Vibration reduction structure for binder spraying additive manufacturing

Abstract

The utility model discloses a vibration reduction structure manufactured through binder spraying additive manufacturing, and relates to the technical field of structural vibration reduction, the vibration reduction structure comprises a vibration reduction body made of existing metal, metal alloy or metal-based composite materials, and the vibration reduction body is of a novel three-period tiny curved surface porous structure; and through the synergistic effect of the structure and the material, the failure problem can be well solved, so that the excellent vibration reduction performance is stably exerted. The novel extremely-small-curved-surface porous structure is formed by periodically arraying extremely-small-curved-surface structure units in the x direction, the y direction and the z direction, has the advantages of being light in weight and high in strength, and is beneficial to achieving light weight of materials. In addition, according to the vibration reduction body, integrated preparation of structural materials in complex shapes can be achieved through a binder spraying additive manufacturing process.

Description

Technical Field

[0001] This application relates to the field of structural vibration reduction technology, and in particular to a vibration reduction structure manufactured by adhesive spraying additive manufacturing. Background Technology

[0002] Vibration damping materials play a crucial role in engineering applications, ranging from conventional structural components to applications in various harsh environments. Taking the extreme application of rockets during launch and orbit insertion as an example, factors such as changes in rocket engine thrust, mass changes due to fuel consumption, and aerodynamic effects during flight can induce low-frequency vibrations over extended periods. These vibrations significantly impact the stability of the rocket structure. To ensure the safety and reliability of rockets, strict control of low-frequency vibrations is essential.

[0003] Traditional vibration reduction methods often employ composite materials and organic polymers. While these materials offer excellent vibration isolation and reduction performance, they can fail under harsh environmental conditions such as high temperatures, low temperatures, vacuum, and acid / alkali environments. For example, some composite materials may undergo thermal decomposition or performance degradation at high temperatures. In the pursuit of more stable and efficient structural vibration reduction, these traditional methods are clearly insufficient to meet the vibration control requirements under severe conditions. Utility Model Content

[0004] In view of this, this application provides a vibration damping structure manufactured by adhesive spraying additive manufacturing, which solves the problem of vibration damping failure in general application environment and harsh environment through the synergistic effect of structure, materials and manufacturing process.

[0005] The specific technical solution adopted is as follows:

[0006] A vibration damping structure manufactured by binder spraying additive manufacturing includes a damping body, which is a three-period minimal surface porous structure. The three-period minimal surface porous structure is formed by periodically arranging minimal surface structural units along the x, y, and z directions. The functional expression of the minimal surface structural unit is as follows:

[0007] 2sin(2πx)sin(2πy)+2sin(2πy)sin(2πz)+2sin(2πx)sin(2πz)+cos(2πx)cos(2πy)=c

[0008] Where x, y, z are spatial rectangular coordinates, and c is a horizontal control parameter that controls the porosity of the structural unit.

[0009] Preferably, the range of the horizontal control parameter c is 0.05-1.2.

[0010] Preferably, the vibration damping structure further includes an upper plate and a lower plate, with the damping body located between the upper plate and the lower plate.

[0011] More preferably, the upper plate, the vibration damper, and the lower plate are integrally formed.

[0012] More preferably, when the thickness of the damping body is H, the thickness of both the upper plate and the lower plate is 0.01H to 0.2H.

[0013] Preferably, the material of the vibration damper is at least one of metal, metal alloy or metal matrix composite.

[0014] More preferably, the metal alloy includes at least one selected from aluminum alloy, magnesium alloy, nickel-titanium alloy, iron alloy, zinc alloy, or copper alloy.

[0015] More preferably, the metal matrix composite material includes at least one of titanium carbide reinforced aluminum alloy, titanium nitride reinforced aluminum alloy, or titanium carbide reinforced iron alloy, and the metal matrix composite material can be prepared by ball milling and mixing the corresponding ceramic powder and metal powder.

[0016] Preferably, the vibration damping structure is integrally formed by adhesive jet printing, and then prepared by curing, degreasing, sintering or melt infiltration heat treatment.

[0017] The beneficial effects of this application are:

[0018] 1) Compared with traditional vibration reduction materials, this application uses existing metal, metal alloy or metal matrix composite materials that can cope with general working conditions and harsh environmental conditions, which can effectively solve the failure problem and thus stably exert its excellent vibration reduction performance.

[0019] 2) The inherent porous and periodic characteristics of the three-period minimal curved surface porous structure can play a good role in vibration reduction; at the same time, it also has the characteristics of being lightweight and high-strength, which helps to achieve material lightweighting.

[0020] 3) This vibration damping structure can be fabricated in an integrated manner using existing adhesive spraying additive manufacturing processes to achieve complex-shaped structural materials. Attached Figure Description

[0021] Figure 1 This is a three-dimensional rendering of the vibration-damping structure manufactured by adhesive spraying additive manufacturing according to the present invention.

[0022] Figure 2 yes Figure 1 A rendering from the main viewpoint.

[0023] Figure 3 yes Figure 1 The side view rendering.

[0024] Figure 4 This is a three-dimensional rendering of the extremely small curved surface structural unit described in this utility model.

[0025] Figure 5 yes Figure 4 A rendering from the main viewpoint.

[0026] Figure 6 yes Figure 4 The side view rendering.

[0027] Figure 7 This is a 3D rendering of an existing Diamond-type vibration damping structure manufactured using adhesive spraying additive manufacturing.

[0028] Figure 8 This is a 3D rendering of an existing Primitive-type vibration damping structure manufactured using adhesive spraying additive manufacturing.

[0029] Figure 9 These are the results of vibration reduction performance tests.

[0030] In the diagram: 1. Upper plate, 2. Vibration damper, 3. Lower plate, 4. Minimal curved surface structural unit. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] See Figures 1 to 3 This embodiment provides a vibration damping structure manufactured by adhesive spraying additive manufacturing, including a vibration damper 2, which is a three-period minimal curved surface porous structure. The vibration damper is made of at least one of existing metals, metal alloys, or metal-based composite materials. The vibration damping structure also includes an upper plate 1 and a lower plate 3, with the vibration damper 2 located between the upper plate 1 and the lower plate 3. The three parts are integrally formed and tightly connected.

[0033] Combination Figures 4 to 6 As shown, the three-period minimal surface porous structure of the damper 2 is formed by periodically arranging minimal surface structural units 4 along the x, y, and z directions.

[0034] In this embodiment, the function expression corresponding to the minimal surface structure unit 4 is as follows:

[0035] 2sin(2πx)sin(2πy)+2sin(2πy)sin(2πz)+2sin(2πx)sin(2πz)+cos(2πx)cos(2πy)=c

[0036] Where x, y, and z form a spatial rectangular coordinate system, and c is a horizontal control parameter ranging from 0.05 to 1.2. By adjusting the horizontal control parameter c, the porosity of the vibration damper can be controlled.

[0037] In this embodiment, the vibration damping structure includes a total of 2×6×2 arrays of three-period minimal curved surface porous structures. The size of each minimal curved surface structural unit is 3×3×3mm, the horizontal control parameter is 0.68, the porosity of the structural unit is controlled at 75%, and the thickness of the upper plate 1 and the lower plate 3 is 0.5mm.

[0038] like Figure 2 and Figure 3 The vibration damper designed in this application has four wavy sides. Besides the porous structure between the wavy sections, the wavy structure itself also has a porous structure. This combination of wavy and porous structures allows the vibration damper to maintain a certain strength while achieving excellent energy absorption and vibration reduction. Furthermore, for Figure 1 The structure shown in this application has a cell size of 3×3×3mm and contains 2×6×2 cells, with a surface area of ​​3678mm². 2 It is significantly better than Figure 7 and Figure 8 The Diamond structure shown has the same porosity, cell size, and number of cells (1714 mm). 2 ) and Primitive structure (1076mm) 2 Generally, an increase in surface area provides more interfaces or pathways for energy dissipation, thus contributing to energy dissipation and implying better vibration damping performance.

[0039] In order for the damping body located in the middle to play a good role in damping, the thickness of the upper plate and the lower plate is preferably 0.01-0.02 times the thickness of the damping body.

[0040] Because the three-period minimal curved porous structure of the vibration damper has a complex shape and is difficult to manufacture using traditional processes, it is formed using existing binder spray additive manufacturing technology.

[0041] In this embodiment, the vibration damper is made of nickel-titanium alloy, which is prepared by using raw alloy powder material and processing it through existing adhesive spray printing, curing, degreasing, and sintering.

[0042] Depending on the application environment, the material of the vibration damper may include, but is not limited to, high-temperature and corrosion-resistant materials such as stainless steel, high-temperature alloys, high-entropy alloys, and refractory metals. In other embodiments, the material of the vibration damper may also be other existing metals, metal alloys, or metal-based composite materials. Other metal alloys include at least one of aluminum alloys, magnesium alloys, iron alloys, zinc alloys, or copper alloys. Other metal-based composite materials include at least one of titanium carbide-reinforced aluminum alloys, titanium nitride-reinforced aluminum alloys, or titanium carbide-reinforced iron alloys. The metal-based composite material can be prepared by ball milling and mixing appropriate ceramic powders with metal powders.

[0043] The vibration damping body and the vibration damping structure including the upper plate, lower plate and vibration damping body described in this application can all be integrally formed by adhesive spray printing, and then prepared by curing, degreasing, sintering or melt infiltration heat treatment.

[0044] The materials and manufacturing processes used in this application are all existing and do not involve any improvement to the materials and manufacturing processes.

[0045] Comparative Example 1

[0046] A vibration damping structure manufactured by binder spraying additive manufacturing includes an upper plate, a lower plate, and a damping body. The damping body, upper plate, and lower plate are all made of nickel-titanium alloy powder. The damping body is an existing Diamond-type three-period minimal surface porous structure. The three-period minimal surface porous structure is formed by periodically arranging minimal surface structural units along the x, y, and z directions. The functional expression corresponding to the minimal surface structural unit is as follows: sin(2πx)sin(2πy)sin(2πz)+sin(2πx)cos(2πy)cos(2πz)+cos(2πx)sin(2πy)cos(2πz)+cos(2πx)cos(2πy)sin(2πz)=c

[0047] Where x, y, z are spatial rectangular coordinates, and c is the horizontal control parameter.

[0048] In this comparative example, the vibration damper contains a total of 2×6×2 arrays of three-period minimal curved surface porous structures. Each minimal curved surface structural unit has dimensions of 3×3×3 mm. The horizontal control parameter c is 0.31, controlling the porosity of the structural unit to be 75%. The thickness of both the upper plate 1 and the lower plate 3 is 0.5 mm. Figure 7 As shown.

[0049] The final sample is prepared by using existing adhesive jet printing, curing, degreasing, and sintering processes.

[0050] Comparative Example 2

[0051] A vibration damping structure manufactured by binder spraying additive manufacturing includes an upper plate, a lower plate, and a damping body. The damping body, upper plate, and lower plate are all made of nickel-titanium alloy powder. The damping body is a multi-layer structure with a core of an existing Primitive-type three-period minimal surface porous structure. The three-period minimal surface porous structure is formed by periodically arranging minimal surface structural units along the x, y, and z directions. The functional expression corresponding to the minimal surface structural unit is as follows:

[0052] cos(2πx)+cos(2πy)+cos(2πz)=c

[0053] Where x, y, z are spatial rectangular coordinates, and c is the horizontal control parameter.

[0054] In this comparative example, the vibration damper contains a total of 2×6×2 arrays of three-period minimal curved surface porous structures. Each minimal curved surface structural unit has dimensions of 3×3×3 mm. The horizontal control parameter c is 0.44, controlling the porosity of the structural unit to be 75%. The thickness of both the upper plate 1 and the lower plate 3 is 0.5 mm. Figure 8 As shown.

[0055] The final sample is prepared by using existing adhesive jet printing, curing, degreasing, and sintering processes.

[0056] To characterize the vibration damping performance of the aforementioned adhesive-sprayed additive manufacturing structure, dynamic thermomechanical analysis (DMA) experiments were performed on the samples obtained in the examples and comparative examples. The experimental frequency was 1 Hz, and the experimental temperature ranged from 25 to 150°C. The strength of the vibration damping performance was measured using the damping factor (tanδ), with a larger tanδ value indicating better vibration damping performance. The experimental results of the vibration damping structure are as follows: Figure 9 As shown, compared with existing multi-layer structures with a core of Diamond and Primitive type three-period minimal curved porous structures, the innovative structure designed in this application has a larger tanδ value, which means better vibration reduction performance.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vibration damping structure manufactured by adhesive spraying additive manufacturing, comprising a vibration damping body, characterized in that: The damping body is a three-period minimal surface porous structure, which is formed by periodically arranging minimal surface structural units along the x, y, and z directions; the functional expression of the minimal surface structural unit is as follows: 2sin(2πx)sin(2πy)+2sin(2πy)sin(2πz)+2sin(2πx)sin(2πz)+cos(2πx)cos(2πy)=c Where x, y, z are spatial rectangular coordinates, and c is a horizontal control parameter that controls the porosity of the structural unit.

2. The vibration damping structure manufactured by adhesive spraying additive manufacturing according to claim 1, characterized in that: The range of the horizontal control parameter c is 0.05-1.

2.

3. The vibration damping structure manufactured by adhesive spraying additive manufacturing according to claim 1, characterized in that: It also includes an upper plate and a lower plate, with the damper located between the upper plate and the lower plate.

4. The vibration damping structure manufactured by binder spraying additive manufacturing according to claim 3, characterized in that: The upper plate, the vibration damper, and the lower plate are integrally formed.

5. The vibration damping structure manufactured by binder spraying additive manufacturing according to claim 3, characterized in that: When the thickness of the damper is H, the thickness of both the upper plate and the lower plate is 0.01H~0.2H.

6. The vibration damping structure manufactured by adhesive spraying additive manufacturing according to claim 1, characterized in that: The vibration damper is made of one of the following materials: metal, metal alloy, or metal matrix composite.

7. The vibration damping structure manufactured by adhesive spraying additive manufacturing according to claim 6, characterized in that: The metal alloy includes one of aluminum alloy, magnesium alloy, nickel-titanium alloy, iron alloy, zinc alloy, or copper alloy.

8. The vibration damping structure manufactured by adhesive spraying additive manufacturing according to claim 6, characterized in that: The metal matrix composite material includes one of titanium carbide reinforced aluminum alloy, titanium nitride reinforced aluminum alloy, or titanium carbide reinforced iron alloy.

9. The vibration damping structure manufactured by binder spraying additive manufacturing according to claim 1 or 3, characterized in that: The vibration damping structure is integrally formed by adhesive jet printing, and then prepared by curing, degreasing, sintering or melt infiltration heat treatment.

Images