CN109765129A - A resonant system that can realize multi-axis ultrasonic fatigue test - Google Patents
A resonant system that can realize multi-axis ultrasonic fatigue test Download PDFInfo
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- CN109765129A CN109765129A CN201910225947.5A CN201910225947A CN109765129A CN 109765129 A CN109765129 A CN 109765129A CN 201910225947 A CN201910225947 A CN 201910225947A CN 109765129 A CN109765129 A CN 109765129A
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims 2
- 238000012360 testing method Methods 0.000 abstract description 23
- 239000000463 material Substances 0.000 abstract description 12
- 238000006073 displacement reaction Methods 0.000 description 9
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- 238000012669 compression test Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
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Abstract
The invention relates to a resonance system capable of realizing multi-axis ultrasonic fatigue test, and belongs to the technical field of material fatigue test. The device comprises an energy converter, an amplitude transformer and an axial vibration conversion device or a torsional vibration conversion device, wherein the lower end of the energy converter is in threaded connection with the amplitude transformer, and the lower end of the amplitude transformer is connected with the axial vibration conversion device or the torsional vibration conversion device. The advantages are that: a resonance system with the resonance frequency of 20KHz is formed by the two conversion devices, the same ultrasonic generator, the transducer and the amplitude transformer, axial vibration and torsional vibration can be obtained through different conversion devices respectively, convenience and rapidness are realized, and the cost of test equipment is reduced.
Description
Technical field
The invention belongs to fatigue test of materials technical field, it is tired to relate generally to axial and twisting vibration in Ultrasonic fatigue testing
Labor test.
Background technique
Ultrasonic fatigue testing technology is that ultrasonic signal is converted electrical signals to using supersonic generator, and energy converter will be high
Frequency electric signal is converted into same frequency mechanical oscillation signal, and by amplitude transformer by displacement equations, what is at this moment obtained is axial vibration, warp
Axial vibration is converted twisting vibration by torsion measurement converting means, to realize that the high frequency to torsion test specimen loads.
Important mechanical part on motor-car and aerospace will bear prolonged high frequency circulation in its service phase and carry
The effect of lotus, load cycle can reach 109More than, belong to super high cycle fatigue scope.And super high cycle fatigue research at present
Hot spot is concentrated mainly on the fatigue of materials performance under Axial Loads.As the mechanical part of transmission shaft etc is in actual operating condition
Under can also bear torsional load, for material in Very High Cycle scope about material torsional load or multiaxial loading effect under
The research work of fatigue strength is less.
Summary of the invention
The present invention provides a kind of resonator system of achievable multi-axis ultrasonic fatigue test, to solve existing ultrasonic vibration technology
In shortcoming, by utilize resonance principle, ultrasonic loading device under 20KHz frequency to test specimen realize Very High Cycle multiaxis carry
Lotus fatigue test allows a set of ultrasonic vibration system to carry out axial and two kinds of Ultrasonic fatigue testings of torsion by conversion equipment.
The technical solution adopted by the present invention is that: turn including energy converter, amplitude transformer, axial vibration conversion equipment or twisting vibration
Changing device, energy converter lower end are threadedly coupled with amplitude transformer, and amplitude transformer lower end connects axial Vibration changer or twisting vibration turns
Changing device.
The axial vibration conversion equipment includes upper clamp device and lower clamp device, and upper clamp device and lower clamp device pass through cylinder
The connection of body test specimen.
The upper clamp device and lower clamp device are symmetrical.
The twisting vibration conversion equipment includes metallic rotary body and four bolts, and there is interior spiral shell in metallic rotary body front end
There are helicla flute in line, upper end, and there are two the threaded hole that radial section and four are used for clamping, bolts to connect respectively with threaded hole for lower end
It connects.
The invention has the advantages that
1. forming a resonance frequency by two kinds of conversion equipments and same set of supersonic generator, energy converter and amplitude transformer
For the resonance system of 20KHz, axial vibration and twisting vibration can be obtained by different conversion equipments respectively, it is convenient and efficient,
Reduce testing equipment cost.
2. axial vibration conversion equipment and supersonic generator, energy converter, it is 20KHz that amplitude transformer, which collectively constitutes a frequency,
Resonator system, Ultrasonic test can be carried out for different material, it is only necessary to which the material for replacing intermediate cylindrical is greatly saved
Time and experimentation cost, improve efficiency.
3. maximum stress (displacement point) can be made to concentrate on middle circle shell of column in ultrasonic axial vibration fatigue test, and
Without worrying to be subjected to displacement an offset as stretched wire type test specimen, maximum test effect can be reached.
4. ultrasound torsion conversion equipment bottom is furnished with fixture, expected position can wanted for different material and test specimen
Set carry out torsional fatigue test.
5. twisting vibration conversion equipment bottom can measure corresponding torsion angle by cross section transverse and laser displacement sensor,
It is easy to operate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the present invention uses axial vibration conversion equipment；
Fig. 2 is the structural schematic diagram that the present invention uses twisting vibration conversion equipment；
Fig. 3 is the structural schematic diagram of clamp device in the present invention；
Fig. 4 is the structural schematic diagram of clamp device under the present invention；
Fig. 5 is the structural schematic diagram of intermediate cylindrical test specimen of the present invention；
Fig. 6 is the bolt arrangement schematic diagram of twisting vibration conversion equipment of the present invention；
Fig. 7 is the structural schematic diagram of metallic rotary body of the present invention；
Fig. 8 is the structural schematic diagram of present invention torsion test specimen.
Specific embodiment
Including energy converter 1, amplitude transformer 2, axial vibration conversion equipment 3 or twisting vibration conversion equipment 4, energy converter 1 it is upper
End is connected with supersonic generator, and 1 lower end of energy converter is threadedly coupled with amplitude transformer 2, and 2 lower end of amplitude transformer connects axial vibration conversion
Device 3 or twisting vibration conversion equipment 4, to realize multi-axis ultrasonic fatigue test.
The axial vibration conversion equipment 3 includes upper clamp device 301 and lower clamp device 302, upper clamp device 301 and lower clamping
Device 302 is connected by cylinder test specimen 5.
The upper clamp device 301 and lower clamp device 302 are symmetrical.
The twisting vibration conversion equipment 4 includes metallic rotary body 401 and four bolts 402, before the metallic rotary body
There is internal screw thread at end, and there is helicla flute 403 in upper end, can convert axial vibration to twisting vibration, there are two radial sections 404 for lower end
The threaded hole 405 of clamping is used for four, bolt to be connect with threaded hole respectively.
Working principle:
When carrying out ultrasonic test specimen tensile compression test using axial vibration conversion equipment 3, by the required design of material tested
At cylindrical specimen 5, upper clamp device 301 is closely connected by screw thread and 2 end of amplitude transformer, intermediate cylindrical test specimen 5 passes through screw thread
Connection is closely connect with upper and lower symmetrical clamp device, maximum stress can be made to concentrate on middle circle in ultrasonic axial test in this way
On cylindrical material；Ultrasound resonance system is formed between energy converter 1, amplitude transformer 2 and axial vibration conversion equipment 3, resonance frequency is
20KHz carries out ultrasonic fatigue to any materials by axial vibration conversion equipment 3 when to carry out ultrasonic repeated tension and compression test
Vibration test, intermediate test specimen 5 can be replaced according to material.
When carrying out ultrasonic test specimen torsion test using twisting vibration conversion equipment 4, designed test specimen 6 is passed through into torsion vibration
Turn changing device 4 is connected with ultrasonic transducer 1, amplitude transformer 2, and the helicla flute 403 by reversing conversion equipment surface upper end will
Ultrasonic axial vibration is converted to ultrasonic torsion vibration, directly carries out ultrasonic torsion test, and resonance frequency 20KHz passes through laser
The displacement of displacement sensor radial direction section 404, converts radial displacement for torsional displacement, can be accommodated by bolt 402
Irregular rock can carry out ultrasonic torsion test in the end face for wanting measurement torsional displacement.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225947.5A CN109765129A (en) | 2019-03-22 | 2019-03-22 | A resonant system that can realize multi-axis ultrasonic fatigue test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910225947.5A CN109765129A (en) | 2019-03-22 | 2019-03-22 | A resonant system that can realize multi-axis ultrasonic fatigue test |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161048A (en) * | 2019-06-17 | 2019-08-23 | 西南交通大学 | Super high cycle fatigue damage test system based on advanced light source in situ imaging |
| CN110522496A (en) * | 2019-08-30 | 2019-12-03 | 盈甲医疗科技(北京)有限公司 | A kind of ultrasonic surgical instrument amplitude transformer and its ultrasonic surgical instrument |
| CN111189725A (en) * | 2020-01-08 | 2020-05-22 | 吉林大学 | A loading device and method for asymmetric cyclic loading of a test piece |
| CN113203645A (en) * | 2021-05-12 | 2021-08-03 | 华东理工大学 | Ultrahigh cycle fatigue damage detection system and method based on nonlinear laser ultrasound |
| CN113588405A (en) * | 2021-08-01 | 2021-11-02 | 北京工业大学 | Device capable of realizing ultrahigh cycle tension-torsion composite fatigue test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111189725A (en) * | 2020-01-08 | 2020-05-22 | 吉林大学 | A loading device and method for asymmetric cyclic loading of a test piece |
| CN111189725B (en) * | 2020-01-08 | 2021-04-09 | 吉林大学 | A loading device and method for asymmetric cyclic loading of a test piece |
| CN113203645A (en) * | 2021-05-12 | 2021-08-03 | 华东理工大学 | Ultrahigh cycle fatigue damage detection system and method based on nonlinear laser ultrasound |
| CN113588405A (en) * | 2021-08-01 | 2021-11-02 | 北京工业大学 | Device capable of realizing ultrahigh cycle tension-torsion composite fatigue test |
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Application publication date: 20190517 |