CN102830029A - Fretting-wear ultrasonic-vibration ultralong-life fatigue test apparatus - Google Patents
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- CN102830029A CN102830029A CN201110328563XA CN201110328563A CN102830029A CN 102830029 A CN102830029 A CN 102830029A CN 201110328563X A CN201110328563X A CN 201110328563XA CN 201110328563 A CN201110328563 A CN 201110328563A CN 102830029 A CN102830029 A CN 102830029A
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Abstract
The invention discloses a fretting-wear ultrasonic-vibration ultralong-life fatigue test apparatus. The apparatus comprises an ultrasonic fatigue test device, a fretting wear device (6) and a temperature test device, wherein the ultrasonic fatigue test device comprises a computer system (1), an ultrasonic generator (2) and a piezoelectric ceramic energy transducer (3) which are sequentially connected; the lower end of the piezoelectric ceramic energy transducer (3) is fixedly connected with a amplitude transformer (4); the output end of the amplitude transformer (4) is connected with a cylindrical extension rod (5) coaxial to the amplitude transformer (4); the size of the cross section of the output end of the amplitude transformer (4) is equal to the size of the cross section of the extension rod (5); and the temperature test device comprises a temperature test meter (8). By adopting the above structure, the apparatus has the advantages of experiment design difficulty reduction and high test precision.
Description
Technical field
The present invention relates to fatigue experimental device, specifically is fine motion friction ultrasonic vibration extra long life fatigue experimental device.
Background technology
The fine motion fatigue under scrubbing is meant and closely cooperates parts under fatigue load, comes in contact the relative motion of micron dimension between the interface usually, and causes fret wear or produce fatigue crack.The fine motion friction can cause the surface of contact surface abrasion, causes the member interlock, becomes flexible and cause noise increase etc.; Fine motion friction can the accelerate fatigue germinating and the expansion of crackle reduce the fatigue lifetime of member greatly.In fields such as aviation, railway and machinery, occur easily causing the parts fault, even the disaster accident occurs because of the fine motion fatigue under scrubbing loses efficacy.Nearly two during the last ten years, and along with the development of medical skill, the problem of fine motion fatigue under scrubbing has also appearred in medical fields such as bone transplanting and dentistry.Domestic and international many researchers have also carried out series of experiment research to fatigue under scrubbing, but the Fretting Fatigue Damage process is very complicated, is usually directed to fatigue, weares and teares and corrodes three types of main failure modes, and influence factor is nearly individual surplus in the of 50.Fretting fatigue behavior and failure effect factor that the research of fine motion fatigue under scrubbing mainly concentrates on certain material of high and low cycle fatigue scope reach how to improve the fretting fatigue performance through certain process for treating surface.Why Research of Fatigue Life is limited in all scopes of height; Be owing to receive the restriction of experimental facilities; Traditional servo-hydraulic experimental machine frequency can only reach 10-100Hz; Carry out the extra long life fatigue experiment, several months consuming time even last year, same experiment then only needs tens minutes to several hours with the fatigue experiment (frequency 20 KHz) of ultrasonic vibration acceleration cycle stress.In recent years, Mason begins to be applied to fatigue break research [Roth L D. Ultrasonic fatigue testing, Metals Handbook [M] .Ninth Edition based on piezoelectricity magnetostriction principle and ultrasonic (or piezoelectric vibration) fatigue method of utilizing the high-energy ultrasound harmonic technology to set up; ASM, Metals Park, Ohio; USA; 1987,8:240 ~ 25.], its frequency of operation is generally at 15 ~ 22 kHz.Because save experimental 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.
The fretting fatigue testing device must carry out the test of torture test and fretting damage simultaneously; Wherein fatigue experimental device is based on existing extra long life torture test, and the fretting damage test unit must indispensable following function: at first can make the sample surface in contact produce relative motion a little; Secondly can apply contact pressure to the sample surface in contact; Moreover can control and measure the correlation test parameter.
At present, the device that is used for the torture test of fine motion friction ultrasonic vibration extra long life mainly comprises two parts: first is the ultrasonic vibration fatigue device, comprising: computer system, ultrasonic generator, piezoelectric ceramic transducer, horn and temperature measurer; Second portion is a fine motion friction transposition, comprising: resistance head, clamping rings and bolt.Its groundwork principle is: the electric signal of 50Hz is changed into the ultrasonic sinusoidal wave electric signal output of 20KHz by ultrasonic generator; Be transformed into mechanical oscillation signal to electric signal by piezoelectric ceramic transducer again; Last horn is amplified to the required displacement amplitude of sample to the vibration displacement amplitude from piezoelectric ceramic transducer, the output length travel in the horn end.But owing to be the fine motion friction, this moment, the mechanical behavior of material was very complicated, was difficult to reach the essential sample of ultrasonic fatigue experiment and the requirement of experimental system resonance, and design difficulty is very high, simultaneously, because the fricative temperature of fine motion also possibly influence the precision of experiment.
Summary of the invention
The invention provides fine motion friction ultrasonic vibration extra long life fatigue experimental device, solved the problem that the friction of fine motion in the past extra long life fatigue experimental device experimental precision is not high, design difficulty is bigger.
The present invention is that the technical solution problem mainly realizes through following technical scheme: fine motion friction ultrasonic vibration extra long life fatigue experimental device; Comprise ultrasonic fatigue test unit, fine motion rubbing device and temperature test device, the ultrasonic fatigue test unit comprises computer system, ultrasonic generator, the piezoelectric ceramic transducer that connects successively, and the lower end of piezoelectric ceramic transducer is fixedly connected with horn; The output terminal of horn is connected with the cylindrical extension rod coaxial with horn; The xsect equal and opposite in direction of the xsect of the output terminal of horn and extension rod, the temperature test device comprises temperature measurer, is provided with bracing or strutting arrangement under the said extension rod; The fine motion rubbing device is fixed on the bracing or strutting arrangement; Said fine motion rubbing device comprises the clamping rings that has two fixed orifices and is arranged on the bolt on the clamping rings through fixed orifice, and fixed orifice is provided with internal thread, and internal thread matches with external thread on the bolt; Two fixed hole positions are on the same diameter of clamping rings; The spiro rod length of bolt is greater than the radius of clamping rings, and the head of bolt is positioned at outside the clamping rings, and the front end of bolt is fixedly connected with resistance head.Computer system mainly is the control ultrasonic generator test figure relevant with record; Ultrasonic generator is the ultrasonic sinusoidal wave electric signal output that the electric signal of 50Hz is changed into 20KHz; Piezoelectric ceramic transducer is to be transformed into mechanical oscillation signal to electric signal; And horn is to be amplified to the required displacement amplitude of sample to the vibration displacement amplitude from piezoelectric ceramic transducer, and the output length travel in the horn end; Be used to place sample between the resistance head, the bolt of screwing then lets resistance head and sample realize the fine motion friction.
The front end surface of contact of said resistance head is a sphere.
The front end surface of contact of said resistance head is the plane.
Said bracing or strutting arrangement is a triangular support bracket.
The present invention compared with prior art has the following advantages and beneficial effect:
(1) the present invention increases the fine motion rubbing device on the basis of existing ultrasonic vibration fatigue system; Can study the superelevation week fatigue behaviour under the fretting damage; And according to friction condition actual in the industry; The shape of the front end surface of contact through changing resistance head realizes sphere/plane and the two kinds of ways of contact in plane/plane.
(2) the present invention's easy operating simple in structure adopts temperature measurer that the temperature of the friction section of sample is measured in real time, and then can draw the fatigue test results under the different temperatures, improves test accuracy.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention;
Fig. 2 is the structural representation of the fine motion rubbing device of embodiments of the invention 1;
Fig. 3 is the structural representation of the fine motion rubbing device of embodiments of the invention 2;
Structural representation when Fig. 4 works for the present invention;
Fig. 5 is a connection block diagram of the present invention.
Pairing Reference numeral is in the accompanying drawing: 1, computer system, 2, ultrasonic generator, 3, piezoelectric ceramic transducer, 4, horn; 5, sample, 6, the fine motion rubbing device, 7, bracing or strutting arrangement; 8, temperature measurer, 9, sample, 10, clamping rings; 11, bolt, 12, resistance head, 13, fixed orifice.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed description, but embodiment of the present invention is not limited thereto.
Embodiment 1:
Like Fig. 1, Fig. 2 and shown in Figure 4; The present invention includes ultrasonic fatigue test unit, fine motion rubbing device 6 and temperature test device; The ultrasonic fatigue test unit comprises successively computer system 1, ultrasonic generator 2, the piezoelectric ceramic transducer 3 that connects, and the lower end of piezoelectric ceramic transducer 3 is fixedly connected with horn 4, and the output terminal of horn 4 is connected with the cylindrical extension rod 5 coaxial with horn 4; The xsect equal and opposite in direction of the xsect of the output terminal of horn 4 and extension rod 5; The temperature test device comprises temperature measurer 8, and temperature measurer 8 is used to measure the temperature of sample friction section, is provided with bracing or strutting arrangement 7 under the extension rod 5; Bracing or strutting arrangement 7 is a triangular support bracket, and fine motion rubbing device 6 is fixed on the bracing or strutting arrangement 7.
The fine motion rubbing device 6 of present embodiment comprises the clamping rings 10 that has two fixed orifices 13 and is arranged on the bolt 11 on the clamping rings 10 through fixed orifice 13; Fixed orifice 13 is provided with internal thread; Internal thread matches with external thread on the bolt 11; Two fixed orifices 13 are positioned on the same diameter of clamping rings 10, and the spiro rod length of bolt 11 is greater than the radius of clamping rings 10, and the head of bolt 11 is positioned at outside the clamping rings 10; The front end of bolt 11 is fixedly connected with resistance head 12, and the front end surface of contact of resistance head 12 is a sphere.
Displacement amplitude according to sample is gone up actual friction condition with industry; Confirm that sample is placed in the position on the fine motion rubbing device 6; According to the position that rubs on the sample, the position of adjustment clamping rings 10 and bolt 11 obtains final frictional position; And exert pressure through adjustment resistance head 12 pairs of sample surface of contact and to realize the fine motion friction, measure the pressure of resistance head 12 this moment with dynamometer.
Embodiment 2:
Basic identical like Fig. 1, Fig. 3 and Fig. 4 present embodiment and embodiment 1, different places is that the front end surface of contact of resistance head 12 is the plane.
Principle of work of the present invention is: as shown in Figure 5; At first; 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 sample 9 to the vibration displacement amplitudes from piezoelectric ceramic transducer 3; Confirm to install the position of fine motion rubbing device 6 simultaneously according to displacement amplitude, realize the fine motion friction system.Wherein, The fine motion friction system is according to the position that rubs on the sample; The position that the position of adjustment clamping rings 10 and bolt 11 obtains rubbing, and exert pressure through 12 pairs of sample surface of contact of adjustment resistance head and to realize the fine motion friction, the pressure of resistance head 12 measured with dynamometer.Sample 5 begins vibration, and the fine motion rubbing device realizes that sample is under the fine motion friction environment vibration cycle of computer system 1 record sample; Temperature measurer 7 is measured the temperature of sample 5 in real time.At last, the vibration cycle of the sample 9 through computer system 1 record is judged the degree of fatigue of sample 9, when the vibration cycle less than 10
5The time, this sample 9 is low-cycle fatigue; When the vibration cycle is 10
5~ 10
7The time, this sample 9 is a high cycle fatigue; When vibrating cycle greater than 10
7When inferior, this sample 9 is that superelevation week is tired.
As stated, then can realize the present invention well.
Claims (4)
1. fine motion friction ultrasonic vibration extra long life fatigue experimental device; Comprise ultrasonic fatigue test unit, fine motion rubbing device (6) and temperature test device; The ultrasonic fatigue test unit 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); The output terminal of horn (4) is connected with the cylindrical extension rod (5) coaxial with horn (4); The xsect equal and opposite in direction of the xsect of the output terminal of horn (4) and extension rod (5), temperature test device comprise temperature measurer (8), it is characterized in that: be provided with bracing or strutting arrangement (7) under the said extension rod (5); Fine motion rubbing device (6) is fixed on the bracing or strutting arrangement (7); Said fine motion rubbing device (6) comprises the clamping rings (10) that has two fixed orifices (13) and is arranged on the bolt (11) on the clamping rings (10) through fixed orifice (13), and fixed orifice (13) is provided with internal thread, and internal thread matches with external thread on the bolt (11); Two fixed orifices (13) are positioned on the same diameter of clamping rings (10); The spiro rod length of bolt (11) is greater than the radius of clamping rings (10), and the head of bolt (11) is positioned at outside the clamping rings (10), and the front end of bolt (11) is fixedly connected with resistance head (12).
2. fine motion friction ultrasonic vibration extra long life fatigue experimental device according to claim 1, it is characterized in that: the front end surface of contact of said resistance head (12) is a sphere.
3. fine motion friction ultrasonic vibration extra long life fatigue experimental device according to claim 1, it is characterized in that: the front end surface of contact of said resistance head (12) is the plane.
4. fine motion friction ultrasonic vibration extra long life fatigue experimental device according to claim 1, it is characterized in that: said bracing or strutting arrangement (7) is a triangular support bracket.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278411A (en) * | 2013-05-14 | 2013-09-04 | 吉林大学 | Spherical contact type friction characteristic testing device under ultrasonic vibration |
| 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 |
| CN104458253A (en) * | 2014-12-31 | 2015-03-25 | 华侨大学 | Contact pair part fatigue test device based on ultrasonic vibration |
| CN104614228A (en) * | 2014-12-19 | 2015-05-13 | 西南交通大学 | A device for testing ultrasonic vibration extra-long life fatigue of a material under a high-pressure state |
| CN106990004A (en) * | 2017-04-26 | 2017-07-28 | 中国科学院金属研究所 | It is a kind of with the fretting fatigue testing device of HTHP recirculated water and its application |
| CN108871768A (en) * | 2018-07-19 | 2018-11-23 | 湘潭大学 | Involute spline pair fretting wear experimental rig under a kind of ultrasonic vibration |
| CN109100423A (en) * | 2018-10-15 | 2018-12-28 | 吉林大学 | Damage of rock test experimental bed under a kind of ultrasonic activation |
| CN109282919A (en) * | 2018-07-05 | 2019-01-29 | 西安电子科技大学 | A kind of modified piezoelectric ceramic piece method for measuring stress and measuring device |
| JP2019505807A (en) * | 2016-02-04 | 2019-02-28 | インスティテュト スペリオール テクニコ | Equipment for ultrasonic frequency fatigue testing with axial and torsional multi-axis regimes |
| CN110146397A (en) * | 2019-05-24 | 2019-08-20 | 西北工业大学 | One kind being bolted interface micro-moving frictional wear test device and its method |
| CN110702549A (en) * | 2019-10-09 | 2020-01-17 | 西北工业大学 | Fretting wear test device based on ultrasonic technology |
| CN111855447A (en) * | 2020-07-30 | 2020-10-30 | 四川大学 | Ultrasonic fatigue stress amplifying device with unified sample size |
| CN113865869A (en) * | 2021-09-26 | 2021-12-31 | 武汉晶泰科技股份有限公司 | Bearing rolling body fatigue resistance test device |
| CN114323996A (en) * | 2021-12-28 | 2022-04-12 | 浙江工业大学 | Tiny sample bending fatigue test device and method based on acoustic radiation force |
| CN114459711A (en) * | 2021-12-31 | 2022-05-10 | 北京工业大学 | Variable-temperature ultrahigh-cycle multi-axial fatigue test device with variable stress ratio |
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| CN105738236B (en) * | 2016-05-05 | 2018-04-27 | 西北工业大学 | A kind of ultrasound high frequency ball fretting fatigue experimental rig |
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| CN103278411A (en) * | 2013-05-14 | 2013-09-04 | 吉林大学 | Spherical contact type friction characteristic testing device under ultrasonic vibration |
| CN103278411B (en) * | 2013-05-14 | 2016-04-13 | 吉林大学 | Ultrasonic vibration lower peripheral surface contact-type frictional characteristic test device |
| 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 |
| CN104614228A (en) * | 2014-12-19 | 2015-05-13 | 西南交通大学 | A device for testing ultrasonic vibration extra-long life fatigue of a material under a high-pressure state |
| CN104458253A (en) * | 2014-12-31 | 2015-03-25 | 华侨大学 | Contact pair part fatigue test device based on ultrasonic vibration |
| JP2019505807A (en) * | 2016-02-04 | 2019-02-28 | インスティテュト スペリオール テクニコ | Equipment for ultrasonic frequency fatigue testing with axial and torsional multi-axis regimes |
| CN106990004A (en) * | 2017-04-26 | 2017-07-28 | 中国科学院金属研究所 | It is a kind of with the fretting fatigue testing device of HTHP recirculated water and its application |
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| CN109282919B (en) * | 2018-07-05 | 2019-09-03 | 西安电子科技大学 | A kind of modified piezoelectric ceramic piece method for measuring stress and measuring device |
| CN108871768B (en) * | 2018-07-19 | 2020-08-04 | 湘潭大学 | Involute spline pair fretting wear test device under ultrasonic vibration |
| CN108871768A (en) * | 2018-07-19 | 2018-11-23 | 湘潭大学 | Involute spline pair fretting wear experimental rig under a kind of ultrasonic vibration |
| CN109100423A (en) * | 2018-10-15 | 2018-12-28 | 吉林大学 | Damage of rock test experimental bed under a kind of ultrasonic activation |
| CN110146397B (en) * | 2019-05-24 | 2021-07-09 | 西北工业大学 | Bolt connection interface fretting friction wear testing device and method thereof |
| CN110146397A (en) * | 2019-05-24 | 2019-08-20 | 西北工业大学 | One kind being bolted interface micro-moving frictional wear test device and its method |
| CN110702549A (en) * | 2019-10-09 | 2020-01-17 | 西北工业大学 | Fretting wear test device based on ultrasonic technology |
| CN111855447A (en) * | 2020-07-30 | 2020-10-30 | 四川大学 | Ultrasonic fatigue stress amplifying device with unified sample size |
| CN113865869A (en) * | 2021-09-26 | 2021-12-31 | 武汉晶泰科技股份有限公司 | Bearing rolling body fatigue resistance test device |
| CN114323996A (en) * | 2021-12-28 | 2022-04-12 | 浙江工业大学 | Tiny sample bending fatigue test device and method based on acoustic radiation force |
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| CN114459711B (en) * | 2021-12-31 | 2024-03-08 | 北京工业大学 | Variable-temperature ultrahigh-cycle multiaxial fatigue test device with variable stress ratio |
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