Ultrasonic turning mechanism and device

Abstract

The utility model relates to the technical field of machining, and discloses an ultrasonic turning mechanism and device, the ultrasonic turning mechanism comprises a transducer, the transducer comprises a multi-stage amplitude-change pole and an ultrasonic assembly, the ultrasonic assembly is arranged on the multi-stage amplitude-change pole, and the multi-stage amplitude-change pole is used for adjusting ultrasonic amplitude; the composite tool bit is arranged at the end part of the multi-stage amplitude-change pole; and the composite tool bit realizes multi-station ultrasonic turning processing under the action of the transducer. According to the multi-station ultrasonic turning device, multi-station ultrasonic turning can be achieved, the working efficiency and the machining precision of turning can be improved, ultrasonic vibration output is stable, ultrasonic cutting modes are diversified, rigidity is high, and universality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, and more specifically, to an ultrasonic turning mechanism and device. Background Art

[0002] With the continuous development of fields such as automobiles, new energy, and consumer electronics, higher requirements are put forward for material properties and processing quality. For example, high-strength, high-hardness, and low-density materials are widely used, and the required precision machining accuracy and surface quality are also improved, which puts more stringent requirements on processing equipment. Taking turning as an example, traditional turning cannot meet the requirements of high-efficiency and high-quality machining for the above new materials and new processes, with fast tool wear, poor machining surface quality, and inability to meet dimensional accuracy requirements. Ultrasonic machining has its unique machining advantages for hard and brittle materials and composite materials, and can solve the problems that traditional turning cannot overcome.

[0003] However, the current ultrasonic turning has problems such as single vibration mode, poor machining stability, insufficient rigidity, and low versatility, resulting in unstable machining quality. It is mostly used for mechanistic machining test research in laboratories and is difficult to be popularized to large-scale industrial applications. Summary of the Invention

[0004] The purpose of the utility model is to provide an ultrasonic turning mechanism and device for solving the technical problems existing in the prior art, which can realize multi-station ultrasonic turning machining and improve the working efficiency and machining accuracy of turning machining.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0006] The utility model provides an ultrasonic turning mechanism, including:

[0007] A transducer, including a multi-stage horn and an ultrasonic component, the ultrasonic component is arranged on the multi-stage horn, and the multi-stage horn is used to adjust the ultrasonic vibration mode;

[0008] A composite tool bit, arranged at the end of the multi-stage horn; under the action of the transducer, the composite tool bit realizes multi-station ultrasonic turning machining.

[0009] Further, the multi-stage horn includes a plurality of horn units arranged in sequence along the axial direction of the support housing, each horn unit has a large diameter end D and a small diameter end d, and the length of each horn unit is L, satisfying d / D < 1 and D < 4 / 5L;

[0010] And / or, the horn unit has a tapered transition part or a tapered step part, and the cross-sectional area perpendicular to the axis of the tapered transition part or the tapered step part gradually decreases along the transmission direction of the ultrasonic amplitude.

[0011] Furthermore, the composite cutter head includes a cutter rod, multiple groups of mounting arms and multiple cutter grains. The cutter rod is arranged at the end of a multi-stage amplitude-changing rod, and multiple groups of mounting arms are arranged on the periphery of the cutter rod; a cutter grain is arranged at the end of each group of mounting arms, and the blade portion of the cutter grain is arranged away from the axis of the cutter rod.

[0012] Furthermore, each group of mounting arms comprises a first mounting arm and a second mounting arm which are arranged on both sides of the knife rod axis and are opposite to each other, and the ultrasonic vibration modes of the knife particles on the first mounting arm and the second mounting arm are consistent.

[0013] Furthermore, a knife pressing block is arranged on the mounting arm, one end of the knife pressing block is arranged on the mounting arm, and the other end of the knife pressing block is abutted and matched with the surface of the corresponding knife particle.

[0014] Furthermore, the included angle between the installation axis of the installation arm and the axis of the knife rod is 0° to 175°.

[0015] Furthermore, the included angle between the installation axis of the knife particle and the axis of the knife rod is α, 0°≤α≤180°.

[0016] Furthermore, a frequency modulation protrusion is also provided at the end of the knife rod, and the frequency modulation protrusion is located on a side of the mounting arm away from the supporting shell.

[0017] Furthermore, it also includes a supporting shell, the supporting shell has a containing cavity; the ultrasonic component is placed in the containing cavity of the supporting shell, and the multi-stage horn part is arranged in the containing cavity of the supporting shell;

[0018] At least one supporting flange is arranged on the periphery of the multi-stage amplitude transformer, each of the supporting flanges is connected to the supporting shell, and each of the supporting flanges is set as a vibration zero point.

[0019] Furthermore, one of the support flanges is connected and matched with the end of the support shell, and the support flange is provided with a plurality of annular grooves along the circumferential direction; and a plurality of positioning holes are provided on the support shell, and the positions of the annular grooves and the positioning holes correspond to each other.

[0020] The utility model also provides an ultrasonic turning device, comprising the ultrasonic turning mechanism and a holder, wherein the holder comprises a clamping portion, a connecting portion and a positioning portion arranged on the outer periphery of the clamping portion;

[0021] The clamping part is arranged on the outer periphery of the supporting shell to elastically clamp the supporting shell; the connecting part is connected with the machine tool, and the positioning part connects the clamping part with the supporting shell.

[0022] Furthermore, a mounting flange for connecting and cooperating with a machine tool is provided on the outer periphery of the frequency modulation protrusion on the tool rod.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] The ultrasonic turning mechanism of the present utility model drives the multi-stage amplitude transformer and the composite tool bit to perform ultrasonic vibration through the ultrasonic component, and adopts the composite tool bit, which can realize the ultrasonic turning processing of materials at multiple working positions, improving the working efficiency and processing accuracy of turning processing; while the ultrasonic turning device is connected and matched with the ultrasonic turning mechanism through the holding seat, meeting the matching installation of ultrasonic turning mechanisms of different sizes with the machine tool, with strong versatility, stable ultrasonic vibration output, diverse ultrasonic cutting modes and high rigidity of the whole device, and can also meet different processing requirements. Brief Description of the Drawings

[0025] In order to more clearly illustrate the solutions in the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts. Among them:

[0026] Figure 1 is the structural diagram of the ultrasonic turning mechanism in the present utility model.

[0027] Figure 2 is the cross-sectional view of the ultrasonic turning mechanism in the present utility model.

[0028] Figure 3 is the partial schematic diagram of the multi-stage amplitude transformer in the present utility model.

[0029] Figure 4 is the partial schematic diagram of the ultrasonic turning mechanism in the present utility model.

[0030] Figure 5 is the partial schematic diagram of the support housing in the present utility model.

[0031] Figure 6 is the structural diagram of the second example of the tool bar in the present utility model.

[0032] Figure 7 is the structural diagram of the ultrasonic turning device in the present utility model.

[0033] Figure 8 is the front view of the ultrasonic turning device in the present utility model.

[0034] Figure 9 is the top view of the ultrasonic turning device in the present utility model.

[0035] Figure 10 is the partial schematic diagram of the tool bar in the present utility model.

[0036] Figure 11This is a partial schematic view of the tool shank in the present utility model.

[0037] Figure 12 This is a partial parameter diagram of the multi-stage amplitude transformer in the present utility model.

[0038] Wherein, 100 - ultrasonic turning mechanism, 10 - support housing, 101 - positioning hole;

[0039] 20 - multi-stage amplitude transformer, 21 - first amplitude transformer, 22 - second amplitude transformer, 211 - tapered transition part, 221 - tapered step part, 231 - first support flange, 232 - second support flange, 2321 - annular groove, 24 - mounting hole; 30 - ultrasonic component;

[0040] 40 - composite tool bit, 41 - tool shank, 421 - first mounting arm, 422 - second mounting arm, 423 - third mounting arm, 424 - fourth mounting arm, 431 - first cutting insert, 432 - second cutting insert, 433 - third cutting insert, 434 - fourth cutting insert, 44 - tool clamping block, 45 - frequency modulation convex part, 46 - mounting flange, 451 - operation groove;

[0041] 200 - clamping seat, 50 - connecting part, 60 - positioning part, 70 - clamping part. Detailed implementation mode

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs; the terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. For example, the terms such as "length", "width", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position shown in the drawings, which is only for convenience of description and cannot be construed as a limitation to the technical solution of the present application.

[0043] The terms "comprising" and "having" and any variations thereof in the description and claims of the present utility model and the above-mentioned drawings are intended to cover non-exclusive inclusion; the terms "first", "second", etc. in the description and claims of the present utility model or the above-mentioned drawings are used to distinguish different objects and not to describe a specific order. In the description and claims of the present utility model and the above-mentioned drawings, when an element is referred to as "fixed to" or "mounted on" or "disposed on" or "connected to" another element, it can be directly or indirectly located on the other element. For example, when an element is referred to as "connected to" another element, it can be directly or indirectly connected to the other element.

[0044] In addition, the mention of "embodiment" in this text means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of the present utility model. The occurrence of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0045] Embodiment 1:

[0046] Referring to Figures 1 to 3 as shown, the present utility model provides an ultrasonic turning mechanism 100, including:

[0047] A transducer, including a multi-stage amplitude transformer 20 and an ultrasonic component 30. The ultrasonic component 30 is disposed on the multi-stage amplitude transformer 20, and the multi-stage amplitude transformer 20 is used to adjust the ultrasonic amplitude;

[0048] A composite tool bit 40 is disposed at the end of the multi-stage amplitude transformer 20; under the action of the transducer, the composite tool bit 40 realizes multi-station ultrasonic turning processing.

[0049] In this embodiment, the ultrasonic component 30 generates ultrasonic energy, which is transmitted to the composite tool bit 40 through the multi-stage amplitude transformer 20 to realize ultrasonic turning processing of the material. By setting the multi-stage amplitude transformer 20, the ultrasonic amplitude transmitted to the composite tool bit 40 can be increased, and by using the composite tool bit 40, multi-station ultrasonic turning processing of the material can be realized, improving the working efficiency of the mechanism.

[0050] Further, the multi-stage amplitude transformer 20 includes a plurality of amplitude transformer units arranged in sequence along the axial direction, Figure 12 as shown in, each amplitude transformer unit has a large diameter end D and a small diameter end d, and the length of each amplitude transformer unit is L, then d / D < 1 and D < 4 / 5L are satisfied. The large diameter end of each amplitude transformer unit satisfies the parameter range D < 4 / 5L, which can facilitate the processing of the multi-stage amplitude transformer 20. After multiple experimental tests, this parameter range can realize an increase in the ultrasonic amplitude when it is transmitted along the axial direction of the multi-stage amplitude transformer 20, that is, the ultrasonic amplitude transmitted to the composite tool bit 40 can be adjusted.

[0051] Specifically, the plurality of amplitude transformer units include a first amplitude transformer 21 and a second amplitude transformer 22 arranged in sequence along the axial direction of the multi-stage amplitude transformer 20. The first amplitude transformer 21 has a tapered transition portion 211, and the second amplitude transformer 22 has a tapered step portion 221; the cross-sectional areas of the tapered transition portion 211 and the tapered step portion 221 perpendicular to the axis of the multi-stage amplitude transformer 20 gradually decrease along the transmission direction of the ultrasonic amplitude, that is, the cross-sectional area gradually decreases from the ultrasonic component 30 to the composite tool bit 40 direction.

[0052] It is understandable that the multi-stage horn 20 may not be limited to a two-stage setting, and may be processed with an integral structure, or multiple horn units may be connected in sequence. In order to ensure the overall rigidity of the structure, the multi-stage horn 20 adopts a two-stage setting, namely a first horn 21 and a second horn 22, which is convenient for installation and setting. The cross-sectional area of ​​the second horn 22 perpendicular to the axis of the support shell 10 is smaller than that of the first horn 21, and the cross-sectional area of ​​the conical transition portion 211 and the conical step portion 221 gradually decreases along the transmission direction of the ultrasonic amplitude, which can increase the ultrasonic amplitude transmitted to the composite cutter head 40.

[0053] Furthermore, the composite cutter head 40 includes a cutter rod 41, multiple groups of mounting arms and multiple cutter grains. The cutter rod 41 is arranged at the end of the multi-stage amplitude changing rod 20. Multiple groups of mounting arms are arranged on the periphery of the cutter rod 41. Cutter grains are arranged at the end of each group of mounting arms. The cutting edge of the cutter grains is arranged away from the axis of the cutter rod 41 to facilitate turning processing.

[0054] Specifically, the knife bar 41 and the second amplitude rod 22 can be coaxially arranged, and the two can also be an integrated structure, that is, the end of the second amplitude rod 22 is processed to form the knife bar 41. A plurality of mounting arms are arranged on the knife bar 41 and a plurality of knife grains are correspondingly arranged to form a multi-station composite knife head. When one knife grain is worn out during processing, the knife grains of other stations can be directly used to continue processing, which saves the time of disassembling and replacing new knife grains and improves work efficiency.

[0055] Furthermore, a first mounting arm 421 and a second mounting arm 422 are relatively arranged on the outer periphery of the knife rod 41 and on both sides of the axis, a first knife particle 431 is arranged on the first mounting arm 421, and a second knife particle 432 is arranged on the second mounting arm 422, and the ultrasonic vibration modes of the first knife particle 431 and the second knife particle 432 are consistent.

[0056] Specifically, the first mounting arm 421 and the second mounting arm 422 can adopt a symmetrical structure, and the first blade 431 and the second blade 432 adopt a similar structure, so that the ultrasonic vibration modes of the first blade 431 and the second blade 432 are consistent, and the ultrasonic amplitude distribution of the device is more uniform, ensuring the consistency of the processing accuracy and efficiency of the blades in multiple stations. It can be understood that if the two relative mounting arms are a group, multiple groups of mounting arms and multiple blades can be set along the circumference of the outer periphery of the tool rod 41. The ultrasonic vibration modes of the two blades in each group are consistent, and the blades of the two adjacent groups can be selected differently according to the processing requirements, that is, some blade groups are used for turning finishing, some blade groups are used for rough processing, and some blade groups are used for polishing, etc., to improve the working efficiency and application range of the entire turning mechanism.

[0057] Further, a pressing tool block 44 is arranged on the mounting arms (421, 422). One end of the pressing tool block 44 is arranged on the mounting arm, and the other end of the pressing tool block 44 is in abutting fit with the surface of the corresponding cutting insert, so as to improve the mounting strength and mounting stability of each cutting insert, thereby ensuring the reliability of actual machining of each cutting insert.

[0058] Further, a frequency modulation convex part 45 is also arranged at the end of the tool bar 41 ( Figure 10 as shown). The frequency modulation convex part 45 is located on the side of the mounting arm away from the support housing 10, which can play a role in adjusting the stability of the ultrasonic amplitude, realize the stability of the ultrasonic vibration of the cutting insert, and can also adjust the ultrasonic vibration mode of the tool bar 41.

[0059] Specifically, the axial dimension of the frequency modulation convex part 45 can be adaptively adjusted according to the diameter of the tool bar 41, that is, if the diameter of the tool bar 41 is larger, the axial dimension of the frequency modulation convex part 45 can be reduced; if the diameter of the tool bar 41 is smaller, the axial dimension of the frequency modulation convex part 45 can be increased, so as to realize the function of adjusting the stability of the ultrasonic amplitude through the frequency modulation convex part 45.

[0060] Further, the included angle between the mounting axis of the mounting arm and the axis of the tool bar 41 ranges from 0° to 175°, and specifically can be 5°, 30°, 45°, 60°, 75°, 120°, 135°, 150°, 175° or any value within the range, which can change the ultrasonic vibration mode of the composite tool head 40 to meet different processing requirements.

[0061] In the first embodiment, the axes of both the mounting arms (421, 422) and the cutting inserts (431, 432) are perpendicular to the axis of the tool bar 41, which is convenient for installation and cooperation and ensures the reliability of machining of the composite tool head 40.

[0062] Further, the mechanism further includes a support housing 10, and the support housing 10 has a receiving cavity; the ultrasonic component 30 is placed in the receiving cavity of the support housing 10, and a part of the multi-stage amplitude transformer 20 is arranged in the receiving cavity of the support housing 10;

[0063] At least one support flange is arranged on the outer periphery of the multi-stage amplitude transformer 20, each support flange is respectively connected with the support housing 10, and each support flange is set as a vibration zero point.

[0064] Specifically, the multi-stage horn 20 and the support housing 10 are connected and cooperated through one or more support flanges, which can improve the connection stability and connection rigidity of the multi-stage horn 20. Each support flange is set as a vibration zero point to prevent the ultrasonic amplitude generated by the ultrasonic component 30 from leaking when transmitted to the multi-stage horn 20 and transmitting the vibration to the external machine tool, thereby affecting the reliability of the cooperation between the ultrasonic turning mechanism 100 and the external machine tool.

[0065] Further, Figure 2 As shown in, a first support flange 231 is arranged on the outer periphery of the first horn 21, and the first support flange 231 is connected and cooperated with the inner wall of the support housing 10; a second support flange 232 is arranged on the outer periphery of the second horn 22, and the second support flange 232 is connected and cooperated with the end of the support housing 10.

[0066] Specifically, referring to Figure 4 and Figure 5 As shown in, a plurality of annular grooves 2321 are arranged on the second support flange 232 in the circumferential direction, a plurality of positioning holes 101 are arranged on the support housing 10, and the positions of the annular grooves 2321 and the positioning holes 101 correspond to each other, which is convenient for the installation and cooperation of the multi-stage horn 20 and the support housing 10 and can adjust the installation angle of the multi-stage horn 20 and the support housing 10. It can be understood that the number of the positioning holes 101 can be greater than the number of the annular grooves 2321, so that when the multi-stage horn 20 rotates at any angle, the annular grooves 2321 can correspond to the positioning holes 101, and the multi-stage horn 20 and the support housing 10 can be reliably installed through the connecting piece.

[0067] Embodiment Two:

[0068] Referring to Figure 6 As shown in, the difference between this Embodiment Two and Embodiment One lies in the different structure of the composite tool head 40. Third mounting arms 423 and fourth mounting arms 424 are oppositely arranged on the outer periphery of the tool bar 41, and the third mounting arms 423 and the fourth mounting arms 424 are inclined in the direction of approaching or departing from the multi-stage horn 20. A third cutting insert 433 is arranged on the third mounting arm 423, and a fourth cutting insert 434 is arranged on the fourth mounting arm 424.

[0069] Further, the mounting arms (423, 424) are inclined on the tool bar 41 in the direction of departing from the multi-stage horn 20, which is convenient for installing the corresponding cutting inserts and also avoids interference during actual machining; the included angle between the mounting axis of the mounting arm and the axis of the tool bar 41 is β, and the value range of β is 0°

[0070] ~90°, and specifically can take values of 5°, 30°, 45°, 60°, 75°, 85° or any value within the range, which can meet different machining requirements.

[0071] Furthermore, the included angle between the installation axis of the cutting inserts (433, 434) and the axis of the tool bar 41 is α, and the value range of α is 0° to 180°. Specifically, the values can be 0°, 30°, 45°, 60°, 75°, 120°, 135°, 150°, 180° or any value within the range, which can meet different processing requirements and improve the processing accuracy.

[0072] In the second embodiment, the installation angles of the installation arm and the cutting inserts can be selected separately according to actual needs, that is, the installation arm is inclined on the tool bar 41, and its installation angle can meet the requirements of different installation conditions and different processing conditions. And the installation angle of the cutting inserts can improve the processing accuracy under the condition of ensuring the installation accuracy and processing efficiency.

[0073] Figure 4 In the direction shown in, the first cutting insert 431 and the second cutting insert 432 are respectively located on the front side surfaces of the corresponding installation arms (421, 422), which is convenient for installation and makes the ultrasonic vibration modes of the first cutting insert 431 and the second cutting insert 432 consistent. In other embodiments, the cutting inserts on the tool bar 41 relative to the installation arm can be located on different side surfaces, that is, the first cutting insert 431 or the second cutting insert 432 is located on the front side surface of the corresponding installation arm, while the second cutting insert 432 or the first cutting insert 431 is located on the rear side surface, left side surface or right side surface of the corresponding installation arm, as long as the ultrasonic vibration modes of the first cutting insert 431 or the second cutting insert 432 are consistent, and both can ensure the processing accuracy and processing efficiency.

[0074] Refer to Figures 7 to 9 As shown, the present invention also provides an ultrasonic turning device, including the ultrasonic turning mechanism 100 and the clamping seat 200 described above. The clamping seat 200 includes a clamping portion 70, a connecting portion 50 provided on the outer periphery of the clamping portion 70, and a positioning portion 60;

[0075] The clamping portion 70 is provided on the outer periphery of the support housing 10 of the ultrasonic turning mechanism 100 and elastically clamps and cooperates with the support housing 10;

[0076] The connecting portion 50 cooperates with an external machine tool, and the ultrasonic turning device can be directly installed on a traditional machine tool, improving the versatility;

[0077] The positioning portion 60 is used to reliably connect the clamping portion 70 and the support housing 10.

[0078] Specifically, the ultrasonic turning mechanism 100 is connected and cooperated with an external machine tool through the holding seat 200, which can improve the versatility of the device. The holding seat 200 elastically clamps and cooperates with the support housing 10 through the clamping portion 70, and is reliably connected through the positioning portion 60, which facilitates the installation and positioning of the ultrasonic turning mechanism 100, and also facilitates the adjustment of the installation angle of the ultrasonic turning mechanism 100, that is, the installation angle of the composite cutting tool head 40, to ensure the reliability of turning processing.

[0079] It can be understood that the clamping portion 70 and the support housing 10 can be an integral structure, that is, the clamping portion 70 is detachably connected to the support flange on the multi-stage amplitude transformer 20, and the holding seat 200 can also reliably connect and cooperate the ultrasonic turning mechanism 100 with an external machine tool.

[0080] Furthermore, the positioning portion 60 has an elastic groove 61. By adjusting the size of the elastic groove 61, the clamping portion 70 can be adapted to support housings 10 of different sizes for installation, and it is also convenient to adjust the installation angle between the multi-stage amplitude transformer 20 and the holding seat 200, that is, to adjust the installation angle of the composite cutting tool head 40 on the machine tool.

[0081] Specifically, the clamping portion 70 is an annular elastic structure and is disposed on the outer periphery of the support housing 10. The outer periphery of the clamping portion 70 extends radially to form the positioning portion 60 and forms an elastic groove 61 communicating with the inner cavity of the clamping portion 70.

[0082] Furthermore, an installation flange 46 ( Figure 10 as shown) is disposed on the outer periphery of the frequency modulation convex portion 45. The installation flange 46 can be installed and cooperated with an external machine tool through a bracket, which further ensures the stability of the installation cooperation between the ultrasonic turning device and the machine tool, and can also improve the turning rigidity of the composite cutting tool head 40.

[0083] Specifically, operation grooves 451 ( Figure 11 as shown) are also oppositely provided on the frequency modulation convex portion 45. Since installation holes 24 are provided on the first support flange 231 and are bolted to the ultrasonic assembly 30, and the first amplitude transformer 21 and the second amplitude transformer 22 can also be bolted together, it is convenient to reliably connect the multi-stage amplitude transformer 20 and the ultrasonic assembly 30, and the first amplitude transformer 21 and the second amplitude transformer 22 by applying a tool to the operation grooves 451.

[0084] The ultrasonic turning mechanism and device provided by the present invention can realize multi-station ultrasonic turning processing of materials, improve the working efficiency and processing accuracy of turning processing, and can meet the installation cooperation of ultrasonic turning mechanisms of different sizes with machine tools. It has strong versatility, stable ultrasonic vibration output, diverse ultrasonic cutting modes, and high rigidity of the whole device, and can also meet different processing requirements.

[0085] 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 other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and are all included in the protection scope of the present utility model.

Claims

1. An ultrasonic turning mechanism, characterized in that: include: The transducer comprises a multi-stage horn and an ultrasonic component, wherein the ultrasonic component is arranged on the multi-stage horn, and the multi-stage horn is used to adjust the ultrasonic amplitude; The composite cutter head is arranged at the end of the multi-stage amplitude changing rod; under the action of the transducer, the composite cutter head realizes multi-station ultrasonic turning processing.

2. The ultrasonic turning mechanism according to claim 1, characterized in that: The multi-stage horn includes a plurality of horn units sequentially arranged along the axial direction, each horn unit has a large diameter end D and a small diameter end d, and the length of each horn unit is L, satisfying d / D<1 and D<4 / 5L; And / or, the horn unit has a tapered transition portion or a tapered step portion, and a cross-sectional area of ​​the tapered transition portion or the tapered step portion perpendicular to the axis gradually decreases along the transmission direction of the ultrasonic amplitude.

3. The ultrasonic turning mechanism according to claim 1, characterized in that: The composite cutter head includes a cutter rod, multiple groups of mounting arms and multiple cutter grains. The cutter rod is arranged at the end of a multi-stage amplitude changing rod, and multiple groups of mounting arms are arranged on the periphery of the cutter rod; a cutter grain is arranged at the end of each group of mounting arms, and the blade portion of the cutter grain is arranged away from the axis of the cutter rod.

4. The ultrasonic turning mechanism according to claim 3, characterized in that: Each group of mounting arms comprises a first mounting arm and a second mounting arm which are arranged on both sides of the knife rod axis and are opposite to each other, and the ultrasonic vibration modes of the knife particles on the first mounting arm and the second mounting arm are consistent.

5. The ultrasonic turning mechanism according to claim 3, characterized in that: A knife pressing block is arranged on the mounting arm, one end of the knife pressing block is arranged on the mounting arm, and the other end of the knife pressing block is abutted and matched with the surface of the corresponding knife particle.

6. The ultrasonic turning mechanism according to claim 3, characterized in that: The included angle between the installation axis of the installation arm and the axis of the knife rod is 0° to 175°.

7. The ultrasonic turning mechanism according to claim 3, characterized in that: The included angle between the installation axis of the knife particle and the axis of the knife rod is α, 0°≤α≤180°.

8. The ultrasonic turning mechanism according to claim 3, characterized in that: A frequency modulation protrusion is also provided at the end of the knife rod, and the frequency modulation protrusion is located at a side of the mounting arm away from the ultrasonic component.

9. The ultrasonic turning mechanism according to claim 1, characterized in that: It also includes a supporting shell, the supporting shell has a containing cavity; the ultrasonic component is placed in the containing cavity of the supporting shell, and the multi-stage horn part is arranged in the containing cavity of the supporting shell; At least one supporting flange is arranged on the periphery of the multi-stage amplitude transformer, each of the supporting flanges is connected to the supporting shell, and each of the supporting flanges is set as a vibration zero point.

10. The ultrasonic turning mechanism according to claim 9, characterized in that: One of the support flanges is connected and matched with the end of the support shell, and the support flange is provided with a plurality of annular grooves along the circumferential direction; the support shell is provided with a plurality of positioning holes, and the positions of the annular grooves and the positioning holes correspond to each other.

11. An ultrasonic turning device, characterized in that: The ultrasonic turning mechanism and the holder according to any one of claims 1 to 10 are included, wherein the holder comprises a clamping portion, a connecting portion and a positioning portion arranged on the periphery of the clamping portion; The clamping part is arranged on the outer periphery of the supporting shell of the ultrasonic turning mechanism to elastically clamp the supporting shell; the connecting part is connected with the machine tool, and the positioning part connects the clamping part with the supporting shell.

12. The ultrasonic turning device according to claim 11, characterized in that: The outer periphery of the frequency modulation convex part on the tool rod of the composite tool head is provided with a mounting flange which is connected and matched with the machine tool.

Images