JPS60114742A - Hardness tester - Google Patents

Hardness tester

Info

Publication number
JPS60114742A
JPS60114742A JP22387983A JP22387983A JPS60114742A JP S60114742 A JPS60114742 A JP S60114742A JP 22387983 A JP22387983 A JP 22387983A JP 22387983 A JP22387983 A JP 22387983A JP S60114742 A JPS60114742 A JP S60114742A
Authority
JP
Japan
Prior art keywords
load
indenter
sample
hardness
spindle
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
Application number
JP22387983A
Other languages
Japanese (ja)
Inventor
Akira Nishihara
西原 公
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP22387983A priority Critical patent/JPS60114742A/en
Publication of JPS60114742A publication Critical patent/JPS60114742A/en
Pending 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
    • G01N3/40Investigating hardness or rebound hardness
    • G01N3/42Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid

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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

PURPOSE:To set a load and a loading speed easily and as desired in a hardness test by connecting an electric rotary driving means to an indenter support through a reversing gear and speed reduction gear while a means of detecting a load applied on a sample by an indenter is provided. CONSTITUTION:A sample 23 is placed on a table 2a and a program memory 21 is specified for a main control section 12 from a keyboard 20. According to the program, a servomotor 16 is driven or controlled with a motor control section 15 or the like and a spindle 3 is lowered through a rotary motion-linear motion converting/speed reduction gear 19. The tip of the indenter 5 abbuts against the sample 23 on the table 2a. Additionally, a load applied is detected with a strain sensor 9 and inputted into the main control section 12 through a transducer 6 and an A/D converter 11 to be brought down to the reference load. After this condition is maintained for a specified time, a test load is applied and the depth of a pressure liquid is measured to determine the hardness, which is shown on a display 22.

Description

【発明の詳細な説明】 (旬00発明技術分野 本発明は、正確な荷重制紳が可能な硬 さ試験機に関する。[Detailed description of the invention] (Shun 00 invention technology field The present invention is a rigid system that allows accurate load control. Regarding the test machine.

(b)、技術の背景 硬さ試験は試−験体なごく僅か傷つけるだけで、その試
験体の機械的性質を判定できる試験法であり、各種の製
造現場で欠かずこと無く首肩的に実施されている。
(b) Background of the technology Hardness testing is a test method that can determine the mechanical properties of a specimen by only slightly damaging it, and is indispensable at various manufacturing sites. It has been implemented.

(C)、従来技術と問題点 従来、硬さ試験機ば重錘又はバネとダ ッシュボットを用いたm減成の荷重負荷方式が一般的e
あり、従って、その機構は大聖で重置も重く取り扱いが
極めて不便であった。しかも、荷重の負荷速度を変化さ
せようとすると、ダッシュポットの特性を変える必要が
あり、また荷重を変える場合には重錘を取り替える必要
が生じる等、機動的な使用に困難を来tこすこともしば
しばIlっな。
(C), Conventional technology and problems Conventionally, hardness testers generally use a weight reduction method using a weight or a spring and a dashbot.
Therefore, the mechanism was very important and heavy, making it extremely inconvenient to handle. Moreover, if you try to change the loading speed of the load, you will need to change the characteristics of the dashpot, and if you change the load, you will also need to replace the weight, making it difficult for flexible use. It's often Il.

(d)0発明の目的 本発明は、前述の欠点を解消ずへく、 荷重及び荷重の負荷速度の設定、変更を容易に行う乙と
が出来、しかも小型かつ軽量な硬さ試験機を提供するこ
とを目的とするものである。
(d) Object of the Invention The present invention does not eliminate the above-mentioned drawbacks, and provides a small and lightweight hardness testing machine that allows easy setting and changing of load and loading speed. The purpose is to

(e)0発明の構成 即ち、本発明は、上下方向に移動自在 に設けられた圧子支持体に圧子を装着し、前記圧子支持
体に荷重負荷源として電気的回転駆動手段を、前記回転
駆動手段の回転を減速し、かつその回転運動を直線運動
に変換する、運動方向変換・減速機構を介して接続し、
更に前記圧子から試料に負荷される荷重を検出する荷重
検出手段を設けて構成される。
(e) Configuration of the 0 invention, that is, the present invention is such that an indenter is attached to an indenter support provided to be movable in the vertical direction, and an electric rotation drive means is applied to the indenter support as a load source, and the rotation drive connected via a motion direction conversion/deceleration mechanism that decelerates the rotation of the means and converts the rotational motion into linear motion;
Furthermore, a load detection means for detecting the load applied to the sample from the indenter is provided.

(以下余白) (f)9発明の実施例 以下、図jlIiに基づき、本発明の実施例を、具体的
に説明する。
(The following is a blank space) (f) 9 Examples of the Invention Examples of the present invention will be specifically described below based on FIG. jlIi.

第1図は本発明による硬さ試験機の一 実施例を示す制御ブロック図、第2図は硬さ試験機によ
る荷重の負荷曲線の一例を示す図である。
FIG. 1 is a control block diagram showing an embodiment of a hardness tester according to the present invention, and FIG. 2 is a diagram showing an example of a load curve of the hardness tester.

硬さ試験機1は、第1図に示すように、テーブル2nの
設けられた本体2を有しており、本体2にはスピンドル
3が図中上下方向、即ち矢印A、B方向に移動駆動自在
に設けられている。スピンドル3の下端には圧子5が装
着されており、更にスピンドル3には、歪センサ9が装
着されている。
As shown in FIG. 1, the hardness tester 1 has a main body 2 provided with a table 2n, and the main body 2 has a spindle 3 that is driven to move in the vertical direction in the figure, that is, in the directions of arrows A and B. It is set freely. An indenter 5 is attached to the lower end of the spindle 3, and a strain sensor 9 is further attached to the spindle 3.

また、スピンドル3下端の圧子5の脇にはギャップセン
サ7が設けられており、歪センサ9及びギャップセンサ
7にはトランスデユーサ6.10が接続している。トラ
ンスデユーサ6.10にはA/D変換器11が接続して
おり、A/D変換器11にばマイクロコンピュータ等か
ら構成される主制御部12が接続している。主制御部1
2には、キーボード20、プログラムメモリ21及びデ
ィスプレイ22が接続しており、更にD/A変換器13
を介してモータ制御部15が接続している。モータ制御
部15にはDCサーボモータ16及びサーボモータ16
に接続して、サーボモータ16の回転角度量eを検出す
るタコジェネレータ17が接続している。また、サーボ
モータ16には、歯車、ラック、ピンオン等から構成さ
れ、モータ16の回転を減速し、かつその回転運動を直
線運動に変換する、運動方向変換・減速機構19を介し
て、スピンドル3が接続しており、従ってサーボモータ
16を正逆方向に回転駆動することによりスピンドル3
は図中上下方向に移動することが出来る。
Further, a gap sensor 7 is provided beside the indenter 5 at the lower end of the spindle 3, and a transducer 6.10 is connected to the strain sensor 9 and the gap sensor 7. An A/D converter 11 is connected to the transducer 6.10, and a main control section 12 composed of a microcomputer or the like is connected to the A/D converter 11. Main control part 1
A keyboard 20, a program memory 21, and a display 22 are connected to the 2, and a D/A converter 13 is also connected to the 2.
The motor control section 15 is connected via the. The motor control unit 15 includes a DC servo motor 16 and a servo motor 16.
A tacho generator 17 is connected to the servo motor 16 to detect the rotation angle amount e of the servo motor 16. The servo motor 16 is also connected to the spindle 3 through a motion direction conversion/deceleration mechanism 19, which is composed of gears, racks, pin-ons, etc., and which decelerates the rotation of the motor 16 and converts the rotational motion into linear motion. is connected, therefore, by rotating the servo motor 16 in the forward and reverse directions, the spindle 3
can move up and down in the figure.

硬さ試験機1は以上のような構成を有 するので、硬さ試験機1によりロックウェル硬さ試験を
行う場合には、まず硬さを測定すべき試料23をテーブ
ル2a上に置き、キーボルド20から主制御部12に、
硬さ試験に際して使用する試験プログラムEPRの番号
PNOを指令する。主制御部12は番号PNOからプロ
グラムメモリ21を検索して当該番号PNOに対応する
試験プログラムEPRを読み出し、そのプログラムE 
P Itに従って、E)/A変換器13、モータ制御部
15を介してサーボモータ16を駆動制御して所定の硬
さ試験を行う。即ち、プログラムメモリ21−には、荷
重量、荷重負荷速度に応じたサーボモータ16の制御パ
ターンが試験プログラムEPRとして格納され′(おり
、キーボード20から、試験すべき荷重量と荷重負荷速
度に対応した試験ゾ11グラムEPRのプログラム番号
f) N Oを人力することにより、主制御部12は直
ちに1]的の仕様の硬さ試験を行うことが出来る。
Since the hardness tester 1 has the above configuration, when performing a Rockwell hardness test using the hardness tester 1, first place the sample 23 whose hardness is to be measured on the table 2a, and then place the sample 23 on the keybold 20. to the main control unit 12,
Commands the number PNO of the test program EPR used in the hardness test. The main control unit 12 searches the program memory 21 from the number PNO, reads the test program EPR corresponding to the number PNO, and reads the test program EPR corresponding to the number PNO.
According to P It, the servo motor 16 is drive-controlled via the E)/A converter 13 and the motor control unit 15 to perform a predetermined hardness test. That is, the program memory 21- stores a control pattern for the servo motor 16 corresponding to the load amount and the load application speed as a test program EPR' (and the control pattern corresponding to the load amount and load application speed to be tested is stored from the keyboard 20). The main control unit 12 can immediately perform the hardness test according to the specification of 1] by manually inputting the program number f) NO of the test 11 grams EPR.

主制御部12は゛目的の試験プログラムE P Rを読
み出したところで、当該プログラムEPRに従って、既
に述べたように、モータfaJ 943部15等を介し
てサーボモータ16を駆動1Ijllf[lIする。サ
ーボモータ16が回転駆動されると運動方向変換・減速
機構19を介してスピンドル3が、第1図下方即ら矢印
入方向に降下し、圧子5の先端がテーブル2a上の試料
23に当接接触し、更に基準荷重Wlが試料23に負荷
されるまでスピンドル3は駆動される。即ち、試料23
に負荷される荷重はスピンドル3に装着された歪センサ
9により、スピンドル3に生じる歪として捕えられ、ト
ランスデユーサ6、A/D変換@11を介して主制御部
12に入力される。主制御部12はスピンドル3の歪量
から圧子5を介して試料23に負荷されている荷重を演
算し、荷重が基準荷重W1に達するまでスピンドル3を
入方向に下降させる。圧子5から試料23に付加される
荷重が基準荷重W1に達したところ゛C1主制御部12
はモータ制御部15+こ、第2図tと示すように、試験
プログラムE I) Itに基づいて、所定時間I゛1
ノ!け基準荷riWlを維持させる、荷重維持動作に入
ることを指令する。
After reading out the target test program EPR, the main control section 12 drives the servo motor 16 via the motor faJ943 section 15 and the like according to the program EPR, as described above. When the servo motor 16 is rotationally driven, the spindle 3 moves downward in FIG. The spindle 3 is driven until contact is made and the reference load Wl is further applied to the sample 23. That is, sample 23
The load applied to the spindle 3 is detected by a strain sensor 9 attached to the spindle 3 as strain generated in the spindle 3, and is input to the main control unit 12 via the transducer 6 and A/D conversion @11. The main control unit 12 calculates the load applied to the sample 23 via the indenter 5 from the amount of strain on the spindle 3, and lowers the spindle 3 in the entry direction until the load reaches the reference load W1. When the load applied from the indenter 5 to the sample 23 reaches the reference load W1, the C1 main control unit 12
is the motor control unit 15+, as shown in FIG.
of! command to enter a load maintenance operation to maintain the reference load riWl.

時間°1゛1の基準荷重W1の維持が行われtこところ
−C1主制御部12はプログラムE IJ ttに基づ
いて試験・荷重W2の負荷動作に入る乙とをモータ制御
部15に指令し、モータ制御部15はプログラムEPR
に示された(+”+j ilj負荷速度に従ってサーボ
モータ16を〜イ動11i1J N j、て所定の試験
荷重W2を試料23に負荷する。なお、荷重の負荷速度
は、トランスデユーサ6からの出力を(取分してその航
が所定の値になるように号−ボモータ16を駆動制御す
ることにより容易に調整することが出来る。
After the reference load W1 is maintained for a time of 1°1, the C1 main control unit 12 instructs the motor control unit 15 to enter the test/load operation of the load W2 based on the program E IJ tt. , the motor control unit 15 uses the program EPR
A predetermined test load W2 is applied to the sample 23 by moving the servo motor 16 to 11i1JNj according to the load speed shown in The output can be easily adjusted by controlling the drive motor 16 so that the output becomes a predetermined value.

こうして試験荷−重W2が、第2図に示すように、試料
23に負荷されたところで、主制御部12はプログラム
E P Itに示された時間T 2だけその試験荷重w
2を維持し、次いでサーボモータ16を逆転させる乙と
によりスピンドル3をB方向に上昇させ、圧子5から試
料への荷重を初期の基準荷重W1にまで戻す。
After the test load W2 has been applied to the sample 23 as shown in FIG.
2, and then the servo motor 16 is reversed (B) to raise the spindle 3 in the direction B, and the load from the indenter 5 to the sample is returned to the initial reference load W1.

なお、テーブル2a上の試料23には 圧子5による圧痕が残るが、スピンドル3にはスピンド
ル3と試料との間の距離を測定するギャップセンサ7が
装着されているので、スピンドル3のAXB方向の移動
量、従って、圧子5の試料23への圧入深さはトランス
デユーサ10.A/D変換膠11を介して主制御部12
により直ちに演算される。即ち、基準荷重w1を負荷し
、時間T Jだけ保持した時点におけるスピンドル3の
位置を基準原点ZPとして、試験荷重W2を負荷して時
間1゛2だけ保持し、更に再度基準筒MW1に戻した時
点におけるスピンドル3の位置を基準原点ZPに対して
めると、それがスピンドル3の入方向への移!tilt
、tIJ+ち試料231こおける圧痕の深さとなり、1
.jツクウェル硬きを表示することになる。こうしてめ
られた硬さく、1デイスプレイ22 J:に表示される
Incidentally, an indentation by the indenter 5 remains on the sample 23 on the table 2a, but since the spindle 3 is equipped with a gap sensor 7 that measures the distance between the spindle 3 and the sample, the AXB direction of the spindle 3 is The amount of movement, and therefore the depth of indentation of the indenter 5 into the sample 23, is determined by the transducer 10. Main control unit 12 via A/D conversion glue 11
It is calculated immediately by That is, the position of the spindle 3 at the time when the reference load w1 was applied and held for a time TJ was set as the reference origin ZP, the test load W2 was applied and held for a time 1゛2, and then it was returned to the reference tube MW1 again. If we set the position of the spindle 3 at that point in time with respect to the reference origin ZP, this is the movement of the spindle 3 in the entry direction! tilt
, tIJ + the depth of the indentation in sample 231, which is 1
.. j Tsukwell hardness will be displayed. The hardness determined in this way is displayed on the 1 display 22 J:.

硬さがめられると、スピンドル3は B方向に上5・lされ、圧子5は試料23上がら離れ、
当該試料23+ζ対する硬さ試験は終了する。
When the hardness is determined, the spindle 3 is moved upward in the direction B, and the indenter 5 is moved away from the top of the sample 23.
The hardness test for the sample 23+ζ is completed.

なお、上述の実施例は、本発明による 硬さ試験機1をロックウェル硬さ試験に用いtコ場合に
ついて述べたが、本発明は圧子5を、荷重負荷源として
のサーボモータ16等の電気的回転駆動手段により移動
駆動させるように構成する限り、どのような硬さ試験に
用いてもよいことは勿論である。
In the above embodiment, the hardness tester 1 according to the present invention was used for a Rockwell hardness test, but the present invention also provides an electric indenter 5 such as a servo motor 16 as a load source. Of course, it can be used for any hardness test as long as it is configured to be moved and driven by a rotational drive means.

即ち、ブリネル硬さ試験やビッカース硬さ試験等におけ
る圧子圧入用として用いることも可能である。
That is, it can also be used for indentation in Brinell hardness tests, Vickers hardness tests, etc.

(以下余白ン (g)0発明の効果 以上、説明したように、本発明によれ ば、上下方向に移動自在に設けられたスピンドル3等の
圧子支持体に圧子5を装着すると共に、圧子支持体に荷
重負荷源としてのサーボモータ16等の電気的回転駆動
手段を、前記回転駆動手段の回転を減速し、かつその回
転運動を直線運動に変換する、運動方向変換・減速機構
19を介して接続し、更に圧子5から試料23に負荷さ
れる荷重を検出する、歪センサ9、トランスデユーサ6
等の荷重検出手段を設けtこので、硬さ試験における荷
重及び荷重の負荷速度を回転駆動手段の回転量、回転速
度を制御することにより容易にかつ任意に設定すること
が可能となり、硬さ試験機1の機動的な使用が可能とな
る。
(Margin (g) below) Effects of the Invention As explained above, according to the present invention, the indenter 5 is attached to the indenter support such as the spindle 3 which is provided to be movable in the vertical direction, and the indenter support Electric rotational drive means such as a servo motor 16 as a source of load on the body is controlled via a motion direction conversion/deceleration mechanism 19 that decelerates the rotation of the rotational drive means and converts the rotational motion into linear motion. A strain sensor 9 and a transducer 6 are connected to each other and further detect the load applied to the sample 23 from the indenter 5.
With this, it is possible to easily and arbitrarily set the load and loading speed of the load in the hardness test by controlling the rotation amount and rotation speed of the rotation drive means, and the hardness Testing machine 1 can be used flexibly.

更に、電気的回転駆動手段を荷重負荷 源(手段)として使用したので、従来の重錘及びダッシ
ュポット、バネ等を用いた機織的な荷重負荷方式に比し
てはるかI?:軽量、小型化することが出来、取り扱し
)も容易に行うことが可能となる。
Furthermore, since electric rotation drive means is used as the load loading source (means), the load loading is much faster than the conventional weaving load loading method using weights, dashpots, springs, etc. : It can be made lighter, smaller, and easier to handle.

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

第1図は本発明による硬さ試験機の一 実施例を示す制御ブロック図、第2図(よ硬さ試験機に
よる荷重の負荷曲線の一例を示す図である。 1・・硬さ試験機′ 3・・・・圧子支持体(スピンドル) 5・・・・圧子 6・・・薄型検出手段 (トランスデユーサ) 9・・・・・・(1「重検出手段(歪センサ)16・・
電気的回転駆動手段 (サーボモータ) 19・・・・・・連動方向変換・減速機構23・・・試
料 出願人 西原 公 代理人 弁理士 相1)沖二二 手続補正書(方式) 特許庁長官 若杉和夫殿 1 事件の表示 昭和58年特許願第223879号 2 発明の名称 硬さ試験機 3 補正をする者 事件との関係 特許出願人 住所 千葉県鎌ケ谷市初富800 氏名(名称)西 原 公 4、代 理 人 住所 〒161 東京都新宿区下落合3丁目12番21
号6 補正の対象 明細書全文 7 補正の内容
FIG. 1 is a control block diagram showing an embodiment of the hardness tester according to the present invention, and FIG. 2 is a diagram showing an example of the load curve of the hardness tester. 1. Hardness tester ' 3... Indenter support (spindle) 5... Indenter 6... Thin detection means (transducer) 9... (1" Heavy detection means (strain sensor) 16...
Electric rotation drive means (servo motor) 19... Interlocking direction change/deceleration mechanism 23... Sample applicant Nishihara Public agent Patent attorney Phase 1) Oki 22 Procedures Amendment (Method) Commissioner of the Japan Patent Office Mr. Kazuo Wakasugi 1 Indication of the case Patent Application No. 223879 of 1983 2 Name of the invention Hardness tester 3 Relationship with the case by the person making the amendment Patent applicant address 800 Hatsutomi, Kamagaya City, Chiba Prefecture Name: Ko Nishihara 4 , Agent address: 3-12-21 Shimoai, Shinjuku-ku, Tokyo 161
Item 6 Full text of the specification subject to amendment 7 Contents of amendment

Claims (1)

【特許請求の範囲】 圧子を試料に圧入する乙とにより前 記試料の硬さを測定する硬さ試験機において、上下方向
に移動自在に設けられた圧子支持体に前記圧子を装着し
、前記圧子支持体に荷重負荷源としての電気的回転駆動
手段を、前記回転駆動手段の回転を減速し、かつその回
転運動を直線運動に変換する、運動方向変換・減速機構
を介して接続し、更に前記圧子から試料に負荷される荷
重を検出する荷重検出手段を設けて構成した硬さ試験機
[Scope of Claims] In a hardness tester that measures the hardness of a sample by pressing an indenter into the sample, the indenter is mounted on an indenter support provided vertically movably, and the indenter is inserted into the sample. An electric rotational drive means as a load source is connected to the support via a movement direction conversion/deceleration mechanism that decelerates the rotation of the rotational drive means and converts the rotational motion into linear motion, and further A hardness testing machine equipped with a load detection means to detect the load applied to the sample from the indenter.
JP22387983A 1983-11-28 1983-11-28 Hardness tester Pending JPS60114742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22387983A JPS60114742A (en) 1983-11-28 1983-11-28 Hardness tester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22387983A JPS60114742A (en) 1983-11-28 1983-11-28 Hardness tester

Publications (1)

Publication Number Publication Date
JPS60114742A true JPS60114742A (en) 1985-06-21

Family

ID=16805136

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22387983A Pending JPS60114742A (en) 1983-11-28 1983-11-28 Hardness tester

Country Status (1)

Country Link
JP (1) JPS60114742A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6212850U (en) * 1985-07-09 1987-01-26
JPS63118540U (en) * 1986-09-30 1988-08-01
JPH01114737A (en) * 1987-10-28 1989-05-08 Shimadzu Corp Material testing machine
JPH01114736A (en) * 1987-10-28 1989-05-08 Shimadzu Corp Material testing machine
JPH01209340A (en) * 1988-02-17 1989-08-23 Shimadzu Corp Material tester
JPH02208539A (en) * 1989-02-09 1990-08-20 Shimadzu Corp Indentation hardness test
KR100416723B1 (en) * 2002-04-04 2004-01-31 (주)프론틱스 Apparatus for determining residual stress, method for determining residual stress data using it, residual stress determining method using it and recording medium thereof
KR100669544B1 (en) 2005-10-27 2007-01-16 한국표준과학연구원 A multi-functional calibration device for brinell hardness tester and a calibration method by the said device
JP2021085835A (en) * 2019-11-29 2021-06-03 学校法人 関西大学 Indentation test system on process machine and indentation test method on process machine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6212850U (en) * 1985-07-09 1987-01-26
JPH051805Y2 (en) * 1985-07-09 1993-01-18
JPS63118540U (en) * 1986-09-30 1988-08-01
JPH01114737A (en) * 1987-10-28 1989-05-08 Shimadzu Corp Material testing machine
JPH01114736A (en) * 1987-10-28 1989-05-08 Shimadzu Corp Material testing machine
JPH01209340A (en) * 1988-02-17 1989-08-23 Shimadzu Corp Material tester
JPH02208539A (en) * 1989-02-09 1990-08-20 Shimadzu Corp Indentation hardness test
KR100416723B1 (en) * 2002-04-04 2004-01-31 (주)프론틱스 Apparatus for determining residual stress, method for determining residual stress data using it, residual stress determining method using it and recording medium thereof
KR100669544B1 (en) 2005-10-27 2007-01-16 한국표준과학연구원 A multi-functional calibration device for brinell hardness tester and a calibration method by the said device
JP2021085835A (en) * 2019-11-29 2021-06-03 学校法人 関西大学 Indentation test system on process machine and indentation test method on process machine

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