JPS60128324A - Gripping tool of material testing machine - Google Patents

Gripping tool of material testing machine

Info

Publication number
JPS60128324A
JPS60128324A JP23768783A JP23768783A JPS60128324A JP S60128324 A JPS60128324 A JP S60128324A JP 23768783 A JP23768783 A JP 23768783A JP 23768783 A JP23768783 A JP 23768783A JP S60128324 A JPS60128324 A JP S60128324A
Authority
JP
Japan
Prior art keywords
test piece
load
load rod
rod
test
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
Application number
JP23768783A
Other languages
Japanese (ja)
Other versions
JPH0456939B2 (en
Inventor
Munesada Soma
相馬 宗貞
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.)
Shimadzu Corp
Shimazu Seisakusho KK
Original Assignee
Shimadzu Corp
Shimazu Seisakusho KK
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 Shimadzu Corp, Shimazu Seisakusho KK filed Critical Shimadzu Corp
Priority to JP23768783A priority Critical patent/JPS60128324A/en
Publication of JPS60128324A publication Critical patent/JPS60128324A/en
Publication of JPH0456939B2 publication Critical patent/JPH0456939B2/ja
Granted legal-status Critical Current

Links

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
    • G01N3/02Details
    • G01N3/04Chucks
    • 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
    • G01N2203/0226High temperature; Heating means
    • 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
    • G01N2203/04Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0423Chucks, fixtures, jaws, holders or anvils using screws

Landscapes

  • 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

PURPOSE:To improve efficiency of test by projecting a jig engaged to a test piece in an atmospheric chamber, to the outside of the chamber along a load rod, clamping the test piece the axial direction between the load rod and the jig, and fixing the test piece and the load rod in the chamber. CONSTITUTION:In a heating furnance 2, each sleeve 4H, 4L are engaged to a screw threads 1a, and projected to the outside of the heating furnace 2 along each load rod 3H, 3L. Each bolt 5 is provided on the outside of the heating furnace 2, inserted into a through-hole of a flange 6 of each sleeve 4H, 4L and each load rod 3H, 3L, and a test piece 1 is clamped in the axial direction between the load rod and the sleeve by screwing a nut 7. When the part between the load rod and the test piece is loosened by an influence of heat, the test piece 1 can be fixed without taking it out of the heating furnace 2 by operating the nut 7.

Description

【発明の詳細な説明】 (イ)産業上の利用分野 この発明は、負荷ロッドによって試験片に引張圧縮繰返
し荷重などの試験荷重を加え、高温炉内などの雰囲気チ
ャンバ内で試験片を材料試験する材料試験機に関するも
のであり、特にその試験片を負荷ロッドに固定するため
のつかみ具に関するものである。
Detailed description of the invention (a) Industrial application field This invention applies a test load such as a tensile compression cyclic load to a test piece using a load rod, and performs a material test on the test piece in an atmospheric chamber such as a high-temperature furnace. The present invention relates to a material testing machine for testing materials, and in particular to a grip for fixing the test piece to a load rod.

(ロ)従来技術 たとえば、試験片を高温疲労試験するには、試験片に引
張圧縮繰返し荷重を与える負荷ロッドを使用し、つかみ
具によって試験片を負荷ロッドに固定する。そして、つ
かみ具、試験片および負荷ロッドを高温炉内に挿入すれ
ばよい。高温炉によって試験片を高温に加熱し、負荷ロ
ッドによって試験片に引張圧縮繰返し荷重を加えると、
試験片を高温炉内で材料試験し、高温□疲労試験するこ
とができる。− しかしながら、この種の材料試験機において、高温炉に
よって試験片を加熱すると、つかみ具と負荷ロッドも加
熱され、つかみ具、試験片および負荷ロッドがそれぞれ
熱膨張する。このため、試験片と負荷ロッド間が緩むこ
とがある。試験片と負荷ロッド間が緩むと、試験片に試
験荷重が加えられず、試験を続行することができない。
(b) Prior Art For example, in order to perform a high temperature fatigue test on a test piece, a load rod is used to apply a repeated tensile/compressive load to the test piece, and the test piece is fixed to the load rod with a grip. The grip, test piece, and load rod may then be inserted into the high temperature furnace. When a test piece is heated to a high temperature in a high-temperature furnace and a tensile and compressive cyclic load is applied to the test piece using a loading rod,
The specimen can be material tested in a high temperature furnace and subjected to a high temperature □ fatigue test. - However, in this type of material testing machine, when the specimen is heated by the high-temperature furnace, the grip and the load rod are also heated, causing thermal expansion of the grip, the specimen, and the load rod, respectively. Therefore, the space between the test piece and the load rod may become loose. If the connection between the test piece and the load rod becomes loose, no test load can be applied to the test piece and the test cannot be continued.

このため、従来は、一旦高温炉の温度を下げ、つかみ具
、試験片および負荷ロッドを高温炉外に取り出し、高温
炉外で試験片を負荷ロッドに固定していた。
For this reason, conventionally, the temperature of the high-temperature furnace was lowered, the grips, the test piece, and the load rod were taken out of the high-temperature furnace, and the test piece was fixed to the load rod outside the high-temperature furnace.

したがって、つかみ具、試験片および負荷ロッドを高温
炉内に挿入し、再度高温炉の温度を上げる必要があった
。新しい試験片を使用し、最初から試験をやり直す必要
がある場合もある。このため、試験の能率が悪いという
問題があった。
Therefore, it was necessary to insert the grip, the test piece, and the load rod into the high-temperature furnace and raise the temperature of the high-temperature furnace again. It may be necessary to restart the test from scratch using a new specimen. For this reason, there was a problem that the efficiency of the test was low.

なお、試験片と負荷ロッド間が緩まないよう試験片を負
荷ロッドに強く締め付けると、つかみ具、試験片および
負荷ロッド間に焼き付きが生じる。
Note that if the test piece is strongly tightened to the load rod so that the space between the test piece and the load rod does not loosen, seizure will occur between the grip, the test piece, and the load rod.

このため、試験片を負荷ロッドに強く締め付けることは
できず、試験片と負荷ロッド間が緩むのはさけられない
For this reason, the test piece cannot be strongly tightened to the load rod, and loosening between the test piece and the load rod is inevitable.

(ハ)目 的 したがって、この発明は、高温炉内などの雰囲気チャン
バ内で試験片を材料試験する材料試験機試験井および負
荷ロッドを雰囲門チャンバ外に取り出さず、そのまま雰
囲気チャンバ内で試験片を負荷ロッドに固定し、試験の
能率を向上させるこきを目的としてなされたものである
(C) Purpose Therefore, the present invention provides a material testing machine for testing the material of a test piece in an atmosphere chamber such as a high-temperature furnace. This was done for the purpose of fixing the piece to a load rod to improve testing efficiency.

この発明は、雰囲気チャンバ内で試験片に係合させた治
具を負荷ロッドに沿って雰囲気チャンバ外に突出させる
。そして、雰囲気チャンバ外に負荷ロッドと治具間を負
荷ロッドの軸方向に締め付ける締め付は機構を設け、÷
の締め付は機構によって試験片を負荷ロッドと治具間に
軸方向に挟みつける。これによって試験片を負荷ロッド
に固定するようにしたことを特徴とするものである。
In this invention, a jig engaged with a test piece within an atmosphere chamber is projected out of the atmosphere chamber along a load rod. A mechanism is installed outside the atmosphere chamber to tighten the load rod and jig in the axial direction of the load rod.
For tightening, the test piece is clamped in the axial direction between the load rod and the jig by a mechanism. This method is characterized in that the test piece is fixed to the load rod.

(ホ)実施例 以下、この発明の実施例を図面について説明する。(e) Examples Embodiments of the present invention will be described below with reference to the drawings.

第1図において、試験片(1)は加熱炉(2)によって
高温に加熱される。この試験機は、上下一対の負荷ロッ
ド(3H)、(3いによって試験片(1)に引張圧縮繰
返し荷重が加えられ、試験片(13が加熱炉(2)内で
材料試験され、高温疲労試験される。
In FIG. 1, a test piece (1) is heated to a high temperature in a heating furnace (2). This testing machine applies tensile and compressive cyclic loads to the test piece (1) using a pair of upper and lower loading rods (3H), and the test piece (13) is subjected to a material test in a heating furnace (2), resulting in high-temperature fatigue fatigue. tested.

試験片(1)は上下一対のスリーブ(41−I)、(4
L)と複数のボルト(5)によって各負荷ロッド(3H
)。
The test piece (1) consists of a pair of upper and lower sleeves (41-I), (4
L) and each load rod (3H) by several bolts (5)
).

(3L)に固定されている。各スリーブ<4H)。(3L). Each sleeve <4H).

(4L)は各負荷ロッド(3H)、(3L>のまわりに
二重筒状に配置され、スリーブ(,4)()、(4L)
、試験片(1)および負荷ロッド(3H)、(3L)は
加熱炉(2)内に挿入されている。
(4L) is arranged in a double cylindrical shape around each load rod (3H), (3L>, and the sleeve (,4) (), (4L)
, the test piece (1) and the load rods (3H) and (3L) are inserted into the heating furnace (2).

試験片(1)はその両端にねし山(1a)を形成したL
のである。この実施例では、加熱炉(2)内で各スリー
ブ(4)()、(4L)が試験片(1)のねじ山(la
)にねじ合わされ、係合されている。各スリーブ(4H
)、(4L)は各負荷ロッド(3H)、(3,L)に沿
って加熱炉(2)外に突出し、各ボルト(5)は加熱炉
(2)外に設けられ、各スリーブ(41−1)。
The test piece (1) is an L with threaded ridges (1a) formed at both ends.
It is. In this example, each sleeve (4) (), (4L) is attached to the thread (la) of the specimen (1) in the heating furnace (2).
) are screwed together and engaged. Each sleeve (4H
), (4L) protrude outside the heating furnace (2) along each load rod (3H), (3,L), each bolt (5) is provided outside the heating furnace (2), and each sleeve (41 -1).

(4L)と各負荷ロッド(3H>、(3L>のフランジ
(6)の透孔に挿入されtいる。したがって、各ボルト
(5)にナツト(7)をねじ合わせると、ボルト(5)
とナヅト(7)によって負荷ロッド(3H)。
(4L) and each load rod (3H>, (3L>) is inserted into the through hole of the flange (6). Therefore, when the nut (7) is screwed onto each bolt (5), the bolt (5)
and load rod (3H) by Nazuto (7).

(3L)とスリーブ(4H)、(4L)を負荷ロッド(
3H)、(3L)の軸方向に締め付けることができる。
(3L) and sleeve (4H), (4L) to the load rod (
3H) and (3L) can be tightened in the axial direction.

したがって、試験片(l)を負荷ロッド(3H)。Therefore, the test specimen (l) is loaded onto the rod (3H).

(3L)とスリーブ(4H)、(4L)間に軸方向に挾
みつけることができる。スリーブ(4H)、(4L)は
引張荷重を受け、負荷ロッド(3H)、(3L)は圧縮
荷重を受ける。これによって試験片(1)が負荷ロッド
(3)(>、(3L)に固定されているものである。
(3L) and sleeves (4H) and (4L) can be sandwiched in the axial direction. The sleeves (4H), (4L) are subjected to tensile loads, and the load rods (3H), (3L) are subjected to compressive loads. As a result, the test piece (1) is fixed to the load rod (3) (>, (3L)).

この試験機において、加熱炉(2)によって試験片(1
)を高温に加熱し、負荷ロッド(31−1)、(3L)
によって試験片(1)に引張圧縮繰返し荷重を加えると
、試験片(1)を高温炉(2)内で材料試験し、高温疲
労試験することができる。試験片(1)の荷重はロード
セルなどの検出器によって検出され、記録計によって記
録される。
In this testing machine, a test piece (1
) to a high temperature, load rods (31-1), (3L)
By applying a tensile compression cyclic load to the test piece (1), the test piece (1) can be subjected to a material test in a high-temperature furnace (2) and subjected to a high-temperature fatigue test. The load on the test piece (1) is detected by a detector such as a load cell and recorded by a recorder.

しかしながら、加熱炉(2)によって試験片(1)を加
熱すると、スリーブ(4m−1)、(4L)および負荷
ロッド(31−1)、(3L)も加熱され、試験片(,
1)、スリーブ(4H)、(4L)および負荷ロッド(
3H)。
However, when the test piece (1) is heated by the heating furnace (2), the sleeve (4m-1), (4L) and the load rods (31-1), (3L) are also heated, and the test piece (,
1), sleeve (4H), (4L) and load rod (
3H).

(3L)がそれぞれ熱膨張する。このため、試験片(1
)と負荷ロッド(3H)、(3L)間が緩むことがある
。試験片(1)と負荷ロッド(3)1)、(3L)間が
緩むと、試験片(1)に荷重が加えられず、記録計の記
録波形が乱れる。
(3L) respectively undergo thermal expansion. For this reason, the test piece (1
) and the load rods (3H) and (3L) may become loose. If the space between the test piece (1) and the load rods (3) 1) and (3L) becomes loose, no load will be applied to the test piece (1), and the recorded waveform of the recorder will be disturbed.

この試験機は、試験片(1)と負荷ロッド(3)()。This testing machine consists of a test piece (1) and a load rod (3).

(3L)間が緩んだとき、そのまま加熱炉〈2)内で試
験片(1)を負荷ロッド(3H)、(3L)に固定する
ことができる。試験片(1)を負荷ロッド(3H)。
(3L) When the gap is loosened, the test piece (1) can be fixed to the load rods (3H) and (3L) in the heating furnace (2) as it is. Load the test piece (1) onto the rod (3H).

(3L)に固定するには、加熱炉(2)外でボルト(5
)およびナツト(7)を操作すればよい。ボルト(5)
とナツト(7)によって負荷ロッド(31−1)。
(3L), attach the bolts (5L) outside the furnace (2).
) and nut (7). Bolt (5)
and the load rod (31-1) by the nut (7).

く3L)とスリーブ(4H)、(4L)間を負荷ロッド
(3H)、(3L)の軸方向に締め付けると、試験片(
1)は負荷ロッド(3H)、(3L)とスリーブ(4H
a、(4L)間に軸方向に挾みつけられる。これによっ
て試験片(1)を負荷ロッド(3H’)’、’ (3L
)に固定することができる。したがって、加熱炉(2)
の温度を下げる必要がなく、スリーブ(41−1)、(
4L)、試験片(1)および負荷ロッド(3H)、< 
3 L)を加熱炉(2)外に取り出す必要もない。した
がって、そのまま試験を継続することができ、能率を向
上させることができる。
When the test piece (3L) and the sleeve (4H), (4L) are tightened in the axial direction of the load rod (3H), (3L), the test piece (
1) Load rods (3H), (3L) and sleeve (4H)
It is sandwiched in the axial direction between a and (4L). This allows the test piece (1) to be loaded onto the load rods (3H')',' (3L
) can be fixed. Therefore, the heating furnace (2)
There is no need to lower the temperature of the sleeve (41-1), (
4L), test piece (1) and load rod (3H), <
There is no need to take the 3 L) out of the heating furnace (2). Therefore, the test can be continued as it is, and efficiency can be improved.

なお、この発明には前記実施例の他に種々の変形例が考
えられる。たとえば、第2図に示すように、負荷ロッド
(3H)、(3L)と試験片(1)間に鋼球(8)を」
・在させ、鋼球(8)を介して試験片(1)を負荷ロッ
ド(3H)、(3L)に固定してもよい。第3図に示す
ように、両端に肩部(lb)を有する試験片(1)を負
荷ロッド(3H)、(3L)に固定することもできる。
It should be noted that various modifications of the present invention are possible in addition to the above-mentioned embodiments. For example, as shown in Figure 2, a steel ball (8) is placed between the load rods (3H), (3L) and the test piece (1).
- The test piece (1) may be fixed to the load rods (3H) and (3L) via the steel balls (8). As shown in FIG. 3, a test piece (1) having shoulders (lb) at both ends can also be fixed to load rods (3H), (3L).

この場合は、試験片(1)の肩部(lb)に係合させた
割りナツト(9)をスリーブ(4)()、 (4L)に
ねじ合わせ、試験片(1)を負荷ロッド(3H)、(3
L)と割りナツト(9)間に軸方向に挾みつければよい
。これによって試験片(1)を負荷ロッド(3H)、(
3L)に固定することができる。この他、場合によって
は、スリーブ(4H)、(4L)以外の形状の治具を使
用してもよい。ボルト(5)およびナツト(7)以外の
構造の締め付は機構を使用してもよい。要するに、加熱
炉(2)内で試験片(1)に係合させた治具を負荷ロッ
ド(3H)、(3L)に沿って加熱炉(2)外に突出さ
せ、加熱炉(2)外に負荷ロッド(3H)、(3L)と
治具間を負荷ロッド(3H)、(3L)の軸方向に締め
付ける締め付は機構を設ける。そして、その締め付は機
構によって試験片(1)を負荷ロッド(3H)、(3L
)と治具間に軸方向に挾みつければよいものである。こ
れによって試験片(1)を負荷ロッド(3H)、(3L
)に固定することができ、同様の作用効果を得ることが
できる。さらに、この発明は、加熱炉(2)内辺外の雰
囲気チャンバ内で試験片(,1)を材料試験する材料試
験機に適用することもできる。
In this case, screw the split nut (9) engaged with the shoulder (lb) of the test piece (1) onto the sleeve (4) (4L), and then attach the test piece (1) to the load rod (3H). ), (3
L) and the split nut (9) in the axial direction. This allows the test piece (1) to be attached to the load rod (3H), (
3L). In addition, jigs having shapes other than the sleeves (4H) and (4L) may be used depending on the case. Mechanisms may be used to tighten structures other than the bolts (5) and nuts (7). In short, the jig engaged with the test piece (1) in the heating furnace (2) is projected outside the heating furnace (2) along the load rods (3H) and (3L), and A tightening mechanism is provided to tighten between the load rods (3H), (3L) and the jig in the axial direction of the load rods (3H), (3L). The tightening mechanism is used to tighten the test piece (1) through the load rod (3H) and (3L).
) and a jig in the axial direction. This allows the test piece (1) to be loaded onto the load rod (3H), (3L).
), similar effects can be obtained. Furthermore, the present invention can also be applied to a material testing machine that tests the material of the test piece (, 1) in an atmosphere chamber outside the inner periphery of the heating furnace (2).

(へ)効 果 以上説明したように、この発明は、試験片と負荷ロッド
間が緩んだとき、試験片および負荷ロッドを雰囲気チャ
ンバ内から取り出さなくても、そのまま雰囲気チャンバ
内で試験片を負荷ロッドに固定することができる。した
がって、試験を継続し、能率を向上させることができ、
所期の目的を達成することができるものである。
(f) Effects As explained above, in the present invention, when the space between the test piece and the load rod becomes loose, the test piece can be loaded in the atmosphere chamber without having to take out the test piece and the load rod from the atmosphere chamber. Can be fixed to the rod. Therefore, testing can continue and efficiency can be improved,
It is possible to achieve the intended purpose.

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

第1図はこの発明の一実施例を示す断面図、第2図およ
び第3図はそれぞれ第1図の変形例を示す断面図である
。 (1)・・・・・・・・・・・・・・・・・・・・・・
・・試験片(2)・・・・・・・・・・・・・・・・・
・・・・・・・加熱炉(3H)、(3L>・・・・・・
・・・負荷ロッド 。 (4H)、(4L)・・・・・・・・・スリーブ(5)
・・・・・・・・・・・・・・・・・・・・・・・・ボ
ルト(7う・・・・・・・・・・・・・・・・・・・・
・・・・ナツト特許出願人 株式会社島津製作所 代 理 人 新 実 健 部 (外1名) III 図。 第2図痰3図
FIG. 1 is a sectional view showing one embodiment of the present invention, and FIGS. 2 and 3 are sectional views showing modifications of FIG. 1, respectively. (1)・・・・・・・・・・・・・・・・・・・・・
・・Test piece (2)・・・・・・・・・・・・・・・・・・
・・・・・・Heating furnace (3H), (3L>・・・・・・
...Load rod. (4H), (4L)...Sleeve (5)
・・・・・・・・・・・・・・・・・・・・・・・・Bolt (7u・・・・・・・・・・・・・・・・・・・・・
...Natsuto Patent Applicant Shimadzu Corporation Representative Kenji Arata (1 other person) Figure III. Figure 2 Sputum Figure 3

Claims (1)

【特許請求の範囲】[Claims] つかみ具によって試験片を負荷ロッドに固定し、前記つ
かみ具、試験片および負荷ロッドを雰囲気チャンバ内に
挿入し、前記負荷ロッドによって前記試験片に引張圧縮
繰返し荷重などの試験荷重を加え、前記チャンバ内で励
記試験片を材料試験するようにした材料試験機において
、前記チャンバ内で前記試験片に係合させた治具を前記
負荷ロッドに沿って前記チャンバ外に突出させ、前記チ
ャンバ外に前記負荷ロッドと前記治具間を前記負荷ロッ
ドの軸方向に締め付ける締め付は機構を設け、前記締め
付は機構によって前記試験片を前記負荷ロッドと前記治
具間に軸方向iこ挾みつけ、これによって前記試験片を
前記負荷ロッドに固定するようにしたことを特徴とする
つかみ具。
A test piece is fixed to a load rod by a grip, the grip, the test piece, and the load rod are inserted into an atmosphere chamber, a test load such as a tensile compression cyclic load is applied to the test piece by the load rod, and the test piece is placed in the chamber. In a material testing machine configured to perform a material test on an excited test piece within the chamber, a jig engaged with the test piece within the chamber is made to protrude outside the chamber along the load rod, and A mechanism is provided for tightening between the load rod and the jig in the axial direction of the load rod, and the tightening is performed by clamping the test piece between the load rod and the jig in the axial direction, A gripping device characterized in that the test piece is thereby fixed to the load rod.
JP23768783A 1983-12-15 1983-12-15 Gripping tool of material testing machine Granted JPS60128324A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23768783A JPS60128324A (en) 1983-12-15 1983-12-15 Gripping tool of material testing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23768783A JPS60128324A (en) 1983-12-15 1983-12-15 Gripping tool of material testing machine

Publications (2)

Publication Number Publication Date
JPS60128324A true JPS60128324A (en) 1985-07-09
JPH0456939B2 JPH0456939B2 (en) 1992-09-10

Family

ID=17019015

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23768783A Granted JPS60128324A (en) 1983-12-15 1983-12-15 Gripping tool of material testing machine

Country Status (1)

Country Link
JP (1) JPS60128324A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112021000093T5 (en) 2021-06-18 2023-03-02 Ngk Insulators, Ltd. Testing device and test method for a columnar honeycomb filter

Also Published As

Publication number Publication date
JPH0456939B2 (en) 1992-09-10

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