Ultrasonic vibration mechanism

Abstract

The utility model relates to the technical field of machining, and discloses an ultrasonic vibration mechanism which comprises an amplitude-change pole, a piezoelectric ceramic unit and a cover plate, and the piezoelectric ceramic unit and the cover plate are sequentially arranged on the amplitude-change pole. A connecting flange is arranged on the periphery of the amplitude-change pole, a vibration reduction groove is formed in the connecting flange, and the vibration reduction groove is filled with a flexible body. According to the utility model, the overall structural rigidity of the mechanism can be improved under the condition of reducing the ultrasonic energy loss at the connecting flange, so that the machining efficiency and the machining precision of ultrasonic cutting are ensured.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing technology, and more specifically, to an ultrasonic vibration mechanism. Background Technology

[0002] Ultrasonic machining, due to the ultrasonic energy at the tool tip, is widely used in aerospace, power generation, and automotive manufacturing, especially for machining non-metallic, hard and brittle materials, as well as for machining micro-holes and deep holes, achieving better machining performance. Ultrasonic machining devices typically use an amplitude transformer with a piezoelectric ceramic plate connected to an external ultrasonic power source, which drives the amplitude transformer to generate ultrasonic vibrations. However, when the amplitude transformer is connected to an external machine tool through a housing, vibration damping grooves are incorporated to reduce ultrasonic energy loss. Currently, the vibration damping effect of the amplitude transformer in ultrasonic machining devices is poor, and the damping grooves also result in poor structural rigidity of the amplitude transformer, thus affecting the machining performance and efficiency of the ultrasonic machining device. Summary of the Invention

[0003] The purpose of this invention is to address the technical problems existing in the prior art by providing an ultrasonic vibration mechanism that can improve the efficiency of ultrasonic vibration transmission, thereby improving processing efficiency.

[0004] To solve the problems mentioned above, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides an ultrasonic vibration mechanism, including an amplitude transformer, a piezoelectric ceramic unit, and a cover plate, wherein the piezoelectric ceramic unit and the cover plate are sequentially arranged on the amplitude transformer; a connecting flange is provided on the outer periphery of the amplitude transformer, and a vibration damping groove is provided on the connecting flange, wherein the vibration damping groove is filled with a flexible body.

[0006] Furthermore, the connecting flange is provided with a first damping ring groove and a second damping ring groove along the axial direction of the luffing rod, respectively. The first damping ring groove is located on the side of the second damping ring groove away from the surface of the luffing rod, and the depth of the first damping ring groove along the axial direction of the luffing rod is less than that of the second damping ring groove.

[0007] Furthermore, the first damping ring groove is provided with multiple damping through grooves, and the second damping ring groove is provided with multiple damping recesses. The damping through grooves pass through the two opposite sides of the connecting flange, and the positions of the damping through grooves and the damping recesses correspond to each other.

[0008] Furthermore, the first damping ring groove and / or damping through groove are respectively filled with flexible material, and the second damping ring groove and / or damping groove are also respectively filled with flexible material.

[0009] Furthermore, the amplitude transformer is provided with a water outlet channel, and the connecting flange is provided with a water inlet channel communicating with the water outlet channel.

[0010] Furthermore, it also includes a positioning pin, which is located at the end of the water outlet channel on the amplitude rod, and the positioning pin has a through hole communicating with the water outlet channel.

[0011] Furthermore, the diameter of the piezoelectric ceramic unit is d1, the diameter of the first damping ring groove is d3, and the diameter of the second damping ring groove is d4, satisfying the following:

[0012]

[0013] Furthermore, the end face of the amplitude rod is provided with one or more comb tooth recesses or comb tooth protrusions, the axes of each set of comb tooth recesses or comb tooth protrusions are arranged in parallel, and the axes of two or more sets of comb tooth recesses or comb tooth protrusions are arranged intersecting.

[0014] Furthermore, the maximum outer diameter of the amplitude transformer is d2, and the tooth depth H and the number of teeth N of the comb teeth in the concave or convex portion of the comb teeth on the amplitude transformer satisfy the following:

[0015]

[0016] Where c is the sound velocity of the material, P is the comb tooth pitch, f is the ultrasonic vibration frequency, and α is the comb tooth angle.

[0017] Furthermore, the connecting flange of the amplitude rod is connected to the end face of the housing, and the inner wall of the housing is provided with a positioning block, the end of which abuts against the outer peripheral surface of the cover plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] In this invention, a piezoelectric ceramic unit is installed on the amplitude transformer, and a vibration damping groove is provided on the amplitude transformer. The vibration damping groove is filled with a flexible body, which can reduce the ultrasonic energy loss at the connecting flange and improve the overall structural rigidity of the mechanism, thereby ensuring the processing efficiency and accuracy of ultrasonic cutting, and also improving the actual processing efficiency. Attached Figure Description

[0020] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a structural diagram of the ultrasonic vibration mechanism of this utility model.

[0022] Figure 2 This is another structural diagram of the ultrasonic vibration mechanism of this utility model.

[0023] Figure 3 This is a cross-sectional view of the ultrasonic vibration mechanism of this utility model.

[0024] Figure 4 This is a left view of the ultrasonic vibration mechanism of this utility model.

[0025] Figure 5 This is a diagram illustrating the practical application of the ultrasonic vibration mechanism of this utility model.

[0026] Figure 6 This is the front view of the ultrasonic vibration mechanism of this utility model.

[0027] Figure 7 This is a schematic diagram of the comb tooth structure in this utility model.

[0028] Figure 8 This is an installation diagram of the ultrasonic vibration mechanism of this utility model and the machine tool.

[0029] Figure 9 This is a cross-sectional view showing the installation of the ultrasonic vibration mechanism of this utility model with a machine tool.

[0030] Figure 10 This is another embodiment of the ultrasonic vibration mechanism and machine tool of this utility model.

[0031] Among them, 10-shell, 20-amplifier rod, 30-tool head, 21-connecting flange, 40-piezoelectric ceramic unit, 41-cover plate, 42-locking part, 43-positioning block, 22-comb tooth recess, 23-positioning pin, 31-comb tooth protrusion, 24-first damping ring groove, 25-second damping ring groove, 241-dampening through groove, 251-dampening groove, 26-flexible body, 27-water outlet channel, 28-water inlet channel, 50-mounting base. Detailed Implementation

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as “length,” “width,” “upper,” “lower,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate orientations or positions based on the orientations or positions shown in the accompanying drawings and are merely for ease of description and should not be construed as limiting the invention.

[0033] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion; the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a particular order. In the specification, claims, and accompanying drawings of this utility model, when an element is referred to as "fixed to," "mounted to," "set on," or "connected to" another element, it can be directly or indirectly located on that other element. For example, when an element is referred to as "connected to" another element, it can be directly or indirectly connected to that other element.

[0034] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] See Figures 1 to 3 As shown, this utility model provides an ultrasonic vibration mechanism, including an amplitude transformer 20, a piezoelectric ceramic unit 40, and a cover plate 41. The piezoelectric ceramic unit 40 and the cover plate 41 are sequentially arranged on the amplitude transformer 20. The cover plate 41 is located on the side of the piezoelectric ceramic unit 40 away from the amplitude transformer 20 and fixes the piezoelectric ceramic unit 40 to ensure the stability of the installation of the piezoelectric ceramic unit 40.

[0036] The outer periphery of the amplitude rod 20 extends radially to form a connecting flange 21. The connecting flange 21 is provided with a vibration damping groove to reduce ultrasonic energy loss. The vibration damping groove of the connecting flange 21 is filled with a flexible body 26 to improve the structural rigidity of the amplitude rod 20 and the connecting flange 21.

[0037] Specifically, the piezoelectric ceramic unit 40 is fitted to the end face of the amplitude transformer 20 and pressed together by the cover plate 41. The locking member 42 passes through the cover plate 41 and the piezoelectric ceramic unit 40 in sequence and connects to the amplitude transformer 20, thereby ensuring the reliability of the connection and cooperation between the piezoelectric ceramic unit 40 and the amplitude transformer 20. Understandably, the locking member 42 can be a pre-tightening screw or other fastener. In other embodiments, the cover plate 41 and the piezoelectric ceramic unit 40 can also be sequentially fitted onto the outer periphery of the amplitude transformer 20, and the cover plate 41 can be fixed by bolts or other locking members, which can also ensure a reliable connection and cooperation between the piezoelectric ceramic unit 40 and the amplitude transformer 20.

[0038] Specifically, a tool head 30 is provided at the end of the amplitude transformer 20, and a connecting flange 21 is connected to the end face of the housing 10. The connecting flange 21 is set as the vibration zero point. The piezoelectric ceramic unit 40 drives the amplitude transformer 20 and the tool head 30 to perform ultrasonic vibration. The amplitude transformer 20 is provided with vibration damping grooves to reduce ultrasonic energy loss and improve the efficiency of ultrasonic energy transmission to the tool head 30.

[0039] To improve the stability of the piezoelectric ceramic unit 40 mounted on the amplitude transformer 20, a positioning block 43 is provided on the inner wall of the housing 10. The end of the positioning block 43 abuts against the outer peripheral surface of the cover plate 41. By positioning the cover plate 41, the piezoelectric ceramic unit 40 can be reliably positioned.

[0040] In one embodiment, see Figure 1 , Figure 3 , Figure 4 As shown, the connecting flange 21 is provided with a first damping ring groove 24 and a second damping ring groove 25 along the axial direction of the amplitude rod 20. The first damping ring groove 24 is located on the side of the second damping ring groove 25 away from the surface of the amplitude rod 20, and the depth of the first damping ring groove 24 along the axial direction of the amplitude rod 20 is less than that of the second damping ring groove 25.

[0041] Specifically, a first damping ring groove 24 and a second damping ring groove 25 are respectively provided on the connecting flange 21. Compared with only one damping ring groove, the damping effect can be improved. In order to ensure the structural rigidity of the amplitude transformer 20, the depth of the first damping ring groove 24 is smaller than that of the second damping ring groove 25. The number and depth of the damping ring grooves can also be adjusted according to actual needs, thereby ensuring the reliability of the amplitude transformer 20 in ultrasonic vibration and energy transmission.

[0042] In one embodiment, the first damping ring groove 24 is provided with a plurality of damping through grooves 241, and the second damping ring groove 25 is provided with a plurality of damping grooves 251. The damping through grooves 241 penetrate through the opposite sides of the connecting flange 21, and the positions of the damping through grooves 241 and the damping grooves 251 correspond to each other, which further improves the damping effect of the connecting flange 21.

[0043] Specifically, the vibration damping through-slots 241 and vibration damping grooves 251 are both arc-shaped grooves, and multiple grooves are provided along the circumference of the amplitude transformer 20. Adjacent vibration damping through-slots 241 and adjacent vibration damping grooves 251 are spaced apart, ensuring both reliable vibration damping and structural rigidity of the amplitude transformer 20. Understandably, the number of vibration damping through-slots 241 and vibration damping grooves 251 can be increased or decreased according to the dimensions of the connecting flange 21.

[0044] In one embodiment, the first damping ring groove 24 and / or the damping through groove 241 are respectively filled with flexible bodies 26, and the second damping ring groove 25 and / or the damping groove 251 are also respectively filled with flexible bodies 26. While achieving the damping effect, this can improve the structural rigidity of the connecting flange 21.

[0045] Specifically, Figure 5 As shown, since the connecting flange 21 is connected to the housing 10, the ultrasonic energy loss at the connecting flange 21 can be reduced by setting the vibration damping ring groove, but the structural rigidity of the connecting flange 21 is also reduced. The flexible body 26 filled in the vibration damping ring groove can play a supporting role, improve the structural rigidity of the connecting flange 21, and thus ensure the installation reliability of the connecting flange 21 and the housing 10.

[0046] In one embodiment, see further. Figure 1 , Figure 2 , Figure 7 As shown, the end of the amplitude rod 20 is provided with a comb tooth recess or comb tooth protrusion. The amplitude rod 20 and the tool head 30 are engaged by a comb tooth structure, which enables the tool head 30 to be detachably installed and improves the stability of the connection between the amplitude rod 20 and the tool head 30.

[0047] Specifically, the end face of the amplitude transformer 20 is provided with multiple radially parallel comb-tooth recesses 22, and the end face of the tool head 30 is provided with multiple radially parallel comb-tooth protrusions 31. The comb-tooth recesses 22 and comb-tooth protrusions 31 mesh with each other to prevent the tool head 30 from shifting its installation position when the amplitude transformer 20 drives the tool head 30 to perform ultrasonic vibration under the action of the piezoelectric ceramic unit 40, thereby improving the installation stability of the tool head 30. Understandably, the end face of the amplitude transformer 20 can also be provided with comb-tooth protrusions, and the end face of the tool head 30 can be provided with comb-tooth recesses, which can also achieve reliable connection and engagement between the amplitude transformer 20 and the tool head 30.

[0048] Specifically, a locating pin 23 is also provided on the end face of the amplitude rod 20. Figure 3 As shown in the figure, this avoids the comb tooth recess 22 and comb tooth protrusion 31 from moving when the amplitude rod 20 is subjected to ultrasonic vibration, thereby improving the positioning accuracy of both the amplitude rod 20 and the tool head 30.

[0049] Understandably, the end face of the amplitude transformer 20 can be provided with two or more sets of comb tooth recesses 22 with parallel axes along the radial direction, and the axes of the two or more sets of comb tooth recesses 22 are arranged intersectingly. Similarly, the end face of the tool head 30 is also provided with two sets of comb tooth protrusions 31 that mesh with the comb tooth recesses 22 along the radial direction, which increases the contact area between the amplitude transformer 20 and the tool head 30 and further improves the installation stability of both the amplitude transformer 20 and the tool head 30.

[0050] In one embodiment, see further. Figure 3As shown, the luffing rod 20 is provided with an outlet channel 27 along the axial direction, and the luffing rod 20 is also provided with an inlet channel 28 that communicates with the outlet channel 27.

[0051] The liquid medium enters the amplitude transformer 20 through the inlet channel 28, flows into the tool head 30 after passing through the outlet channel 27, and can cool the amplitude transformer 20 and the tool head 30. At the same time, the liquid medium acts on the material surface, which can clean the machining debris on the material surface. Under certain working conditions, it can also form a cavitation effect on the material surface, improving the machining quality of the material surface.

[0052] Specifically, the water outlet channel 27 can be located at the center of the amplitude transformer 20 and connected to the end of the water outlet channel on the tool head 30, facilitating processing and achieving uniform cooling. The water inlet channel 28 is arranged radially along the amplitude transformer 20. Since the connecting flange 21 is the vibration zero point, the water inlet channel 28 is located on the connecting flange 21, allowing the liquid medium to reliably enter the water inlet channel 28 and smoothly enter the water outlet channel 27.

[0053] Specifically, the positioning pin 23 is located on the mating surface of the amplitude rod 20 and the tool head 30, and is located at the connection of the water outlet channels of the two. The positioning pin 23 is also provided with a through hole that communicates with the water outlet channel.

[0054] In this embodiment, the amplitude transformer 20 and the tool head 30 are engaged by the comb tooth recess 22 and the comb tooth protrusion 31, and the stability and reliability of their connection are further ensured by the positioning pin 23. The positioning pin 23 is located at the connection of the water outlet channels of the two and has a through hole communicating with the water outlet channels. The positioning pin 23 serves both to connect and position the components and to provide a seal to prevent leakage of the liquid medium.

[0055] In one embodiment, see Figure 4 and Figure 6 As shown, the diameter of the piezoelectric ceramic unit 40 is d1, the diameter of the first damping ring groove 24 is d3, and the diameter of the second damping ring groove 25 is d4, then the following conditions are met:

[0056]

[0057] Specifically, n1 and n2 can be 1, 1.2, 1.5, or any value within the range, and can be determined according to the dimensions of the connecting flange 21. The diameters of the first damping ring groove 24 and the second damping ring groove 25 meet the above requirements, which can achieve a reliable damping effect and ensure the structural rigidity of the amplitude transformer 20 and the connecting flange 21.

[0058] In one embodiment, both the damping through groove 241 and the damping groove 251 have arc-shaped ends with radii R≥1, i.e., R1≥1 and R2≥1, which facilitates the processing of both structures and ensures the damping effect.

[0059] In one embodiment, see Figure 6 and Figure 7 As shown, the maximum outer diameter of the amplitude transformer 20 is d2. The tooth depth H and the number of teeth N of the comb structure on the amplitude transformer 20 satisfy:

[0060]

[0061] Where c is the material sound velocity, P is the comb tooth pitch, f is the ultrasonic vibration frequency, and α is the comb tooth angle, all of which are known values. n3 and n4 can take values ​​of 1, 1.5, 2, 2.5, or any other arbitrary value, all of which can ensure the stability and reliability of the connection between the amplitude transformer 20 and the tool head 30. α can also be selected according to actual needs, with α preferably being 60° to ensure the reliability of the meshing connection between the amplitude transformer 20 and the tool head 30.

[0062] See Figure 8 and Figure 9 As shown, the ultrasonic vibration mechanism provided by this utility model is connected to an external machine tool through a mounting base 50. The mounting base 50 and the outer shell 10 are elastically clamped together, which facilitates the adjustment of the mounting angles of the tool head 30 and the cutting blade 60 at the end of the amplitude rod 20 relative to the machine tool, thereby meeting different processing requirements.

[0063] Understandably, the amplitude transformer 20 and the tool head 30 are coupled using a comb-tooth structure, and the tool head 30 can be detachably mounted on the amplitude transformer 20, facilitating replacement of the tool head 30 according to different processing requirements. For example... Figure 8 The tool head 30 shown is used for cutting the material, while Figure 10 The tool head 30 shown is used for turning materials. In other cases, different tool heads 30 with different structures can be replaced as needed to achieve different processing effects.

[0064] The ultrasonic vibration mechanism provided by this utility model has a water outlet channel on the amplitude transformer 20, which facilitates the introduction of liquid medium to cool the amplitude transformer 20 and the tool head 30, and can also clean the machining debris on the material surface, thereby improving the machining accuracy of the material. The connecting flange 21 of the amplitude transformer 20 is provided with vibration damping ring grooves (24, 25), which are filled with flexible bodies 26 respectively. This can reduce ultrasonic energy loss and improve the overall structural rigidity, thereby ensuring the machining efficiency and machining accuracy of ultrasonic cutting.

[0065] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. An ultrasonic vibration mechanism, characterized in that: It includes an amplitude transformer, a piezoelectric ceramic unit, and a cover plate, with the piezoelectric ceramic unit and the cover plate sequentially arranged on the amplitude transformer; the outer periphery of the amplitude transformer is provided with a connecting flange, and the connecting flange is provided with a vibration damping groove, which is filled with a flexible material.

2. The ultrasonic vibration mechanism according to claim 1, characterized in that: The connecting flange is provided with a first damping ring groove and a second damping ring groove along the axial direction of the luffing rod. The first damping ring groove is located on the side of the second damping ring groove away from the surface of the luffing rod, and the depth of the first damping ring groove along the axial direction of the luffing rod is less than that of the second damping ring groove.

3. The ultrasonic vibration mechanism according to claim 2, characterized in that: The first damping ring groove is provided with multiple damping through grooves, and the second damping ring groove is provided with multiple damping grooves. The damping through grooves pass through the two opposite sides of the connecting flange, and the positions of the damping through grooves and the damping grooves correspond to each other.

4. The ultrasonic vibration mechanism according to claim 3, characterized in that: The first damping ring groove and / or damping through groove are respectively filled with flexible material, and the second damping ring groove and / or damping groove are also respectively filled with flexible material.

5. The ultrasonic vibration mechanism according to any one of claims 1 to 4, characterized in that: The amplitude transformer is provided with a water outlet channel, and the connecting flange is provided with a water inlet channel that communicates with the water outlet channel.

6. The ultrasonic vibration mechanism according to claim 5, characterized in that: It also includes a positioning pin, which is located at the end of the water outlet channel on the amplitude rod, and the positioning pin has a through hole communicating with the water outlet channel.

7. The ultrasonic vibration mechanism according to claim 2, characterized in that: The diameter of the piezoelectric ceramic unit is d1, the diameter of the first damping ring groove is d3, and the diameter of the second damping ring groove is d4, satisfying the following:

8. The ultrasonic vibration mechanism according to claim 1, characterized in that: The end face of the amplitude rod is provided with one or more comb tooth recesses or comb tooth protrusions. The axes of each set of comb tooth recesses or comb tooth protrusions are arranged in parallel, and the axes of two or more sets of comb tooth recesses or comb tooth protrusions are arranged intersecting.

9. The ultrasonic vibration mechanism according to claim 6, characterized in that: The maximum outer diameter of the amplitude transformer is d2, and the tooth depth H and the number of teeth N of the comb teeth concave or convex portion on the amplitude transformer satisfy the following: Where c is the sound velocity of the material, P is the comb tooth pitch, f is the ultrasonic vibration frequency, and α is the comb tooth angle.

10. The ultrasonic vibration mechanism according to claim 1, characterized in that: The connecting flange of the amplitude rod is connected to the end face of the housing, and the inner wall of the housing is provided with a positioning block, the end of which abuts against the outer peripheral surface of the cover plate.

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