JPS6088348A - Material fatigue tester - Google Patents
Material fatigue testerInfo
- Publication number
- JPS6088348A JPS6088348A JP19516683A JP19516683A JPS6088348A JP S6088348 A JPS6088348 A JP S6088348A JP 19516683 A JP19516683 A JP 19516683A JP 19516683 A JP19516683 A JP 19516683A JP S6088348 A JPS6088348 A JP S6088348A
- Authority
- JP
- Japan
- Prior art keywords
- load
- chuck
- detector
- test piece
- material fatigue
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
Abstract
Description
【発明の詳細な説明】
この発明は材料の疲労強さを測定する材料疲労試験機に
係り、特に試験片に加えられているイ；ｉ屯を＋ｌＥ確
に４１）１定できる材料疲労試験機に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a material fatigue testing machine for measuring the fatigue strength of a material, and in particular to a material fatigue testing machine that can accurately determine +lE ton added to a test piece. Regarding.
か、従来この材料疲労試験機としては、第１図に、Ｊ（
すようなものが使用されている。この材料疲労試験機は
、試験片１０両側を第１のチャ・ンク２及び第２のチャ
ック３で把持し、第１のナヤック２と試験機本体６との
間に荷重負４：：■機構としてザーポブｆ４で制御され
試験月に予め疋められた荷重を加える油圧アクチュエー
タ５を設けて試験片ｌの疲労試験を行なう 力、第２の
チャンク３と試験機本体６との間に向上検出器７として
ロードセルを設は試験月１に加えられる荷重を電気４ｆ
ｔ号として検出してサーボ弁４に端子８から人力される
駆動信号と共にフィードバックして油圧アクチュエータ
５を制御駆動するものである。なお、図中９はＱ ＝Ｔ
ｊ イ、ｉ号アンプ、１０はサーボアンプ、１１は油圧
ポンプユニ。As for this conventional material fatigue testing machine, as shown in Fig. 1, J(
Something like this is used. This material fatigue testing machine grips both sides of a test piece 10 with a first chuck 2 and a second chuck 3, and applies a load between the first chuck 2 and the testing machine body 6. A fatigue test is carried out on the specimen l by providing a hydraulic actuator 5 which is controlled by the Zapob F4 and applies a predetermined load to the test force, and an increase detector is installed between the second chunk 3 and the testing machine body 6. The load cell is set up as 7 and the load applied in test month 1 is electrically 4f.
t is detected and fed back to the servo valve 4 together with a drive signal manually applied from the terminal 8 to control and drive the hydraulic actuator 5. In addition, 9 in the figure is Q = T
j A, I amplifier, 10 is a servo amplifier, and 11 is a hydraulic pump unit.
１・、１２は防振装置を示す。1., 12 indicate vibration isolating devices.
しかしなから、この種の従来の材木二）疲労試験３４合
かあった。However, this type of conventional lumber has only 34 fatigue tests.
これは、この材料試験機の振動系は、第２図−に小すよ
うにモデル化した場合において、試験片に加えられる４
Ｊ ｉｌをＦ＝ Ｆｏ ｓｉｎ ｗｔとすると、連〃」
方程式は、
ｍｔχ１＋ Ｋ ＋ （χ、 −Ｘ２）＝ Ｆｏ ｓｉ
ｎ ｗｔ −（＋）ｍ２４＋に、（Ｘ２− ｘ、）＋
Ｋ２（Ｘ２− Ｘ３ ）＝０・（２）Ｉｎ３ｘＪ３＋
Ｋ２（Ｘ３ Ｘ２ ）＝ −Ｆｏ Ｓｉｎ ｗｔ ”’
（３）となる・ここで、ｍｌｌｌ１１は夫々油圧アク
チュ１’ ２’ ３
エータのピストンと第１のチャック、第２のチャンクと
荷重検出器のＯｆ動部、試験機本体と油圧アクチュエー
タ本体の質！ｉ髪を、χ１．Ｘ２．χ３はｍｍｍのｔ心
の変位を、Ｋ ｌ、 Ｋ ２は試験片、１’ ２’ ３
（；１ｆ動検出器のへネ定数を示す。This means that the vibration system of this material testing machine is modeled as shown in Figure 2.
If J il is F = Fo sin wt, then
The equation is mtχ1+ K + (χ, −X2)= Fo si
n wt −(+)m24+, (X2− x,)+
K2(X2-X3)=0・(2)In3xJ3+
K2(X3X2)=-Fo Sin wt "'
(3) Here, mlll11 is the quality of the hydraulic actuator 1'2' 3, the piston of the eater, the first chuck, the second chunk, the moving parts of the load detector, the testing machine main body, and the hydraulic actuator main body. ! i hair, χ1. X2. χ3 is the displacement of the t-center in mm, Kl and K2 are the test piece, and 1'2' 3 (; 1f indicates the Hene constant of the motion detector.
ここで、試験片に加えられている力は、Ｆ、″に、（χ
１−Ｘ２） ・・・（４）と表わされ、また荷重検出器
に加わる力は。Here, the force applied to the specimen is F,″ (χ
1-X2)...(4), and the force applied to the load detector is.
Ｆ２・Ｋ２（ｘ、、 −Ｘ３） ・・・（５）となり、
（４）、（５）式を」二記（２）式に代入するとＦ １
Ｆ２＝ Ｊ Ｘ２ ”’ （６）どなり、試験片１に加
わった力と荷重検出器７に加わった力とは異なっており
、荷重検出器７で検出される値は試験片１に加わる力の
（＋７ｉとは異なることとなる。F2・K2(x,, -X3) ...(5),
Substituting equations (4) and (5) into equation (2), F 1
F2= J (This is different from +7i.
この発明は以−Ｌの不具合に鑑みなされたものであって
、試験片に加えられた力を正確に検出することができる
材料疲労試験機を提供することを目的とする。The present invention was made in view of the above problems, and an object of the present invention is to provide a material fatigue testing machine that can accurately detect the force applied to a test piece.
そしてこの目的は、試験片の両側を２つのチャックで把
持して、一方のチャンクに荷重検出器を設け、他方のチ
ャンクに荷重負荷機構を設け、上記試験片に繰り返し荷
重を加えるようにした材＊１疲労試験機の荷重検出器側
のチャックに加速度検出機構を設け、この検出値に基づ
いて」−記荷重検出器で検出した前型の伯を補＋ｌニす
るようにした材料疲労試験機で達成される。The purpose was to grasp the test piece with two chucks on both sides, provide a load detector on one chunk, and provide a load loading mechanism on the other chunk to repeatedly apply a load to the test piece. *1 A material fatigue testing machine that is equipped with an acceleration detection mechanism on the chuck on the load detector side of the fatigue testing machine, and based on this detected value, complements the value of the previous model detected by the load detector. is achieved.
次に本発明の実施例を図面に基ついて詳細に説明する。Next, embodiments of the present invention will be described in detail with reference to the drawings.
本実施例に係る材料疲労試験機の機構は前述した従来の
材料疲労試験機と略同−・である。即ち試験片の両側を
第１及び第２のチャック２，３で把持し、この第１のチ
ャック２と試験機本体６との間に荷重負荷機構としてサ
ーボ弁４で制御される油圧アクチュエータ５を設けて試
験片ｌの疲労試験を行なう一方、第２のチャック３と試
験機本体６との間に荷重検出器７としてロードセルを設
は荷重を電気信号として検出する。また第２のチャック
３には加速度検出機構として加速度訓１３を設けて、第
２のチャック３とイ：：ｊ ｉｎ検出器７のＵ（動部分
の加速度へを検出するようにしている。この検出された
信号は演ｑ器１４に入力され、前爪信号アンプ９を経た
荷重検出器７の信りと」（に補正演η器１５加え、この
出力を、駆動信号と共にサーボアンプｌＯに人力してサ
ーボ弁４を制御するものである。The mechanism of the material fatigue testing machine according to this embodiment is approximately the same as the conventional material fatigue testing machine described above. That is, both sides of the test piece are gripped by first and second chucks 2 and 3, and a hydraulic actuator 5 controlled by a servo valve 4 is installed between the first chuck 2 and the testing machine body 6 as a load applying mechanism. A load cell is installed as a load detector 7 between the second chuck 3 and the testing machine main body 6 to detect the load as an electrical signal. Further, the second chuck 3 is provided with an acceleration sensor 13 as an acceleration detection mechanism to detect the acceleration of the moving part of the second chuck 3 and the U of the detector 7. The detected signal is input to the q operator 14, and the output of the load detector 7 which has passed through the front claw signal amplifier 9 is added to the correction operator 15, and this output is input to the servo amplifier lO manually with the drive signal. This is to control the servo valve 4.
次に本実施例に係る材料疲労試験機の作用について説明
する。Next, the operation of the material fatigue testing machine according to this embodiment will be explained.
材料疲タコ試験機か作動を開始すると、試験片るように
、油圧アクチュエータ５かサーボＲ４に１１制御されて
作動する。ここで９−ホｊｒに現在加えられている荷重
の真の値Ｆ１をフィードバックして油圧アクチュエータ
５に所定の作動を行なわせるものであるが、本実施例に
おいては、この真の荷重のイ直としてイ：：ｒ屯検出器
７が１１１１１定した荷重の値Ｆ２に、第２のチャンク
３及びイコ屯検出器７のｕｆ動部分の質ｉ、を刊２とこ
の第２のチャックに設けた加速度６１で測定したこれら
の加速度の値αの積即ちｍ２αのイ〆Ｉを加えた（ｔｊ
を用いるようにしている。これは、１．述のように試験
片に加えられている荷重の真の値をＦｌ、第２チヤンク
及び荷重検出器のＩ可動部分の質ｌｉｔをｍ２及びこれ
らの加速度を勺とすると
Ｆｌ−Ｆ２＝ ”２Ｘ２
の式か成☆：Ｌ、Ｆｌは、
Ｆ −Ｆ ＋ｍ Ｘ 二Ｆ２ ＋ ｍ２α２２
ｍ２αの稙は加速度、１ｉ１３に接続された演算器１４
で１つ出されるものであるか、上記第２のチャック３及
び荷重検出器７のｕ１動部分の質量ｍ２は予め１１１１
足してこの演ｑ器１４に設定されており、この演ｑ器か
らの信号ｍ２αが荷重信号アンプ８を経た６：ｉ屯Ａｌ
ｌ定値Ｆ２と共に補正演算器１５に人力される。この補
１１：演算器１５からは、試験片に加えられている４１
Ｋｉの真の値Ｆ、に基づいて所要の補１１： ４Ｊ’
ｙか出力されて駆動信号と共にサーボアンプを経てサー
ボ弁４に加えられ、油圧アクチュエータ５を制御して予
め定めた値例えばＦ＝ Ｆｏ ｓｉｎ ｗｔの荷重を試
験片に加えるものであるー
なお、本実施例においては、加速度検出機構として加速
度ル１を用いたか他の機構、例えば速度や変位を測定し
てこの伯から加速度を測定するものであってもよい。When the material fatigue tacho testing machine starts operating, it operates under the control of hydraulic actuator 5 or servo R4 11 so as to test the test piece. Here, the true value F1 of the load currently applied to 9-HJR is fed back to cause the hydraulic actuator 5 to perform a predetermined operation. As a::r ton detector 7 has a fixed load value F2 of 11111, the quality i of the uf moving part of the second chunk 3 and the ut detector 7 is provided in the second chuck and this second chuck. The product of these acceleration values α measured at acceleration 61, i.e., m2α, is added (tj
I try to use This is 1. As mentioned above, if the true value of the load applied to the test piece is Fl, the quality of the I movable parts of the second chain and load detector is m2, and the acceleration of these is E, then Fl-F2 = 2X2. Formation of the formula ☆: L, Fl are F - F + m
The mass m2 of the moving part u1 of the second chuck 3 and the load detector 7 is 1111 in advance.
The signal m2α from this q operator is added to the 6:i tun Al
It is manually input to the correction calculator 15 together with the constant value F2. Complement 11: From the calculator 15, the 41
Based on the true value of Ki, F, the required complement 11: 4J'
y is output and applied along with a drive signal to the servo valve 4 via the servo amplifier, which controls the hydraulic actuator 5 to apply a predetermined load, such as F = Fo sin wt, to the test piece. In the embodiment, the acceleration sensor 1 may be used as the acceleration detection mechanism, or another mechanism may be used, for example, one that measures velocity or displacement and measures the acceleration from this angle.
以１−説明したように本発明に係る材料疲労試験機は、
’ｉｓ ２のチャック及び荷重検出器のＵ（動部分の、
質；１１と加速度の伯を演ｑ器で掛ｎし、１＋：ｉ ｉ
ｎ検出器で検出した荷重のイ〆１を補正演Ｉして駆動信
号にフィードバックをかけられるから、試験片に予め設
定した荷重を止しく負荷出来るという効果を奏するもの
である。1- As explained above, the material fatigue testing machine according to the present invention has the following features:
'is 2 chuck and load detector U (moving part,
Quality: Multiply 11 by the ratio of acceleration using a q operator, 1+:i i
Since the load detected by the n detector can be corrected and fed back to the drive signal, it is possible to precisely apply a preset load to the test piece.
第１図は従来の材料疲労試験機をｉｆ＜す説明図、第２
図は材料疲労試験機の振動系を示すモデル図、第３図は
本発明の実施例に係る材料疲タコ試験機を示す説明図で
ある。
１・・・試験片
２．３・・・チャンク
４・・・サーホブｆ
５・・・荷重０加機構 （油圧アクチュエータ）７・・
・４’＋ｉｆ東検出器 （ロードセル）１３・・・加速
度検出機構 （加速度計）特設出願人 株式会社明石製
作所
代 理 人 ノＣ理十 主橋 皓・１旨： （Figure 1 is an explanatory diagram of a conventional material fatigue tester;
The figure is a model diagram showing a vibration system of a material fatigue testing machine, and FIG. 3 is an explanatory diagram showing a material fatigue tacho testing machine according to an embodiment of the present invention. 1... Test piece 2.3... Chunk 4... Surhob f 5... Zero load applying mechanism (hydraulic actuator) 7...
・4'+if east detector (load cell) 13... Acceleration detection mechanism (accelerometer) Special applicant Akashi Seisakusho Co., Ltd. Agent No.C. Riju Main Bridge 1.
Claims (1)
力のチャンクに荷重検出器を設け、他方のチャックにイ
：η屯負荷機構を設け、上記試験片に繰り返し４；ＩＩ
Ｔｒを加えるようにした材料疲労試験機において、Ｉ−
記荷重検出器側のチャックに加速度検出機構を設けこの
検出値に基づいて上記向上検出器で検出した荷重の値を
補正する。ようにしたことを特徴とする材料疲労試験機
。Grip the 1st and 1st sides of the test piece with two chunks and hold it at −°
A load detector is provided on the force chuck, and a load mechanism is provided on the other chuck, and the above specimen is repeatedly subjected to 4;
In a material fatigue tester that adds Tr, I-
An acceleration detection mechanism is provided on the chuck on the side of the load detector, and based on this detection value, the value of the load detected by the improvement detector is corrected. A material fatigue testing machine characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19516683A JPS6088348A (en) | 1983-10-20 | 1983-10-20 | Material fatigue tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19516683A JPS6088348A (en) | 1983-10-20 | 1983-10-20 | Material fatigue tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6088348A true JPS6088348A (en) | 1985-05-18 |
| JPH0154651B2 JPH0154651B2 (en) | 1989-11-20 |
Family
ID=16336526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19516683A Granted JPS6088348A (en) | 1983-10-20 | 1983-10-20 | Material fatigue tester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6088348A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0213824A (en) * | 1988-06-30 | 1990-01-18 | Shimadzu Corp | Load corrector for material testing machine |
| JP2008164495A (en) * | 2006-12-28 | 2008-07-17 | Japan Aerospace Exploration Agency | Method for measuring multi-component force, and device thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20131669A1 (en) * | 2013-10-09 | 2015-04-10 | Freni Brembo Spa | DEVICE AND METHOD OF CHARACTERIZATION OF THE ELASTIC PROPERTIES OF A FRICTION MATERIAL |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5146428A (en) * | 1974-10-18 | 1976-04-20 | Diamond Electric Mfg | NENSHOSEIGYO SOCHI |
-
1983
- 1983-10-20 JP JP19516683A patent/JPS6088348A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5146428A (en) * | 1974-10-18 | 1976-04-20 | Diamond Electric Mfg | NENSHOSEIGYO SOCHI |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0213824A (en) * | 1988-06-30 | 1990-01-18 | Shimadzu Corp | Load corrector for material testing machine |
| JP2008164495A (en) * | 2006-12-28 | 2008-07-17 | Japan Aerospace Exploration Agency | Method for measuring multi-component force, and device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0154651B2 (en) | 1989-11-20 |
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