CN202285002U - Sheet ultrasonic bending vibration fatigue accelerating test device - Google Patents
Sheet ultrasonic bending vibration fatigue accelerating test device Download PDFInfo
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- CN202285002U CN202285002U CN2011204121204U CN201120412120U CN202285002U CN 202285002 U CN202285002 U CN 202285002U CN 2011204121204 U CN2011204121204 U CN 2011204121204U CN 201120412120 U CN201120412120 U CN 201120412120U CN 202285002 U CN202285002 U CN 202285002U
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- thin slice
- horn
- pull bar
- screw rod
- ultrasonic
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Abstract
The utility model discloses a sheet ultrasonic bending vibration fatigue accelerating test device which comprises a computer system (1), an ultrasonic generator (2) and a piezoelectric ceramic transducer (3) which are sequentially connected, wherein the lower end of the piezoelectric ceramic transducer (3) is fixedly connected with a variable amplitude bar (4); an output end of the variable amplitude bar (4) is connected with a cylindrical clamping lever (5); the upper end surface of the clamping lever (5) is provided with a screw rod (7); and the output end of the variable amplitude bar (4) is provided with a screw hole matched with the screw rod (7). After the structure is adopted, flexural fatigue is easily loaded, and higher test accuracy can be obtained at the same time.
Description
Technical field
The utility model relates to fatigue experimental device, specifically is the tired acceleration test apparatus of thin slice ultrasonic flexural vibration.
Background technology
Carry out torture test for the metal plate sample, the JIS Z of JIS 2275 " metal plate plain bending fatigue test method " adopts moment of flexure to make an experiment.Because the thickness of test film is very little, for example 1mm is perhaps littler, and required moment of flexure must be quite little.In addition, in JIS Z 2275 " metal plate plain bending fatigue test method ", use physical construction to make the two ends of test film receive flecition moment of flexure is provided, thereby the frequency of test is very low, such as about 50Hz, if carry out superelevation cycle (10
7More than) torture test need consuming time more than 20 days.In recent years, Mason is based on the piezoelectricity magnetostriction principle and utilize ultrasonic (or piezoelectric vibration) fatigue method of high-energy ultrasound harmonic technology foundation to begin to be applied to fatigue break research, and its frequency of operation is generally at 15 ~ 22 kHz.Because save test period and expense, the ultrasonic fatigue vibrotechnique has obtained excellent popularization and application, is widely used in the extra long life fatigue study of material.2 kinds of load modes of many employings in the superelevation week fatigue study at present: drawingand pressing fatigue (comprising symmetrical tension and compression and asymmetric tension and compression) and rotoflector are tired.For small size sample, utilize all fatigue loading mode of existing superelevation to be difficult to realize that ultrasonic vibration loads.
The utility model content
The utility model technical matters to be solved is to provide to be easy to realize bending fatigue loading, the tired acceleration test apparatus of the thin slice ultrasonic flexural vibration that test accuracy is higher.
The utility model is that the technical solution problem mainly realizes through following technical scheme: the tired acceleration test apparatus of thin slice ultrasonic flexural vibration; Comprise the computer system, ultrasonic generator, the piezoelectric ceramic transducer that connect successively; The lower end of piezoelectric ceramic transducer is fixedly connected with horn; The output terminal of said horn is connected with columniform pincers pull bar, and the upper surface of said pincers pull bar is provided with screw rod, and the output terminal of horn is provided with the screw that matches with screw rod.The computer system control ultrasonic generator sends ultrasonic signal; Piezoelectric ceramic transducer converts ultrasonic signal to mechanical oscillation signal; Horn is amplified to the required displacement amplitude of thin slice sample to the vibration displacement amplitude from piezoelectric ceramic transducer, in the output terminal output length travel of horn; The stiff end of thin slice sample is designed to circular, the thin slice sample is enclosed within on the screw rod of pincers pull bar and fixing.
The xsect equal and opposite in direction of the xsect of the output terminal of said horn and pincers pull bar.
Said screw rod is positioned on the center line of pincers pull bar.
The screw of said horn is positioned on the center line of horn.
The utility model compared with prior art has the following advantages and beneficial effect:
(1) because the thickness of test film is very little; Required moment of flexure is quite little; With use physical construction to make the two ends of test film receive flecition to provide moment of flexure to compare, form vertical standing wave between horn of the utility model and the pincers pull bar, the thin slice sample vertically and pincers pull bar vertically perpendicular; Test film satisfies laterally and the requirement of pilot system resonant frequency; Realized the purpose of the horizontal ultrasonic flexural vibration of test film, like this, the ultrasonic bending fatigue technology of the utility model can realize more reliably that bending fatigue loads.
(2) the utility model is simple to operate, and design is unique, and just the maximum deflection tension of thin slice sample is transferred to certain cross section the sample from restrained end at the trial, has reduced the influence of about beam quality to test findings, has guaranteed that test has higher precision.
Description of drawings
Fig. 1 is the whole connection layout of the utility model;
Fig. 2 is the structural representation of the pincers pull bar of the utility model;
Fig. 3 is the structural representation of the thin slice sample of linear cross section;
Fig. 4 is the structural representation of the thin slice sample of notch cuttype;
Fig. 5 is the connection block diagram of the utility model.
Pairing Reference numeral is in the accompanying drawing: 1, computer system, 2, ultrasonic generator, 3, piezoelectric ceramic transducer, 4, horn, 5, the pincers pull bar, 6, the thin slice sample, 7, screw rod.
Embodiment
Below in conjunction with embodiment the utility model is done further to specify, but the embodiment of the utility model is not limited thereto.
Embodiment:
Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4; The utility model comprises computer system 1, ultrasonic generator 2, the piezoelectric ceramic transducer 3 that connects successively; The lower end of piezoelectric ceramic transducer 3 is fixedly connected with horn 4; Computer system 1 control ultrasonic generator 2 sends ultrasonic signal; Piezoelectric ceramic transducer 3 converts ultrasonic signal to mechanical oscillation signal, and horn 4 is amplified to the required displacement amplitude of thin slice sample 6, the output length travel in the end of horn 4 to the vibration displacement amplitudes from piezoelectric ceramic transducer 3.
The output terminal of the horn 4 of present embodiment is connected with columniform pincers pull bar 5; The xsect equal and opposite in direction of the xsect of the output terminal of horn 4 and pincers pull bar 5, the upper surface of pincers pull bar 5 is provided with screw rod 7, and screw rod 7 is positioned on the center line of pincers pull bar 5; The output terminal of horn 4 is provided with the screw that matches with screw rod 7; Screw is positioned on the center line of horn 4, guarantees that like this output of horn 4 is consistent with the input of pincers pull bar 5, has guaranteed test accuracy.
The principle of work of the utility model is: at first; Be designed to the stiff end of thin slice sample 6 circular; Thin slice sample 6 is enclosed within on the screw rod 7 of pincers pull bar 5 and fixing; The test fragment of thin slice sample 6 be shaped as linear cross section or notch cuttype cross section, during test the maximum deflection tension of thin slice sample 6 is transferred to from restrained end on the cross section of thin slice sample 6, connect test unit then in order; Thin slice sample 6 is enclosed within on the screw rod 7 of pincers pull bar 5, with pincers pull bar 5 screw and and thin slice sample 6 be fixed on the output terminal of horn 4 together.Then; Under the control of computer system 1; Ultrasonic generator 2 changes the electric signal of 50Hz the ultrasonic sine wave signal output of 20KHz into, converts this ultrasonic sine wave signal to mechanical oscillation signal by piezoelectric ceramic transducer 3 again, and horn 4 is amplified to the required displacement amplitude of thin slice sample 6 to the vibration displacement amplitudes from piezoelectric ceramic transducer 3; And in the output terminal of horn 4 output length travel; Form vertical standing wave between horn 4 and the pincers pull bar 5, thin slice sample 6 is positioned at the anti-node location of standing wave, and the maximum tension stress place of thin slice sample 6 transfers on the cross section from restrained end like this; When supplying with the electric signal change in voltage of piezoelectric ceramic transducer 3; Maximum displacement amplitude in the ultrasonic vibration system is also along with variation; Therefore; Through changing alternate electrical signal voltage, can change the length travel amplitude in the vibration output cross section of horn 4, and then change the end cross displacement input value of thin slice sample 6 and the stress amplitude on the cross section thereof.In test, computer system 1 is through the voltage swing of the ultrasonic sine wave that sends of control ultrasonic generator 2, and then turned is crossed the stress that changes pincers pull bar 5 and realized under the differently curved stress amplitude loading to thin slice sample 6; At the chuck position, the input displacement of pincers pull bar 5 and the input displaced plate of thin slice sample 6 all equal the output displacement of system, thereby can get the bending normal stresses σ of thin slice sample 6 together
STensile stress sigma with pincers pull bar 5
TBetween relation: σ
S=M
Sσ
T/ M
T, wherein, M
TBe the stress displacement coefficient of pincers pull bar 5, M
SBe the stress displacement coefficient of thin slice sample 6, M
TAnd M
SCan obtain through theoretical or finite element method, the tensile stress sigma of pincers pull bar 5 is set through computer system 1
T, can draw the bending normal stresses σ that tests required thin slice sample 6
S, the vibration cycle of the thin slice sample 6 through computer system 1 record is judged the degree of fatigue of thin slice sample 6 again, when the vibration cycle less than 10
5The time, this thin slice sample 6 is low-cycle fatigue; When the vibration cycle is 10
5~ 10
7The time, this thin slice sample 6 is a high cycle fatigue; When vibrating cycle greater than 10
7When inferior, this thin slice sample 6 is that superelevation week is tired.
As stated, then can realize the utility model well.
Claims (4)
1. the tired acceleration test apparatus of thin slice ultrasonic flexural vibration; Comprise the computer system (1), ultrasonic generator (2), the piezoelectric ceramic transducer (3) that connect successively; The lower end of piezoelectric ceramic transducer (3) is fixedly connected with horn (4); It is characterized in that: the output terminal of said horn (4) is connected with columniform pincers pull bar (5); The upper surface of said pincers pull bar (5) is provided with screw rod (7), and the output terminal of horn (4) is provided with the screw that matches with screw rod (7).
2. the tired acceleration test apparatus of thin slice ultrasonic flexural vibration according to claim 1 is characterized in that: the xsect equal and opposite in direction of the xsect of the output terminal of said horn (4) and pincers pull bar (5).
3. the tired acceleration test apparatus of thin slice ultrasonic flexural vibration according to claim 1, it is characterized in that: said screw rod (7) is positioned on the center line of pincers pull bar (5).
4. the tired acceleration test apparatus of thin slice ultrasonic flexural vibration according to claim 1, it is characterized in that: the screw of said horn (4) is positioned on the center line of horn (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204121204U CN202285002U (en) | 2011-10-26 | 2011-10-26 | Sheet ultrasonic bending vibration fatigue accelerating test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204121204U CN202285002U (en) | 2011-10-26 | 2011-10-26 | Sheet ultrasonic bending vibration fatigue accelerating test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202285002U true CN202285002U (en) | 2012-06-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204121204U Expired - Fee Related CN202285002U (en) | 2011-10-26 | 2011-10-26 | Sheet ultrasonic bending vibration fatigue accelerating test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202285002U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776693A (en) * | 2014-01-15 | 2014-05-07 | 河南理工大学 | Multi-amplitude ultrasonic pulling-twisting testing device for testing mechanical properties of hard and crispy materials |
| CN105527180A (en) * | 2015-11-30 | 2016-04-27 | 中国航空工业集团公司沈阳飞机设计研究所 | Testing method for bending fatigue of metal material |
| CN106404566A (en) * | 2016-12-13 | 2017-02-15 | 天津旁耘科技有限公司 | Bed fatigue test controller for light, mechanical and electronic integration medical instrument |
| WO2024082337A1 (en) * | 2022-10-18 | 2024-04-25 | 中国科学院苏州生物医学工程技术研究所 | Stator design method for prosthetic hand ultrasonic driving structure, and stator |
-
2011
- 2011-10-26 CN CN2011204121204U patent/CN202285002U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776693A (en) * | 2014-01-15 | 2014-05-07 | 河南理工大学 | Multi-amplitude ultrasonic pulling-twisting testing device for testing mechanical properties of hard and crispy materials |
| CN103776693B (en) * | 2014-01-15 | 2015-12-09 | 河南理工大学 | The ultrasonic pull and torsion test device of many amplitudes for testing hard brittle material mechanical property |
| CN105527180A (en) * | 2015-11-30 | 2016-04-27 | 中国航空工业集团公司沈阳飞机设计研究所 | Testing method for bending fatigue of metal material |
| CN105527180B (en) * | 2015-11-30 | 2019-03-08 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of metal material bending fatigue testing method |
| CN106404566A (en) * | 2016-12-13 | 2017-02-15 | 天津旁耘科技有限公司 | Bed fatigue test controller for light, mechanical and electronic integration medical instrument |
| WO2024082337A1 (en) * | 2022-10-18 | 2024-04-25 | 中国科学院苏州生物医学工程技术研究所 | Stator design method for prosthetic hand ultrasonic driving structure, and stator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120627 Termination date: 20181026 |