CN202471533U - Impress depth measuring device for portable digital display hardness scale - Google Patents
Impress depth measuring device for portable digital display hardness scale Download PDFInfo
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- CN202471533U CN202471533U CN 201220093159 CN201220093159U CN202471533U CN 202471533 U CN202471533 U CN 202471533U CN 201220093159 CN201220093159 CN 201220093159 CN 201220093159 U CN201220093159 U CN 201220093159U CN 202471533 U CN202471533 U CN 202471533U
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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
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The utility model relates to a material hardness detection instrument and particularly relates to an impress depth measuring device for a portable digital display hardness scale. The impress depth measuring device comprises a hand wheel, a rotary encoder, a supporting seat and a micro-metering thread pair composed of a micro-metering nut and a micro-metering screw rod, wherein the micro-metering nut is arranged in the supporting seat; the micro-metering screw rod is inserted into the micro-metering nut and is in threaded connection with the micro-metering nut; one end of the micro-metering screw rod is connected with the hand wheel and the other end of the micro-metering screw rod is a free end; the rotary encoder is arranged on the supporting seat; a rotating shaft of the rotary encoder and the micro-metering screw rod are driven by rotating the hand wheel to synchronously rotate; the micro-metering screw rod moves up and down along the axial direction through rotating the hand wheel; and the displacement of the micro-metering screw rod is measured by the rotary encoder. The impress depth measuring device disclosed by the utility model has the advantages of simple structure, lightness and convenience, high resolution ratio and high precision, and outputs electronic signals; and the intelligent and digital display of the portable hardness scale is convenient to realize.
Description
Technical field
The utility model relates to the material hardness detecting instrument, specifically a kind of scleroscopic depth of cup measurement mechanism of portable digital display that is used for.
Background technology
The most conventional sclerometer all is to adopt the test power that applies regulation to measure the principle of impression then at present; Wherein Rockwell hardometer is to measure the depth of cup difference; Directly show hardness number, Brinell tester is to measure impression diameter, tables look-up or calculates hardness number; Vickers is to measure the impression catercorner length, tables look-up or calculates hardness number.
, publication number disclosed March 6 nineteen fifty-one is US2; 544; Described a kind of portable Rockwell hardness tester in 205 the United States Patent (USP), this sclerometer is made up of handwheel, micrometer nut, micrometric screw, drum, U type elastic body, power value indicating gauge, pressure head and handle.It relies on handwheel to apply test power; Utilize micrometer nut and micrometric screw to cooperate drum to realize the depth of cup measurement; Utilize a U type elastic body coordinate force value indicating gauge to realize the test force measurement, on drum, read hardness number, the depth of cup difference before and after just master trip power loads.Rotate handwheel during test operation, micrometric screw drives drum and rotates thereupon; Simultaneously, pressure head is moved up or down, handwheel whenever rotates a circle, and micrometric screw can produce the axial displacement of a pitch, and drum is shown as hardness number with this displacement segmentation.
, publication number disclosed on April 5th, 1949 is US2; 466; 567 United States Patent (USP),, publication number disclosed June 25 nineteen sixty-eight are US3, and 389,597 United States Patent (USP) and, publication number disclosed on September 7th, 1948 are US2; The portable Rockwell hardness tester of the principle of similitude has been described respectively in 448,645 the United States Patent (USP).
Above-mentioned patent has all adopted a depth of cup measurement mechanism of being made up of micrometer nut, micrometric screw and reading drum; All be to read the scale on the drum through a transparent magnifier that has cross-line, representative of drum scale and the pairing hardness number of depth of cup difference.Owing between magnifier and drum certain distance is arranged, causes the operator may read different hardness numerical value because of the visual angle difference.Above-mentioned instrument exists all that the depth of cup Measurement Resolution is low, precision is not high, be prone to produce problem such as personal error when the inconvenience of hardness number reading, reading.
In on October 7th, 2009 bulletin, notification number is that CN201322709Y, application number are that 200820231921.9 Chinese utility model patent has been described a kind of and the more approaching depth of cup measurement mechanism of United States Patent (USP) texture ratio, this measurement mechanism is made up of micrometer nut, micrometric screw, groove indicator drum and reading drum.The structure that this utility model patent has adopted fixing groove indicator drum and rotation reading groove drum to match in the hardness indication; The reading drum rotates in the fixing groove indicator drum outside; Scale on the reading drum is represented Rockwell's hardness, and each Rockwell's hardness unit is corresponding to the depth of cup difference of 2 μ m.The drum reading structure of this similar milscale is compared with aforesaid U.S. Patent, has improved the reading accuracy of depth of cup measuring accuracy and hardness number, reduced artificial reading error, but this utility model patent still has following shortcoming:
A. still inconvenience of reading, the hardness number that needs the careful operation drum and on drum, carefully read drum scale representative.
B. displacement measurement resolution is low, and precision is low.
C. this depth of cup measurement mechanism can not be exported electronic signal, can't realize that scleroscopic intellectuality and numeral show.
D. above-mentioned utility model patent is when the test Brinell hardness, and efficient is low, and artificial reading error is arranged.Instrument can only extrude an impression on sample, read impression diameter with reading microscope then, and tabling look-up obtains ball hardness number again; Accomplish a Brinell hardness test and need time a few minutes.
Chinese Industrial Standards (CIS) GB/T24523-2009 has stipulated a kind of advanced person's the quick impression of Brinell test method one metal material (Bu Shi) hardness test method, the bathymetry that Brinell hardness that Here it is detects, and Vickers hardness detects also can use same quadrat method, and its principle is:
Sintered carbide ball to certain diameter applies certain test power (comprising initial trial power and performance test power); Be pressed into specimen surface; After the retention time of regulation; Unloaded operation test power, measurement adds under initial trial power, unloaded operation test power front and back ram position difference (depth value).Utilize a plurality of standard Brinell hardness pieces, measure corresponding depth value, ball hardness number is corresponding with depth value, obtain the relation curve of depth of cup and Brinell hardness under certain test condition.When carrying out hardness measurement, corresponding depth of cup of depth value that sclerometer is measured and Brinell hardness relation curve just can obtain the ball hardness number of this material.
Compare with traditional Brinell test method, this method is an important techniques progress.It can realize the fast detecting of Brinell hardness; Direct reading; Can eliminate and continue to use century-old optical microscope; Unmanned be reading error, can solve the bulk article Brinell hardness field quick detection difficult problems of a large amount of existence in the production, even can be implemented in workshop and bulk article is carried out online hardness detect automatically.
It is a new technology that bathymetry Brinell hardness and Vickers hardness detect, and only appears on the external part desktop computer, does not find so far on portable hardometer, to adopt.Its technical difficult points is that the portable hardometer claimed structure is simple, light, the instrument volume is little, the inner space is limited, common high accuracy displacement sensor is installed is had any problem.In addition, high accuracy displacement sensor is used for portable hardometer and also lacks economy.
According to the regulation of relevant criterion, the brineling scope is 8～650HBW, and Portable Brinell hardness tester scale commonly used is the 2.5mm ball, 187.5kg power, and for the sample of hardness number 650HBW, minimum depth of cup has only 0.0365mm.
The maximum value of portable Vickers is the nitriding layer hardness on the large-scale workpieces such as accurate testing mould, axle class, and the accurate detection to nitriding layer hardness on the large-scale workpiece body is a difficult problem in the prior art, and its reason is that nitriding layer is thin and hard; Its thickness has only 0.1～0.4mm; Hardness can surpass 1000HV5, cannot use big test power, is the nitriding layer of 1000HV for hardness; Adopt 5kg test power, depth of cup has only 0.0143mm.What bathymetry was measured in addition is the depth of cup difference, and this numerical value is littler.
How can realize on portable hardometer that high precision, high-resolution displacement measurement are the keys that realizes that bathymetry Brinell hardness and Vickers hardness detect.Usually the inductive displacement transducer and the grating displacement transducer that adopt in the sclerometer field all are difficult to satisfy above-mentioned requirements.Therefore, bathymetry Brinell hardness and Vickers hardness detect and not to see on portable hardometer always and adopt.
If said method can realize on portable hardometer that the accurate detection of then many crucial large scale industry part noumenon hardness just becomes possibility, this will bring the progress of quality management aspect for Related product.
The utility model content
The purpose of the utility model is to provide a kind of scleroscopic depth of cup measurement mechanism of portable digital display that is used for.This depth of cup measurement mechanism is simple in structure, light, resolution is high, precision is high, electronic signal output is arranged; Intelligent and the numeral that can realize portable hardometer shows; Can make portable hardometer can test Rockwell's hardness; Also can utilize bathymetry to realize the field quick detection of Brinell hardness and Vickers hardness, directly show.
The purpose of the utility model realizes through following technical scheme:
The utility model comprises handwheel, rotary encoder, supporting base and the micrometer screw pair of being made up of micrometer nut and micrometric screw; Wherein the micrometer nut is installed in the said supporting base; Said micrometric screw is plugged in the micrometer nut and with the micrometer nut thread and is connected; One end of micrometric screw is connected with said handwheel, and the other end is a free end; Said rotary encoder is installed on the supporting base, and rotary encoder rotation axis and said micrometric screw rotate through the drive of rotation hand wheel synchronously, and the rotation of micrometric screw through handwheel moves up and down vertically; The displacement of said micrometric screw is measured through rotary encoder.
Wherein: an end of said micrometric screw is connected with handwheel through sleeve, and an end of micrometric screw has keyway, and first key is housed in this keyway, and said micrometric screw rotates through first key and sleeve synchronously; Said rotary encoder rotation axis links to each other with micrometric screw through sleeve, and rotates synchronously with said micrometric screw; One end of said sleeve is fixed in the endoporus of handwheel, and the other end is plugged in the center pit of said rotary encoder rotation axis, and micrometric screw is positioned at sleeve inner; The outside surface of said sleeve has first axial groove vertically; The upper edge of said rotary encoder rotation axis is provided with second key; The rotary encoder rotation axis is connected with sleeve through second key, and this second key slides in said first axial groove in the micrometric screw moving process; Said supporting base inside has the hole vertically; The micrometer nut is installed in the hole of supporting base; One end of said micrometer nut is provided with outer cone thread; Circumferentially be evenly equipped with a plurality of second axial grooves in the outer cone thread upper edge, be threaded on the said outer cone thread and regulate the secondary flare nut that cooperates tightness degree of said micrometer screw; Said handwheel, rotary encoder, supporting base, micrometer nut, micrometric screw and sleeve are coaxial.
Advantage of the utility model and good effect are:
The utility model on portable hardometer, adopt micrometer nut, micrometric screw, rotary encoder first combination as the depth of cup measurement mechanism, realized high resolving power and high precision that depth of cup detects, can realize the intellectuality of portable hardometer.
2. the depth of cup measurement mechanism that the utility model provided is used to make portable digital display sclerometer; Can realize utilizing bathymetry to carry out the fast detecting of Brinell hardness and Vickers hardness, directly show; Make on-the-spot fast, accurately the detection of large-scale workpiece body hardness become possibility; Can be used for detecting of the on-the-spot large quantities of workpiece of factory, can replace the not high Leeb Hardness Tester of precision by part.
3. simple in structure, light, the good economy performance of the depth of cup measurement mechanism that the utility model provided is used to make portable digital display sclerometer, helps to realize miniaturization, intellectuality, the low cost of portable hardometer.
Description of drawings
Fig. 1 is the inner structure synoptic diagram of the utility model;
Fig. 2 is applied to the scleroscopic structural representation of portable digital display for the utility model;
Wherein: 1 is lock screw, and 2 is first key, and 3 is handwheel, and 4 is second key, and 5 is rotary encoder; 6 is supporting base, and 7 are the micrometer nut, and 8 is micrometric screw, and 9 is the rotary encoder rotation axis, and 10 is flare nut; 11 is sleeve, and 12 is sample, and 13 is pressure head, and 14 is force transducer, and 15 is sliding sleeve; 16 is steel ball, and 17 is semi-ring, and 18 is pressure cap, and 19 is digital indicator, and 20 is triple bond.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to detail.
As shown in Figure 1; The utility model comprises handwheel 3, rotary encoder 5, supporting base 6, sleeve 11 and the micrometer screw pair of being made up of micrometer nut 7 and micrometric screw 8; Wherein supporting base 6 is a main support; Its inside has circular hole vertically, and micrometer nut 7 is installed in the circular hole of supporting base 6, and micrometric screw 8 is positioned at micrometer nut 7, is threaded with micrometer nut 7; One end (upper end) coupling sleeve 11 of micrometric screw 8; This sleeve 11 is fixed in the endoporus of handwheel 3, and an end of micrometric screw 8 has keyway, and first key 2 is housed in this keyway; Micrometric screw 8 is through the synchronous rotation of first key, 2 maintenances with sleeve 11 and handwheel 3; One end end of micrometric screw 8 is fastening with lock screw 1, and the other end of micrometric screw 8 (lower end) is a free end, can connect device for measuring force.One end (upper end) of micrometer nut 7 is between sleeve 11 and micrometric screw 8; One end of micrometer nut 7 is provided with outer cone thread; Circumferentially be evenly equipped with a plurality of second axial grooves (present embodiment is three) in the outer cone thread upper edge; The flare nut 10 that has been threaded on the outer cone thread is through the secondary tightness degree that cooperates of flare nut 10 scalable micrometer screws.
When rotating handwheel 3, rotary encoder rotation axis 9, sleeve 11 and micrometric screw 8 rotate synchronously, and micrometric screw 8 moves up and down vertically simultaneously.Handwheel 3 whenever rotates a circle, and micrometric screw 8 moves the displacement of a pitch vertically, and rotary encoder 5 is subdivided into several thousand calibration with this displacement, and signal is transferred to electronic circuit board, realizes the accurate measurement to depth of cup with this.Pitch of present embodiment is 0.5mm, in test during Rockwell's hardness, and rotary encoder rotation axis 9 exportable 5000 calibration that whenever rotate a circle, the per minute degree is represented the displacement of 0.1 μ m, is equivalent to 0.05 Rockwell's hardness unit; When adopting bathymetry test Brinell hardness and Vickers hardness; Utilize frequency splitting technology that rotary encoder rotation axis 9 is whenever rotated a circle and export 10000 calibration; The per minute degree is represented the displacement of 0.05 μ m, for Brinell hardness HBW2.5/187.5 scale, is equivalent to 1/730 of minimum depth of cup (hardened steel hardness number 650HBW); For vickers hardness hv 5 scales, be equivalent to 1/280 of minimum depth of cup (nitriding layer hardness number 1000HV5).Can meet the requirement of relevant criterion GB/T230.2, GB/T231.2 and GB/T4340.
The circular hole that the handwheel 3 of the utility model, rotary encoder 5, micrometer nut 7, micrometric screw 8, sleeve 11 and supporting base 6 inside are offered vertically is all coaxial.Handwheel 3 useable electric moters of the utility model substitute, and motor output shaft links to each other with sleeve 11, are rotated by motor-driven sleeve 11, micrometric screw 8 and rotary encoder rotation axis 9.
As shown in Figure 2; The utility model can be applicable to portable hardometer, on the free end of micrometric screw 8, device for measuring force is installed, and in supporting base 6 fronts a digital indicator 19 is installed; This digital indicator 19 is obliquely installed with supporting base 6, is convenient to when operation, observe; The side of supporting base 8 also is provided with electronic circuit board, and the force transducer 14 in rotary encoder 5, digital indicator 19 and the device for measuring force is electrically connected with electronic circuit board respectively.
Device for measuring force comprises sliding sleeve 15, force transducer 14 and pressure head 13; One end (upper end) of sliding sleeve 15 links together through the free end of pressure cap 18 and two semi-rings 17 and said micrometric screw 8; The other end of sliding sleeve 15 (lower end) is threaded with an end (upper end) of force transducer 14; Pressure head 1 is connected the other end (lower end) of force transducer 14, and pressure head 1 can be the ball pressure head, also can be diamond penetrator.Between micrometric screw 8 free-ended end faces and sliding sleeve 15, be provided with steel ball 16, the free end end face of micrometric screw 8 is provided with a ball-type pit that adapts with steel ball 16, cooperates with steel ball 16.The outside surface of sliding sleeve 15 is equipped with triple bond 20, the three strong 20 and in said the 3rd axial groove, slides along circumferentially having the 3rd axial groove on the micrometer nut 7; Sliding sleeve 15 only axially moves in micrometer nut 7 through the guide effect of this triple bond 20, avoids the whole measuring power apparatus to rotate.Steel ball 16 can effectively be eliminated the horizontal force that micrometric screw 8 is caused sliding sleeve 15 and triple bond 20 when rotating.
The depth of cup measurement mechanism that portable digital display sclerometer adopts the utility model to provide, accomplishing once test only needs several seconds to tens seconds time.
According to the requirement of bathymetry Brinell hardness testing standard GB/T24523-2009, before dispatching from the factory, instrument needs test series of standards Brinell hardness piece, in the hardness number input instrument that records, set up hardness-depth of cup curve.Also need do same work when adopting bathymetry to carry out the Vickers hardness test.
The principle of work that the utility model is applied to portable hardometer is:
Rotate handwheel 3, drive sleeve 11, micrometric screw 8, rotary encoder rotation axis 9 rotates synchronously, and micrometric screw 8 is descending with pressure head 13 with sliding sleeve 15 expulsive force sensors 14 through steel ball 16, shifts to sample 12; After pressure head 13 touched sample 12, along with being rotated further of handwheel 3, meeting pressing in sample 12 in pressure head 13 tops produced impressions on sample 12 surfaces.In test process; Force transducer 14 is the suffered test power of monitoring pressure head 13 in real time; And pass the signal to electronic circuit board, when test power reached the first test power value of regulation, electronic circuit board can write down the depth of cup value of this moment; Continue reinforcing to total test force, stop reinforcing and keep official hour; Backward rotation handwheel 3; When test power is reduced to the first test power value of regulation; Electronic circuit board writes down the depth of cup value of this moment once more; Carry out computing to applying the depth of cup difference of master trip power front and back under test power effect just then, on digital indicator 19, demonstrate the hardness number of sample 12.Accomplish whole test operations and only need several seconds to tens second time.
Claims (5)
1. one kind is used for the scleroscopic depth of cup measurement mechanism of portable digital display; It is characterized in that: comprise handwheel (3), rotary encoder (5), supporting base (6) and the micrometer screw pair of forming by micrometer nut (7) and micrometric screw (8); Wherein micrometer nut (7) is installed in the said supporting base (6); Said micrometric screw (8) is plugged in the micrometer nut (7) and with micrometer nut (7) and is threaded, and an end of micrometric screw (8) is connected with said handwheel (3), and the other end is a free end; Said rotary encoder (5) is installed on the supporting base (6), and rotary encoder rotation axis (9) and said micrometric screw (8) rotate through the drive of rotation hand wheel (3) synchronously, and the rotation of micrometric screw (8) through handwheel (3) moves up and down vertically; The displacement of said micrometric screw (8) is measured through rotary encoder (5).
2. by the said scleroscopic depth of cup measurement mechanism of portable digital display that is used for of claim 1; It is characterized in that: an end of said micrometric screw (8) is connected with handwheel (3) through sleeve (11); One end of micrometric screw (8) has keyway; First key (2) is housed in this keyway, and said micrometric screw (8) is through first key (2) and sleeve (11) rotation synchronously; Said rotary encoder rotation axis (9) links to each other with micrometric screw (8) through sleeve (11), and rotates synchronously with said micrometric screw (8).
3. by the said scleroscopic depth of cup measurement mechanism of portable digital display that is used for of claim 2; It is characterized in that: an end of said sleeve (11) is fixed in the endoporus of handwheel (3); The other end is plugged in the center pit of said rotary encoder rotation axis (9), and micrometric screw (8) is positioned at sleeve (11) inside; The outside surface of said sleeve (11) has first axial groove vertically; The upper edge of said rotary encoder rotation axis (9) is provided with second key (4); Rotary encoder rotation axis (9) is connected with sleeve (11) through second key (4), and this second key (4) slides in said first axial groove in micrometric screw (8) moving process.
4. by claim 1 or the 2 said scleroscopic depth of cup measurement mechanisms of portable digital display that are used for; It is characterized in that: said supporting base (6) inside has the hole vertically; Micrometer nut (7) is installed in the hole of supporting base (6); One end of said micrometer nut (7) is provided with outer cone thread, circumferentially is evenly equipped with a plurality of second axial grooves in the outer cone thread upper edge, is threaded on the said outer cone thread to regulate the secondary flare nut (10) that cooperates tightness degree of said micrometer screw.
5. by the said scleroscopic depth of cup measurement mechanism of portable digital display that is used for of claim 2, it is characterized in that: said handwheel (3), rotary encoder (5), supporting base (6), micrometer nut (7), micrometric screw (8) and sleeve (11) are coaxial.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220093159 CN202471533U (en) | 2012-03-13 | 2012-03-13 | Impress depth measuring device for portable digital display hardness scale |
| PCT/CN2013/072449 WO2013135164A1 (en) | 2012-03-13 | 2013-03-12 | Indentation depth measurement device for portable digital display hardness tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220093159 CN202471533U (en) | 2012-03-13 | 2012-03-13 | Impress depth measuring device for portable digital display hardness scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202471533U true CN202471533U (en) | 2012-10-03 |
Family
ID=46919685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220093159 Expired - Fee Related CN202471533U (en) | 2012-03-13 | 2012-03-13 | Impress depth measuring device for portable digital display hardness scale |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202471533U (en) |
| WO (1) | WO2013135164A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013135164A1 (en) * | 2012-03-13 | 2013-09-19 | 沈阳天星试验仪器有限公司 | Indentation depth measurement device for portable digital display hardness tester |
| CN108562506A (en) * | 2018-03-08 | 2018-09-21 | 西南交通大学 | High frequency in situ imaging fatigue tester |
| CN110823734A (en) * | 2019-11-18 | 2020-02-21 | 中国航发贵州黎阳航空动力有限公司 | Method and device for measuring Brinell hardness |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2448645A (en) * | 1945-07-30 | 1948-09-07 | American Pulley Co | Hardness tester |
| US2466567A (en) * | 1947-02-05 | 1949-04-05 | American Pulley Co | Hardness tester |
| US2544205A (en) * | 1947-08-07 | 1951-03-06 | American Pulley Co | Hardness tester |
| US3389597A (en) * | 1964-07-15 | 1968-06-25 | William A. Williams | Hardness tester |
| JPS5872031A (en) * | 1981-10-26 | 1983-04-28 | Shimadzu Corp | Digital relaxation hardness tester foe rubber |
| JP2000292333A (en) * | 1999-04-12 | 2000-10-20 | Akashi Corp | Hardness testing device |
| JP2007078594A (en) * | 2005-09-15 | 2007-03-29 | National Institute Of Advanced Industrial & Technology | Angle measuring device for minute plane |
| CN201322709Y (en) * | 2008-12-22 | 2009-10-07 | 沈阳天星试验仪器有限公司 | Portable type hardometer |
| CN202141656U (en) * | 2011-07-05 | 2012-02-08 | 上海尚材试验机有限公司 | Digital display small-load Brinell hardenss tester |
| CN202471533U (en) * | 2012-03-13 | 2012-10-03 | 沈阳天星试验仪器有限公司 | Impress depth measuring device for portable digital display hardness scale |
-
2012
- 2012-03-13 CN CN 201220093159 patent/CN202471533U/en not_active Expired - Fee Related
-
2013
- 2013-03-12 WO PCT/CN2013/072449 patent/WO2013135164A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013135164A1 (en) * | 2012-03-13 | 2013-09-19 | 沈阳天星试验仪器有限公司 | Indentation depth measurement device for portable digital display hardness tester |
| CN108562506A (en) * | 2018-03-08 | 2018-09-21 | 西南交通大学 | High frequency in situ imaging fatigue tester |
| CN110823734A (en) * | 2019-11-18 | 2020-02-21 | 中国航发贵州黎阳航空动力有限公司 | Method and device for measuring Brinell hardness |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013135164A1 (en) | 2013-09-19 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20180313 |
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| CF01 | Termination of patent right due to non-payment of annual fee |