CN202486006U - Portable digital display hardness measuring device - Google Patents

Portable digital display hardness measuring device Download PDF

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Publication number
CN202486006U
CN202486006U CN2012200921775U CN201220092177U CN202486006U CN 202486006 U CN202486006 U CN 202486006U CN 2012200921775 U CN2012200921775 U CN 2012200921775U CN 201220092177 U CN201220092177 U CN 201220092177U CN 202486006 U CN202486006 U CN 202486006U
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CN
China
Prior art keywords
micrometric screw
rotary encoder
measuring
hardness
digital display
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Withdrawn - After Issue
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CN2012200921775U
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Chinese (zh)
Inventor
张凤林
吴丹
刘丽萍
张路明
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TX TESTING INSTRUMENTS Co
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TX TESTING INSTRUMENTS Co
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Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model relates to a material hardness measuring instrument, in particular to a portable digital display hardness measuring device which mainly comprises a stress application and indentation depth measuring device, a supporting seat, a force measuring device, a pressure head, an electronic circuit board and a displayer. The stress application and indentation depth measuring device is composed of a hand wheel, a rotary encoder and a micrometer screw thread pair. The rotary encoder is disposed on the supporting seat, a micrometer nut is arranged in a hole, the digital displayer is arranged in front of the supporting seat, and the electronic circuit board is disposed on one side face of the supporting seat; a micrometer screw rod is arranged in the micrometer nut, a rotating shaft of the rotary encoder is connected with the micrometer screw rod and rotates with the micrometer screw rod, the upper end of the micrometer screw rod is connected with the hand wheel, the lower end of the micrometer screw rod is connected with the force measuring device, and the lower end of the force measuring device is connected with the pressure head; and the hand wheel, the micrometer screw rod, the force measuring device and the press head are concentric and are connected with each other, and move with rotation of the hand wheel in the axial direction. The portable digital display hardness measuring device has a simple structure, convenient reading, easy operation and high precision, and can be fixed on metal parts through a fixing device to quickly detect hardness of large parts on site.

Description

A kind of portable digital display hardness measuring device
Technical field
The utility model relates to the material hardness detecting instrument, specifically a kind of portable digital display hardness measuring device.
Background technology
The most conventional sclerometer all is to adopt the static afterburning principle of measuring impression then at present.Wherein Rockwell hardometer is to measure depth of cup, directly shows 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.These sclerometers generally all are desktop computers, can only under lab use, and can only test middle-size and small-size part, for the heavy parts that the production scene exists in a large number, need to take laboratory detection hardness after making sample or the sampling; Therefore, these sclerometer work efficiencies are lower, and can not monitor part hardness in the production scene in real time.Do not allow sampling for those; The situation of necessary test piece body hardness; Particularly in the occasion that requires to test key member weld hardness such as boiler, pressure vessel, pressure pipeline; What generally adopt at present is fast, conveniently, but the Leeb Hardness Tester that precision is not high, reliability is relatively poor will pass through to convert obtaining Rockwell, Bu Shi or Vickers hardness number after Leeb Hardness Tester detects; Because what it adopted is dynamically afterburning flip-over type test method, different fully with the test principle of Bu Shi, Rockwell, Vickers hardness, therefore, the hardness number error after the conversion is bigger.
The factory scene presses for a kind of portable digital display instrument that can directly adopt Rockwell, Bu Shi, wishart's test principle to carry out hardness test; That this instrument should have is light, simple to operate, convenient reading, efficient is high, precision is high characteristics, preferably intelligent, automatically calibrating zero point, correcting measuring value automatically.
, 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, utilizes micrometer nut and micrometric screw to cooperate drum to realize the depth of cup measurement, utilizes a U type elastic body coordinate force value indicating gauge to realize the test force measurement, on drum, reads hardness number.
, 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 is mainly used in measures middle-size and small-size part, although US3,389; The chain type sclerometer that 597 accompanying drawing 4 is described can be tested large cylindrical shape parts such as steel pipe, axle class, but very inconvenience of operation needs two people's compounding practices usually; One people helps instrument, and a people is responsible for the chaining bar.Aspect reading, all be to read the hardness scale on the drum through a transparent magnifier that has cross-line, the corresponding scale mark of each Rockwell's hardness unit has been represented the depth of cup increment size of 2 μ m.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 operation inconvenience, efficient are low, be prone to produce error during reading, can not or the problem of inconvenient testing large workpiece.
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 portable hardometer.This utility model patent utilizes two magnetic suction discs that sclerometer is fixed on specimen surface; Hardness is in respect of a depth of cup measurement mechanism of being made up of micrometer nut, micrometric screw and reading drum; Utilize the size of U type elastic shelf and indicating gauge indication test power, hardness number is read on the reading drum.The structure that this utility model patent has adopted fixing groove indicator drum and rotation reading groove drum to cooperate on the hardness indication mechanism; The drum reading structure of this similar milscale is compared with aforesaid U.S. Patent; 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. operation is more loaded down with trivial details, and efficient is low.Its whole testing procedures comprise: hold workpiece-power value table scale to zero-add just test power-reading drum to zero-test power at the beginning of adding overall test power-maintenances test power-test power and being offloaded to-the read hardness number-removal Total Test power on the drum.
B. still inconvenience of reading, reading accuracy is low, has artificial reading error.The hardness number that needs the careful operation drum and on drum, carefully read drum scale representative.
C. displacement measurement and force measurement resolution are low, and precision is low, have artificial reading error.
D. the power value can not be proofreaied and correct.During instrument used, in case small plastic yield takes place U type elastic body or power value indicating gauge is impacted, deviation will take place in power value reading, can cause measuring error thus, in this case, can only return factory's calibrated force value table, can not be proofreaied and correct instrument by the user.
E. it is low to test Brinell hardness efficient, 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, and accomplishing once test needs time a few minutes.
, publication number disclosed on Dec 22nd, 2004 is that CN1556387A, application number are that 200410012621.8 Chinese utility model patent has been described a kind of portable digital display magnetic force sclerometer; This utility model patent has adopted body structure, and critical piece is all in a casing; It adopts the worm and gear structure to apply test power; Displacement transducer has been installed on afterburning main shaft has been used to measure depth of cup; Adopted three force transducers, represented test power with the output sum of three force transducers; Behind electronic circuit and the computer system sensor-lodging, calculate hardness number and show.Also there is following shortcoming in this utility model patent:
A. complex structure is heavy, not portable.
B. operation inconvenience lacks practicality.The instrument that this utility model patent is related, each test all need be unclamped the locking handwheel of both sides, and cabinet rack is fallen; Lock handwheel then; Need the handwheel of bimanualness both sides afterburning during test, test need be unclamped the locking handwheel after accomplishing again, holds up frame; With the locking handwheel of both sides frame is fixed respectively, this loaded down with trivial details working method is difficult to accepted by the operator again.
C. adopted three force transducers, cost is higher.
D. detect about Brinell hardness and Vickers hardness, lack concrete technical scheme.In fact detect Brinell hardness and Vickers hardness, higher to instrument requirement, not only higher to the force measurement accuracy requirement, for the measurement of depth of cup, also require to have higher resolution, measuring accuracy and repeatable accuracy.The general all inaccessible corresponding requirements of displacement transducer commonly used.
Chinese Industrial Standards (CIS) GB/T24523-2009 has stipulated a kind of advanced person's the quick impression of Brinell test method-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 portable digital display hardness measuring device.This hardness measuring device is installed on sample holder or the stationary installation just can constitute portable hardometer; The characteristics that the sclerometer that constitutes has is light, simple in structure, easy to operate, be convenient to reading, efficient is high; Can realize high precision, intelligent test, automatic suppressed zero, automatic correcting measuring value, can test Rockwell's hardness, also can utilize bathymetry to realize the field quick detection of Brinell hardness and Vickers hardness; Replacement is generally used at present, the Leeb Hardness Tester that precision is not high.
The purpose of the utility model realizes through following technical scheme:
The utility model comprises supporting base, device for measuring force, pressure head, electronic circuit board, digital indicator and afterburning and depth of cup measurement mechanism; Said reinforcing and depth of cup measurement mechanism comprise handwheel, rotary encoder 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 connected with the micrometer nut thread, and an end of micrometric screw is connected with said handwheel, and the other end links to each other with said device for measuring force; Said rotary encoder is installed on the supporting base, and rotary encoder rotation axis and said micrometric screw rotate synchronously; Said pressure head is installed on the device for measuring force, moves up and down vertically through the rotation of handwheel with device for measuring force, micrometric screw; Said electronic circuit board and digital indicator are installed in respectively on the supporting base, and the force transducer in rotary encoder, digital indicator and the device for measuring force is electrically connected with said electronic circuit board respectively; 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 second key is housed in this keyway, and said micrometric screw rotates through second 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 triple bond; The rotary encoder rotation axis is connected with sleeve through triple bond, and this triple bond 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 device for measuring force comprises sliding sleeve, force transducer and force transducer seat; Wherein an end of sliding sleeve links to each other with the other end of said micrometric screw; The other end of sliding sleeve is connected with an end of force transducer; Said force transducer seat is installed in the bottom of the other end of force transducer, and said pressure head is connected the lower end of force transducer seat; Be equipped with the lighting circuit plate on the said force transducer seat, this lighting circuit plate is positioned at the top of said pressure head, on the lighting circuit plate, is provided with the LED lamp; One end of said sliding sleeve is connected with the other end of micrometric screw through pressure cap and two semi-rings, between the end face of the micrometric screw other end and sliding sleeve, is provided with steel ball; The outside surface of said sliding sleeve is equipped with first key along circumferentially having the 3rd axial groove on the said micrometer nut, and this first key slides in said the 3rd axial groove; The hole that said sliding sleeve, force transducer, force transducer seat, pressure head, micrometric screw, micrometer nut, rotary encoder rotation axis, handwheel and supporting base inside are offered vertically is coaxial; Said digital indicator is installed on the supporting base, and the display screen and the supporting base of digital indicator are obliquely installed.
Advantage of the utility model and good effect are:
The utility model adopt micrometer nut, micrometric screw, rotary encoder first in the sclerometer field combination as the depth of cup measurement mechanism, realized high resolving power and high precision that depth of cup detects, taken into account economy simultaneously.
2. the utility model utilizes bathymetry to realize the fast detecting of Brinell hardness and Vickers hardness first on portable hardometer; 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. the utility model is simple in structure, light, can be installed in easily on sample holder or the stationary installation to constitute portable hardometer.
4. the utility model test operation is simple, and the operator needs only and accomplishes reinforcing, keeps test power, unloads power, these several simple motions of reading, only can accomplish test with several seconds to tens second time.
5. the utility model is started shooting back automatic calibrated force value zero point at every turn, got rid of because of sensor and the electronic circuit temperature is floated, the time float the error that causes.
6. the utility model can utilize standard block of hardness that the apparatus measures value is proofreaied and correct at any time, still can keep high precision after the long-term use of instrument.
Description of drawings
Fig. 1 is the inner structure synoptic diagram of the utility model;
Fig. 2 is the circuit block diagram of the utility model;
Fig. 3 is installed in the application structure synoptic diagram on the magnetic suction disc for the utility model;
Fig. 4 is installed in the application structure synoptic diagram on the C shape frame for the utility model;
Fig. 5 is the left view of Fig. 4;
Wherein: 1 is pressure head, and 2 is the LED lamp, and 3 is the lighting circuit plate, and 4 is the force transducer seat, and 5 is force transducer, and 6 is sliding sleeve; 7 is first key, and 8 is supporting base, and 9 is rotary encoder, and 10 is the rotary encoder rotation axis, and 11 is handwheel, and 12 is lock screw; 13 is second key, and 14 is sleeve, and 15 is triple bond, and 16 is flare nut, and 17 is micrometric screw, and 18 are the micrometer nut; 19 is digital indicator, and 20 is pressure cap, and 21 is semi-ring, and 22 is steel ball, and 23 is metering circuit, and 24 is cpu circuit; 25 is power circuit, and 26 is electronic circuit board, and 27 is magnetic suction disc, and 28 is C shape frame, and 29 is sample.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to detail.
As shown in Figure 1; The utility model comprises supporting base 8, device for measuring force, pressure head 1, electronic circuit board 26, digital indicator 19 and afterburning and depth of cup measurement mechanism; Wherein afterburning and depth of cup measurement mechanism comprises handwheel 11, rotary encoder 9, sleeve 14 and the micrometer screw pair of being made up of micrometer nut 18 and micrometric screw 17, and device for measuring force comprises sliding sleeve 6, force transducer 5 and force transducer seat 4.
Supporting base 8 is a main support, and its inside has circular hole vertically, and micrometer nut 18 is installed in the circular hole of supporting base 8, and micrometric screw 17 is positioned at micrometer nut 18, is threaded with micrometer nut 18; One end (upper end) coupling sleeve 14 of micrometric screw 17; This sleeve 14 is fixed in the endoporus of handwheel 11; One end of micrometric screw 17 has keyway, and second key 13 is housed in this keyway, and micrometric screw 17 is through the synchronous rotation of second key, 13 maintenances with sleeve 14 and handwheel 11; One end end of micrometric screw 17 is fastening with lock screw 12, and the other end of micrometric screw 17 (lower end) is connected with force transducer 5 through sliding sleeve 6.One end (upper end) of micrometer nut 18 is between sleeve 14 and micrometric screw 17; One end of micrometer nut 18 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 16 that has been threaded on the outer cone thread is through the secondary tightness degree that cooperates of flare nut 16 scalable micrometer screws.
Rotary encoder 9 is installed on the supporting base 8, and rotary encoder rotation axis 10 is coaxial with the micrometer screw pair; One end of sleeve 14 is fixed in the endoporus of handwheel 11; The other end is plugged in the center pit of rotary encoder rotation axis 10; The outside surface of sleeve 14 has first axial groove vertically; The upper edge of rotary encoder rotation axis 10 is provided with triple bond 15, and rotary encoder rotation axis 10 is connected with sleeve 14 through triple bond 15, and this triple bond 15 can slide in first axial groove in micrometric screw 17 moving process.Said rotary encoder rotation axis 10 links to each other with micrometric screw 17 through sleeve 14, and rotates synchronously with said micrometric screw 17.
When rotating handwheel 11, rotary encoder rotation axis 10, sleeve 14 and micrometric screw 17 rotate synchronously, and micrometric screw 17 moves up and down vertically simultaneously.Handwheel 11 whenever rotates a circle, and micrometric screw 17 moves the displacement of a pitch vertically, and rotary encoder 9 is subdivided into several thousand calibration with this displacement, and sends signal to cpu circuit 24 through metering circuit 23, 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 10 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 10 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.
One end (upper end) of sliding sleeve 6 links together through the other end (lower end) of pressure cap 20 and two semi-rings 21 and said micrometric screw 17; The other end of sliding sleeve 6 (lower end) is threaded with an end (upper end) of force transducer 5; Force transducer seat 4 is installed in the bottom of the other end (lower end) of force transducer 5; Pressure head 1 is connected the lower end of force transducer seat 4, and pressure head 1 can be the ball pressure head, also can be diamond penetrator.Between the end face of micrometric screw 17 other ends and sliding sleeve 6, be provided with steel ball 22, the other end end face of micrometric screw 17 is provided with a ball-type pit that adapts with steel ball 22, cooperates with steel ball 22.The outside surface of sliding sleeve 6 is equipped with first key 7 along circumferentially having the 3rd axial groove on the micrometer nut 18, this first strong 7 slides in said the 3rd axial groove; Sliding sleeve 6 only axially moves in micrometer nut 18 through the guide effect of this first key 7, avoids whole measuring power apparatus and pressure head 1 to rotate.Steel ball 22 can effectively be eliminated the horizontal force that micrometric screw 17 is caused sliding sleeve 6 and first key 7 when rotating.A lighting circuit plate 3 also is equipped with in force transducer seat 4 belows, and this lighting circuit plate 3 is provided with LED lamp 2; LED lamp 2 can illuminate test zone during test, is convenient to the operator and selects test point and observation test process.
The circular hole that the sliding sleeve 6 of the utility model, force transducer 5, force transducer seat 4, pressure head 1, micrometric screw 17, micrometer nut 18, rotary encoder rotation axis 10, handwheel 11, sleeve 14 and supporting base 8 inside are offered vertically is all coaxial.Handwheel 11 useable electric moters of the utility model substitute, and motor output shaft links to each other with sleeve 14, are rotated by motor-driven sleeve 14, micrometric screw 17 and rotary encoder rotation axis 10.
The front of supporting base 8 is equipped with a digital indicator 19, and this digital indicator 19 is obliquely installed with supporting base 8, is convenient to when operation, observe, and digital indicator 19 can also be installed on sample holder or the stationary installation; The side of supporting base 8 is provided with electronic circuit board 26, and rotary encoder 9, digital indicator 19, lighting circuit plate 3 and force transducer 5 are electrically connected with electronic circuit board 26 respectively.
Electronic circuit board 26 comprises metering circuit 23, cpu circuit 24 and power circuit 25, and the input of metering circuit 23 is connected to rotary encoder 9 and force transducer 5, and output is connected to cpu circuit 24, and cpu circuit 24 also is connected with digital indicator 19.Force transducer 5 sends power and displacement signal to cpu circuit 24 through metering circuit 23 respectively with rotary encoder 9, after cpu circuit 24 is handled, on digital indicator 19, demonstrates test power power value and the hardness number that records.Electronic circuit board 26 can be to power value automatic zero adjustment, and after the start, cpu circuit 24 is gathered the zero points of force transducers 5 automatically and exported signal, when reinforcing, force transducer 5 output signals are deducted value at zero point after, real-time demonstration power value on digital indicator 19.Electronic circuit board 26 can be installed on the supporting base 8, also can be installed on sample holder or the stationary installation.
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.
Supporting base 8 can be installed on a sample holder or the stationary installation, and the utility model can be installed on the magnetic suction disc 27, holds sample with magnetic force and carries out hardness test, and is as shown in Figure 3; Can also be installed on the C shape frame 28, utilize C shape opening to clamp sample and carry out hardness test, as shown in Figure 4; Also can be installed on other metal supports that are suitable for the clamping sample.
The principle of work of the utility model is:
With sample 29 clampings or fixing after, rotate handwheel 11, drive sleeve 14, micrometric screw 17, rotary encoder rotation axis 10 rotates synchronously, micrometric screw 17 is descending through steel ball 22 and sliding sleeve 6 expulsive force sensors 5, force transducer seat 4 and pressure head 1, shifts to sample 29; After pressure head 1 touched sample 29, along with being rotated further of handwheel 11, meeting pressing in sample 29 in pressure head 1 top produced impressions on sample 29 surfaces.In test process; Force transducer 5 is the suffered test power of monitoring pressure head 1 in real time; And pass the signal to cpu circuit 24, when test power reaches the first test power value of regulation, cpu circuit 24 can record the depth of cup value of this moment; Continue reinforcing to total test force, stop reinforcing and keep official hour; Backward rotation handwheel 11; When test power is reduced to the first test power value of regulation; Cpu circuit 24 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 29.Accomplish whole test operations and only need several seconds to tens second time.
The test operating procedure of present embodiment is simple to only having the following steps:
Fixing sample-apply total test force-maintenance test power-removal total test force-read hardness number-release sample.

Claims (10)

1. portable digital display hardness measuring device; Comprise supporting base, device for measuring force, pressure head, electronic circuit board, digital indicator and afterburning and depth of cup measurement mechanism; It is characterized in that: said reinforcing and depth of cup measurement mechanism comprise handwheel (11), rotary encoder (9) and the micrometer screw pair of being made up of micrometer nut (18) and micrometric screw (17); Wherein micrometer nut (18) is installed in the said supporting base (8); Said micrometric screw (17) is threaded with micrometer nut (18), and an end of micrometric screw (17) is connected with said handwheel (11), and the other end links to each other with said device for measuring force; Said rotary encoder (9) is installed on the supporting base (8), and rotary encoder rotation axis (10) rotates with said micrometric screw (17) synchronously; Said pressure head (1) is installed on the device for measuring force, moves up and down vertically through the rotation of handwheel (11) with device for measuring force, micrometric screw (17); Said electronic circuit board (26) and digital indicator (19) are installed in respectively on the supporting base (8), and the force transducer in rotary encoder (9), digital indicator (19) and the device for measuring force is electrically connected with said electronic circuit board (26) respectively; The displacement of said micrometric screw (17) is measured through rotary encoder (9).
2. by the described portable digital display hardness measuring device of claim 1; It is characterized in that: an end of said micrometric screw (17) is connected with handwheel (11) through sleeve (14); One end of micrometric screw (17) has keyway; Second key (13) is housed in this keyway, and said micrometric screw (17) is through second key (13) and sleeve (14) rotation synchronously; Said rotary encoder rotation axis (10) links to each other with micrometric screw (17) through sleeve (14), and rotates synchronously with said micrometric screw (17).
3. by the described portable digital display hardness measuring device of claim 2; It is characterized in that: an end of said sleeve (14) is fixed in the endoporus of handwheel (11); The other end is plugged in the center pit of said rotary encoder rotation axis (10), and micrometric screw (17) is positioned at sleeve (14) inside; The outside surface of said sleeve (14) has first axial groove vertically; The upper edge of said rotary encoder rotation axis (10) is provided with triple bond (15); Rotary encoder rotation axis (10) is connected with sleeve (14) through triple bond (15), and this triple bond (15) slides in said first axial groove in micrometric screw (17) moving process.
4. by claim 1 or 2 described portable digital display hardness measuring devices; It is characterized in that: said supporting base (8) inside has the hole vertically; Micrometer nut (18) is installed in the hole of supporting base (8); One end of said micrometer nut (18) 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 (16) that cooperates tightness degree of said micrometer screw.
5. by the described portable digital display hardness measuring device of claim 1; It is characterized in that: said device for measuring force comprises sliding sleeve (6), force transducer (5) and force transducer seat (4); Wherein an end of sliding sleeve (6) links to each other with the other end of said micrometric screw (17); The other end of sliding sleeve (6) is connected with an end of force transducer (5), and said force transducer seat (4) is installed in the bottom of the other end of force transducer (5), and said pressure head (1) is connected the lower end of force transducer seat (4).
6. by the described portable digital display hardness measuring device of claim 5; It is characterized in that: be equipped with lighting circuit plate (3) on the said force transducer seat (4); This lighting circuit plate (3) is positioned at the top of said pressure head (1), on lighting circuit plate (3), is provided with LED lamp (2).
7. by claim 5 or 6 described portable digital display hardness measuring devices; It is characterized in that: an end of said sliding sleeve (6) is connected with the other end of micrometric screw (17) through pressure cap (20) and two semi-rings (21), between the end face of micrometric screw (17) other end and sliding sleeve (6), is provided with steel ball (22).
8. by claim 5 or 6 described portable digital display hardness measuring devices; It is characterized in that: the outside surface of said sliding sleeve (6) is along circumferentially having the 3rd axial groove; First key (7) is installed on the said micrometer nut (18), and this first key (7) slides in said the 3rd axial groove.
9. by claim 5 or 6 described portable digital display hardness measuring devices, it is characterized in that: the inner hole of offering vertically of said sliding sleeve (6), force transducer (5), force transducer seat (4), pressure head (1), micrometric screw (17), micrometer nut (18), rotary encoder rotation axis (10), handwheel (11) and supporting base (8) is coaxial.
10. by the described portable digital display hardness measuring device of claim 1, it is characterized in that: said digital indicator (19) is installed on the supporting base (8), is obliquely installed with supporting base (8).
CN2012200921775U 2012-03-13 2012-03-13 Portable digital display hardness measuring device Withdrawn - After Issue CN202486006U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103308405A (en) * 2012-03-13 2013-09-18 沈阳天星试验仪器有限公司 Portable digital display hardness measuring device
WO2013135162A1 (en) * 2012-03-13 2013-09-19 沈阳天星试验仪器有限公司 Portable digital display hardness tester
CN105067460A (en) * 2015-07-29 2015-11-18 沈阳天星试验仪器有限公司 Self-adaptive hardness measuring machine
CN110018071A (en) * 2019-04-17 2019-07-16 南京邮电大学 Failure detector based on impression measurement

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103308405A (en) * 2012-03-13 2013-09-18 沈阳天星试验仪器有限公司 Portable digital display hardness measuring device
WO2013135162A1 (en) * 2012-03-13 2013-09-19 沈阳天星试验仪器有限公司 Portable digital display hardness tester
CN103308405B (en) * 2012-03-13 2015-06-17 沈阳天星试验仪器有限公司 Portable digital display hardness measuring device
US9366610B2 (en) 2012-03-13 2016-06-14 Shenyang Tianxing Testing Instruments Co., Ltd. Portable digital display hardness tester
RU2601512C2 (en) * 2012-03-13 2016-11-10 Шэньян Тяньсин Тестинг Инструментс Ко., Лтд. Portable hardness tester with digital display
CN105067460A (en) * 2015-07-29 2015-11-18 沈阳天星试验仪器有限公司 Self-adaptive hardness measuring machine
CN105067460B (en) * 2015-07-29 2018-03-09 沈阳天星试验仪器有限公司 adaptive hardness measuring machine
CN110018071A (en) * 2019-04-17 2019-07-16 南京邮电大学 Failure detector based on impression measurement

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