Supporting structure
By using a combined structure of plate-shaped support and grid support in laser selection melting forming technology, the problem of excessively high support height of the suspension structure of high-profile parts is easily broken and printing time is long, and a more efficient and lower-cost forming process is achieved.
Patent Information
- Application Number
- CN202420378046.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-02-28
AI Technical Summary
When using laser selection melting forming technology to form the suspended structure of high-protective parts, the height of the existing support structure is too high and prone to break, resulting in a long printing time, resulting in increased production costs.
A support structure is provided, including a plate-shaped support and a grid support. One end of the plate-shaped support is arranged on one side of the part body of the part near the suspension structure, and the other end is supported on the edge of the suspension structure far away from the part body, and the grid support is supported between the suspension structure and the plate-shaped support.
By reducing the height of the plate-shaped support, the strength of the support structure is enhanced to avoid breakage; the forming time of the support structure is shortened, the use of powder is reduced, and the production cost is reduced; the total volume of the grid support is small, the use of materials is low, and the cost is low, and the removal of the support structure is facilitated.
Smart Images
Figure CN222643251U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of laser selective melting forming, in particular to a supporting structure. Background Art
[0002] With the development of my country's aerospace industry, many key structures use high-boss components. The manufacturing cycle of high-boss components processed by traditional technology is long, which seriously hinders the development of models. At the same time, facing the increasingly stringent performance requirements of aircraft, many new and complex parts cannot be processed by traditional technology, and therefore cannot meet the performance or functional requirements of aircraft.
[0003] Laser selective melting forming technology is an advanced manufacturing technology based on the idea of discrete accumulation forming. This technology mainly uses special software to layer the three-dimensional model of the part, obtains the scanning data of each section, and uses the laser high-energy beam to selectively melt the preset metal powder layer by layer to directly manufacture three-dimensional solid parts of any complex shape. It can greatly reduce the manufacturing process and shorten the production cycle, especially in the forming of complex metal structural parts, and has broad application prospects in the upgrading of aerospace technology.
[0004] In the prior art, when using laser selective melting forming technology to form the suspended surface structure of high boss parts, the support structure used to support the suspended surface structure is often supported on a substrate. If the support height is too high, it is easy to break, and the printing time is long, which increases the production cost. Utility Model Content
[0005] The utility model aims to provide a support structure for solving the technical problems that when forming the existing support structure for supporting the suspended surface structure, the support height is too high and easy to break, the printing time is long, and the production cost is increased.
[0006] In order to achieve the above-mentioned purpose, the utility model provides a support structure for supporting the suspended surface structure of a part during the process of laser selective melting forming a part, the support structure comprises a plate support and a grid support, one end of the plate support is used to be arranged on a side of the part body of the part close to the suspended surface structure, and the other end of the plate support is used to support the edge of the suspended surface structure away from the part body. The grid support is supported between the suspended surface structure and the plate support.
[0007] When the above technical solution is adopted, one end of the plate-like support is used to be arranged on the side of the part body of the part close to the suspended surface structure, and the other end of the plate-like support is used to support the edge of the suspended surface structure away from the part body. At the same time, the grid support is supported between the suspended surface structure and the plate-like support, thereby supporting the suspended surface structure of the part to realize the laser selective melting forming of the suspended surface structure. In addition, since one end of the plate-like support provided by the utility model is arranged on the side of the part body of the part close to the suspended surface structure, when it is implemented, the support structure is formed from the part body, which can shorten the forming time of the support structure, reduce the amount of powder used in the support structure, and reduce the production cost compared with the situation in which the support structure is formed from the substrate in the prior art. In addition, the height of the plate-like support is reduced, the supporting strength of the support structure is enhanced, and the plate-like support is prevented from being broken due to excessive height. In addition, compared with the existing block support, the grid support has a smaller total volume, less materials are required in the forming process, and the cost is lower. Furthermore, the direct connection area between the plate-like support and the grid support and the suspended surface structure is smaller, and it is convenient to remove the support structure after the forming of the part is completed.
[0008] In a possible implementation, the two end edges of the plate-shaped support are serrated structures.
[0009] In a possible implementation manner, the sawtooth structure includes trapezoidal protrusions and triangular recesses that are alternately arranged.
[0010] In a possible implementation, the length of the top side of the trapezoidal protrusion is 1 mm-2 mm, and the length of the bottom side of the trapezoidal protrusion is 2 mm-4 mm; the angle between the two side walls of the triangular recess is 50°-70°.
[0011] In a possible implementation, the angle between the plate-shaped support and the horizontal direction is 50°-60°.
[0012] In a possible implementation, the thickness of the plate-shaped support is 0.5 mm-2 mm.
[0013] In a possible implementation, the grid support includes a plurality of strip mesh supports that are parallel to each other and arranged in an array, and the strip mesh supports extend in a vertical direction.
[0014] In a possible implementation, the length dimension of the cross section of the strip-shaped mesh support is 0.1 mm-1 mm, and the width dimension of the cross section of the strip-shaped mesh support is 0.1 mm-1 mm.
[0015] In a possible implementation manner, hollow holes are provided on the grid support. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0017] Figure 1 It is a structural schematic diagram of a part having a suspended surface structure;
[0018] Figure 2 A schematic diagram of the positional relationship between the support structure and parts provided in the embodiment of the utility model;
[0019] Figure 3 A schematic diagram of a plate-shaped support provided by an embodiment of the utility model;
[0020] Figure 4 A schematic top view of a grid support provided in an embodiment of the utility model.
[0021] Reference numerals:
[0022] 10-suspension structure, 20-part body;
[0023] 1- plate support, 11- trapezoidal protrusion, 12- triangular recess, 2- grid support. DETAILED DESCRIPTION
[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.
[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0029] Figure 1 The part with the overhanging structure 10 is shown in FIG. 1 , and is formed by using a laser selective melting forming device. Figure 1 When the part is shown in the figure, the forming direction of the part is determined according to the structure of the part. The forming direction of the part is as follows Figure 1 As shown. The forming device is provided with a substrate. When forming a part, the forming generally starts from the substrate, and the forming direction is perpendicular to the surface of the substrate. After determining the forming direction of the part, the hanging surface structure 10 to which a support structure is added is identified. The structure to which a support is added is now defined as the hanging surface structure 10, as shown in FIG. Figure 1 As shown, the suspension structure 10 is fixed on the part body 20. When the suspension structure 10 is formed by laser selective melting, it is necessary to first melt the support structure below the suspension structure 10, and the laser selective melting of the suspension structure 10 is achieved by supporting the suspension structure 10 by the support structure.
[0030] When the suspended surface structure 10 of a part is formed using the laser selective melting forming technology, the support structure used to support the suspended surface structure 10 is often supported on a substrate. If the support height is too high, there is a risk of support breakage during the forming process. At the same time, due to the high support height and large support amount, the printing time is significantly extended.
[0031] In order to solve the technical problems existing in the above-mentioned prior art, see Figure 2As shown, the embodiment of the utility model provides a support structure for supporting the suspension surface structure 10 of a part during the process of laser selective melting forming the part, the support structure comprises a plate support 1 and a grid support 2, one end of the plate support 1 is used to be arranged on a side of the part body 20 of the part close to the suspension surface structure 10, and the other end of the plate support 1 is used to support the edge of the suspension surface structure 10 away from the part body 20. The grid support 2 is supported between the suspension surface structure 10 and the plate support 1.
[0032] When the above technical solution is adopted, one end of the plate-like support 1 is used to be arranged on the side of the part body 20 of the part close to the suspended surface structure 10, and the other end of the plate-like support 1 is used to support the edge of the suspended surface structure 10 away from the part body 20. At the same time, the grid support 2 is supported between the suspended surface structure 10 and the plate-like support 1, thereby supporting the suspended surface structure 10 of the part to achieve the laser selective melting forming of the suspended surface structure 10. In addition, since one end of the plate-like support 1 provided by the utility model is arranged on the side of the part body 20 of the part close to the suspended surface structure 10, when it is specifically implemented, the support structure is formed from the part body 20. Compared with the situation in the prior art where the support structure is formed from the substrate, the forming time of the support structure can be shortened, the amount of powder used in the support structure can be reduced, and the production cost can be reduced. In addition, the height of the plate-like support 1 is reduced, the support strength of the support structure is enhanced, and the plate-like support 1 is prevented from being broken due to excessive height. In addition, compared with the existing block support, the grid support 2 has a smaller total volume, requires less material during the forming process, and has a lower cost. Furthermore, the direct connection area between the plate support 1 and the grid support 2 and the suspension surface structure 10 is smaller, so it is easy to remove the support structure after the part is formed. It can be seen that the support structure provided by the embodiment of the utility model can solve the problems that the suspension surface structure 10 of the high boss part is too high and prone to breakage, the printing time is long due to the large amount of support added, and the existing technical solutions will affect the accuracy of the post-processing parts, and effectively improve the forming quality and efficiency of laser selective melting.
[0033] In one possible implementation, see Figure 2 and Figure 3 As shown, the edges at both ends of the plate-like support 1 are serrated structures to avoid a large contact area between the plate-like support 1 and the suspension structure 10 and the part body 20, which makes it difficult to remove. At the same time, it avoids affecting the part accuracy when removing the plate-like support 1.
[0034] In one example, if Figure 3 As shown, the sawtooth structure includes alternately arranged trapezoidal protrusions 11 and triangular recesses 12 . The arrangement of the trapezoidal protrusions 11 ensures the supporting strength of the plate-shaped support 1 and improves the supporting stability of the suspended surface structure 10 .
[0035] For specific implementation, see Figure 3 As shown, the top side length L1 of the trapezoidal protrusion 11 is 1mm-2mm, the bottom side L2 of the trapezoidal protrusion 11 is 2mm-4mm, and the angle α between the two side walls of the triangular recess 12 is 50°-70°, which can make the sawtooth structure more stable. At the same time, the bottom of the triangular recess 12 can be smoothly connected with a rounded corner with a radius of 1mm. Exemplarily, L1 can be 1mm, 1.2mm, 1.5mm, 1.6mm, 1.8mm, 2mm, etc., L2 length can be 2mm, 2.4mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.5mm, 3.8mm, 4mm, etc., α can be 50°, 55°, 58°, 60°, 64°, 68°, 70°, etc., of course, this is just an example and is not a specific limitation. The size of the trapezoidal protrusion 11 can be adjusted according to the required strength. For example, when the lengths of L1 and L2 decrease, the contact area between the plate-mounted support and the part becomes smaller, and the ease of removal increases, but the support strength decreases accordingly. Therefore, the values of L1, L2 and α can be determined according to the actual situation of the part.
[0036] In an optional manner, the angle between the plate-like support 1 and the horizontal direction is 50°-60°, the plate-like support 1 contacts the edge of the suspended surface structure 10 away from the part body 20 and is connected to the wall of the part body 20 at a certain angle, and the angle between the plate-like support 1 and the horizontal direction can be 50°, 52°, 54°, 55°, 56°, 58°, 60°, etc., which can be adjusted according to the size of the suspended surface structure 10 that actually needs to be supported to ensure that the plate-like support 1 is formed.
[0037] As an optional method, the thickness of the plate-like support 1 is 0.5 mm-2 mm. In actual situations, the support strength and support stability of the plate-like support 1 can be adjusted by adjusting the thickness of the plate-like support 1. For example, the thickness of the plate-like support 1 can be 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2 mm, etc. Of course, this is only an example and is not a specific limitation.
[0038] In one possible implementation, see Figure 2 and Figure 4 As shown, the grid support includes a plurality of parallel and arrayed strip-shaped mesh supports, and the strip-shaped mesh supports extend in a vertical direction. In actual situations, the strip-shaped mesh supports may extend in a forming direction.
[0039] In some embodiments, the length dimension L3 of the cross section of the strip mesh support is 0.1mm-1mm, and the width dimension L4 of the cross section of the strip mesh support is 0.1mm-1mm. For example, the length dimension L3 of the cross section of the strip mesh support can be 0.1mm, 0.2mm, 0.4mm, 0.5mm, 0.8mm, 1mm, etc., and the width dimension L4 of the cross section of the strip mesh support can be 0.1mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, etc. Of course, this is just an example and is not a specific limitation. Different L3 and L4 values can be set to change the strength of the support. In addition, in order to avoid the difficulty of removing the powder in the mesh support 2 after laser selective melting, a hollow hole can be set on the mesh support 2 according to actual needs. The hollow hole can be a rectangular or diamond hollow to ensure the removal of the powder.
[0040] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.
[0041] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. A support structure, characterized in that: A suspension structure for supporting a part during the process of forming the part by laser selective melting, the support structure comprising: A plate-shaped support, one end of which is used to be arranged on a side of the part body of the part close to the hanging surface structure, and the other end of which is used to support an edge of the hanging surface structure away from the part body; A grid support is supported between the suspended surface structure and the plate-shaped support.
2. The support structure according to claim 1, characterized in that: The two end edges of the plate-shaped support are serrated structures.
3. The support structure according to claim 2, characterized in that: The sawtooth structure includes trapezoidal protrusions and triangular recesses that are alternately arranged.
4. The support structure according to claim 3, characterized in that: The length of the top side of the trapezoidal protrusion is 1mm-2mm, and the length of the bottom side of the trapezoidal protrusion is 2mm-4mm; the angle between the two side walls of the triangular recessed portion is 50°-70°.
5. The support structure according to claim 1, characterized in that: The angle between the plate-shaped support and the horizontal direction is 50°-60°.
6. The support structure according to claim 1, characterized in that: The thickness of the plate-shaped support is 0.5 mm-2 mm.
7. The support structure according to claim 1, characterized in that: The grid support comprises a plurality of strip-shaped mesh supports which are parallel to each other and arranged in an array, and the strip-shaped mesh supports extend in a vertical direction.
8. The support structure according to claim 7, characterized in that: The length dimension of the cross section of the strip-shaped mesh support is 0.1 mm-1 mm, and the width dimension of the cross section of the strip-shaped mesh support is 0.1 mm-1 mm.
9. The support structure according to claim 1, characterized in that: The grid support is provided with hollow holes.