WO2013145111A1 - 硬さ試験機及び硬さ試験方法 - Google Patents
硬さ試験機及び硬さ試験方法 Download PDFInfo
- Publication number
- WO2013145111A1 WO2013145111A1 PCT/JP2012/057835 JP2012057835W WO2013145111A1 WO 2013145111 A1 WO2013145111 A1 WO 2013145111A1 JP 2012057835 W JP2012057835 W JP 2012057835W WO 2013145111 A1 WO2013145111 A1 WO 2013145111A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hardness
- initial test
- test force
- indenter
- test
- Prior art date
Links
Images
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
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
- G01N3/44—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid the indentors being put under a minor load and a subsequent major load, i.e. Rockwell system
Definitions
- the present invention relates to a hardness tester and a hardness test method for evaluating by pressing an indenter into a sample surface.
- Rockwell hardness is widely used as one of the scales representing material hardness. Rockwell hardness is determined by applying the initial test force to the sample, then adding the initial test force plus the additional test force, and returning to the initial test force again. This is a value calculated from the difference in indenter penetration depth.
- the initial test force is defined as 10 kgf
- the main test force is defined as three types: 60 kgf, 100 kgf, and 150 kgf.
- various proposals for improving the test accuracy have been conventionally made (see, for example, Patent Document 1).
- the present invention has been made based on such a problem, and an object of the present invention is to provide a hardness tester and a hardness test method capable of accurately measuring hardness without removing a surface layer.
- the hardness tester of the present invention applies an initial test force to the sample surface with an indenter, then adds the initial test force to the initial test force plus an additional test force, and then returns the initial test force to the front and rear.
- the hardness of the sample is evaluated from the difference in depth of the indenter in each initial test force.
- the pressing means pushes the indenter into the sample surface by applying force to the indenter, and the first test applied to the sample surface by the indenter
- Initial test force setting means that can be set by arbitrarily changing the force from the reference value
- depth detection means for detecting the depth of penetration of the indenter into the sample surface by the pressing means, and detection by this depth detection means
- the hardness calculation means for determining the test hardness of the sample based on the Rockwell hardness calculation formula from the difference of the indentation depth in the initial test force twice before and after the test, and the test hardness obtained by this hardness calculation means Change the initial test force from the reference value Is obtained by a correction means for correcting the deviation of the hardness due to.
- the initial test force is applied to the surface of the sample with an indenter, and then the initial test force is added with the additional test force, and then returned to the initial test force.
- the hardness of the sample is evaluated from the difference in depth of the indenter in each initial test force.
- the initial test force applied to the sample surface by the indenter is arbitrarily changed from the reference value and set, Obtain the test hardness of the sample based on the Rockwell hardness calculation formula from the difference in the indenter penetration depth in the test force, and the hardness deviation caused by changing the initial test force from the reference value for the obtained test hardness. It is to correct.
- the sample can be set by increasing the initial test force. Even if there is a layer other than the object to be measured, such as an oxide film, on the surface, when the initial test force is applied, the indenter can be pushed under the layer not to be measured. Therefore, it is not necessary to perform a process such as cutting the sample surface, and the hardness can be easily measured.
- the hardness deviation caused by changing the initial test force from the reference value is corrected, so that the hardness of the sample can be obtained with high accuracy.
- the initial test force is arbitrarily changed from the reference value, and then the initial test force is added to the initial test force plus the additional test force.
- FIG. 1 shows a configuration of a hardness tester 10 according to an embodiment of the present invention.
- the hardness tester 10 applies an initial test force to the surface of the sample by the indenter 11, and then adds the initial test force to the initial test force plus an additional test force, and then returns to the initial test force to restore the front and rear 2
- the hardness of the sample is evaluated from the difference in the indenter penetration depth in each initial test force. That is, it is a so-called Rockwell hardness tester.
- the hardness tester 10 includes, for example, a sample table 12 on which a sample M as a measurement object is placed, and an indenter 11 that presses the sample surface is disposed above the sample table 12.
- the indenter 11 is configured such that, for example, a force is applied by the pressing means 13 and the indenter 11 is pushed into the sample surface.
- the pressing means 13 includes, for example, a load shaft 13A provided to extend above the indenter 11, a housing 13B that supports the load shaft 13A, and a motor 13C that moves the housing 13B in the vertical direction. Yes.
- depth detection means 14 for detecting the depth of penetration of the indenter 11 into the sample surface by the pressing means 13 is disposed.
- the depth detection means 14 is constituted by a digital gauge, for example, and is arranged coaxially with the indenter 11.
- a hollow contact 15 is disposed around the indenter 11 so as to be movable in the vertical direction with respect to the housing 13B.
- the contact 15 is for holding the sample M and detecting the position of the sample surface.
- the contact 15 is provided with a detection body 16 with which the tip of the depth detection means 14 abuts.
- the hardness tester 10 includes, for example, a control / arithmetic unit 17 that controls the hardness tester 10 and performs computation.
- the control / calculation unit 17 is configured to change the initial test force applied to the sample surface by the indenter 11 arbitrarily from the reference value and to set the initial test force 17A twice before and after the detection by the depth detection unit 14.
- Hardness calculation means 17B for determining the test hardness of the sample M based on the Rockwell hardness calculation formula from the difference in the indentation depth of the indenter 11 at the initial test force.
- the reference value for the initial test force is 10 kgf.
- the initial test force setting means 17A is for setting the initial test force to a value different from the reference value of 10 kgf. Thereby, the pressing amount of the indenter 11 by the pressing means 13 is controlled.
- the control / calculation unit 17 also includes a correction unit 17C that corrects a deviation in hardness caused by changing the initial test force from the reference value for the test hardness obtained by the hardness calculation unit 17B.
- the correcting means 17C for example, adds the initial test force arbitrarily from the reference value for a plurality of reference pieces whose hardness is known in advance, and then adds the additional test force to the initial test force. Was added to the initial test force again, and the reference piece test hardness was obtained from the difference in indenter penetration depth between the first and second initial test forces using the Rockwell hardness calculation formula, and obtained for each initial test force.
- the test piece hardness is configured to be corrected based on the relationship between the reference piece test hardness and the known reference piece hardness.
- the initial test force is changed to 15 kgf, 20 kgf, 25 kgf, 30 kgf, 35 kgf, and 40 kgf
- the reference piece test hardness is obtained from the difference in indentation depth between the two initial test forces before and after, and obtained for each initial test force. It is preferable to obtain a relational expression between the obtained reference piece test hardness and the known reference piece hardness, and to correct the test hardness based on this relational expression.
- the hardness test method uses, for example, this hardness tester 10 to measure the hardness as follows.
- the initial test force is set by arbitrarily changing the initial test force from the reference value by the initial test force setting means 17A.
- the sample M is placed on the sample stage 12, the motor 13C is driven to move the housing 13B downward, and the contact 15 is brought into contact with the sample surface.
- the motor 13C is driven to move the housing 13B downward, the indenter 11 is pressed by the load shaft 13A, and an initial test force is applied to the sample surface by the indenter 11.
- the depth detection means 14 detects the penetration depth at which the indenter 11 is pushed into the sample surface.
- the motor 13C is driven to move the housing 13B downward, the indenter 11 is pressed by the load shaft 13A, and the indenter 11 adds the initial test force plus the additional test force to the sample surface. Thereafter, the motor 13C is driven to move the housing 13B upward, and the force applied to the sample surface by the indenter 11 is returned to the initial test force again.
- the depth detection means 14 detects the penetration depth at which the indenter 11 is pushed into the sample surface.
- the test force is determined by the scale and can be set arbitrarily.
- the test hardness of the sample M is obtained based on the Rockwell hardness calculation formula from the difference in the indenter penetration depth in the two initial test forces before and after, and the initial test force is changed from the reference value for the obtained test hardness.
- the initial test force is changed from the reference value
- the reference piece test hardness is obtained in the same manner as the test hardness of the sample M, and the initial test is performed. This is based on the relationship between the reference specimen test hardness obtained for each force and the known hardness of the reference specimen. Thereby, the hardness of the sample M is calculated
- the initial test force applied to the sample surface by the indenter 11 can be arbitrarily changed from the reference value, so that the initial test force can be increased to increase the oxide film on the sample surface. Even when there is a layer other than the measurement target such as, when the initial test force is applied, the indenter 11 can be pushed to the bottom of the layer other than the measurement target. Therefore, it is not necessary to perform a process such as cutting the sample surface, and the hardness can be easily measured. In addition, with respect to the obtained test hardness, the hardness deviation due to changing the initial test force from the reference value is corrected, so that the hardness of the sample M can be obtained with high accuracy.
- the initial test force was changed from the reference value, and the reference piece test hardness was obtained in the same manner as the sample M, and obtained for each initial test force. If the test hardness of the sample M is corrected based on the relationship between the reference piece test hardness and the known hardness of the reference piece, the sample M can be corrected with high accuracy.
- the initial test force was changed to obtain the reference piece test hardness. Specifically, the initial test force is applied to the reference piece, then the initial test force plus the additional test force is added, and then returned to the initial test force again. The indenter enters the initial test force twice before and after.
- the reference specimen test hardness was determined from the depth difference by the Rockwell hardness formula.
- the reference pieces were used for 10 types of Rockwell hardness HRC20, HRC25, HRC30, HRC35, HRC40, HRC45, HRC50, HRC55, HRC60, and HRC65.
- the initial test force was increased by 5 kgf from the standard value of 10 kgf and changed to 15 kgf, 20 kgf, 25 kgf, 30 kgf, 35 kgf, and 40 kgf, and the standard piece hardness was determined for each.
- HRC is the Rockwell C scale hardness
- h is the difference in indenter penetration depth in the first and second initial test forces.
- the reference piece test hardness was measured at five locations for one reference piece, and the average was obtained. Table 1 shows the obtained reference piece test hardness.
- test hardness was obtained by changing the initial test force with the hardness tester 10 described above. Specifically, the initial test force is applied to the sample M, then the initial test force plus the additional test force is added, and then the initial test force is returned to the initial test force. The test hardness was calculated from the depth difference by the Rockwell hardness calculation formula.
- the initial test force was changed to 15 kgf, 20 kgf, 25 kgf, 30 kgf, 35 kgf, and 40 kgf, and the test hardness was determined for each.
- the test hardness was measured at five locations for one sample M, and the average was obtained.
- the initial test force was set to 10 kgf as a reference value for the sample M whose surface was polished and the oxide layer was removed, and the sample M which was not polished and the oxide layer was left as it was. Otherwise, the test hardness was determined in the same manner as in this example. No correction was made. As a result, the test hardness when the surface was polished was 44.90, and the test hardness when the surface was not polished was 38.0.
- the hardness value obtained by the correction is in the range of 44.14 to 45.34, and the same result as that obtained when the surface was polished was obtained. That is, according to the present Example, it turned out that hardness can be measured easily and accurately.
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
Description
Claims (4)
- 圧子により試料表面に初試験力を加え、次に、初試験力に追加試験力を足した本試験力を加え、再び初試験力に戻すことにより、前後2回の初試験力における圧子進入深さの差から試料の硬さを評価する硬さ試験機であって、
前記圧子に力を加えることにより試料表面に前記圧子を押し込む押圧手段と、
前記圧子により試料表面に加える初試験力を基準値から任意に変えて設定可能とする初試験力設定手段と、
前記押圧手段により前記圧子が試料表面に押し込まれた進入深さを検出する深さ検出手段と、
この深さ検出手段により検出した前後2回の初試験力における前記圧子の進入深さの差からロックウェル硬さ演算式に基づき試料の試験硬さを求める硬さ演算手段と、
この硬さ演算手段により求めた試験硬さについて、初試験力を基準値から変えたことによる硬さのずれを補正する補正手段と
を備えたことを特徴とする硬さ試験機。 - 前記補正手段は、予め、硬さが分かっている複数の基準片について、初試験力を基準値から任意に変えて加え、次に、初試験力に追加試験力を足した本試験力を加え、再び初試験力に戻し、前後2回の初試験力における圧子進入深さの差からロックウェル硬さ演算式により基準片試験硬さを求めておき、初試験力毎に得られた基準片試験硬さと分かっている基準片の硬さとの関係に基づき、試料の試験硬さを補正する
ことを特徴とする請求項1記載の硬さ試験機。 - 圧子により試料表面に初試験力を加え、次に、初試験力に追加試験力を足した本試験力を加え、再び初試験力に戻すことにより、前後2回の初試験力における圧子進入深さの差から試料の硬さを評価する硬さ試験方法であって、
圧子により試料表面に加える初試験力を基準値から任意に変えて設定し、前後2回の初試験力における圧子進入深さの差から、ロックウェル硬さ演算式に基づき試料の試験硬さを求め、求めた試験硬さについて、初試験力を基準値から変えたことによる硬さのずれを補正することを特徴とする硬さ試験方法。 - 前記補正は、予め、硬さが分かっている複数の基準片について、初試験力を基準値から任意に変えて加え、次に、初試験力に追加試験力を足した本試験力を加え、再び初試験力に戻し、前後2回の初試験力における圧子進入深さの差からロックウェル硬さ演算式により基準片試験硬さを求めておき、初試験力毎に得られた基準片試験硬さと分かっている基準片の硬さとの関係に基づき行うことを特徴とする請求項3記載の硬さ試験方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2012/057835 WO2013145111A1 (ja) | 2012-03-26 | 2012-03-26 | 硬さ試験機及び硬さ試験方法 |
US13/808,514 US20130247645A1 (en) | 2012-03-26 | 2012-03-26 | Hardness tester and hardness testing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2012/057835 WO2013145111A1 (ja) | 2012-03-26 | 2012-03-26 | 硬さ試験機及び硬さ試験方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013145111A1 true WO2013145111A1 (ja) | 2013-10-03 |
Family
ID=49210528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/057835 WO2013145111A1 (ja) | 2012-03-26 | 2012-03-26 | 硬さ試験機及び硬さ試験方法 |
Country Status (2)
Country | Link |
---|---|
US (1) | US20130247645A1 (ja) |
WO (1) | WO2013145111A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10001433B2 (en) * | 2014-12-19 | 2018-06-19 | Halliburton Energy Services, Inc. | Method for rockwell hardness testing of tubulars post wellbore installation |
AT517833B1 (de) * | 2015-11-25 | 2017-05-15 | EMCO-TEST Prüfmaschinen GmbH | Vorrichtung zur erzeugung eines eindruckes in einem prüfobjekt für eine härteprüfung |
US10969317B2 (en) * | 2018-08-14 | 2021-04-06 | X Development Llc | Hardness testing system using multiple depth measurements and related methods |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6431034A (en) * | 1987-07-28 | 1989-02-01 | Shimadzu Corp | Indentation hardness testing method |
JPH06347389A (ja) * | 1993-06-04 | 1994-12-22 | Akashi:Kk | ロックウエル試験機における誤差補正方法 |
JPH11295202A (ja) * | 1998-04-06 | 1999-10-29 | Akashi Corp | ロックウェル硬さ試験機用校正ユニットと校正システム |
JP2000019089A (ja) * | 1998-07-03 | 2000-01-21 | Akashi Corp | 硬さ試験機用校正装置の校正方法 |
JP2003035645A (ja) * | 2001-07-25 | 2003-02-07 | Akashi Corp | ロックウェル硬さ試験機及びロックウェル硬さ試験方法 |
JP2009047427A (ja) * | 2007-08-13 | 2009-03-05 | Mitsutoyo Corp | 押込み試験機における試験管理方法及び押込み試験機 |
JP2009139283A (ja) * | 2007-12-07 | 2009-06-25 | Mitsutoyo Corp | 硬さ試験機及び硬さ試験機の校正方法 |
Family Cites Families (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3657921A (en) * | 1969-12-31 | 1972-04-25 | American Chain & Cable Co | Method and apparatus for testing the hardness of materials |
FR2165164A5 (ja) * | 1971-12-21 | 1973-08-03 | Skf Cie Applic Mecanique | |
DD114459A5 (ja) * | 1973-06-26 | 1975-08-05 | ||
JPS5093687A (ja) * | 1973-12-20 | 1975-07-25 | ||
DE2617256A1 (de) * | 1976-04-20 | 1978-03-09 | Theodor Prof Dr Ing Stoeferle | Vorrichtung zur kontinuierlichen haertepruefung |
US4118975A (en) * | 1976-12-16 | 1978-10-10 | Kabushiki Kaisha Akashi Seisakusho | Loading shaft positioning apparatus for hardness tester |
US4036048A (en) * | 1977-01-21 | 1977-07-19 | Webster Robert A | Hardness testing device |
US4535623A (en) * | 1983-02-11 | 1985-08-20 | Paul Gilberto | Material hardness testing apparatus |
US4691559A (en) * | 1985-02-07 | 1987-09-08 | Helmut Fischer | Device for measuring the properties of solid materials which can be derived from the behavior of a penetrating body |
US4852397A (en) * | 1988-01-15 | 1989-08-01 | Haggag Fahmy M | Field indentation microprobe for structural integrity evaluation |
IT1247645B (it) * | 1990-10-24 | 1994-12-28 | Alfred Ernst | Durometro e metodo di misura della durezza di materiali metallici |
US5490416A (en) * | 1994-11-04 | 1996-02-13 | The United States Of America As Represented By The Secretary Of The Interior | Method of determining elastic and plastic mechanical properties of ceramic materials using spherical indenters |
US5616857A (en) * | 1996-01-25 | 1997-04-01 | Instron Corporation | Penetration hardness tester |
US6134954A (en) * | 1996-04-15 | 2000-10-24 | Massachusetts Institute Of Technology | Depth sensing indentation and methodology for mechanical property measurements |
US6155104A (en) * | 1998-05-26 | 2000-12-05 | Subra Suresh | Method and apparatus for determining preexisting stresses based on indentation or other mechanical probing of a material |
US6336359B1 (en) * | 1999-02-17 | 2002-01-08 | Akashi Corporation | Impression forming mechanism and hardness testing apparatus |
JP3702203B2 (ja) * | 2001-01-12 | 2005-10-05 | ドンイル,クォン | 連続圧入試験のための圧入試験機、これを用いた物性測定方法及び物性計算方法 |
KR100418700B1 (ko) * | 2001-07-23 | 2004-02-11 | 이형일 | 유한요소해에 기초한 물성평가 구형 압입시험기 |
US6883367B2 (en) * | 2001-11-20 | 2005-04-26 | The University Of Hong Kong | Method for measuring elastic properties |
US6752012B2 (en) * | 2002-01-31 | 2004-06-22 | Texas Instruments Incorporated | Combined electrical test and mechanical test system for thin film characterization |
US6516655B1 (en) * | 2002-03-01 | 2003-02-11 | Honda Giken Kogyo Kabushiki Kaisha | Device and method for testing sheet metal deformation |
US6725708B2 (en) * | 2002-09-13 | 2004-04-27 | Akashi Corporation | Impression forming mechanism and method, and hardness testing apparatus and method |
US7121136B2 (en) * | 2002-12-25 | 2006-10-17 | Mitutoyo Corporation | Hardness testing apparatus |
WO2005031314A1 (en) * | 2003-09-26 | 2005-04-07 | C.I.S.A.M. S.A.S. Di A Ernst E C. | Hardness tester with a loading structure of the indenter independent of the stress frame connecting the indenter to the anvil |
US7149634B2 (en) * | 2004-01-14 | 2006-12-12 | The Hong Kong Polytechnic University | Method of determining elastic modulus |
JP4320018B2 (ja) * | 2006-01-06 | 2009-08-26 | 株式会社レニアス | 微小硬度測定法及び微小硬度計 |
JP5017081B2 (ja) * | 2007-12-26 | 2012-09-05 | 株式会社ミツトヨ | 押込み試験機及び押込み試験方法 |
US8265884B2 (en) * | 2008-07-29 | 2012-09-11 | President And Fellows Of Harvard College | Method to measure the elastic modulus and hardness of thin film on substrate by nanoindentation |
US8132447B2 (en) * | 2009-12-09 | 2012-03-13 | Shaoming Wu | Universal testing machine |
JP2011145190A (ja) * | 2010-01-15 | 2011-07-28 | Mitsutoyo Corp | 硬さ試験方法、硬さ試験機、及びプログラム |
JP2012078306A (ja) * | 2010-10-06 | 2012-04-19 | Mitsutoyo Corp | 硬さ試験機 |
JP5501189B2 (ja) * | 2010-10-06 | 2014-05-21 | 株式会社ミツトヨ | 硬さ試験機 |
-
2012
- 2012-03-26 US US13/808,514 patent/US20130247645A1/en not_active Abandoned
- 2012-03-26 WO PCT/JP2012/057835 patent/WO2013145111A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6431034A (en) * | 1987-07-28 | 1989-02-01 | Shimadzu Corp | Indentation hardness testing method |
JPH06347389A (ja) * | 1993-06-04 | 1994-12-22 | Akashi:Kk | ロックウエル試験機における誤差補正方法 |
JPH11295202A (ja) * | 1998-04-06 | 1999-10-29 | Akashi Corp | ロックウェル硬さ試験機用校正ユニットと校正システム |
JP2000019089A (ja) * | 1998-07-03 | 2000-01-21 | Akashi Corp | 硬さ試験機用校正装置の校正方法 |
JP2003035645A (ja) * | 2001-07-25 | 2003-02-07 | Akashi Corp | ロックウェル硬さ試験機及びロックウェル硬さ試験方法 |
JP2009047427A (ja) * | 2007-08-13 | 2009-03-05 | Mitsutoyo Corp | 押込み試験機における試験管理方法及び押込み試験機 |
JP2009139283A (ja) * | 2007-12-07 | 2009-06-25 | Mitsutoyo Corp | 硬さ試験機及び硬さ試験機の校正方法 |
Also Published As
Publication number | Publication date |
---|---|
US20130247645A1 (en) | 2013-09-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5017081B2 (ja) | 押込み試験機及び押込み試験方法 | |
JP4958754B2 (ja) | 硬さ試験機及び硬さ試験機の校正方法 | |
WO2013145111A1 (ja) | 硬さ試験機及び硬さ試験方法 | |
KR101622869B1 (ko) | 구름 저항 시험기에 구비된 다분력 검출기의 교정 방법 | |
JP6023598B2 (ja) | 研削加工方法 | |
JP2009524011A (ja) | 部品の自重を取得して可撓性部品の輪郭のズレを取得する装置およびその方法 | |
JP2019514024A5 (ja) | 補償型機械試験システムおよび方法 | |
CN106536177A (zh) | 控制系统、压力机及压力机的控制方法 | |
US20180202112A1 (en) | Determining strength of wood fiberboard | |
SG162833A1 (en) | Method for determining initial burnishing parameters | |
US8839671B2 (en) | Measurement method and measurement device | |
KR20110092032A (ko) | 금속봉 가공 장치 | |
JPWO2013145111A1 (ja) | 硬さ試験機及び硬さ試験方法 | |
JP6890148B2 (ja) | プレス機械のプレス荷重測定装置及び方法 | |
MX2019010918A (es) | Metodo para estimar la dureza de un componente trabajado en frio y metodo para adquirir la curva de dureza en funcion de la deformacion plastica equivalente del material de acero. | |
CN102507435A (zh) | 摩擦系数测量方法 | |
CN202195993U (zh) | 一种硬度检测装置 | |
JP2008122164A (ja) | シングルセンサー式押込み試験システム | |
ES2933050T3 (es) | Procedimiento de prensado con compensación de errores de posicionamiento durante un proceso de prensado y prensa para la realización de tal procedimiento | |
JP2018009816A (ja) | タイヤ剛性試験方法 | |
JP2007178266A (ja) | 圧子軸膨張量推定機構及び材料試験機 | |
JP5681528B2 (ja) | 曲げ加工装置 | |
JP2004340657A (ja) | 圧痕形成機構及び硬さ試験機 | |
JP6347201B2 (ja) | 摩擦係数測定装置及び方法 | |
JP6894951B2 (ja) | 曲げ加工方法及び曲げ加工システム |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2012515273 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13808514 Country of ref document: US |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12873022 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12873022 Country of ref document: EP Kind code of ref document: A1 |