JPS6113133A - Repeated load tester of elastic test piece - Google Patents
Repeated load tester of elastic test pieceInfo
- Publication number
- JPS6113133A JPS6113133A JP13325484A JP13325484A JPS6113133A JP S6113133 A JPS6113133 A JP S6113133A JP 13325484 A JP13325484 A JP 13325484A JP 13325484 A JP13325484 A JP 13325484A JP S6113133 A JPS6113133 A JP S6113133A
- Authority
- JP
- Japan
- Prior art keywords
- compression
- test piece
- elastic
- oilhydraulic
- pressure chamber
- 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.)
- Pending
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
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、弾性供試体の繰返し試験装置に係わり、更
に詳しくは弾性供試体に軸方向の変の負荷を低減させた
繰返し試験装置に関するも゛のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cyclic testing apparatus for elastic specimens, and more particularly to a cyclic testing apparatus in which the load of axial change on an elastic specimen is reduced.
従来、アクチュエータを使用して弾性供試体の繰返し試
験（圧縮，引張，剪断等）を行なう試験装置としては、
例えば第４図に示すように、固定側の弾性供試体取付は
台１と振動側の弾性供試体取付は台６に固定された油圧
アクチュエータ２に接続されたスライドプレート３ａと
を介して弾性供試体Ｗを取付け、前記油圧アクチュエー
タ２を油圧開回路４に設けた駆動モータ５の駆動により
、油圧ポンプ６を駆動じ、スライドプレート３ａの変位
を検知して、その信号によりサーボ弁７を制御して弾性
供試体Ｗに軸方向の変位を付与し、所定の試験を行なっ
ていた。Conventionally, test equipment that uses actuators to perform repeated tests (compression, tension, shear, etc.) on elastic specimens is as follows:
For example, as shown in FIG. 4, the elastic specimen on the fixed side is mounted on a stand 1, and the elastic specimen on the vibration side is mounted on a slide plate 3a connected to a hydraulic actuator 2 fixed to a stand 6. A hydraulic pump 6 is driven by a drive motor 5 with a sample W attached and the hydraulic actuator 2 provided in a hydraulic open circuit 4, and the displacement of the slide plate 3a is detected, and the servo valve 7 is controlled by the signal. A predetermined test was conducted by applying an axial displacement to the elastic specimen W using a flexure.
なお、図中８はリリーフバルブ、９はラインフィルタ、
１０はオイルクーラ、１１はオイルタンクを示している
。In addition, in the figure, 8 is a relief valve, 9 is a line filter,
Reference numeral 10 indicates an oil cooler, and reference numeral 11 indicates an oil tank.
しかしながら、このような従来の試験方法の得られるが
、反面油圧力を発生させるだめの駆動モータ５を常時全
負荷で運転させなければならず、省エネルギー上の観点
及び駆動モ＝り５の１ｌｉＩ］久性上問題があった。However, although such a conventional test method can be obtained, on the other hand, the drive motor 5, which generates hydraulic pressure, must be operated at full load at all times, which is disadvantageous from the viewpoint of energy saving and the drive motor 5. There was a problem with durability.
この発明は、かかる従来の問題点に着目して′４出され
たもので、その目的とするところは、弾性供試体の繰返
し試験を行なうに際し、弾性供試体の反力を有効に利用
して油圧ポンプを１駆動する、駆・１Φモータの口荷を
低減し、もって、駆動モータの大１Ｊな省エネルギーを
図ることかできるとともに、耐久性も向上することがで
きる弾性供試１本の繰返し試験装置を掟供するものであ
る。This invention was developed in 2004 by paying attention to such conventional problems, and its purpose is to effectively utilize the reaction force of an elastic specimen when repeatedly testing the elastic specimen. Repeated testing of one elastic specimen reduces the load on the drive/1Φ motor that drives the hydraulic pump, thereby saving a large 1J of energy in the drive motor, and improving durability. It provides equipment.
［、発明の！ｉｔｉ成］
この発明は、上記目的を達成するため固定側の弾性供試
１本伺は台と、油圧アクチュエータに連結された振動側
の弾性供試体取付は台との間に弾性供試体を爪側け、前
記油圧アクチュエータに」こり弾性供試体に軸方向の変
位を＋１１．Ｌｊするようにした弾性供試体の繰返し試
験装置において、前記油圧アクチュエータの伸び側圧力
室と縮み側圧力室とを結ぶ油圧閉回路を構成し、この油
圧閉回路中にレギュレータを備えだ両振式可変流量ポン
プを設けたことを要旨とするものである。[, of invention! In order to achieve the above-mentioned object, the present invention provides an elastic specimen between a stand for mounting an elastic specimen on a fixed side and a stand for mounting an elastic specimen on a vibrating side connected to a hydraulic actuator. On the side, the hydraulic actuator was subjected to an axial displacement of +11. In a repeating test device for an elastic specimen having Lj, a hydraulic closed circuit is configured to connect a pressure chamber on the extension side and a pressure chamber on the contraction side of the hydraulic actuator, and a regulator is provided in the hydraulic closed circuit. The gist is that a variable flow rate pump is provided.
以下、添附図面に基づいて、この発明の詳細な説明する
。Hereinafter, the present invention will be described in detail based on the accompanying drawings.
第１図において、１００は弾性供試体Ｗに圧縮変位を繰
返しイ」鳥するだめの試験装置本体を示し、２００は試
、験装置本体１００を、駆動するためのｌ山王アクチコ
−エータ、３００はアクチュエータ２００を作動するだ
めの油圧閉回路を示している。In FIG. 1, 100 indicates a test device main body that repeatedly applies compressive displacement to the elastic specimen W, 200 a Sanno actuator for driving the test device main body 100, and 300 a Sanno actuator for driving the test device main body 100. A closed hydraulic circuit for actuating actuator 200 is shown.
゛前記、試験装置本体１００は、固定側の弾性供試体取
付は台１１０と、上部支部プレート１２０とが所定の間
隔て複数本の支柱１６０により堅固に支持され、前記支
柱１３０には、油圧アクチコー工−タ２００、図のピス
ト／ロッド２１０の先端に連結された振動側の弾性供試
体取付は台１４０が摺動（り能に設けられている。゛The above-mentioned test device main body 100 has a stand 110 for mounting the elastic specimen on the fixed side, and an upper branch plate 120 that are firmly supported by a plurality of columns 160 at predetermined intervals, and the columns 130 are equipped with hydraulic actuators. A stand 140 is slidably mounted to mount an elastic specimen on the vibration side connected to the tip of the piston/rod 210 in the figure.
前記油圧アクチュエータ２００は、前記上部支（、ｊシ
レー１−１２０上に図示しないポルＩ・等により固定さ
れている。The hydraulic actuator 200 is fixed onto the upper support (1-120) by means of a pole (not shown) or the like.
１）１［記浦月アクヂュエータ２００の伸び側圧力室２
２０と、縮み側圧力室２３０とを結ぶ油圧閉回路３００
の途中にｄｌ、高圧大容量の両振式可変流惜ボ／）３１
０（以下流量ポンプ３１０と言う）と、この流−１（１
ボ／プロ１０を１駆動する駆動モータ６２０と流量ポン
プ６１０の流量及び吐出方向を制御する／こめのｌ／ギ
ュレータ６６０とが設けられている。1) 1 [Extension side pressure chamber 2 of Urazuki actuator 200]
20 and the contraction side pressure chamber 230.
In the middle of the dl, high pressure large capacity double swing type variable flow control valve/) 31
0 (hereinafter referred to as flow pump 310) and this flow -1 (1
A drive motor 620 that drives the pump 10 and a regulator 660 that controls the flow rate and discharge direction of the flow pump 610 are provided.
なお、前記レギュレータ６６０の制御についてに４１、
傷゛に限定しないか、例えば弾性供試体Ｗの圧縮変位に
応じて流計ポンプ６１０の傾転角を制句１１４−ること
により、ポツプの吐出量及び吐出方向を制ｆ１１ｉｌす
る方法をとり得る。Regarding the control of the regulator 660, 41,
Alternatively, for example, by controlling the tilt angle of the flowmeter pump 610 according to the compressive displacement of the elastic specimen W, it is possible to control the discharge amount and direction of the pop. .
次に、前記油圧閉回路３００の付帯配管について涜明す
る。Next, the incidental piping of the hydraulic closed circuit 300 will be explained in detail.
このｐｌ、 、ｊＢ配管は、油圧閉回路が完全閉回路だ
と、回路内の７１１１の温度が上昇し、油自身及び機器
にも悪影響を及ぼす恐れがあるために設けられたもので
、以下のように構成される。This pl, , jB piping was installed because if the hydraulic closed circuit was completely closed, the temperature of 7111 in the circuit would rise, which could have a negative effect on the oil itself and the equipment. It is configured as follows.
前記油圧閉回路３００には、オイルタンク６４０に接続
するオイル供給回路３５０と、オイル排出回路６６０と
、リリーフ回路６９０及（Ｊ’３９１とが夫々設けられ
ている。The hydraulic closed circuit 300 is provided with an oil supply circuit 350 connected to the oil tank 640, an oil discharge circuit 660, and relief circuits 690 and (J'391), respectively.
前記オイル供給回路６５０には、オイルタンク６４０側
から低圧小容量ボ／グ６５１、このポンプ６５１を、駆
動する低出力モータロ５２と、逆止弁６５６とが設けら
れ、このオイル供給回路６５０とオイル排出回路６６０
とを結ぶ管路３８０には、リリーフ弁６５４か設けられ
ている。The oil supply circuit 650 is provided with a low-pressure small-capacity pump 651 from the oil tank 640 side, a low-output motor 52 that drives the pump 651, and a check valve 656. Exhaust circuit 660
A relief valve 654 is provided in the conduit 380 connecting the two.
１だ、オイル排出回路６６０には、方向制御弁６６１、
絞り弁６６２（寸だはりリーフ弁）、ラインフィルタ６
６６、オイルクーラ６６４が夫々設けられ、油圧アクチ
ュエータ２００からの戻りの油を一部オイルタンク６４
０へ戻すように構成されている。1, the oil discharge circuit 660 includes a directional control valve 661,
Throttle valve 662 (small leaf valve), line filter 6
66 and an oil cooler 664 are provided, and some of the oil returned from the hydraulic actuator 200 is stored in the oil tank 64.
It is configured to return to 0.
また、油圧閉回路３００とオイル排出回路３６０とを結
ぶリリーフ回路６９１と、前記オイルタ／り３４０に接
続するＩＪ ＩＪ−７回路６９０には、夫々リリーフ弁
３９５ａ 、 ３９５１）と、圧力計３９６８ 、３９
６ｂが設けられている。Further, a relief circuit 691 connecting the hydraulic closed circuit 300 and the oil discharge circuit 360 and an IJ-7 circuit 690 connected to the oil tank 340 are provided with relief valves 395a, 3951) and pressure gauges 3968, 39, respectively.
6b is provided.
以上のように付帯配管を設けることによって、油圧閉回
路３００内の油温の異常上昇を有効に防止している。By providing the incidental piping as described above, an abnormal rise in oil temperature within the hydraulic closed circuit 300 is effectively prevented.
また、前記低圧小容量ポンプ３５１は、低出力モータ３
５２により常時運転され、それから吐出される油は、Ｉ
Ｊ ＩＪ−フ弁６５４により常に調圧されている。従っ
て、前記方向制御弁３６１、絞り弁３６２を介してオイ
ルタンク６４０へ戻ってこの油に見合う量だけ、逆上弁
３５３を介して油圧閉回路３００内へ供給されるように
なっている。Furthermore, the low-pressure small-capacity pump 351 is connected to the low-power motor 3
52, and the oil discharged from it is
The pressure is constantly regulated by the JIJ-F valve 654. Therefore, the amount of oil returned to the oil tank 640 via the directional control valve 361 and the throttle valve 362 is supplied into the hydraulic closed circuit 300 via the reversal valve 353.
次に、作用について説明する。Next, the effect will be explained.
第２図（ａｌ〜（ｅｌは、圧縮変位をサイン波形（第３
図でＸ）制御する場合の弾性供試体Ｗの変位状態と流量
ポンプ３１０の傾転角及び方向との関係を示す説明図で
ある。Figure 2 (al~(el is a sine waveform (third
FIG. 3 is an explanatory diagram showing the relationship between the displacement state of the elastic specimen W and the tilt angle and direction of the flow pump 310 when controlling (X) in the figure.
先ず、弾性供試（＊Ｗに圧縮変位を付与する工程におい
ては、レギュレータ３６０により流量ポンプ６１０の斜
軸又は斜板の傾転方向を油がａの方向に流れるように傾
向ける。First, in the step of applying a compressive displacement to the elastic test (*W), the regulator 360 tends the tilting direction of the slanted shaft or swash plate of the flow pump 610 so that the oil flows in the direction a.
このようにすることによって、圧油１ｉ？油圧アクチユ
エータ２００の伸び側圧力室２２０に供給されると同時
に、油圧アクチュエータ２００の縮み側圧力室２６０の
油は、流量ポンプ６１０に戻る。By doing this, pressure oil 1i? At the same time as being supplied to the extension side pressure chamber 220 of the hydraulic actuator 200, the oil in the contraction side pressure chamber 260 of the hydraulic actuator 200 returns to the flow pump 610.
これにより、弾性供試体Ｗは圧縮されるが、この工程に
おいては、駆動モータ３２０は全負荷運転される（第２
図（ａｌ 、 （ｂｌ 、 （Ｃ１参照）。As a result, the elastic specimen W is compressed, but in this step, the drive motor 320 is operated at full load (second
Figure (al, (bl, (see C1)).
次に、弾性供試体Ｗに所定の最大圧縮変位がかかった位
置（第２図の（Ｃ））において、流量ポンプ６１０の傾
転角をＯｏ、即ち、流量ポンプ６１０からの油の吐出が
零になるようレギュレータ３３０を制御する。続いて最
大圧縮状態から零圧縮に戻す工程に移行するわけである
が、ここで重要なのが弾性供試体Ｗとして弾性体を使用
しているという点である。即ち変形された弾性供試体Ｗ
には常に原状に復帰しようとする復元力、本実施例にお
いては圧縮に対する圧縮反力が作用しているということ
である。Next, at a position where a predetermined maximum compression displacement is applied to the elastic specimen W ((C) in FIG. 2), the tilt angle of the flow pump 610 is set to Oo, that is, the oil discharge from the flow pump 610 is zero. The regulator 330 is controlled so that Next, the process moves from the maximum compression state to zero compression, and what is important here is that an elastic body is used as the elastic specimen W. That is, the deformed elastic specimen W
This means that a restoring force that always tries to return to its original state, in this example a compression reaction force against compression, is acting on it.
次にこの工程につき説明する（第２図ＦＣ＋ 、 （ｄ
） 。Next, this process will be explained (Fig. 2 FC+, (d
).
（ｅ）参照）。(see (e)).
弾性供試体Ｗが最大圧縮された位置において、流量ポン
プ３１０の傾転角はＯｏに調節され、引き続き流量ポン
プ６１０の傾転方向は圧縮時とは反対方向のｂ方向に油
が流れるようレギュレータ６６０により制御される。こ
の時の油の動きであるが、弾性供給体Ｗの圧縮反力によ
り油圧アクチュエータ２００の伸び側圧力室２２０の油
が流量′ポンプ３１０に押し戻され、この油の力で流量
ポンプ６１０を廻し、その吐出側の油は油圧アクチュエ
ータ２００の縮み側圧力室２３０に導びかれる。At the position where the elastic specimen W is compressed to the maximum, the tilting angle of the flow pump 310 is adjusted to Oo, and the tilting direction of the flow pump 610 is then adjusted by the regulator 660 so that the oil flows in the b direction, which is the opposite direction to that during compression. controlled by Regarding the movement of oil at this time, the oil in the extension side pressure chamber 220 of the hydraulic actuator 200 is pushed back to the flow rate pump 310 by the compression reaction force of the elastic supply body W, and the force of this oil rotates the flow rate pump 610. The oil on the discharge side is led to the contraction side pressure chamber 230 of the hydraulic actuator 200.
即ちこの工程においては、圧縮反力の作用にて流量ポン
プ６１０が油圧モーター化し、更にはこれにより駆動モ
ーター３２０が発電機化する。このような構成となって
いるだめ、試験サイクルの半分は弾性供試体Ｗ自身の反
力が油圧の駆動源となるため、大巾な省エネルギーが可
能となる。That is, in this step, the flow pump 610 is converted into a hydraulic motor by the action of the compression reaction force, and furthermore, the drive motor 320 is thereby converted into a generator. With this configuration, the reaction force of the elastic specimen W itself serves as the hydraulic drive source for half of the test cycle, making it possible to significantly save energy.
との発明は、上記のように固定側の弾性体取付は台と、
油圧アクチュエータに連結された振動側の弾性体取付は
台との間に弾性体を増刊け、前記油圧アクチュエータに
より弾性体に軸方向の変位を付与するようにした弾性体
の繰返し試験装置において、前記油圧アクチュエータの
伸び側圧力室と縮み側圧力室とを結ぶ油圧閉回路を構成
し、この油圧閉回路中にレギュレータを備えた両振式可
変流量ポンプを設けたため、弾性供試体の繰返し試験を
行なうに際し、弾性供試体の反力を有効に利用して油圧
ポンプを駆動する駆動モータの負荷を低減し、これによ
り、駆動モータの大巾な省エネルギーを図ることができ
るとともに、耐久性も向上することができる効果がある
。In the invention, as mentioned above, the elastic body on the fixed side is mounted on a stand,
In the cyclic testing apparatus for an elastic body, the elastic body is mounted on the vibration side connected to the hydraulic actuator, and an elastic body is added between the vibration side and the stand, and the hydraulic actuator applies displacement in the axial direction to the elastic body. A hydraulic closed circuit was constructed that connects the extension side pressure chamber and the contraction side pressure chamber of the hydraulic actuator, and a double-oscillating variable flow rate pump with a regulator was installed in this hydraulic closed circuit, allowing for repeated tests on elastic specimens. In this case, the load on the drive motor that drives the hydraulic pump can be reduced by effectively utilizing the reaction force of the elastic specimen, thereby making it possible to achieve significant energy savings for the drive motor and improving its durability. It has the effect of
第１図は、この発明を実施した試験装置の正面図、第２
図（ａｌ〜第２図（ｅ）の各図は、圧縮変位をサイン波
形制御する場合の弾性供試体の変位状態と流量ポンプの
傾転角及び方向との関係を示ず説明図、第３図は第２図
のザイン゛カーブを示す説明図、第４図は従来の試験装
置の正面図である。
１１０・・・弾性供試体取付は台（固定側）、１４０・
・・弾性供試体取付は台（振動側）、２００・油圧アク
チュエータ、２２０・・・伸び側圧力室、２３０・・・
縮み側圧力室、３００・・・圧力閉回路、６１０・・・
両振式可変流量ポンプ、６６０・・・レギュレータ。Figure 1 is a front view of a test device implementing this invention, Figure 2 is
Figures (al to 2e) do not show the relationship between the displacement state of the elastic specimen and the tilt angle and direction of the flow pump when the compression displacement is controlled in a sine waveform. The figure is an explanatory diagram showing the sine curve of Fig. 2, and Fig. 4 is a front view of the conventional test equipment.
...The elastic specimen is mounted on the stand (vibration side), 200, hydraulic actuator, 220... extension side pressure chamber, 230...
Contraction side pressure chamber, 300...pressure closed circuit, 610...
Double swing type variable flow pump, 660...regulator.
Claims (1)
タ２００に連結された振動側の弾性供試体取付け台１４
０との間に弾性供試体Ｗを取付け、前記油圧アクチユエ
ータにより弾性供試体に軸方向の変位を付与するように
した弾性供試体の繰返し試験装置において、前記油圧ア
クチユエータの伸び側圧力室２００と縮み側圧力室２３
０とを結ぶ油圧閉回路３００を構成し、この油圧閉回路
中にレギユレータ３３０を備えた両振式可変流量ポンプ
３１０を設けたことを特徴とする弾性供試体の繰返し試
験装置。An elastic specimen mounting base 110 on the fixed side and an elastic specimen mounting base 14 on the vibration side connected to the hydraulic actuator 200.
0, an elastic specimen W is attached between the elastic specimen W and the hydraulic actuator to apply an axial displacement to the elastic specimen. Side pressure chamber 23
1. A repeat testing device for an elastic specimen, comprising a hydraulic closed circuit 300 connected to 0 and a double-oscillating variable flow rate pump 310 equipped with a regulator 330 in the hydraulic closed circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13325484A JPS6113133A (en) | 1984-06-29 | 1984-06-29 | Repeated load tester of elastic test piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13325484A JPS6113133A (en) | 1984-06-29 | 1984-06-29 | Repeated load tester of elastic test piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6113133A true JPS6113133A (en) | 1986-01-21 |
Family
ID=15100310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13325484A Pending JPS6113133A (en) | 1984-06-29 | 1984-06-29 | Repeated load tester of elastic test piece |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6113133A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5708224A (en) * | 1996-03-22 | 1998-01-13 | Mitsubishi Semiconductor America, Inc. | Method and apparatus for testing resin to determine age |
| KR100387978B1 (en) * | 2001-04-26 | 2003-06-18 | 한국기계연구원 | Rubber compression tester |
| KR100500740B1 (en) * | 1997-03-05 | 2005-10-25 | 요코하마 고무 가부시키가이샤 | Method for measuring the loadability of sealing materials and measuring device |
| DE102014116770B3 (en) * | 2014-11-17 | 2016-04-07 | Industrieanlagen- Betriebsgesellschaft mit beschränkter Haftung | Test bench and method for testing resilient elements |
| EP3514378A1 (en) | 2018-01-19 | 2019-07-24 | Artemis Intelligent Power Limited | Displacement of an object with hydraulic actuators |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5575634A (en) * | 1978-12-04 | 1980-06-07 | Hitachi Ltd | Running control unit for vibration test machine |
-
1984
- 1984-06-29 JP JP13325484A patent/JPS6113133A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5575634A (en) * | 1978-12-04 | 1980-06-07 | Hitachi Ltd | Running control unit for vibration test machine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5708224A (en) * | 1996-03-22 | 1998-01-13 | Mitsubishi Semiconductor America, Inc. | Method and apparatus for testing resin to determine age |
| KR100500740B1 (en) * | 1997-03-05 | 2005-10-25 | 요코하마 고무 가부시키가이샤 | Method for measuring the loadability of sealing materials and measuring device |
| KR100387978B1 (en) * | 2001-04-26 | 2003-06-18 | 한국기계연구원 | Rubber compression tester |
| DE102014116770B3 (en) * | 2014-11-17 | 2016-04-07 | Industrieanlagen- Betriebsgesellschaft mit beschränkter Haftung | Test bench and method for testing resilient elements |
| EP3514378A1 (en) | 2018-01-19 | 2019-07-24 | Artemis Intelligent Power Limited | Displacement of an object with hydraulic actuators |
| US11137330B2 (en) | 2018-01-19 | 2021-10-05 | Artemis Intelligent Power Limited | Displacement of an object with hydraulic actuators |
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