JP3308667B2 - Ultrasonic vibration type fatigue tester - Google Patents
Ultrasonic vibration type fatigue testerInfo
- Publication number
- JP3308667B2 JP3308667B2 JP19905393A JP19905393A JP3308667B2 JP 3308667 B2 JP3308667 B2 JP 3308667B2 JP 19905393 A JP19905393 A JP 19905393A JP 19905393 A JP19905393 A JP 19905393A JP 3308667 B2 JP3308667 B2 JP 3308667B2
- Authority
- JP
- Japan
- Prior art keywords
- test piece
- ultrasonic vibration
- temperature
- fatigue tester
- vibration type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、超音波振動式疲労試験
機に関し、特に、金属、セラミックス、高分子等の各種
固体材料の疲労強度を広範囲な温度範囲にわたって短時
間で測定できるようにしたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic vibration type fatigue tester, and more particularly to an ultrasonic vibration type fatigue tester capable of measuring the fatigue strength of various solid materials such as metals, ceramics and polymers in a short time over a wide temperature range. Things.
【０００２】[0002]
【従来の技術】従来、この種の振動式疲労試験機は、５
００Ｈｚ以下の低周波式に限定され、しかも、常温測定
におけるもののみであった。また、低周波式であるた
め、繰返し数が１０6以上となるもので、測定には長時
間を要するものであった。2. Description of the Related Art Conventionally, this type of vibration-type fatigue tester has
It was limited to the low-frequency type of 00 Hz or less, and was only for room temperature measurement. In addition, because of the low frequency type, the number of repetitions was 10 6 or more, and the measurement required a long time.
【０００３】[0003]
【発明が解決しようとする課題】このようなことから、
振動式疲労試験機では、測定温度領域の拡大および短時
間測定を可能とした材料疲労試験機の開発が問題点にな
っていた。SUMMARY OF THE INVENTION
With the vibration-type fatigue tester, the development of a material fatigue tester capable of expanding the measurement temperature range and enabling short-time measurement has been a problem.
【０００４】[0004]
【課題を解決するための手段】本発明は、上述の点に鑑
みなされたもので、試験片保持具に支持された試験片に
は、超音波振動するホ−ンによって荷重および振動が与
えられるように構成したものであり、また、試験片保持
具が温度調整可能な雰囲気炉内に配置されるように構成
したものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and a load and vibration are applied to a test piece supported by a test piece holder by a horn that vibrates ultrasonically. The test piece holder is arranged in a temperature-adjustable atmosphere furnace.
【０００５】また、この試験片保持具には、導波体が設
けられ、この導波体の炉外端では、常温に調整されると
ともに、試験片からの機械的振動を電気信号に変換する
ためのＡＥセンサおよびこれに接続される波形モニタが
備えられるように構成したものである。この場合、波形
モニタには、電算ユニットが接続されることにより、解
析能力を高めたり、試験継続の有無を判定することがで
きるものである。Further, a waveguide is provided on the test piece holder, and the temperature of the waveguide is adjusted to room temperature at the outer end thereof, and mechanical vibration from the test piece is converted into an electric signal. Sensor and a waveform monitor connected thereto are provided. In this case, by connecting the computer unit to the waveform monitor, it is possible to enhance the analysis capability and determine whether or not to continue the test.
【０００６】[0006]
【作用】本発明の超音波振動式疲労試験機は、試験片に
は、超音波振動するホ−ンによって荷重および振動が付
与されることから、材料疲労が短時間で発生するもので
ある。According to the ultrasonic vibration type fatigue tester of the present invention, since the load and the vibration are applied to the test piece by the ultrasonic vibrating horn, material fatigue occurs in a short time.
【０００７】また、試験片を支持する試験片保持具は、
温度調整可能な雰囲気炉内に配置されることから、広範
囲な温度領域に適用できるものである。[0007] Further, a test piece holder for supporting a test piece,
Since it is arranged in a temperature-adjustable atmosphere furnace, it can be applied to a wide temperature range.
【０００８】さらに、試験片の疲労状態は、炉外端で常
温維持された導波体に具備されたＡＥセンサによって、
電気信号として伝達され、波形モニタによって表示、記
録されるとともに、電算ユニットによって解析され、ま
た、試験継続の有無が判定される。Further, the fatigue state of the test piece is determined by an AE sensor provided on a waveguide maintained at room temperature at the outer end of the furnace.
It is transmitted as an electric signal, displayed and recorded by the waveform monitor, analyzed by the computer unit, and it is determined whether the test is continued.
【０００９】[0009]
【実施例】以下、本発明超音波振動式疲労試験機の一実
施例について、図を参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the ultrasonic vibration type fatigue tester of the present invention will be described below with reference to the drawings.
【００１０】図１において、１は、超音波振動する上下
動可能なホ−ンであり、このホ−ン１の超音波振動は、
圧電送信子２からブ−スタ−３を介して与えられる。そ
して、このホ−ン１は、高靭性、耐熱性および耐寒性の
ある材料からなり、試験片保持具４に取付けた試験片５
に対して荷重および振動を与える。したがって、この試
験片５は、ホ−ン１からの超音波振動により共振させら
れ、荷重負荷から、材料疲労が短時間で発生する。そし
て、図１は、全長Ｌを有する試験片５に対して、三点曲
げ型による場合が例示されている。すなわち、試験片５
は、支持長さｌで試験片保持具４によって両端支持さ
れ、その中央には、超音波振動する前記ホ−ン１によっ
て集中荷重が付与される。なお、超音波振動は、その振
幅が最大１００μｍ程度であり、共振条件は、試験片５
の形状、密度、断面二次モ−メントを用いて計算できる
ものである。そして、ホ−ン１の振動および荷重による
疲労曲線は、負荷荷重の関数となる。In FIG. 1, reference numeral 1 denotes a vertically movable horn for ultrasonic vibration. The ultrasonic vibration of the horn 1
It is provided from the piezoelectric transmitter 2 via the booster-3. The horn 1 is made of a material having high toughness, heat resistance, and cold resistance.
Load and vibration. Therefore, the test piece 5 is resonated by the ultrasonic vibration from the horn 1 and material fatigue occurs in a short time due to a load. FIG. 1 illustrates a case where a three-point bending die is used for a test piece 5 having an overall length L. That is, the test piece 5
Is supported at both ends by a test piece holder 4 having a support length l, and a concentrated load is applied to the center of the support by the horn 1 that vibrates ultrasonically. The ultrasonic vibration has an amplitude of about 100 μm at the maximum, and the resonance conditions
Can be calculated using the shape, density, and second-order moment of section. The fatigue curve due to the vibration and load of the horn 1 is a function of the applied load.
【００１１】前記試験片保持具４は、高靭性、耐熱性お
よび耐寒性のある超硬合金、ＳｉＣ，Ｓｉ3Ｎ4、Ｎｉ基
超合金などから作製されるもので、端部には、導波体６
が設けられている。そして、この試験片保持具４は、試
験片５の使用温度条件に適合できるように温度調整可能
な雰囲気炉７内に配置される。また、前記導波体６は、
金属製またはセラミックス製からなり、導波体６の炉外
端には、常温を維持する温度調節器８が設けられてい
る。導波体６の炉外端で常温維持としたのは、前記ＡＥ
センサ９が雰囲気炉７からの熱伝導による影響を受けな
いようにしたものである。したがって、温度調節器８
は、雰囲気炉７が高温雰囲気であれば水冷ジャケット、
低温雰囲気であれば加熱器が適用される。そして、常温
維持された導波体６の炉外端には、試験片５からの機械
的振動などを電気信号に変換するＡＥセンサ９が備えら
れる。The test piece holder 4 is made of a high-toughness, heat-resistant and cold-resistant cemented carbide, SiC, Si 3 N 4 , Ni-base superalloy or the like. Corrugated body 6
Is provided. The test piece holder 4 is placed in an atmosphere furnace 7 whose temperature can be adjusted so as to be compatible with the operating temperature conditions of the test piece 5. The waveguide 6 is
A temperature controller 8 that is made of metal or ceramics and that maintains the room temperature is provided at the outer end of the waveguide 6. The reason why the room temperature was maintained at the outer end of the waveguide body 6 was that the AE
The sensor 9 is not affected by the heat conduction from the atmosphere furnace 7. Therefore, the temperature controller 8
Is a water-cooled jacket if the atmosphere furnace 7 has a high temperature atmosphere,
If the temperature is low, a heater is applied. An AE sensor 9 that converts mechanical vibrations and the like from the test piece 5 into electric signals is provided at the outer end of the furnace of the waveguide 6 maintained at room temperature.
【００１２】前記雰囲気炉７の温度調整は、液体窒素温
度から１５００℃までの温度領域が考えられ、これは、
クライオスタットおよび加熱装置の適用により容易に得
られる。また、この雰囲気炉７の雰囲気は、１気圧から
５気圧までの空気、窒素、アルゴン、ヘリウム等のガス
および１０-4Ｔｏｒｒまでの真空に維持できることが好
ましい。これも、試験片５に適用された材料の使用環境
条件からの配慮である。The temperature of the atmosphere furnace 7 can be adjusted in a temperature range from liquid nitrogen temperature to 1500 ° C.
It is easily obtained by applying a cryostat and a heating device. It is preferable that the atmosphere of the atmosphere furnace 7 can be maintained at a pressure of 1 to 5 atm, such as air, nitrogen, argon, and helium, and a vacuum of 10 -4 Torr. This is also a consideration from the working environment conditions of the material applied to the test piece 5.
【００１３】また、前記ＡＥセンサ９には、超音波の周
波数、振幅、電力を監視し、異常時の発振停止信号を出
す波形モニタ１０が接続され、疲労状態が表示、記録さ
れる。そして、この波形モニタ１０には、材料疲労の解
析能を高める電算ユニット１１が接続される。この電算
ユニット１１は、例えばパソコン１１ａ、ディスプレイ
１１ｂおよびプリンタ１１ｃから構成される。The AE sensor 9 is connected to a waveform monitor 10 for monitoring the frequency, amplitude and power of the ultrasonic wave and outputting an oscillation stop signal in the event of an abnormality, and displays and records the fatigue state. Then, a computer unit 11 for improving the ability to analyze material fatigue is connected to the waveform monitor 10. The computer unit 11 includes, for example, a personal computer 11a, a display 11b, and a printer 11c.
【００１４】図２は、片持ち梁型の疲労試験機における
変形例を示したもので、試験片５は、突出し長さｌで、
試験片保持具４に支持され、超音波振動する前記ホ−ン
１によって荷重および振動が付与される。そして、試験
片５からの機械的振動は、導波体６からＡＥセンサ９に
伝達されるとともに、電気信号に変換されて、波形モニ
タ１０に表示され、記録される。また、電算ユニット１
１によって、演算処理、解析され、または、電算ユニッ
ト１１によって、試験継続の有無の判定がなされる。そ
して、測定結果は、がプリンタ１１ｃから、プリントア
ウトされる。FIG. 2 shows a modified example of a cantilever type fatigue tester, in which a test piece 5 has a protruding length l,
A load and vibration are applied by the horn 1 which is supported by the test piece holder 4 and vibrates ultrasonically. Then, the mechanical vibration from the test piece 5 is transmitted from the waveguide 6 to the AE sensor 9, converted into an electric signal, displayed on the waveform monitor 10, and recorded. Computer unit 1
By 1, arithmetic processing and analysis are performed, or the computer unit 11 determines whether or not to continue the test. Then, the measurement result is printed out from the printer 11c.
【００１５】次に、本発明超音波振動式疲労試験機によ
り、図１に示される三点曲げ型による材料疲労試験を行
なった例について説明する。Next, an example in which a material fatigue test using a three-point bending type shown in FIG. 1 is performed using the ultrasonic vibration type fatigue tester of the present invention will be described.
【００１６】試験片５は、Ｓｉ3Ｎ4系セラミックスで、
幅４ｍｍ×厚さ３ｍｍ×長さ３３ｍｍの形状を有し、常
温および６００℃における疲労曲線Ａ，Ｂをそれぞれ求
めた。この結果は、図３に示されるが、いずれも材料破
壊まで２分以内であった。なお、ホ−ン１は、材質がＴ
ｉ合金で、荷重については、１〜１００の範囲で変動さ
せ、また、振動条件は、周波数＝１７．７ＫＨ ｚ、振幅
＝９０μｍに設定した。The test piece 5 is made of SiThreeNFourSystem ceramics
It has a shape of width 4mm x thickness 3mm x length 33mm.
Temperature and 600 ° C fatigue curves A and B, respectively.
I did. The results are shown in FIG.
It took less than 2 minutes to break. The horn 1 is made of T
With i alloy, the load varies in the range of 1 to 100.
And the vibration condition is frequency = 17.7 KH z, amplitude
= 90 μm.
【００１７】[0017]
【発明の効果】本発明は、以上説明したように、試験片
５には、超音波振動するホ−ン１により、荷重および振
動が付与されるように構成したことから、試験片５の疲
労が短時間で測定できるものである。また、試験片５
は、所定の温度に調整された雰囲気炉７内で測定される
ことから、使用条件に一致する疲労が測定できるもので
ある。さらに、試験片５の測定は、ＡＥセンサ９、波形
モニタ１０および電算ユニット１１によって行なわれる
ことから、解析能も十分高められるという利点を有す
る。As described above, according to the present invention, since the load and the vibration are applied to the test piece 5 by the horn 1 which vibrates ultrasonically, the fatigue of the test piece 5 is improved. Can be measured in a short time. Test piece 5
Is measured in the atmosphere furnace 7 adjusted to a predetermined temperature, so that fatigue matching the use conditions can be measured. Furthermore, since the measurement of the test piece 5 is performed by the AE sensor 9, the waveform monitor 10, and the computer unit 11, there is an advantage that the analysis ability can be sufficiently enhanced.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明超音波振動式疲労試験機の一実施例を示
す概念的な説明図、FIG. 1 is a conceptual explanatory view showing an embodiment of an ultrasonic vibration type fatigue tester of the present invention,
【図２】他の実施例を示す同じく概念的な説明図、FIG. 2 is a conceptual explanatory view showing another embodiment,
【図３】図１に示された試験機により得られた疲労曲線
図。FIG. 3 is a fatigue curve diagram obtained by the tester shown in FIG.
１ ホ−ン ４ 試験片保持具 ５ 試験片 ６ 導波体 ７ 雰囲気炉 ８ 温度調節器 ９ ＡＥセンサ １０ 波形モニタ １１ 電算ユニット DESCRIPTION OF SYMBOLS 1 Horn 4 Test piece holder 5 Test piece 6 Waveguide 7 Atmosphere furnace 8 Temperature controller 9 AE sensor 10 Waveform monitor 11 Computer unit
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 3/34 G01N 29/00 ＪＩＣＳＴファイル（ＪＯＩＳ)Continuation of the front page (58) Field surveyed (Int. Cl. 7 , DB name) G01N 3/34 G01N 29/00 JICST file (JOIS)
Claims (2)
は、超音波振動するホ−ン１によって荷重及び振動が与
えられ、これに伴って、この試験片５の疲労を測定する
ようにした超音波振動式疲労試験機において、 導波体６を備えた前記試験片保持具４は、温度調整可能
な雰囲気炉７に配置されるとともに、常温維持に温度調
整されている前記導波体６の炉外端には、試験片５から
の機械的振動を電気信号に変換するＡＥセンサ９が備え
られ、このＡＥセンサ９に接続された波形モニタ１０に
よって前記試験片５の疲労が測定されるようにしたこと
を特徴とする超音波振動式疲労試験機。A load and vibration are applied to a test piece 5 supported by a test piece holder 4 by a horn 1 that vibrates ultrasonically, and the fatigue of the test piece 5 is measured accordingly. In the ultrasonic vibration type fatigue tester as described above, the test piece holder 4 provided with the waveguide 6 is placed in an atmosphere furnace 7 capable of adjusting the temperature, and the temperature of the sample holder 4 is adjusted to a normal temperature. An AE sensor 9 that converts mechanical vibration from the test piece 5 into an electric signal is provided at the outer end of the corrugated body 6, and the waveform monitor 10 connected to the AE sensor 9 reduces the fatigue of the test piece 5. An ultrasonic vibration type fatigue tester characterized by being measured.
は、電算処理ユニット１１が接続されている請求項１記
載の超音波振動式疲労試験機。2. The ultrasonic vibration type fatigue tester according to claim 1, wherein a computer processing unit is connected to the waveform monitor according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19905393A JP3308667B2 (en) | 1993-07-16 | 1993-07-16 | Ultrasonic vibration type fatigue tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19905393A JP3308667B2 (en) | 1993-07-16 | 1993-07-16 | Ultrasonic vibration type fatigue tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0735668A JPH0735668A (en) | 1995-02-07 |
| JP3308667B2 true JP3308667B2 (en) | 2002-07-29 |
Family
ID=16401330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19905393A Expired - Fee Related JP3308667B2 (en) | 1993-07-16 | 1993-07-16 | Ultrasonic vibration type fatigue tester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3308667B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005091318A (en) * | 2003-09-19 | 2005-04-07 | Fuji Kogyo Kk | Ultrasonic densitometer |
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| JP2002286605A (en) * | 2001-03-23 | 2002-10-03 | Ishikawajima Harima Heavy Ind Co Ltd | Method and device for high strain rate fatigue test |
| AU2003281570A1 (en) * | 2002-07-19 | 2004-02-09 | Consejo Superior De Investigaciones Cientificas | Method and device for examining fatigue resistance of metallic materials at ultrasonic frequencies and constant temperature |
| JP2008281544A (en) * | 2007-04-13 | 2008-11-20 | Noriyuki Hisamori | Fatigue tester |
| US9297731B2 (en) | 2010-04-06 | 2016-03-29 | Varel Europe S.A.S | Acoustic emission toughness testing for PDC, PCBN, or other hard or superhard material inserts |
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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 |
| US11631653B2 (en) | 2017-02-03 | 2023-04-18 | Mitsubishi Electric Corporation | Ultrasonic bonding apparatus, ultrasonic bonding inspection method and ultrasonically-bonded portion fabrication method |
| CN106950280B (en) * | 2017-03-16 | 2019-04-12 | 东北大学 | Fibre reinforced composites parameter identification method based on the lossless scanning of laser |
| JP7180572B2 (en) * | 2019-09-17 | 2022-11-30 | 株式会社島津製作所 | material testing machine |
-
1993
- 1993-07-16 JP JP19905393A patent/JP3308667B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005091318A (en) * | 2003-09-19 | 2005-04-07 | Fuji Kogyo Kk | Ultrasonic densitometer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0735668A (en) | 1995-02-07 |
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