JP3296627B2 - Vibration fatigue testing machine - Google Patents
Vibration fatigue testing machineInfo
- Publication number
- JP3296627B2 JP3296627B2 JP14829393A JP14829393A JP3296627B2 JP 3296627 B2 JP3296627 B2 JP 3296627B2 JP 14829393 A JP14829393 A JP 14829393A JP 14829393 A JP14829393 A JP 14829393A JP 3296627 B2 JP3296627 B2 JP 3296627B2
- Authority
- JP
- Japan
- Prior art keywords
- sample
- load
- vibration fatigue
- rotor
- unbalanced
- 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 Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は試料に長期間一定周期の
振動を与え続けて、物性値の変化を測定するための振動
疲労試験機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration fatigue tester for measuring a change in a physical property value by continuously applying vibration to a sample for a long period of time.
【０００２】[0002]
【従来の技術】図３は従来の振動疲労試験機の構成図で
あり、図４は従来の振動疲労試験機に用いられている不
平衡振り子の構成図である。ここで、１は試料，２は試
料ホルダー，３は不平衡振り子，４は水平拘束ばね，５
は荷重ばね，６はモーター，７は回転子，８は重りであ
る。振動疲労試験機は主に試料ホルダー２と不平衡振り
子３と水平拘束ばね４と荷重ばね５とモーター６から構
成されている。モーター６で不平衡振り子３を回転させ
ることにより振動を発生させて、試料ホルダー２に装着
した試料１に負荷を与えるしくみになっている。不平衡
振り子３は主に回転子７と重り８とから構成されてい
る。一端に重り８を取り付けた回転子７を回転させて遠
心力で振動を発生させ、その遠心力の水平方向の分力を
水平拘束ばね４で拘束して垂直方向の分力を取り出し、
この垂直方向の分力が試料ホルダー２の一端に伝わって
試料に負荷を与えるしくみになっている。2. Description of the Related Art FIG. 3 is a configuration diagram of a conventional vibration fatigue tester, and FIG. 4 is a configuration diagram of an unbalanced pendulum used in the conventional vibration fatigue tester. Here, 1 is a sample, 2 is a sample holder, 3 is an unbalanced pendulum, 4 is a horizontal restraining spring, 5
Is a load spring, 6 is a motor, 7 is a rotor, and 8 is a weight. The vibration fatigue tester mainly includes a sample holder 2, an unbalanced pendulum 3, a horizontal restraining spring 4, a load spring 5, and a motor 6. The unbalanced pendulum 3 is rotated by the motor 6 to generate vibrations, thereby applying a load to the sample 1 mounted on the sample holder 2. The unbalanced pendulum 3 mainly includes a rotor 7 and a weight 8. A rotor 7 having a weight 8 attached to one end is rotated to generate vibration by centrifugal force, and a horizontal component of the centrifugal force is restrained by a horizontal restraining spring 4 to extract a vertical component.
This vertical component is transmitted to one end of the sample holder 2 to apply a load to the sample.
【０００３】[0003]
【発明が解決しようとする課題】従来の技術によれば、
不平衡振り子が一定の回転数で回転する場合、安定した
負荷を試料に与え続けることができるが、試験機の動作
開始直後は不平衡振り子の回転数が急激に上昇するた
め、過大な負荷を試料に与えることになる。これによっ
て、試料が破壊されるか、たとえ破壊されなくても不安
定な負荷を与えて、試験機の動作開始直後は試料の物性
値の変化を正確に測定することができないという問題点
があった。According to the prior art,
When the unbalanced pendulum rotates at a constant rotation speed, a stable load can be continuously applied to the sample.However, immediately after the operation of the test machine, the rotation speed of the unbalanced pendulum rises rapidly, so an excessive load is applied. Will be given to the sample. As a result, there is a problem that the sample is destroyed or an unstable load is applied even if it is not destroyed, so that a change in the physical property value of the sample cannot be accurately measured immediately after the operation of the tester is started. Was.
【０００４】本発明は前記のような問題点を解決するた
めになされたもので、その目的は試験機の動作開始直後
においても、急激に過大な負荷を試料に与えることなく
徐々に増加する負荷を試料に与えることにより、物性値
の変化を正確に測定することができる振動疲労試験機を
提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has an object to reduce a load that is gradually increased without immediately applying an excessive load to a sample even immediately after the start of operation of a tester. It is an object of the present invention to provide a vibration fatigue tester capable of accurately measuring a change in a physical property value by giving a sample a sample.
【０００５】[0005]
【課題を解決するための手段】本発明の振動疲労試験機
は不平衡振り子の回転子内に粘性物を封入することによ
り不平衡重量分の移動を緩和して、動作開始直後から急
激に過大な負荷を試料に与えることなく徐々に増加する
負荷を試料に与えて、物性値の変化を正確に測定するも
のである。The vibration fatigue tester of the present invention reduces the movement of the unbalanced weight by enclosing a viscous substance in the rotor of the unbalanced pendulum, and rapidly increases immediately after the operation starts. giving load gradually increases without giving Do load the sample into the sample, it is also <br/> of you accurately measure changes in physical properties.
【０００６】[0006]
【作用】不平衡振り子の回転子内に粘性物を封入するこ
とにより、従来の技術による振動疲労試験機においては
図５のように試験機の動作開始直後において急激に増大
する負荷が試料にかかっていたのに対し、図６のように
試験機の動作開始直後からゆっくり時間をかけて増加す
る負荷を試料に与えるようになる。By enclosing a viscous substance in the rotor of an unbalanced pendulum, a load that rapidly increases immediately after the operation of the testing machine is applied to the sample in the conventional vibration fatigue testing machine as shown in FIG. In contrast, as shown in FIG. 6, an increasing load is applied to the sample over a short period of time immediately after the start of the operation of the tester.
【０００７】[0007]
【実施例】図１は本発明における１実施例の構成図であ
り、図２は本発明の振動疲労試験機に用いる不平衡振り
子の構成図である。ここで、１は試料，２は試料ホルダ
ー，３は不平衡振り子，４は水平拘束ばね，５は荷重ば
ね，６はモーター，７は回転子，８は重り，９はピスト
ン，１０は粘性物である。振動疲労試験機は主に試料ホ
ルダー２と不平衡振り子３と水平拘束ばね４と荷重ばね
５とモーター６から構成されている。モーター６で不平
衡振り子３を回転させることにより振動を発生させて、
試料ホルダー２に装着した試料１に負荷を与えるしくみ
になっている。不平衡振り子３は主に回転子７と重り８
とピストン９と粘性物１０とから構成されている。円筒
型の回転子内にピストン９を内蔵して、粘性物１０が回
転子内壁とピストン９の間を介してピストン９の前後へ
回り込めるようになっている。ピストン９の一端に重り
８を取り付けた回転子７を回転させて遠心力で振動を発
生させ、その遠心力の水平方向の分力を水平拘束ばね４
で拘束して垂直方向の分力を取り出し、この垂直方向の
分力が試料ホルダー２の一端に伝わって試料に負荷を与
えるしくみになっている。試験機の動作開始前、ピスト
ン９は回転子７の最も内部方向に押し込んでおいて不平
衡振り子３を平衡の位置にする。試験機の動作開始直
後、不平衡振り子３の重量が均一でないため重り８とピ
ストン９は回転子７の回転に伴って遠心力で外部方向に
移動する。本発明の振動疲労試験機に用いる不平衡振り
子３は粘性物１０の粘性抵抗でピストン９の移動は緩慢
になり、試料１に与える負荷は従来の振動疲労試験機に
用いられている不平衡振り子３に比べて長い時間をかけ
て徐々に増加する。ピストン９が遠心力により円筒型の
回転子内を端部まで移動した後は、不平衡振り子３は一
定の負荷を試料に与え続ける。1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an unbalanced pendulum used in a vibration fatigue tester of the present invention. Here, 1 is a sample, 2 is a sample holder, 3 is an unbalanced pendulum, 4 is a horizontal restraining spring, 5 is a load spring, 6 is a motor, 7 is a rotor, 8 is a weight, 9 is a piston, and 10 is a viscous material. It is. The vibration fatigue tester mainly includes a sample holder 2, an unbalanced pendulum 3, a horizontal restraining spring 4, a load spring 5, and a motor 6. The vibration is generated by rotating the unbalanced pendulum 3 by the motor 6,
The load is applied to the sample 1 mounted on the sample holder 2. The unbalanced pendulum 3 is mainly composed of the rotor 7 and the weight 8
, A piston 9 and a viscous material 10. The piston 9 is built in the cylindrical rotor, and the viscous material 10
To the front and back of piston 9 through between trochanter inner wall and piston 9
You can go around. The rotor 7 having the weight 8 attached to one end of the piston 9 is rotated to generate vibration by centrifugal force, and the horizontal component of the centrifugal force is used as the horizontal restraining spring 4.
And a vertical component is taken out, and the vertical component is transmitted to one end of the sample holder 2 to apply a load to the sample. Prior to the start of the operation of the tester, the piston 9 is pushed in the most inward direction of the rotor 7 to bring the unbalanced pendulum 3 into a balanced position. Immediately after the start of the operation of the testing machine, the weight 8 and the piston 9 move outward due to centrifugal force with the rotation of the rotor 7 because the weight of the unbalanced pendulum 3 is not uniform. In the unbalanced pendulum 3 used in the vibration fatigue tester of the present invention, the movement of the piston 9 becomes slow due to the viscous resistance of the viscous material 10, and the load applied to the sample 1 is the unbalanced pendulum used in the conventional vibration fatigue tester. It gradually increases over a long period of time compared to 3. The piston 9 is cylindrical due to centrifugal force.
After moving to the end in the rotor, the unbalanced pendulum 3 continues to apply a constant load to the sample.
【０００８】[0008]
【発明の効果】以上のように、本発明によれば試験機の
動作開始直後から急激に過大な負荷を試料に与えること
なく徐々に増加する負荷を試料に与えるようになる。こ
れにより、試料が破壊されたり試料に不安定な負荷を与
えたりすることなく、物性値の変化を正確に測定するこ
とができるようになる。As described above, according to the present invention, a gradually increasing load is applied to the sample immediately after the start of the operation of the tester without suddenly applying an excessive load to the sample. This makes it possible to accurately measure the change in the physical property value without breaking the sample or applying an unstable load to the sample.
【図１】本発明における１実施例の構成図である。FIG. 1 is a configuration diagram of one embodiment of the present invention.
【図２】本発明における振動疲労試験機に用いる不平衡
振り子の構成図である。FIG. 2 is a configuration diagram of an unbalanced pendulum used in a vibration fatigue tester according to the present invention.
【図３】従来の技術による振動疲労試験機の構成図であ
る。FIG. 3 is a configuration diagram of a vibration fatigue tester according to a conventional technique.
【図４】従来の技術による振動疲労試験機に用いる不平
衡振り子の構成図である。FIG. 4 is a configuration diagram of an unbalanced pendulum used in a vibration fatigue tester according to a conventional technique.
【図５】従来の技術による振動疲労試験機が試料に与え
る負荷の値のグラフである。FIG. 5 is a graph of a value of a load applied to a sample by a conventional vibration fatigue tester.
【図６】本発明における振動疲労試験機が試料に与える
負荷の値のグラフである。FIG. 6 is a graph of a value of a load applied to a sample by a vibration fatigue tester according to the present invention.
１ 試料 ２ 試料ホルダー ３ 不平衡振り子 ４ 水平拘束ばね ５ 荷重ばね ６ モーター ７ 回転子 ８ 重り ９ ピストン １０ 粘性物 DESCRIPTION OF SYMBOLS 1 Sample 2 Sample holder 3 Unbalanced pendulum 4 Horizontal restraint spring 5 Load spring 6 Motor 7 Rotor 8 Weight 9 Piston 10 Viscous material
Claims (1)
不平衡振り子を備えた振動疲労試験機において、回転子
と重りとピストンとからなる不平衡振り子の回転子内に
粘性物を封入したことを特徴とする振動疲労試験機。1. To measure a change in a physical property value of a sample,
A vibration fatigue testing machine having an unbalanced pendulum, wherein a viscous substance is sealed in a rotor of the unbalanced pendulum including a rotor, a weight, and a piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14829393A JP3296627B2 (en) | 1993-05-28 | 1993-05-28 | Vibration fatigue testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14829393A JP3296627B2 (en) | 1993-05-28 | 1993-05-28 | Vibration fatigue testing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06337233A JPH06337233A (en) | 1994-12-06 |
| JP3296627B2 true JP3296627B2 (en) | 2002-07-02 |
Family
ID=15449541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14829393A Expired - Fee Related JP3296627B2 (en) | 1993-05-28 | 1993-05-28 | Vibration fatigue testing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3296627B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4807730B2 (en) * | 2005-08-25 | 2011-11-02 | 国立大学法人名古屋大学 | Bending fatigue testing machine and bending fatigue testing method |
| CN102680341B (en) * | 2012-05-24 | 2014-03-26 | 河海大学 | Loading device for concrete material crack growth test under dynamic load |
| CN102778396B (en) * | 2012-06-12 | 2014-03-26 | 河海大学 | Full-graduation concrete fracture expanding test testing machine under action of high water pressure and mobile load |
| WO2021206125A1 (en) | 2020-04-08 | 2021-10-14 | 学校法人福岡大学 | Repeated moment generation device |
-
1993
- 1993-05-28 JP JP14829393A patent/JP3296627B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06337233A (en) | 1994-12-06 |
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