A lightweight vibration-damping milling cutter

Abstract

The present invention provides a lightweight vibration-damping milling cutter disc, which belongs to the field of mechanical processing. It includes a cutter disc housing, a tool holder housing, a lightweight vibration-damping unit, and a vibration-damping medium. The bottom of the cutter disc housing is provided with a flange, and the flange is provided with a concave blade mounting seat; the side wall of the cutter disc housing is provided with a filling port, and the interior of the cutter disc housing is a hollow cavity. The lightweight vibration-damping unit is provided in the hollow cavity inside the cutter disc housing and is connected to the cutter disc housing. The interior of the cutter disc housing is also filled with a vibration-damping medium. The lightweight vibration-damping milling tool design method provided by the present invention adopts lightweight vibration-damping units to be periodically and closely arranged inside the cutter disc and tool rod, which can greatly reduce the weight of the cutter disc and tool holder, and at the same time, each lightweight vibration-damping unit can maintain sufficient strength. The method of filling the lightweight vibration-damping unit with a vibration-damping medium can effectively solve the vibration problem caused by processing.

Description

Technical Field

[0001] The invention relates to a lightweight vibration-damping milling cutter disc, belonging to the technical field of mechanical processing. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the disclosure and should not be necessarily regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] Lightweighting technology has been widely applied in design, manufacturing, and production. In current production, milling tool holders and cutterheads are both solid metal structures. However, this presents numerous challenges: The heavy weight of the tool holder and cutterhead increases the torque required by the spindle to rotate them. This further increases the power consumption of the machine tool, resulting in energy waste.

[0004] Some research has explored lightweight tool design, but these efforts have limited the modification of the tool housing. This fails to achieve both lightweight design and vibration reduction, leading to increased vibration and even cutting chatter during machining. Existing tools are unable to simultaneously achieve lightweight design and reduce tool vibration.

[0005] With respect to the technical problems in the above background, no effective technical solutions have been proposed so far. Summary of the Invention

[0006] The purpose of the present invention is to provide a lightweight vibration-damping milling cutter head, which solves the shortcomings of the above-mentioned background technology in the control of flatness in the grinding of ultra-thin samples.

[0007] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:

[0008] It includes a cutter disc shell, a filling port, a lightweight vibration-damping unit and a vibration-damping medium. The bottom of the cutter disc shell is provided with a flange, and the flange is provided with a concave blade mounting seat; the side wall of the cutter disc shell is provided with a filling port, and the interior of the cutter disc shell is a hollow cavity. The lightweight vibration-damping unit is arranged in the hollow cavity inside the cutter disc shell and is connected to the cutter disc shell. The interior of the cutter disc shell is also filled with a vibration-damping medium.

[0009] Preferably, the lightweight vibration damping unit is formed by a periodically densely arranged single-cell structure, and the single-cell structure contains a non-solid hollow part and a solid supporting structure.

[0010] Preferably, the unit cell structure of the lightweight vibration damping unit is an n×n×n vibration damping cubic structure, and the vibration damping cubic structure includes rod OA, rod AB, rod BC, rod OD, rod DE, rod EF, rod OG, rod GH, rod HI, rod OJ, rod JK, rod KL, rod OM, rod MN, rod NP, rod OQ, rod QR, and rod RS; wherein A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, and S represent the endpoints of the rods, and the coordinates of the endpoints of the rods are as follows: O(0,0,0), A(0.25n,0.25n,0), B(0.5n,0,0), C (n,0,0), D(-0.25n,0.25n,0), E(0,0.5n,0), F(0,n,0), G(-0.25n,-0.25n,0), H(-0.5n,0,0), I(-n,0,0), J(0.25n,-0.25n,0 ), K(0,-0.5n,0), L(0,-n,0), M(0,0.25n,0.25n), N(0,0,0.5n), P(0,0,n), Q(0,-0.25n,-0.25n), R(0,0,-0.5n), S(0,0,-n).

[0011] Preferably, n is less than or equal to 50 mm, and the radius of the rod OA, rod AB, rod BC, rod OD, rod DE, rod EF, rod OG, rod GH, rod HI, rod OJ, rod JK, rod KL, rod OM, rod MN, rod NP, rod OQ, rod QR, and rod RS is less than 15 mm.

[0012] Preferably, the unit cell structure is designed based on a minimal surface filling, and the minimal surface expression is as follows:

[0013] cos(x)+cos(y)+cos(z)=0.2;

[0014] 0.5cos(y)sin(2x)sin(z)+0.5cos(z)sin(2y)sin(x)+0.5cos(x)sin(2z)sin(y)+0.

[0015] 5cos(2x)cos(2y)-0.5cos(2x)cos(2z)-0.5cos(2z)cos(2y)=0.1;

[0016] 2cos(x)cos(z)+2cos(x)cos(y)+2cos(y)cos(z)-cos(2x)-cos(2y)-cos(2z)=0.1;

[0017] Where: x represents the coordinate of the unit cell structure on the X axis in the Cartesian coordinate system, y represents the coordinate of the unit cell structure on the Y axis in the Cartesian coordinate system, and z represents the coordinate of the unit cell structure on the Z axis in the Cartesian coordinate system.

[0018] Preferably, the unit cell structure filled with the minimal curved surface has an external dimension not exceeding 50 mm×50 mm×50 mm, and a curved surface thickness not exceeding 15 mm.

[0019] Preferably, the vibration-damping medium is a high-damping liquid or solid, which is filled into the non-solid hollow portion of the lightweight vibration-damping unit inside the cutter head housing, and the high-damping liquid or solid is prepared by coupling nano-metal materials.

[0020] Preferably, the high-damping liquid is a polyol polyester material, and the high-damping solid is a rubber polydimethylsiloxane or a liquid crystal elastomer.

[0021] Preferably, the shell thickness of the cutter head housing is 3mm-10mm.

[0022] The advantages of the present invention are that the lightweight vibration damping units proposed by the present invention are densely arranged periodically inside the cutter disc and the cutter bar, which can greatly reduce the weight of the cutter disc and the cutter bar, while each lightweight vibration damping unit can maintain sufficient strength.

[0023] The lightweight tool provided by the present invention has a lightweight vibration-damping unit filled with a vibration-damping medium, which can effectively solve the problem of increased vibration caused by the decrease in stiffness due to the decrease in the weight of the cutter head.

[0024] The present invention adopts an integrated preparation method of metal additive manufacturing, which can efficiently prepare a cutter head with a lightweight vibration damping unit with a complex shape, while avoiding the waste of raw materials in traditional subtractive manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0026] Figure 1 This is a schematic diagram of the structure of a lightweight vibration-damping milling cutter head according to the present invention;

[0027] Figure 2 Schematic diagram of the unit cell structure of the lightweight vibration damping unit of the vibration damping cubic structure of the present invention;

[0028] Figure 3 Schematic diagram of the axis distribution of the unit cell structure of the lightweight vibration damping cubic structure of the present invention

[0029] Figure 4 Schematic diagram of the arrangement of lightweight vibration-damping units in a vibration-damping cubic structure;

[0030] Figure 5 Schematic diagram of the regular arrangement of body-centered cubic lightweight vibration damping units;

[0031] Figure 6 for Figure 5 Schematic diagram of the unit cell structure of the body-centered cubic lightweight vibration damping unit;

[0032] Figure 7 Schematic diagram of the regular arrangement of simple cubic structure lightweight vibration reduction units;

[0033] Figure 8 for Figure 7 Schematic diagram of the unit cell structure of a simple cubic lightweight vibration damping unit;

[0034] Figure 9 Schematic diagram of lightweight vibration damping unit with minimal curved surface shape of different parameters;

[0035] In the figure: 1. Cutter head housing; 2. Filling port; 3. Lightweight vibration damping unit; 4. Vibration damping medium. DETAILED DESCRIPTION

[0036] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figure 1 As shown, this embodiment describes a lightweight, vibration-damping milling cutterhead, comprising a cutterhead housing 1, a filling port 2, a lightweight vibration-damping unit 3, and a vibration-damping medium 4. The cutterhead housing 1 has a flange at its bottom, which is provided with a concave blade mounting seat. The filling port 2 is provided on the sidewall of the cutterhead housing. The interior of the cutterhead housing 1 is a hollow cavity. The lightweight vibration-damping unit 3 is disposed within the hollow cavity within the cutterhead housing 1 and connected to the cutterhead housing 1. The interior of the cutterhead housing 1 is also filled with a vibration-damping medium. The cutterhead housing 1, lightweight vibration-damping unit 3, and vibration-damping medium 4 complete the cutterhead's lightweight and vibration-damping functions.

[0039] It should be noted that the lightweight vibration damping unit 3 is arranged in an array along the three directions of the Cartesian coordinate system X / Y / X in the cutter head housing 1 by its unit cell structure, and the vibration damping medium 4 is filled in the lightweight vibration damping unit 3 to reduce the cutting vibration generated during the processing.

[0040] It should be noted that the unit cell structure of the lightweight vibration damping unit 3 in this embodiment is preferably a micro-truss structure such as a body-centered cubic structure, a simple cubic structure, or a face-centered cubic structure.

[0041] It should be noted that the thickness of the cutter head shell in this embodiment is preferably 5 mm, which reduces the weight while ensuring sufficient rigidity.

[0042] It should be noted that the lightweight vibration damping unit 3 in this embodiment is manufactured integrally with the cutter head housing 1, and the manufacturing process is preferably metal additive manufacturing.

[0043] It should be noted that the vibration-damping medium 4 is preferably a liquid damping material, preferably a polyol polyester in this embodiment. Polyol polyester polymers exhibit significant viscoelasticity. Under the influence of external forces, deformation does not occur immediately, but rather requires overcoming the attraction and friction between the intertwined polymer chains, which consumes energy. By utilizing this characteristic, polyol polyester absorbs energy from impact and vibration and releases it as heat, generating so-called mechanical losses, thereby reducing the amplitude and vibration.

[0044] The polyol polyester liquid damping material has the following characteristics: it is difficult to achieve high damping properties with straight-chain aliphatic binary polyesters; aromatic rings and side chains must be introduced into the polyester molecular chain; and a coupling agent must be used to couple nano-metal materials to increase thermal conductivity.

[0045] The damping medium 4 is filled into the lightweight damping unit 3 in the housing 1 through the filling port 2 on the housing. During the actual machining process, the tool cutting generates vibration, which is absorbed by the internal damping medium.

[0046] Example 2

[0047] like Figure 2-Figure 5 As shown, the single-cell structure is preferably a vibration-damping cubic structure, and the single-cell structure of the lightweight vibration-damping unit is an n×n×n vibration-damping cubic structure, and the vibration-damping cubic structure includes rod OA, rod AB, rod BC, rod OD, rod DE, rod EF, rod OG, rod GH, rod HI, rod OJ, rod JK, rod KL, rod OM, rod MN, rod NP, rod OQ, rod QR, and rod RS; wherein A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, and S represent the end points of the rods.

[0048] A three-dimensional Cartesian coordinate system is established with the endpoint O as the origin. The coordinates of the endpoints of the rods are as follows: O(0,0,0), A(0.25n,0.25n,0), B(0.5n,0,0), C(n,0,0), D(-0.25n,0.25n,0), E(0,0.5n,0), F(0,n,0), G(-0.25n,-0.25n,0), H(-0 .5n,0,0), I(-n,0,0), J(0.25n,-0.25n,0), K(0,-0.5n,0), L(0,-n,0), M(0,0.25n, 0.25n), N(0,0,0.5n), P(0,0,n), Q(0,-0.25n,-0.25n), R(0,0,-0.5n), S(0,0,-n).

[0049] Furthermore, the n is less than or equal to 50 mm, and the radii of the rod OA, rod AB, rod BC, rod OD, rod DE, rod EF, rod OG, rod GH, rod HI, rod OJ, rod JK, rod KL, rod OM, rod MN, rod NP, rod OQ, rod QR, and rod RS are less than 15 mm.

[0050] Example 3

[0051] Depend on Figure 6 As shown, this embodiment describes a preferred structure of a lightweight vibration-damping unit cell structure, which is based on a minimal surface filling design.

[0052] The minimal surface expression is preferably described by the following formula:

[0053] cos(x)+cos(y)+cos(z)=0.2;

[0054] 0.5cos(y)sin(2x)sin(z)+0.5cos(z)sin(2y)sin(x)+0.5cos(x)sin(2z)sin(y)+0.

[0055] 5cos(2x)cos(2y)-0.5cos(2x)cos(2z)-0.5cos(2z)cos(2y)=0.1;

[0056] 2cos(x)cos(z)+2cos(x)cos(y)+2cos(y)cos(z)-cos(2x)-cos(2y)-cos(2z)=0.1.

[0057] The minimal surface generated based on this implicit function relationship proposed in the present invention has a periodic law along the three directions of the X / Y / Z axes, and can replace the array structure formed by the micro-truss structure along the three directions of the X / Y / Z axes. The partial surface surrounded by a rectangular parallelepiped with a period length along the three directions of the X / Y / Z axes of the minimal surface structure is defined as a minimal surface unit cell structure. When this unit cell structure array is used to form a vibration reduction unit, the outer dimensions of the unit cell structure do not exceed 50mm×50mm×50mm, and the thickness of the surface does not exceed 15mm.

[0058] The minimal surface expression of the lightweight vibration damping unit cell structure proposed in the present invention also includes but is not limited to the following description:

[0059] sin(x)+sin(y)+sin(z)

[0060] sin(x)+sin(y)-z

[0061] cos(x)+cos(y)+cos(z)

[0062] sin(x)*cos(y)+sin(z)*cos(x)+sin(y)*cos(z)

[0063] cos(x)*cos(y)*cos(z)-sin(x)*sin(y)*sin(z)

[0064] 2*(cos(x)*cos(y)+cos(y)*cos(z)+cos(z)*cos(x))-(cos(2*x)+cos(2*y)+cos(2*

[0065] z))

[0066] 4*cos(x)*cos(y)*cos(z)-(cos(2*x)*cos(2*y)+cos(2*x)*cos(2*z)+cos(2*y)*co

[0067] s(2*z))

[0068] 0.5*(sin(2*x)*cos(y)*sin(z)+sin(2*y)*cos(z)*sin(x)+sin(2*z)*cos(x)*sin(

[0069] y))-0.5*(cos(2*x)*cos(2*y)+cos(2*x)*cos(2*z)+cos(2*y)*cos(2*z))

[0070] 10*(cos(x)+cos(y)+cos(z))-5.1*(cos(x)*cos(y)+cos(x)*cos(z)+cos(y)*cos(z) )

[0072] -2*(sin(2*x)*cos(y)*sin(z)+sin(2*y)*cos(z)*sin(x)+sin(2*z)*cos(x)*sin(y)

[0073] )+(cos(2*x)*cos(2*y)+cos(2*x)*cos(2*z)+cos(2*y)*cos(2*z))

[0074] sin(x)*sin(y)*sin(z)+sin(x)*cos(y)*cos(z)+cos(x)*sin(y)*cos(z)+cos(x)*c

[0075] os(y)*sin(z)

[0076] u*sin(x)*sin(2*y)*sin(3*z)+v*sin(2*x)*sin(y)*sin(3*z)+w*sin(2*x)*sin(3*

[0077] y)*sin(z)+a*sin(3*x)*sin(y)*sin(2*z)+b*sin(x)*sin(3*y)*sin(2*z)+c*sin(3*x)*

[0078] sin(2*y)*sin(z)

[0079] cos(2*x)*sin(y)*cos(z)+cos(2*y)*sin(z)*cos(x)+cos(2*z)*sin(x)*cos(y)-0.

[0080] sin(x)*sin(y)*sin(z)+sin(x)*cos(y)*cos(z)+cos(x)*sin(y)*cos(z)+cos(x)*c

[0081] os(y)*sin(z)

[0082] 3*(cos(x)+cos(y)+cos(z))+4*cos(x)*cos(y)*cos(z)

[0083] 10.0*(cos(x)*cos(y)+cos(y)*cos(z)+cos(z)*cos(x))-5.0*(cos(x*2)+cos(y*2)

[0084] +cos(2*2))-1.0

[0085] cos(x)*cos(y)+cos(y)*cos(z)+cos(x)*cos(z)-3*cos(x)*cos(y)*cos(z)

[0086] a*(cos(x)*cos(y)+b*cos(y)*cos(z)+cos(x)*cos(z))-c*cos(x)*cos(y)*cos(z)

[0087] 2.75*(sin(2*x)*sin(z)*cos(y)+sin(2*y)*sin(x)*cos(z)+sin(2*z)*sin(y)*cos

[0088] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A lightweight vibration-damping milling cutter head, characterized in that: The present invention comprises a cutter head housing (1), a filling port (2), a lightweight vibration damping unit (3) and a vibration damping medium (4); the bottom of the cutter head housing (1) is provided with a flange, and the flange is provided with a concave blade mounting seat; the side wall of the cutter head housing is provided with a filling port (2); the interior of the cutter head housing (1) is a hollow cavity; the lightweight vibration damping unit (3) is provided in the hollow cavity inside the cutter head housing (1) and is connected to the cutter head housing (1); the interior of the cutter head housing (1) is also filled with a vibration damping medium; The lightweight vibration damping unit (3) is formed by a unit cell structure that is densely arranged periodically, and the unit cell structure contains a non-solid hollow part and a solid supporting structure; The unit cell structure of the lightweight vibration damping unit is an n×n×n vibration damping cubic structure, which includes rod OA, rod AB, rod BC, rod OD, rod DE, rod EF, rod OG, rod GH, rod HI, rod OJ, rod JK, rod KL, rod OM, rod MN, rod NP, rod OQ, rod QR, and rod RS; wherein A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, and S represent the endpoints of the rods, and the coordinates of the endpoints of the rods are as follows: O(0,0,0), A(0.25n,0.25n,0), B(0.5n,0,0), C(n ,0,0), D(-0.25n,0.25n,0), E(0,0.5n,0), F(0,n,0), G(-0.25n,-0.25n,0), H(-0.5n,0,0), I(-n,0,0), J(0.25n,-0.25n,0) , K(0,-0.5n,0), L(0,-n,0), M(0,0.25n,0.25n), N(0,0,0.5n), P(0,0,n), Q(0,-0.25n,-0.25n), R(0,0,-0.5n), S(0,0,-n); The unit cell structure is filled based on a minimal surface, and the minimal surface expression is as follows: cos(x)+cos(y)+cos(z)=0.2; 0.5cos(y)sin(2x)sin(z)+0.5cos(z)sin(2y)sin(x)+0.5cos(x)sin(2z)sin(y)+0. 5cos(2x)cos(2y)-0.5cos(2x)cos(2z)-0.5cos(2z)cos(2y)=0.1; 2cos(x)cos(z)+2cos(x)cos(y)+2cos(y)cos(z)-cos(2x)-cos(2y)-cos(2z)=0.1; Where: x represents the coordinate of the unit cell structure on the X axis in the Cartesian coordinate system, y represents the coordinate of the unit cell structure on the Y axis in the Cartesian coordinate system, and z represents the coordinate of the unit cell structure on the Z axis in the Cartesian coordinate system.

2. The lightweight vibration-damping milling cutter disc according to claim 1, characterized in that: The n is less than or equal to 50 mm, and the radii of the rod OA, rod AB, rod BC, rod OD, rod DE, rod EF, rod OG, rod GH, rod HI, rod OJ, rod JK, rod KL, rod OM, rod MN, rod NP, rod OQ, rod QR, and rod RS are less than 15 mm.

3. The lightweight vibration-damping milling cutter disc according to claim 1, characterized in that: The unit cell structure filled with the minimal curved surface has an external dimension of no more than 50 mm × 50 mm × 50 mm, and a curved surface thickness of no more than 15 mm.

4. The lightweight vibration-damping milling cutter disc according to claim 1, characterized in that: The vibration-damping medium (4) is a high-damping liquid or solid, which is filled into the non-solid hollow portion of the lightweight vibration-damping unit (3) inside the cutter head housing (1), and the high-damping liquid or solid is prepared by coupling nano-metal materials.

5. The lightweight vibration-damping milling cutter disc according to claim 4, characterized in that: The high-damping liquid is a polyol polyester material, and the high-damping solid is a rubber polydimethylsiloxane or a liquid crystal elastomer.

6. The lightweight vibration-damping milling cutter head according to claim 1, characterized in that: The shell thickness of the cutter head housing (1) is 3 mm to 10 mm.

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