3D printing method for metal covered edge of blade

Abstract

The invention discloses a 3D printing method for a metal covered edge of a blade, and belongs to the technical field of 3D printing. The 3D printing method comprises the following steps that S1, an edge covering model is established; s2, the inclined face of the edge covering model is marked, and the inclined face is stretched downwards by the grinding allowance to form a stretched face; s3, a bottom supporting model is added to vertically extend to the printing platform from the stretching surface; s4, thin-wall grid supporting models are added to the two opposite outer side faces of the edge covering model respectively; s5, slice printing is carried out, so that a covered edge, a bottom support and a thin-wall grid support are formed through printing; s6, the covering edge, the bottom support, the thin-wall grid support and the printing platform are subjected to powder cleaning and heat treatment; and S7, the printing platform, the bottom support and the thin-wall grid support are separated through linear cutting, and the bottom support and the thin-wall grid support on the covered edge are removed. According to the method, it can be guaranteed that the covered edge is not prone to deformation in the printing process, and the thin-wall grid support on the covered edge can be removed easily.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a 3D printing method for metal edging of a blade. Background Art

[0002] At present, high-temperature alloy edging is usually used on the leading edge of the fan blade to improve the blade's resistance to impact. Since the edging is a thin-walled curved surface structure, the wall thickness of the edging is generally less than 0.5 mm, and the length of the edging is usually more than 300 mm. Therefore, in order to reduce the difficulty of edging production and shorten the production cycle, 3D printing is currently generally used to make the edging.

[0003] However, since the deformation of the 3D printing hemming is difficult to control, the hemming is easily deformed during the printing process, resulting in poor printing effect of the hemming; and, since the connection strength between the hemming and the support is high, it is difficult to remove the support on the hemming after printing. Even if the support can be removed, it is easy to damage the hemming, resulting in poor quality of the hemming.

[0004] In view of the above problems, a 3D printing method for blade metal edging is urgently needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to propose a 3D printing method for blade metal edging, which can ensure that the edging is not easily deformed during the printing process and can facilitate the removal of thin-walled mesh supports on the edging.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The 3D printing method for blade metal edging includes the following steps:

[0008] S1: Establish the hemming model;

[0009] S2: marking an inclined surface whose angle between the bottom end of the hemming model and the printing platform is less than 45°, and stretching and grinding the marked inclined surface downward in a direction close to the printing platform to form a stretching surface;

[0010] S3: adding a bottom support model to the stretching surface, wherein the bottom support model vertically extends from the stretching surface to the printing platform;

[0011] S4: adding thin-walled mesh support models to two opposite outer side surfaces of the hemming model respectively, wherein the connection between the thin-walled mesh support model and the outer side surface is a cross-shaped structure;

[0012] S5: Slice and print according to the edge wrapping model, the bottom support model and the thin-walled mesh support model to print and form an edge wrapping, a bottom support supported between the edge wrapping and the printing platform, and a thin-walled mesh support;

[0013] S6: performing powder cleaning and heat treatment on the hemming, the bottom support, the thin-walled grid support and the printing platform;

[0014] S7: Use wire cutting to separate the printing platform from the bottom support and the thin-walled mesh support, and remove the bottom support and the thin-walled mesh support on the hemming.

[0015] As an optional solution, after the hemming model is established in step S1, it is necessary to adjust the placement angle of the hemming model so that the opening of the hemming model faces upward.

[0016] As an optional solution, the thin-walled grid support model adopts a diamond-shaped hollow structure, the angle A of the diamond-shaped hollow structure is ≥45°, the width of the diamond-shaped hollow structure is 3mm-5mm, and the side width of the diamond-shaped hollow structure is 0.5mm-1mm.

[0017] As an optional solution, the bottom support model is a cylinder with an outer diameter of 0.1mm-0.3mm.

[0018] As an optional solution, when printing the edge wrapping, high-temperature alloy powder with a particle size of 15μm-53μm is used, the laser scanning power during printing is 240W-260W, the laser scanning rate is 900mm / s-1200mm / s, and the laser scanning spacing is 0.08mm-0.1mm.

[0019] As an optional solution, when printing the bottom support and the thin-walled grid support, high-temperature alloy powder with a particle size of 15μm-53μm is used, the laser scanning power during printing is 180W-220W, the laser scanning rate is 1300mm / s-1500mm / s, and the laser scanning spacing is 0.1mm-0.12mm.

[0020] As an optional solution, heat treating the overall structure formed by the hemming, the bottom support, the thin-walled mesh support and the printing platform comprises the following steps:

[0021] S61: solution treatment: heating the overall structure from room temperature 25°C to 1000°C-1100°C for 3h-4h, and keeping the temperature at 1000°C-1100°C for 1h-2h. After the temperature keeping is completed, the overall structure is quickly cooled by air cooling or argon gas;

[0022] S62: Aging treatment: The overall structure treated in step S61 is heated from room temperature 25°C to 700°C-800°C in 2h-3h, and kept at 700°C-800°C for 8h-9h. After the insulation is completed, the overall structure is furnace-cooled to 600°C-650°C for 2h, and kept at 600°C-650°C for 8h-9h. After the insulation is completed, the overall structure is cooled by air cooling or argon gas.

[0023] As an optional solution, after removing the bottom support and the thin-walled grid support on the edge in step S7, the following steps are also included:

[0024] S8: Grinding the stretching surface and the two outer side surfaces of the hemming.

[0025] As an optional solution, the grinding allowance is 0.1 mm-0.15 mm.

[0026] As an optional solution, the dimensional error between the size of the printed edge and the preset size is ±0.1 mm.

[0027] The beneficial effects of the present invention are:

[0028] The 3D printing method of blade metal edging in the present invention first establishes an edging model, then marks an inclined surface with an angle of less than 45° between the bottom end of the edging model and the printing platform, and stretches and grinds the marked inclined surface downward in a direction close to the printing platform to form a stretched surface; then a bottom support model is added to the stretched surface, and the bottom support model extends vertically from the stretched surface to the printing platform; then, thin-walled mesh support models are added to the two opposite outer side surfaces of the edging model, and the connection between the thin-walled mesh support model and the outer side surface is a cross-shaped structure; then, slice printing is performed according to the above-mentioned edging model, bottom support model and thin-walled mesh support model to print and form edging, as well as the bottom support and thin-walled mesh support supported between the edging and the printing platform; then, the edging, bottom support, thin-walled mesh support and the printing platform as a whole are powder cleaned and heat treated; finally, wire cutting is used to separate the printed The platform and the bottom support and the thin-walled mesh support are then removed, so as to form a separate and complete structure of the edge; in the above-mentioned printing process, thin-walled mesh support models are respectively added to the two opposite outer sides of the edge model, and the connection between the thin-walled mesh support model and the outer side is a cross-shaped structure; on the one hand, it is ensured that the thin-walled mesh support has a certain support strength for the outer side of the edge, so that the thin-walled mesh support has a certain limiting pulling force on the outer side, which is easy to control the deformation of the edge, and can ensure that the edge is not easily deformed during the printing process, thereby ensuring a better printing effect for the edge; on the other hand, the connection strength between the thin-walled mesh support and the outer side of the edge is relatively weak, which is conducive to easier removal of the thin-walled mesh support on the edge in step S7, so that damage to the edge can be avoided during the removal process, thereby ensuring a better quality of the edge formed by printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the hemming formed by 3D printing provided by the present invention at one viewing angle;

[0030] Figure 2 is a schematic structural diagram of the hemming formed by 3D printing provided by the present invention from another perspective;

[0031] Figure 3 It is a schematic flow chart of the 3D printing method for blade metal edging provided by the present invention;

[0032] Figure 4 It is a structural schematic diagram of the hemming model provided by the present invention;

[0033] Figure 5 It is a structural schematic diagram of adding a bottom support model between the stretching surface of the hemming model and the printing platform provided by the present invention;

[0034] Figure 6It is a schematic diagram of the analysis of adding a thin-walled grid support model on the two outer sides of the hemming model provided by the present invention;

[0035] Figure 7 It is a structural schematic diagram of a thin-walled grid support model (diamond-shaped hollow structure) provided by the present invention;

[0036] Figure 8 It is a schematic diagram of the heat treatment process provided by the present invention.

[0037] Description of reference numerals:

[0038] 1-edge model; 11-inclined surface; 12-stretching surface; 13-outer surface; 14-opening;

[0039] 2-bottom support model; 3-thin-wall grid support model; 4-printing platform; 5-edge wrapping;

[0040] A-angle; W-width; E-side width. DETAILED DESCRIPTION

[0041] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0042] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features. Throughout the specification, the same reference numerals indicate the same elements.

[0043] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0044] This embodiment proposes a 3D printing method for blade metal edging, such as Figure 1 and Figure 2 As shown, the 3D printing method of the blade metal edging is used to print the edging 5, and can ensure good quality of the printed edging 5. Among them, the edging 5 is a curved thin-walled part, the wall thickness of the edging 5 is less than 0.5mm, the length of the edging 5 is more than 300mm, and the material of the edging 5 is a high-temperature alloy.

[0045] Specifically, Figures 3 to 6 As shown, the 3D printing method for blade metal edging includes the following steps:

[0046] S1: Establish hemming model 1;

[0047] S2: marking an inclined surface 11 whose angle between the bottom end of the hemming model 1 and the printing platform 4 is less than 45°, and stretching and grinding the marked inclined surface 11 downward in a direction close to the printing platform 4 to form a stretching surface 12;

[0048] S3: adding a bottom support model 2 to the stretching surface 12, wherein the bottom support model 2 extends vertically from the stretching surface 12 to the printing platform 4;

[0049] S4: adding thin-walled mesh support models 3 to two opposite outer side surfaces 13 of the hemming model 1 respectively, and the connection between the thin-walled mesh support model 3 and the outer side surface 13 is a cross-shaped structure;

[0050] S5: Slice and print according to the edge wrapping model 1, the bottom support model 2 and the thin-walled mesh support model 3 to print and form the edge wrapping 5, the bottom support supported between the edge wrapping 5 and the printing platform 4, and the thin-walled mesh support;

[0051] S6: Clean the powder and perform heat treatment on the edge 5, the bottom support, the thin-walled mesh support and the printing platform 4;

[0052] S7: Use wire cutting to separate the printing platform 4 from the bottom support and the thin-walled mesh support, and remove the bottom support and the thin-walled mesh support on the edge 5.

[0053] During the above-mentioned printing process, thin-walled grid support models 3 are respectively added to the two opposite outer side surfaces 13 of the edging model 1, and the connection between the thin-walled grid support model 3 and the outer side surface 13 is a cross-shaped structure; on the one hand, it is ensured that the thin-walled grid support has a certain supporting strength for the outer side surface 13 of the edging 5, so that the thin-walled grid support has a certain limiting pulling force on the outer side surface 13, which is easy to control the deformation of the edging 5, and can ensure that the edging 5 is not easy to deform during the printing process, thereby ensuring a better printing effect for the edging 5; on the other hand, the connection strength between the thin-walled grid support and the outer side surface 13 of the edging 5 is relatively weak, which is conducive to easier removal of the thin-walled grid support on the edging 5 in step S7, so that damage to the edging 5 can be avoided during the removal of the thin-walled grid support, thereby ensuring that the quality of the printed edging 5 is better.

[0054] By making the bottom support model 2 added on the stretching surface 12 extend vertically to the printing platform 4 in step S3, the bottom support has a certain limiting pulling force on the stretching surface 12, so that the bottom end of the edge package 5 can be prevented from warping during the printing process through the supporting and pulling effect of the bottom support on the stretching surface 12, thereby ensuring a better printing effect on the bottom end of the edge package 5, and further ensuring a better quality of the printed edge package 5.

[0055] It is worth noting that, since the deformation of the stretch surface 12 at the bottom end of the edging 5 is relatively small during the printing process, adding a bottom support on the stretch surface 12 can ensure that the bottom end of the edging 5 is not easily deformed during the printing process; and, since the deformation of the stretch surface 12 at the bottom end of the edging 5 is relatively small during the printing process, the limiting pulling force of the bottom support on the stretch surface 12 does not need to be too large, so that the connection strength between the bottom support and the stretch surface 12 of the edging 5 can be relatively weak, which can facilitate the easier removal of the bottom support on the edging 5 in step S7, so that damage to the edging 5 can be avoided during the removal of the bottom support, thereby ensuring that the quality of the printed edging 5 is better.

[0056] Furthermore, if Figures 4 to 6 As shown, after establishing the edge-wrapping model 1 in step S1, it is necessary to adjust the placement angle of the edge-wrapping model 1 so that the opening 14 of the edge-wrapping model 1 faces upward, thereby being helpful in controlling the deformation of the edge-wrapping 5 during the printing process and being helpful in adding bottom support and thin-wall mesh support to the edge-wrapping model 1.

[0057] Specifically, Figure 6 and Figure 7 As shown, the thin-walled mesh support model 3 adopts a diamond-shaped hollow structure, the angle A of the diamond-shaped hollow structure is ≥ 45°, the width W of the diamond-shaped hollow structure is 3mm-5mm, and the side width E of the diamond-shaped hollow structure is 0.5mm-1mm; on the one hand, it is easy to print the diamond-shaped hollow structure in the subsequent printing process, making the printing of the thin-walled mesh support relatively simple and convenient; on the other hand, it can save the printing material of the thin-walled mesh support and reduce the weight of the thin-walled mesh support; at the same time, it can reduce the connection strength between the thin-walled mesh support and the outer side surface 13 of the edge 5, which is more conducive to more easily removing the thin-walled mesh support on the edge 5 in step S7; and, through the diamond-shaped hollow structure, it can be conducive to cleaning the edge 5, the bottom support, the thin-walled mesh support and the printing platform 4 in step S6, making the powder cleaning more convenient and easy. In other embodiments, the thin-walled mesh support model 3 can also adopt a water drop-shaped hollow structure, which is not specifically limited here.

[0058] Furthermore, if Figure 5 As shown, the bottom support model 2 is a cylinder with an outer diameter of 0.1mm-0.3mm. The use of a cylindrical bottom support model 2 makes the printing of the bottom support relatively simple and convenient, and can prevent the bottom end of the edge 5 from warping during the printing process, while reducing the connection strength between the thin-walled mesh support and the outer side surface 13 of the edge 5. In other embodiments, the bottom support model 2 can also be a square column, which is not specifically limited here.

[0059] Specifically, when 3D printing the edge packaging 5, high-temperature alloy powder with a particle size of 15μm-53μm is used, and the laser scanning power during printing is 240W-260W, the laser scanning rate is 900mm / s-1200mm / s, and the laser scanning spacing is 0.08mm-0.1mm, so as to ensure that the printed edge packaging 5 has good structural strength through the above-mentioned printing parameters.

[0060] Furthermore, when 3D printing the bottom support and thin-walled mesh support, a high-temperature alloy powder with a particle size of 15μm-53μm is used, and the laser scanning power during printing is 180W-220W, the laser scanning rate is 1300mm / s-1500mm / s, and the laser scanning spacing is 0.1mm-0.12mm, so as to ensure that the printed bottom support and thin-walled mesh support have good structural strength through the above printing parameters.

[0061] Specifically, Figure 8 As shown, heat treatment of the overall structure formed by the edge wrapping 5, the bottom support, the thin-walled mesh support and the printing platform 4 includes the following steps:

[0062] S61: Solution treatment: Heat the whole structure from room temperature 25℃ to 1000℃-1100℃ for 3h-4h, and keep it at 1000℃-1100℃ for 1h-2h. After the insulation is completed, the whole structure is quickly cooled by air cooling or argon gas;

[0063] S62: Aging treatment: The overall structure treated in step S61 is heated from room temperature 25°C to 700°C-800°C in 2h-3h, and kept at 700°C-800°C for 8h-9h. After the insulation is completed, the overall structure is furnace-cooled to 600°C-650°C for 2h, and kept at 600°C-650°C for 8h-9h. After the insulation is completed, the overall structure is cooled by air cooling or argon gas; thereby, the quality of the formed edge 5 can be ensured to be better through the above-mentioned solution treatment and aging treatment.

[0064] Furthermore, after removing the bottom support and the thin-walled grid support on the edge package 5 in step S7 , the following step S8 is also included: grinding the stretching surface 12 and two outer side surfaces 13 of the edge package 5 to ensure the smoothness of the surface of the edge package 5 .

[0065] It is worth noting that, since in step S2, the marked inclined surface 11 is stretched downward toward the printing platform 4 by a grinding allowance to form a stretching surface 12, the stretching surface 12 and two outer side surfaces 13 of the hemming 5 can be polished by the grinding allowance in step S8 to form a smooth hemming 5 without polishing the structure of the hemming 5. Specifically, the grinding allowance is 0.1 mm-0.15 mm.

[0066] Furthermore, if Figure 1 and Figure 2 As shown, the dimensional error between the size of the edging 5 printed by the 3D printing method of the blade metal edging in this embodiment and the preset size is ±0.1mm, that is, the size of the edging 5 printed by the 3D printing method of the blade metal edging in this embodiment meets the requirements, and deformation of the edging 5 during the printing process is better avoided.

[0067] The specific printing process of the 3D printing method for blade metal edging in this embodiment is as follows: Figure 3 As shown:

[0068] First, a hemming model 1 is established, and the placement angle of the hemming model 1 is adjusted so that the opening 14 of the hemming model 1 faces upward.

[0069] Afterwards, the inclined surface 11 with an angle of less than 45° between the bottom end of the edging model 1 and the printing platform 4 is marked, and the marked inclined surface 11 is stretched downward in the direction close to the printing platform 4 by a grinding allowance to form a stretching surface 12, so that the grinding allowance can be used as the allowance for grinding the surface of the edging 5 in the subsequent step S8.

[0070] Then, a bottom support model 2 is added to the stretching surface 12, and the bottom support model 2 is vertically extended from the stretching surface 12 to the printing platform 4, so as to prevent the bottom end of the edge 5 from warping during the printing process.

[0071] Then, a thin-walled grid support model 3 is added to the two opposite outer side surfaces 13 of the edging model 1 respectively. The thin-walled grid support model 3 adopts a diamond hollow structure, and the connection between the diamond hollow structure and the outer side surface 13 is a cross-shaped structure, so that the diamond hollow structure has a certain supporting strength for the outer side surface 13, ensuring that the edging 5 does not deform during the printing process, and can make the connection between the diamond hollow structure and the outer side surface 13 of the edging 5 relatively weak, so as to facilitate the removal of the diamond hollow structure in the subsequent step S7 without causing damage to the edging 5.

[0072] Afterwards, high-temperature alloy powder with a particle size of 15 μm-53 μm, a laser scanning power of 240 W-260 W, a laser scanning rate of 900 mm / s-1200 mm / s, and a laser scanning spacing of 0.08 mm-0.1 mm are used to perform 3D slice printing on the edge 5.

[0073] At the same time, high-temperature alloy powder with a particle size of 15μm-53μm, laser scanning power of 180W-220W, laser scanning rate of 1300mm / s-1500mm / s, and laser scanning spacing of 0.1mm-0.12mm are used to perform 3D slice printing on the bottom support and thin-walled grid support respectively.

[0074] Afterwards, the printing platform 4, the printed edging 5, the bottom support, and the thin-walled mesh support as a whole are heat treated: first, the whole structure is heated from room temperature 25°C to 1000°C-1100°C in 3h-4h, and kept at 1000°C-1100°C for 1h-2h. After the insulation is completed, the whole structure is quickly cooled by air cooling or argon gas; then, the whole structure treated by step S61 is heated from room temperature 25°C to 700°C-800°C in 2h-3h, and kept at 700°C-800°C for 8h-9h. After the insulation is completed, the whole structure is furnace cooled to 600°C-650°C for 2h, and kept at 600°C-650°C for 8h-9h. After the insulation is completed, the whole structure is cooled by air cooling or argon gas.

[0075] Then, use wire cutting to separate the bottom support and the thin-walled mesh support from the printing platform 4 to separate the edge 5 from the printing platform 4; then manually remove the bottom support and the thin-walled mesh support on the edge 5.

[0076] Finally, the stretching surface 12 and the two outer side surfaces 13 of the edge 5 are polished by grinding the allowance to form an edge 5 with a smooth surface; thereby completing the entire process of 3D printing the edge 5.

[0077] The 3D printing method for blade metal edging in this embodiment can quickly form the edging 5 by 3D printing the edging 5, thereby shortening the production cycle of the edging 5; and, thin-walled mesh support models 3 are respectively added to the two opposite outer side surfaces 13 of the edging model 1 to reduce the amount of support for the outer side surfaces 13, save costs, better control the deformation of the edging 5 during the printing process, and make it simpler and faster to remove the thin-walled mesh support on the edging 5 later, thereby ensuring that the quality of the printed edging 5 is good.

[0078] In addition, by making the bottom support model 2 added on the stretching surface 12 extend vertically to the printing platform 4, the bottom support has a certain limiting pulling force on the stretching surface 12, so that the bottom end of the edge 5 can be prevented from warping during the printing process through the supporting and pulling effect of the bottom support on the stretching surface 12.

[0079] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A 3D printing method for blade metal edging, characterized in that: The following steps are involved: S1: Establish the hemming model (1); S2: marking an inclined surface (11) whose angle between the bottom end of the hemming model (1) and the printing platform (4) is less than 45°, and stretching and grinding the marked inclined surface (11) downward in a direction close to the printing platform (4) to form a stretching surface (12); S3: adding a bottom support model (2) to the stretching surface (12), wherein the bottom support model (2) extends vertically from the stretching surface (12) to the printing platform (4); S4: adding thin-walled grid support models (3) to two opposite outer side surfaces (13) of the edge wrapping model (1), respectively, wherein the connection between the thin-walled grid support model (3) and the outer side surface (13) is in a cross-shaped structure; S5: Slice and print the edge wrapping model (1), the bottom support model (2) and the thin-walled mesh support model (3) to print and form an edge wrapping (5), a bottom support supported between the edge wrapping (5) and the printing platform (4) and a thin-walled mesh support; S6: performing powder cleaning and heat treatment on the edge wrapping (5), the bottom support, the thin-walled grid support and the printing platform (4); S7: Use wire cutting to separate the printing platform (4) from the bottom support and the thin-walled mesh support, and remove the bottom support and the thin-walled mesh support on the hemming (5).

2. The 3D printing method for blade metal edging according to claim 1, characterized in that: After the edge-wrapping model (1) is established in step S1, it is necessary to adjust the placement angle of the edge-wrapping model (1) so that the opening (14) of the edge-wrapping model (1) faces upward.

3. The 3D printing method for blade metal edging according to claim 1, characterized in that: The thin-walled grid support model (3) adopts a diamond-shaped hollow structure, the angle A of the diamond-shaped hollow structure is ≥45°, the width of the diamond-shaped hollow structure is 3mm-5mm, and the side width of the diamond-shaped hollow structure is 0.5mm-1mm.

4. The 3D printing method for blade metal edging according to claim 1, characterized in that: The bottom support model (2) is a cylinder with an outer diameter of 0.1 mm-0.3 mm.

5. The 3D printing method for blade metal edging according to claim 1, characterized in that: When printing the edge wrapping (5), high temperature alloy powder with a particle size of 15 μm-53 μm is used, the laser scanning power during printing is 240W-260W, the laser scanning rate is 900mm / s-1200mm / s, and the laser scanning spacing is 0.08mm-0.1mm.

6. The 3D printing method for blade metal edging according to any one of claims 1 to 5, characterized in that: When printing the bottom support and the thin-walled grid support, high-temperature alloy powder with a particle size of 15μm-53μm is used, the laser scanning power during printing is 180W-220W, the laser scanning rate is 1300mm / s-1500mm / s, and the laser scanning spacing is 0.1mm-0.12mm.

7. The 3D printing method for blade metal edging according to any one of claims 1 to 5, characterized in that: The heat treatment of the overall structure formed by the edge wrapping (5), the bottom support, the thin-walled grid support and the printing platform (4) comprises the following steps: S61: solution treatment: heating the overall structure from room temperature 25°C to 1000°C-1100°C for 3h-4h, and keeping the temperature at 1000°C-1100°C for 1h-2h. After the temperature keeping is completed, the overall structure is quickly cooled by air cooling or argon gas; S62: Aging treatment: The overall structure treated in step S61 is heated from room temperature 25°C to 700°C-800°C in 2h-3h, and kept at 700°C-800°C for 8h-9h. After the insulation is completed, the overall structure is furnace-cooled to 600°C-650°C for 2h, and kept at 600°C-650°C for 8h-9h. After the insulation is completed, the overall structure is cooled by air cooling or argon gas.

8. The 3D printing method for blade metal edging according to any one of claims 1 to 5, characterized in that: After removing the bottom support and the thin-walled grid support on the edge wrapping (5) in step S7, the following steps are also included: S8: grinding the stretching surface (12) and the two outer side surfaces (13) of the hemming (5).

9. The 3D printing method for blade metal edging according to any one of claims 1 to 5, characterized in that: The grinding allowance is 0.1 mm-0.15 mm.

10. The 3D printing method for blade metal edging according to any one of claims 1 to 5, characterized in that: The size error between the size of the printed edge wrapping (5) and the preset size is ±0.1 mm.

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