A method of forming a part

Abstract

This application discloses a method for forming a part, the method comprising: obtaining a first digital model and a first filling molding parameter based on a target part; obtaining a first part sample based on the first digital model and the first filling molding parameter; obtaining a density value and elongation of the first part sample based on the first part sample; if both the density value and elongation of the first part sample meet a preset threshold, then using the filling molding parameter corresponding to the first part sample as a second filling molding parameter; obtaining a second part sample based on the first digital model and the first printing molding parameter; obtaining a surface roughness value of the second part sample based on the second part sample; if the surface roughness value of the second part sample meets a preset threshold, then using the printing molding parameter corresponding to the second part sample as a second printing molding parameter; and obtaining a target part based on the second filling molding parameter and the second printing molding parameter.

Description

Technical Field

[0001] This application relates to the field of additive manufacturing technology, and more particularly to a method for forming a part. Background Technology

[0002] Selective laser melting forming technology is an additive manufacturing process based on laser powder bed. It features high processing accuracy, high flexibility, and good economy, and is widely used in the manufacture of complex and confidential aerospace structural components.

[0003] With the rapid growth of application demands, how to accurately and quickly obtain the molding parameters of the required parts is an urgent problem to be solved. Summary of the Invention

[0004] The main objective of this application is to provide a method for forming parts, which aims to solve the technical problem that existing technologies cannot accurately and quickly obtain the forming parameters of the parts to be formed.

[0005] To address the aforementioned technical problems, this application proposes a method for forming a part, comprising the following steps:

[0006] Based on the target molded part, a first digital model and first filling molding parameters are obtained;

[0007] Based on the first digital model and the first filling molding parameters, a first part sample is obtained; based on the first part sample, the density value and elongation of the first part sample are obtained; based on the density value and elongation of the first part sample, a second filling molding parameter is obtained.

[0008] Based on the first digital model and the first printing parameters, a second part sample is obtained; based on the second part sample, the surface roughness value of the second part sample is obtained; if the surface roughness value of the second part sample meets a preset threshold, the printing parameters corresponding to the second part sample are used as the second printing parameters.

[0009] Based on the second filling molding parameters and the second printing molding parameters, the target molded part is obtained.

[0010] As some optional embodiments of this application, the step of obtaining a first part sample based on the first digital model and the first filling molding parameters; obtaining the density value and elongation of the first part sample based on the first part sample; and obtaining the second filling molding parameters based on the density value and elongation of the first part sample includes:

[0011] Based on the first digital model and the first filling and molding parameters, a first part sample is obtained; wherein, the first filling and molding parameters include a first laser power and a first scanning rate;

[0012] Based on the first part test block, the filling spacing value of the first part test block is obtained;

[0013] Based on the first part specimen, the density value and elongation of the first part specimen are obtained; based on the density value and elongation of the first part specimen, the second filling molding parameters are obtained.

[0014] As some optional embodiments of this application, obtaining the filling spacing value of the first part test block based on the first part test block includes:

[0015] Based on the first part test block, the single-pass weld width value of the first part test block is obtained;

[0016] Based on the single-pass weld width value of the first part test block, the filling spacing value of the first part test block is obtained.

[0017] As some optional embodiments of this application, the single-pass weld width value of the first part test block is obtained by measurement;

[0018] The filling spacing value of the first part test block is 40% to 60% of the single-pass weld width value of the first part test block.

[0019] As some optional embodiments of this application, the step of obtaining the density value and elongation of the first part test block based on the first part test block, and obtaining the second filling molding parameters based on the density value and elongation of the first part test block, includes:

[0020] Based on the first part test block, the density value of the first part test block is obtained; based on a preset density threshold, the tensile strength test block of the first part is obtained.

[0021] Based on the first part tensile strength test block, the tensile strength of the first part tensile strength test block is obtained; based on the preset tensile strength threshold, the target test block of the first part is obtained.

[0022] Based on the first part target test block, a second filling molding parameter is obtained; wherein, the second filling molding parameter includes the first filling molding parameter of the first part target test block and the filling spacing of the first part target test block.

[0023] As some optional embodiments of this application, the step of obtaining a second part sample based on the first digital model and the first printing parameters; obtaining the surface roughness value of the second part sample based on the second part sample; and if the surface roughness value of the second part sample meets a preset threshold, then using the printing parameters corresponding to the second part sample as the second printing parameters includes:

[0024] Based on the first digital model, first printing parameters are obtained; wherein, the first printing parameters include first contour surface printing parameters, first upper surface printing parameters, and first lower surface printing parameters.

[0025] Based on the first printing parameters, a second part test block is obtained;

[0026] Based on the second part test block, the surface roughness value of the second part test block is obtained; if the surface roughness value of the second part test block meets the preset threshold, the printing molding parameter corresponding to the second part test block is used as the second printing molding parameter.

[0027] As some optional embodiments of this application, the step of obtaining the surface roughness value of the second part test block based on the second part test block; if the surface roughness value of the second part test block meets a preset threshold, then using the printing molding parameters corresponding to the second part test block as the second printing molding parameters includes:

[0028] Based on the second part test block, the surface roughness values ​​of the outline of the second part test block, the surface roughness value of the upper surface, and the surface roughness value of the lower surface are obtained respectively.

[0029] Determine whether the surface roughness value of the second part test block profile meets the preset profile roughness threshold. If it does, then use the first profile surface printing molding parameters as the second profile surface printing molding parameters.

[0030] Determine whether the surface roughness value of the upper surface of the second part test block meets the preset upper surface roughness threshold. If it does, then use the printing molding parameters of the first upper surface as the printing molding parameters of the second upper surface.

[0031] Determine whether the surface roughness value of the lower surface of the second part test block meets the preset lower surface roughness threshold. If it does, then use the printing molding parameters of the first lower surface as the printing molding parameters of the second lower surface.

[0032] The second printing parameters are obtained based on the second contour surface printing parameters, the second upper surface printing parameters, and the second lower surface printing parameters.

[0033] As some optional embodiments of this application, the first printing parameters include printing parameters for a first outer ring and printing parameters for a first additional outer ring; wherein the first additional outer ring is inside the first outer ring.

[0034] As some optional embodiments of this application, obtaining the second part test block based on the first printing parameters includes:

[0035] A first scanning process is performed based on the printing parameters of the first additional outer ring, and a second scanning process is performed based on the printing parameters of the first outer ring to obtain the second part test block.

[0036] As some optional embodiments of this application, the scanning rate of the first scanning process is greater than the scanning rate of the second scanning process.

[0037] Compared with the prior art, the part forming method described in this application includes the following steps: obtaining a first digital model and first filling forming parameters based on the target part. That is, a digital model is constructed based on the target part, and the first filling forming parameters are obtained based on the structure and performance requirements of the target part. Although the first filling forming parameters can be used to print and form the target part, the performance of the obtained target part needs improvement; that is, the performance is generally poor and may not meet application requirements. Therefore, the method described in this application proposes the following solution: obtaining a first part test block based on the first digital model and the first filling forming parameters; obtaining the density value and elongation of the first part test block based on the first part test block; obtaining a second filling forming parameter based on the density value and elongation of the first part test block. That is, this application uses the density value and elongation of the first part test block as preset indicators to determine whether the first part test block obtained based on the first filling forming parameters meets the preset requirements. If it does, the corresponding filling forming parameters are used as the second filling forming parameters, thereby ensuring that the internal filling performance of the target part obtained by the final filling forming meets the application requirements. Furthermore, since it is applied in the aerospace field, there are corresponding requirements for the surface roughness of the target part. Therefore, after obtaining the second filling molding parameters, this application sets the following steps: obtaining a second part test block based on the first digital model and the first printing molding parameters; obtaining the surface roughness value of the second part test block based on the second part test block; if the surface roughness value of the second part test block meets a preset threshold, then the printing molding parameters corresponding to the second part test block are used as the second printing molding parameters. That is, this application uses surface roughness as a preset index to determine whether the second part test block obtained based on the first printing molding parameters meets the preset requirements. If it does, the corresponding printing molding parameters are used as the second printing molding parameters, thereby ensuring that the outer surface roughness of the target part obtained by printing meets the application requirements. Based on the above steps, this application accurately and quickly obtains the second filling molding parameters and the second printing molding parameters, and obtains the target molded part based on the second filling molding parameters and the second printing molding parameters. The target molded part obtained by the above method is based on the application requirements, and the filling molding parameters and printing molding parameters are obtained by reverse deduction. Therefore, the internal and external properties of the target part obtained by molding can meet the application requirements. Attached Figure Description

[0038] Figure 1 This is a schematic flowchart of a part forming method according to an embodiment of this application;

[0039] Figure 2 This is a typical metallographic diagram of the aluminum alloy parts involved in the embodiments of this application;

[0040] Figure 3 This is a schematic diagram of the contour surface scanning involved in the embodiments of this application. Detailed Implementation

[0041] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0042] Selective laser melting forming technology is an additive manufacturing process based on laser powder bed. It features high processing accuracy, high flexibility, and good economy, and is widely used in the manufacture of complex and confidential aerospace structural components.

[0043] With the rapid growth of application demands, how to accurately and quickly obtain the molding parameters of the required parts is an urgent problem to be solved.

[0044] To solve the above technical problems, such as Figure 1 As shown in the embodiments of this application, the technical solution is as follows: a method for forming a part, comprising the following steps:

[0045] Step S10: Based on the target molded part, obtain the first digital model and the first filling molding parameters.

[0046] In practical applications, a digital model is constructed based on the target part to be molded, and first filling molding parameters are obtained based on the structure and performance requirements of the target part. While these first filling molding parameters can be used to print and mold the target part, the performance of the obtained target part needs improvement; that is, the performance is generally poor and may not meet application requirements. Therefore, the method described in this application embodiment proposes the following steps as described in steps S20 to S40:

[0047] Step S20: Based on the first digital model and the first filling molding parameters, obtain a first part sample block; based on the first part sample block, obtain the density value and elongation of the first part sample block; based on the density value and elongation of the first part sample block, obtain the second filling molding parameters.

[0048] In a specific application, step S20 involves obtaining a first part sample based on the first digital model and the first filling molding parameters; obtaining the density and elongation of the first part sample based on the first part sample; and obtaining the second filling molding parameters based on the density and elongation of the first part sample. This includes:

[0049] Step S21: Based on the first digital model and the first filling and molding parameters, obtain a first part test block; wherein, the first filling and molding parameters include a first laser power and a first scanning rate.

[0050] Step S22: Based on the first part test block, obtain the filling spacing value of the first part test block.

[0051] In a specific application, step S22, which involves obtaining the filling spacing value of the first part test block based on the first part test block, includes:

[0052] Based on the first part test block, the single-pass weld width value of the first part test block is obtained; based on the single-pass weld width value of the first part test block, the filling spacing value of the first part test block is obtained.

[0053] In practical applications, the single-pass weld width value of the first part test block is obtained by measurement; the filling spacing value of the first part test block is 40% to 60% of the single-pass weld width value of the first part test block.

[0054] Step S23: Based on the first part test block, obtain the density value and elongation of the first part test block; based on the density value and elongation of the first part test block, obtain the second filling molding parameters.

[0055] In specific applications, step S23, based on the first part sample block, obtains the density value and elongation of the first part sample block; based on the density value and elongation of the first part sample block, obtains the second filling molding parameters, including:

[0056] Step S231: Based on the first part test block, obtain the density value of the first part test block; based on a preset density threshold, obtain the tensile strength test block of the first part.

[0057] Step S232: Based on the first part tensile strength test block, obtain the tensile strength of the first part tensile strength test block; based on the preset tensile strength threshold, obtain the first part target test block;

[0058] Step S233: Based on the first part target test block, obtain the second filling molding parameters; wherein, the second filling molding parameters include the first filling molding parameters of the first part target test block and the filling spacing of the first part target test block.

[0059] In other words, this application, as described above, uses the density and elongation of the first part sample block as preset indicators to determine whether the first part sample block obtained based on the first filling molding parameters meets the preset requirements. If it does, the corresponding filling molding parameters are used as the second filling molding parameters, thereby ensuring that the internal filling performance of the target part obtained by the final filling molding meets the application requirements. Furthermore, since the application is in the aerospace field, there are corresponding requirements for the surface roughness of the target part. Therefore, after obtaining the second filling molding parameters, this application sets up the technical solution described in step S30:

[0060] Step S30: Based on the first digital model and the first printing parameters, obtain a second part block; based on the second part block, obtain the surface roughness value of the second part block; if the surface roughness value of the second part block meets a preset threshold, then use the printing parameters corresponding to the second part block as the second printing parameters.

[0061] Step S30 involves obtaining a second part sample based on the first digital model and the first printing parameters; obtaining the surface roughness value of the second part sample based on the second part sample; and if the surface roughness value of the second part sample meets a preset threshold, then using the printing parameters corresponding to the second part sample as the second printing parameters, including:

[0062] Step S31: Based on the first digital model, obtain the first printing molding parameters; wherein, the first printing molding parameters include the first contour surface printing molding parameters, the first upper surface printing molding parameters, and the first lower surface printing molding parameters.

[0063] In a specific application, the first printing parameters include the printing parameters of the first outer ring and the printing parameters of the first additional outer ring; wherein the first additional outer ring is inside the first outer ring.

[0064] Step S32: Based on the first printing and molding parameters, obtain the second part test block.

[0065] The step S32, which involves obtaining a second part sample based on the first printing parameters, includes: performing a first scanning process based on the printing parameters of the first additional outer ring, and then performing a second scanning process based on the printing parameters of the first outer ring to obtain the second part sample.

[0066] The scanning rate of the first scan process is greater than the scanning rate of the second scan process.

[0067] Step S33: Based on the second part test block, obtain the surface roughness value of the second part test block; if the surface roughness value of the second part test block meets the preset threshold, then use the printing molding parameter corresponding to the second part test block as the second printing molding parameter.

[0068] In a specific application, step S33 involves obtaining the surface roughness value of the second part test block based on the second part test block; if the surface roughness value of the second part test block meets a preset threshold, then the printing parameters corresponding to the second part test block are used as the second printing parameters, including:

[0069] Step S331: Based on the second part test block, obtain the surface roughness value of the outline of the second part test block, the surface roughness value of the upper surface and the surface roughness value of the lower surface respectively;

[0070] Step S332: Determine whether the surface roughness value of the second part test block contour meets the preset contour surface roughness threshold. If it does, use the first contour surface printing molding parameter as the second contour surface printing molding parameter; determine whether the surface roughness value of the upper surface of the second part test block meets the preset upper surface roughness threshold. If it does, use the first upper surface printing molding parameter as the second upper surface printing molding parameter; determine whether the surface roughness value of the lower surface of the second part test block meets the preset lower surface roughness threshold. If it does, use the first lower surface printing molding parameter as the second lower surface printing molding parameter.

[0071] Step S333: Based on the second contour surface printing molding parameters, the second upper surface printing molding parameters, and the second lower surface printing molding parameters, obtain the second printing molding parameters.

[0072] In other words, the method described above in this application uses surface roughness as a preset index to determine whether the second part test block obtained based on the first printing molding parameters meets the preset requirements. If it does, the corresponding printing molding parameters are used as the second printing molding parameters, thereby ensuring that the outer surface roughness of the target part obtained by the final printing molding meets the application requirements.

[0073] Step S40: Based on the second filling molding parameters and the second printing molding parameters, obtain the target molded part.

[0074] The target molded part obtained by the above method is based on the application requirements and the filling molding parameters and printing molding parameters are obtained by reverse deduction. Therefore, the internal and external properties of the target part obtained by molding can meet the application requirements.

[0075] The method described in this application is further defined below with reference to specific embodiments:

[0076] Example 1

[0077] In this embodiment, AlMgScZr high-strength aluminum alloy is used as the target part, and its composition is Al-(5~6)wt%Mg-(0.5~0.6)wt%Mn-(0.5~1)wt%Sc-(0~1)wt%Zr-0.02wt%Si.

[0078] The target part is formed through the following steps:

[0079] Step 1: Obtain the initial filling and molding parameters.

[0080] Based on the target part to be molded, a first digital model is obtained. The first digital model has a wall thickness of 0.3 mm and is placed parallel to the direction of the squeegee movement to prevent it from being scraped away by the squeegee during the printing process.

[0081] Based on the target molded part, first filling molding parameters are obtained; wherein, the first filling molding parameters include: first layer thickness of 0.03 mm, first laser power of 300-380 W, and first scanning rate of 1000-1500 mm / s.

[0082] Based on the first digital model and the first filling molding parameters, a first part test block is obtained; the single-pass melt width value of the first part test block is measured using a vernier caliper or micrometer.

[0083] Based on the first laser power, the first scanning rate, and the single-pass melt width value, an orthogonal process parameter table is set, as shown in Table 1:

[0084] Table 1:

[0085] serial number Laser power W Scanning speed mm / s Single-pass weld width (mm) 1 300 1300 0.25 2 310 1300 0.267 3 320 1300 0.28 4 330 1300 0.28 5 340 1300 0.28 6 350 1300 0.28 7 360 1300 0.29 8 370 1300 0.29 9 350 1000 0.30 10 350 1050 0.29 11 350 1100 0.28 12 350 1150 0.27 13 350 1200 0.27 14 350 1250 0.26 15 350 1350 0.25 16 350 1400 0.24

[0086] The filling spacing value of the first part test block is calculated based on the single-pass weld width obtained from the above measurement. That is, the filling spacing value of the first part test block is 40% to 60% of the single-pass weld width value of the first part test block.

[0087] Step 2: Optimize the initial filling and molding parameters.

[0088] Several first part specimens were obtained using different filling and molding parameters as shown in Table 1. After sanding the surfaces of these specimens, the density of each specimen was measured using the Archimedes method. The measurement results are shown in Table 2.

[0089] Table 2:

[0090]

[0091]

[0092] Seven part samples with optimal density were selected. Therefore, the first optimized filling and forming parameters included: laser power of 300–330 W and 350 W, and scanning speeds of 1300 mm / s and 1050–1150 mm / s. In practical applications, the metallographic structure of the first part sample selected through the preset density threshold can be observed using an optical microscope. A typical metallographic photograph of this aluminum alloy part is shown below. Figure 2 As shown, if the first part test block has no obvious holes or hot cracks, proceed to the next step:

[0093] The first part specimen prepared using the optimized filling and molding parameters (laser power of 300-330W and 350W, scanning speed of 1300mm / s and 1050-1150mm / s) was subjected to tensile strength testing. The test results are shown in Table 3.

[0094] Table 3:

[0095]

[0096] In this embodiment, two part test blocks with the best elongation are selected, namely No. 2 and No. 4. Based on comprehensive considerations such as preparation efficiency, this application uses the filling molding parameter corresponding to No. 4 and the above-mentioned filling spacing value as the second filling molding parameter, that is, the optimized filling molding parameter.

[0097] Step 3: Optimize the initial printing parameters.

[0098] Based on the first digital model, first printing parameters are obtained; wherein, the first printing parameters include first contour surface printing parameters, first upper surface printing parameters, and first lower surface printing parameters; wherein, the first printing parameters include first outer ring printing parameters and first additional outer ring printing parameters; wherein, the first additional outer ring is inside the first outer ring; wherein, the contour surface scanning schematic diagram is shown below. Figure 3 As shown.

[0099] A first scanning process is performed based on the printing parameters of the first additional outer ring, and a second scanning process is performed based on the printing parameters of the first outer ring to obtain a second part sample block; wherein the scanning rate of the first scanning process is greater than the scanning rate of the second scanning process.

[0100] The surface roughness values ​​of the contour surface, upper surface, and lower surface of the second part specimen were obtained using a roughness tester and a scanning electron microscope; the results are shown in Table 4.

[0101] Table 4:

[0102]

[0103]

[0104] Select the part test block with the smallest contour surface roughness, the part test block with the smallest upper surface roughness, and the part test block with the smallest lower surface roughness respectively, and use their corresponding printing parameters as the second printing parameters.

[0105] Therefore, the optimized printing parameters include:

[0106] The second printing parameters for the contour surface are: outer ring laser power 325W, scanning speed 400mm / s, additional outer ring 360W, scanning speed 1050mm / s;

[0107] The second printing parameters for the upper surface are: outer ring laser power 325W, scanning speed 400mm / s, additional outer ring 360W, scanning speed 1050mm / s;

[0108] The second printing parameters for the lower surface are: outer ring laser power 450W, scanning speed 650mm / s, and additional outer ring 360W, scanning speed 1050mm / s.

[0109] Step 4: Based on the second filling molding parameters and the second printing molding parameters, obtain the target molded part.

[0110] Therefore, compared with the prior art, the part forming method described in this application includes the following steps: obtaining a first digital model and first filling forming parameters based on the target part. That is, a digital model is constructed based on the target part, and the first filling forming parameters are obtained based on the structure and performance requirements of the target part. Although the first filling forming parameters can be used to print and form the target part, the performance of the target part obtained here needs to be improved, that is, the performance is average and may not meet the application requirements. Therefore, the method described in this application proposes the following solution: obtaining a first part test block based on the first digital model and the first filling forming parameters; obtaining the density value and elongation of the first part test block based on the first part test block; obtaining a second filling forming parameter based on the density value and elongation of the first part test block. That is, this application uses the density value and elongation of the first part test block as preset indicators to determine whether the first part test block obtained based on the first filling forming parameters meets the preset requirements. If it meets the requirements, the corresponding filling forming parameters are used as the second filling forming parameters, thereby ensuring that the internal filling performance of the target part obtained by the final filling forming meets the application requirements. Furthermore, since it is applied in the aerospace field, there are corresponding requirements for the surface roughness of the target part. Therefore, after obtaining the second filling molding parameters, this application sets the following steps: obtaining a second part test block based on the first digital model and the first printing molding parameters; obtaining the surface roughness value of the second part test block based on the second part test block; if the surface roughness value of the second part test block meets a preset threshold, then the printing molding parameters corresponding to the second part test block are used as the second printing molding parameters. That is, this application uses surface roughness as a preset index to determine whether the second part test block obtained based on the first printing molding parameters meets the preset requirements. If it does, the corresponding printing molding parameters are used as the second printing molding parameters, thereby ensuring that the outer surface roughness of the target part obtained by printing meets the application requirements. Based on the above steps, this application accurately and quickly obtains the second filling molding parameters and the second printing molding parameters, and obtains the target molded part based on the second filling molding parameters and the second printing molding parameters. The target molded part obtained by the above method is based on the application requirements, and the filling molding parameters and printing molding parameters are obtained by reverse deduction. Therefore, the internal and external properties of the target part obtained by molding can meet the application requirements.

[0111] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for forming a part, characterized in that, Includes the following steps: Based on the target molded part, a first digital model and first filling molding parameters are obtained; Based on the first digital model and the first filling molding parameters, a first part test block is obtained; Based on the first part specimen, the density value and elongation of the first part specimen are obtained; based on the density value and elongation of the first part specimen, second filling molding parameters are obtained; including: The first filling and molding parameters include a first laser power and a first scanning rate; Based on the first part test block, the filling spacing value of the first part test block is obtained; If the density and elongation of the first part specimen both meet the preset threshold, then the filling molding parameters and filling spacing values ​​corresponding to the first part specimen are used as the second filling molding parameters. Based on the first part test block, the filling spacing value of the first part test block is obtained, including: Based on the first part test block, the single-pass weld width value of the first part test block is obtained; Based on the single-pass weld width value of the first part test block, the filler spacing value of the first part test block is obtained; wherein, the single-pass weld width value of the first part test block is obtained by measurement; the filler spacing value of the first part test block is 40% to 60% of the single-pass weld width value of the first part test block; Based on the first digital model and the first printing parameters, a second part sample is obtained; based on the second part sample, the surface roughness value of the second part sample is obtained; if the surface roughness value of the second part sample meets a preset threshold, the printing parameters corresponding to the second part sample are used as the second printing parameters; including: Based on the first digital model, first printing parameters are obtained; wherein, the first printing parameters include first contour surface printing parameters, first upper surface printing parameters, and first lower surface printing parameters. Based on the first printing parameters, a second part test block is obtained; Based on the second filling molding parameters and the second printing molding parameters, the target molded part is obtained.

2. The forming method of the part according to claim 1, characterized in that, The process of obtaining the density and elongation of the first part sample block, and obtaining the second filling molding parameters based on the density and elongation of the first part sample block, includes: Based on the first part test block, the density value of the first part test block is obtained; based on a preset density threshold, the tensile strength test block of the first part is obtained. Based on the first part tensile strength test block, the tensile strength of the first part tensile strength test block is obtained; based on the preset tensile strength threshold, the target test block of the first part is obtained. Based on the first part target test block, a second filling molding parameter is obtained; wherein, the second filling molding parameter includes the first filling molding parameter of the first part target test block and the filling spacing of the first part target test block.

3. The forming method of the part according to claim 1, characterized in that, The surface roughness value of the second part test block is obtained based on the second part test block; If the surface roughness value of the second part sample block meets the preset threshold, then the printing parameters corresponding to the second part sample block are used as the second printing parameters, including: Based on the second part test block, the surface roughness values ​​of the outline of the second part test block, the surface roughness value of the upper surface, and the surface roughness value of the lower surface are obtained respectively. Determine whether the surface roughness value of the second part test block profile meets the preset profile roughness threshold. If it does, then use the first profile surface printing molding parameters as the second profile surface printing molding parameters. Determine whether the surface roughness value of the upper surface of the second part test block meets the preset upper surface roughness threshold. If it does, then use the printing molding parameters of the first upper surface as the printing molding parameters of the second upper surface. Determine whether the surface roughness value of the lower surface of the second part test block meets the preset lower surface roughness threshold. If it does, then use the printing molding parameters of the first lower surface as the printing molding parameters of the second lower surface. The second printing parameters are obtained based on the second contour surface printing parameters, the second upper surface printing parameters, and the second lower surface printing parameters.

4. The forming method of the part according to claim 1, characterized in that, The first printing parameters include printing parameters for a first outer ring and printing parameters for a first additional outer ring; wherein the first additional outer ring is inside the first outer ring.

5. The forming method of the part according to claim 4, characterized in that, The process of obtaining the second part test block based on the first printing parameters includes: A first scanning process is performed based on the printing parameters of the first additional outer ring, and a second scanning process is performed based on the printing parameters of the first outer ring to obtain the second part test block.

6. The forming method of the part according to claim 5, characterized in that, The scanning rate of the first scan is greater than the scanning rate of the second scan.

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