A honeycomb-like vibration damping structure of acoustic black hole features, method of manufacture and method of use

Abstract

The application discloses a kind of acoustic black hole features honeycomb-like damping structure, preparation method and use method, belong to cutting processing damping field, acoustic black hole features honeycomb-like damping structure includes acoustic black hole features interlayer main body, inner filling viscoelastic material layer, upper layer plate and lower layer plate;Interlayer main body is formed by four acoustic black hole power law characteristics edge envelope single grid, and damping is realized by the structural characteristics of acoustic black hole thickness decrement;Multi-grid is freely combined in length and width direction, and forms honeycomb-like;Inner filling foam, rubber and other viscoelastic materials increase the damping of honeycomb-like acoustic black hole grid, dissipate vibration energy;Upper layer plate and lower layer plate are covered on acoustic black hole honeycomb-like grid by welding or adhesive mode, for maintaining the contact of acoustic black hole features grid and inner filling viscoelastic material and the basic form fixed.The application has the characteristics such as flexible and free structure damping, use.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of cutting vibration control, and particularly relates to an acoustic black hole characteristic honeycomb-like damping structure, a preparation method and a use method BACKGROUND

[0002] In the milling process, due to the influence of cutting force, machine tool vibration and other factors, the workpiece often vibrates, which not only affects the machining precision and surface quality of the workpiece, but also may cause the tool to wear out, and even affect the service life of the machine tool. Therefore, it has important practical application value to carry out damping treatment on the workpiece to reduce the influence of vibration on the machining process. At present, there are some damping technologies on the market, such as magneto-rheological damper, mass tuned damper, etc. These technologies can reduce vibration to some extent, but have problems such as complex structure, narrow use frequency band, etc. Therefore, it has become a problem to be solved in the field of mechanical processing to develop a damping structure with simple structure, low cost, wide damping frequency band and strong applicability. SUMMARY

[0003] In view of the existing problems, the present application provides an acoustic black hole characteristic honeycomb-like damping structure, a preparation method and a use method, which are used to solve the vibration problem of the workpiece during processing.

[0004] To achieve the above technical purposes, the technical scheme adopted by the present application is:

[0005] An acoustic black hole characteristic honeycomb-like damping structure, comprising an acoustic black hole characteristic interlayer main body, an inner filling viscoelastic material layer, an upper layer plate and a lower layer plate; the interlayer main body is a honeycomb-like structure composed of a plurality of grids freely combined in length and width directions, each grid is composed of four edges with acoustic black hole power law characteristics, the inner filling viscoelastic material layer is filled in the grid to increase the damping of the grid, and the upper layer plate and the lower layer plate are fixed on the upper surface and the lower surface of the interlayer main body respectively.

[0006] To optimize the technical scheme, further improvements are taken as follows:

[0007] 1. The power function characteristic equation of the edge with acoustic black hole power law characteristics is y=ax ε , wherein a is a constant, x is the base number of the power function, and ε is the index of the power function.

[0008] When the grid size is greater than 100 mm, the grid selects a small power law and a large constant a value, wherein the numerical range of the small power law is 2<ε<2.5, and the numerical range of the large constant a value is a>1; when the grid size is less than or equal to 100 mm, the grid selects a large power law and a small constant a value, wherein the numerical range of the large power law is 2.5≤ε<3, and the numerical range of the small constant a value is a≤1.

[0009] The above-mentioned grid is uniformly distributed in length and width directions.

[0010] The above-mentioned sandwich body has multiple layers of grids in the width direction, and the adjacent layers of grids have a spacing of no less than 0.5 mm.

[0011] The material used for the above-mentioned inner filling viscoelastic material layer is foam or rubber.

[0012] The material of the above-mentioned upper plate and lower plate is aluminum alloy or resin or the same as that used for the sandwich body.

[0013] A preparation method of the acoustic black hole characteristic honeycomb-like damping structure, the preparation of the above-mentioned acoustic black hole characteristic honeycomb-like damping structure, the specific method is: the lower plate is fixed with the lower surface of the sandwich body, the inner filling viscoelastic material layer is filled into the grid of the sandwich body, and then the upper plate is fixed on the upper surface of the sandwich body, forming the acoustic black hole characteristic honeycomb-like damping structure.

[0014] The upper plate and the lower plate are fixed on the upper and lower surfaces of the sandwich body by gluing or welding.

[0015] A use method of the acoustic black hole characteristic honeycomb-like damping structure, when the workpiece is machined, the above-mentioned acoustic black hole characteristic honeycomb-like damping structure is installed in the non-machining area of the workpiece.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1、The acoustic black hole characteristic honeycomb-like damping structure provided by the present application combines the damping and noise reduction characteristics of acoustic black holes and the damping characteristics of viscoelastic materials, is used in the field of machining damping, can effectively reduce the chatter phenomenon in machining, and improves the surface quality of machining.

[0018] 2、The acoustic black hole characteristic honeycomb-like damping structure provided by the present application can be arbitrarily combined in length and width directions to form different sizes and adapt to different machining occasions. DETAILED DESCRIPTION

[0019] Figure 1 is a structural schematic diagram of the acoustic black hole characteristic sandwich body;

[0020] Figure 2 is a structural schematic diagram of the acoustic black hole characteristic honeycomb-like damping structure;

[0021] Figure 3 is a structural schematic diagram of the acoustic black hole characteristic honeycomb-like damping structure in the first embodiment;

[0022] Figure 4is a structural schematic diagram of a second implementation of a honeycomb-like vibration reduction structure which is an acoustic black hole feature.

[0023] Marked names in the figure: honeycomb-like vibration reduction structure 1, upper layer plate 11, interlayer main body 12, lower layer plate 13, inner filling viscoelastic material layer 14, workpiece processing equipment 2, workpiece 21, vice 22, workbench 23, clamp 24. DETAILED DESCRIPTION

[0024] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is described and explained below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0025] Obviously, the drawings described below are only some examples or embodiments of the present application, and for those of ordinary skill in the art, the present application can be applied to other similar scenarios without creative labor on the basis of these drawings. In addition, it can be understood that although the efforts made in this development process can be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacture or production changes based on the technical content disclosed in the present application are only routine technical means and should not be understood as insufficient disclosure of the present application.

[0026] In the present application, "embodiment" means that the specific features, structures or properties described in combination with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in the present application can be combined with other embodiments without conflict.

[0027] Unless otherwise defined, technical terms and scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terms "a", "an", "one", "this", and the like, as used in the present application, do not denote a limitation of quantity and can be used to describe one or more. The terms "including", "containing", "having", and the like, as used in the present application, are meant to encompass the presence of one or more of the stated steps or elements, but not preclude the presence of additional steps or elements. The terms "connected", "coupled", "attached", and the like, as used in the present application, are meant to encompass a direct connection or coupling between elements, as well as an indirect connection or coupling between elements, whether through a direct or indirect connection or coupling. The terms "a plurality" or "a number of" mean two or more. The term "and / or" describes associated objects, which means that there can be three cases, for example, "A and / or B" can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects. The terms "first", "second", "third", and the like, as used in the present application, are merely used to distinguish similar objects, and do not represent a specific order of the objects.

[0028] As shown in Figure 1 The present application provides a honeycomb-like acoustic black hole structure, which is characterized by a power-law acoustic black hole sandwich body 12 enclosed by four power-law curves. The length and width of the sandwich body can be combined in any way to form different sizes, suitable for different application scenarios.

[0029] As shown in Figure 2 The present application provides a honeycomb-like acoustic black hole structure, which includes an upper layer plate 11, an acoustic black hole sandwich body 12, a lower layer plate 13, and an inner filling viscoelastic material layer 14. The inner filling viscoelastic material layer 14 is filled with foam or rubber into the grid of the acoustic black hole sandwich body 12 to increase the damping of the honeycomb-like acoustic black hole grid and dissipate vibration energy. The upper layer plate 11 and the lower layer plate 13 are fixed on the upper and lower surfaces of the acoustic black hole sandwich body 12 by means of gluing or welding, to maintain the contact and basic form of the acoustic black hole grid and the inner filling viscoelastic material, and form the honeycomb-like acoustic black hole structure.

[0030] Specifically, during installation, the lower layer plate 13 is first fixed with the acoustic black hole sandwich body 12 to form a structure enclosed by the acoustic black hole power-law grid and the lower layer plate 13, the inner filling viscoelastic material layer 14 is then poured into the structure, and finally the upper layer plate 11 is fixed on the main structure to form the honeycomb-like acoustic black hole structure.

[0031] The sandwich body 12 of the acoustic black hole feature is surrounded by four curves with acoustic black hole power law characteristics, and the power function characteristic equation is y=ax ε , wherein the selection of the power function is determined by the geometric size of the acoustic black hole grid. A large-size grid selects a small power law and a large constant a value, and a small-size grid selects a large power law and a small constant a value.

[0032] In the acoustic black hole honeycomb-like grid structure, the lower half of the envelope line of the upper grid and the upper half of the envelope line of the lower grid in the width direction do not intersect, and there is a certain thickness between the two, wherein the thickness should be less than 0.5mm, which reduces the processing difficulty of the structure while ensuring the vibration reduction effect of the acoustic black hole structure.

[0033] The upper plate 11 and the lower plate 13 adopt the same material as the acoustic black hole feature. For applications that do not require lightweight structures, aluminum alloy is used, and the acoustic black hole feature sandwich body 12 is connected together by welding. For applications that require lightweight use, resin 3D printing is used, and the acoustic black hole feature sandwich body 12 is connected together by gluing.

[0034] One of the installation and use methods of the acoustic black hole feature honeycomb-like damping structure is to process the upper surface of the workpiece 21, and the workpiece 21 is clamped by the vice 22 at both ends and placed on the workbench 23, as shown in Figure 3 , when in use, the acoustic black hole feature honeycomb-like damping structure is installed on the lower surface of the workpiece 21 to avoid affecting the processing of the upper surface of the workpiece 21.

[0035] In the clamping mode of the workpiece 21 suspended in the middle, the upper plate 11 of the acoustic black hole feature honeycomb-like damping structure is fixed on the non-processing surface of the workpiece 21 by gluing or welding. In the clamping mode of the workpiece 21 clamped at both ends and placed flat in the middle, the acoustic black hole feature honeycomb-like damping structure is installed between the workbench 23 and the workpiece 21. The lower plate 13 of the acoustic black hole feature honeycomb-like damping structure is in contact with the table surface of the workbench 23, and the upper plate 11 is in contact with the non-processing surface of the workpiece 21. At this time, in order to ensure the installation accuracy of the workpiece 21, do not use gluing to fix it. Before clamping, the workpiece 21 is weighted or pressurized to make the acoustic black hole feature honeycomb-like damping structure tightly contact with the table surface of the workbench 23 and the workpiece 21, and then the workpiece 21 is fixed by using the clamp.

[0036] In particular, the size of the acoustic black hole feature honeycomb-like damping structure can be designed according to the actual working condition, and adjusted in the length and width directions to adapt to the size of the workpiece 21, such as Figure 3As shown, under the clamping condition, the workpiece 21 is fixed on the workbench 23 by the clamp 24, and the workpiece 21 is partially machined, at this time, the honeycomb-like damping structure with acoustic black hole features is fixed on the non-machining area of the upper surface of the workpiece 21 by means of gluing or welding, the lower plate 13 of the honeycomb-like damping structure with acoustic black hole features is fixed with the non-machining area of the upper surface of the workpiece 21, and the machining vibration of the workpiece 21 is reduced.

[0037] One of the installation and use methods of the honeycomb-like damping structure with acoustic black hole features is to machine part of the upper surface of the workpiece 21, as shown in the figure. Figure 4 As shown, the workpiece 21 is fixed on the workbench 23 by the clamp 24, and the workpiece 21 is partially machined, at this time, the honeycomb-like damping structure with acoustic black hole features is fixed on the non-machining area of the upper surface of the workpiece 21 by means of gluing or welding, the lower plate 13 of the honeycomb-like damping structure with acoustic black hole features is fixed with the non-machining area of the upper surface of the workpiece 21, and the machining vibration of the workpiece 21 is reduced.

[0038] In particular, the shape of the honeycomb-like damping structure with acoustic black hole features can be specially designed for the non-machining area of the upper surface of the workpiece 21, and is not limited to a rectangular shape, and can be designed as an L shape or a back-to-back shape, etc. according to the machining area, and for a complex curved surface workpiece 21, it can be designed to follow, and is fixed in the non-machining area of the workpiece 21 by means of gluing or welding without affecting the installation accuracy of the workpiece 21.

[0039] The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall be considered as the protection scope of the present application.

Claims

1. A honeycomb-like vibration damping structure with acoustic black hole characteristics, characterized by: The structure includes a sandwich body (12) with acoustic black hole characteristics, an inner viscoelastic material layer (14), an upper plate (11), and a lower plate (13). The sandwich body (12) is a honeycomb-like structure composed of multiple grids that can be freely combined in the length and width directions. Each grid is enveloped by four edges that have acoustic black hole power-law characteristics. The inner viscoelastic material layer (14) is filled in the grid to increase the damping of the grid. The upper plate (11) and the lower plate (13) are fixed to the upper and lower surfaces of the sandwich body (12), respectively. The power function characteristic equation of the edges with acoustic black hole power-law characteristics is: y=ax ε ,in a It is a constant. x Let be the base of the power function. ε The exponent of the power function; When the mesh size is greater than 100 mm, a small power law and a large constant are selected for the mesh. a The values, wherein the numerical range of the small power law is: 2 < ε < 2.5; the large constant... a The value range is: a > 1. When the mesh size is less than or equal to 100 mm, a power law mesh with a small constant is selected. a The value, wherein the numerical range of the power law is: 2.5 ≤ ε < 3; small constant. a The numerical range of the value is: a≤1.

2. The honeycomb-like vibration reduction structure with acoustic black hole characteristics according to claim 1, characterized in that: The grid is uniformly distributed in both length and width directions.

3. The honeycomb-like vibration reduction structure with acoustic black hole characteristics according to claim 1, characterized in that: The sandwich body (12) has multiple layers of grid in the width direction, with a gap of not less than 0.5 mm between adjacent grid layers.

4. The honeycomb-like vibration reduction structure with acoustic black hole characteristics according to claim 1, characterized in that: The material used for the inner viscoelastic material layer (14) is foam or rubber.

5. A honeycomb-like vibration reduction structure with acoustic black hole characteristics according to claim 1, characterized in that: The upper plate (11) and lower plate (13) are made of aluminum alloy or resin or the same material as the sandwich body (12).

6. A method for fabricating a honeycomb-like vibration damping structure with acoustic black hole characteristics, characterized by: The method for preparing the honeycomb-like vibration reduction structure with acoustic black hole characteristics as described in claim 1 is as follows: the lower plate (13) is fixed to the lower surface of the sandwich body (12), the inner filling viscoelastic material layer (14) is filled into the grid of the sandwich body (12), and the upper plate (11) is fixed to the upper surface of the sandwich body (12) to form a honeycomb-like vibration reduction structure with acoustic black hole characteristics.

7. The method for preparing a honeycomb-like vibration reduction structure with acoustic black hole characteristics according to claim 6, characterized in that: The upper plate (11) and the lower plate (13) are fixed to the upper and lower surfaces of the sandwich body (12) by adhesive or welding.

8. A method for using a honeycomb-like vibration damping structure with acoustic black hole characteristics, characterized by: When processing the workpiece (21), the honeycomb-like vibration damping structure with acoustic black hole characteristics as described in claim 1 is installed in the non-processing area of ​​the workpiece (21).

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