Laser forging printing control method and device

Abstract

The invention provides a laser forging printing control method and device. The method comprises the steps of obtaining a plurality of slice layers of a target three-dimensional model in response to a received printing instruction; after the current sheet layer is traversed, controlling powder spreading equipment to spread powder on the current sheet layer according to the powder spreading layer thicknesses and geometric positions of different subareas to obtain a to-be-printed sheet layer; the standard cladding power is adjusted based on the powder laying layer thicknesses of the different subareas and the configured power algorithms corresponding to the different subareas, and the working power corresponding to the different subareas is obtained; controlling the melting laser to scan each subarea according to the adjusted working power, and monitoring the molten pool thermal state of the corresponding subarea in real time by an infrared thermal imager; when the molten pool thermal state of the corresponding subarea meets the preset thermal state, ultrafast laser is controlled to conduct forging printing on the corresponding subarea according to the standard forging parameters; and then forging printing of other sheet layers is completed step by step. The method improves the quality of the printed part and the printing efficiency.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and more specifically, to a laser forging printing control method and apparatus. Background Technology

[0002] 3D printing technology is an emerging molding method. Its core is to transform the complex 3D shape of the workpiece to be formed into a combination of simple 2D cross sections through slicing. Therefore, it is not necessary to use traditional machining tools and molds. Based on the three-dimensional computer-aided design model of the workpiece, material is deposited layer by layer along the height direction on a computer-controlled rapid prototyping machine to form a series of 2D cross-sectional thin sheets of the workpiece. The sheets are then bonded together to form a three-dimensional workpiece.

[0003] Existing additive manufacturing technologies generally use fixed powder layer thickness and laser power. When the layer thickness is increased, incomplete melting may occur. If the laser power is increased, problems such as increased porosity and increased thermal stress may occur, leading to cracking. Summary of the Invention

[0004] The purpose of this application is to provide a laser forging printing control method and apparatus, which can effectively improve the quality of printed parts, reduce porosity and thermal stress accumulation under the action of enhanced laser, and improve printing efficiency by appropriately increasing the layer thickness as needed.

[0005] Firstly, a laser forging printing control method is provided, which is applied to a control system. This method may include: In response to the received print command, the target 3D model is sliced ​​to obtain multiple layers; After identifying the geometric features of each layer to obtain the partition information of each layer, a partition data mapping table is constructed based on the partition information of each layer and the configured process recommendation information. The partition data mapping table includes the geometric position of different partitions in each layer, the powder layer thickness, the standard forging parameters and the standard cladding power. After traversing the current layer according to the preset traversal order, the powder spreading device is controlled to spread powder on the current layer according to the powder layer thickness and geometric position of the different partitions to obtain the layer to be printed. Based on the powder coating thickness of different zones and the power algorithm corresponding to different zones, the standard cladding power is adjusted to obtain the working power corresponding to different zones; The melting laser is controlled to perform partitioned melting scans of each zone in the wafer to be printed according to the adjusted working power. The melting completion signal triggers an infrared thermal imager to monitor the thermal state of the molten pool in the corresponding zone after the melting laser scan in real time and feeds it back to the control system. When the molten pool thermal state of the corresponding zone meets the preset thermal state, the ultrafast laser is controlled to forge and print the corresponding zone according to the standard forging parameters; After each partition in the layer to be printed is completed, the next layer among the traversed layers is taken as the new current layer, and the process returns to the following steps: control the powder spreading device to spread powder on the current layer according to the powder layer thickness and partition information of the different partitions, until all layers are traversed to complete the forging printing of all layers.

[0006] In one possible implementation, after obtaining the sheet layer to be printed, the method further includes: The laser 3D scanner is controlled to detect the powder spreading quality of each zone in the layer to be printed, and a 3D dataset of each zone after powder spreading is obtained. When the error values ​​of powder spreading flatness corresponding to the three-dimensional dataset of each partition are all found to meet the preset error conditions, it is determined that the powder spreading of the layer to be printed is complete.

[0007] In one possible implementation, the method further includes: When the error value of the powder spreading flatness corresponding to the 3D dataset of any partition is detected to be inconsistent with the preset error threshold, the powder spreading device is controlled to spread powder on the corresponding partition and the execution step is returned: control the laser 3D scanner to detect the powder spreading quality of each partition in the layer to be printed.

[0008] In one possible implementation, the partitioning information includes the geometric location of different partitions on the corresponding slice and the geometric features of different partitions; The different zones include a support structure zone, a main functional zone, and a fine feature zone; The geometric characteristics of the supporting structure area include a sag angle of no more than 45°, an ultra-thick structure within the area of ​​more than 5 mm, and a bearing principal stress of no more than 20% of the yield strength. The geometric features of the main functional area include bearing principal stress not less than 50% of the material yield strength, and / or having a thickness of 1-5 mm and a curvature radius of 2-10 mm. The geometric features of the fine feature region include a geometric thin wall of no more than 1 mm, a small hole diameter of no more than 3 mm, and a maximum radius of curvature of no more than 2 mm within the region.

[0009] In one possible implementation, the power algorithms corresponding to the different partitions include a linear growth power algorithm corresponding to the support structure region, an exponential compensation power algorithm corresponding to the fine feature region, and a power algorithm that maintains the standard cladding power corresponding to the main functional region.

[0010] In one possible implementation, the method further includes: When the thermal state of the molten pool in the corresponding zone does not meet the preset thermal state, the working power of the corresponding zone is adjusted, and the execution step is returned: control the molten laser to scan the corresponding zone according to the adjusted working power.

[0011] In one possible implementation, after controlling the ultrafast laser to forge and print the corresponding zones according to standard forging parameters, the method further includes: Control the energy density sensor to monitor the forging energy generated during forging printing of the corresponding zone and feed it back to the control system; If the monitored forging energy reaches the preset energy threshold, then the forging of the corresponding zone is completed. If the monitored forging energy does not reach the preset energy threshold, return to the execution step: control the ultrafast laser to forge and print the corresponding partition according to the standard forging parameters.

[0012] Secondly, a laser forging printing control device is provided, which is applied to a control system. The device may include: The slicing unit is used to slice the target 3D model in response to the received printing command, resulting in multiple slices; The construction unit is used to identify the geometric features of each layer, obtain the partition information of each layer, and construct a partition data mapping table based on the partition information of each layer and the configured process recommendation information. The partition data mapping table includes the geometric position of different partitions in each layer, powder layer thickness, standard forging parameters and standard cladding power. The control unit is used to control the powder spreading device to spread powder on the current layer according to the powder layer thickness and geometric position of the different partitions after traversing the current layer in a preset traversal order, so as to obtain the layer to be printed. The adjustment unit is used to adjust the standard cladding power based on the powder coating thickness of different zones and the power algorithm corresponding to the different zones, so as to obtain the working power corresponding to different zones; The control unit is also used to control the melting laser to perform partitioned melting scanning of each partition in the layer to be printed according to the adjusted working power; the melting completion signal triggers the infrared thermal imager to monitor the thermal state of the molten pool of the corresponding partition after the melting laser scan in real time and feeds it back to the control system; and when the thermal state of the molten pool of the corresponding partition meets the preset thermal state, the control unit controls the ultrafast laser to forge and print the corresponding partition according to the standard forging parameters. The determining unit is used to determine the next layer among the multiple layers traversed after the forging printing of each partition of the layer to be printed is completed, and to trigger the control unit to execute: control the powder spreading device to spread powder on the current layer according to the powder layer thickness and partition information of the different partitions, until all layers are traversed, so as to complete the forging printing of all layers.

[0013] Thirdly, an electronic device is provided, which includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; When a processor executes a program stored in memory, it implements any of the steps described in the first aspect above.

[0014] Fourthly, a computer-readable storage medium is provided, wherein a computer program is stored therein, and when executed by a processor, the computer program implements the steps of any of the methods described in the first aspect above.

[0015] The laser forging printing control method and apparatus provided in this application respond to a received printing command by slicing the target 3D model to obtain multiple layers; after identifying the geometric features of each layer to obtain the partition information of each layer, a partition data mapping table is constructed based on the partition information of each layer and the configured process recommendation information; the partition data mapping table includes the geometric position, powder layer thickness, standard forging parameters, and standard cladding power of different partitions in each layer; after traversing the current layer according to the preset traversal order, the powder spreading device is controlled to spread powder on the current layer according to the powder layer thickness and geometric position of the different partitions to obtain the layer to be printed; based on the powder layer thickness of different partitions and the power algorithm corresponding to the different partitions, the standard cladding is performed. The power is adjusted to obtain the working power corresponding to different zones. The molten laser is controlled to perform zone-by-zone molten scanning of each zone in the layer to be printed according to the adjusted working power. The molten completion signal triggers an infrared thermal imager to monitor the thermal state of the molten pool of the corresponding zone in real time after the molten laser scan and feeds it back to the control system. When the thermal state of the molten pool of the corresponding zone meets the preset thermal state, the ultrafast laser is controlled to perform forging printing on the corresponding zone according to standard forging parameters. After the forging printing of each zone in the layer to be printed is completed, the next layer among the traversed layers is taken as the new current layer, and the process returns to the execution step: the powder spreading device is controlled to spread powder on the current layer according to the powder layer thickness and zone information of the different zones, until all layers are traversed to complete the forging printing of all layers. This method solves the problem of balancing efficiency and quality in additive manufacturing, and improves the quality of the printed parts and the printing efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of a laser forging printing platform provided in an embodiment of this application; Figure 2 A schematic flowchart of a laser forging printing control method provided in an embodiment of this application; Figure 3 A schematic diagram of a laser forging printing control device provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art. The words "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are only used to distinguish different components. The words "comprising" or "including," etc., mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but do not exclude other elements or objects. The words "connected," "coupled," or "connected," etc., are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Laser powder bed fusion (LBD) technology, with its short cycle time and high precision, has become a core technology in the additive manufacturing field. The powder bed fusion laser beam used in LBD technology can precisely manufacture complex metal parts. Ultrafast laser shock peening (USP), as an advanced method of surface modification, can significantly improve material surfaces through the high-energy-density shock waves generated by an ultrafast laser beam. This technology not only induces residual compressive stress on the material surface, increasing microhardness, but also optimizes its microstructure, thereby enhancing fatigue resistance. This application employs forging printing under the action of a strengthening laser, effectively improving the quality of the printed metal parts, reducing porosity and thermal stress accumulation, and appropriately increasing layer thickness as needed, thus improving printing efficiency.

[0020] Figure 1 The laser forging printing platform provided in the embodiments of this application, such as Figure 1As shown, the laser forging printing platform may include a control system, a powder spreading device, a melting laser, a laser 3D scanner, an infrared thermal imager, and an ultrafast laser. The control system is communicatively connected to the powder spreading device, the melting laser, the infrared thermal imager, and the ultrafast laser.

[0021] After the powder spreading equipment achieves the required powder spreading quality for any layer corresponding to the target 3D model, the control system drives the cladding laser to perform regional melting at dynamic power. The melting completion signal triggers an ultrafast laser to synchronously forge the completed area. Once the forging energy reaches the required level, the system immediately switches to the next area, forming a closed-loop control system that seamlessly connects cladding and forging.

[0022] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application. Furthermore, the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0023] Figure 2 This is a schematic flowchart illustrating a laser forging printing control method provided in an embodiment of this application. Figure 2 As shown, when applied in a control system, this method may include: Step S210: In response to the received printing command, slice the target 3D model to obtain multiple layers.

[0024] After receiving the printing command, the control system slices the target 3D model on a computer-controlled rapid prototyping machine based on the configured 3D computer-aided design model to obtain multiple layers.

[0025] Furthermore, information such as the positional relationship between multiple layers and the thickness of each layer can be obtained.

[0026] Step S220: After performing geometric feature recognition on each layer to obtain the partition information of each layer, construct a partition data mapping table based on the partition information of each layer and the configured process recommendation information.

[0027] The partitioning information may include the geometric features of different partitions and their geometric positions on the corresponding sheets; different partitions may include support structure areas, main functional areas, and fine feature areas; in a specific example, the geometric features of the support structure area may include a sag angle not greater than 45°, an ultra-thick structure within the partition greater than 5 mm, and a principal stress not greater than 20% of the yield strength; the geometric features of the main functional area may include a principal stress not less than 50% of the material's yield strength, and / or geometric features with a thickness of 1-5 mm and a radius of curvature of 2-10 mm; the geometric features of the fine feature area may include a geometric thin wall not greater than 1 mm, a small hole diameter not greater than 3 mm, and / or a maximum radius of curvature within the partition not greater than 2 mm.

[0028] The recommended process information can include the powder layer thickness for different zones, standard forging parameters, and standard cladding power.

[0029] Therefore, the partition data mapping table constructed based on the partition information of each layer and the configured process recommendation information can include the geometric position of different partitions in each layer, the powder layer thickness, standard forging parameters (including standard forging power and scanning speed), and standard cladding power.

[0030] Step S230: After traversing to the current layer among multiple layers according to the preset traversal order, control the powder spreading device to spread powder on the current layer according to the powder layer thickness and geometric position of different partitions, and obtain the layer to be printed.

[0031] The preset traversal order can be determined based on the positional relationship between multiple slices after slicing (i.e., the positional order of multiple slices superimposed), or it can be a pre-configured custom order. This application does not limit this.

[0032] In practice, after the control system traverses to the current layer among multiple layers according to the preset traversal order, it controls the powder spreading device to spread powder on each partition of the current layer according to the powder layer thickness and geometric position of different partitions, thereby obtaining the current layer after powder spreading, which is the layer to be printed. At this time, the powder spreading device can provide feedback to the control system to respond to the completion of powder spreading on the current layer.

[0033] The supporting structure area employs thickened ply layers to accelerate large-volume molding, the main functional area uses standard layer thickness to ensure structural strength, and the fine feature area uses thinned layer thickness to achieve high-precision contour control. The supporting structure area uses thickened powder layers, preferably 80-100μm; the main functional area uses standard layer thickness with uniform powder spreading; and the fine feature area uses thinned layer thickness with fine powder spreading, preferably 30μm. Specific values ​​are dynamically adjusted based on the material's thermophysical properties and feature dimensions, and the thickness variation rate between adjacent areas does not exceed 50%.

[0034] The thickness of each layer of powder coating should be the same. Matching scheme: When there are multiple types of areas, prioritize printing the fine feature areas. The main functional areas and supporting structure areas can be temporarily omitted. Print multiple layers of fine feature areas before printing the main functional areas and supporting structure areas. Specifically, the layer thickness of the main functional area should be twice that of the fine feature areas, and the layer thickness of the supporting structure area should be three times that of the fine feature areas.

[0035] Furthermore, after obtaining the printing layer (which can also be understood as the control system receiving a toner spreading completion response), the control system can detect the toner spreading quality of the layer. Specifically: The laser 3D scanner is controlled to detect the powder spreading quality of each zone in the layer to be printed, and a 3D dataset of each zone after powder spreading is obtained. When the error values ​​of the powder spreading flatness corresponding to the 3D dataset of each partition all meet the preset error conditions (i.e., meet the conditions for powder spreading quality compliance), it is determined that the powder spreading of the layer to be printed is complete. Among them, meeting the preset error conditions means that the error value of the powder spreading flatness is ≤ ±5μm.

[0036] When the error value of the powder spreading flatness corresponding to the 3D dataset of any partition is detected to be inconsistent with the preset error threshold, the powder spreading device is controlled to spread powder on the corresponding partition and the execution step is returned: control the laser 3D scanner to detect the powder spreading quality of each partition in the layer to be printed.

[0037] Step S240: Based on the powder coating thickness of different partitions and the power algorithm corresponding to the different partitions, adjust the standard cladding power to obtain the working power corresponding to different partitions.

[0038] Among them, the power algorithms corresponding to different partitions can include linear growth power algorithms for the support structure area, exponential compensation power algorithms for the fine feature area, and power algorithms that maintain standard cladding power for the main functional area.

[0039] (1) For the supporting structure area: The formula for the linearly increasing power algorithm can be expressed as: Where P is the operating power corresponding to the support structure area. This is the standard cladding power (e.g., 300W for 316L stainless steel). The current layer thickness (μm) The standard layer thickness is (usually 100 μm). This is a linear coefficient, which is material-dependent (steel: 2.0 W / μm, titanium alloy: 1.5 W / μm).

[0040] For example, for TC4 titanium alloy with a layer thickness of 180μm: P=300W+1.5×(180-100)=420W.

[0041] (2) For fine feature regions The formula for the exponentially compensated power algorithm can be expressed as: Where P is the operating power corresponding to the fine feature region. The standard cladding power is given, and δ represents the current layer thickness (μm). The standard layer thickness is (usually 100 μm). This is the material sensitivity coefficient, which is related to the material (steel: 0.008, titanium alloy: 0.005).

[0042] For example, in a 40μm thin-walled region: P = 300 × e^(0.005 × (40-100)) ≈ 222 W.

[0043] (3) For the main functional areas The operating power corresponding to the main functional area is the standard cladding power.

[0044] Step S250: Control the melting laser to perform partitioned melting scans of each zone in the layer to be printed according to the adjusted working power. The melting completion signal triggers the infrared thermal imager to monitor the thermal state of the molten pool of the corresponding zone after the melting laser scan in real time.

[0045] The trajectory of the melting laser is the same as that of the infrared thermal imager, and there is a preset distance between the center of the melting laser spot and the center of the infrared thermal imager spot.

[0046] The control system sends control commands, including adjustments to the operating power, to the molten laser. This directs the laser to perform zoned melting scans of each section of the wafer to be printed, according to the adjusted operating power. The completion signal of melting in any section triggers an infrared thermal imager to monitor the thermal state of the molten pool in the corresponding section in real time after the laser scan. The infrared thermal imager can then feed back the thermal state of the molten pool in each section of the wafer to be printed to the control system in real time.

[0047] Step S260: When the thermal state of the molten pool in the corresponding zone meets the preset thermal state, control the ultrafast laser to forge and print the corresponding zone according to the standard forging parameters.

[0048] Specifically, the control system can detect the thermal state of the molten pool in each zone of the sheet to be printed. If the thermal state of the molten pool in any zone meets the preset thermal state, the ultrafast laser is controlled to forge and print the corresponding zone according to the standard forging parameters. After the forging printing is completed in each partition of the layer to be printed, the next layer among the multiple layers traversed is taken as the new current layer according to the preset traversal order, and the process returns to step S230.

[0049] Furthermore, when the thermal state of the molten pool in the corresponding zone does not meet the preset thermal state, the working power of the corresponding zone is adjusted, and then the process returns to step S250: control the molten laser to scan the corresponding zone according to the adjusted working power.

[0050] Furthermore, after the control system controls the ultrafast laser to forge and print the corresponding zones according to standard forging parameters, it can also control the energy density sensor to monitor the forging energy generated during the forging and printing of the corresponding zones and feed it back to the control system. If the monitored forging energy reaches the preset energy threshold, then the forging of the corresponding zone is completed. If the monitored forging energy does not reach the preset energy threshold, return to the execution step: control the ultrafast laser to forge and print the corresponding partition according to the standard forging parameters.

[0051] Afterwards, multiple printed sheets can be stacked and cooled layer by layer to form a metal part.

[0052] In some embodiments, when the thermal state of the molten pool in a corresponding zone does not meet a preset thermal state, the operating power of the corresponding zone is adjusted, including: (1) Supporting structure area: If the molten pool temperature is too high (exceeding the preset thermal state upper limit), the power needs to be reduced: the linearity coefficient can be decreased. (such as steel) (Adjust from 2.0 W / μm to 1.8 W / μm), or directly subtract the correction value from the calculation result (e.g., reduce by 5%-10% according to the temperature difference ratio).

[0053] If the molten pool temperature is too low (below the preset thermal limit), the power needs to be increased; the linearity coefficient can be increased. (such as titanium alloys) (Adjust from 1.5W / μm to 1.7W / μm), or directly add a correction value based on the calculation result.

[0054] (2) Fine feature region: If the molten pool temperature is too high, the power should be reduced; this can decrease the material sensitivity coefficient. (such as titanium alloys) (Reduced from 0.005 to 0.004), or the exponential result is attenuated (e.g., multiplied by a coefficient of 0.9-0.95).

[0055] If the molten pool temperature is too low, the power needs to be increased; this can increase the material sensitivity coefficient. (such as steel) (Adjust from 0.008 to 0.009), or enhance the index result (such as by multiplying by a coefficient of 1.05-1.1).

[0056] (3) Main functional areas If the thermal state of the molten pool does not meet the preset value, the standard power is directly linearly corrected: If the temperature is too high, reduce the standard power (e.g., from 300W to 280-290W).

[0057] If the temperature is too low, increase the standard power (e.g., from 300W to 310-320W).

[0058] In other embodiments, when the thermal state of the molten pool in a corresponding zone does not meet a preset thermal state, the operating power of the corresponding zone is adjusted, including: A parameter adjustment formula can be set: P′=P•(1+α•ΔT), where P′ is the adjusted working power, α is the adjustment coefficient (set according to the material and working conditions), and ΔT is the deviation between the molten pool's thermal state and the preset thermal state. α can be adjusted based on the deviation between the molten pool temperature and the preset thermal state. If the deviation is large (e.g., exceeding 20%), it indicates that the current power adjustment may be insufficient, and α needs to be increased; if the deviation is small (e.g., less than 5%), α can be appropriately decreased to avoid over-adjustment.

[0059] Corresponding to the above method, embodiments of this application also provide a laser forging printing control device, such as... Figure 3 As shown, the device includes: The slicing unit 310 is used to slice the target 3D model in response to the received printing command to obtain multiple slices; The construction unit 320 is used to identify the geometric features of each layer, obtain the partition information of each layer, and construct a partition data mapping table based on the partition information of each layer and the configured process recommendation information. The partition data mapping table includes the geometric position of different partitions in each layer, the powder layer thickness, the standard forging parameters and the standard cladding power. The control unit 330 is used to control the powder spreading device to spread powder on the current layer according to the powder layer thickness and geometric position of the different partitions after traversing the current layer according to the preset traversal order, so as to obtain the layer to be printed. The adjustment unit 340 is used to adjust the standard cladding power based on the powder layer thickness of different zones and the power algorithm corresponding to the different zones, so as to obtain the working power corresponding to different zones. The control unit 330 is also used to control the melting laser to perform partition melting scans on each partition of the sheet to be printed according to the adjusted working power; the melting completion signal triggers the infrared thermal imager to monitor the thermal state of the molten pool of the corresponding partition after the melting laser scan in real time and feeds it back to the control system; and when the thermal state of the molten pool of the corresponding partition meets the preset thermal state, the control ultrafast laser is used to forge print the corresponding partition according to the standard forging parameters. The determining unit 350 is used to, after completing the forging printing of each partition of the sheet to be printed, take the next sheet among the traversed multiple sheets as the new current sheet and trigger the control unit to execute: control the powder spreading device to spread powder on the current sheet according to the powder layer thickness and partition information of the different partitions, until all sheets are traversed, so as to complete the forging printing of all sheets.

[0060] The functions of each functional unit of the laser forging printing control device provided in the above embodiments of this application can be realized through the above methods and steps. Therefore, the specific working process and beneficial effects of each unit in the laser forging printing control device provided in the embodiments of this application will not be repeated here.

[0061] This application also provides an electronic device, such as... Figure 4 As shown, it includes a processor 410, a communication interface 420, a memory 430, and a communication bus 440, wherein the processor 410, the communication interface 420, and the memory 430 communicate with each other through the communication bus 440.

[0062] Memory 430 is used to store computer programs; When the processor 410 executes the program stored in the memory 430, it performs the following steps: In response to the received print command, the target 3D model is sliced ​​to obtain multiple layers; After identifying the geometric features of each layer to obtain the partition information of each layer, a partition data mapping table is constructed based on the partition information of each layer and the configured process recommendation information. The partition data mapping table includes the geometric position of different partitions in each layer, the powder layer thickness, the standard forging parameters and the standard cladding power. After traversing the current layer according to the preset traversal order, the powder spreading device is controlled to spread powder on the current layer according to the powder layer thickness and geometric position of the different partitions to obtain the layer to be printed. Based on the powder coating thickness of different zones and the power algorithm corresponding to different zones, the standard cladding power is adjusted to obtain the working power corresponding to different zones; The melting laser is controlled to perform partitioned melting scans of each zone in the wafer to be printed according to the adjusted working power. The melting completion signal triggers an infrared thermal imager to monitor the thermal state of the molten pool in the corresponding zone after the melting laser scan in real time and feeds it back to the control system. When the molten pool thermal state of the corresponding zone meets the preset thermal state, the ultrafast laser is controlled to forge and print the corresponding zone according to the standard forging parameters; After each partition in the layer to be printed is completed, the next layer among the traversed layers is taken as the new current layer, and the process returns to the following steps: control the powder spreading device to spread powder on the current layer according to the powder layer thickness and partition information of the different partitions, until all layers are traversed to complete the forging printing of all layers.

[0063] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0064] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0065] The memory may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0066] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0067] The implementation methods and beneficial effects of the various components of the electronic device in the above embodiments for solving the problem can be found in [reference needed]. Figure 2 The steps in the illustrated embodiments are used to implement the electronic device. Therefore, the specific working process and beneficial effects of the electronic device provided in this application will not be repeated here.

[0068] In another embodiment provided in this application, a computer-readable storage medium is also provided, which stores instructions that, when executed on a computer, cause the computer to perform any of the laser forging printing control methods described in the above embodiments.

[0069] In another embodiment provided in this application, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute any of the laser forging printing control methods described in the above embodiments.

[0070] Those skilled in the art will understand that the embodiments in this application can be provided as methods, systems, or computer program products. Therefore, the embodiments in this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the embodiments in this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0071] This application describes embodiments of methods, apparatus (systems), and computer program products according to embodiments of this application with reference to flowchart illustrations and / or block diagrams. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0072] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0073] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0074] Although preferred embodiments have been described in this application, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of this application.

[0075] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of the embodiments of this application. Therefore, if these modifications and variations to the embodiments of this application fall within the scope of the claims in this application and their equivalents, then this application also intends to include these modifications and variations.

Claims

1. A laser forging printing control method, characterized in that, When applied in a control system, the method includes: In response to the received print command, the target 3D model is sliced ​​to obtain multiple layers; After identifying the geometric features of each layer to obtain the partition information of each layer, a partition data mapping table is constructed based on the partition information of each layer and the configured process recommendation information. The partition data mapping table includes the geometric position of different partitions in each layer, the powder layer thickness, the standard forging parameters and the standard cladding power. After traversing the current layer according to the preset traversal order, the powder spreading device is controlled to spread powder on the current layer according to the powder layer thickness and geometric position of the different partitions to obtain the layer to be printed. Based on the powder coating thickness of different zones and the power algorithm corresponding to different zones, the standard cladding power is adjusted to obtain the working power corresponding to different zones; The melting laser is controlled to perform partitioned melting scans of each zone in the wafer to be printed according to the adjusted working power. The melting completion signal triggers an infrared thermal imager to monitor the thermal state of the molten pool in the corresponding zone after the melting laser scan in real time and feeds it back to the control system. When the molten pool thermal state of the corresponding zone meets the preset thermal state, the ultrafast laser is controlled to forge and print the corresponding zone according to the standard forging parameters; After each partition in the layer to be printed is completed, the next layer among the traversed layers is taken as the new current layer, and the process returns to the following steps: control the powder spreading device to spread powder on the current layer according to the powder layer thickness and partition information of the different partitions, until all layers are traversed to complete the forging printing of all layers.

2. The method as described in claim 1, characterized in that, After obtaining the sheet layer to be printed, the method further includes: The laser 3D scanner is controlled to detect the powder spreading quality of each zone in the layer to be printed, and a 3D dataset of each zone after powder spreading is obtained. When the error values ​​of powder spreading flatness corresponding to the three-dimensional dataset of each partition are all found to meet the preset error conditions, it is determined that the powder spreading of the layer to be printed is complete.

3. The method as described in claim 2, characterized in that, The method further includes: When the error value of the powder spreading flatness corresponding to the 3D dataset of any partition is detected to be inconsistent with the preset error threshold, the powder spreading device is controlled to spread powder on the corresponding partition and the execution step is returned: control the laser 3D scanner to detect the powder spreading quality of each partition in the layer to be printed.

4. The method as described in claim 1, characterized in that, The partitioning information includes the geometric position of different partitions on the corresponding slice and the geometric features of different partitions; The different zones include a support structure zone, a main functional zone, and a fine feature zone; The geometric characteristics of the supporting structure area include a sag angle of no more than 45°, an ultra-thick structure within the area of ​​more than 5 mm, and a bearing principal stress of no more than 20% of the yield strength. The geometric features of the main functional area include bearing principal stress not less than 50% of the material yield strength, and / or having a thickness of 1-5 mm and a curvature radius of 2-10 mm. The geometric features of the fine feature region include a geometric thin wall of no more than 1 mm, a small hole diameter of no more than 3 mm, and a maximum radius of curvature of no more than 2 mm within the region.

5. The method as described in claim 4, characterized in that, The power algorithms corresponding to the different partitions include the linear growth power algorithm corresponding to the support structure region, the exponential compensation power algorithm corresponding to the fine feature region, and the power algorithm that maintains the standard cladding power corresponding to the main functional region.

6. The method as described in claim 1, characterized in that, The method further includes: When the thermal state of the molten pool in the corresponding zone does not meet the preset thermal state, the working power of the corresponding zone is adjusted, and the execution step is returned: control the molten laser to scan the corresponding zone according to the adjusted working power.

7. The method as described in claim 1, characterized in that, After controlling the ultrafast laser to forge and print the corresponding zones according to standard forging parameters, the method further includes: Control the energy density sensor to monitor the forging energy generated during forging printing of the corresponding zone and feed it back to the control system; If the monitored forging energy reaches the preset energy threshold, then the forging of the corresponding zone is completed. If the monitored forging energy does not reach the preset energy threshold, return to the execution step: control the ultrafast laser to forge and print the corresponding partition according to the standard forging parameters.

8. A laser forging printing control device, characterized in that, The device, used in a control system, includes: The slicing unit is used to slice the target 3D model in response to the received printing command, resulting in multiple slices; The construction unit is used to identify the geometric features of each layer, obtain the partition information of each layer, and construct a partition data mapping table based on the partition information of each layer and the configured process recommendation information. The partition data mapping table includes the geometric position of different partitions in each layer, powder layer thickness, standard forging parameters and standard cladding power. The control unit is used to control the powder spreading device to spread powder on the current layer according to the powder layer thickness and geometric position of the different partitions after traversing the current layer in a preset traversal order, so as to obtain the layer to be printed. The adjustment unit is used to adjust the standard cladding power based on the powder layer thickness of different zones and the power algorithm corresponding to the different zones, so as to obtain the working power corresponding to different zones. The control unit is also used to control the melting laser to perform partitioned melting scanning of each partition in the layer to be printed according to the adjusted working power; the melting completion signal triggers the infrared thermal imager to monitor the thermal state of the molten pool of the corresponding partition after the melting laser scan in real time and feeds it back to the control system; and when the thermal state of the molten pool of the corresponding partition meets the preset thermal state, the control unit controls the ultrafast laser to forge and print the corresponding partition according to the standard forging parameters. The determining unit is used to determine the next layer among the multiple layers traversed after the forging printing of each partition of the layer to be printed is completed, and to trigger the control unit to execute: control the powder spreading device to spread powder on the current layer according to the powder layer thickness and partition information of the different partitions, until all layers are traversed, so as to complete the forging printing of all layers.

9. An electronic device, characterized in that, The electronic device includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the method of any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method described in any one of claims 1-7.

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