Complex workpiece manufacturing method based on laser additive manufacturing and related device

Abstract

The invention discloses a complex workpiece manufacturing method based on laser additive manufacturing and a related device. The method comprises the steps that a to-be-worked face three-dimensional model diagram, base material melting point parameters and deposition material parameters corresponding to a complex workpiece to be subjected to heterogeneous material additive deposition manufacturing are obtained; the base material melting point parameters and the deposition material parameters corresponding to the complex workpiece are input into the deposition manufacturing simulation model, additive deposition manufacturing simulation treatment is carried out according to different laser beam powers, and an additive deposition manufacturing simulation result is obtained; confirming laser beam power parameters during actual deposition manufacturing based on an additive deposition manufacturing simulation result; path planning treatment of additive deposition manufacturing is conducted, and a planned path of additive deposition manufacturing is obtained; and laser additive manufacturing equipment is controlled to execute additive deposition manufacturing treatment on the surface of the complex workpiece according to the planned path and the laser beam power parameters. In the embodiment of the invention, the additive manufacturing of the heterogeneous material on the surface of the complex workpiece is realized, and the manufacturing precision is relatively high.

Description

Technical Field

[0001] The present invention relates to the field of intelligent manufacturing technology, and in particular to a method for manufacturing complex workpieces based on laser additive manufacturing and related devices. Background Art

[0002] With the maturity of laser additive manufacturing technology, the use of laser additive manufacturing technology to perform additive manufacturing of key components of equipment can effectively improve manufacturing efficiency; however, since the control accuracy of existing laser additive manufacturing needs to be further improved, some precision components, such as gears and bearings, cannot be manufactured by additive deposition using heterogeneous materials. This is because the control accuracy in additive deposition manufacturing is insufficient, resulting in some precision components after additive deposition manufacturing failing to meet corresponding requirements, such as large thermal stress marks or large dimensional changes after the additive deposition of heterogeneous materials on the surface. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art. The present invention provides a method and related devices for manufacturing complex workpieces based on laser additive manufacturing, which can realize additive manufacturing of heterogeneous materials on the surface of complex workpieces with high manufacturing precision.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a method for manufacturing a complex workpiece based on laser additive manufacturing, which is applied to the additive deposition manufacturing of a complex workpiece surface by a laser additive manufacturing device. The method includes:

[0005] Obtaining a three-dimensional model of a work surface corresponding to a complex workpiece to be manufactured by additive deposition of heterogeneous materials, a base material melting point parameter, and deposition material parameters, wherein the deposition material parameters include a base deposition material composition, a particle diameter parameter, and a deposition material melting point parameter;

[0006] Inputting the melting point parameter of the substrate and the deposition material parameter corresponding to the complex workpiece into a deposition manufacturing simulation model, and performing additive deposition manufacturing simulation processing according to different laser beam powers in the deposition manufacturing simulation model to obtain additive deposition manufacturing simulation results;

[0007] confirming laser beam power parameters during actual deposition manufacturing based on the additive deposition manufacturing simulation results;

[0008] Performing path planning processing for additive deposition manufacturing based on the three-dimensional model of the surface to be worked on and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters to obtain a planned path for additive deposition manufacturing;

[0009] The laser additive manufacturing device is controlled to perform additive deposition manufacturing processing on the surface of the complex workpiece according to the planned path and the laser beam power parameters.

[0010] Optionally, obtaining a three-dimensional model of a work surface corresponding to a complex workpiece to be manufactured by additive deposition of heterogeneous materials, substrate melting point parameters, and deposition material parameters includes:

[0011] The input interface of the laser additive manufacturing device receives the input of the three-dimensional model, substrate melting point parameters, and deposition material parameters corresponding to the complex workpiece to be manufactured by heterogeneous material additive deposition according to the permission information and prompts of the operating user;

[0012] After receiving the three-dimensional model, the laser additive manufacturing device prompts the operating user to specify a corresponding surface to be worked on in the three-dimensional model, and obtains a three-dimensional model diagram of the surface to be worked on in the three-dimensional model based on the surface to be worked on specified by the operating user.

[0013] Optionally, performing simulation processing of additive deposition manufacturing according to different laser beam powers in the deposition manufacturing simulation model to obtain additive deposition manufacturing simulation results includes:

[0014] In the deposition manufacturing simulation model, a simulated powder feeding speed and a simulated powder feeding angle of the simulated powder feeding nozzle are set so that a size of a simulated powder spot formed by the simulated powder feeding nozzle during the simulated powder feeding is within a preset range, and a distance from the formed simulated powder spot to the simulated powder feeding nozzle is a first preset distance;

[0015] The focal length of the simulated laser beam in the deposition manufacturing simulation model is adjusted on the simulated powder spot, and the additive deposition manufacturing simulation process is performed according to different laser beam powers and different moving speeds to obtain the additive deposition manufacturing simulation result.

[0016] Optionally, the deposition manufacturing simulation model is constructed by calling a twin digital network in a simulation application software according to the equipment parameters of the laser additive manufacturing equipment.

[0017] Optionally, the confirming of laser beam power parameters during actual deposition manufacturing based on the additive deposition manufacturing simulation results includes:

[0018] Obtaining simulated molten pool temperature data, simulated molten pool width data, and simulated molten pool thickness data corresponding to simulated molten pools formed at different laser beam powers and different moving speeds in the additive deposition manufacturing simulation results;

[0019] The laser beam power parameters and moving speed during actual deposition manufacturing are confirmed based on the simulated molten pool temperature data, simulated molten pool width data and simulated molten pool thickness data corresponding to the simulated molten pool formed under different laser beam powers and different moving speeds.

[0020] Optionally, performing path planning processing for additive deposition manufacturing based on the three-dimensional model of the surface to be worked on and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters to obtain a planned path for additive deposition manufacturing includes:

[0021] Determining a starting point for operation on the three-dimensional model of the surface to be operated, and obtaining simulated molten pool width data formed on the substrate surface under the laser beam power parameters;

[0022] The path planning processing of additive deposition manufacturing is performed on the three-dimensional model diagram of the work surface according to the shortest path planning algorithm based on the work starting point, the simulated molten pool width data and the set overlap rate between two adjacent paths to obtain a planned path for additive deposition manufacturing.

[0023] Optionally, controlling the laser additive manufacturing device to perform additive deposition manufacturing processing on the complex workpiece surface according to the planned path and the laser beam power parameters includes:

[0024] configuring a powder feeding nozzle of the laser additive manufacturing device according to a simulated powder feeding speed and a simulated powder feeding angle set in the deposition manufacturing simulation model, and causing the powder feeding nozzle to form powder spots on the surface of the substrate when feeding powder;

[0025] After the powder feeding nozzle is set, the focal length of the laser beam in the laser additive manufacturing device is configured according to the focal length of the simulated laser beam in the deposition manufacturing simulation model to form a configured laser additive manufacturing device;

[0026] The configured laser additive operation equipment performs additive deposition manufacturing processing on the complex workpiece surface according to the planned path and the laser beam power parameters with the distance between the powder feeding nozzle and the substrate surface maintained at a first preset distance.

[0027] In addition, an embodiment of the present invention further provides a complex workpiece manufacturing device based on laser additive manufacturing, which is applied to the laser additive manufacturing equipment for additive deposition manufacturing on the surface of a complex workpiece, and the device includes:

[0028] An acquisition module is used to obtain a three-dimensional model of a work surface corresponding to a complex workpiece to be manufactured by additive deposition of heterogeneous materials, a base material melting point parameter, and deposition material parameters, wherein the deposition material parameters include base deposition material composition, particle diameter parameter, and deposition material melting point parameter;

[0029] A simulation processing module is configured to input the melting point parameters of the substrate and the deposition material parameters corresponding to the complex workpiece into a deposition manufacturing simulation model, and perform additive deposition manufacturing simulation processing according to different laser beam powers in the deposition manufacturing simulation model to obtain additive deposition manufacturing simulation results;

[0030] Confirmation module: used to confirm the laser beam power parameters and movement speed during actual deposition manufacturing based on the additive deposition manufacturing simulation results;

[0031] A path planning module is configured to perform path planning processing for additive deposition manufacturing based on the three-dimensional model of the surface to be worked on and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters, thereby obtaining a planned path for additive deposition manufacturing;

[0032] Additive manufacturing control module: used to control the laser additive manufacturing equipment to perform additive deposition manufacturing processing on the surface of the complex workpiece according to the planned path, the laser beam power parameters and the moving speed.

[0033] In addition, an embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the processor runs a computer program or code stored in the memory to implement any of the complex workpiece manufacturing methods described above.

[0034] In addition, an embodiment of the present invention further provides a computer-readable storage medium for storing a computer program or code. When the computer program or code is executed by a processor, the complex workpiece manufacturing method as described in any one of the above is implemented.

[0035] In an embodiment of the present invention, before performing additive deposition manufacturing of heterogeneous materials on a complex workpiece, it is necessary to input the substrate melting point parameters and deposition material parameters corresponding to the complex workpiece into a deposition manufacturing simulation model to perform simulation processing of additive deposition manufacturing, and then confirm the laser beam power parameters during actual deposition manufacturing based on the additive deposition manufacturing simulation results; then perform path planning processing, and finally control the laser additive manufacturing equipment to perform additive deposition manufacturing processing on the surface of the complex workpiece according to the planned path and laser beam power parameters; thereby realizing additive deposition manufacturing of heterogeneous materials on the surface of complex workpieces or precision parts; improving the accuracy of additive deposition manufacturing of heterogeneous materials, and reducing problems such as cracking due to thermal stress or other problems during the manufacturing process; thereby reducing the scrap rate of complex workpieces or precision parts in additive deposition manufacturing of heterogeneous materials, and reducing the cost of additive deposition manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1is a schematic flow chart of a method for manufacturing a complex workpiece based on laser additive manufacturing in an embodiment of the present invention;

[0038] Figure 2 is a schematic flow chart of a method for manufacturing a complex workpiece based on laser additive manufacturing in another embodiment of the present invention;

[0039] Figure 3 Schematic diagram of the structure of a complex workpiece manufacturing device based on laser additive manufacturing in an embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] For example 1, please refer to Figure 1 , Figure 1 It is a schematic flow chart of a method for manufacturing a complex workpiece based on laser additive manufacturing in an embodiment of the present invention.

[0043] like Figure 1 As shown, a method for manufacturing a complex workpiece based on laser additive manufacturing is applied to the additive deposition manufacturing of the complex workpiece surface by laser additive manufacturing equipment, and the method includes:

[0044] S101: Obtaining a three-dimensional model of a work surface corresponding to a complex workpiece to be manufactured by additive deposition of heterogeneous materials, a base material melting point parameter, and deposition material parameters, wherein the deposition material parameters include a base deposition material composition, a particle diameter parameter, and a deposition material melting point parameter;

[0045] In the specific implementation process of the present invention, the input interface of the laser additive manufacturing device receives the three-dimensional model, substrate melting point parameters and deposition material parameters corresponding to the complex workpiece to be manufactured by heterogeneous material additive deposition according to the permission information and prompts of the operating user; after receiving the three-dimensional model, the laser additive manufacturing device prompts the operating user to specify the corresponding surface to be worked on in the three-dimensional model, and obtains a three-dimensional model diagram of the surface to be worked on in the three-dimensional model based on the surface to be worked specified by the operating user.

[0046] Specifically, the laser additive manufacturing equipment is provided with a powder feeding nozzle, which is a dual-channel coaxial nozzle; the powder feeding angle and powder feeding speed of the powder feeding nozzle can be fine-tuned according to actual needs, that is, the powder feeding speed can be adjusted according to the amount of powder required per unit time, and the powder feeding angle can be adjusted according to the size and distance of the powder spot to be formed; the focal length and laser power of the input laser beam can also be adjusted according to actual needs.

[0047] The laser additive manufacturing device has an input interface for data input; the operating user performs authority authentication processing on the input interface, and after the authority authentication is passed and the corresponding authority information is assigned, the operating user inputs the corresponding three-dimensional model, substrate melting point parameters and deposition material parameters corresponding to the complex workpiece to be manufactured by heterogeneous material additive deposition according to the assigned authority information and the prompted input rules on the input interface of the laser additive manufacturing device; and after the laser additive manufacturing device receives the three-dimensional model, the operating user is prompted to specify the corresponding surface to be worked on in the three-dimensional model, and the three-dimensional model diagram of the surface to be worked is obtained by the operating user specifying the surface to be worked; the deposition material parameters include base deposition material composition, particle diameter parameters and deposition material melting point parameters.

[0048] S102: Inputting the melting point parameter of the substrate and the deposition material parameter corresponding to the complex workpiece into a deposition manufacturing simulation model, and performing additive deposition manufacturing simulation processing according to different laser beam powers in the deposition manufacturing simulation model to obtain additive deposition manufacturing simulation results;

[0049] In the specific implementation process of the present invention, the simulation processing of additive deposition manufacturing is performed according to different laser beam powers in the deposition manufacturing simulation model to obtain the additive deposition manufacturing simulation result, including: setting the simulated powder feeding speed and simulated powder feeding angle of the simulated powder feeding nozzle in the deposition manufacturing simulation model so that the size of the simulated powder spot formed by the simulated powder feeding nozzle when performing simulated powder feeding is within a preset range, and the distance from the formed simulated powder spot to the simulated powder feeding nozzle is a first preset distance; adjusting the focal length of the simulated laser beam in the deposition manufacturing simulation model on the simulated powder spot, and performing the simulation processing of additive deposition manufacturing according to different laser beam powers and different moving speeds to obtain the additive deposition manufacturing simulation result.

[0050] Furthermore, the deposition manufacturing simulation model is constructed by calling a twin digital network in a simulation application software according to the equipment parameters of the laser additive manufacturing equipment.

[0051] Specifically, in order to solve the problem of how to find a suitable powder spraying speed and powder feeding angle of the powder feeding nozzle in additive deposition manufacturing (so that the size of the powder spot formed during powder feeding is more consistent with additive deposition manufacturing and the powder spot formed is just on the surface of the substrate), the distance between the powder feeding nozzle and the substrate, the laser power used in the additive deposition manufacturing process, the powder feeding movement speed of the powder feeding nozzle in the additive deposition manufacturing process, and other parameters all need to be optimized and fitted according to the substrate material properties, substrate melting point, and deposition material parameters during the actual execution of additive deposition manufacturing using laser additive manufacturing equipment. This process will require a lot of manpower and material resources to achieve. For example, it is necessary to manually operate the laser additive manufacturing equipment to perform different powder feeding speeds, different powder feeding angles, different distances between the powder feeding nozzle and the substrate, different laser beam focal lengths, and different laser beam powers on the workpiece to be worked on, and then collect the corresponding data. Finally, the optimal parameters are found in the data as the optimization parameters for optimization. This will require a large amount of manpower and consumables costs. Therefore, in order to solve these problems, in this embodiment, a deposition manufacturing simulation model is constructed on the simulation application software to perform simulation.

[0052] That is, the twin digital network is called in the simulation application software to construct a deposition manufacturing simulation model according to the equipment parameters of the laser additive manufacturing equipment; when forming the deposition manufacturing simulation model, the required size of the powder spot and the first distance between the formed powder spot and the powder feeding nozzle will be set in the deposition manufacturing simulation model; both the simulation of the powder feeding speed and the simulation of the powder feeding angle can be performed; thereby obtaining the simulated powder feeding speed and the simulated powder feeding angle; and then the simulated powder feeding nozzle is set according to the obtained simulated powder feeding speed and simulated powder feeding angle, so that the size of the simulated powder spot formed by the simulated powder feeding nozzle when performing simulated powder feeding is within the preset range, and the distance from the formed simulated powder spot to the simulated powder feeding nozzle is the first preset distance.

[0053] The focal length of the simulated laser beam in the deposition manufacturing simulation model is then adjusted so that the focal length is on the simulated powder spot. At this time, additive deposition manufacturing simulation processing is performed according to different laser beam powers and different movement speeds to obtain additive deposition manufacturing simulation results. These simulation results can then be analyzed to finally determine the optimal laser beam power and optimal movement speed.

[0054] S103: confirming laser beam power parameters and moving speed during actual deposition manufacturing based on the additive deposition manufacturing simulation results;

[0055] In the specific implementation process of the present invention, the confirmation of the laser beam power parameters in actual deposition manufacturing based on the additive deposition manufacturing simulation results includes: obtaining simulated melt pool temperature data, simulated melt pool width data and simulated melt pool thickness data corresponding to the simulated melt pool formed under different laser beam powers and different moving speeds in the additive deposition manufacturing simulation results; and confirming the laser beam power parameters and moving speed in actual deposition manufacturing based on the simulated melt pool temperature data, simulated melt pool width data and simulated melt pool thickness data corresponding to the simulated melt pool formed under different laser beam powers and different moving speeds.

[0056] Specifically, it is necessary to obtain the simulated melt pool temperature data, simulated melt pool width data and simulated melt pool thickness data corresponding to the simulated melt pool formed under different laser beam powers and different moving speeds in the additive deposition manufacturing simulation results; then select the simulated melt pool temperature data, simulated melt pool width data and simulated melt pool thickness data that all meet the required melt pool temperature data, melt pool width data and melt pool thickness data in the actual execution process. The corresponding laser beam power parameters and the corresponding moving speed are then performed a comprehensive linear weighting on the selected laser beam power parameters and corresponding moving speeds that meet the requirements, and finally the laser beam power parameters and corresponding moving speeds with the optimal results in the comprehensive linear weighted processing are selected as the laser beam power parameters and moving speeds during actual deposition manufacturing.

[0057] S104: performing additive deposition manufacturing path planning processing based on the three-dimensional model of the surface to be worked on and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters to obtain a planned additive deposition manufacturing path;

[0058] In the specific implementation process of the present invention, the path planning processing of additive deposition manufacturing is performed based on the three-dimensional model diagram of the surface to be worked and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters to obtain the planned path of additive deposition manufacturing, including: determining the operation starting point on the three-dimensional model diagram of the surface to be worked, and obtaining the simulated molten pool width data formed on the substrate surface under the laser beam power parameters; performing the path planning processing of additive deposition manufacturing on the three-dimensional model diagram of the surface to be worked according to the shortest path planning algorithm based on the operation starting point, the simulated molten pool width data and the set overlap rate between two adjacent paths to obtain the planned path of additive deposition manufacturing.

[0059] Specifically, it is first necessary to determine the operation starting point on the three-dimensional model diagram of the surface to be worked on. At this time, it is also necessary to obtain the simulated molten pool width data formed on the substrate surface when additive immersion manufacturing is performed under the confirmed laser beam power and moving speed; then set the overlap rate between the two adjacent paths; that is, the operation starting point, the simulated molten pool width data and the set overlap rate between the two adjacent paths can be used to perform the path planning processing of additive deposition manufacturing on the three-dimensional model diagram of the surface to be worked on according to the shortest path planning algorithm, and finally the planned path of additive deposition manufacturing can be obtained.

[0060] S105: Control the laser additive manufacturing device to perform additive deposition manufacturing processing on the surface of the complex workpiece according to the planned path, the laser beam power parameters and the moving speed.

[0061] In the specific implementation process of the present invention, the laser additive production equipment is controlled to perform the additive deposition manufacturing process of the complex workpiece surface according to the planned path, the laser beam power parameters and the moving speed, including: configuring the powder feeding nozzle of the laser additive operation equipment according to the simulated powder feeding speed and the simulated powder feeding angle set in the deposition manufacturing simulation model, and making the powder feeding nozzle form a powder spot on the surface of the substrate when performing powder feeding; after completing the setting of the powder feeding nozzle, configuring the focal length of the laser beam in the laser additive operation equipment according to the focal length of the simulated laser beam in the deposition manufacturing simulation model to form a configured laser additive operation equipment; controlling the configured laser additive operation equipment to perform the additive deposition manufacturing process of the complex workpiece surface according to the planned path, the laser beam power parameters and the moving speed with the distance between the powder feeding nozzle and the substrate surface maintained at a first preset distance.

[0062] Specifically, after simulation, it can be obtained that the powder spots formed at the corresponding powder feeding speed and powder feeding angle meet the requirements and the position height of the formed powder spots also meets the first preset distance between the powder feeding nozzle and the substrate surface; at this time, the powder feeding nozzle of the laser additive operation equipment can be configured according to the simulated powder feeding speed and simulated powder feeding angle obtained after simulation in the deposition manufacturing simulation model, and the powder feeding nozzle forms powder spots on the substrate surface when performing powder feeding.

[0063] After completing the setting of the powder feeding nozzle, the focal length of the laser beam in the laser additive operation equipment can be configured according to the focal length of the simulated laser beam in the deposition manufacturing simulation model to form a configured laser additive operation equipment; finally, the configured laser additive operation equipment can be controlled to perform additive deposition manufacturing processing on the surface of complex workpieces according to the planned path, laser beam power parameters and moving speed, with the distance between the powder feeding nozzle and the substrate surface maintained at a first preset distance.

[0064] In an embodiment of the present invention, before performing additive deposition manufacturing of heterogeneous materials on a complex workpiece, it is necessary to input the substrate melting point parameters and deposition material parameters corresponding to the complex workpiece into a deposition manufacturing simulation model to perform simulation processing of additive deposition manufacturing, and then confirm the laser beam power parameters during actual deposition manufacturing based on the additive deposition manufacturing simulation results; then perform path planning processing, and finally control the laser additive manufacturing equipment to perform additive deposition manufacturing processing on the surface of the complex workpiece according to the planned path and laser beam power parameters; thereby realizing additive deposition manufacturing of heterogeneous materials on the surface of complex workpieces or precision parts; improving the accuracy of additive deposition manufacturing of heterogeneous materials, and reducing problems such as cracking due to thermal stress or other problems during the manufacturing process; thereby reducing the scrap rate of complex workpieces or precision parts in additive deposition manufacturing of heterogeneous materials, and reducing the cost of additive deposition manufacturing.

[0065] For example 2, please refer to Figure 2 , Figure 2 It is a schematic flow chart of a method for manufacturing a complex workpiece based on laser additive manufacturing in another embodiment of the present invention.

[0066] like Figure 2 As shown, a method for manufacturing a complex workpiece based on laser additive manufacturing is applied to the additive deposition manufacturing of the complex workpiece surface by laser additive manufacturing equipment, and the method includes:

[0067] S201: obtaining a three-dimensional model of a work surface corresponding to a complex workpiece to be manufactured by additive deposition of heterogeneous materials, a base material melting point parameter, and deposition material parameters, wherein the deposition material parameters include a base deposition material composition, a particle diameter parameter, and a deposition material melting point parameter;

[0068] S202: Setting a simulated powder feeding speed and a simulated powder feeding angle of a simulated powder feeding nozzle in the deposition manufacturing simulation model so that a size of a simulated powder spot formed by the simulated powder feeding nozzle during simulated powder feeding is within a preset range, and a distance from the formed simulated powder spot to the simulated powder feeding nozzle is a first preset distance;

[0069] S203: adjusting the focal length of the simulated laser beam in the deposition manufacturing simulation model to the simulated powder spot, and performing additive deposition manufacturing simulation processing according to different laser beam powers and different moving speeds to obtain additive deposition manufacturing simulation results;

[0070] S204: confirming laser beam power parameters and moving speed during actual deposition manufacturing based on the additive deposition manufacturing simulation results;

[0071] S205: performing additive deposition manufacturing path planning processing based on the three-dimensional model of the surface to be worked on and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters to obtain a planned additive deposition manufacturing path;

[0072] S206: configuring a powder feeding nozzle of the laser additive manufacturing device according to the simulated powder feeding speed and simulated powder feeding angle set in the deposition manufacturing simulation model, and causing the powder feeding nozzle to form powder spots on the surface of the substrate when feeding powder;

[0073] S207: After the powder feeding nozzle is set, the focal length of the laser beam in the laser additive manufacturing device is configured according to the focal length of the simulated laser beam in the deposition manufacturing simulation model to form a configured laser additive manufacturing device;

[0074] S208: Controlling the configured laser additive operation equipment to perform additive deposition manufacturing processing on the complex workpiece surface according to the planned path, the laser beam power parameters and the moving speed, with the distance between the powder feeding nozzle and the substrate surface maintained at a first preset distance.

[0075] The specific implementation of the second embodiment can be found in the above embodiments, which will not be described in detail here.

[0076] For example three, please refer to Figure 3 , Figure 3 It is a schematic diagram of the structural composition of a complex workpiece manufacturing device based on laser additive manufacturing in an embodiment of the present invention.

[0077] like Figure 3 As shown, a complex workpiece manufacturing device based on laser additive manufacturing is applied to the additive deposition manufacturing of the complex workpiece surface by laser additive manufacturing equipment, and the device includes:

[0078] Acquisition module 301: for obtaining a three-dimensional model of a work surface corresponding to a complex workpiece to be manufactured by additive deposition of heterogeneous materials, a base material melting point parameter, and deposition material parameters, wherein the deposition material parameters include base deposition material composition, particle diameter parameter, and deposition material melting point parameter;

[0079] In the specific implementation process of the present invention, the input interface of the laser additive manufacturing device receives the three-dimensional model, substrate melting point parameters and deposition material parameters corresponding to the complex workpiece to be manufactured by heterogeneous material additive deposition according to the permission information and prompts of the operating user; after receiving the three-dimensional model, the laser additive manufacturing device prompts the operating user to specify the corresponding surface to be worked on in the three-dimensional model, and obtains a three-dimensional model diagram of the surface to be worked on in the three-dimensional model based on the surface to be worked specified by the operating user.

[0080] Specifically, the laser additive manufacturing equipment is provided with a powder feeding nozzle, which is a dual-channel coaxial nozzle; the powder feeding angle and powder feeding speed of the powder feeding nozzle can be fine-tuned according to actual needs, that is, the powder feeding speed can be adjusted according to the amount of powder required per unit time, and the powder feeding angle can be adjusted according to the size and distance of the powder spot to be formed; the focal length and laser power of the input laser beam can also be adjusted according to actual needs.

[0081] The laser additive manufacturing device has an input interface for data input; the operating user performs authority authentication processing on the input interface, and after the authority authentication is passed and the corresponding authority information is assigned, the operating user inputs the corresponding three-dimensional model, substrate melting point parameters and deposition material parameters corresponding to the complex workpiece to be manufactured by heterogeneous material additive deposition according to the assigned authority information and the prompted input rules on the input interface of the laser additive manufacturing device; and after the laser additive manufacturing device receives the three-dimensional model, the operating user is prompted to specify the corresponding surface to be worked on in the three-dimensional model, and the three-dimensional model diagram of the surface to be worked is obtained by the operating user specifying the surface to be worked; the deposition material parameters include base deposition material composition, particle diameter parameters and deposition material melting point parameters.

[0082] Simulation processing module 302: used to input the substrate melting point parameters and the deposition material parameters corresponding to the complex workpiece into a deposition manufacturing simulation model, and perform additive deposition manufacturing simulation processing according to different laser beam powers in the deposition manufacturing simulation model to obtain additive deposition manufacturing simulation results;

[0083] In the specific implementation process of the present invention, the simulation processing of additive deposition manufacturing is performed according to different laser beam powers in the deposition manufacturing simulation model to obtain the additive deposition manufacturing simulation result, including: setting the simulated powder feeding speed and simulated powder feeding angle of the simulated powder feeding nozzle in the deposition manufacturing simulation model so that the size of the simulated powder spot formed by the simulated powder feeding nozzle when performing simulated powder feeding is within a preset range, and the distance from the formed simulated powder spot to the simulated powder feeding nozzle is a first preset distance; adjusting the focal length of the simulated laser beam in the deposition manufacturing simulation model on the simulated powder spot, and performing the simulation processing of additive deposition manufacturing according to different laser beam powers and different moving speeds to obtain the additive deposition manufacturing simulation result.

[0084] Furthermore, the deposition manufacturing simulation model is constructed by calling a twin digital network in a simulation application software according to the equipment parameters of the laser additive manufacturing equipment.

[0085] Specifically, in order to solve the problem of how to find a suitable powder spraying speed and powder feeding angle of the powder feeding nozzle in additive deposition manufacturing (so that the size of the powder spot formed during powder feeding is more consistent with additive deposition manufacturing and the powder spot formed is just on the surface of the substrate), the distance between the powder feeding nozzle and the substrate, the laser power used in the additive deposition manufacturing process, the powder feeding movement speed of the powder feeding nozzle in the additive deposition manufacturing process, and other parameters all need to be optimized and fitted according to the substrate material properties, substrate melting point, and deposition material parameters during the actual execution of additive deposition manufacturing using laser additive manufacturing equipment. This process will require a lot of manpower and material resources to achieve. For example, it is necessary to manually operate the laser additive manufacturing equipment to perform different powder feeding speeds, different powder feeding angles, different distances between the powder feeding nozzle and the substrate, different laser beam focal lengths, and different laser beam powers on the workpiece to be worked on, and then collect the corresponding data. Finally, the optimal parameters are found in the data as the optimization parameters for optimization. This will require a large amount of manpower and consumables costs. Therefore, in order to solve these problems, in this embodiment, a deposition manufacturing simulation model is constructed on the simulation application software to perform simulation.

[0086] That is, the twin digital network is called in the simulation application software to construct a deposition manufacturing simulation model according to the equipment parameters of the laser additive manufacturing equipment; when forming the deposition manufacturing simulation model, the required size of the powder spot and the first distance between the formed powder spot and the powder feeding nozzle will be set in the deposition manufacturing simulation model; both the simulation of the powder feeding speed and the simulation of the powder feeding angle can be performed; thereby obtaining the simulated powder feeding speed and the simulated powder feeding angle; and then the simulated powder feeding nozzle is set according to the obtained simulated powder feeding speed and simulated powder feeding angle, so that the size of the simulated powder spot formed by the simulated powder feeding nozzle when performing simulated powder feeding is within the preset range, and the distance from the formed simulated powder spot to the simulated powder feeding nozzle is the first preset distance.

[0087] The focal length of the simulated laser beam in the deposition manufacturing simulation model is then adjusted so that the focal length is on the simulated powder spot. At this time, additive deposition manufacturing simulation processing is performed according to different laser beam powers and different movement speeds to obtain additive deposition manufacturing simulation results. These simulation results can then be analyzed to finally determine the optimal laser beam power and optimal movement speed.

[0088] Confirmation module 303: used to confirm the laser beam power parameters and movement speed during actual deposition manufacturing based on the additive deposition manufacturing simulation results;

[0089] In the specific implementation process of the present invention, the confirmation of the laser beam power parameters in actual deposition manufacturing based on the additive deposition manufacturing simulation results includes: obtaining simulated melt pool temperature data, simulated melt pool width data and simulated melt pool thickness data corresponding to the simulated melt pool formed under different laser beam powers and different moving speeds in the additive deposition manufacturing simulation results; and confirming the laser beam power parameters and moving speed in actual deposition manufacturing based on the simulated melt pool temperature data, simulated melt pool width data and simulated melt pool thickness data corresponding to the simulated melt pool formed under different laser beam powers and different moving speeds.

[0090] Specifically, it is necessary to obtain the simulated melt pool temperature data, simulated melt pool width data and simulated melt pool thickness data corresponding to the simulated melt pool formed under different laser beam powers and different moving speeds in the additive deposition manufacturing simulation results; then select the simulated melt pool temperature data, simulated melt pool width data and simulated melt pool thickness data that all meet the required melt pool temperature data, melt pool width data and melt pool thickness data in the actual execution process. The corresponding laser beam power parameters and the corresponding moving speed are then performed a comprehensive linear weighting on the selected laser beam power parameters and corresponding moving speeds that meet the requirements, and finally the laser beam power parameters and corresponding moving speeds with the optimal results in the comprehensive linear weighted processing are selected as the laser beam power parameters and moving speeds during actual deposition manufacturing.

[0091] Path planning module 304: configured to perform path planning processing for additive deposition manufacturing based on the three-dimensional model of the work surface and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters, thereby obtaining a planned path for additive deposition manufacturing;

[0092] In the specific implementation process of the present invention, the path planning processing of additive deposition manufacturing is performed based on the three-dimensional model diagram of the surface to be worked and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters to obtain the planned path of additive deposition manufacturing, including: determining the operation starting point on the three-dimensional model diagram of the surface to be worked, and obtaining the simulated molten pool width data formed on the substrate surface under the laser beam power parameters; performing the path planning processing of additive deposition manufacturing on the three-dimensional model diagram of the surface to be worked according to the shortest path planning algorithm based on the operation starting point, the simulated molten pool width data and the set overlap rate between two adjacent paths to obtain the planned path of additive deposition manufacturing.

[0093] Specifically, it is first necessary to determine the operation starting point on the three-dimensional model diagram of the surface to be worked on. At this time, it is also necessary to obtain the simulated molten pool width data formed on the substrate surface when additive immersion manufacturing is performed under the confirmed laser beam power and moving speed; then set the overlap rate between the two adjacent paths; that is, the operation starting point, the simulated molten pool width data and the set overlap rate between the two adjacent paths can be used to perform the path planning processing of additive deposition manufacturing on the three-dimensional model diagram of the surface to be worked on according to the shortest path planning algorithm, and finally the planned path of additive deposition manufacturing can be obtained.

[0094] Additive manufacturing control module 305: used to control the laser additive manufacturing equipment to perform additive deposition manufacturing processing on the surface of the complex workpiece according to the planned path, the laser beam power parameters and the moving speed.

[0095] In the specific implementation process of the present invention, the laser additive production equipment is controlled to perform the additive deposition manufacturing process of the complex workpiece surface according to the planned path, the laser beam power parameters and the moving speed, including: configuring the powder feeding nozzle of the laser additive operation equipment according to the simulated powder feeding speed and the simulated powder feeding angle set in the deposition manufacturing simulation model, and making the powder feeding nozzle form a powder spot on the surface of the substrate when performing powder feeding; after completing the setting of the powder feeding nozzle, configuring the focal length of the laser beam in the laser additive operation equipment according to the focal length of the simulated laser beam in the deposition manufacturing simulation model to form a configured laser additive operation equipment; controlling the configured laser additive operation equipment to perform the additive deposition manufacturing process of the complex workpiece surface according to the planned path, the laser beam power parameters and the moving speed with the distance between the powder feeding nozzle and the substrate surface maintained at a first preset distance.

[0096] Specifically, after simulation, it can be obtained that the powder spots formed at the corresponding powder feeding speed and powder feeding angle meet the requirements and the position height of the formed powder spots also meets the first preset distance between the powder feeding nozzle and the substrate surface; at this time, the powder feeding nozzle of the laser additive operation equipment can be configured according to the simulated powder feeding speed and simulated powder feeding angle obtained after simulation in the deposition manufacturing simulation model, and the powder feeding nozzle forms powder spots on the substrate surface when performing powder feeding.

[0097] After completing the setting of the powder feeding nozzle, the focal length of the laser beam in the laser additive operation equipment can be configured according to the focal length of the simulated laser beam in the deposition manufacturing simulation model to form a configured laser additive operation equipment; finally, the configured laser additive operation equipment can be controlled to perform additive deposition manufacturing processing on the surface of complex workpieces according to the planned path, laser beam power parameters and moving speed, with the distance between the powder feeding nozzle and the substrate surface maintained at a first preset distance.

[0098] In an embodiment of the present invention, before performing additive deposition manufacturing of heterogeneous materials on a complex workpiece, it is necessary to input the substrate melting point parameters and deposition material parameters corresponding to the complex workpiece into a deposition manufacturing simulation model to perform simulation processing of additive deposition manufacturing, and then confirm the laser beam power parameters during actual deposition manufacturing based on the additive deposition manufacturing simulation results; then perform path planning processing, and finally control the laser additive manufacturing equipment to perform additive deposition manufacturing processing on the surface of the complex workpiece according to the planned path and laser beam power parameters; thereby realizing additive deposition manufacturing of heterogeneous materials on the surface of complex workpieces or precision parts; improving the accuracy of additive deposition manufacturing of heterogeneous materials, and reducing problems such as cracking due to thermal stress or other problems during the manufacturing process; thereby reducing the scrap rate of complex workpieces or precision parts in additive deposition manufacturing of heterogeneous materials, and reducing the cost of additive deposition manufacturing.

[0099] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the complex workpiece manufacturing method of any one of the above embodiments is implemented. The computer-readable storage medium includes, but is not limited to, any type of disk (including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks), ROM (Read-Only Memory), RAM (Random Access Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic cards, or optical cards. In other words, the storage device includes any medium that can be used by a device (e.g., a computer, a mobile phone) to store or transmit information in a readable form, which can be a read-only memory, a disk, or an optical disk, etc.

[0100] An embodiment of the present invention further provides a computer application program that runs on a computer and is used to execute the complex workpiece manufacturing method of any one of the above embodiments.

[0101] also, Figure 4 It is a schematic diagram of the structure of an electronic device in an embodiment of the present invention.

[0102] The embodiment of the present invention further provides an electronic device, such as Figure 4 The electronic device includes a processor 402, a memory 403, an input unit 404, a display unit 405 and other components. It can be understood by those skilled in the art that Figure 4The structural components of the electronic device shown do not constitute a limitation on all devices, and may include more or fewer components than shown, or combine certain components. The memory 403 can be used to store the application 401 and various functional modules, and the processor 402 runs the application 401 stored in the memory 403, thereby executing various functional applications and data processing of the device. The memory can be an internal memory or an external memory, or include both internal and external memories. The internal memory may include a read-only memory (ROM), a programmable ROM (PROM), an electrically programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a flash memory, or a random access memory. The external memory may include a hard disk, a floppy disk, a ZIP disk, a USB flash drive, a magnetic tape, etc. The memory disclosed in the present invention includes but is not limited to these types of memories. The memory disclosed in the present invention is only an example and not a limitation.

[0103] The input unit 404 is used to receive input signals and keywords entered by the user. The input unit 404 may include a touch panel and other input devices. The touch panel can collect user touch operations on or near it (such as operations performed by the user using a finger, stylus, or any other suitable object or accessory on or near the touch panel) and drive the corresponding connected device according to a pre-set program; other input devices may include, but are not limited to, one or more of a physical keyboard, function keys (such as playback control keys, on / off keys, etc.), a trackball, a mouse, a joystick, etc. The display unit 405 can be used to display information entered by the user or information provided to the user, as well as various menus of the terminal device. The display unit 405 can be in the form of a liquid crystal display, an organic light-emitting diode, etc. The processor 402 is the control center of the terminal device, connecting the various parts of the entire device using various interfaces and lines. It performs various functions and processes data by running or executing software programs and / or modules stored in the memory 403 and calling data stored in the memory.

[0104] As an embodiment, the electronic device includes: one or more processors 402, a memory 403, and one or more applications 401, wherein the one or more applications 401 are stored in the memory 403 and are configured to be executed by the one or more processors 402, and the one or more applications 401 are configured to execute the corresponding complex workpiece manufacturing method in any of the above-mentioned embodiments.

[0105] In an embodiment of the present invention, before performing additive deposition manufacturing of heterogeneous materials on a complex workpiece, it is necessary to input the substrate melting point parameters and deposition material parameters corresponding to the complex workpiece into a deposition manufacturing simulation model to perform simulation processing of additive deposition manufacturing, and then confirm the laser beam power parameters during actual deposition manufacturing based on the additive deposition manufacturing simulation results; then perform path planning processing, and finally control the laser additive manufacturing equipment to perform additive deposition manufacturing processing on the surface of the complex workpiece according to the planned path and laser beam power parameters; thereby realizing additive deposition manufacturing of heterogeneous materials on the surface of complex workpieces or precision parts; improving the accuracy of additive deposition manufacturing of heterogeneous materials, and reducing problems such as cracking due to thermal stress or other problems during the manufacturing process; thereby reducing the scrap rate of complex workpieces or precision parts in additive deposition manufacturing of heterogeneous materials, and reducing the cost of additive deposition manufacturing.

[0106] In addition, the above is a detailed introduction to a complex workpiece manufacturing method based on laser additive manufacturing and related devices provided in an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for manufacturing complex workpieces based on laser additive manufacturing, characterized in that: Applied to laser additive manufacturing equipment for additive deposition manufacturing of complex workpiece surfaces, the method includes: Obtaining a three-dimensional model of a work surface corresponding to a complex workpiece to be manufactured by additive deposition of heterogeneous materials, a base material melting point parameter, and deposition material parameters, wherein the deposition material parameters include a base deposition material composition, a particle diameter parameter, and a deposition material melting point parameter; Inputting the melting point parameter of the substrate and the deposition material parameter corresponding to the complex workpiece into a deposition manufacturing simulation model, and performing additive deposition manufacturing simulation processing according to different laser beam powers in the deposition manufacturing simulation model to obtain additive deposition manufacturing simulation results; confirming the laser beam power parameters and movement speed during actual deposition manufacturing based on the additive deposition manufacturing simulation results; Performing path planning processing for additive deposition manufacturing based on the three-dimensional model of the surface to be worked on and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters to obtain a planned path for additive deposition manufacturing; The laser additive manufacturing device is controlled to perform additive deposition manufacturing processing on the complex workpiece surface according to the planned path, the laser beam power parameters and the moving speed.

2. The method for manufacturing a complex workpiece according to claim 1, wherein: The method of obtaining a three-dimensional model of a work surface corresponding to a complex workpiece to be manufactured by additive deposition of heterogeneous materials, a substrate melting point parameter, and a deposition material parameter includes: The input interface of the laser additive manufacturing device receives the input of the three-dimensional model, substrate melting point parameters, and deposition material parameters corresponding to the complex workpiece to be manufactured by heterogeneous material additive deposition according to the permission information and prompts of the operating user; After receiving the three-dimensional model, the laser additive manufacturing device prompts the operating user to specify a corresponding surface to be worked on in the three-dimensional model, and obtains a three-dimensional model diagram of the surface to be worked on in the three-dimensional model based on the surface to be worked on specified by the operating user.

3. The method for manufacturing a complex workpiece according to claim 1, wherein: The method further comprises: performing a simulation process of additive deposition manufacturing according to different laser beam powers in the deposition manufacturing simulation model to obtain an additive deposition manufacturing simulation result, including: In the deposition manufacturing simulation model, a simulated powder feeding speed and a simulated powder feeding angle of the simulated powder feeding nozzle are set so that a size of a simulated powder spot formed by the simulated powder feeding nozzle during the simulated powder feeding is within a preset range, and a distance from the formed simulated powder spot to the simulated powder feeding nozzle is a first preset distance; The focal length of the simulated laser beam in the deposition manufacturing simulation model is adjusted on the simulated powder spot, and the additive deposition manufacturing simulation process is performed according to different laser beam powers and different moving speeds to obtain the additive deposition manufacturing simulation result.

4. The method for manufacturing a complex workpiece according to claim 1, wherein: The deposition manufacturing simulation model is constructed by calling a twin digital network in the simulation application software according to the equipment parameters of the laser additive manufacturing equipment.

5. The method for manufacturing a complex workpiece according to claim 1, wherein: The confirming of the laser beam power parameters during actual deposition manufacturing based on the additive deposition manufacturing simulation results includes: Obtaining simulated molten pool temperature data, simulated molten pool width data, and simulated molten pool thickness data corresponding to simulated molten pools formed at different laser beam powers and different moving speeds in the additive deposition manufacturing simulation results; The laser beam power parameters and moving speed during actual deposition manufacturing are confirmed based on the simulated molten pool temperature data, simulated molten pool width data and simulated molten pool thickness data corresponding to the simulated molten pool formed under different laser beam powers and different moving speeds.

6. The method for manufacturing a complex workpiece according to claim 1, wherein: The path planning process for additive deposition manufacturing is performed based on the three-dimensional model of the surface to be worked on and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters to obtain a planned path for additive deposition manufacturing, including: Determining a starting point for operation on the three-dimensional model of the surface to be operated, and obtaining simulated molten pool width data formed on the substrate surface under the laser beam power parameters; The path planning processing of additive deposition manufacturing is performed on the three-dimensional model diagram of the work surface according to the shortest path planning algorithm based on the work starting point, the simulated molten pool width data and the set overlap rate between two adjacent paths to obtain a planned path for additive deposition manufacturing.

7. The method for manufacturing a complex workpiece according to claim 1, wherein: The controlling the laser additive manufacturing device to perform the additive deposition manufacturing process on the complex workpiece surface according to the planned path, the laser beam power parameters, and the moving speed includes: configuring a powder feeding nozzle of the laser additive manufacturing device according to a simulated powder feeding speed and a simulated powder feeding angle set in the deposition manufacturing simulation model, and causing the powder feeding nozzle to form powder spots on the surface of the substrate when feeding powder; After the powder feeding nozzle is set, the focal length of the laser beam in the laser additive manufacturing device is configured according to the focal length of the simulated laser beam in the deposition manufacturing simulation model to form a configured laser additive manufacturing device; The configured laser additive operation equipment performs additive deposition manufacturing processing on the complex workpiece surface according to the planned path, the laser beam power parameters and the moving speed, with the distance between the powder feeding nozzle and the substrate surface maintained at a first preset distance.

8. A complex workpiece manufacturing device based on laser additive manufacturing, characterized in that: Applicable to laser additive manufacturing equipment for additive deposition manufacturing of complex workpiece surfaces, the device comprises: An acquisition module is used to obtain a three-dimensional model of a work surface corresponding to a complex workpiece to be manufactured by additive deposition of heterogeneous materials, a base material melting point parameter, and deposition material parameters, wherein the deposition material parameters include base deposition material composition, particle diameter parameter, and deposition material melting point parameter; A simulation processing module is configured to input the melting point parameters of the substrate and the deposition material parameters corresponding to the complex workpiece into a deposition manufacturing simulation model, and perform additive deposition manufacturing simulation processing according to different laser beam powers in the deposition manufacturing simulation model to obtain additive deposition manufacturing simulation results; Confirmation module: used for confirming the laser beam power parameters in actual deposition manufacturing based on the additive deposition manufacturing simulation results; A path planning module is configured to perform path planning processing for additive deposition manufacturing based on the three-dimensional model of the surface to be worked on and the simulated molten pool width data formed on the substrate surface under the laser beam power parameters, thereby obtaining a planned path for additive deposition manufacturing; Additive manufacturing control module: used to control the laser additive manufacturing equipment to perform additive deposition manufacturing processing on the surface of the complex workpiece according to the planned path and the laser beam power parameters.

9. An electronic device comprising a processor and a memory, characterized in that: The processor runs the computer program or code stored in the memory to implement the complex workpiece manufacturing method according to any one of claims 1 to 7.

10. A computer-readable storage medium for storing a computer program or code, characterized in that: When the computer program or code is executed by a processor, the complex workpiece manufacturing method according to any one of claims 1 to 7 is implemented.

Images