A powder feeding method, device, equipment and computer storage medium

Abstract

The embodiment of the present disclosure discloses a powder feeding method, device, equipment and computer storage medium. The powder feeding method comprises: obtaining a corresponding relationship between a powder feeding amount of a powder material, a rotation speed of a powder tray and a cross-sectional area of a powder laying groove in the powder tray in a process of laser additive manufacturing of a target part based on characteristics of the powder material of the target part; determining the powder feeding amount of each position in different positions of the target part according to structural features of the different positions; and obtaining the rotation speed and the cross-sectional area corresponding to each position in the process of laser additive manufacturing based on the powder feeding amount of each position according to the corresponding relationship.

Description

Technical Field

[0001] This disclosure relates to the field of laser additive manufacturing technology, and more particularly to a powder feeding method, apparatus, device, and computer storage medium. Background Technology

[0002] Laser additive manufacturing (LAM) is a technology that processes parts by digitally modeling and layer-by-layer deposition of powder materials. LAM not only significantly shortens the development cycle of parts and reduces powder material waste, but also directly processes structurally complex parts. Therefore, LAM is widely used in aerospace, automotive, and medical fields. Because LAM employs a discrete-deposition method—specifically, changing the alloy composition, process parameters, and filling path of the powder material during layer-by-layer deposition—LAM can produce parts with gradient physical and chemical properties in one or more dimensions (hereinafter referred to as "gradient parts"). The processing of gradient parts using LAM has attracted increasing attention.

[0003] The forming quality of gradient parts is related to the amount and accuracy of powder feeding during laser additive manufacturing. However, excessive powder feeding can affect the dimensional accuracy of the gradient parts, leading to larger errors in sampling and testing areas. Using a smaller powder feeding rate requires adjusting the powder feed rate by reducing the powder tray rotation speed. However, when the powder tray rotation speed decreases beyond a certain range, it affects the powder feeding accuracy, making it impossible to precisely control the alloy composition of the gradient parts during laser additive manufacturing. This results in uneven alloy composition and deterioration of some or all of the physical and chemical properties of the gradient parts. More seriously, it can cause defects such as cracks, deformation, and porosity, thus shortening the service life and reducing efficiency of the gradient parts, while increasing manufacturing costs. Summary of the Invention

[0004] In view of this, the present disclosure aims to provide a powder feeding method, apparatus, device, and computer storage medium; capable of adjusting the powder feeding amount in real time and ensuring powder feeding accuracy.

[0005] The technical solution of this disclosure embodiment is implemented as follows:

[0006] In a first aspect, embodiments of this disclosure provide a powder feeding method, the powder feeding method comprising:

[0007] Based on the characteristics of the powder material of the target part used for laser additive manufacturing, the corresponding relationship between the powder feeding amount of the powder material, the rotation speed of the powder tray, and the cross-sectional area of ​​the powder spreading groove in the powder tray is obtained during the laser additive manufacturing of the target part.

[0008] Based on the structural features of different locations in the target part, determine the powder feeding amount for each of the different locations;

[0009] Based on the powder feeding amount at each position, the rotational speed and cross-sectional area corresponding to each position in the laser additive manufacturing process are obtained according to the correspondence.

[0010] Optionally, in some examples, obtaining the correspondence between the powder feed rate of the target part and the rotational speed of the powder tray and the cross-sectional area of ​​the powder spreading groove in the powder tray during the laser additive manufacturing of the target part, based on the characteristics of the powder material used for laser additive manufacturing, includes:

[0011] Based on the properties of the powder material used for the target part in laser additive manufacturing, a first range of rotational speed and a second range of cross-sectional area are obtained;

[0012] Obtain the powder feeding amount corresponding to the rotational speed and the cross-sectional area selected from the first range of the rotational speed and the second range of the cross-sectional area, respectively;

[0013] Based on the selected rotational speed, cross-sectional area, and powder feeding amount, a correspondence between the powder feeding amount and the rotational speed and cross-sectional area is fitted.

[0014] Optionally, in some examples, the correspondence between the powder feeding rate, the rotational speed, and the cross-sectional area is obtained by fitting the following formula:

[0015] y = m1x1 + m2x2 + c

[0016] Where y represents the amount of powder material fed; x1 represents the rotational speed of the powder tray; and x2 represents the cross-sectional area of ​​the powder spreading groove in the powder tray. j = 1, 2; n represents the number of test data;

[0017] Optionally, in some examples, obtaining the rotational speed and cross-sectional area corresponding to each position in the laser additive manufacturing process based on the powder feeding amount at each position and according to the correspondence includes:

[0018] Based on the powder feeding amount at the i-th position, the rotational speeds of multiple candidates corresponding to the i-th position and the cross-sectional area of ​​each candidate rotational speed are obtained according to the correspondence; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part;

[0019] The candidate rotation speed that is the same as the rotation speed in the laser additive manufacturing process corresponding to the (i-1)th position is selected as the rotation speed in the laser additive manufacturing process corresponding to the i-th position; wherein, the laser additive manufacturing order at the i-th position is adjacent to the laser additive manufacturing order at the (i-1)th position, and the laser additive manufacturing order corresponding to the i-th position is after the laser additive manufacturing order corresponding to the (i-1)th position;

[0020] The cross-sectional area of ​​the candidate rotation speed corresponding to the candidate rotation speed in the laser additive manufacturing process corresponding to the i-th position is determined as the cross-sectional area in the laser additive manufacturing process corresponding to the i-th position.

[0021] Optionally, in some examples, obtaining the rotational speed and cross-sectional area corresponding to each position in the laser additive manufacturing process based on the powder feeding amount at each position and according to the correspondence includes:

[0022] Based on the powder feeding amount at the i-th position, multiple candidate rotation speeds corresponding to the i-th position in the laser additive manufacturing process and multiple candidate cross-sectional areas corresponding to the rotation speed of each candidate are obtained according to the correspondence; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part;

[0023] When the powder feed rate at the i-th position is less than the powder feed rate at the (i-1)-th position, a candidate cross-sectional area smaller than the cross-sectional area corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from the plurality of candidate cross-sectional areas as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process. The rotational speed corresponding to the candidate cross-sectional area selected as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process is determined as the rotational speed corresponding to the i-th position in the laser additive manufacturing process. Wherein, the laser additive manufacturing order at the i-th position is adjacent to the laser additive manufacturing order at the (i-1)-th position, and the laser additive manufacturing order corresponding to the i-th position is after the laser additive manufacturing order corresponding to the (i-1)-th position. Alternatively,

[0024] When the powder feeding amount at the i-th position is greater than the powder feeding amount at the (i-1)-th position, a candidate rotation speed that is greater than the rotation speed corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from the plurality of candidate rotation speeds as the rotation speed corresponding to the i-th position in the laser additive manufacturing process, and the cross-sectional area of ​​the candidate rotation speed corresponding to the selected candidate rotation speed in the laser additive manufacturing process is determined as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process.

[0025] Secondly, embodiments of this disclosure provide a powder feeding device, which includes a first obtaining unit, a determining unit, and a second obtaining unit; wherein...

[0026] The first obtaining unit is configured to: based on the characteristics of the powder material of the target part for laser additive manufacturing, obtain the correspondence between the powder feeding amount of the powder material, the rotation speed of the powder tray, and the cross-sectional area of ​​the powder spreading groove in the powder tray during the laser additive manufacturing of the target part;

[0027] The determining unit is configured to: determine the powder feeding amount at each of the different locations based on the structural features at different locations in the target part;

[0028] The second obtaining unit is configured to: based on the powder feeding amount at each position, obtain the rotational speed and cross-sectional area corresponding to each position in the laser additive manufacturing process according to the correspondence.

[0029] Optionally, in some examples, the first obtaining unit is configured as follows:

[0030] Based on the properties of the powder material used for the target part in laser additive manufacturing, a first range of rotational speed and a second range of cross-sectional area are obtained;

[0031] Obtain the powder feeding amount corresponding to the rotational speed and the cross-sectional area selected from the first range of the rotational speed and the second range of the cross-sectional area, respectively;

[0032] Based on the selected rotational speed, cross-sectional area, and powder feeding amount, a correspondence between the powder feeding amount and the rotational speed and cross-sectional area is fitted.

[0033] Optionally, in some examples, the first obtaining unit is configured as follows:

[0034] The relationship between the powder feeding rate, the rotation speed, and the cross-sectional area is obtained by fitting the following formula:

[0035] y = m1x1 + m2x2 + c

[0036] Where y represents the amount of powder material fed; x1 represents the rotational speed of the powder tray; and x2 represents the cross-sectional area of ​​the powder spreading groove in the powder tray. j = 1, 2; n represents the number of test data;

[0037] Optionally, in some examples, the second obtaining unit is configured as follows:

[0038] Based on the powder feeding amount at the i-th position, the rotational speeds of multiple candidates corresponding to the i-th position and the cross-sectional area of ​​each candidate rotational speed are obtained according to the correspondence; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part;

[0039] The candidate rotation speed that is the same as the rotation speed in the laser additive manufacturing process corresponding to the (i-1)th position is selected as the rotation speed in the laser additive manufacturing process corresponding to the i-th position; wherein, the laser additive manufacturing order at the i-th position is adjacent to the laser additive manufacturing order at the (i-1)th position, and the laser additive manufacturing order corresponding to the i-th position is after the laser additive manufacturing order corresponding to the (i-1)th position;

[0040] The cross-sectional area of ​​the candidate rotation speed corresponding to the candidate rotation speed in the laser additive manufacturing process corresponding to the i-th position is determined as the cross-sectional area in the laser additive manufacturing process corresponding to the i-th position.

[0041] Optionally, in some examples, the second obtaining unit is configured as follows:

[0042] Based on the powder feeding amount at the i-th position, multiple candidate rotation speeds corresponding to the i-th position in the laser additive manufacturing process and multiple candidate cross-sectional areas corresponding to the rotation speed of each candidate are obtained according to the correspondence; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part;

[0043] When the powder feed rate at the i-th position is less than the powder feed rate at the (i-1)-th position, a candidate cross-sectional area smaller than the cross-sectional area corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from the plurality of candidate cross-sectional areas as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process. The rotational speed corresponding to the candidate cross-sectional area selected as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process is determined as the rotational speed corresponding to the i-th position in the laser additive manufacturing process. Wherein, the laser additive manufacturing order at the i-th position is adjacent to the laser additive manufacturing order at the (i-1)-th position, and the laser additive manufacturing order corresponding to the i-th position is after the laser additive manufacturing order corresponding to the (i-1)-th position. Alternatively,

[0044] When the powder feeding amount at the i-th position is greater than the powder feeding amount at the (i-1)-th position, a candidate rotation speed that is greater than the rotation speed corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from the plurality of candidate rotation speeds as the rotation speed corresponding to the i-th position in the laser additive manufacturing process, and the cross-sectional area of ​​the candidate rotation speed corresponding to the selected candidate rotation speed in the laser additive manufacturing process is determined as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process.

[0045] Thirdly, embodiments of this disclosure provide a computing device, the computing device comprising: a processor and a memory; the processor being configured to execute instructions stored in the memory to implement the powder feeding method according to the first aspect.

[0046] Fourthly, embodiments of this disclosure provide a computer storage medium, characterized in that the computer storage medium stores at least one instruction, the at least one instruction being executed by a processor to implement the powder feeding method according to the first aspect.

[0047] Fifthly, embodiments of this disclosure provide a computer program product including computer instructions stored in a computer-readable storage medium; a processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the powder feeding method according to the first aspect.

[0048] This disclosure provides a powder feeding method, apparatus, device, and computer storage medium. It assesses the characteristics of the powder material used in laser additive manufacturing of target parts, and obtains the correspondence between the powder feeding amount, the rotational speed of the powder tray, and the cross-sectional area of ​​the powder spreading groove in the powder tray during the laser additive manufacturing process. Based on the structural features of different locations in the target part, the powder feeding amount for each location is determined. Then, based on the powder feeding amount for each location, the rotational speed of the powder tray and the cross-sectional area of ​​the powder spreading groove in the powder tray corresponding to each location during the laser additive manufacturing process are obtained according to the correspondence. The powder feeding method provided by this disclosure ensures both an appropriate powder feeding amount at each location during the laser additive manufacturing of target parts and guarantees powder feeding accuracy. Attached Figure Description

[0049] Figure 1 This is an exploded view of a powder feeding device used in laser additive manufacturing, which is part of the related technology.

[0050] Figure 2(a) is a schematic diagram of a powder tray.

[0051] Figure 2(b) is a schematic diagram of another type of powder tray.

[0052] Figure 3 This is a schematic flowchart of a powder feeding method provided in an embodiment of the present disclosure.

[0053] Figure 4 This is a schematic diagram of the composition of a powder feeding device provided in an embodiment of this disclosure.

[0054] Figure 5 A structural block diagram of a computing device provided in an embodiment of this disclosure. Detailed Implementation

[0055] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0056] See Figure 1 The diagram shows an exploded view of a powder feeding device 1 for laser additive manufacturing in the related art. The powder feeding device 1 specifically includes: a powder storage tank 101, a sealing cover 102, a tank cover 103, a powder spreading block 104, a powder suction block 105, a powder tray 106, a pipe joint 107, a powder suction joint 108, a rotating shaft 109, a drive motor 110, and a fixed plate 111.

[0057] The powder storage container 101 is used to store powder materials for laser additive manufacturing. The powder storage container 101 is connected to the sealing cover 102 by a thread.

[0058] In some examples, the powder material can be a metallic powder material or a non-metallic powder material.

[0059] A lid 103 is provided above the powder storage hopper 101, and the lid 103 is connected to the powder storage hopper 5 by a thread.

[0060] The powder spreading block 104 and the powder suction block 105 are both disposed between the sealing cover 102 and the powder tray 106, and the powder tray 106, powder spreading block 104, and powder suction block 105 are fitted together with the powder spreading groove 1061. A powder discharge port 1041 is provided on the powder spreading block 104, and a powder suction port 1051 is provided on the powder suction block 105. It is understood that the powder discharge port 1041 is aligned with the opening (not shown in the figure) of the powder storage tank 101, so that the powder material in the powder storage tank 101 can fall into the powder tray 106 through the powder discharge port 1041 under its own gravity.

[0061] The aforementioned pipe fitting 107 and sealing cap 102 are connected to the powder suction connector 108 via threads. Understandably, the pipe fitting 107 is mainly used to connect the air inlet pipe (not shown in the figure) and the air outlet pipe (not shown in the figure).

[0062] Below the powder tray 106, a rotating shaft 109 and a drive motor 110 are provided. The drive motor 110 drives the rotating shaft 109 to rotate clockwise, thereby causing the powder tray 106 to rotate. The rotation of the powder tray 106 then carries the powder material from the powder outlet 1041 of the powder spreading block 104 to the powder suction outlet 1051 of the powder suction block 105. In some examples, the rotating shaft 109 is connected to the powder tray 106 by screws.

[0063] The aforementioned fixed plate 111 and sealing cover 102 are connected by screws. A sealed chamber is formed between the fixed plate 111 and the sealing cover 102 to ensure that the gas in the chamber can only flow in a predetermined direction. In some examples, the fixed plate 111 is used to support the powder feeding device 1.

[0064] During the powder delivery process, the powder material in the powder storage bin 101 falls through the powder dropper 1041 on the powder spreading block 104 into the powder spreading groove 1061 of the powder tray 106, and the powder material falling into the powder tray 106 via the powder spreading block 104 is in a predetermined shape. The powder tray 106 rotates clockwise under the drive of the drive motor 110, conveying the powder material to the negative pressure zone of the powder suction block 105. It can be understood that the powder suction block 105 is fitted with the powder tray 106 through a gap, and the powder suction block 105 can slide along the powder spreading groove 1061 on the powder tray 106. When gas flows through the powder suction port 1051 on the powder suction block 105, a negative pressure zone is formed at the powder suction port 1051, so that the powder material in the negative pressure zone can be sucked away.

[0065] In laser additive manufacturing, the powder feed rate typically needs to be adjusted based on the structural characteristics of the part to be manufactured. On one hand, the powder feed rate can be adjusted by changing the rotation speed of the powder tray 106 during laser additive manufacturing. However, this may affect the service life of the powder tray 106 and the powder spreading block 104. On the other hand, the powder feed rate can also be controlled by controlling the cross-sectional area or width of the powder spreading groove 1061 in the powder tray 106. In some examples, the powder feed rate is controlled by replacing the powder tray 106 according to the required powder feed rate. For example, when the required powder feed rate is low, the cross-sectional area or width of the powder spreading groove 1061 in the powder tray 106 is obtained based on the required powder feed rate. Thus, for example, the powder tray 106 with a wider powder spreading groove 1061 shown in Figure 2(a) is replaced with the powder tray 106 with a narrower powder spreading groove 1061 shown in Figure 2(b). In another example, without replacing the powder tray 106, when the width or cross-sectional area of ​​the powder spreading groove 1061 in the powder tray 106 can be adjusted, the required powder feeding amount can be obtained by adjusting the width or cross-sectional area of ​​the powder spreading groove 1061 in the powder tray 106 in real time during the specific implementation process.

[0066] Based on the above description, the embodiments of this disclosure aim to provide a powder feeding method for laser additive manufacturing, which can adjust the powder feeding amount in real time and improve the powder feeding accuracy. See also Figure 3 The present disclosure illustrates a powder feeding method provided by an embodiment of the present disclosure, which specifically includes the following steps.

[0067] In step S301, based on the characteristics of the powder material of the target part used for laser additive manufacturing, the corresponding relationship between the powder feeding amount of the powder material, the rotation speed of the powder tray, and the cross-sectional area of ​​the powder spreading groove in the powder tray is obtained during the laser additive manufacturing of the target part.

[0068] In some examples, the characteristics of the powder material corresponding to the target part mentioned above include the material composition, particle size, sphericity, and flowability of the powder material.

[0069] In some examples, the aforementioned correspondence refers to the dependency between the powder feeding rate, the rotational speed of the powder tray, and the cross-sectional area of ​​the powder spreading groove in the powder tray. This dependency can be expressed as a function or in other forms. The aforementioned correspondence can be obtained through experimentation or simulation, and this disclosure does not specifically limit the method used.

[0070] In step S302, the powder feeding amount at each of the different positions is determined based on the structural features of the target part.

[0071] In some examples, the different locations in the target part described above include the layers of the target part after it has been decomposed, such as the initial layer, intermediate layers, and surface layers. The initial layer refers to the first few layers directly constructed on the substrate, providing the structural foundation for the target part. The intermediate layer is located between the initial layer and the surface layer, typically occupying most of the volume of the target part. The surface layer refers to the last few layers of the target part after laser additive manufacturing. Of course, the different locations also include the contours within the target part, the filled areas within the contours, and the cavities within the target part. Furthermore, the different locations also include the support structures during the laser additive manufacturing process. In some examples, if the target part is divided into multiple components and laser additively manufactured separately, then the connecting portions of these multiple components belong to the different locations described above in this disclosure embodiment.

[0072] To ensure that the appropriate amount of powder material is obtained at different locations within the target part, the appropriate powder feed rate for each location needs to be determined based on the structural characteristics of those locations. In some examples, when laser additive manufacturing gradient parts, the powder feed rate varies at different layer heights for different proportions of powder material. Therefore, the powder feed rate needs to be adjusted in real time according to the actual structure of the layer heights. In laser additive manufacturing, where geometric accuracy requirements are not high, the powder feed rate needs to be increased in real time to improve forming efficiency. Conversely, for locations with intricate structural features requiring higher geometric accuracy, the powder feed rate needs to be reduced. In some examples, sensors can be used to monitor the layer spacing of the gradient part during laser additive manufacturing. When the layer spacing exceeds a set range (i.e., negative defocus occurs), the powder feed rate needs to be reduced to keep the layer spacing within the set range. In another example, during the implementation process, visual sensors or algorithms can be used to automatically identify structural locations with low powder feeding, such as tilt features, cantilever features, and sharp corner features in the target part, where heat is prone to accumulate or the structure is prone to collapse, so as to automatically reduce the powder feeding during the laser additive manufacturing process.

[0073] In step S303, based on the powder feeding amount at each of the above positions, the rotational speed and cross-sectional area corresponding to each of the above positions in the laser additive manufacturing process are obtained according to the above correspondence.

[0074] Using the above correspondence, the corresponding rotation speed of the powder tray and the cross-sectional area of ​​the powder spreading groove in the powder tray can be obtained according to the powder feeding amount at each position in the laser additive manufacturing process. The powder feeding amount at each position can be obtained by adjusting the rotation speed of the powder tray and the cross-sectional area of ​​the powder spreading groove in the powder tray.

[0075] for Figure 3 The technical solution shown describes a method for determining the characteristics of powder materials used in laser additive manufacturing of target parts. This method establishes a correlation between the powder feed rate, the rotational speed of the powder tray, and the cross-sectional area of ​​the powder spreading groove in the powder tray during the laser additive manufacturing process. Based on the structural features of different locations within the target part, the powder feed rate for each location is determined. Then, based on the powder feed rate for each location, the rotational speed of the powder tray and the cross-sectional area of ​​the powder spreading groove in the powder tray corresponding to each location during the laser additive manufacturing process are obtained according to the correlation. The powder feeding method provided by this embodiment ensures both an appropriate powder feed rate at each location during the laser additive manufacturing of the target part and guarantees powder feeding accuracy.

[0076] for Figure 3 In some possible implementations of the technical solution shown, the above-described relationship between the powder feed rate of the target part and the rotational speed of the powder tray and the cross-sectional area of ​​the powder spreading groove in the powder tray during the laser additive manufacturing process of the target part, based on the characteristics of the powder material used for laser additive manufacturing, includes:

[0077] Based on the properties of the powder material used for the target part in laser additive manufacturing, a first range of rotational speed and a second range of cross-sectional area are obtained.

[0078] The powder feeding amount corresponding to the rotational speed and the cross-sectional area selected from the first range of the rotational speed and the second range of the cross-sectional area is obtained respectively;

[0079] Based on the selected rotation speed, cross-sectional area, and powder feeding rate, a correlation between the powder feeding rate, rotation speed, and cross-sectional area is obtained.

[0080] After determining the properties of the powder material, experiments were conducted to obtain the powder feeding rate and accuracy at different powder tray rotation speeds, and the powder feeding rate and accuracy at different cross-sectional areas of the powder spreading groove in the powder tray. In some examples, with the powder spreading groove width of 13 mm and depth of 1 mm, the powder tray rotation speed ranged from 6° / s to 15° / s. In specific implementations, the powder tray rotation speed was varied sequentially from 6° / s, 8° / s, 10° / s, 12° / s, and 14° / s. Therefore, it can be determined that when the cross-sectional area of ​​the powder spreading groove is 13 mm... 2 The powder feeding rate corresponds to the rotation speed of the powder tray at 6° / s, 8° / s, 10° / s, 12° / s, and 14° / s. The cross-sectional area of ​​the powder spreading trough is set to 11 mm². 2 The powder feeding rate was determined when the powder tray rotation speed was 6° / s, 8° / s, 10° / s, 12° / s, and 14° / s, respectively. By analogy, the cross-sectional area of ​​the powder spreading trough with a diameter of 1 mm² was obtained.2 The powder feeding rate was calculated when the powder tray rotation speed was 6° / s, 8° / s, 10° / s, 12° / s, and 14° / s. The specific results are shown in Table 1.

[0081]

[0082] Table 1

[0083] Based on the rotational speed shown in Table 1, the cross-sectional area, and powder feeding rate, curve fitting can be performed to obtain the corresponding relationship between the powder feeding rate, the rotational speed of the powder tray, and the cross-sectional area of ​​the powder spreading trough. It should be noted that the cross-sectional area of ​​the powder spreading trough is 1 mm². 2 Up to 13mm 2 The powder feeding accuracy can be achieved even when the powder tray rotation speed is between 6° / s and 15° / s.

[0084] In some examples of the above-described implementation methods, the correspondence between the powder feeding rate, the rotation speed, and the cross-sectional area is obtained by fitting the following formula:

[0085] y = m1x1 + m2x2 + c

[0086] Where y represents the amount of powder fed into the powder material; x1 represents the rotational speed of the powder tray; and x2 represents the cross-sectional area of ​​the powder spreading groove in the powder tray. j = 1, 2; n represents the number of test data;

[0087] The relationship between the powder feeding rate, the powder tray rotation speed, and the powder spreading trough can be obtained from the rotation speed shown in Table 1, the cross-sectional area, and the powder feeding rate as y = m1x1 + m2x2 + c; where y represents the powder feeding rate of the powder material; x1 represents the rotation speed of the powder tray; and x2 represents the cross-sectional area of ​​the powder spreading trough in the powder tray. j = 1, 2; n represents the number of test data;

[0088] Understandably, the curve fitting process described above involves solving for the slopes m1 and m2, as well as the intercept c, to minimize the error between the fitted curve and the test data. In some examples, the least squares method is used to fit the test data, ultimately yielding... Therefore, the linear relationship between the powder feeding rate, the rotation speed of the powder tray, and the cross-sectional area of ​​the powder spreading trough can be calculated using the least squares method.

[0089] for Figure 3In some possible implementations of the technical solution shown, the above-mentioned rotational speed and cross-sectional area in the laser additive manufacturing process corresponding to each position are obtained based on the powder feeding amount at each position and according to the above-mentioned correspondence, including:

[0090] Based on the powder feeding amount at the i-th position, the rotational speeds of multiple candidates corresponding to the i-th position and the cross-sectional area of ​​each candidate rotational speed are obtained according to the above correspondence; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part.

[0091] The candidate rotation speed that is the same as the rotation speed in the laser additive manufacturing process corresponding to the (i-1)th position is selected as the rotation speed in the laser additive manufacturing process corresponding to the i-th position; wherein, the laser additive manufacturing order at the i-th position is adjacent to the laser additive manufacturing order at the (i-1)th position, and the laser additive manufacturing order corresponding to the i-th position is after the laser additive manufacturing order corresponding to the (i-1)th position;

[0092] The cross-sectional area of ​​the candidate corresponding to the rotational speed of the candidate in the laser additive manufacturing process corresponding to the i-th position is determined as the cross-sectional area in the laser additive manufacturing process corresponding to the i-th position.

[0093] In the laser additive manufacturing process, the powder feed rate at the i-th position can be obtained by considering multiple candidate rotation speeds and the corresponding cross-sectional areas of each candidate rotation speed. For example, as shown in Table 1, when the powder feed rate is 11 g / min, the corresponding rotation speed of the powder tray is 6° / s and the cross-sectional area of ​​the powder spreading groove in the powder tray is 6 mm. 2 Or, the corresponding powder tray rotation speed is 8° / s and the cross-sectional area of ​​the powder spreading groove in the powder tray is 9mm. 2 Therefore, in the actual implementation process, the appropriate rotation speed of the powder tray and the cross-sectional area of ​​the powder spreading trough can be selected according to the actual powder feeding situation to obtain the required powder feeding amount.

[0094] Specifically, when selecting a candidate rotational speed from multiple candidate rotational speeds corresponding to the i-th position that is the same as the rotational speed used in the laser additive manufacturing process corresponding to the (i-1)-th position, the corresponding cross-sectional area is determined based on the selected candidate rotational speed as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process. In other words, in this embodiment, the rotational speed of the powder tray can be left unchanged, with the aim of obtaining the required powder feeding amount by changing the cross-sectional area of ​​the powder spreading groove in the powder tray. This is mainly because adjusting the rotational speed of the powder tray affects the service life of the powder tray and the powder spreading block.

[0095] for Figure 3 In some possible implementations of the technical solution shown, the above-mentioned rotational speed and cross-sectional area in the laser additive manufacturing process corresponding to each position are obtained based on the powder feeding amount at each position and according to the above-mentioned correspondence, including:

[0096] Based on the powder feeding amount at the i-th position, according to the above correspondence, multiple candidate rotation speeds corresponding to the i-th position in the laser additive manufacturing process and multiple candidate cross-sectional areas corresponding to the rotation speeds of each candidate are obtained; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part.

[0097] When the powder feed amount at the i-th position is less than the powder feed amount at the (i-1)-th position, a cross-sectional area smaller than the cross-sectional area corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from the plurality of candidate cross-sectional areas as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process. The rotational speed of the candidate corresponding to the cross-sectional area of ​​the selected candidate for the i-th position in the laser additive manufacturing process is determined as the rotational speed corresponding to the i-th position in the laser additive manufacturing process. The laser additive manufacturing sequence at the i-th position is adjacent to the laser additive manufacturing sequence at the (i-1)-th position, and the laser additive manufacturing sequence corresponding to the i-th position is after the laser additive manufacturing sequence corresponding to the (i-1)-th position. Alternatively,

[0098] When the powder feeding amount at the i-th position is greater than the powder feeding amount at the (i-1)-th position, the rotational speed of the candidate rotational speed that is greater than the rotational speed in the laser additive manufacturing process corresponding to the (i-1)-th position is selected as the rotational speed in the laser additive manufacturing process corresponding to the i-th position, and the cross-sectional area of ​​the candidate rotational speed corresponding to the selected rotational speed in the laser additive manufacturing process is determined as the cross-sectional area in the laser additive manufacturing process corresponding to the i-th position.

[0099] Specifically, when the powder feed rate at the i-th position decreases, adjusting the powder feed rate at each position by changing the cross-sectional area of ​​the powder spreading groove in the powder tray can avoid reducing the rotation speed of the powder tray, thus ensuring the powder feed accuracy in the laser additive manufacturing process. On the other hand, when the powder feed rate at the i-th position increases, adjusting the powder feed rate at each position by increasing the rotation speed of the powder tray can also improve the powder feed accuracy in the laser additive manufacturing process.

[0100] In some examples, when the powder feed amount at position i is smaller than that at position i-1, a candidate cross-sectional area smaller than the cross-sectional area corresponding to position i-1 in the laser additive manufacturing process is selected from multiple candidate cross-sectional areas as the cross-sectional area corresponding to position i in the laser additive manufacturing process. A candidate rotational speed corresponding to the selected candidate cross-sectional area corresponding to position i in the laser additive manufacturing process is then determined as the rotational speed corresponding to position i in the laser additive manufacturing process. In other words, when the powder feed amount at position i is smaller than that at position i-1, in this embodiment of the disclosure, it is desirable to obtain the required powder feed amount by reducing the cross-sectional area of ​​the powder spreading groove in the powder tray, so as not to affect the powder feed accuracy.

[0101] In other examples, when the powder feed amount at the i-th position increases relative to the powder feed amount at the (i-1)-th position, a candidate rotational speed greater than the rotational speed corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from multiple candidate rotational speeds as the rotational speed corresponding to the i-th position in the laser additive manufacturing process. The cross-sectional area corresponding to the selected candidate rotational speed corresponding to the i-th position in the laser additive manufacturing process is then determined as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process. In other words, when the powder feed amount at the i-th position increases relative to the powder feed amount at the (i-1)-th position, this embodiment of the disclosure aims to improve powder feed accuracy by increasing the rotational speed of the powder tray to obtain the required powder feed amount.

[0102] Based on the above description, in this embodiment, if adjusting either the rotation speed of the powder tray or the cross-sectional area of ​​the powder spreading trough can achieve the required powder delivery rate, the adjustment method with the highest powder delivery accuracy is preferred. When the powder delivery accuracy is the same, the adjustment method with the lowest powder tray rotation speed is preferred to reduce the impact on the service life of the powder spreading blocks in the powder delivery equipment. In some examples, when adjusting the rotation speed of the powder tray cannot achieve the required powder delivery rate, adjusting the cross-sectional area of ​​the powder spreading trough is chosen.

[0103] Understandably, in the embodiments of this disclosure, the minimum powder feeding amount for the aforementioned powder feeding range can be determined based on actual conditions. Specifically, when the powder tray rotation speed is at its minimum, the cross-sectional area of ​​the powder spreading trough is changed. When the cross-sectional area of ​​the powder spreading trough is reduced to the point where the powder feeding accuracy does not meet the set requirements, the minimum powder feeding amount corresponding to the aforementioned powder material is obtained. The maximum powder feeding amount corresponding to the aforementioned powder material is related to the maximum cross-sectional area of ​​the powder spreading trough and the maximum rotation speed of the powder tray. When the cross-sectional area of ​​the powder spreading trough is at its maximum and the rotation speed of the powder tray is at its maximum, the powder feeding amount reaches its maximum.

[0104] Based on the same inventive concept as the aforementioned technical solution, see [link to inventive concept]. Figure 4 The illustration shows a powder feeding device 40 provided in an embodiment of the present disclosure. The powder feeding device 40 specifically includes: a first obtaining unit 401, a determining unit 402, and a second obtaining unit 403; wherein,

[0105] The first obtaining unit 401 is configured to: based on the characteristics of the powder material of the target part used for laser additive manufacturing, obtain the correspondence between the amount of powder material fed into the powder tray, the rotation speed of the powder tray, and the cross-sectional area of ​​the powder spreading groove in the powder tray during the laser additive manufacturing of the target part.

[0106] The aforementioned determining unit 402 is configured to: determine the powder feeding amount at each of the different locations based on the structural features of the target part at different locations;

[0107] The second obtaining unit 403 is configured to obtain, based on the powder feeding amount at each of the above positions and according to the above correspondence, the rotational speed and the cross-sectional area corresponding to each of the above positions in the laser additive manufacturing process.

[0108] Optionally, in some examples, the first obtaining unit 401 described above is configured as follows:

[0109] Based on the properties of the powder material used for the target part in laser additive manufacturing, a first range of rotational speed and a second range of the aforementioned cross-sectional area are obtained;

[0110] The powder feeding amount corresponding to the rotational speed and the cross-sectional area selected from the first range of the rotational speed and the second range of the cross-sectional area is obtained respectively;

[0111] Based on the selected rotation speed, cross-sectional area, and powder feeding rate, a correlation between the powder feeding rate, rotation speed, and cross-sectional area is obtained.

[0112] Optionally, in some examples, the first obtaining unit 401 described above is configured as follows:

[0113] The correspondence between the above powder feeding rate, the above rotation speed, and the above cross-sectional area is obtained by fitting the following formula:

[0114] y = m1x1 + m2x2 + c

[0115] Where y represents the amount of powder fed into the powder material; x1 represents the rotational speed of the powder tray; and x2 represents the cross-sectional area of ​​the powder spreading groove in the powder tray. j = 1, 2; n represents the number of test data;

[0116] Optionally, in some examples, the second obtaining unit 403 described above is configured as follows:

[0117] Based on the powder feeding amount at the i-th position, the rotational speeds of multiple candidates corresponding to the i-th position and the cross-sectional area of ​​each candidate rotational speed are obtained according to the above correspondence; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part.

[0118] The candidate rotation speed that is the same as the rotation speed in the laser additive manufacturing process corresponding to the (i-1)th position is selected as the rotation speed in the laser additive manufacturing process corresponding to the i-th position; wherein, the laser additive manufacturing order at the i-th position is adjacent to the laser additive manufacturing order at the (i-1)th position, and the laser additive manufacturing order corresponding to the i-th position is after the laser additive manufacturing order corresponding to the (i-1)th position;

[0119] The cross-sectional area of ​​the candidate corresponding to the rotational speed of the candidate in the laser additive manufacturing process corresponding to the i-th position is determined as the cross-sectional area in the laser additive manufacturing process corresponding to the i-th position.

[0120] Optionally, in some examples, the second obtaining unit 403 described above is configured as follows:

[0121] Based on the powder feeding amount at the i-th position, according to the above correspondence, multiple candidate rotation speeds corresponding to the i-th position in the laser additive manufacturing process and multiple candidate cross-sectional areas corresponding to the rotation speeds of each candidate are obtained; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part.

[0122] When the powder feed amount at the i-th position is less than the powder feed amount at the (i-1)-th position, a cross-sectional area smaller than the cross-sectional area corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from the plurality of candidate cross-sectional areas as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process. The rotational speed of the candidate corresponding to the cross-sectional area of ​​the selected candidate for the i-th position in the laser additive manufacturing process is determined as the rotational speed corresponding to the i-th position in the laser additive manufacturing process. The laser additive manufacturing sequence at the i-th position is adjacent to the laser additive manufacturing sequence at the (i-1)-th position, and the laser additive manufacturing sequence corresponding to the i-th position is after the laser additive manufacturing sequence corresponding to the (i-1)-th position. Alternatively,

[0123] When the powder feeding amount at the i-th position is greater than the powder feeding amount at the (i-1)-th position, the rotational speed of the candidate rotational speed that is greater than the rotational speed in the laser additive manufacturing process corresponding to the (i-1)-th position is selected as the rotational speed in the laser additive manufacturing process corresponding to the i-th position, and the cross-sectional area of ​​the candidate rotational speed corresponding to the selected rotational speed in the laser additive manufacturing process is determined as the cross-sectional area in the laser additive manufacturing process corresponding to the i-th position.

[0124] Please refer to Figure 5 This diagram illustrates a structural block diagram of an electronic device provided in an exemplary embodiment of this application. The electronic device in this application may include one or more components such as a processor 510 and a memory 520.

[0125] Optionally, the processor 510 connects various parts within the electronic device using various interfaces and lines, and performs various functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory 520, and by calling data stored in the memory 520. Optionally, the processor 510 can be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 1310 can integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), Neural-network Processing Unit (NPU), and baseband chip. Among them, the CPU mainly handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content required to be displayed on the touch screen; the NPU is used to implement artificial intelligence (AI) functions; and the baseband chip is used to handle wireless communication. It is understandable that the aforementioned baseband chip may not be integrated into the processor 510, but may be implemented using a separate chip.

[0126] The memory 520 may include random access memory (RAM) or read-only memory (ROM). Optionally, the memory 520 may include a non-transitory computer-readable storage medium. The memory 520 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 1320 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the various method embodiments described below, etc.; the data storage area may store data created according to the use of the electronic device, etc.

[0127] In addition, those skilled in the art will understand that the structure of the electronic device shown in the above figures does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, the terminal may also include a display screen, camera assembly, microphone, speaker, radio frequency circuit, input unit, sensors (such as accelerometer, angular velocity sensor, light sensor, etc.), audio circuit, WiFi module, power supply, Bluetooth module, etc., which will not be described in detail here.

[0128] This disclosure also provides a computer-readable storage medium storing at least one instruction, which is executed by a processor to implement the powder feeding method described above according to the foregoing embodiments.

[0129] This disclosure also provides a computer program product including computer instructions stored in a computer-readable storage medium; a processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the powder feeding method provided in various alternative implementations of the above aspects.

[0130] Those skilled in the art will recognize that the functions described in the embodiments of this disclosure in one or more of the foregoing examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0131] It should be noted that the technical solutions described in the embodiments of this disclosure can be combined arbitrarily without conflict.

[0132] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A powder delivery method, characterized in that, The powder delivery method includes: Based on the characteristics of the powder material of the target part used for laser additive manufacturing, the corresponding relationship between the powder feeding amount of the powder material, the rotation speed of the powder tray, and the cross-sectional area of ​​the powder spreading groove in the powder tray is obtained during the laser additive manufacturing of the target part. Based on the structural features of different locations in the target part, determine the powder feeding amount for each of the different locations; Based on the powder feed amount at each location, the rotational speed and cross-sectional area corresponding to each location in the laser additive manufacturing process are obtained according to the correspondence. The method, based on the characteristics of the powder material used in laser additive manufacturing of the target part, obtains the corresponding relationship between the powder feeding amount, the rotational speed of the powder tray, and the cross-sectional area of ​​the powder spreading groove in the powder tray during the laser additive manufacturing of the target part, including: Based on the properties of the powder material used for the target part in laser additive manufacturing, a first range of rotational speed and a second range of cross-sectional area are obtained; Obtain the powder feeding amount corresponding to the rotational speed and the cross-sectional area selected from the first range of the rotational speed and the second range of the cross-sectional area, respectively; Based on the selected rotational speed, cross-sectional area, and powder feeding amount, a correspondence between the powder feeding amount and the rotational speed and cross-sectional area is fitted.

2. The powder feeding method according to claim 1, characterized in that, The relationship between the powder feeding rate, the rotation speed, and the cross-sectional area is obtained by fitting the following formula: y = m1x1 + m2x2 + c Where y represents the amount of powder material fed; x1 represents the rotational speed of the powder tray; and x2 represents the cross-sectional area of ​​the powder spreading groove in the powder tray. n represents the number of test data; 3. The powder feeding method according to claim 1, characterized in that, The process of obtaining the rotational speed and cross-sectional area corresponding to each position in the laser additive manufacturing process based on the powder feeding amount at each position and the corresponding relationship includes: Based on the powder feeding amount at the i-th position, the rotational speeds of multiple candidates corresponding to the i-th position and the cross-sectional area of ​​each candidate rotational speed are obtained according to the correspondence; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part; The candidate rotation speed that is the same as the rotation speed in the laser additive manufacturing process corresponding to the (i-1)th position is selected as the rotation speed in the laser additive manufacturing process corresponding to the i-th position; wherein, the laser additive manufacturing order at the i-th position is adjacent to the laser additive manufacturing order at the (i-1)th position, and the laser additive manufacturing order corresponding to the i-th position is after the laser additive manufacturing order corresponding to the (i-1)th position; The cross-sectional area of ​​the candidate rotation speed corresponding to the candidate rotation speed in the laser additive manufacturing process corresponding to the i-th position is determined as the cross-sectional area in the laser additive manufacturing process corresponding to the i-th position.

4. The powder feeding method according to claim 1, characterized in that, The process of obtaining the rotational speed and cross-sectional area corresponding to each position in the laser additive manufacturing process based on the powder feeding amount at each position and the corresponding relationship includes: Based on the powder feeding amount at the i-th position, multiple candidate rotation speeds corresponding to the i-th position in the laser additive manufacturing process and multiple candidate cross-sectional areas corresponding to the rotation speed of each candidate are obtained according to the correspondence; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part; When the powder feed rate at the i-th position is less than the powder feed rate at the (i-1)-th position, a candidate cross-sectional area smaller than the cross-sectional area corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from the plurality of candidate cross-sectional areas as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process. The rotational speed corresponding to the candidate cross-sectional area selected as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process is determined as the rotational speed corresponding to the i-th position in the laser additive manufacturing process. Wherein, the laser additive manufacturing order at the i-th position is adjacent to the laser additive manufacturing order at the (i-1)-th position, and the laser additive manufacturing order corresponding to the i-th position is after the laser additive manufacturing order corresponding to the (i-1)-th position. Alternatively, When the powder feeding amount at the i-th position is greater than the powder feeding amount at the (i-1)-th position, a candidate rotation speed that is greater than the rotation speed corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from the plurality of candidate rotation speeds as the rotation speed corresponding to the i-th position in the laser additive manufacturing process, and the cross-sectional area of ​​the candidate rotation speed corresponding to the selected candidate rotation speed in the laser additive manufacturing process is determined as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process.

5. A powder feeding device, characterized in that, The powder feeding device includes a first obtaining unit, a determining unit, and a second obtaining unit; wherein... The first obtaining unit is configured to: based on the characteristics of the powder material of the target part for laser additive manufacturing, obtain the correspondence between the powder feeding amount of the powder material, the rotation speed of the powder tray, and the cross-sectional area of ​​the powder spreading groove in the powder tray during the laser additive manufacturing of the target part; The determining unit is configured to: determine the powder feeding amount at each of the different locations based on the structural features at different locations in the target part; The second obtaining unit is configured to: based on the powder feeding amount at each position, and according to the correspondence, obtain the rotational speed and cross-sectional area corresponding to each position in the laser additive manufacturing process. The first obtaining unit is configured as follows: Based on the properties of the powder material used for the target part in laser additive manufacturing, a first range of rotational speed and a second range of cross-sectional area are obtained; Obtain the powder feeding amount corresponding to the rotational speed and the cross-sectional area selected from the first range of the rotational speed and the second range of the cross-sectional area, respectively; Based on the selected rotational speed, cross-sectional area, and powder feeding amount, a correspondence between the powder feeding amount and the rotational speed and cross-sectional area is fitted.

6. The powder feeding device according to claim 5, characterized in that, The second obtaining unit is configured as follows: Based on the powder feeding amount at the i-th position, the rotational speeds of multiple candidates corresponding to the i-th position and the cross-sectional area of ​​each candidate rotational speed are obtained according to the correspondence; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part; The candidate rotation speed that is the same as the rotation speed in the laser additive manufacturing process corresponding to the (i-1)th position is selected as the rotation speed in the laser additive manufacturing process corresponding to the i-th position; wherein, the laser additive manufacturing order at the i-th position is adjacent to the laser additive manufacturing order at the (i-1)th position, and the laser additive manufacturing order corresponding to the i-th position is after the laser additive manufacturing order corresponding to the (i-1)th position; The cross-sectional area of ​​the candidate rotation speed corresponding to the candidate rotation speed in the laser additive manufacturing process corresponding to the i-th position is determined as the cross-sectional area in the laser additive manufacturing process corresponding to the i-th position.

7. The powder feeding device according to claim 5, characterized in that, The second obtaining unit is configured as follows: Based on the powder feeding amount at the i-th position, multiple candidate rotation speeds corresponding to the i-th position in the laser additive manufacturing process and multiple candidate cross-sectional areas corresponding to the rotation speed of each candidate are obtained according to the correspondence; where i represents different positions in the target part, i = 1, 2, ..., N, and N represents the number of different positions in the target part; When the powder feed rate at the i-th position is less than the powder feed rate at the (i-1)-th position, a candidate cross-sectional area smaller than the cross-sectional area corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from the plurality of candidate cross-sectional areas as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process. The rotational speed corresponding to the candidate cross-sectional area selected as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process is determined as the rotational speed corresponding to the i-th position in the laser additive manufacturing process. Wherein, the laser additive manufacturing order at the i-th position is adjacent to the laser additive manufacturing order at the (i-1)-th position, and the laser additive manufacturing order corresponding to the i-th position is after the laser additive manufacturing order corresponding to the (i-1)-th position. Alternatively, When the powder feeding amount at the i-th position is greater than the powder feeding amount at the (i-1)-th position, a candidate rotation speed that is greater than the rotation speed corresponding to the (i-1)-th position in the laser additive manufacturing process is selected from the plurality of candidate rotation speeds as the rotation speed corresponding to the i-th position in the laser additive manufacturing process, and the cross-sectional area of ​​the candidate rotation speed corresponding to the selected candidate rotation speed in the laser additive manufacturing process is determined as the cross-sectional area corresponding to the i-th position in the laser additive manufacturing process.

8. A computing device, characterized in that, The computing device includes a processor and a memory; the processor is used to execute instructions stored in the memory to implement the powder feeding method according to any one of claims 1 to 4.

9. A computer storage medium, characterized in that, The computer storage medium stores at least one instruction, which is executed by a processor to implement the powder feeding method according to any one of claims 1 to 4.

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