A longitudinal bending composite rotating ultrasonic vibration special-shaped horn

Abstract

The invention relates to the field of rotary ultrasonic machining, and specifically discloses a longitudinal-bending composite rotary ultrasonic vibration special-shaped amplitude transformer, wherein the amplitude transformer comprises a single-excitation longitudinal vibration input portion, an amplitude transformer transmission portion, a vibration node portion, a dynamic balance vibration separation portion, and a longitudinal-bending composite output portion in order from an input portion to an output portion; wherein the single-excitation longitudinal vibration input portion, the amplitude transformer transmission portion, the vibration node portion, and the longitudinal-bending composite output portion are coaxially arranged, and the single-excitation longitudinal vibration input portion, the amplitude transformer transmission portion, the vibration node portion, and the longitudinal-bending composite output portion are all centrally symmetrical structures, and the dynamic balance vibration separation portion comprises a bending vibrator structure and a longitudinal vibrator structure with different cross-sectional areas, the masses of the bending vibrator structure and the longitudinal vibrator structure are equal, and the centers of mass of the bending vibrator structure and the longitudinal vibrator structure are symmetrically arranged about the axis of the amplitude transformer rotation axis; the invention can change the vibration mode, convert the single-excitation longitudinal vibration into a longitudinal-bending composite vibration, and avoid the problem of dynamic imbalance in the rotation process.

Description

Technical Field

[0001] The invention relates to the field of rotary ultrasonic machining, in particular to a longitudinal-bending composite rotary ultrasonic vibration special-shaped horn. Background Art

[0002] At present, two-dimensional ultrasonic vibration-assisted processing devices generally have two categories: tool vibration and workpiece vibration. In rotary ultrasonic vibration-assisted processing, the two-dimensional ultrasonic vibration-assisted processing device generally adopts two-dimensional workpiece vibration or a composite vibration mode of one-dimensional workpiece vibration and one-dimensional tool vibration; and the workpiece vibration is limited by the workpiece, and the use of tool vibration can overcome this shortcoming; for two-dimensional ultrasonic tool vibration-assisted processing devices, there are generally two types, single-excitation two-dimensional ultrasonic tool vibration and multi-excitation two-dimensional ultrasonic tool vibration, and multi-excitation two-dimensional ultrasonic tool vibration is not suitable for rotary ultrasonic vibration-assisted processing due to its complex structure; there are two ways for a single-excitation ultrasonic tool vibration device to realize two-dimensional ultrasonic vibration: one is by changing the vibration form of piezoelectric ceramics, and the other is by changing the shape of the amplitude transformer. Since the shape of this type of amplitude transformer is asymmetric and the mass eccentricity is serious, this type of amplitude transformer is difficult to apply to the scenario of two-dimensional rotary ultrasonic tool vibration-assisted processing.

[0003] The Chinese utility model patent with publication number CN211940132U discloses a longitudinal vibration bending ultrasonic vibration horn, which includes an input part, a bending vibration output part, a vibration node part, a vibration separation hole and an asymmetric groove. The device can convert the single longitudinal vibration of the input part into bending vibration; the Chinese invention patent with publication number CN117086648A discloses a horn for controlling the elliptical vibration shape, which includes an input part, an output part and a circular arc transition section. The device can obtain elliptical vibration trajectories of different shapes and sizes according to the different eccentric distances of the circular arc transition section; the Chinese utility model patent with publication number CN211940132U discloses a longitudinal vibration bending ultrasonic vibration horn, which includes an input part, an output part and a circular arc transition section. The device can obtain elliptical vibration trajectories of different shapes and sizes according to the different eccentric distances of the circular arc transition section; the Chinese invention patent with publication number CN1150560 The Chinese invention patent No. 46A discloses a two-dimensional piezoelectric special-shaped amplitude transformer ultrasonic polishing device, which includes a transducer, a pre-tightening bolt, a connecting rod, a flexible rod, and a special-shaped amplitude transformer. The device can realize longitudinal and bending vibrations while providing compensation for the resonant frequency drift and displacement in the longitudinal and bending vibration directions caused by gravity changes; the Chinese invention patent with publication number CN110212425A discloses an ultrasonic single-excitation elliptical vibration grinding design method and device, which includes a transducer, an amplitude transformer, a prestressed bolt, a nut, and a cup-shaped grinding wheel. The device can realize the combination of longitudinal-bending-longitudinal vibration modes to form an elliptical vibration trajectory.

[0004] The above patents can realize longitudinal and bending two-dimensional vibration of the front end of the amplitude transformer, but due to the asymmetry of the structure, it is difficult to use it together with the rotary tool in the rotary processing system. Because the rotary processing system outputs rotational motion, the existing amplitude transformer has an eccentric center of mass due to the asymmetric structure, so it will cause serious dynamic imbalance problems during the rotation process. Or the structure is too complicated and is not suitable for use with rotary processing tools, or the realization of longitudinal and bending vibration depends on the shape of the tool connected to the amplitude transformer, which greatly limits the scope of application. Summary of the invention

[0005] In order to solve the problems of complex structure, dynamic imbalance, and dependence on tool shape of existing ultrasonic vibration longitudinal bending amplitude transformers in the field of rotary ultrasound, the present invention provides a amplitude transformer with a simple structure, rotational dynamic balance, and controllable two-dimensional longitudinal bending vibration trajectory. The amplitude transformers with different asymmetric cross-sectional area ratios adjust the longitudinal bending vibration trajectory for rotary ultrasonic assisted processing.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] In the first aspect, the present invention provides a longitudinal-bending composite rotating ultrasonic vibration special-shaped amplitude transformer, wherein the amplitude transformer comprises, from the input part to the output part, a single-excitation longitudinal vibration input part, an amplitude transformer transmission part, a vibration node part, a dynamic balance vibration separation part, and a longitudinal-bending composite output part; wherein the single-excitation longitudinal vibration input part, the amplitude transformer transmission part, the vibration node part, and the longitudinal-bending composite output part are coaxially arranged, and the single-excitation longitudinal vibration input part, the amplitude transformer transmission part, the vibration node part, and the longitudinal-bending composite output part are all centrally symmetrical structures, and the dynamic balance vibration separation part comprises a bending vibrator structure and a longitudinal vibrator structure with different cross-sectional areas, the masses of the bending vibrator structure and the longitudinal vibrator structure are equal, and the center of mass of the bending vibrator structure and the longitudinal vibrator structure are symmetrically arranged about the axis of the amplitude transformer rotation axis; the longitudinal vibrator structure consists of a first longitudinal vibrator and a second longitudinal vibrator with different cross-sections. The bending vibrator structure and the longitudinal vibrator structure of the present invention require that the mass center of the dynamic balance vibration separation part is on the rotation axis of the horn. The bending vibrator structure is used to make the vibration distribution of the horn uneven, generating a bending vibration component. The bending vibrator structure converts the longitudinal vibration into bending vibration, and the longitudinal vibrator structure transmits the longitudinal vibration to the front end. The bending vibrator structure of the dynamic balance vibration separation part and the longitudinal vibrator structure of the vibration separation structure cooperate with each other to convert the single excitation longitudinal vibration of the input part into a longitudinal-bending composite vibration.

[0008] As a further technical solution, the longitudinal section of the bending vibrator structure is a trapezoidal or quasi-trapezoidal structure; the first longitudinal vibrator and the second longitudinal vibrator are square structures with unchanged cross sections. The ratio of the cross-sectional areas at both ends of the bending vibrator structure is used to affect the magnitude of the bending vibration of the amplitude transformer; when the ratio of the cross-sectional area of ​​the bending vibrator structure near the front end to the cross-sectional area of ​​the bending vibrator structure near the rear end becomes larger, the amplitude of the bending vibration of the amplitude transformer becomes larger.

[0009] As a further technical solution, the center of mass of the dynamic balancing vibration-dividing part is on the axis of the horn rotating shaft.

[0010] As a further technical solution, the radial dimension of the end surface of the dynamic balancing vibration dividing part close to the vibration node part is less than or equal to the radial dimension of the clamping mechanism of the vibration node part.

[0011] As a further technical solution, the longitudinal-bending composite output part is connected to the tool through a clamping connection mechanism, and the radial dimension of the tool is less than or equal to two-thirds of the radial dimension of the output part; because the radial dimension is too large, it will affect the overall resonant frequency of the rod, and the axial dimension of the grinding wheel should not be too long. If it is to be long, it is necessary to ensure that the radial dimension of the grinding wheel is much smaller than the axial dimension of the output end so as to form local resonance.

[0012] As a further technical solution, the amplitude transformer transmission part includes three parts, which are a first cylinder, a cone and a second cylinder in sequence along the direction from the input part to the output part; the diameter of the first cylinder is equal to the minimum diameter of the cone, and the diameter of the second cylinder is equal to the maximum diameter of the cone; through this design, the continuity of the amplitude transformer is ensured as much as possible, stress concentration and vibration loss are reduced, and the number of amplitude transformer transmission parts can be increased or decreased according to actual application requirements.

[0013] As a further technical solution, the vibration node portion includes a clamping mechanism, which is a connecting plate or a connecting flange.

[0014] As a further technical solution, the longitudinal-bending compound output part is connected to a tool for rotary processing, and the longitudinal-bending compound output part is a connecting shaft, and a connecting hole is arranged along the axial direction of the connecting shaft.

[0015] As a further technical solution, the radial dimension of the end face of the connecting shaft close to the vibration node portion is less than twice the radial dimension of the end face of the bending vibrator structure close to the longitudinal-bending composite output portion.

[0016] In the second aspect, the present invention also provides a longitudinal-bending composite rotating ultrasonic vibration special-shaped amplitude transformer, wherein the amplitude transformer is composed of a single excitation longitudinal vibration input part, an amplitude transformer transmission part, a vibration node part, a dynamic balance vibration separation part, and a longitudinal-bending composite output part from the input part to the output part; wherein the single excitation longitudinal vibration input part, the amplitude transformer transmission part, the vibration node part and the longitudinal-bending composite output part are coaxially arranged, and the single excitation longitudinal vibration input part, the amplitude transformer transmission part, the vibration node part and the longitudinal-bending composite output part are all centrally symmetrical structures; the dynamic balance vibration separation part includes a longitudinal vibrator structure and a bending vibrator structure, and the bending vibrator structure includes a first bending vibrator, a second bending vibrator and a third bending vibrator, and the longitudinal vibrator structure is a cylinder, and the first bending vibrator and the second bending vibrator are symmetrically arranged at positions close to the end face of the cylinder; the third bending vibrator is located at the center of the side of the cylinder, and the sum of the masses of the first bending vibrator and the second bending vibrator is equal to the mass of the third bending vibrator, and the combined center of mass of the first bending vibrator and the second bending vibrator is symmetrical with the center of mass of the third bending vibrator about the rotation axis.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a longitudinal-bending composite rotating ultrasonic vibration special-shaped horn, which can not only transmit ultrasonic vibration and change the amplitude of ultrasonic vibration, but also change the vibration mode, converting single-excitation longitudinal vibration into longitudinal-bending composite vibration, thereby avoiding the problem of dynamic imbalance in the rotation process.

[0019] The invention provides a longitudinal bending composite rotating ultrasonic vibration shaped horn, whose longitudinal bending composite output part can be directly connected to any tool head that needs to rotate and longitudinal bending vibration, realizing longitudinal bending vibration while avoiding the dynamic imbalance problem caused by the rotation of the traditional longitudinal bending horn; the single excitation longitudinal vibration transducer can indirectly drive the tool head that needs to rotate to perform longitudinal bending vibration through a rotating ultrasonic vibration longitudinal bending composite horn based on dynamic balance provided by the patent of the invention. The longitudinal bending composite rotating ultrasonic vibration shaped horn provided by the patent of the invention has a simple structure and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the horn structure disclosed in Example 1 of the present invention;

[0021] Figure 2 This is an exploded view of the overall structure of the horn disclosed in Example 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the horn structure disclosed in Example 2 of the present invention;

[0023] Figure 4 This is an exploded view of the overall structure of the horn disclosed in Example 2 of the present invention;

[0024] Figure 5 This is a schematic diagram of the horn structure disclosed in Example 3 of the present invention;

[0025] Figure 6 This is an exploded view of the overall structure of the horn disclosed in Example 3 of the present invention;

[0026] Figure 7 This is a schematic diagram of the horn structure disclosed in Example 4 of the present invention;

[0027] Figure 8 This is an exploded view of the overall structure of the horn disclosed in Example 4 of the present invention;

[0028] Fig. 9 This is an exploded view of the overall structure of the horn disclosed in Example 5 of the present invention;

[0029] Fig.10 This is a schematic diagram of the horn structure disclosed in Example 6 of the present invention;

[0030] Fig.11 This is an exploded view of the overall structure of the horn disclosed in Example 6 of the present invention;

[0031] Fig.12 It is a schematic diagram of the two-dimensional structure of the horn disclosed in Example 7 of the present invention;

[0032] Fig.13 It is a schematic diagram of the three-dimensional structure of the horn disclosed in Example 7 of the present invention;

[0033] Fig.14 It is a side view of the horn disclosed in Example 7 of the present invention;

[0034] Numbers in the figure: 1. Single excitation longitudinal vibration input part, 2. First amplitude transformer transmission part, 3. Second amplitude transformer transmission part, 4. Third amplitude transformer transmission part, 5. Vibration node part, 6. Dynamic balance sub-vibration part, 6.1. Bending vibrator structure, 6.1.1. First bending vibrator, 6.1.2. Second bending vibrator, 6.1.3 Third bending vibrator, 6.2. Longitudinal vibrator structure, 6.2.1. First longitudinal vibrator, 6.2.2. Second longitudinal vibrator, 7. Longitudinal-bending composite output part, 8. Rotating processing tool, 9. Single excitation longitudinal vibration transducer. DETAILED DESCRIPTION

[0035] Hereinafter, the present invention will be further described based on preferred embodiments with reference to the accompanying drawings.

[0036] In addition, various structures in the drawings are enlarged (thickened) or reduced (thinned) to facilitate understanding, but this practice is not intended to limit the protection scope of the present invention.

[0037] Words importing the singular also include the plural and vice versa.

[0038] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "left", "right", "inside", "outside", etc. appear to indicate directions or positional relationships, they are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0039] The words in this specification are used to illustrate the embodiments of the present invention, but are not intended to limit the present invention. It should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" 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, a direct connection, or a connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the above specific meanings in the present invention can be specifically understood.

[0040] Example 1

[0041] like Figure 1 As shown, the present embodiment discloses a special-shaped amplitude transformer suitable for rotary ultrasonic vibration and longitudinal bending compound, wherein the amplitude transformer comprises, from the input part to the output part, a single excitation longitudinal vibration input part 1, a first amplitude transformer transmission part 2, a second amplitude transformer transmission part 3, a third amplitude transformer transmission part 4, a vibration node part 5, a dynamic balance vibration separation part 6, and a longitudinal bending compound output part 7; it should be noted that the excitation longitudinal vibration input part 1, the first amplitude transformer transmission part 2, the second amplitude transformer transmission part 3, the third amplitude transformer transmission part 4, the vibration node part 5, the dynamic balance vibration separation part 6, and the longitudinal bending compound output part 7 are a whole, and are formed as a whole during molding.

[0042] Among them, the single excitation longitudinal vibration input part 1, the first transformer transmission part 2, the second transformer transmission part 3, the third transformer transmission part 4, the vibration node part 5 and the longitudinal-bending composite output part 7 are coaxially arranged, and the single excitation longitudinal vibration input part 1, the first transformer transmission part 2, the second transformer transmission part 3, the third transformer transmission part 4, the vibration node part 5 and the longitudinal-bending composite output part 7 are all centrally symmetrical structures, the dynamic balance vibration separation part 6 includes a bending vibrator structure 6.1 and a longitudinal vibrator structure 6.2 with different cross-sectional areas, and the longitudinal vibrator structure 6.2 includes a first longitudinal vibrator 6.2.1 and a longitudinal vibrator 6.2 with different cross-sectional areas. The second longitudinal vibrator 6.2.2, the masses of the bending vibrator structure 6.1 and the longitudinal vibrator structure 6.2 are equal, and the centers of mass of the bending vibrator structure 6.1 and the longitudinal vibrator structure 6.2 are symmetrically arranged about the axis of rotation of the amplitude transformer; the bending vibrator structure 6.1 and the longitudinal vibrator structure 6.2 make the center of mass of the dynamic balancing vibration separation part need to be on the rotation axis of the amplitude transformer, and the bending vibrator structure 6.1 is used to make the vibration distribution of the amplitude transformer uneven, generating a bending vibration component; the bending vibrator structure 6.1 converts the longitudinal vibration into bending vibration, and the longitudinal vibrator structure 6.2 transmits the longitudinal vibration to the front end. The bending vibrator structure 6.1 of the dynamic balancing vibration separation part 6 and the longitudinal vibrator structure 6.2 of the vibration separation structure cooperate with each other to convert the single excitation longitudinal vibration of the input part into a longitudinal-bending composite vibration; wherein the cross-sectional area of ​​the bending vibrator structure 6.1 changes according to a rule, that is, the cross-sectional area of ​​the bending vibrator structure 6.1 changes with the change of the length of the transmission direction, and the cross-sectional area of ​​the longitudinal vibrator structure 6.2 remains unchanged;

[0043] Furthermore, the radial dimension of the end surface of the dynamic balancing vibration dividing portion 6 close to the vibration node portion 5 is less than or equal to the radial dimension of the clamping mechanism of the vibration node portion 5 .

[0044] Furthermore, the longitudinal-bending composite output part 7 is connected to the tool through a clamping connection mechanism. In order to ensure that the resonant frequency changes within a range after the amplitude converter is installed on the tool and that the motion trajectory follows the theoretical trajectory of the amplitude converter vibration, the radial dimension of the grinding wheel shall not be greater than two-thirds of the radial dimension of the output part.

[0045] Furthermore, the first horn transmission part 2 is cylindrical, the second horn transmission part 3 is truncated cone, and the third horn transmission part 4 is cylindrical; the diameter of the first horn transmission part 2 is equal to the minimum diameter of the second horn transmission part 3, and the diameter of the third horn transmission part 4 is equal to the maximum diameter of the second horn transmission part 3; the purpose is to avoid stress concentration and vibration loss. It should be noted that the number of horn transmission parts can be increased or decreased according to the processing itself.

[0046] Furthermore, the single excitation longitudinal vibration input part 1 includes a connecting part, and the connecting part is connected to the single excitation transducer of longitudinal vibration.

[0047] Furthermore, the vibration node portion 5 includes a horn clamping mechanism, which is a connecting plate or a connecting flange.

[0048] Furthermore, the longitudinal-bending composite output portion 7 is connected to a tool for rotary processing, and is a connecting shaft with connecting holes arranged along the axial direction of the connecting shaft.

[0049] Furthermore, the radial dimension of the end face of the connecting shaft close to the vibration node portion 5 is less than or equal to twice the radial dimension of the end face of the bending vibrator structure 6.1 close to the longitudinal-bending composite output portion 7, mainly for the purpose of effectively clamping and fixing the amplitude transformer to avoid interference.

[0050] The ultrasonic grinding device provided in this embodiment is realized by using a longitudinal bending composite rotating ultrasonic vibration special-shaped horn, such as Figure 2 As shown, it includes a single excitation longitudinal vibration transducer 9, a horn, and a grinding wheel.

[0051] like Figure 2 As shown, the front end of the horn is a single excitation longitudinal vibration input part 1 provided with a threaded column, and the single excitation longitudinal vibration input part 1 is connected to the single excitation longitudinal vibration transducer 9 through the threaded column. Preferably, the single excitation longitudinal vibration transducer 9 is a piezoelectric ultrasonic vibration transducer working in the longitudinal vibration mode.

[0052] The rear end of the horn is provided with an output part for longitudinal and bending vibration. The longitudinal and bending composite output part 7 is a cylinder, and a threaded hole is provided inside it along its axial direction. The longitudinal and bending composite output part 7 is connected to a fixed grinding wheel through the threaded hole. In order to ensure that the resonance frequency changes within the range after the horn is installed with the grinding wheel and the motion trajectory follows the theoretical trajectory of the horn vibration, the radial dimension of the grinding wheel shall not be greater than two-thirds of the radial dimension of the output part.

[0053] A vibration node portion 5 is provided in the middle of the amplitude transformer, and the vibration node portion 5 is an area where the standing wave amplitude is close to 0, where the vibration is close to 0. A amplitude transformer clamping mechanism is provided at the vibration node portion 5, and the amplitude transformer clamping mechanism can be a flange, or holes are opened on both sides, and the amplitude transformer is clamped and fixed by bolts and nuts.

[0054] A dynamically balanced vibration-dividing part 6 is provided between the vibration node part 5 and the longitudinal-bending composite output part 7. The dynamically balanced vibration-dividing part 6 is composed of two bending vibrator structures 6.1 and a longitudinal vibrator structure 6.2 of different shapes. The longitudinal vibrator structure 6.2 is composed of a first longitudinal vibrator 6.2.1 and a second longitudinal vibrator 6.2.2. The mass center of the dynamically balanced vibration-dividing part 6 needs to be located on the rotation center axis of the amplitude transformer. The mass of the bending vibrator structure 6.1 is equal to the mass of the longitudinal vibrator structure 6.2. The mass centers of the bending vibrator structure 6.1 and the longitudinal vibrator structure 6.2 are symmetrical about the rotation center axis. The rotational dynamic balance is always maintained when the amplitude transformer rotates.

[0055] The radial dimension of the cross section of the dynamic balancing vibration-dividing part 6 close to the input part shall not exceed the radial dimension of the node area, so that the connection of the horn will not cause interference.

[0056] The bending vibrator structure 6.1 is a structure with a continuously changing cross-sectional area. In the present embodiment, it is a 180° rotating structure with a trapezoidal longitudinal section. Its function is to convert the longitudinal vibration input by the input part into a bending vibration. By changing the area ratio of the two end faces of the bending vibrator structure 6.1 and increasing the area ratio, the amplitude of the bending vibration will increase. The first longitudinal vibrator 6.2.1 and the second longitudinal vibrator 6.2.2 of the longitudinal vibrator structure 6.2 are respectively square structures with constant cross-sections. Their function is to transmit the longitudinal vibration of the input part and adjust the center of mass position and mass size of the dynamic balance sub-vibrator part 6 and the longitudinal vibrator structure 6.2.

[0057] The rotation center of the longitudinal-bending composite output part 7 needs to be located on the rotation axis of the amplitude transformer, and the radial dimension of the cross-section of the longitudinal-bending composite output part 7 close to the input part shall not be greater than twice the radial dimension of the cross-sectional area of ​​the bending vibrator structure 6.1 of the dynamic balancing vibration-dividing part 6 close to the output part to avoid stress concentration and vibration dissipation.

[0058] Example 2

[0059] This embodiment provides an ultrasonic grinding device implemented by a longitudinal bending composite rotating ultrasonic vibration special-shaped horn, such as Figure 3 , Figure 4 As shown, the structure of this embodiment is substantially the same as that of embodiment 1, except that the bent vibrator structure 6.1 of the dynamic balancing vibration-dividing part 6 of the dynamic balancing rotary ultrasonic horn of this embodiment adopts a structure with a longitudinal section of a trapezoidal shape and a rotation angle of 180° and a generatrix as an exponential. Specifically, the bent vibrator structure 6.1 refers to a trapezoidal 180° rotation structure with a generatrix as an exponential curve.

[0060] Example 3

[0061] This embodiment uses an ultrasonic grinding device that is realized by a longitudinal bending composite rotating ultrasonic vibration special-shaped horn, such as Figure 5 , Figure 6 As shown, the structure of this embodiment is substantially the same as that of Embodiment 1, except that the bending vibrator structure 6.1 of the rotating ultrasonic horn based on dynamic balance in this embodiment does not adopt a rotary structure, but a square structure with a trapezoidal longitudinal cross-sectional area.

[0062] Example 4

[0063] This embodiment uses an ultrasonic grinding device that is realized by a longitudinal bending composite rotating ultrasonic vibration special-shaped horn, such as Figure 7 , Figure 8As shown, the structure in this embodiment is generally consistent with that in Embodiment 3, the difference lies in that the inclined plane of the trapezoidal longitudinal section of the bending vibrator structure 6.1 of the rotating ultrasonic horn based on dynamic balance in this embodiment is changed into a curved surface, the generatrix of the curved surface is an exponential curve, and the longitudinal-bending composite output part 7 uses a square structure, and a threaded hole is opened in the center of the square structure to realize the connection with the grinding wheel.

[0064] Example 5

[0065] This embodiment uses an ultrasonic grinding device that is realized by a longitudinal bending composite rotating ultrasonic vibration special-shaped horn, such as Fig. 9 As shown, the structure of this embodiment is generally consistent with that of embodiment 4, except that, in this embodiment, the rotary processing tool 8 is installed in the threaded hole through a threaded rod, and the radial dimension of the rotary processing tool 8 in this embodiment is smaller than the radial dimension of the output part.

[0066] Example 6

[0067] This embodiment uses an ultrasonic grinding device that is realized by a longitudinal bending composite rotating ultrasonic vibration special-shaped horn, such as Fig.10 , Fig.11 As shown, the structure in this embodiment is generally consistent with that in Embodiment 1, the difference is that the grinding tool in this embodiment adopts a structure in which the amplitude variable rod and the grinding wheel are integrated, that is, when designing the amplitude variable rod, the structural shape is designed as a part of the amplitude variable rod, and the amplitude variable rod material is used as the grinding wheel base material, and abrasive grains are plated on this part later.

[0068] Example 7

[0069] like Fig.12 , Fig.13 , Fig.14As shown, this embodiment also provides a longitudinal-bending composite rotating ultrasonic vibration special-shaped amplitude transformer, and the amplitude transformer is composed of a single-excitation longitudinal vibration input part 1, an amplitude transformer transmission part, a vibration node part 5, a dynamic balance vibration separation part 6, and a longitudinal-bending composite output part 7 from the input part to the output part; wherein the single-excitation longitudinal vibration input part 1, the amplitude transformer transmission part, the vibration node part 5 and the longitudinal-bending composite output part 7 are coaxially arranged, and the single-excitation longitudinal vibration input part 1, the amplitude transformer transmission part, the vibration node part 5 and the longitudinal-bending composite output part 7 are all centrally symmetrical structures; the difference from Embodiments 1 to 6 is that: the structure of the dynamic balance vibration separation part 6 is different. In this embodiment, the dynamic balance vibration separation part 6 includes a longitudinal vibrator structure 6.2 and a bending vibrator structure 6.1, and the bending vibrator structure 6.1 includes a first bending vibrator 6.1.1, a second bending vibrator 6.1.2 and a third bending vibrator 6.1.3, and the longitudinal vibrator structure 6.2 is a A cylinder with a single excitation longitudinal vibration input part 1, a transformer transmission part, a vibration node part 5 and a longitudinal-bending composite output part 7 arranged coaxially, wherein the first bending vibrator 6.1.1 and the second bending vibrator 6.1.2 are symmetrically arranged at positions close to the end face of the cylinder; the third bending vibrator 6.1.3 is located at the center of the side of the cylinder, and the sum of the masses of the first bending vibrator 6.1.1 and the second bending vibrator 6.1.2 is equal to the mass of the third bending vibrator 6.1.3, and the combined center of mass of the first bending vibrator 6.1.1 and the second bending vibrator 6.1.2 is axially symmetrical with the center of mass of the third bending vibrator 6.1.3; the cross-sectional areas of the first bending vibrator 6.1.1, the second bending vibrator 6.1.2 and the third bending vibrator 6.1.3 are equal, and the overall center of mass of the longitudinal vibrator structure 6.2 and the bending vibrator structure 6.1 are at the center of rotation; wherein the amplitude of the bending vibration of the transformer is affected by r1, r2, and d, as shown in detail Fig.14 As shown, when r1 or d increases and r2 decreases, the bending vibration amplitude can increase; wherein r1 represents the arc radius of the three bending vibrator arc segments; r2 represents the radius of the longitudinal vibrator; d represents the distance between the center of the bending vibrator arc segment and the center of the longitudinal vibrator.

[0070] The special-shaped horn suitable for rotary processing provided in the above-mentioned multiple embodiments can not only transmit ultrasonic vibration and change the amplitude of ultrasonic vibration, but also change the vibration mode, converting the single-excitation longitudinal vibration into a longitudinal-bending composite vibration, thereby avoiding the dynamic imbalance problem in the rotation process. The special-shaped horn suitable for rotary processing provided in the above-mentioned multiple embodiments, the longitudinal-bending composite output part 7 can be directly connected to any tool head that needs to rotate and vibrate longitudinally and bendingly, realizing the longitudinal-bending vibration while avoiding the dynamic imbalance problem caused by the rotation of the traditional longitudinal-bending horn; the single-excitation longitudinal vibration transducer 9 can indirectly drive the tool head that needs to be rotated to perform longitudinal-bending vibration through a rotating ultrasonic vibration longitudinal-bending composite horn based on dynamic balance provided by the patent of the present invention. The special-shaped horn suitable for rotary processing provided by the patent of the present invention has a simple structure and a wide range of applications.

[0071] The above is a detailed introduction to the specific implementation methods of the patent of the present invention. For those skilled in the art, the present invention may be modified and improved without departing from the principles of the present invention. These modifications and improvements also fall within the scope of protection of the patent of the present invention.

Claims

1. A longitudinal bending composite rotating ultrasonic vibration special-shaped horn, characterized in that: The amplitude transformer comprises, from the input part to the output part, a single excitation longitudinal vibration input part, an amplitude transformer transmission part, a vibration node part, a dynamic balance vibration separation part, and a longitudinal-bending composite output part; wherein, the single excitation longitudinal vibration input part, the amplitude transformer transmission part, the vibration node part, and the longitudinal-bending composite output part are coaxially arranged, and the single excitation longitudinal vibration input part, the amplitude transformer transmission part, the vibration node part, and the longitudinal-bending composite output part are all centrally symmetrical structures, the dynamic balance vibration separation part comprises a bending vibrator structure and a longitudinal vibrator structure with different cross-sectional areas, the masses of the bending vibrator structure and the longitudinal vibrator structure are equal, and the center of mass of the bending vibrator structure and the longitudinal vibrator structure are symmetrically arranged about the axis of the rotation axis of the amplitude transformer, and the longitudinal vibrator structure consists of a first longitudinal vibrator and a second longitudinal vibrator with different cross-sectional areas.

2. The longitudinal-bending composite rotating ultrasonic vibration special-shaped horn according to claim 1, characterized in that: The longitudinal section of the curved vibrator structure is a trapezoidal or quasi-trapezoidal structure; the first longitudinal vibrator and the second longitudinal vibrator are square structures with unchanged cross sections.

3. The longitudinal-bending composite rotating ultrasonic vibration special-shaped horn according to claim 1, characterized in that: The center of mass of the dynamic balancing vibration-dividing part is on the axis of the horn rotating shaft.

4. The longitudinal-bending composite rotating ultrasonic vibration special-shaped horn according to claim 1, characterized in that: The radial dimension of the end surface of the dynamic balancing vibration dividing part close to the vibration node part is less than or equal to the radial dimension of the clamping mechanism of the vibration node part.

5. The longitudinal-bending composite rotating ultrasonic vibration special-shaped horn according to claim 1, characterized in that: The longitudinal-bending composite output part is connected to a tool via a clamping connection mechanism, and the radial dimension of the tool is less than or equal to two-thirds of the radial dimension of the output part.

6. The longitudinal-bending composite rotating ultrasonic vibration special-shaped horn according to claim 1, characterized in that: The amplitude transformer transmission part includes three parts, which are a first cylinder, a cone and a second cylinder in order from the input part to the output part; the diameter of the first cylinder is equal to the minimum diameter of the cone, and the diameter of the second cylinder is equal to the maximum diameter of the cone.

7. The longitudinal-bending composite rotating ultrasonic vibration special-shaped horn according to claim 1, characterized in that: The vibration node part includes a clamping mechanism, which is a connecting plate or a connecting flange.

8. The longitudinal-bending composite rotating ultrasonic vibration special-shaped horn as claimed in claim 1, characterized in that: The longitudinal-bending compound output part is connected to a tool for rotary processing. The longitudinal-bending compound output part is a connecting shaft, and a connecting hole is arranged along the axial direction of the connecting shaft.

9. The longitudinal-bending composite rotating ultrasonic vibration special-shaped horn according to claim 1, characterized in that: The radial dimension of the end face of the connecting shaft close to the vibration node portion is less than or equal to twice the radial dimension of the end face of the bending vibrator structure close to the longitudinal-bending composite output portion.

10. A longitudinal bending composite rotating ultrasonic vibration special-shaped horn, characterized in that: The amplitude transformer comprises, from the input part to the output part, a single excitation longitudinal vibration input part, an amplitude transformer transmission part, a vibration node part, a dynamic balance vibration separation part, and a longitudinal-bending composite output part; wherein, the single excitation longitudinal vibration input part, the amplitude transformer transmission part, the vibration node part, and the longitudinal-bending composite output part are coaxially arranged, and the single excitation longitudinal vibration input part, the amplitude transformer transmission part, the vibration node part, and the longitudinal-bending composite output part are all centrally symmetrical structures; the dynamic balance vibration separation part comprises a longitudinal vibrator structure and a bending vibrator structure, and the bending vibrator structure comprises a first bending vibrator, a second bending vibrator, and a third bending vibrator, and the longitudinal vibrator structure is a cylinder, and the first bending vibrator and the second bending vibrator are symmetrically arranged at positions close to the end face of the cylinder; the third bending vibrator is located at the center of the side of the cylinder, and the sum of the masses of the first bending vibrator and the second bending vibrator is equal to the mass of the third bending vibrator, and the combined center of mass of the first bending vibrator and the second bending vibrator is axially symmetrical with the center of mass of the third bending vibrator.

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