JPS5830532B2 - Cryogenic impact test method and testing machine - Google Patents

Cryogenic impact test method and testing machine

Info

Publication number
JPS5830532B2
JPS5830532B2 JP18913980A JP18913980A JPS5830532B2 JP S5830532 B2 JPS5830532 B2 JP S5830532B2 JP 18913980 A JP18913980 A JP 18913980A JP 18913980 A JP18913980 A JP 18913980A JP S5830532 B2 JPS5830532 B2 JP S5830532B2
Authority
JP
Japan
Prior art keywords
test
impact
test piece
hammer
liquefied gas
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
Application number
JP18913980A
Other languages
Japanese (ja)
Other versions
JPS57110937A (en
Inventor
典秀 細田
泰郎 倉岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hokusan Co Ltd
Original Assignee
Hokusan Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hokusan Co Ltd filed Critical Hokusan Co Ltd
Priority to JP18913980A priority Critical patent/JPS5830532B2/en
Priority to US06/334,320 priority patent/US4405243A/en
Publication of JPS57110937A publication Critical patent/JPS57110937A/en
Publication of JPS5830532B2 publication Critical patent/JPS5830532B2/en
Expired legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/30Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003Generation of the force
    • G01N2203/0032Generation of the force using mechanical means
    • G01N2203/0039Hammer or pendulum
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/022Environment of the test
    • G01N2203/0222Temperature
    • G01N2203/0228Low temperature; Cooling 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)

Description

【発明の詳細な説明】 本発明は極低温下で試験材料のねばり強さを測定する為
のシャルピー若しくは落錘による衝撃試験方法及びその
方法の実施に用いられる試験機に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a Charpy or falling weight impact test method for measuring the tenacity of test materials at cryogenic temperatures, and a testing machine used to carry out the method.

従来、上述試験方法としては、低温に冷却保持された液
化ガス(例えばアルコール、フレオン等)に試験片を浸
し、一定時間キープした後、素早く試験片を取出し、こ
れを試験機にセットし、試験を行なう方法と、試1験片
を発泡スチロールや紙等の断熱材で形成した箱で囲み、
この箱ごと試験機にセットしたま\、液体ヘリウム等の
低温液化ガスを注ぎ込み、この状態で試験を行なう方法
が知られている。
Conventionally, the above-mentioned test method involves immersing a test piece in a liquefied gas (e.g. alcohol, Freon, etc.) that is cooled and maintained at a low temperature, holding it for a certain period of time, then quickly taking out the test piece, setting it in a testing machine, and conducting the test. The first method is to surround the test piece with a box made of heat insulating material such as styrofoam or paper.
A known method is to place the entire box in a testing machine, pour low-temperature liquefied gas such as liquid helium into it, and then perform the test in this state.

しかし、一般的に低温になると、物質の比熱は小さくな
り、特に低温液化程度まで温度が降下すると、比熱は極
端に小さくなる。
However, the specific heat of a substance generally decreases as the temperature decreases, and particularly when the temperature drops to the level of low-temperature liquefaction, the specific heat decreases extremely.

このため例えば、A1合金の試験片では、液体ヘリウム
中から空気中に取り出すと、1.5〜2秒間で60℃の
温度上昇が観測されたとの報告もある。
For this reason, for example, there is a report that when a test piece of A1 alloy is taken out from liquid helium into air, a temperature rise of 60° C. is observed in 1.5 to 2 seconds.

従って上述前者の方法によると、試験片が冷却後、空気
中にさらされるので、瞬時にして温度が上昇し、このた
め温度は不安定となって設定低温下での試験が困難であ
り、又測定値も信頼性に欠ける欠点があった。
Therefore, according to the former method mentioned above, since the test piece is exposed to air after being cooled, the temperature rises instantaneously, making the temperature unstable and making it difficult to test at the set low temperature. Measured values also had the drawback of being unreliable.

一方後者の方法によると、試験片を空気中に取出さなく
て済むから、上述前者の欠点を解決できるものであるが
、試験の都度断熱箱が破壊されるので非能率的であるば
かりでなく、断熱箱が強度の測定値に与える影響を補正
しなければならないから面倒かつ煩雑であり、又任意温
度の制御が困難となる欠点がある。
On the other hand, according to the latter method, the test piece does not need to be taken out into the air, so it can solve the above-mentioned disadvantage of the former method, but it is not only inefficient, but also because the insulation box is destroyed each time the test is carried out. However, it is troublesome and complicated because it is necessary to correct the influence of the heat insulating box on the measured value of strength, and it also has the disadvantage that it is difficult to control the temperature arbitrarily.

そこで本発明は上述従来の欠点に鑑みて検討の結果、新
規な極低温衝撃試験方法及びその試験機を得たものであ
って、その目的とするところは、試験片の冷却、温度制
御空間と、衝撃試験空間が同一であって、実質的に大気
中にさらされることのない試、験を実施可能とすること
により、温度は安定して信頼性の高い測定値が得られる
と共に、試験片の大気中への取出し作業や、測定値の補
正等の煩わしい作業を回避でき、衝撃試験の作業能率を
向上させようとすることにある。
Therefore, as a result of studies in view of the above-mentioned conventional drawbacks, the present invention has developed a new cryogenic impact testing method and testing machine. By making it possible to perform tests in the same impact test space with virtually no exposure to the atmosphere, the temperature is stable and highly reliable measurements can be obtained, and the test specimen The purpose of this invention is to avoid the troublesome work of taking out the liquid into the atmosphere and correcting the measured values, thereby improving the work efficiency of impact tests.

以下本願の第1発明である試験方法の説示に先だって、
同方法の実施に適用される第2ないし第4発明の試、験
機を図示の具体例に基いて詳述する。
Prior to the explanation of the test method which is the first invention of the present application,
The test and test machines of the second to fourth inventions applied to the implementation of the method will be described in detail based on the illustrated specific examples.

機体1は第1図ないし第2図に示したように、例えばL
形鋼材等を適当に枠組みして横長に形成しである架台2
上の略中央部に、ハンマー4若しくは落錘による衝撃発
生装置3と、断熱箱5を搭載すると共に、低温液化ガス
供給装置6と、駆動手段7,7を備えて構成されている
As shown in FIGS. 1 and 2, the fuselage 1 is, for example,
Frame 2, which is formed into a horizontally long frame by appropriately framing shaped steel materials, etc.
A shock generating device 3 using a hammer 4 or a falling weight and a heat insulating box 5 are mounted approximately in the center of the top, and a low temperature liquefied gas supply device 6 and driving means 7, 7 are also provided.

図示例では衝撃発生手段としてハンマー4を用いた場合
であるが、上部の如くこの他落錘を用いるようにしても
よいことは勿論である。
In the illustrated example, a hammer 4 is used as the impact generating means, but it is of course possible to use a falling weight as shown in the upper part.

こ\で、上記衝撃発生装置3は、第3図ないし第5図に
示したように、試、鋏片8の支持台9と、該支持台9か
ら立設した主柱10・・・により一体化されていて、フ
レーム11に上記ハンマー4は回転自在に軸12により
枢着されており、上記支持台9が、上記断熱箱5の本体
5aにスタッド軸13・・・により固定したシールド板
14の上位にあって、断熱箱5内に固装され、上記衝撃
発生装置3は上記断熱箱5から上方へ突出させである。
As shown in FIGS. 3 to 5, the impact generating device 3 is constructed by a support 9 for the scissors 8 and a main pillar 10 erected from the support 9. The hammer 4 is rotatably pivoted to the frame 11 by a shaft 12, and the support stand 9 is connected to a shield plate fixed to the main body 5a of the insulation box 5 by a stud shaft 13. 14, and is fixedly housed within the heat insulating box 5, and the impact generating device 3 projects upward from the heat insulating box 5.

又、上記断熱箱5は、本体5aと、左右の可動部分sb
、5cとから形成されていて、その本体5aは、上記
架台2に固定され、一方可動部分sb 、5cは夫々下
端に車輪15を備えて、架台2に横設しであるレール1
6に係嵌し、夫々左右方向へ移動可能に配置されており
、上記本体5aの上部左右に開設しであるハンマー4の
通り口17.18を開閉できるようにしである。
The insulation box 5 also includes a main body 5a and left and right movable parts sb.
.
6, and are disposed so as to be movable in the left and right directions, respectively, so that the passage ports 17 and 18 for the hammer 4, which are opened on the left and right sides of the upper part of the main body 5a, can be opened and closed.

こ\で、上記通り口17.18は、上記ハンマー4が通
り抜けるのに十分、かつ最小限の大きさに設けてあって
、上記可動部分5b、5cには、夫々が閉塞された時、
本体5a内の支持台9を有する試験空間19を、本体5
a内に設けであるシールド板14,20.21・・・と
共に遮熱するようスタッド軸22・・・を介して内側に
シールド板23が夫々に設けである。
Here, the openings 17 and 18 are provided with a size large enough and minimum enough for the hammer 4 to pass through, and the movable parts 5b and 5c have no openings when the respective movable parts 5b and 5c are closed.
The test space 19 having the support stand 9 inside the main body 5a is
A shield plate 23 is provided on the inside via the stud shaft 22 . . . to provide heat insulation together with the shield plates 14, 20, 21 .

そして、上記可動部分5b 、5cは、架台2上に搭載
されたエアーシリンダ等の駆動手段7,7と連結されて
、左右に往復動されることにより、上記通り口17.1
8を開閉するようになっている。
The movable parts 5b and 5c are connected to drive means 7 and 7 such as air cylinders mounted on the pedestal 2, and are reciprocated from side to side.
8 to open and close.

又、上記低温液化ガス供給装置6は、上記断熱箱5の本
体5aに固定して試験片8に低温液化ガスをスプレーす
る単数若しくは複数個の噴射ノズル24.24と該ノズ
ル24.24を機体外に設置しであるガス容器25と真
空断熱された配管26で接続することにより構成されて
いる。
Further, the low temperature liquefied gas supply device 6 includes one or more injection nozzles 24.24 that are fixed to the main body 5a of the heat insulation box 5 and spray low temperature liquefied gas onto the test piece 8, and the nozzles 24.24 are attached to the body of the machine. It is constructed by connecting a gas container 25 installed outside with a vacuum-insulated piping 26.

次に本願の第1発明と、上述構成とした第2発明の作用
とについて説明する。
Next, the operation of the first invention of the present application and the second invention configured as described above will be explained.

先ず、駆動手段7,7により可動部分5b。First, the movable part 5b is moved by the drive means 7,7.

5cの双方、又は一方(図示例では5b側)を後退して
通り口17を開き、支持台9に試験片8をセットしたな
らば、可動部分5bを本体5a側に移動して通り口18
を閉じる。
5c (in the illustrated example, the 5b side) is moved back to open the passageway 17, and once the test piece 8 is set on the support stand 9, the movable part 5b is moved to the main body 5a side and the passageway 18 is opened.
Close.

次いで、低温液体ガス供給装置6により液体ヘリウム等
を噴射ノズル24.24から試験片8にスプレーし、該
試験片8が所定の温度に冷却された後、上記可動部分5
b、5cを夫々の1駆動手段7.7によって後退動作さ
せ、通り口1γ、18を開き、同時にハンマー4を振り
落して試験片8に衝突させるが、この際液体ヘリウムの
噴射は続行して、通り口17.18の開きによっても試
験片8が大気にふれないようにして試、鋏片8の温度上
昇を阻+hする。
Next, liquid helium or the like is sprayed onto the test piece 8 from the injection nozzle 24, 24 by the low-temperature liquid gas supply device 6, and after the test piece 8 is cooled to a predetermined temperature, the movable part 5 is
b and 5c are moved backward by their respective drive means 7.7 to open the passageways 1γ and 18, and at the same time the hammer 4 is shaken down to collide with the test piece 8, but at this time, the injection of liquid helium is continued. Also, by opening the openings 17 and 18, the test piece 8 is prevented from coming into contact with the atmosphere, thereby preventing the temperature rise of the scissors piece 8.

このように、試験片8を支持する空間と、衝撃試験空間
とは同一であり、かつその空間を囲む断熱箱5は、ハン
マー4が通り抜ける部分のみが開くだけであって、しか
も通りロ17.18開口後も液体ヘリウム等を試験片8
にスプレーしているので、温度が上昇することはなくな
り、よって所定の温度で衝撃試1験を行なうことができ
る。
In this way, the space that supports the test piece 8 and the impact test space are the same, and the insulation box 5 that surrounds that space opens only at the part where the hammer 4 passes through. 18 After opening, apply liquid helium etc. to the test piece 8.
Since the temperature is not increased, the impact test can be carried out at a predetermined temperature.

又、上記通り口17.18を開く為の両回動部分5b、
5cの動作と、ハンマー4を振り落す動作とは任意手段
により同期させることもできる。
Also, both rotating parts 5b for opening the above-mentioned openings 17 and 18,
The action of 5c and the action of swinging down the hammer 4 can also be synchronized by any means.

又、断熱箱5内の余分なスペースには、次回試験片を入
れておくようにしてもよく、このようにすると、試験片
は予冷されるので、これを支持台9に載置して試験すれ
ば、設定温度までの冷却を短時間に行なうことができる
Further, the extra space inside the insulation box 5 may be used to store a test piece next time.In this case, the test piece is pre-cooled, so it is placed on the support stand 9 and tested. This allows cooling to the set temperature in a short time.

次に本願の第3発明は、上述機体1を、例えば透視可能
なアクリル板等によるケース27に内装して、上述のよ
うに通り口17.18が開かれて衝撃試験を行なう時も
、低温液化ガスが大気(空気)と混じることのないよう
に構成したものである。
Next, in the third invention of the present application, the above-mentioned aircraft body 1 is housed in a case 27 made of, for example, a transparent acrylic plate, and even when an impact test is performed with the entrances 17 and 18 opened as described above, the airframe 1 is kept at a low temperature. The structure is such that liquefied gas does not mix with the atmosphere (air).

こ\で上記ケース27には、第1図に示したようにパル
プ28付きの回収管29が設けてあり、ケース27内に
低温液化ガスが充満した際、これ。
As shown in FIG. 1, the case 27 is provided with a recovery pipe 29 with a pulp 28 attached thereto, and when the case 27 is filled with low-temperature liquefied gas.

を回収して再使用できるようにしである。so that they can be collected and reused.

このようにケース27に機体1を内装すると、低温液化
ガスと空気との混合は阻止されるので試験片8の温度上
昇をより完全に防止できると共に、上記ガスが空気と混
合することによって機体1及、び断熱箱5に霜がつくこ
とを防止できるので、試験片8の冷却効率を更に良くす
ることができる。
When the fuselage 1 is housed in the case 27 in this way, mixing of the low-temperature liquefied gas and air is prevented, so a rise in the temperature of the test piece 8 can be more completely prevented. Furthermore, since frost can be prevented from forming on the heat insulating box 5, the cooling efficiency of the test piece 8 can be further improved.

更に本願の第4発明は、第6図、第7図に示したように
、断熱箱5内の余分なスペースに収納しておいた試験片
8′を、上記ケース27の外側か こら支持台9に載置
可能なるようマジックハンド30をケース27の一部に
気密に装着して構成したものである。
Furthermore, the fourth invention of the present application, as shown in FIGS. 6 and 7, supports the test piece 8' stored in the extra space inside the heat insulating box 5 from outside the case 27. The magic hand 30 is airtightly attached to a part of the case 27 so that it can be placed on the case 9.

こSで上記マジックハンド30は、把持部31付きの支
持杆32と、該支持杆32に、上記把持。
In this S, the magic hand 30 has a support rod 32 with a grip part 31, and the support rod 32 holds the grip.

部31の引き金33を引くことによってスプリン34の
弾力に抗して摺動自在なるよう支承した可動杆35とか
ら形成されていて、上記引き金33を引くことで可動杆
35はスプリング34の弾撥力に抗して摺動し、支持杆
32の先端と、可動杆35先端に夫々設けである挟持部
片32 a、35a間に試験片8′を挟持し、又上記引
き金32を解放することで可動杆35はスプリング34
により先端方向へ摺動して、試験片8′を解放するよう
になっている。
The movable rod 35 is supported so that it can slide freely against the elasticity of the spring 34 by pulling the trigger 33 of the section 31. Slide against the force, clamp the test piece 8' between clamping pieces 32a and 35a provided at the tip of the support rod 32 and the tip of the movable rod 35, respectively, and release the trigger 32. The movable rod 35 is a spring 34
The test piece 8' is released by sliding toward the distal end.

又このマジックハンド30は上述構成に限定するもので
はなく、他に任意構造のものが用いられるもので、何れ
の場合も、ケース27の開口部36に01Jング又は可
撓性の袋37を介して気密に、かつ可動的に支持しであ
る。
Furthermore, this magic hand 30 is not limited to the above-mentioned configuration, and any other structure may be used. It is airtightly and movably supported.

而して上記構成によると、断熱箱5の試験空間余剰スペ
ースに試験片8′・・・を収納して予冷したものを、機
体1の密封状態においてマジックハンド30によって支
持台9に載置することができるので、試験片セット時、
試験空間19内に空気が混入することを防止でき、かつ
予冷した試験片の温度上昇を最小限となし得て都合がよ
い。
According to the above configuration, the test pieces 8' are stored in the surplus test space of the heat insulating box 5 and pre-cooled, and placed on the support stand 9 by the magic hand 30 while the machine body 1 is in a sealed state. When setting the test piece,
This is advantageous in that it is possible to prevent air from entering the test space 19 and to minimize the temperature rise of the pre-cooled test piece.

以上説明したように本発明に係る極低温衝撃試験方法に
よれば、支持台9に試験片8をセットし、これを冷却、
温度制御しながら、その空間内で衝撃試験を行なうよう
にしたから、試験片8が空気中にさらされることはない
ので温度は安定して所定の低温条件下での衝撃試験を行
なうことができて、従って従来例の如く試験の晩に断熱
箱を破壊する方法とは違い測定値に与える影響を補正す
る必要はないので、簡単にして信頼性の高い測定結果が
得られる。
As explained above, according to the cryogenic impact test method according to the present invention, the test piece 8 is set on the support stand 9, and is cooled and
Since the impact test is conducted in that space while controlling the temperature, the test piece 8 is not exposed to the air, so the temperature is stable and the impact test can be performed under the specified low temperature conditions. Therefore, unlike the conventional method of destroying the heat insulating box on the night of the test, there is no need to correct the influence on the measured values, so that highly reliable measurement results can be obtained easily.

又、本願の試験機によれば、ハンマー4や落錘の落下に
タイミングをとって、それらが通り抜は可能な部分だけ
の通り口17.18を開くよう断熱箱5は形威しである
から、試験片の温度上昇を最小限にとどめ得る構成であ
り、かつ試験時も低温液化ガスの噴射を続行して試験片
8が空気にさらされない構成としたから、上述試験方法
の実施に連中でき、更に機体1がケース27に内装して
あって、該ケース27に気密に支承してマジックハンド
30を取付けて構成したものであるから、低温液化ガス
が空気と混じることによって機体1や断熱箱5に霜がつ
くことを防止でき、冷却効率が良く、又ケース27内の
低温液化ガスを回収して再使用も可能となると共に、断
熱箱5は破壊するものではないから経済的でかつ安全で
ある。
Furthermore, according to the testing machine of the present application, the insulation box 5 is designed to open the passage ports 17 and 18 only in areas where the hammer 4 and the falling weight can pass through, in time with the fall of the hammer 4 and the falling weight. Therefore, the structure was designed to minimize the temperature rise of the test piece, and the test piece 8 was not exposed to air by continuing to inject low-temperature liquefied gas during the test, so it was difficult to carry out the above test method. Furthermore, since the fuselage 1 is internally housed in a case 27, and the magic hand 30 is attached to the case 27, the fuselage 1 and its insulation are It is possible to prevent frost from forming on the box 5, the cooling efficiency is good, the low-temperature liquefied gas in the case 27 can be recovered and reused, and the heat insulating box 5 is not destroyed, so it is economical. It's safe.

尚試験片8を所望設定悪寒とするためには、同片8に温
度検知素子を当接しておき、同素子による出力を利田し
て低温液化ガスの噴出量、悪寒等を制御するなど適宜の
手段を用いることができる。
In order to set the test piece 8 to the desired chill temperature, a temperature sensing element is brought into contact with the test piece 8, and the output from the element is used to control the amount of low-temperature liquefied gas ejected, chill temperature, etc., as appropriate. Means can be used.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明に係る極低温衝撃試験方法を実施し得る
試験機の一具体例を示した正面図、第2図は同機の平面
図、第3図は同機における断熱箱の拡大縦断正面図、第
4図は同断熱箱の拡大縦断側面図、第5図は同断熱箱の
拡大横断面図、第6図は同機にマジックハンドを取付け
た状態を示す部分正面図、第7図はマジックハンドの一
例を示した部分側面図である。 1・・・機体、3・・・衝撃発生装置、4・・・ハンマ
ー5・・・断熱箱、5a・・・断熱箱の本体、sb 、
5c・・・断熱箱の可動部分、6・・・低温液化ガス
供給装置、7・・・、駆動手段、8・・・試験片、9・
・・支持台、17゜18・・・ハンマー等通り口、19
・・・試1験空間、24・・・噴射ノズル、27・・・
ケース、30・・・マジックハンド。
Fig. 1 is a front view showing a specific example of a testing machine capable of carrying out the cryogenic impact test method according to the present invention, Fig. 2 is a plan view of the machine, and Fig. 3 is an enlarged longitudinal cross-sectional front view of the insulating box of the machine. Figure 4 is an enlarged longitudinal sectional side view of the insulation box, Figure 5 is an enlarged cross-sectional view of the insulation box, Figure 6 is a partial front view showing the state in which the magic hand is attached to the aircraft, and Figure 7 is FIG. 2 is a partial side view showing an example of a magic hand. DESCRIPTION OF SYMBOLS 1... Airframe, 3... Shock generator, 4... Hammer 5... Insulating box, 5a... Main body of the insulating box, sb,
5c... Movable part of the insulation box, 6... Low temperature liquefied gas supply device, 7... Drive means, 8... Test piece, 9...
・・Support stand, 17° 18 ・・Hammer etc. entrance, 19
...Test 1 test space, 24...Injection nozzle, 27...
Case, 30...Magic Hand.

Claims (1)

【特許請求の範囲】 1 シャルピー及び落錘衝撃試験方法において、支持台
に試験片をセットしたまX試験空間を断熱箱で囲み、試
験片に低温液化ガスをスプレーし、試験片が設定温度に
達したとき、上記断熱箱におけるハンマー若しくは落錘
の通り口のみをハンマー若しくは落錘の衝撃動作と同期
させて開口し、上記通り口の開成状態にあっても低温液
化ガスのスプレーを続行させながら当該試験に対する衝
撃試験を行なうようにしたことを特徴とする極低温衝撃
試験方法。 2 下部に試1験片の支持台を備えたハンマー若しくは
落錘の衝撃発生装置と、上記支持台に試験片をセットし
た状態で試験空間を包囲する断熱箱と、該断熱箱内の試
験片に低温液化ガスをスプレーする噴射ノズルを備えた
低温液化ガス供給装置とからなり、上記断熱箱は、固定
側の本体に対して可動部分を有し、該可動部分が上記ハ
ンマー若しくは落錘の動作と同期して開き動作が行なわ
れるよう所望駆動手段に取付けてなることを特徴とする
極低温衝撃試験機。 3 %許請求の範囲第2項に記載の極低温衝撃式1験機
において、少なくともハンマー若しくは落錘の通り口が
開いた衝撃試験時にあって、低温液化ガスと大気との混
合を阻止可能なるよう機体をケースに内装してなること
を特徴とする極低温衝撃試験機。 4 特許請求の範囲第2項記載の極低温衝撃試験機にお
いて、少なくともハンマー若しくは落錘の通り口が開い
た衝撃試験時にあって、低温液化ガスと大気との混合を
阻止可能なるよう機体をケースに内装し、さらに試4験
空間の残余スペース中に置かれる次回試験用としての試
験片を上記ケース外部からの操作により支持台にセット
自在なるようマジックハンドを上記ケースに気密に取付
けてなることを特徴とする極低温衝撃試験機。
[Claims] 1. In the Charpy and falling weight impact test methods, the X test space is surrounded by a heat insulating box while the test piece is set on a support stand, and low temperature liquefied gas is sprayed onto the test piece so that the test piece reaches a set temperature. When this happens, only the opening of the hammer or falling weight in the insulation box is opened in synchronization with the impact action of the hammer or falling weight, while continuing to spray low temperature liquefied gas even when the opening is open. A cryogenic impact test method, characterized in that an impact test is performed for the test. 2. An impact generating device such as a hammer or falling weight with a supporting stand for the test piece 1 at the bottom, an insulating box that surrounds the test space with the test piece set on the supporting stand, and the test piece inside the insulating box. and a low-temperature liquefied gas supply device equipped with an injection nozzle for spraying low-temperature liquefied gas to the body, and the heat-insulating box has a movable part relative to the stationary body, and the movable part controls the action of the hammer or falling weight. A cryogenic impact tester, characterized in that it is attached to a desired driving means so that the opening operation is performed in synchronization with the opening operation. 3% In the cryogenic impact test machine described in claim 2, it is possible to prevent mixing of low-temperature liquefied gas and the atmosphere at least during the impact test with the opening of the hammer or falling weight open. A cryogenic impact testing machine characterized by having a body built into a case. 4. In the cryogenic impact tester set forth in claim 2, the fuselage is cased to prevent mixing of the low-temperature liquefied gas with the atmosphere at least during the impact test with the opening for the hammer or falling weight open. A magic hand is airtightly attached to the case so that the test piece for the next test to be placed in the remaining space of the test space can be set on the support stand by operation from outside the case. A cryogenic impact tester featuring:
JP18913980A 1980-12-26 1980-12-26 Cryogenic impact test method and testing machine Expired JPS5830532B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP18913980A JPS5830532B2 (en) 1980-12-26 1980-12-26 Cryogenic impact test method and testing machine
US06/334,320 US4405243A (en) 1980-12-26 1981-12-21 Cryogenic impact testing method and machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18913980A JPS5830532B2 (en) 1980-12-26 1980-12-26 Cryogenic impact test method and testing machine

Publications (2)

Publication Number Publication Date
JPS57110937A JPS57110937A (en) 1982-07-10
JPS5830532B2 true JPS5830532B2 (en) 1983-06-29

Family

ID=16236058

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18913980A Expired JPS5830532B2 (en) 1980-12-26 1980-12-26 Cryogenic impact test method and testing machine

Country Status (1)

Country Link
JP (1) JPS5830532B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990043796A (en) * 1997-11-29 1999-06-15 정몽규 Low temperature impact tester for nonmetal materials
CN103424319B (en) * 2013-08-09 2015-05-20 合肥通用机械研究院 Ultralow-temperature impact test device and test method thereof
CN110763576A (en) * 2019-10-22 2020-02-07 哈尔滨工程大学 Low-temperature environment box for ice material Hopkinson bar experiment
CN111043900B (en) * 2020-01-01 2022-03-01 哈尔滨工业大学 Medium-low temperature high-speed impact test device and test method thereof

Also Published As

Publication number Publication date
JPS57110937A (en) 1982-07-10

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