CN113714862A - Large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition and operation process thereof - Google Patents
Large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition and operation process thereof Download PDFInfo
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- CN113714862A CN113714862A CN202110940897.6A CN202110940897A CN113714862A CN 113714862 A CN113714862 A CN 113714862A CN 202110940897 A CN202110940897 A CN 202110940897A CN 113714862 A CN113714862 A CN 113714862A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
Abstract
The invention relates to a large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition and an operation process thereof, wherein the device mainly comprises a multistage vibration combined component and a supporting shell component, and the multistage vibration combined component is fixed on the supporting shell component; the support housing component comprises a support base and an upper cover housing; the multistage vibration combined component mainly comprises a 1-stage vibration unit and a 2-stage vibration unit, wherein the 1-stage vibration unit and the 2-stage vibration unit have the same resonant frequency, and both the 1-stage vibration unit and the 2-stage vibration unit consist of a piezoelectric ceramic transducer and a vibration body; the structural size of the vibrating body of the 1-level vibrating unit meets the design requirement of full-wavelength resonance, and the structural size of the vibrating body of the 2-level vibrating unit meets the design requirement of half-wavelength resonance; the vibration superposition of the 1-level vibration unit and the 2-level vibration unit realizes the increase of the amplitude, thereby achieving the purpose of interrupted cutting in the grinding process, simultaneously increasing the track overlapping rate and improving the surface quality.
Description
Technical Field
The invention belongs to the technical field of grinding and special machining, and particularly relates to a large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition.
Technical Field
The ultrasonic vibration assisted grinding is a composite processing technology for removing materials by applying one-dimensional or multidimensional ultrasonic vibration to a grinding wheel or a workpiece on the basis of the traditional grinding, and is one of effective methods for solving the processing problem of difficult-to-process materials. In the ultrasonic vibration auxiliary grinding process, intermittent cutting exists between abrasive particles and workpiece materials due to ultrasonic vibration, so that friction force is reduced, and further grinding force is reduced. Meanwhile, the cutting fluid enters a grinding arc area by intermittent cutting, so that the grinding temperature can be reduced, and the thermal damage of the grinding surface is inhibited. In addition, the high acceleration impact action of the ultrasonic vibration enhances the self-sharpening action of the abrasive particles, and in addition, the overlapping cutting of the abrasive particle tracks improves the surface processing quality and the service life of the grinding wheel.
The ultrasonic grinding control process parameters mainly comprise ultrasonic frequency and amplitude. Because the ultrasonic frequency is a fixed value, the advantage of ultrasonic vibration is exerted, and a larger ultrasonic amplitude adjustment range is required. At present, the ultrasonic vibration auxiliary grinding device has a limited adjustable range of ultrasonic amplitude, is not beneficial to improving the critical vibration cutting speed, and cannot use a larger feeding speed in the grinding process, so that the effect of improving the material removal rate is achieved; moreover, the small amplitude is not beneficial to improving the overlapping rate between the cutting tracks of the abrasive particles, and the quality of the processed surface cannot be effectively improved.
An issued patent with patent number 2020102941575 obtained by the inventor discloses an ultrasonic vibration platform with large amplitude, wherein a piezoelectric ceramic transducer of the platform generates longitudinal ultrasonic vibration under the action of external excitation voltage, the longitudinal ultrasonic vibration is amplified through a longitudinal vibration amplitude transformer, the amplified ultrasonic vibration is transmitted to a bending vibration amplitude transformer, so that the tail ends of the two sides of the bending vibration amplitude transformer generate bending vibration, the 2-level longitudinal vibration amplitude transformer converts the bending vibration into the longitudinal vibration and amplifies the amplitude, and finally the longitudinal vibration is transmitted to the rear end of a workbench, so that the rear end of the workbench has large amplitude. The ultrasonic vibration system has a simple structure, is convenient to control, can be used in occasions requiring large amplitude in ultrasonic vibration auxiliary processing, and overcomes the defects that in the prior art, in some occasions requiring large amplitude of ultrasonic vibration, a high-power ultrasonic vibration system is required, the space volume of the ultrasonic vibration system is increased, and the application is inconvenient.
The patent application with the application number of CN202110395336.2 filed by the applicant at 2021.04.13 discloses a one-way ultrasonic auxiliary forming grinding device and an operation method, belonging to the field of ultrasonic auxiliary machining in composite machining. The two clamping and fixing components of the device clamp two ends of a workpiece, an ultrasonic transducer is connected with one clamping and fixing component through a stud, the clamping and fixing component connected with the ultrasonic transducer transmits ultrasonic vibration, two ends of an extension rod of the clamping and fixing component are respectively connected with the ultrasonic transducer and a double-wing-shaped clamp, and the extension rod is clamped between an upper clamping plate and a lower clamping plate and is fixed on a machining platform of a machine tool. The clamping point is located at the vibration node. Under the working state, the double-wing gradual change structure of the double-wing clamp greatly inhibits the ultrasonic vibration of the workpiece in the non-processing direction, so that the workpiece generates unidirectional vibration; the machining requirements of workpieces with different lengths can be met; the four-side processing of the workpiece can be realized without disassembling the whole ultrasonic auxiliary forming and grinding equipment.
Disclosure of Invention
The invention provides a large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition, which aims to solve the defects in the prior art, increases the ultrasonic amplitude by utilizing superposition of a plurality of vibration units, can be applied to high-speed grinding occasions, and is an authorized patent for an ultrasonic vibration platform with the application number of 2020102941575 and the name of large amplitude; the application number is CN202110395336.2, and the technical improvement of a one-way ultrasonic auxiliary forming grinding device and an operation method is provided.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
a large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition mainly comprises a multistage vibration combined component and a supporting shell component; the supporting shell component comprises an upper cover shell and a supporting base; the multistage vibration combined component mainly comprises a 1-stage vibration unit and a 2-stage vibration unit.
The 1-level vibration unit and the 2-level vibration unit are both composed of a piezoelectric ceramic transducer and a vibration body, the piezoelectric ceramic transducer and the vibration body are both connected through a stud, and the excitation frequency of the piezoelectric ceramic is the same as the resonance frequency of the vibration body.
The multistage vibration combination component is fixed at two ends of the supporting shell component through two flanges of a vibration body of the 1-stage vibration unit, and the middle parts of the two flanges are positioned in the supporting shell component; the flange of the 2-level vibration unit vibrating body is fixed at the rear end of the 1-level vibration unit vibrating body through bolts, and the front end of the flange is located inside the 1-level vibration unit vibrating body.
The whole of 1 level vibration unit pendulum is the stairstepping, and the front end is solid cylinder, and the rear end is the ring structure that has the cavity, and whole length size satisfies full wavelength resonance design requirement, and two vibration antinodes are located the front and back both ends face of pendulum respectively, and two vibration node points of pendulum are equipped with the flange, flange circumference equipartition screw hole.
The 2-stage vibration unit vibrating body is composed of a front end, a flange and a rear end workbench, the cross sections of the front end and the flange are circular, the cross section of the rear end workbench is rectangular, the whole length meets the design requirement of half-wavelength resonance, the flange is located at a vibration wave node, and threaded holes are uniformly distributed in the circumference of the flange.
The 2N-stage (N >2) vibration units can be connected behind the 2-stage vibration unit, and all the vibration units are excited by an ultrasonic generator.
An operation process of a large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition comprises the following steps:
(1) the required working frequency f of the ultrasonic vibration auxiliary grinding device is determined.
(2) The multistage vibration combined component consists of 2N (N is more than or equal to 1) vibration units, and the resonant frequency of each vibration unit is f.
(3) The 1, 3 … 2N-1 (odd) stage vibration units all meet the full-wavelength resonance design requirement with the frequency f, and the 2, 4 … 2N (even) stage vibration units all meet the half-wavelength resonance design requirement with the frequency f.
(4) Mounting node flanges of even-level vibration unit vibration bodies at antinode points of odd-level vibration unit vibration bodies, wherein the amplitude of each vibration unit is Ai(i =1,2 … 2N), by means of the same phase multilevel vibration amplitude aiTo achieve a vibration amplitude of a = a1+A2…+ A2NThe ultrasonic vibration of (2).
Has the advantages that: the multistage vibration combined component mainly comprises a 1-stage vibration unit and a 2-stage vibration unit, wherein the 1-stage vibration unit and the 2-stage vibration unit have the same resonant frequency, and both the 1-stage vibration unit and the 2-stage vibration unit consist of a piezoelectric ceramic transducer and a vibration body; the structural size of the vibrating body of the 1-level vibrating unit meets the design requirement of full-wavelength resonance, and the structural size of the vibrating body of the 2-level vibrating unit meets the design requirement of half-wavelength resonance; the vibration superposition of the 1-level vibration unit and the 2-level vibration unit realizes the increase of the amplitude, thereby achieving the purpose of interrupted cutting in the grinding process, simultaneously increasing the track overlapping rate and improving the surface quality.
Drawings
FIG. 1 is a schematic overall structure diagram of a large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition according to the invention;
FIG. 2 is a cross-sectional view of the large amplitude ultrasonic vibration assisted grinding apparatus of FIG. 1 based on superposition of vibrations;
fig. 3 is a schematic structural view of the 1-stage vibration unit 3 of fig. 2;
fig. 4 is a schematic structural view of the 2-stage vibration unit 6 of fig. 2;
FIG. 5 is a sectional view of the vibrator 8 of the class 1 vibrating unit of FIG. 3;
fig. 6 is a sectional view of the vibrator 9 of the 2-stage vibration unit in fig. 4.
Fig. 7 is a graph showing the effect of the amplitude superposition of the 2-step vibration combinations in example 1.
Description of the main reference numerals: the vibration-type multi-stage vibration combined component comprises a multi-stage vibration combined component-1, a supporting shell component-2, a 1-stage vibration unit-3, an upper cover shell-4, a supporting base-5, a 2-stage vibration unit-6, piezoelectric ceramic transducers-7 and 7-1, a 1-stage vibration unit vibration body-8 and a 2-stage vibration unit vibration body-9.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.
Example 1
Fig. 1 is a large amplitude ultrasonic vibration-assisted grinding apparatus when N =1, i.e., two vibration units are combined, the apparatus being mainly composed of a multistage vibration combination member 1 and a supporting housing member 2; fig. 2 is a sectional view of the large-amplitude ultrasonic vibration-assisted grinding apparatus, the multistage vibration combining member 1 mainly includes a stage 1 vibration unit 3 and a stage 2 vibration unit 6, and the supporting housing member 1 includes an upper cover housing 4 and a supporting base 5.
Fig. 3 is a schematic structural view of the 1-stage vibration unit 3 of fig. 2; fig. 4 is a schematic structural view of the 2-stage vibration unit 6 in fig. 2, and referring to fig. 3 and 4, the 1-stage vibration unit 3 is composed of a piezoelectric ceramic transducer 7 and a 1-stage vibration unit vibration body 8, and the 2-stage vibration unit 6 is composed of a piezoelectric ceramic transducer 7-1 and a 2-stage vibration unit vibration body 9; are all connected through a double-end stud. And the excitation frequency of the piezoelectric ceramic transducer 7 is the same as the resonance frequency of the vibration body 8 of the vibration unit of the 1 st order, and similarly, the excitation frequency of the piezoelectric ceramic transducer 7-1 is the same as the resonance frequency of the vibration body 9 of the vibration unit of the 2 nd order.
Fig. 5 is a sectional view of the stage 1 vibrating unit vibrating body 8 in fig. 3, and fig. 6 is a sectional view of the stage 2 vibrating unit vibrating body 9 in fig. 4. The multistage vibration combined component 1 is fixed at two ends of the supporting shell component 2 through two flanges 11 and 12 of a 1-stage vibration unit vibrating body 8, and the middle parts of the two flanges 11 and 12 are positioned inside the supporting shell component 2; the flange 15 of the 2-stage vibration unit vibrating body 9 is fixed to the rear end 13 of the 1-stage vibration unit vibrating body 8 by bolts, and the front end 15 of the flange 14 is located inside the 1-stage vibration unit vibrating body 8.
The vibrating body 8 of the 1-level vibrating unit is integrally stepped, the front end of the vibrating body is a solid cylinder, the rear end of the vibrating body is of a circular ring structure with a cavity, and the overall length dimension meets the design requirement of full-wavelength resonance. The front and rear ends of the vibration body 8 of the class 1 vibration unit have a small front and a large rear diameter because the front end 15 of the vibration body 9 of the class 2 vibration unit is accommodated in the cavity at the rear end. Two vibration antinodes are respectively positioned at the front end 10 and the rear end 13 of the 1-level vibration unit vibration body 8, a flange 11 and a flange 12 are arranged at two vibration wave nodes of the 1-level vibration unit vibration body 8, and threaded holes are uniformly distributed on the circumferences of the flanges 11 and 12 and used for being fixed with the upper cover shell.
The 2-stage vibration unit vibrating body 9 is composed of a front end 14, a flange 15 and a rear end workbench 16, the sections of the front end 14 and the flange 15 are circular, the section of the rear end workbench 16 is rectangular, the overall length meets the design requirement of half-wavelength resonance, the flange 15 is located at a vibration wave node, and threaded holes are uniformly distributed in the circumference of the flange 15.
The 1-stage vibration unit and the 2-stage vibration unit are excited by an ultrasonic generator.
An operation process of a large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition comprises the following steps:
(1) the required working frequency f =20kHz of the ultrasonic vibration assisted grinding device was determined.
(2) The multistage vibration combined component is composed of 2 vibration units, and the resonance frequency of each vibration unit is f =20 kHz.
(3) The 1 (odd) order vibration units all meet the full-wavelength resonance design requirement with the frequency of f =20kHz, and the 2 (even) order vibration units all meet the half-wavelength resonance design requirement with the frequency of f =20 kHz.
(4) Mounting a node flange of a 2-stage vibration unit vibration body at an antinode of a 1-stage vibration unit vibration body, wherein the amplitude amplitudes of the 1-stage vibration unit and the 2-stage vibration unit are respectively A1And A2By the same phase multistage vibration amplitude A1And A2To achieve a vibration amplitude of a = a1+A2The effect of amplitude superposition is shown in fig. 7.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (5)
1. A large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition is characterized by mainly comprising a multistage vibration combined component and a supporting shell component; the supporting shell component comprises an upper cover shell and a supporting base; the multistage vibration combined component mainly comprises a 1-stage vibration unit and a 2-stage vibration unit;
the 1-level vibration unit and the 2-level vibration unit are both composed of a piezoelectric ceramic transducer and a vibration body, the piezoelectric ceramic transducer and the vibration body are both connected through a stud, and the excitation frequency of the piezoelectric ceramic is the same as the resonance frequency of the vibration body;
the multistage vibration combination component is fixed at two ends of the supporting shell component through two flanges of the 1-stage vibration unit vibration body, and the flange of the 2-stage vibration unit vibration body is fixed at the rear end of the 1-stage vibration unit vibration body through bolts.
2. The large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition as claimed in claim 1, wherein the whole body of the vibrating body of the 1-level vibration unit is step-shaped, the front end of the vibrating body is a solid cylinder, the rear end of the vibrating body is a circular ring structure with a cavity, the whole length dimension meets the design requirement of full-wavelength resonance, two vibration antinodes are respectively arranged on the front end surface and the rear end surface of the vibrating body, flanges are arranged at two vibration nodes of the vibrating body, and threaded holes are uniformly distributed on the periphery of the flanges.
3. The large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition is characterized in that a 2-stage vibration unit vibration body is composed of a front end, a flange and a rear end workbench, the cross sections of the front end and the flange are circular, the cross section of the rear end workbench is rectangular, the overall length meets the design requirement of half-wavelength resonance, the flange is located at a vibration wave node, and threaded holes are uniformly distributed in the circumference of the flange.
4. A large amplitude ultrasonic vibration assisted grinding device based on vibration superposition according to claim 1, characterized in that 2N vibration units, N >2, can be connected behind the 2-stage vibration unit, all the vibration units being excited by an ultrasonic generator.
5. The process for operating a large amplitude ultrasonic vibration-assisted grinding device based on superposition of vibrations as set forth in claim 1, characterized by comprising the steps of:
(1) determining the working frequency f required by the ultrasonic vibration auxiliary grinding device;
(2) the multistage vibration combined component consists of 2N (N is more than or equal to 1) vibration units, and the resonant frequency of each vibration unit is f;
(3) the 1, 3 … 2N-1 odd-level vibration units meet the full-wavelength resonance design requirement with the frequency f, and the 2, 4 … 2N (even-numbered) level vibration units meet the half-wavelength resonance design requirement with the frequency f;
(4) mounting node flanges of even-level vibration unit vibration bodies at antinode points of odd-level vibration unit vibration bodies, wherein the amplitude of each vibration unit is Ai(i =1,2 … 2N), by means of the same phase multilevel vibration amplitude aiTo achieve a vibration amplitude of a = a1+A2…+ A2NThe ultrasonic vibration of (2).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110940897.6A CN113714862B (en) | 2021-08-17 | 2021-08-17 | Large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition and operation process thereof |
| NL2031749A NL2031749A (en) | 2021-08-17 | 2022-05-01 | Large-amplitude ultrasonic vibration-assisted grinding device based on vibration superposition and operation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110940897.6A CN113714862B (en) | 2021-08-17 | 2021-08-17 | Large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition and operation process thereof |
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| CN113714862A true CN113714862A (en) | 2021-11-30 |
| CN113714862B CN113714862B (en) | 2022-08-05 |
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| CN202110940897.6A Active CN113714862B (en) | 2021-08-17 | 2021-08-17 | Large-amplitude ultrasonic vibration auxiliary grinding device based on vibration superposition and operation process thereof |
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| CN (1) | CN113714862B (en) |
| NL (1) | NL2031749A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1071616A (en) * | 1963-08-02 | 1967-06-07 | Alcatel Sa | Improvements in composite vibrators |
| CN101362303A (en) * | 2008-09-10 | 2009-02-11 | 苏州协成模具科技有限公司 | Grinding method combining mechanical reciprocation and supersonic vibration |
| CN101869886A (en) * | 2010-06-12 | 2010-10-27 | 广西广播电视大学 | Composite multi-frequency ultrasonic transducer with thread radiation at two ends |
| CN101879685A (en) * | 2010-07-05 | 2010-11-10 | 北京航空航天大学 | Composite ultrasonic elliptical vibratory cutting device suitable for making shark skin imitation structural skin |
| CN104526751A (en) * | 2014-12-26 | 2015-04-22 | 广州市昊志机电股份有限公司 | Novel ultrasonic tool shank component |
| CN106827269A (en) * | 2017-01-25 | 2017-06-13 | 陕西师范大学 | Ultrasonic wave gemstone working apparatus with many tool heads |
| CN109968443A (en) * | 2019-04-11 | 2019-07-05 | 苏州科技大学 | A kind of large amplitude indulges curved ultrasonic vibration cutter device |
| CN111604249A (en) * | 2020-04-15 | 2020-09-01 | 南京航空航天大学 | Large-amplitude ultrasonic vibration platform and operation process thereof |
-
2021
- 2021-08-17 CN CN202110940897.6A patent/CN113714862B/en active Active
-
2022
- 2022-05-01 NL NL2031749A patent/NL2031749A/en unknown
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1071616A (en) * | 1963-08-02 | 1967-06-07 | Alcatel Sa | Improvements in composite vibrators |
| CN101362303A (en) * | 2008-09-10 | 2009-02-11 | 苏州协成模具科技有限公司 | Grinding method combining mechanical reciprocation and supersonic vibration |
| CN101869886A (en) * | 2010-06-12 | 2010-10-27 | 广西广播电视大学 | Composite multi-frequency ultrasonic transducer with thread radiation at two ends |
| CN101879685A (en) * | 2010-07-05 | 2010-11-10 | 北京航空航天大学 | Composite ultrasonic elliptical vibratory cutting device suitable for making shark skin imitation structural skin |
| CN104526751A (en) * | 2014-12-26 | 2015-04-22 | 广州市昊志机电股份有限公司 | Novel ultrasonic tool shank component |
| CN106827269A (en) * | 2017-01-25 | 2017-06-13 | 陕西师范大学 | Ultrasonic wave gemstone working apparatus with many tool heads |
| CN109968443A (en) * | 2019-04-11 | 2019-07-05 | 苏州科技大学 | A kind of large amplitude indulges curved ultrasonic vibration cutter device |
| CN111604249A (en) * | 2020-04-15 | 2020-09-01 | 南京航空航天大学 | Large-amplitude ultrasonic vibration platform and operation process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113714862B (en) | 2022-08-05 |
| NL2031749A (en) | 2023-02-24 |
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