Vibration reduction bionic boring bar based on hedgehog thorns and biological eggshells

Abstract

The invention discloses a vibration reduction bionic boring bar based on hedgehog thorns and biological eggshells, and relates to the technical field of boring bars, the vibration reduction bionic boring bar comprises a boring bar body, a cavity is formed in the boring bar body, the bionic eggshells which are transversely distributed at equal intervals are fixed in the cavity, and longitudinal reinforcing ribs are fixed in the bionic eggshells; the first transverse reinforcing rib, the second transverse reinforcing rib, the third transverse reinforcing rib and the longitudinal reinforcing rib which are designed based on hedgehog thorn bionics are fixed in the boring bar body, so that buckling and damage of the boring bar body are delayed, and the boring bar has an excellent external force resisting effect; the bionic eggshell which is designed in a bionic mode based on the thin shell structure of the biological eggshell is fixed in the boring rod body, so that stress distribution in the boring rod body is more uniform, the stress concentration effect is smaller, the mechanical efficiency is improved, and compared with an existing common solid boring rod, the effects of improving rigidity and reducing vibration are achieved; the vibration problem of the boring rod can be effectively solved, and the boring machining precision and machining efficiency are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of boring bars, and in particular to a vibration-damping bionic boring bar based on hedgehog spines and biological eggshells. Background Art

[0002] The machinery manufacturing industry occupies a very important position in the entire national economy, and metal boring processing is a fundamental and reliable means of fine processing. During the boring process, the boring bar is in an overhanging state, which is often accompanied by vibration. Especially in the boring process of slender holes, vibration is more likely to occur. When the boring bar vibrates, the surface roughness of the workpiece increases, and the bored hole is easily damaged.

[0003] At present, most of the existing conventional boring bars are solid designs. Although they have a simple structure, they do not have a corresponding vibration damping structure. The stiffness and vibration damping performance are relatively low, and the processing accuracy and efficiency of the workpiece cannot be guaranteed. Therefore, the present invention proposes a vibration-damping bionic boring bar based on hedgehog spines and biological eggshells to solve the problems existing in the existing technology. Summary of the Invention

[0004] In response to the above problems, the purpose of the present invention is to propose a vibration-damping bionic boring bar based on hedgehog spines and biological eggshells, which solves the problem that existing boring bar products, although simple in structure, do not have corresponding vibration-damping structures and have low stiffness and vibration-damping performance.

[0005] In order to achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a vibration-damping bionic boring bar based on hedgehog spines and biological eggshells, comprising a boring bar body, a cavity is provided inside the boring bar body, bionic eggshells are fixed inside the cavity and are evenly distributed laterally, longitudinal reinforcement ribs are fixed inside the bionic eggshells, a first transverse reinforcement rib is fixed between the inner walls on both sides of the cavity, a second transverse reinforcement rib is fixed between the inner walls on both sides of the cavity around the first transverse reinforcement rib, a third transverse reinforcement rib is fixed between the inner walls on both sides of the cavity around the second transverse reinforcement rib, and the first transverse reinforcement rib, the second transverse reinforcement rib and the third transverse reinforcement rib are all separated by the bionic eggshell and the longitudinal reinforcement rib.

[0006] A further improvement is that the bionic eggshell includes two groups of arched covers that are symmetrically distributed and fixed to the inner wall of the cavity, and the longitudinal reinforcing ribs are fixed between the two groups of symmetrically distributed arched covers.

[0007] Further improvements are as follows: the first transverse reinforcement ribs are provided in several groups and are cylindrical in design, one group of the first transverse reinforcement ribs among the several groups of the first transverse reinforcement ribs is located at the center position, and the remaining first transverse reinforcement ribs are distributed in a circular and equidistant manner around the first transverse reinforcement ribs at the center position.

[0008] A further improvement is that: the second transverse reinforcing ribs are provided in a plurality of groups and are designed in a strip shape, and the plurality of groups of the second transverse reinforcing ribs are distributed in a circular shape and at equal intervals around the periphery of the first transverse reinforcing ribs.

[0009] A further improvement is that the third transverse reinforcing ribs are designed to be cylindrical, and the third transverse reinforcing ribs surround the periphery of several groups of the second transverse reinforcing ribs.

[0010] A further improvement is that: the outer walls on both sides of the longitudinal reinforcing rib are provided with truncated cone-shaped grooves, and the first transverse reinforcing rib is fixed to the position of the truncated cone-shaped groove of the longitudinal reinforcing rib.

[0011] A further improvement is that an annular groove is symmetrically provided on the side wall where the longitudinal reinforcing rib contacts the inner wall of the bionic eggshell, and the third transverse reinforcing rib is fixed to the annular groove position of the longitudinal reinforcing rib.

[0012] A further improvement is that the vibration-damping bionic boring bar is produced by 3D printing.

[0013] The beneficial effects of the present invention are as follows: the present invention delays the occurrence of buckling and damage of the boring bar body by fixing the first transverse reinforcing rib, the second transverse reinforcing rib, the third transverse reinforcing rib and the longitudinal reinforcing rib based on the bionic design of hedgehog spines inside the boring bar body, and has excellent resistance to external forces; and by fixing the bionic eggshell with a thin shell structure bionic design based on the biological eggshell inside the boring bar body, the stress distribution inside the boring bar body is made more uniform, the stress concentration effect is smaller, and the mechanical efficiency is improved. Compared with the existing ordinary solid boring bar, the present invention achieves the effects of improving stiffness and reducing vibration, can effectively solve the problem of boring bar vibration, and ensure boring processing accuracy and processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front cross-sectional view of the present invention;

[0015] Figure 2 The present invention Figure 1 A magnified view of point A in the figure;

[0016] Figure 3 is a side sectional view of the present invention;

[0017] Figure 4 is a schematic diagram of the second transverse reinforcing rib structure of the present invention;

[0018] Figure 5 is a cross-sectional view of a bionic eggshell of the present invention;

[0019] Figure 6 This is a schematic diagram of the decomposition of the bionic eggshell of the present invention;

[0020] Figure 72 is a schematic diagram of the analysis of the stiffness simulation results in an embodiment of the present invention.

[0021] Among them: 1. boring bar body; 2. cavity; 3. bionic eggshell; 4. longitudinal reinforcement rib; 5. first transverse reinforcement rib; 6. second transverse reinforcement rib; 7. third transverse reinforcement rib; 301. arched cover; 401. truncated cone groove; 402. annular groove. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] The machinery manufacturing industry occupies a very important position in the entire national economy, and metal boring processing is a fundamental and reliable means of fine processing. A boring machine is a machine tool used to bore workpieces. It is mainly used to process cylindrical holes or other shaped through holes and blind holes on the workpiece. Boring machines can perform high-precision and high-efficiency hole processing and are widely used in machinery manufacturing, automobiles, aerospace, mold manufacturing and other industries. A boring bar is a long rod-shaped connecting rod used to connect the spindle of a machine tool (such as a boring machine or a deep hole drilling and boring machine) with a boring tool. It is one of the indispensable tools in boring machine processing. It plays the role of transmitting torque and supporting the boring tool, ensuring the stability and accuracy of the boring tool during the processing;

[0024] Based on the findings in the prior art, during the boring process, the boring bar is in an overhanging state, which is often accompanied by vibration. Especially during the boring process of slender holes, vibration is more likely to occur. When the boring bar vibrates, the surface roughness of the workpiece increases, the bored hole is easily damaged, and the vibration of the boring bar can also cause the vibration of the machine tool, causing damage to the machine tool. In summary, if the vibration of the boring bar cannot be suppressed, it will not only have a negative impact on the boring process accuracy and processing efficiency, but also increase the equipment use cost to a certain extent.

[0025] At present, there are many methods to suppress vibration, such as reducing the overhang length of the boring bar, increasing the diameter of the boring bar, and reducing the cutting amount. However, these methods cannot fundamentally solve the vibration problem and have greatly restricted the boring process. Most existing conventional boring bars are solid designs. Although they have a simple structure, they do not have the corresponding vibration reduction structure. The stiffness and vibration reduction performance are both low, and the processing accuracy and efficiency of the workpiece cannot be guaranteed.

[0026] Regarding the problems existing in the above-mentioned prior art, see Figure 1 、 Figure 2、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 The present embodiment provides a vibration-damping bionic boring bar based on hedgehog spines and biological eggshells, comprising a boring bar body 1 with a cylindrical design and a cavity 2 with a cylindrical design opened inside the boring bar body 1, a bionic eggshell 3 designed based on the thin shell structure of a biological eggshell fixed inside the cavity 2, and the bionic eggshell 3 is distributed in the cavity 2 at equal intervals in the horizontal direction, wherein the four groups of bionic eggshells 3 on the left are all complete eggshell structures and have longitudinal reinforcing ribs 4 fixed inside, while the bionic eggshell 3 on the far right is a half eggshell structure and is in contact with and fixed to the right inner wall of the cavity 2, without longitudinal reinforcing ribs 4 inside, a first transverse reinforcing rib 5 is fixed between the left and right inner walls of the cavity 2, a second transverse reinforcing rib 6 is provided around the first transverse reinforcing rib 5, and the second transverse reinforcing rib 6 is fixed between the left and right inner walls of the cavity 2, a third transverse reinforcing rib 7 is provided around the second transverse reinforcing rib 6, and the third transverse reinforcing rib 6 is fixed inside the left and right inner walls of the cavity 2 Between the walls, the first transverse reinforcement rib 5, the second transverse reinforcement rib 6 and the third transverse reinforcement rib 7 are all distributed transversely in the cavity 2, and are all separated by the bionic eggshell 3 and the longitudinal reinforcement rib 4. In this embodiment, the first transverse reinforcement rib 5, the second transverse reinforcement rib 6, the third transverse reinforcement rib 7 and the longitudinal reinforcement rib 4 are based on the bionic design of hedgehog spines, which delays the buckling and damage of the boring bar body 1 and has excellent resistance to external forces. The bionic eggshell 3 is based on the bionic design of the thin shell structure of the biological eggshell, which makes the internal stress distribution of the boring bar body 1 more uniform, the stress concentration effect is smaller, and the mechanical efficiency is improved. Compared with the existing ordinary solid boring bar, this embodiment combines the hedgehog spine structure with the biological eggshell structure to achieve increased stiffness and reduced stress amplitude, which helps to reduce fatigue damage and possible failure risks of the structure under the same external force, and the interior is a porous structure, which reduces material costs to a certain extent.

[0027] The bionic eggshell 3 includes two groups of arched cover shells 301 with arc-shaped protrusions and fixed to the inner wall of the cavity 2. It has the function of evenly distributing the pressure to various parts of the object and reducing the pressure. There are nine groups of arched cover shells 301 in this embodiment, of which eight groups of arched cover shells 301 constitute four complete arched cover shells 301, and the remaining group of arched cover shells 301 is fixedly connected to the right inner wall of the cavity 2, and the longitudinal reinforcement ribs 4 are fixed between the two symmetrically distributed groups of arched cover shells 301.

[0028] The first transverse reinforcing ribs 5 are cylindrical in design and are provided in thirteen groups, one of which is located at the center of the remaining twelve groups of first transverse reinforcing ribs 5, and the remaining twelve groups are distributed in a circular manner with equal intervals. The second transverse reinforcing ribs 6 are strip-shaped in design and are provided in twelve groups, and the twelve groups of second transverse reinforcing ribs 6 are distributed in a circular manner with equal intervals around the periphery of the first transverse reinforcing ribs 5. The third transverse reinforcing ribs 7 are cylindrical in design and surround the periphery of the twelve groups of second transverse reinforcing ribs 6.

[0029] A truncated cone-shaped groove 401 is provided at the center position of the outer walls on both sides of the longitudinal reinforcement rib 4. The first transverse reinforcement rib 5 is fixed to the truncated cone-shaped groove 401 of the longitudinal reinforcement rib 4. Two groups of annular grooves 402 are provided on the side wall where the longitudinal reinforcement rib 4 contacts the inner wall of the bionic eggshell 3. The third transverse reinforcement rib 7 is fixed to the annular groove 402 of the longitudinal reinforcement rib 4. Through the combined structural design of the first transverse reinforcement rib 5, the second transverse reinforcement rib 6, the third transverse reinforcement rib 7 and the longitudinal reinforcement rib 4, the occurrence of buckling and damage is delayed, and the device has excellent resistance to external forces.

[0030] The vibration-damping bionic boring bar in this embodiment is produced by 3D printing, and the components that contact each other are an integrated molding structure.

[0031] The vibration-damping bionic boring bar based on hedgehog spines and biological eggshells of the present invention is compared with an ordinary boring bar. Figure 7 This is a diagram of the stiffness simulation results of the vibration-damping bionic boring bar and the ordinary boring bar under different forces. The simulation was performed using ansys simulation software, and the given forces were 400N, 200N, and 100N. The stiffness of the ordinary boring bar before improvement was 12037N / mm, 11328N / mm, and 10134N / mm, respectively. The stiffness of the improved bionic boring bar was 13848N / mm, 13101N / mm, and 11824N / mm, and the stiffness was increased by approximately 15.04%, 15.65%, and 16.68%, respectively.

[0032] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration-damping bionic boring bar based on hedgehog spines and biological eggshells, comprising a boring bar body (1), characterized in that: The boring bar body (1) is provided with a cavity (2) inside, a bionic eggshell (3) distributed in a transverse equidistant manner is fixed inside the cavity (2), a longitudinal reinforcing rib (4) is fixed inside the bionic eggshell (3), a first transverse reinforcing rib (5) is fixed between the inner walls on both sides of the cavity (2), a second transverse reinforcing rib (6) fixed between the inner walls on both sides of the cavity (2) is provided around the first transverse reinforcing rib (5), a third transverse reinforcing rib (7) fixed between the inner walls on both sides of the cavity (2) is provided around the second transverse reinforcing rib (6), and the first transverse reinforcing rib (5), the second transverse reinforcing rib (6) and the third transverse reinforcing rib (7) are all separated by the bionic eggshell (3) and the longitudinal reinforcing rib (4).

2. The vibration-damping bionic boring bar based on hedgehog spines and biological eggshells according to claim 1, characterized in that: The bionic eggshell (3) comprises two groups of symmetrically distributed arched cover shells (301) fixed to the inner wall of the cavity (2), and the longitudinal reinforcing ribs (4) are fixed between the two symmetrically distributed groups of arched cover shells (301).

3. The vibration-damping bionic boring bar based on hedgehog spines and biological eggshells according to claim 1, characterized in that: The first transverse reinforcing ribs (5) are provided in a plurality of groups and are cylindrical in design, wherein one group of the first transverse reinforcing ribs (5) is located at a central position, and the remaining first transverse reinforcing ribs (5) are distributed in a circular and equidistant manner around the first transverse reinforcing ribs (5) at the central position.

4. The vibration-damping bionic boring bar based on hedgehog spines and biological eggshells according to claim 1, characterized in that: The second transverse reinforcing ribs (6) are provided in a plurality of groups and are designed in a strip shape, and the plurality of groups of the second transverse reinforcing ribs (6) are distributed in an annular manner and at equal intervals around the periphery of the first transverse reinforcing ribs (5).

5. The vibration-damping bionic boring bar based on hedgehog spines and biological eggshells according to claim 1, characterized in that: The third transverse reinforcing rib (7) is designed to be cylindrical, and the third transverse reinforcing rib (7) surrounds the periphery of several groups of the second transverse reinforcing ribs (6).

6. The vibration-damping bionic boring bar based on hedgehog spines and biological eggshells according to claim 1, characterized in that: The outer walls on both sides of the longitudinal reinforcing rib (4) are provided with truncated cone-shaped grooves (401), and the first transverse reinforcing rib (5) is fixed to the truncated cone-shaped grooves (401) of the longitudinal reinforcing rib (4).

7. The vibration-damping bionic boring bar based on hedgehog spines and biological eggshells according to claim 1, characterized in that: An annular groove (402) is symmetrically provided on the side wall of the longitudinal reinforcing rib (4) in contact with the inner wall of the bionic eggshell (3), and the third transverse reinforcing rib (7) is fixed to the position of the annular groove (402) of the longitudinal reinforcing rib (4).

8. The vibration-damping bionic boring bar based on hedgehog spines and biological eggshells according to claim 1, characterized in that: The vibration-damping bionic boring bar is produced by 3D printing.

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