into regions to obtain each partition of each slice layer.

3. The multi-mode laser collaborative wide-area printing method based on splicing area interface regulation according to claim 2 is characterized in that: The shape of the partitions is diamond, square, rectangle or trapezoid.

4. The multi-mode laser collaborative wide-area printing method based on splicing area interface regulation according to claim 1 is characterized in that: In S4, each slice layer and the partition printing strategy within each slice layer specifically include: When multiple partitions are arranged in a single row and multiple columns, in the row direction, the multiple partitions are sequentially divided into a plurality of printing groups, and the printing groups except the last printing group in the predetermined direction of the row all include two adjacent partitions and the inter-column splicing areas adjacent to the two partitions respectively, and the last printing group includes two adjacent partitions and the inter-column splicing area or a separate partition located between the two partitions; The multi-mode laser additive manufacturing system is used to output a flat-top beam to laser print each printing group in turn; When printing is completed, the multi-mode laser additive manufacturing system is used to output Gaussian laser to laser remelt the inter-column splicing areas within each printing group.

5. The multi-mode laser collaborative wide-area printing method based on splicing area interface regulation according to claim 4 is characterized in that: The multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on the printing groups in sequence, specifically including: For printing groups other than the last printing group in a predetermined direction of the row, laser printing is performed on one of the partitions in the corresponding printing group and the adjacent inter-column splicing area by outputting a flat-top beam from one of the multi-mode laser modules in the multi-mode laser additive manufacturing system; Using one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on another partition in the corresponding printing group and an adjacent inter-column splicing area; For the last printing group, one of the multi-mode laser modules in the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing area; Using one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on another partition in the corresponding printing group; Alternatively, one of the multi-mode laser modules in the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on the only partition in the corresponding printing group.

6. The multi-mode laser collaborative wide-area printing method based on splicing area interface regulation according to claim 4 is characterized in that: The multi-mode laser additive manufacturing system is used to output a flat-top beam to sequentially laser print the printing groups, and further includes: When multiple partitions are arranged in multiple rows and columns, each printing group other than the last row also includes an inter-row splicing area between the partition and the adjacent next row of partitions; When printing a certain row, the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on each first printing group in turn; the multi-mode laser additive manufacturing system is used to output a Gaussian laser to perform laser remelting on the inter-column splicing area in each printing group; The laser printing of all rows is completed in sequence, and then the Gaussian laser output by the multi-mode laser additive manufacturing system is used to laser remelt the inter-row splicing areas between the rows.

7. The multi-mode laser collaborative wide-area printing method based on splicing area interface regulation according to claim 6 is characterized in that: When printing a certain row, the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on each first printing group in sequence, specifically including: When the printing group is located in a non-last row and is a printing group other than the last printing group, one of the multi-mode laser modules in the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing area and inter-row splicing area; Using one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on another partition in the corresponding printing group and adjacent inter-column splicing areas and inter-row splicing areas; When the printing group is located in a non-last row and is the last printing group, one of the multi-mode laser modules in the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing area and inter-row splicing area; Using one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on another partition and an inter-row splicing area in the corresponding printing group; Alternatively, one of the multi-mode laser modules in the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on the unique partition and the inter-row splicing area in the corresponding printing group; When the printing group is located in the last row and is a printing group other than the last printing group, one of the multi-mode laser modules in the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing area; One of the multi-mode laser modules in the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on another partition in the corresponding printing group and an adjacent inter-column splicing area. When the printing group is located in the last row and is the last printing group, one of the multi-mode laser modules in the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on one of the partitions in the corresponding printing group and the adjacent inter-column splicing area; Using one of the multi-mode laser modules in the multi-mode laser additive manufacturing system to output a flat-top beam to perform laser printing on another partition in the corresponding printing group; Alternatively, one of the multi-mode laser modules in the multi-mode laser additive manufacturing system is used to output a flat-top beam to perform laser printing on the only partition in the corresponding printing group.

8. The multi-mode laser collaborative wide-area printing method based on splicing area interface regulation according to claim 4 is characterized in that: The printing directions of the printing groups of the odd-numbered slice layers and the printing groups of the even-numbered slice layers in the row direction are opposite.

9. The multi-mode laser collaborative wide-area printing method based on splicing area interface regulation according to claim 4, characterized in that: The process parameters for flat-top beam laser printing include: laser power 2000-3000W, scanning speed 200-20000mm / s, overlap rate 30%-50%, and inter-layer rotation angle 40-70°.

10. The multi-mode laser collaborative wide-area printing method based on splicing area interface regulation according to claim 4, characterized in that: The process parameters of laser remelting with Gaussian beam include: laser power 500-1000W, scanning speed 100-10000mm / s, overlap rate 30-50%, and scanning direction perpendicular to the scanning direction of the flat top light in the splicing area.

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