CN106990008A - The special calibrating instrument of Rockwell apparatus Direct Test method - Google Patents
The special calibrating instrument of Rockwell apparatus Direct Test method Download PDFInfo
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- CN106990008A CN106990008A CN201710135528.3A CN201710135528A CN106990008A CN 106990008 A CN106990008 A CN 106990008A CN 201710135528 A CN201710135528 A CN 201710135528A CN 106990008 A CN106990008 A CN 106990008A
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0098—Tests specified by its name, e.g. Charpy, Brinnel, Mullen
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Abstract
The special calibrating instrument of Rockwell apparatus Direct Test method, is mainly used to examine the test force and the error of impression sounding gear indicating value of metal Rockwell apparatus and plastics Rockwell apparatus, it includes：Gland, elastomer, dial framework, lever, measuring staff, spring, A measurement points, B measurement points, displacement transducer, support, base etc..It is characterized in that：It is by the standard dynamometer of Direct Test law regulation and the design of sounding gear calibrating instrument on an instrument, and it is provided with two measurement points：A points examine force value, and B point proof depth values, the degree of accuracy meets national standard GB/T230.2 2012, GB/T3398.2 2008 and JJG112 2013 technical requirements, and the ISO 6,508 2 that meets international standards：2005 technical requirements, realize it is in line with international standards, solve fail over more than 60 years implement Direct Test method problem, it can also examine the force value of Vickers and underload Brinell hardness tester, and structure is novel, and cost performance is high, and a large amount of standards block of hardness can be saved, beneficial to energy-conserving and environment-protective.
Description
Technical field
It is a kind of special calibrating of Rockwell apparatus Direct Test method the invention belongs to metrological testing technology instrument field
Instrument, be mainly used to examine metal Rockwell apparatus, metal surface Rockwell apparatus, the error of plastics Rockwell apparatus test force and
The error of impression sounding gear indicating value.
Background technology
According to national standard GB/T230.2-2012《Metallic rockwell hardness test part 2：Hardometer (A, B, C, D, E, F, G,
H, K, N, T scale) inspection and calibration》, national metrological verification regulations JJG112-2013《Metal Rockwell apparatus》(A、B、C、
D, E, F, G, H, K, N, T scale), national standard GB/T3398.2-2008《Plastics Rockwell apparatus》With international standard ISO 6508-2：
2005《Metal material Rockwell hardness test part 2：The inspection of hardometer (A, B, C, D, E, F, G, H, K, N, T scale) and school
It is accurate》, above-mentioned 4 standard clear stipulaties inspection Rockwell apparatus basic function has two kinds of methods of inspection：Direct Test method and
Connect method of inspection.
Above-mentioned standard provides that Direct Test method is to use standard dynamometer to examine the error of hardometer test force, test force most
Big allowable error is ± 1%, and the error of hardometer impression sounding gear indicating value is examined and determine using sounding gear calibrating instrument, and A~K is marked
The chi limits of error are ± 0.001mm, are ± 0.0005mm to N, T scale limits of error, that is, are 0.5HR.
The technical indicator of national Specification standard dynamometer should meet GB/T13634-2012《Single axis test machines, which are examined, to be used
The calibration of standard dynamometer》1 grade in standard, and the technical indicator of sounding gear calibrating instrument should meet national standard GB/T230.2-
Uncertainty specified in 2012 standards is 0.0002mm (k=2), range 0.22mm.
Country in international standard with also indicating：, can be by making if can not directly be examined and determine depth of cup measurement apparatus
Examined indirectly with standard block of hardness, indirect checking method be by using standard block of hardness and standard indenter as defined in standard
Method is examined and determine hardometer indicating value, and its error of indication absolute value should be not more than 0.8HR, and this is inspection party general at present
Method.
Current China or even external metrological service to Rockwell apparatus, including：Metal Rockwell apparatus, metal surface Rockwell
Hardometer and plastics Rockwell apparatus, have failed to implement Direct Test method since over half a century, so that today is still also using mark
The indirect checking method that quasi- block of hardness is substituted, its main cause is not meet standard specification, practical Rockwell apparatus
The standard test device of Direct Test method.
In addition, according to China JJG112-2013《Metal Rockwell apparatus》(A, B, C, D, E, F, G, H, K, N, T scale) is examined
Journey of establishing rules regulation, the standard dynamometer of check test power uses JJG144-2009《Standard dynamometer》0.3 grade in standard, by
It is less than 1 grade in GB/T13634-2012 standards in the technical requirement of this 0.3 grade of standard dynamometer, although it meets me
State vertification regulation JJG122-2013 technical requirements, but technical requirements as defined in national standard GB/T230.2-2012 are not met, also not
Meet international standard ISO6508.2：Technical requirements as defined in 2005, therefore can not realize in line with international standards.
At present both at home and abroad also without it is a kind of meet country and international standard technical requirements, can on same instrument, it
The error of Rockwell apparatus test force can be examined and determine, the Rockwell apparatus that the impression sounding gear error of indication can be examined and determine again is directly examined
Test method inspection and special determine instrument.
Indirect checking method a further disadvantage is that：Consumption it is a large amount of it is being manufactured with superior alloy steel and by complicated technology, press
National standard assay approval, different hardness value standard block of hardness, is unfavorable for energy-conserving and environment-protective.
The content of the invention
The invention aims to solve the deficiencies in the prior art, in order to hard to Rockwell apparatus, including metal Rockwell
Degree meter, metal surface Rockwell apparatus and plastics Rockwell apparatus, carry out Direct Test method, design a kind of Rockwell apparatus direct
The special calibrating instrument of method of inspection, it can examine the error of Rockwell apparatus test force, and impression sounding gear indicating value can be examined again
Error, unites two into one the calibrating project of two Direct Test law regulations, designs on an instrument, it is used as standard dynamometer
Or the degree of accuracy of sounding gear calibrating instrument, national standard GB/T230.2-2012, GB/T3398.2-2008, JJG112- all should be met
2013 and international standard ISO6508-2：2005 technical requirements, realize in line with international standards, and should have cost performance high, indicating value is steady
Fixed, easy to operate, shape corpusculum is light, it is easy to promote.
Realize that the purpose of the present invention is adopted the technical scheme that, a kind of special calibrating of Rockwell apparatus Direct Test method
Instrument, it designs the standard dynamometer of Direct Test law regulation and sounding gear calibrating instrument on same instrument, it is characterized in that：
Both it can be used for the test force for examining Rockwell apparatus, the indicating value for examining impression sounding gear can be used for again, it includes：Gland 1,
Steel ball 2, elastomer 3, lever shaft 4, gage button 5, lever stage clip 6, measuring staff stage clip 7, measuring staff 8, support 9, upper contact 10, lever 11, A
Measurement point 12, displacement transducer 13, B measurement points 14, dial framework 15, base 16, locating shaft 17.
The annexation of above-mentioned parts is：The gland 1 is fixed together with the steel ball 2, is placed in the elasticity
In the ball impression at the central shaft upper surface center of body 3；The elastomer 3 is in annular, and central shaft upper end planar central has placement institute
The ball impression of steel ball 2 is stated, there is the screw for installing the base 16 at central shaft lower end plane center；The lever shaft 4 and the lever
11 are connected, and are arranged on by bearing on the support 9；The lever stage clip 6 be arranged on the support 9 and the lever 11 it
Between；The measuring staff stage clip 7 is sleeved on the measuring staff 8, and the measuring staff 8 is arranged in the screw on the support 9, the measuring staff
8 top and the gage button 5 on the lever 11 are corresponding coaxial；The support 9 is fixed on the center of elastomer 3
On the right flank of axle lower end；The lever 11 is a kind of lever for bending to square, and the upper contact 10 is arranged on the thick stick
On the galianconism of bar 11, the upper contact 10 is in the presence of the lever stage clip 5, with table in the central shaft top of elastomer 3
Face is in close contact；Install and installed in the A measurement points 12 and B measurement points 14, right flank on the long-armed left surface of the lever 11
The gage button 5；Institute's displacement sensors 13 are arranged on the dial framework 15, there is two measured holes on the dial framework 15：A measured holes
With B measured holes, the A measured holes and B measured holes and 14 pairs of the A measurement points 12 and the B measurement points on the lever 11
Should be coaxial；Institute's displacement sensors 13 are arranged on fixed in the A measured holes of the dial framework 15 or B measured holes, the displacement
The gauge head plane of sensor 13 is in close contact with the A measurement points 12 or B measurement points 14；The dial framework 15 is fixed on the elasticity
On the left surface of the central shaft lower end of body 3；The base 16 is threadedly coupled with the center of the lower plane of elastomer 3, the base
There is screw at 16 lower plane centers, for installing the locating shaft 17.
The upper contact 10 and the lever ratio of the A measurement points 12 on the lever 11 are：2: 1, with the B measurement points
14 lever ratio is 5: 1.
During as standard dynamometer check test power, it is provided with two ranges of size, when inspection metal Rockwell hardness and modeling
When expecting the test force of Rockwell hardness, using wide range：Institute's displacement sensors 13 are arranged on the A measurements on the dial framework 15
Kong Zhong, dynamometry scope：500N-2500N, when examining the test force of surface rockwell hardness, using small-range：The displacement sensing
Device 13 is arranged in the B measured holes on the dial framework 15, dynamometry scope：100N-500N, is used as the accurate of standard dynamometer
Degree should meet 1 grade in GB/T13634-2012 standards, equally meet ISO6508-2：1 grade in 2005 standards.
When carrying out the value testing of depth of cup measurement apparatus as sounding gear calibrating instrument, institute's displacement sensors 13 are pacified
Carried out in the B measured holes on the dial framework 15, should meet GB/ as the technical requirements of sounding gear calibrating instrument
Uncertainty as defined in T230.2-2012 standards is 0.0002mm (k=2), range 0.22mm.
The A measurement points (12) can share institute's displacement sensors 13, institute's displacement sensors with B measurement points (14)
13 uncertainty is not less than 0.001mm, and institute's displacement sensors 13 have output interface, can be connected with computer at progress data
Reason and result printing.
Due to the present invention by two of Direct Test method calibrating projects combos together, its beneficial effect is embodied in：
1, cost performance is high, can check test power error, the error of impression sounding gear indicating value can be examined again；
2, the degree of accuracy of calibrating instrument meets international standard, realizes in line with international standards；
3, dynamometry can cover all experiment force value of Rockwell hardness provided with two ranges, and two, a top dynamometer is used.
4, shape corpusculum is light, the long wide 150mm of 110mm high 150mm, net weight 1kg, it is easy to carry；
5, thus, it is possible to save a large amount of standards block of hardness, be conducive to energy-conserving and environment-protective.
Brief description of the drawings
Accompanying drawing 1 is schematic structural view of the invention, and accompanying drawing 2 is the front view of the present invention.
In figure：1 gland, 2 steel balls, 3 elastomers, 4 lever shafts, 5 gage buttons, 6 lever stage clips, 7 measuring staff stage clips, 8 measuring staffs, 9
Frame, 10 upper contacts, 11 levers, 12A measurement points, 13 displacement transducers, 14B measurement points, 15 dial frameworks, 16 bases, 17 locating shafts.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
The special calibrating instrument of Rockwell apparatus Direct Test method, it is by standard dynamometer and the design of sounding gear calibrating instrument same
On one instrument, it is characterized in that：Both it can be used for the test force for examining Rockwell apparatus, can be used for examining impression sounding gear again
Indicating value, it includes：Gland 1, steel ball 2, elastomer 3, lever shaft 4, gage button 5, lever stage clip 6, measuring staff stage clip 7, measuring staff 8, branch
Frame 9, upper contact 10, lever 11, A measurement points 12, displacement transducer 13, B measurement points 14, dial framework 15, base 16, locating shaft 17.
The annexation of above-mentioned part is that the gland 1 is fixed together with the steel ball 2, is placed in the elastomer 3
In the ball impression at central shaft upper surface center；The elastomer 3 is in annular, and central shaft upper end planar central has the placement steel
There is the screw for installing the base 16 at the ball impression of ball 2, central shaft lower end plane center；The lever shaft 4 is consolidated with the lever 11
Even, and by bearing it is arranged on the support 9；The lever stage clip 6 is arranged between the support 9 and the lever 11；
The measuring staff stage clip 7 is sleeved on the measuring staff 8, the measuring staff 8 be arranged on the support 9 on screw in, the measuring staff 8 with
The correspondence of the gage button 5 on the lever 11 is coaxial；The support 9 is fixed on the central shaft lower end of elastomer 3
On right flank；The lever 11 is a kind of lever for bending to square, and the upper contact 10 is arranged on the short of the lever 11
On arm, the upper contact 10 closely connects in the presence of the lever stage clip 5 with the central shaft upper inside surface of elastomer 3
Touch；Installed on the long-armed left surface of the lever 11 on the A measurement points 12 and B measurement points 14, right flank and the gage button is installed
5；Institute's displacement sensors 13 are arranged on the dial framework 15, there is two measured holes on the dial framework 15：A measured holes and B measurements
Hole, the A measured holes and B measured holes and the A measurement points 12 and the B measurement points 14 on the lever 11 are corresponding coaxial；
Institute's displacement sensors 13 are arranged on fixed in the A measured holes of the dial framework 15 or B measured holes, institute's displacement sensors 13
Gauge head plane be in close contact with the A measurement points 12 or B measurement points 14；The dial framework 15 is fixed on the center of elastomer 3
On the left surface of axle lower end；The base 16 and the threaded connection at the lower plane center of elastomer 3, the lower plane of base 16
There is screw at center, for installing the locating shaft 17.
The upper contact 10 and the lever ratio of the A measurement points 12 on the lever 11 are：2: 1, with the B measurement points
14 lever ratio is 5: 1.
During as standard dynamometer check test power, it is provided with two ranges of size, when inspection Rockwell apparatus and plastics
During the force value of Rockwell apparatus, using wide range：Institute's displacement sensors 13 are arranged on the A measured holes on the dial framework 15
In, dynamometry model 500N-2500N, when examining the test force of superficial Rockwell hardness tester, using small-range：The sensor 13 is installed
In the B measured holes, measurement range：100N-500N, should meet GB/T13634-2012 as the degree of accuracy of standard dynamometer
1 grade in standard, equally meet ISO6508-2：1 grade in 2005 standards.
When the indicating value for carrying out depth of cup measurement apparatus as sounding gear calibrating instrument is examined, institute's displacement sensors 13 are pacified
Carried out in the B measured holes on the dial framework 15, should meet national standard GB/ as the uncertainty of sounding gear calibrating instrument
As defined in T230.2-2012：0.0002mm (k=2), range 0.22mm.
The A measurement points (12) can share institute's displacement sensors 13 with the B measurement points (14), and the displacement is passed
The uncertainty of sensor 13 is not less than 0.001mm, and has output interface, and progress data processing can be connected with computer and result is beaten
Print.
Operating procedure of the invention as standard dynamometer certificate test power：Selection institute displacement sensors 13 exist before examining
Installation site on the dial framework 15：Examine the test force of metal Rockwell apparatus and plastics Rockwell apparatus：588.4N、
980.7N、1471.1N；When, institute's displacement sensors 13 were arranged in the A measured holes, examined the experiment of superficial Rockwell hardness tester
Power：147.1N、294.2N、441.3N；When by institute's displacement sensors 13 be arranged on the B measured holes in, the measuring staff 8 is moved back
The surface of the gage button 5 is left on the top for being back to the measuring staff 8, and maintains a certain distance.First by penetrator during inspection
With test stand removal, by base 16 of the present invention, hardometer test stand position is placed in by the locating shaft 17, by the displacement
Sensor 13 is adjusted to be set to after original position " 0 ", and rising hardometer test stand makes penetrator axle and the center of gland 1
Contact, application is given after test force, then adds master trip power, and total test force is that tested test force is acted on gland 1, and pressure is given at full capacity
Examined and determine after 3 times, tested test force passes to the elastomer 3, work of the elastomer 3 in stress by the steel ball 2
Strain is produced with lower, dependent variable promotes institute's displacement sensors 13 by lever amplification, and the display of institute's displacement sensors 13 is tested
Test the verification result of force value.In the dynamometry scope of the A measured holes：500N-2500N.Including Rockwell HR (A, B, C, D,
E, F, G, H, K) experiment force value and plastics Rockwell apparatus (HRE, HRL, HRC, HRM, HRR) experiment force value：588.4N、
980.7N、1471.1N；In the dynamometry scope of the B measured holes：100N-500N, including superficial Rockwell HR (N, T) examination
Test force value：147.1N、294.2N、441.3N.In addition, A measurement points can also examine and determine Brinell hardness HB experiment force value：612.9N、
1226N、1838.8N、2452N；B measurement points can also examine the experiment force value of vickers hardness hv：98.07N、196.1N、294.2N
With the force value of underload Brinell hardness：153.2N、306.5N.
The present invention examines and determine the operating procedure of impression sounding gear indicating value as sounding gear calibrating instrument：By institute's rheme before examining
Displacement sensor 13 is arranged in the B measured holes of the dial framework 15, and institute's displacement sensors 13 are adjusted to after original position
" 0 " is set to, by penetrator and test stand removal, the base 16 is placed in hardometer test stand by the locating shaft 17
Position, rising test stand makes penetrator axle and the central contact of gland 1, continues to rise test stand extremely in the case where giving test force to act on
Hardometer impression sounding gear indicating value is directed at " 100 " position after 3 times by " 0 " to " 100 " position, repeatedly, by the sensor 13
It is adjusted to " 0 ", declines hardometer test stand, allow impression sounding gear indicating value to return to " 0 " from " 100 ", again by the sensor
13 are adjusted to " 0 ", now promote the gage button 5 by rotating the measuring staff 8, by technical standard requirement, with the displacement sensing
The indicating value of device 13 is defined, by hardness determination point from low to high：3 points of HR25, HR50, HR75 tests successively, reads hardometer phase
The indicating value answered, obtains the error of impression sounding gear indicating value.
The elastomer 3 selects annular, be because it in small value force with good metrological characteristic, enter backhaul phase
Small to error, process for machining is fairly simple, but is also not necessarily limited to annular, also can select the elastomer of other shapes.
Same structure principle of the present invention can also be respectively：The special calibrating instrument of metal Rockwell apparatus Direct Test method, gold
The special calibrating instrument of metal surface Rockwell apparatus Direct Test method, the special calibrating instrument of plastics Rockwell apparatus Direct Test method.
Institute's displacement sensors 13 belong to commodity purchased.
Claims (5)
1. the special calibrating instrument of Rockwell apparatus Direct Test method, it is by the standard dynamometer and sounding gear of Direct Test law regulation
Calibrating instrument is designed on same instrument, it is characterized in that：It can not only examine the error of Rockwell apparatus test force but also can examine pressure
The error of trace depth measurement device indicating value, it includes：Gland (1), steel ball (2), elastomer (3), lever shaft (4), gage button (5),
Lever stage clip (6), measuring staff stage clip (7), measuring staff (8), support (9), upper contact (10), lever (11), A measurement points (12), displacement
Sensor (13), B measurement points (14), dial framework (15), base (16), locating shaft (17)；
The annexation of above-mentioned parts is：The gland (1) is fixed together with the steel ball (2), is placed in the elasticity
In the ball impression at body (3) central shaft upper surface center；The elastomer (3) is in annular, and central shaft upper end planar central has peace
The ball impression of the steel ball (2) is put, there is the screw for installing the base (16) at central shaft lower end plane center；The lever shaft (4)
It is connected, and is arranged on by bearing on the support (9) with the lever (11)；The lever stage clip (6) is arranged on the branch
Between frame (9) and the lever (11)；The measuring staff stage clip (7) is sleeved on the measuring staff (8), and the measuring staff (8) is arranged on
In screw on the support (9), the top of the measuring staff (8) and the gage button (5) being arranged on the lever (11) are right
Should be coaxial；The support (9) is fixed on the right flank of the elastomer (3) central shaft lower end；The lever (11) is a kind of
The lever of square is bent to, the upper contact (10) is arranged on the galianconism of the lever (11), and the upper contact (10) exists
In the presence of the lever stage clip (5), it is in close contact with the elastomer (3) central shaft upper inside surface；The lever (11)
Installed on long-armed left surface and the gage button (5) is installed on the A measurement points (12) and B measurement points (14), right flank；Institute's rheme
Displacement sensor (13) is arranged on the dial framework (15), has two measured holes on the dial framework (15)：A measured holes and B measured holes,
The A measured holes and B measured holes are corresponding with the A measurement points (12) on the lever (11) and the B measurement points (14) same
Axle；Institute's displacement sensors (13) are arranged on fixed in the A measured holes of the dial framework (15) or B measured holes, the displacement
The gauge head plane of sensor (13) is in close contact with the A measurement points (12) or B measurement points (14)；The dial framework (15) is fixed on
On the left surface of elastomer (3) the central shaft lower end；The base (16) connects with the elastomer (3) lower plane center screw thread
Connect, there is screw at base (16) the lower plane center, for installing the locating shaft (17).
2. the special calibrating instrument of Rockwell apparatus Direct Test method according to claim 1, it is characterized in that：On the lever (11)
The lever ratio of the upper contact (10) and the A measurement points (12) be 2: 1 and the lever ratio of the B measurement points (14) is 5:
1。
3. the special calibrating instrument of Rockwell apparatus Direct Test method according to claim 1, it is characterized in that：It is used as standard dynamometer
During check test power, it is provided with two ranges of size, when the test force for examining metal Rockwell apparatus and plastics Rockwell apparatus
When, using wide range：Institute's displacement sensors (13) are arranged in the A measured holes on the dial framework (15), dynamometry scope：
500N-2500N, when examining the test force of surface rockwell hardness, using small-range：Institute's displacement sensors (13) are arranged on institute
State in the B measured holes on dial framework (15), dynamometry scope：100N-500N, should meet as the degree of accuracy of standard dynamometer
1 grade in GB/T13634-2012 standards.
4. the special calibrating instrument of Rockwell apparatus Direct Test method according to claim 1, it is characterized in that：Examined as sounding gear
When determining instrument the indicating value of depth of cup measurement apparatus being tested, institute's displacement sensors (13) are arranged on the dial framework (15)
The B measured holes in, examined and determine by the measuring staff (8), should meet GB/ as the technical requirements of sounding gear calibrating instrument
Uncertainty as defined in T230.2-2012 is 0.0002mm (k=2).
5. the special calibrating instrument of Rockwell apparatus Direct Test method according to claim 1, it is characterized in that：In the A measurement points
(12) or the B measurement points (14) inspection when, institute's displacement sensors (13) can be shared, institute's displacement sensors (13)
Uncertainty is not less than 0.001mm, and has output interface, and progress data processing and result printing can be connected with computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135528.3A CN106990008A (en) | 2017-03-02 | 2017-03-02 | The special calibrating instrument of Rockwell apparatus Direct Test method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710135528.3A CN106990008A (en) | 2017-03-02 | 2017-03-02 | The special calibrating instrument of Rockwell apparatus Direct Test method |
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| CN201710135528.3A Pending CN106990008A (en) | 2017-03-02 | 2017-03-02 | The special calibrating instrument of Rockwell apparatus Direct Test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152159A (en) * | 2017-12-28 | 2018-06-12 | 哈尔滨锅炉厂有限责任公司 | The performance characterization method of station boiler stainless steel elbow |
| CN113702232A (en) * | 2021-08-24 | 2021-11-26 | 北京北方车辆集团有限公司 | Full-automatic Brinell indentation measurement system calibration method based on hardness method |
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| JPH11295202A (en) * | 1998-04-06 | 1999-10-29 | Akashi Corp | Unit and system for calibration for rockwell hardness tester |
| CN202693164U (en) * | 2010-05-27 | 2013-01-23 | 吉林市江机民科实业有限公司 | Digital double-range standard dynamometer |
| CN102213663A (en) * | 2011-04-03 | 2011-10-12 | 吉林市江机民科实业有限公司 | Calibration instrument for depth sounding device of metal Rockwell hardness tester |
| US20140224003A1 (en) * | 2012-03-13 | 2014-08-14 | Shenyang Tianxing Testing Instruments Co., LTD | Portable digital display hardness tester |
| CN202582795U (en) * | 2012-05-04 | 2012-12-05 | 吉林市江机民科实业有限公司 | Homotaxial tension-compression standard dynamometer being shaped as Chinese character 'ya' |
| CN105021486A (en) * | 2015-07-16 | 2015-11-04 | 西安航空动力股份有限公司 | Device for calibration of metal rockwell hardness tester indentation depth measurement systems |
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| CN108152159A (en) * | 2017-12-28 | 2018-06-12 | 哈尔滨锅炉厂有限责任公司 | The performance characterization method of station boiler stainless steel elbow |
| CN108152159B (en) * | 2017-12-28 | 2020-11-20 | 哈尔滨锅炉厂有限责任公司 | Performance characterization method of stainless steel bent pipe for power station boiler |
| CN113702232A (en) * | 2021-08-24 | 2021-11-26 | 北京北方车辆集团有限公司 | Full-automatic Brinell indentation measurement system calibration method based on hardness method |
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