Anti-deformation SLM (selective laser melting) process for plate-shaped component with framework

Abstract

The anti-deformation SLM process for the plate-shaped components with the framework comprises the following steps that S1, a plurality of plate-shaped components are arranged side by side; every two adjacent plate-shaped components are fixedly connected through a supporting rib, and the tail ends of the supporting ribs are connected to frameworks of the plate-shaped components so that the multiple plate-shaped components and the multiple supporting ribs can form an integral printing component, and printing is conducted with the printing component as an object. And S4, the supporting ribs remaining on each plate-shaped component are cut and removed, and the multiple plate-shaped components are obtained. A plurality of plate-shaped components can be printed at a time, the printing efficiency is improved, part deformation can be reduced, the coping amount after printing is reduced, and the product quality is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser 3D printing, and relates to an anti-deformation SLM process for plate-shaped components with skeletons. Background Art

[0002] SLM, namely selective laser melting technology. Products such as aircraft tail fins are generally plate-shaped components with skeletons, including a leading edge, a trailing edge, a rudder shaft, and two large planes on the left and right. There are radial stiffeners in the large planes. During the printing process, the internal stress is relatively large, resulting in serious deformation, and the subsequent straightening cost is too high.

[0003] In the prior art, for example, in the patent "A Support Device for Anti-Deformation of Skin-Skeleton Type Wing Surfaces for 3D Printing" with the publication number CN222077961U, such a device is to fixedly arrange a plurality of plate-shaped vertical ribs on the tail fin skin to increase the stiffness of the curved surface and reduce deformation. After the part is formed, these plate-shaped vertical ribs are polished and removed. Due to the large number of plate-shaped vertical ribs, the grinding amount is large, which is time-consuming and laborious, and it is also easy to cause secondary deformation of the part. Summary of the Invention

[0004] In order to overcome the deficiencies in the background art, the present invention provides an anti-deformation SLM process for plate-shaped components with skeletons. The purpose is to arrange a plurality of plate-shaped components side by side and then fixedly connect them into a whole, change the thickness of the printed component, thereby improving the stiffness, reducing deformation, dividing the plurality of plate-shaped components after forming, reducing the grinding amount, reducing the cost, and improving the efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: An anti-deformation SLM process for plate-shaped components with skeletons, comprising the following steps:

[0006] S1: Arrange a plurality of plate-shaped components side by side; connect adjacent two plate-shaped components through support ribs, and the ends of the support ribs are connected to the skeletons of the plate-shaped components, so that the plurality of plate-shaped components and the plurality of support ribs form an integral printed component, and perform SLM printing on the printed component as an object;

[0007] S2: Heat-treat the printed component obtained in step S1 together with the substrate to eliminate the stress during the printing process;

[0008] S3: After the printed component passes through step S2, cut the support ribs in the middle of adjacent two plate-shaped components by wire cutting;

[0009] S4: Cut and remove the remaining support ribs on each plate-shaped component to obtain a plurality of the plate-shaped components.

[0010] As a further optimization, in step S1, the plurality of plate-shaped components are arranged vertically side by side.

[0011] As a further optimization, the number of the plurality of plate-shaped components is two.

[0012] As a further optimization, each of the support ribs includes two intersecting rib plates; the plurality of support ribs are evenly distributed at intervals up and down, and the end of each rib plate is connected to the framework of the plate-shaped component.

[0013] As a further optimization, the included angle between each rib plate and the horizontal plane is greater than 45°.

[0014] As a further optimization, it further includes step S5; S5: grinding and shaping the plate-shaped component obtained in step S4, and then performing sandblasting to obtain the finished product of the plate-shaped component.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention can print multiple plate-shaped components at one time, improving the printing efficiency, and can reduce the deformation of parts, reduce the grinding amount after printing, and improve the product quality. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the tail wing of the embodiment of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the first type of support rib of the embodiment of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of the second type of support rib of the embodiment of the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the third type of support rib of the embodiment of the present invention.

[0020] The corresponding relationship between the technical features in the figure and the reference numerals is: wing plate 1; rudder shaft 2; leading edge part 3; trailing part 4; framework 5; support rib 6; rib plate 61. Detailed Embodiments

[0021] Next, in combination with the drawings of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some preferred embodiments of the present invention, rather than all embodiments. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0022] Embodiment: Please refer to Figures 1-4The present invention provides the following technical solution: an anti-deformation SLM process for a plate-shaped component with a skeleton. Taking an aircraft tail wing product as an example, the wing plate 1 is a flat plate, including a rudder shaft 2 at the lower part, a leading edge part 3 at the front end, and a rear tail part 4 at the rear end. The radiation-mounted skeleton 5 is dispersed in the tail wing with the rudder shaft 2 as a reference. Since the leading edge part 3 is thicker and machining is required later, when viewed from the side, the skeleton 5 is located at the middle position of the leading edge part 3. The process includes the following steps:

[0023] S1: Arrange multiple plate-shaped components side by side; adjacent two plate-shaped components are fixedly connected by a support rib 6, and the end of the support rib 6 is connected to the skeleton 5 of the plate-shaped component, so that multiple plate-shaped components and multiple support ribs 6 form an integral printing component, and the printing component is used as an object for printing;

[0024] S2: Heat-treat the printing component obtained in step S1 together with the substrate to eliminate the stress during the printing process;

[0025] S3: After the printing component goes through step S2, the support rib 6 between adjacent two plate-shaped components is cut by wire cutting;

[0026] S4: Cut and remove the remaining support ribs 6 on each plate-shaped component to obtain multiple plate-shaped components. During wire cutting, first cut the support ribs between every two products, and then perform wire cutting on the whole plate of products to prevent the products cut first during wire cutting from pulling and deforming another product through the support ribs.

[0027] In a preferred manner, multiple plate-shaped components are arranged vertically side by side. Printing vertically, the printing component is heated evenly, reducing deformation. In this embodiment, two plate-shaped components are taken as an example, and 3, 4 or more plate-shaped components can also be arranged for printing together according to needs. Thus, the plate-shaped printing component is transformed into a solid printing component, reducing deformation and also improving the printing efficiency.

[0028] Among them, the structure of the support rib 6 can have various forms. In this embodiment, preferably, as Figure 2 shown, the support rib 6 includes two intersecting rib plates 61; multiple support ribs 6 are evenly distributed at intervals up and down, and the end of each rib plate 61 is connected to the skeleton 5 of the plate-shaped component. More preferably, the angle between each rib plate 61 and the horizontal plane is greater than 45°, which can provide sufficient lateral support force and reduce deformation. Figure 3 The support rib 6 of is in a straight shape, with a large lateral support force, but it is easy to form a cantilever structure during printing, and it is suitable for the situation where the thickness of the plate-shaped component is small and the interval is small. Figure 4The supporting rib 6 is in a corrugated shape formed by alternately inclined rib plates 61. Although it can avoid the cantilever structure, the supporting force is weak. In a preferred method, after the plate-shaped component obtained in step S4 is polished and shaped, sandblasting is carried out to ensure the product precision, so as to remove burrs and the traces at the connection of the supporting rib 6, and the final finished product of the plate-shaped component is obtained.

[0029] The advantages of this embodiment are as follows: compared with the prior art, when comparing the printed finished product of a single tail wing, during the printing process of a single tail wing, the internal stress is large, resulting in serious deformation of the two large flat surfaces, which is between 0.8 mm and 1 mm. For the tail wing printed finished product obtained by the method of this embodiment (printing two tail wings simultaneously), the deformation amount is reduced to 0.1 mm to 0.3 mm. On the one hand, the deformation amount is greatly reduced, improving the product quality. On the other hand, multiple tail wings can be produced by one printing, improving the production efficiency.

[0030] The parts not detailed in the present invention are the prior art. For those of ordinary skill in the art, the technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A SLM process for preventing deformation of plate-shaped parts with a skeleton, characterized in that: The steps include: S1: multiple plate-shaped components are arranged side by side; two adjacent plate-shaped components are fixedly connected by support ribs (6), and the ends of the support ribs (6) are connected to the skeleton (5) of the plate-shaped components, so that the multiple plate-shaped components and the multiple support ribs (6) form an integral printing component, and SLM printing is performed with the printing component as the object; S2: heat-treating the printed component obtained in step S1 together with the substrate to eliminate stress during the printing process; S3: After the printed component has passed step S2, the support ribs (6) between two adjacent plate-shaped components are cut by wire cutting; S4: After step S3, the remaining support ribs (6) on each of the plate-shaped components are cut and removed to obtain a plurality of the plate-shaped components.

2. The anti-deformation SLM process for plate-shaped components with a skeleton according to claim 1, characterized in that: In step S1, a plurality of the plate-shaped components are arranged vertically side by side.

3. The anti-deformation SLM process for plate-shaped components with a skeleton according to claim 2, characterized in that: The number of the plurality of plate-shaped components is two.

4. The SLM process for preventing deformation of plate-shaped components with a skeleton according to claim 2, characterized in that: Each of the supporting ribs (6) comprises two intersecting rib plates (61); a plurality of the supporting ribs (6) are evenly spaced up and down, and the end of each rib plate (61) is connected to the frame (5) of the plate-shaped component.

5. The anti-deformation SLM process for plate-shaped components with a skeleton according to claim 4 is characterized in that: The angle between each rib plate (61) and the horizontal plane is greater than 45°.

6. The SLM process for preventing deformation of plate-shaped components with a skeleton according to claim 1, characterized in that: Also includes step S5; S5: Grinding and reshaping the plate-shaped component obtained in step S4, and then sandblasting to obtain the finished plate-shaped component.

Images